HDFC Bank Limited (HDB) 20-F 29 Jul 24 2024 FY Annual report (foreign) Financial data

Cover Page

Cover Page	12 Months Ended
	Mar. 31, 2024 shares
Document Information [Line Items]
Document Type	20-F
Amendment Flag	false
Document Period End Date	Mar. 31, 2024
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	FY
Entity Registrant Name	HDFC BANK LIMITED
Entity Central Index Key	0001144967
Current Fiscal Year End Date	--03-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding	7,596,910,662
Title of 12(b) Security	American Depositary Shares, each representing three Equity Shares, Par value Rs. 1.0 per share
Trading Symbol	HDB
Document Annual Report	true
Security Exchange Name	NYSE
Document Transition Report	false
Document Shell Company Report	false
Entity Interactive Data Current	Yes
Entity File Number	001-15216
Entity Incorporation, State or Country Code	K7
Entity Address, Address Line One	HDFC Bank House
Entity Address, Address Line Two	Senapati Bapat Marg, Lower Parel
Entity Address, City or Town	Mumbai
Entity Address, Postal Zip Code	400013
Entity Address, Country	IN
Document Registration Statement	false
Document Accounting Standard	U.S. GAAP
ICFR Auditor Attestation Flag	true
Auditor Name	KPMG Assurance and Consulting Services LLP
Auditor Location	Mumbai, India
Auditor Firm ID	2115
Document Financial Statement Error Correction [Flag]	false
Business Contact [Member]
Document Information [Line Items]
Contact Personnel Name	Ajay Agarwal
Contact Personnel Email Address	ajay.agarwal2@hdfcbank.com
Entity Address, Address Line One	HDFC Bank Limited; 4th Floor, HDFC House, 169, HT Parekh Marg
Entity Address, Address Line Two	Backbay Reclamation, Churchgate
Entity Address, City or Town	Mumbai
Entity Address, Postal Zip Code	400020
Entity Address, Country	IN
Country Region	91
City Area Code	22
Local Phone Number	6631-6000

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS ₨ in Millions, $ in Millions	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)
ASSETS:
Cash and due from banks, and restricted cash	₨ 2,086,031.4	$ 25,030.4	₨ 1,387,395.2
Investments held for trading, at fair value	461,245.3	5,534.5	135,831.1
Investments available for sale debt securities, at fair value [includes restricted investments of Rs. 2,070,953.6 and Rs. 1,792,147.6 (US$ 21,504.1), as of March 31, 2023 and March 31, 2024, respectively]	8,295,487.1	99,537.9	4,878,844
Securities purchased under agreements to resell	34,178.3	410.1	455,275.4
Loans [net of allowance of Rs. 365,164.5 and Rs. 457,346.5 (US$ 5,487.7), as of March 31, 2023 and March 31, 2024, respectively]	26,335,700.9	316,003.1	17,052,927.9
Accrued interest receivable	249,644.5	2,995.5	186,091.2
Property and equipment, net	147,030.4	1,764.2	87,569.7
Intangible assets, net	1,396,117.2	16,752.1	0
Goodwill	1,629,510.3	19,552.6	74,937.9
Other assets	2,528,211.3	30,336.1	1,496,751.6
Separate account assets	955,416.3	11,464.1	0
Total assets	44,118,573	529,380.6	25,755,624
Liabilities:
Interest-bearing deposits	20,688,406.2	248,241	16,097,459.3
Non-interest-bearing deposits	3,079,829.4	36,955	2,729,176.3
Total deposits	23,768,235.6	285,196	18,826,635.6
Securities sold under repurchase agreements	56,541	678.4	0
Short-term borrowings	1,313,737.1	15,763.6	1,089,897.5
Accrued interest payable	238,638.8	2,863.4	112,463.2
Long-term debt	6,648,772	79,778.9	2,054,436.4
Accrued expenses and other liabilities	1,295,002.8	15,538.8	754,353.4
Separate account liabilities	955,416.3	11,464.1	0
Liabilities on policies in force	1,763,979.1	21,166.1	0
Undistributed policy holders earnings account	192,067.5	2,304.6	0
Total liabilities	36,232,390.2	434,753.9	22,837,786.1
Commitments and contingencies (see note: 28)
Shareholders' equity:
Equity shares: par value Rs. 1.0 each; authorized 6,500,000,000 shares and 11,906,100,000 shares; issued and outstanding 5,579,742,786 shares and 7,596,910,662 shares, as of March 31, 2023 and March 31, 2024, respectively	7,596.9	91.2	5,579.7
Additional paid-in capital	4,344,576.8	52,130.8	883,371.9
Retained earnings	1,746,416.9	20,955.3	1,447,784.1
Statutory reserve	881,143.2	10,572.9	643,738.7
Accumulated other comprehensive income/ (loss)	(15,540.4)	(186.5)	(68,273.7)
Treasury stock, at cost	(16,866)	(202.4)	0
Total HDFC Bank Limited shareholders' equity	6,947,327.4	83,361.3	2,912,200.7
Noncontrolling interest in subsidiaries	938,855.4	11,265.4	5,637.2
Total shareholders' equity	7,886,182.8	94,626.7	2,917,837.9
Total liabilities and shareholders' equity	₨ 44,118,573	$ 529,380.6	₨ 25,755,624

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) ₨ in Millions, $ in Millions	Mar. 31, 2024 INR (₨) ₨ / shares shares	Mar. 31, 2024 USD ($) shares	Mar. 31, 2023 INR (₨) ₨ / shares shares	Mar. 31, 2023 USD ($) shares
Investments available for sale, at fair value, restricted investments	₨ 1,792,147.6	$ 21,504.1	₨ 2,070,953.6
Loans, allowance	₨ 457,346.5	$ 5,487.7	₨ 365,164.5	$ 4,381.6
Equity shares, par value | ₨ / shares	₨ 1		₨ 1
Equity shares, authorized	11,906,100,000	11,906,100,000	6,500,000,000	6,500,000,000
Equity shares, issued	7,596,910,662	7,596,910,662	5,579,742,786	5,579,742,786
Equity shares, outstanding	7,596,910,662	7,596,910,662	5,579,742,786	5,579,742,786

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2024 INR (₨) ₨ / shares	Mar. 31, 2024 USD ($) $ / shares	Mar. 31, 2023 INR (₨) ₨ / shares	Mar. 31, 2022 INR (₨) ₨ / shares
Interest and dividend revenue:
Loans	₨ 2,194,525.5	$ 26,332.2	₨ 1,351,818	₨ 1,057,925.6
Trading securities	3,563.1	42.8	2,964.6	1,647.5
Available for sale debt securities	516,550	6,198.1	304,566.7	240,943
Other	67,287.6	807.4	30,177.4	32,620.9
Total interest and dividend revenue	2,781,926.2	33,380.5	1,689,526.7	1,333,137
Interest expense:
Deposits	997,405.6	11,967.9	615,108.9	489,010.1
Short-term borrowings	100,181	1,202.1	58,142.8	17,675.2
Long-term debt	432,520.3	5,189.8	101,587.8	77,456.3
Other	3,815.9	45.8	698.7	155.9
Total interest expense	1,533,922.8	18,405.6	775,538.2	584,297.5
Net interest revenue	1,248,003.4	14,974.9	913,988.5	748,839.5
Provision for credit losses	133,063.1	1,596.6	74,213.8	126,979.5
Net interest revenue after provision for credit losses	1,114,940.3	13,378.3	839,774.7	621,860
Non-interest revenue, net:
Fees and commissions	280,965.9	3,371.3	239,603.7	202,979.5
Trading securities gain/(loss), net	41,595	499.1	479.9	2,455.5
Realized gain/(loss) on sales of available for sale debt securities, net	826.7	9.9	(720.3)	16,745.8
Allowance on available for sale debt securities	70.9	0.9	(70.9)	2,915.1
Foreign exchange transactions	15,521.2	186.2	25,547	34,851.4
Derivatives gain/(loss), net	18,558.5	222.7	15,366.1	1,422
Premium and other operating income from the insurance business	381,879.5	4,582.2	0	0
Other, net	(486.8)	(5.8)	11,181	9,204.9
Total non-interest revenue, net	738,930.9	8,866.5	291,386.5	270,574.2
Total revenue, net	1,853,871.2	22,244.8	1,131,161.2	892,434.2
Non-interest expense:
Salaries and staff benefits	288,776	3,465	199,726.8	165,287.7
Premises and equipment	65,131.5	781.5	45,069.9	36,236
Depreciation and amortization	31,147.3	373.7	23,489.7	16,816.9
Administrative and other	281,020.8	3,372	200,493	154,931.4
Amortization of intangible assets	21,201	254.4	0	0
Claims and benefits paid pertaining to insurance business	381,965.8	4,583.2	0	0
Total non-interest expense	1,069,242.4	12,829.8	468,779.4	373,272
(Surplus) / Deficit in P&L transferred to undistributed policyholders earnings account	(79,169.8)	(950)	0	0
Income before income tax expense	705,459	8,465	662,381.8	519,162.2
Income tax expense	77,827.1	933.9	166,117.4	132,559.2
Net income before noncontrolling interest	627,631.9	7,531.1	496,264.4	386,603
Less: Net income attributable to shareholders of noncontrolling interest	4,975.3	59.7	817.5	602.6
Net income attributable to HDFC Bank Limited	₨ 622,656.6	$ 7,471.4	₨ 495,446.9	₨ 386,000.4
Per share information: (see note: 30)
Earnings per equity share—basic | (per share)	₨ 88.66	$ 1.06	₨ 89.02	₨ 69.76
Earnings per equity share—diluted | (per share)	88.31	1.05	88.68	69.38
Per ADS information (where 1 ADS represents 3 shares): (see note: 30)
Earnings per ADS—basic | (per share)	265.98	3.18	267.06	209.28
Earnings per ADS—diluted | (per share)	264.93	3.15	266.04	208.14
Dividends declared per equity share | (per share)	₨ 19.5	$ 0.23	₨ 19	₨ 15.5

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)	Mar. 31, 2022 INR (₨)
Net income before noncontrolling interest	₨ 627,631.9	$ 7,531.1	₨ 496,264.4	₨ 386,603
Long- duration insurance contract discount rate change	(34,112.6)	(409.3)	0	0
Foreign currency translation adjustment:
Net unrealized gain (loss) arising during the period [net of tax Rs. (436.4), Rs. (1,136.5) and Rs. (254.2), as of March 31, 2022, March 31, 2023 and March 31, 2024, respectively]	810.3	9.7	3,378.5	1,297.5
Available for sale debt securities:
Net unrealized gain (loss) arising during the period [net of tax Rs. 12,138.8, Rs. 17,666.8, and Rs. (15,898.7) as of March 31, 2022, March 31, 2023 and March 31, 2024, respectively]	78,036.1	936.4	(52,522.8)	(36,088.6)
Reclassification adjustment for net (gain) loss included in net income [net of tax Rs. 3,426.8, Rs. 449.7, and Rs. (1,675.7) as of March 31, 2022, March 31, 2023 and March 31, 2024, respectively]	4,856.3	58.3	(1,336.9)	(10,187.7)
Other comprehensive income, net of tax	49,590.1	595.1	(50,481.2)	(44,978.8)
(Surplus)/ Deficit in OCI transferred to undistributed policyholders earnings account	3,391.4	40.7	0	0
Total comprehensive income	680,613.4	8,166.9	445,783.2	341,624.2
Less: Comprehensive income attributable to shareholders of noncontrolling interest	5,223.5	62.7	817.5	602.6
Comprehensive income attributable to HDFC Bank Limited	₨ 675,389.9	$ 8,104.2	₨ 444,965.7	₨ 341,021.6

CONSOLIDATED STATEMENTS OF CO_2

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - INR (₨) ₨ in Millions	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Net unrealized gain (loss) arising during the period, tax	₨ (254.2)	₨ (1,136.5)	₨ (436.4)
Net unrealized gain (loss) arising during the period, tax	(15,898.7)	17,666.8	12,138.8
Reclassification adjustment for net (gain) loss included in net income, tax	₨ (1,675.7)	₨ 449.7	₨ 3,426.8

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)	Mar. 31, 2022 INR (₨)
Cash flows from operating activities:
Net income before noncontrolling interest	₨ 627,631.9	$ 7,531.1	₨ 496,264.4	₨ 386,603
Adjustment to reconcile net income to net cash provided by operating activities
Provision for credit losses	133,063.1	1,596.6	74,213.8	126,979.5
Depreciation and amortization	31,147.3	373.7	23,489.7	16,816.9
Amortization of deferred customer acquisition costs and fees	20,848.1	250.2	13,284.8	10,912.3
Amortization of premium/(discount) on investments	22,386.1	268.6	7,845.9	8,493.3
Amortization of intangible assets	21,201	254.4	0	0
Allowance on available for sale debt securities	(70.9)	(0.9)	70.9	(2,915.1)
Deferred tax expense/ (benefit)	(57,133.2)	(685.5)	12,280.9	(9,887.3)
Other gains, net	(2,165.8)	(26)	(8,714.9)	(7,206.5)
Share-based compensation expense	20,115.8	241.4	14,014.6	13,874.5
Net realized (gain)/ loss on sale of available for sale debt securities	(826.7)	(9.9)	720.3	(16,745.8)
(Gain)/ loss on disposal of property and equipment, net	(748)	(9)	(80.6)	(0.9)
Unrealized exchange (gain)/ loss	5,554.3	66.6	276.7	(4,813)
Net change in:
Investments held for trading	(46,372.8)	(556.4)	(87,892)	48,845.7
Accrued interest receivable	(24,104.9)	(289.2)	(51,395.9)	(15,640.8)
Other assets	77,812	933.7	(113,657.6)	(26,227.6)
Accrued interest payable	12,951.8	155.4	29,891.6	4,417.8
Accrued expense and other liabilities	(171,089.9)	(2,053)	66,588	47,512.2
Policyholder's Fund	352,123.2	4,225.1
Net cash provided by operating activities	1,022,322.4	12,266.9	477,200.6	581,018.2
Cash flows from investing activities:
Term placements, net	(353,054.8)	(4,236.3)	(498,561.2)	(366,297.2)
Activity in available for sale debt securities:
Purchases	(4,308,274.6)	(51,695.2)	(1,595,296.1)	(1,736,498.7)
Proceeds from sales	2,296,504	27,555.8	36,463.8	766,585
Maturities, prepayments and calls	1,163,732.2	13,963.7	994,010.6	807,572.1
Net change in repurchase agreements and reverse repurchase agreements	519,749.7	6,236.5	(234,067)	(307,207.6)
Loans purchased	(116,976)	(1,403.6)	(526,272.5)	(282,420.1)
Repayments on loans purchased	52,799.6	633.5	337,760.9	156,441.9
Increase in loans originated, net of principal collections	(3,104,884.4)	(37,255.6)	(2,864,884.7)	(2,328,833.2)
Additions to property and equipment	(53,838)	(646)	(43,620.3)	(26,324.4)
Proceeds from sale or disposal of property and equipment	1,533.9	18.4	426.8	199.1
Proceeds from disposals of business	95,006.7	1,140	0	0
Net cash received on acquisition of HDFC Limited	54,793.7	657.5	0	0
Activity in equity securities, net	80,343.8	964	1,256.7	14,503.3
Net cash used in investing activities	(3,672,564.2)	(44,067.3)	(4,392,783)	(3,302,279.8)
Cash flows from financing activities:
Net increase in deposits	3,368,161.6	40,414.7	3,224,774.3	2,237,238.5
Net increase/(decrease) in short-term borrowings	222,250.1	2,666.8	535,729.9	314,735.9
Proceeds from issue of shares by a subsidiary to noncontrolling interests	3,641.4	43.7	822.7	691.8
Proceeds from issuance of long-term debt	1,155,775.2	13,868.2	1,022,933.1	722,908.9
Repayment of long-term debt	(1,400,297.9)	(16,802.2)	(558,113.6)	(353,325.7)
Proceeds from issuance of equity shares for options and warrants exercised	84,425.4	1,013	34,158.3	26,097.3
Payment of dividends	(86,617.1)	(1,039.3)	(86,394.3)	(36,239.2)
Net cash provided by financing activities	3,347,338.7	40,164.9	4,173,910.4	2,912,107.5
Effect of exchange rate changes on cash and due from banks, and restricted cash	1,539.3	18.5	7,036.1	490.5
Net change in cash and due from banks, and restricted cash	698,636.2	8,383	265,364.1	191,336.4
Cash and due from banks, and restricted cash, beginning of year	1,387,395.2	16,647.4	1,122,031.1	930,694.7
Cash and due from banks, and restricted cash, end of year	2,086,031.4	25,030.4	1,387,395.2	1,122,031.1
Supplementary cash flow information:
Interest paid	1,407,747.2	16,891.6	745,487.8	579,853.8
Income taxes paid, net of refunds	199,753.4	2,396.8	163,674.9	148,381.6
Non-cash investment activities
Payable for purchase of property and equipment	8,613.4	103.4	7,440.6	5,483.3
Trade date sale receivable of available for sale debt securities	₨ 3,607.4	$ 43.3	₨ 0	₨ 749.8
Operating lease right-of-use assets	Refer to note 28— “Commitments and contingencies—Leasecommitments” for more information and balances as at March 31, 2024.	Refer to note 28— “Commitments and contingencies—Leasecommitments” for more information and balances as at March 31, 2024.

CONSOLIDATED STATEMENTS OF SHAR

CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY ₨ in Millions, $ in Millions		INR (₨) shares	USD ($) shares	Equity Shares INR (₨) shares	Equity Shares USD ($) shares	Additional Paid in Capital INR (₨)	Additional Paid in Capital USD ($)	Retained Earnings INR (₨)	Retained Earnings USD ($)	Statutory Reserve INR (₨)		Statutory Reserve USD ($)	[2]	Accumulated Other Comprehensive Income/ (Loss) INR (₨)	Accumulated Other Comprehensive Income/ (Loss) USD ($)	Treasury stock at cost INR (₨)	Treasury stock at cost USD ($)	Total HDFC Bank Limited Shareholders' Equity INR (₨)	Total HDFC Bank Limited Shareholders' Equity USD ($)	Noncontrolling Interest INR (₨)	Noncontrolling Interest USD ($)
Balance at Mar. 31, 2021		₨ 2,163,404.8		₨ 5,512.8		₨ 794,220.3		₨ 897,873.7		₨ 434,835.3	[1]			₨ 27,186.3				₨ 2,159,628.4		₨ 3,776.4
Balance at Mar. 31, 2021 | shares				5,512,776,482	5,512,776,482
Shares issued upon exercise of options		26,097.3		₨ 32.7		26,064.6												26,097.3
Shares issued upon exercise of options (in shares) | shares				32,764,494	32,764,494
Share-based compensation		13,874.5				13,874.5												13,874.5
Dividends		(36,239.2)						(36,239.2)										(36,239.2)
Change in ownership interest in subsidiary		0				455.8												455.8		(455.8)
Shares issued to noncontrolling interest		691.8																0		691.8
Transfer to statutory reserve		0						(94,443.8)		94,443.8	[1]							0
Net income		386,603						386,000.4										386,000.4		602.6
Net change in accumulated other comprehensive income		(44,978.8)												(44,978.8)				(44,978.8)
Balance at Mar. 31, 2022		2,509,453.4		₨ 5,545.5		834,615.2		1,153,191.1		529,279.1	[1]			(17,792.5)				2,504,838.4		4,615
Balance at Mar. 31, 2022 | shares				5,545,540,976	5,545,540,976
Shares issued upon exercise of options		34,158.3		₨ 34.2		34,124.1												34,158.3
Shares issued upon exercise of options (in shares) | shares				34,201,810	34,201,810
Share-based compensation		14,014.6				14,014.6												14,014.6
Dividends		(86,394.3)						(86,394.3)										(86,394.3)
Change in ownership interest in subsidiary		0				618												618		(618)
Shares issued to noncontrolling interest		822.7																0		822.7
Transfer to statutory reserve		0						(114,459.6)		114,459.6	[1]							0
Net income		496,264.4						495,446.9										495,446.9		817.5
Net change in accumulated other comprehensive income		(50,481.2)												(50,481.2)				(50,481.2)
Balance at Mar. 31, 2023		₨ 2,917,837.9		₨ 5,579.7		883,371.9		1,447,784.1		643,738.7	[1],[2]			(68,273.7)				2,912,200.7		5,637.2
Balance at Mar. 31, 2023 | shares		5,579,742,786	5,579,742,786	5,579,742,786	5,579,742,786
Shares issued upon exercise of options		₨ 52,497.3		₨ 46.6		52,450.7												52,497.3		0
Shares issued upon exercise of options (in shares) | shares				46,621,586	46,621,586
Shares issued on account of Business Combination (net)	[3]	4,237,321.3		₨ 1,945.8		3,308,588.4												3,310,534.2		926,787.1
Shares issued on account of Business Combination (net) (in shares) | shares	[3]			1,945,770,658	1,945,770,658
Purchase consideration towards warrants & options eHDFC		45,712.9				45,712.9												45,712.9
Shares issued upon exercise of equity warrant		31,928.1		₨ 24.8		31,903.3												31,928.1		0
Shares issued upon exercise of equity warrant (in shares) | shares				24,775,632	24,775,632
Share-based compensation		20,115.8				20,115.8												20,115.8
Dividends		(86,617.1)						(86,617.1)										(86,617.1)
Change in ownership interest in subsidiary		0				2,433.8												2,433.8		(2,433.8)
Shares issued to noncontrolling interest		3,641.4																0		3,641.4
Treasury stock		(16,868.2)						(2.2)								₨ (16,866)		(16,868.2)
Transfer to statutory reserve		0						(237,404.5)		237,404.5	[2]							0
Net income		627,631.9	$ 7,531.1					622,656.6										622,656.6		4,975.3
Net change in accumulated other comprehensive income		52,981.5												52,733.3				52,733.3		248.2
Balance at Mar. 31, 2024		₨ 7,886,182.8	$ 94,626.7	₨ 7,596.9	$ 91.2	₨ 4,344,576.8	$ 52,130.8	₨ 1,746,416.9	$ 20,955.3	₨ 881,143.2	[2]	$ 10,572.9		₨ (15,540.4)	$ (186.5)	₨ (16,866)	$ (202.4)	₨ 6,947,327.4	$ 83,361.3	₨ 938,855.4	$ 11,265.4
Balance at Mar. 31, 2024 | shares		7,596,910,662	7,596,910,662	7,596,910,662	7,596,910,662
[1]Under local regulations, the Bank is required to transfer 25% of its profit after tax (per Indian GAAP) to a non-distributable statutory reserve and to meet certain other conditions in order to pay dividends without prior RBI approval.[2]Under local regulations, the Bank is required to transfer 25% of its profit after tax (per Indian GAAP) to a non-distributable statutory reserve and to meet certain other conditions in order to pay dividends without prior RBI approval. Of the total transfers to the statutory reserve, Rs. 80,557.3 million (US$ 966.6 million) pertains to acquisition of eHDFC.[3]Net of 1,164,625,834 shares (par value Rs. 1.0 each) cancelled upon business combination.

CONSOLIDATED STATEMENTS OF SH_2

CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2024 INR (₨) ₨ / shares shares	Mar. 31, 2024 USD ($) shares
Shares cancelled on account of business combination | shares	1,164,625,834	1,164,625,834
Per share value of shares cancelled on business combination | ₨ / shares	₨ 1
Housing Development Finance Corporation Limited [Member]
Transfer To Statutory Reserve On Business Combination	₨ 80,557.3	$ 966.6

Pay vs Performance Disclosure

Pay vs Performance Disclosure ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)	Mar. 31, 2022 INR (₨)
Pay vs Performance Disclosure
Net Income (Loss)	₨ 622,656.6	$ 7,471.4	₨ 495,446.9	₨ 386,000.4

Insider Trading Policies and Pr

Insider Trading Policies and Procedures	12 Months Ended
	Mar. 31, 2024
Insider Trading Policies and Procedures [Line Items]
Insider Trading Policies and Procedures Adopted	true

Bank overview

Bank overview	12 Months Ended
	Mar. 31, 2024
Bank overview	1. Bank overview HDFC Bank Limited (the “Bank”) was incorporated in August 1994 with its registered office in Mumbai, India. The Bank is a banking company governed by India’s Banking Regulation Act, 1949. The Bank’s shares are listed on the BSE Limited (formerly known as Bombay Stock Exchange Limited) and The National Stock Exchange of India Ltd. Its American Depositary Shares (“ADS”) are listed on the New York Stock Exchange. Effective July 1, 2023, the Bank’s largest shareholder, Housing Development Finance Corporation Limited (“eHDFC”), along with its subsidiaries merged with the Bank. As on June 30, 2023, along with its subsidiaries it owned 20.8% of the Bank’s equity. The Bank’s equity shares are now widely held by the public and by foreign and Indian institutional investors. The Bank’s principal business activities are retail banking, wholesale banking, treasury services and insurance services. The Bank’s retail banking division provides a variety of deposit products, as well as loans, credit cards, debit cards, third-party mutual funds and insurance, depositary services, trade finance, foreign exchange and derivative The other subsidiaries and associated companies of the Bank are also largely engaged HDFC Life Insurance Company Limited, the Bank’s subsidiary effective July 1, 2023, provides life insurance services and pension management services. HDFC Asset Management Company Limited and its group companies are engaged in asset management business, HDB Financial Services Limited is a non-deposit taking non-banking finance company HDFC Securities Limited is a financial services provider along with broking as a core product, the remaining subsidiaries and associated companies of the Bank are engaged in sourcing business for the Bank or its subsidiaries. HDFC Ergo General Insurance Company Limited, a joint venture company, is engaged in general insurance business.

Summary of significant accounti

Summary of significant accounting policies	12 Months Ended
	Mar. 31, 2024
Significant Accounting Policies [Text Block]	2. Summary of significant accounting polici es a. Principles of consolidation The consolidated financial statements include the accounts of HDFC BANK LIMITED AND SUBSIDIARIES. The Bank consolidates subsidiaries in which, directly or indirectly, it holds more than 50% of the voting rights and/or has control. Entities where the Bank holds 20% to 50% of the voting rights and/or has the ability to exercise significant influence are accounted for under the equity method. These investments are included in other assets and the Bank’s proportionate share of income or loss is included in non-interest revenue, other. The Bank consolidates Variable Interest Entities (“VIEs”) where the Bank is determined to be the primary beneficiary (see note 2k). All significant inter-company balances and transactions are eliminated on consolidation. b. Basis of presentation These consolidated financial statements have been prepared in accordance with the Generally Accepted Accounting Principles in the United States of America (“U.S. GAAP”). U.S. GAAP differs in certain material respects from Generally Accepted Accounting Principles in India, the requirements of India’s Banking Regulation Act 1949 and related regulations issued by the Reserve Bank of India (“RBI”), the guidelines issued by the Securities and Exchange Board of India (“SEBI”), and the guidelines issued by the Insurance Regulatory and Development Authority of India (“IRDAI”) (collectively “Indian GAAP”), which form the basis of the statutory general purpose consolidated financial statements of the Bank in India. Principal differences include the determination of the allowance for credit losses, classification and valuation of investments, classification and valuation of insurance contracts, accounting for deferred taxes, stock-based compensation, loan origination fees, derivative financial instruments, business combination, lease accounting and the presentation format and disclosures of the consolidated financial statements and related c. Use of estimates The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and d. Cash and due from banks, and restricted cash Cash and due from banks comprise of cash and deposit with banks that have original maturities of 90 days or less. The Bank has captioned cash and cash equivalent as “cash and due from banks, and restricted cash” on the consolidated balance sheets. Cash and due from banks include restricted cash (see note 4). e. Customer acquisition costs Customer acquisition costs principally consist of commissions paid to third-party referral agents who source retail loans and such costs are deferred and amortized as a yield adjustment over the life of the loans. Advertising f. Investments in securities Investments consist of securities purchased as part of the Bank’s treasury operations, such as government securities and other debt securities, and investments purchased as part of the Bank’s wholesale banking operations, such as credit substitute securities issued by the Bank’s wholesale banking customers. Credit substitute securities typically consist of commercial paper and debentures issued by the same customers with whom the Bank has a lending relationship in its wholesale banking business. Investment decisions for credit substitute securities are subject to the same credit approval processes as for loans, and the Bank bears the same customer credit risk as it does for loans extended to those customers. Additionally, the yield and maturity terms are generally directly negotiated by the Bank with the issuer. As the Bank’s exposures to such securities are similar to its exposures on its loan portfolio, additional disclosures have been provided on impairment status in note 8 and on concentrations of credit risk in note 11. All other securities, including mortgage-and asset-backed securities, are actively managed as part of the Bank’s treasury operations. The issuers of such securities are either government, public financial institutions or private issuers. These investments are typically purchased from the market, and debt securities are generally publicly-rated. Securities that are held principally for resale in the near term are classified as held for trading (“HFT”) and are carried at fair value, with changes in fair value recorded in net income. Debt securities that management has the positive intent and ability to hold to maturity are classified as held to maturity (“HTM”) and are carried at amortized cost. All debt securities that are not classified as HTM or HFT are classified as available for sale (“AFS”) debt securities and are carried at fair value. Unrealized gains and losses on such securities, net of applicable taxes, are reported in accumulated other comprehensive income/(loss), a separate component of shareholders’ equity. Equity securities are classified under other assets. Marketable securities are measured at fair value and any change in fair Fair values are based on market quotations, where a market quotation is available or otherwise based on present values at current interest rates for such investments. Transfers between categories are recorded at fair value on the date of the transfer. For equity investments (“investee”) where control over an investee is typically determined by majority ownership; however, circumstances may arise where a majority-owned investment is not controlled. In such cases, equity method accounting is applied, particularly when the other shareholder(s) of the investee holds substantive participative rights granted by law or contract. The Bank’s consolidated net income incorporates its proportionate share of the net income or loss from equity method investees. g. Impairment of debt securities The Bank conducts a review of all AFS debt securities with fair value below their carrying value or with zero loss expectation. The Bank evaluates whether the decline in fair value has resulted from credit losses or other factors. In making this assessment, management considers the extent to which fair value is less than amortized cost, any changes to the rating of the security by a rating agency, and adverse conditions specifically related to the security, among other factors. If the assessment indicates that a credit loss exists, the present value of cash flows to be collected from the security are compared to the amortized cost basis of the security. If the present value of cash flows expected to be collected is less than the amortized cost basis, a credit loss exists and an allowance for credit losses is recorded through a provision for credit loss expense, limited by the amount that fair value is less than the amortized cost basis. Any impairment that has not been recorded through an allowance for credit losses is recognized in other comprehensive income. The allowance is increased or decreased if credit conditions subsequently worsen or improve. A reversal of credit losses is recognized in net income. The Bank recognizes the entire difference between amortized cost basis and fair value in net income for impaired AFS debt securities that the Bank has an intent to sell or for which the Bank believes it will more-likely-than-not be required to sell prior to recovery of the amortized cost basis. The Bank does not record an allowance on accrued interest receivables on the balance sheet due to its policy to reverse interest income on debt securities in a timely manner in line with the Bank’s non-accrual and past due policies and on any debt security classified as non-performing. The Bank does not purchase debt securities with credit deterioration. h. Loans The Bank grants retail and wholesale loans to customers. Loans that management has the intent and ability to hold for the foreseeable future or until maturity or payoff are reported at their outstanding unpaid principal balances adjusted for an allowance for credit losses. Loan origination fees and certain direct origination costs are deferred and recognized as adjustments to net income over the lives of the related loans. Interest is accrued on the unpaid principal balance and is included in interest income. Loans are generally placed on “non-accrual” status when interest or principal payments are ninety days past due or if they are considered non-performing, at which time no further interest is accrued and any unrealized interest recognized in the consolidated statement of income is reversed. Interest income and principal payments on loans placed on non-accrual status are recognized when received. Loans are returned to accrual status when all principal and interest amounts contractually due are brought current and future payments are reasonably assured. i. Allowance for credit losses The Bank provides an allowance for credit losses based on management’s which The Bank’s allowance for credit losses comprises of: • the allowance for credit losses, which covers the Bank’s loan portfolios and is presented separately on the balance sheet in Loans, • the allowance for lending-related commitments, which is recognized on the balance sheet in Accrued expenses and other liabilities, • the allowance for credit losses on investment securities, which covers the Bank’s AFS debt securities and is recognized on the balance sheet in Investments AFS debt securities; and • the allowance for credit losses on other financial assets measured at amortized cost, and other off-balance sheet credit exposures, which is recognized on the balance sheet in Accrued expenses and other liabilities. All changes in the allowance for credit losses are recognized in the consolidated statement of income. The Bank’s policies used to determine its allowance for credit losses and its allowance for lending-related commitments are described below: The Bank’s loan portfolio is bifurcated into Retail and Wholesale portfolios, wherein the Retail portfolio is segmented into homogenous pools using various factors such as nature of product, delinquencies, and other demographic and behavioral variables of the borrowers. The wholesale portfolio is segmented into various risk grades on the basis of a host of quantitative and qualitative factors including financial performance, industry risk, business risk and management quality. The allowance for loan-related losses and allowance for lending-related commitments represents expected credit losses over the remaining expected life of outstanding loans and lending-related commitments that are not unconditionally cancellable. The Bank does not record an allowance for future draws on unconditionally cancellable lending-related commitments (e.g., credit cards). The Bank does not record an allowance on accrued interest receivables on the balance sheet due to its policy to reverse interest income on loans more than 90 days past due and in the case of agricultural loans more than 365 days past due, and also on any loans classified as non-performing. The expected life for retail loans and wholesale loans is determined based on their contractual terms and expected prepayments as applicable. The expected life of funded credit card loans is generally estimated by considering expected future payments on the credit card account. The Bank has an Unconditionally Cancellable Clause (“UCC”) for credit card lines and in accordance with the current expected credit loss (CECL) accounting guidance, the Bank makes an allowance only for debt drawn at the time of expected loss measurement. The Bank applies expected principal payments to the credit card receivable balances existing at the reporting date until the balance is exhausted. The estimate of expected credit losses includes expected recoveries of amounts previously charged off or expected to be charged off, even if such recoveries result in a negative allowance. The Retail loans are charged off against allowances typically when the account becomes 150 to 1,095 days past due depending on the type of loan. The defined delinquency levels at which major loan types are charged off are 150 days past due for personal loans and credit card receivables, 180 days for auto loans, commercial vehicle and construction equipment finance, 1,095 days past due for housing loans and on a customer by customer basis in respect of retail business banking when management believes that any future cash flows from these loans are remote including realization of collateral, if applicable, and where any restructuring or any other settlement arrangements were not feasible. The Wholesale loans are charged off against the allowance when management believes that the loan balance may not be recovered, including realization of collateral, if applicable, and where any restructuring or any other settlement arrangements were not feasible. Subsequent recoveries, if any, against write-off cases, are adjusted to provision for credit losses in the consolidated statement of income. Wholesale loans are considered non-performing when, based on current information and events, it is probable that the Bank will be unable to collect scheduled payments of principal or interest when due according to the contractual terms of the loan agreement. Factors considered by management in determining non-performance include payment status, the financial condition of the borrower, the value of collateral held, and the probability of collecting scheduled principal and interest payments when due. Wholesale loans that experienced insignificant payment delays and payment shortfalls are generally not classified as non-performing but are placed on a surveillance watch list and closely monitored for deterioration. Management determines the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including the length of the delay, the reasons for the delay, the borrower’s prior payment record, market information, and the amount of the shortfall in relation to the principal and interest owed. These factors are considered by the Bank for selection of loans for credit reviews and assessment of allowance. In order to estimate the allowance, the Bank primarily relies on its risk-segmentation models, which are also an integral part of the Bank’s risk management framework. Risk segmentation aims to group homogenous exposures together to allow for collective assessment of expected losses. Expected Loss estimation under collective assessment, is primarily based on Probability of Default (“PD”), Loss given Default (“LGD”) and Exposure at Default (“EAD”) estimates. The Bank has modeled its PD estimates at the aforementioned granularity for its retail and wholesale portfolios and has also created the remaining expected life structure of the same for computation of credit losses. The Bank’s off-balance sheet credit exposures include unfunded loan commitments, financial guarantees, including standby letters of credit, and other similar instruments. For off-balance sheet credit exposures, the Bank recognizes an allowance for credit loss (“ACL”) associated with the unfunded amounts. The Bank does not recognize an ACL for commitments that are unconditionally cancellable at the Bank’s discretion. ACL for off-balance sheet credit exposures are reported as a liability in accrued expenses and other liabilities on the consolidated balance sheet. ACL in such cases is measured for the remaining contractual term, adjusted for prepayments, of the financial asset (including off-balance sheet credit exposures) using historical experience, current conditions, and reasonable and supportable forecasts. Collective and individual assessments Management estimates the allowance balance using relevant available information, from internal and external sources, relating to historical experience, current conditions, and reasonable and supportable forecasts. Historical loan default and loss experience provides the basis for the estimation of expected credit losses. Adjustments to historical loss information incorporate management’s view of current conditions and forecasts. The methodology for estimating the amount of credit losses reported in the allowance for credit losses has two basic components: first, a pooled component for expected credit losses for pools of loans that share similar risk characteristics and second an asset-specific component involving loans that do not share risk characteristics and the measurement of expected credit losses for such individual loans. As an integral part of the credit process, the Bank has a rating model appropriate to its retail and wholesale credit segments. The Bank monitors credit quality within its segments based on primary credit quality indicators. This internal rating (model scale) is updated at least annually. The majority of the Bank’s credit exposures share risk characteristics with other similar exposures, and as a result are collectively assessed for allowance (“portfolio-based component”) by grouping them into homogeneous pools of loans. If an exposure does not share risk characteristics with other exposures, the Bank generally estimates expected credit losses on an individual basis, considering expected repayment and conditions impacting that individual exposure (“asset-specific component”). The asset-specific component covers loans modified or reasonably expected to be modified in a troubled debt restructuring (“TDR”), collateral-dependent loans, and borrowers with financial difficulties. Portfolio-based component (Pooled Loans) The portfolio-based component begins with a quantitative calculation that considers the likelihood of the Apart from its historical experience, the Bank seeks to incorporate any reasonable and supportable information regarding the prevalent and future economic and operating conditions, and their impact on credit losses for the Bank into its allowance. The Bank therefore includes in its estimation the use of quantitative statistical models to predict the impact of macro-economic variables, on defaults. The Bank uses The Bank estimates its allowance for credit losses for pooled loans based on its PD and LGD, determined for the respective risk pools. The Bank estimated the collective ACL using a current expected credit losses methodology which is based on relevant information about historical experience, current conditions, and reasonable and supportable forecasts. The allowance for credit losses for the quantitative component of pooled loans is the product of multiplying the PD, LGD and EAD. Asset-specific component To determine the asset-specific component of the allowance, collateral-dependent loans (including those loans for which foreclosure is probable) and larger and non-accrual risk-rated loans in the wholesale portfolio segment are generally evaluated individually, while smaller loans (both scored and risk-rated) are aggregated for evaluation based on factors relevant for the respective class of assets. Loans are identified for individual assessment based on financial difficulty which includes nonperforming loans, labeled loans and loans identified based on management judgment. The Bank generally measures the asset-specific allowance as the difference between the amortized cost of the loan and the present value of the cash flows expected to be collected, discounted at the loan’s original effective interest rate. Subsequent changes in impairment, including those related to the passage of time, are generally recognized as an adjustment to the allowance for credit losses. For collateral-dependent loans, the fair value of collateral less estimated costs to sell is used to determine the charge-off amount for declines in value (to reduce the amortized cost of the loan to the fair value of collateral) or the amount of the negative allowance that should be recognized (for recoveries of prior charge-offs associated with improvements in the fair value of collateral). The asset-specific component of the allowance for credit losses that have been or are expected to be modified in TDRs incorporates the effect of the modification on the loan’s expected cash flows (including forgone interest, principal forgiveness, and other concessions), and also the potential for redefault. For wholesale loans modified or expected to be modified in TDRs, expected losses incorporate management’s expectation of the borrower’s ability to repay under the modified terms. Estimating the timing and amounts of future cash flows is highly subject to judgment as these cash flow projections rely upon estimates such as loss severities, asset valuations, default rates (including redefault rates on modified loans), the amounts and timing of interest or principal payments (including any expected prepayments) or other factors that are reflective of current and expected market conditions. All of these estimates and assumptions require significant management judgment and certain assumptions are highly subjective. j. Insurance Services i. Undistributed policyholders earnings account This separate line item • Actuarial remeasurement of insurance liabilities; • Effective interest method on Investments; • Fair value of investments available for sale debt securities and Investments held for trading; • Fair valuation of employees stock option scheme; • Adjustment on account of leases; • Actuarial remeasurement of employee benefits; and • Reversal of hedge reserve from previous framework ii. Liabilities on policies in force The Bank establishes liabilities for future policy benefit liabilities (“LFPBs”) for amounts payable under traditional non-participating and limited-payment long-duration insurance contracts. Generally, amounts are payable over an extended period of time and the related liabilities are calculated as the present value of future expected benefits and claim settlement expenses to be paid, reduced by the present value of future expected net premiums. Contracts are grouped as cohorts when measuring LFPBs. The corresponding liabilities are established based on methods and underlying assumptions in accordance with US GAAP and applicable actuarial standards. A net premium ratio (“NPR”) approach is utilized, where net premiums (i.e., the portion of gross premiums required to fund expected insurance benefits and claim settlement expenses) are accrued each period as LFPBs. Cash flow assumptions are incorporated into the calculation of a cohort’s NPR and LFPB reserve. The Bank’s best estimate assumptions include mortality, persistency, morbidity, and expenses. All assumptions would be updated at each year end except for current discount rates, which will be updated at each valuation date. The impact of all assumption changes at locked in discount rates would flow through Statement of Income and the impact of discount rate update will be recognized in Other Comprehensive Income. For limited-payment long-duration contracts, the collection of premiums does not represent the completion of the earnings process. Therefore, any gross premium received in excess of net premiums is deferred and amortized as a deferred profit liability (“DPL”). The amortization basis is set to be the sum assured in-force for traditional policies and benefit outgo for annuities for each cohort, to ensure that profits are recognized over the life of the underlying policies in that cohort, regardless of when premiums are received. This amortization of the DPL is recorded through net income within “Claims and benefits paid pertaining to insurance business”. Consistent with the Bank’s measurement of traditional long-duration products, management also recognizes a LFPB reserve for limited-payment contracts that is representative of the difference between the present value of expected future benefits and the present value of expected future net premiums, subject to retrospective remeasurement through net income and OCI, as described above. The Bank establishes LFPBs for traditional participating contracts, using a net premium approach, similar to traditional non-participating contracts. For determining present value of benefits, the future reversionary bonus has not been considered. The bonuses will get factored in as and when they are declared. The discount rate and actuarial assumptions are locked-in at inception, and any the impact of discount rate update will be recognized in Other Comprehensive Income. Deposits related to universal life-type and investment products are credited to policyholder account balances. Policyholder Account Balances liability represents the contract value that has accrued to the benefit of the policyholder as of the balance sheet date. This liability is primarily associated with accumulated account deposits, plus interest credited, less policyholder withdrawals and other charges assessed against the account balance, as applicable. Unearned revenue reserve primarily relates to the universal Life-type products and represents policy charges for services to be provided in future periods. The charges are deferred as unearned revenue are generally amortized over the expected life of the contract similar to DAC. iii. Separate Account Assets and Liabilities Separate account assets represents segregated funds that iv. Deferred Acquisition Costs (“DAC”) Acquisition costs directly related to successful contract acquisitions of products have been deferred to the extent recoverable. Such acquisition costs are capitalized in the period they are incurred, and primarily include initial commission, employees remuneration and welfare benefits, medical fees, stamp duty and goods and services tax. All other acquisition-related costs including those related to general advertising and solicitation, market research, agent training, product development, unsuccessful sales, and underwriting efforts as well as all indirect costs are expensed as incurred. DAC is amortized on a constant level basis that approximates straight line amortization using the following amortization basis: • Traditional life insurance contracts and traditional life insurance limited payment contracts – Sum assured in force. • Annuity products – Number of policies in force. • Universal life type contracts – Number of policies in force. Amortization of DAC is included in “Administrative and other expense”. v. Reinsurance For prospective reinsurance of short duration contracts that meet the criteria for reinsurance accounting, amounts paid (received) are recorded as ceded premium and ceded unearned premiums. Such amounts are amortized through earned premiums over the remaining contract period in proportion to the amount of insurance protection provided. The reinsurance recoverable for long-duration contracts and associated contract features is measured using assumptions and methods generally consistent with the underlying direct policies. Amounts currently recoverable under reinsurance agreements are included in “Other assets”. The assessment of recoverability of reinsurance recoverable balances in each reporting period, is carried out through either historical trend of disputes and credit events or financial analysis of the credit quality of the reinsurer. These adjustments are recorded to reflect the results of these assessments through an allowance for credit losses and disputes that reduces the carrying amount of reinsurance and other assets on the consolidated balance sheet. The estimate requires significant judgement for which key considerations include paid and unpaid recoverable, whether the balance is in dispute or subject to legal collection, the relative financial health of the reinsurer and whether collateral and collateral arrangement exist. An estimate of the reinsurance recoverable lifetime expected credit losses is established utilizing a probability of default and loss given default method, which reflects the insurer’s risk rating. The allowance for credit losses excludes disputed amounts. vi. Premium Deficiency Premium deficiency reserves may be established for short-duration contracts to provide for expected future losses and certain expenses that exceed unearned premiums. These reserves are based on actuarial estimates of the amount of loss inherent in that period, including losses incurred for which claims have not been reported. The provisions for IBNR (Incurred but Not Reported) claims are calculated using studies that measure the historical length of time between the incurred date of a claim and its eventual reporting to the Bank. If loss recognition exists, to write off DAC to the extent required for eliminating losses. If loss recognition still exists after DAC write-off, then a loss recognition liability would be established. For universal life-type contracts, a premium deficiency reserve may be established when existing contract liabilities, together with the present value of future fees and/or premiums, are not sufficient to cover the present value of future benefits and settlement costs. Loss recognition would be charged to net income by an increase in the liability for future benefits presented separately k. Sales/transfer of receivables The Bank enters into assignment transactions, which are similar to asset-backed securitization transactions through the The Bank first makes a determination as to whether the securitization entity would be consolidated. Second, it determines whether the transfer of financial assets is considered a sale. Furthermore, former qualifying special purpose entities (QSPEs) are now considered VIEs and are no longer exempt from consolidation. The Bank consolidates VIEs when it has both: (1) power to direct activities of the VIE that most significantly impact the entity’s economic performance and (2) an obligation to absorb losses or right to receive benefits from the entity that could potentially be significant to the VIE. The scope conditions examined include whether the entities’ equity investment at risk is insufficient to finance the activities without subordinated financial support and whether the holders of equity lack the characteristics of a financial interest. A controlling financial interest includes characteristics such as ability to make decisions through voting or similar rights, unlimited obligation to absorb the entities expected losses, and unlimited rights to receive the entities expected residual returns. Gains or losses from the sale of receivables are recognized in the consolidated statement of income in the period the sale occurs based on the relative fair value of the portion sold and the portion allocated to retained interests, and are reported net of the estimated cost of servicing by the Bank. Fair values are determined based on the present value of expected future cash flows, using best estimates for key assumptions, such as prepayment and discount rates, commensurate with the risk involved. l. Property and equipment Property and equipment are stated at cost, less accumulated depreciation. Depreciation is provided over the estimated useful lives of property and equipment on a straight-line basis at the following rates: Type of Asset Rate of depreciation Premises 1.67% Software and systems 20.00% Equipment and furniture 10.00%-33.33% For assets purchased and sold during the year, depreciation is provided on a pro rata basis by the Bank and capital advances are included in other assets. Improvements to leasehold premises are charged off over the remaining primary m. Lease accounting The Bank recognizes its lease liabilities measured as the present value of lease payments not yet paid, discounted using the incremental borrowing rate. The right-of-use asset includes an initial measurement of the lease liabilities adjusted for accrued lease liabilities. At the inception of the contract, the Bank assesses whether the contract is, or contains, a lease. The Bank’s assessment is based on whether (1) the contract involves the use of distinct identified assets, (2) the Bank has the right to substantially all the economic benefit from the use of the asset throughout the term of the contract, and (3) the Bank has the right to direct the use of the asset. Leases are examined for classification as either finance leases or operating leases. A lease is classified as a finance lease if any one of the following criteria is met (1) the lease transfers ownership of the asset by the end of the lease term, (2) the lease contains an option to purchase the asset that is reasonably certain to be exercised, (3) the lease term is for the major part of the remaining useful life of the asset or (4) the present value of the lease payments equals or exceeds substantially all of the fair value of the asset. A lease is classified as an operatin

Business Combination

Business Combination	12 Months Ended
	Mar. 31, 2024
Business Combinations [Abstract]
Business Combination	3 During the year, on July 01, 2023, the Bank completed acquisition of % equity interest in eHDFC a housing finance company in India providing housing loans to individuals as well as corporates, undertaking lease rental discounting and construction finance. Post-acquisition, all the subsidiaries and affiliates of eHDFC (eHDFC and its subsidiaries and affiliates together referred to as “eHDFC group”) became subsidiaries and affiliates of the Bank. Pursuant to the Scheme of Amalgamation dated April 04, 2022 (“Scheme”) and as amended (face value Rs.1 each) the shares (face value Rs.2 each) held in eHDFC. The scheme was approved by the shareholders at the National Company Law Tribunal (“NCLT”) convened meeting of the shareholders of the the on (“Effective date”), resulting in the Bank obtaining control Total purchase consideration was Rs. 5,337,741.5 million (US$ 64,047.9 million) the (US$ 20.4) The o s equity shares post acquisition and fair valued using the binomial method. Share and fair valued using the Black and Scholes method. i improve The results of operations acquired from eHDFC group have been included in the Bank’s financial statements since July 01, 2023. The business combination has been accounted for using the acquisition method of accounting in accordance with ASC 805, Business Combinations. Accordingly, assets acquired and liabilities assumed were recorded at their estimated fair value on the acquisition date. The determination of estimated fair values required management to exercise judgment and make estimates concerning discount rates, anticipated future cash flows, prevailing market conditions, among others at the time of the merger, and other forthcoming events that are highly sensitive in nature. The following table provides a purchase price allocation to of Particulars As of July 1, 2023, (In millions) Consideration Common equity share issued (3,110,396,492 shares of the R s. 5,292,028.6 US$ 63,499.3 Share-based compensation 35,240.7 422.9 Share w 10,472.2 125.7 Fair value of total transferred 5,337,741.5 64,047.9 Settlement of p (refer note below) (69,312.6 ) (831.7 ) Investment in the Bank by eHDFC (refer note below)  (1,981,494.4 )  (23,776.0 ) Fair value of net purchase consideration transferred 3,286,934.5 39,440.2 Acquisition-related costs 1,900.0 22.8 Less: A.  Cash and due from banks 10,344.1 124.1 Investment securities 2,842,356.2 34,105.5 Loans - Net 6,428,635.4 77,137.5 Accrued interest receivable 37,276.7 447.3 Property and equipment 39,136.2 469.6 Identified intangibles assets 1,434,818.1 17,216.4 Other assets 622,978.8 7,475.1 Separate account assets 857,528.7 10,289.5 Total estimated assets acquired  12,273,074.2  147,265.0 Add: B. Deposits 1,571,204.5 18,852.9 Accrued expenses and other liabilities 781,742.3 9,380.0 Borrowings 4,977,276.5 59,722.5 Separate account liabilities 857,528.7 10,289.5 Liabilities on policies in force 1,499,749.1 17,995.5 Noncontrolling Interest in eHDFC subsidiaries 926,787.1 11,120.6 Total estimated liabilities assumed 10,614,288.2 127,361.0 Goodwill 1,628,148.5  19,536.2 Above identifiable net assets includes assets and liabilities of the disposal group classified as held for sale as on date of acquisition i.e., HDFC Credila Financial Services Limited and HDFC Education and Development Services Limited amounting to Rs.103,500 million (US$ 1,241.9 million) [includes goodwill amounting to Rs.73,576.1 million (US$ 882.8 million)] and Rs.1,976.0 million (US$ 23.7 million), respectively. Total amount of g million (US$ million). None of the goodwill recognized is The recorded goodwill of Rs. 1,628,148.5 million (US$ 19,536.2 million) resulting from the acquisition primarily reflects the anticipated synergies and economies of scale derived from the integration of operations between the Bank and eHDFC group. Additionally, a portion of this goodwill is attributable to intangible assets that do not meet the criteria for separate recognition as per ASC 805, Business Combinations. Goodwill is allocated among the Cash Generating Units (CGUs) as per assignment method where goodwill is derived from the residual amount on the relative excess of the fair value of the CGUs over the net assets of the CGUs. The assignment of Goodwill recorded as a result of the acquisition to the Bank’s reportable segments is as follows: Particulars As of July 1, 2023, (In millions) Retail Banking Rs.  368,079.6 US$  4,416.6 Wholesale Banking 71,617.3 859.3 Insurance Services 959,080.0 11,508.0 Others 229,371.6 2,752.3 Total  1,628,148.5  19,536.2 Valuation methodology adopted for estimation of fair values of significant assets acquired and liabilities assumed: Cash and due from Investment in securities Loans Property and Equipment : Other assets Separate account assets and liabilities The liabilities primarily represent the policyholder’s account balances in separate account assets and will be equal and offsetting to total separate account assets. Deposits Borrowings Liabilities on policies in force and long Noncontrolling interest Intangible assets disclosure The Bank has assigned Rs. 1,434,818.1 million (US$ 17,216.4 million) of the purchase price to identifiable intangible assets consisting of brand, investment management contract, value of business acquired, distribution network, customer relationship and transferable development rights As of July 1, 2023 Estimated Fair Value (In millions) Useful lives (in years) Valuation Methodology Intangible asset Brand Rs. 750,758.2 US$ 9,008.4 Indefinite life Relief from royalty method (a) Investment management contract 369,785.6 4,437.1 Indefinite life (b) Value of business acquired 221,738.5 2,660.6 Life of the underlying contracts Refer below (c) Distribution network 59,543.2 714.5 17 (b) Customer relationship 29,874.9 358.4 17 (b) Transferable development rights 3,117.7 37.4 8 Comparison method Total 1,434,818.1 17,216.4 Above intangible assets includes Brand amounting to Rs. 8,527.5 million (US $ 102.3 million ) o Rs. 8,972.4 million (US $ 107.6 million) (a) Relief from royalty method: The principle of the relief-from-royalty-method asserts that the value of an intangible asset is what the owner would pay to licence of the asset if he did not own it. In other words, the value equates to the avoided cost of not having to pay a royalty. (b) Multi-period excess earnings Method (MEEM): The MEEM method is predicted on the basis that the value of the intangible asset is the present value of the earnings it generates, net of a reasonable return on the other assets also contributing to the stream of earnings. Valuation of Investment Management Contract, Distribution Network and Customer Relationship is done under Income Approach. (c) Difference between the estimated Fair Value of liabilities (FVL) and the value of Liabilities (GVL). The FVL is derived as the sum of the best estimate of liabilities (“BEL”) and the risk margin (“RM”). GVL is derived as the liability for future policy benefits (“LFPB”) plus other liability items less reinsurance recoverable (refer note 20). Brand Investment management contract (the “Contract”) Value of business acquired (“VOBA”) Distribution network & Customer relationship Transferable development rights (“TDR”) Unaudited Pro forma Financial Information: Following is the unaudited pro forma financial information for the year s unaudited pro forma information should not be relied upon as being indicative of the historical results of operations that would have occurred had the acquisition taken place on April 01, 2022. As of Particulars March 31, 2023 March 31, 2024 (In million) Revenue (a) Rs.  2,147,961.5 US$  25,773.5 Rs.  2,303,956.6 US$  27,645.3 Net Income 636,783.4 7,640.8 645,526.0 7,745.7 (a) Revenue includes net interest revenue and non-interest revenue. Acquisition costs are included in the periods where such expenses are incurred The unaudited pro forma financial information presented includes the estimated business combination accounting effects resulting from the acquisition, notably acquisition related cost amounting to Rs. 1,900.0 million (US$ 22.8 million), and amortization expense from the intangible assets, advances and debt including its related tax effects amounting to Rs. 41,204.20 million (US$ 494.4 million) and Rs. 36,984.3 million (US$ 443.8 million) for the period ended March 31, 2023 and March 31, 2024 respectively. It does not include any anticipated synergies or other expected benefits of the acquisition. Actual results may differ from the unaudited pro forma information presented below and the differences could be significant. The Bank’s operating results for the year ended March 31, 2024, includes the operating results of acquired assets and assumed liabilities of eHDFC group subsequent to the merger on July 1, 2023. Due to the various conversions of eHDFC systems during the year ended March 31, 2024, as well as other streamlining and integration of operating activities into those of the Bank, the Bank is unable to report separately eHDFC and its subsidiaries’ operations after July 01, 2023 despite making every reasonable effort to do so and thus disclosures of eHDFC’s revenue and earnings since the merger effective date that are included in the accompanying consolidated statements of income for the reporting period is impracticable. Certain acquired receivables: The Bank identifies purchased financial assets with credit deterioration (“PCD”) loans as those that As of July 1, 2023 Particulars Wholesale Retail Total Total (In millions) Par value of PCD l Rs . 72,684.7 Rs . 43,961.6 Rs . 116,646.3 US $ 1,399.6 Allowance for credit losses on PCD l 36,487.3 2,927.9 39,415.2 472.9 Fair value of receivables at acquisition 36,197.4 41,003.0 77,200.4 926.3 Non-credit — 30.7 30.7 0.4 Contingencies: eHDFC group had contingent liabilities on account of disputed dues towards service tax and goods & service tax. The Bank recognizes a loss contingency in accordance with ASC 450 when it is probable that a liability has been incurred and the amount can be reasonably estimated. If both conditions are not met, the Bank discloses the contingency if there is at least a reasonable possibility that a loss may have been incurred. The contingent liabilities are in the nature of statutory demands and liabilities in dispute related to service tax and goods & service tax amounting to . million (US$ million). Separately accounted for transactions, including Following are the details of pre-exiting As of July 1, 2023 (In millions) Financial statement line items Cash and due from Banks Rs . 52,875.3 US$ 634.4 Investments, available for sale, at market 18,407.5 220.9 Accrued expenses and other liabilities (5,777.5 ) (69.3 ) Other assets 3,807.3 45.7 Net Assets R s . 69,312.6 US$ 831.7 The pre-existing Investment in the Bank by eHDFC eHDFC held a 20.8% equity interest in the Bank. Upon the acquisition of eHDFC by the Bank, this equity interest was cancelled through a share cancellation process, effectively eliminating the shares that eHDFC held in the Bank. Acquisition cost Acquisition related cost amounts to comprises of expenses recognized separately from the acquisition of assets and assumptions of liabilities in the business combination, the same is recognized as an expense in “Non-interest

Cash and due from banks, and re

Cash and due from banks, and restricted cash	12 Months Ended
	Mar. 31, 2024
Cash and due from banks, and restricted cash	4. Cash and due from banks, and restricted cash The Bank is required to maintain a specific percentage of its demand and time liabilities by way of a balance in a current account with the RBI. This is to maintain the solvency of the banking system. As prescribed by the RBI, the cash reserve ratio has to be maintained on an average basis for a two-week period. The average balance maintained for such two-week period should not fall below the prescribed threshold limit. Non-maintenance of the requisite balance is subject to levy of penalty. The Bank has classified the cash reserve maintained with the RBI as restricted cash or restricted cash equivalents (restricted cash). The cash and due from banks, and restricted cash consist of restricted cash of Rs. 902,006.6 million and Rs. 1,182,004.6 million (US$ 14,182.9 million) as of March 31, 2023 and March 31, 2024, respectively.

Investments

Investments	12 Months Ended
	Mar. 31, 2024
Held for Trading
Investments	5. Investments, held for trading The portfolio of trading securities as of March 31, 2023 and March 31, 2024 was as follows: As of March 31, 2023 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (In millions) Government of India securities Rs. 106,952.3 Rs. 103.6 Rs. 23.2 Rs. 107,032.7 Other corporate/financial institution securities 20,361.5 19.0 2.5 20,378.0 Total debt securities Rs. 127,313.8 Rs. 122.6 Rs. 25.7 Rs. 127,410.7 Other securities (including mutual fund units) 8,166.4 254.0 —  8,420.4 Total Rs. 135,480.2 Rs. 376.6 Rs. 25.7 Rs. 135,831.1 As of March 31, 2024 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (In millions) Government of India securities Rs. 71,673.0 Rs. 58.8 Rs. —  Rs. 71,731.8 Other corporate/financial institution securities 31,833.9 77.3 205.0 31,706.2 Total debt securities Rs. 103,506.9 Rs. 136.1 Rs. 205.0 Rs. 103,438.0 Other securities (including mutual fund units) 289,321.4 75,918.2 7,432.3 357,807.3 Total Rs. 392,828.3 Rs. 76,054.3 Rs. 7,637.3 Rs. 461,245.3 Total US$ 4,713.5 US$ 912.6 US$ 91.6 US$ 5,534.5
Available-for-Sale Debt Securities
Investments	6. Investments, AFS debt securities The portfolio of AFS debt securities as of March 31, 2023 and March 31, 2024 was As of March 31, 2023 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (In millions) Government of India securities Rs. 3,860,431.8 Rs. 4,656.4 Rs. 80,344.5 Rs. 3,784,743.7 State government securities 428,980.9 1,322.5 15,604.8 414,698.6 Government securities outside India 819.0 —  21.8 797.2 Credit substitutes (see note 8 511,161.4 505.4 8,479.0 503,187.8 Other corporate/financial institution bonds 27,521.4 13.4 571.3 26,963.5 Debt securities, other than asset and mortgage-backed securities 4,828,914.5 6,497.7 105,021.4 4,730,390.8 Mortgage-backed securities 19.3 —  1.8 17.5 Asset-backed securities 150,271.9 55.2 1,891.4 148,435.7 Total Rs. 4,979,205.7 Rs. 6,552.9 Rs. 106,914.6 Rs. 4,878,844.0 Securities with gross unrealized losses Rs. 3,220,573.8 Securities with gross unrealized gains 1,658,270.2 Rs. 4,878,844.0 As of March 31, 2024 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (In millions) Government of India securities Rs. 6,105,313.9 Rs. 41,090.5 Rs. 52,213.3 Rs. 6,094,191.1 State government securities 1,188,315.0 7,600.4 12,234.4 1,183,681.0 Government securities outside India 3,556.3 3.9 18.4 3,541.8 Credit substitutes (see note 8 133,197.8 321.7 2,032.6 131,486.9 Other corporate/financial institution bonds 736,923.7 16,136.6 9,022.2 744,038.1 Debt securities, other than asset and mortgage-backed securities 8,167,306.7 65,153.1 75,520.9 8,156,938.9 Mortgage-backed securities 78.1 2.3 1.2 79.2 Asset-backed securities 138,775.7 335.6 642.3 138,469.0 Total Rs. 8,306,160.5 Rs. 65,491.0 Rs. 76,164.4 Rs. 8,295,487.1 Total US$ 99,666.0 US$ 785.8 US$ 913.9 US$ 99,537.9 Securities with gross unrealized losses Rs. 3,706,475.3 Securities with gross unrealized gains 4,589,011.8 Rs. 8,295,487.1 US$ 99,537.9 AFS investments of Rs. 4,199,442.3 million and Rs. 6,340,926.3 million (US$ 76,085 million) as of March 31, 2023 and March 31, 2024, respectively, are eligible towards the Bank’s statutory liquidity reserve requirements. These balances are subject to withdrawal and usage restrictions towards the reserve requirements, but may be freely traded by the Bank. Of these investments, Rs. 2,070,953.6 million as of March 31, 2023 and Rs. 1,792,147.6 Amortized cost is net of Rs.70.9 million and nil as allowance for credit losses as for the fiscal years ended March 31, 2023 and March 31, 2024, respectively. The below table presents the gross unrealized losses and the associated fair value of AFS debt securities and whether these securities have had gross unrealized losses for less than 12 months or 12 months or greater as of March 31, 2023: As of March 31, 2023 Less Than 12 Months 12 Months or Greater Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses (In millions) Government of India securities Rs.  1,038,004.8 Rs.  12,622.5 Rs.  1,266,775.4 Rs.  67,722.0 Rs.  2,304,780.2 Rs. 80,344.5 State government securities 75,707.7 1,923.6 270,099.2 13,681.2 345,806.9 15,604.8 Government securities outside India 797.2 21.8 —  —  797.2 21.8 Credit substitutes (see note 8 254,023.6 3,771.0 152,702.6 4,708.0 406,726.2 8,479.0 Other corporate/financial institution bonds 21,596.9 443.0 4,205.1 128.3 25,802.0 571.3 Debt securities, other than asset- and mortgage-backed securities 1,390,130.2 18,781.9 1,693,782.3 86,239.5 3,083,912.5 105,021.4 Mortgage-backed securities —  —  17.5 1.8 17.5 1.8 Asset-backed securities 110,545.7 1,077.3 26,098.1 814.1 136,643.8 1,891.4 Total Rs. 1,500,675.9 Rs. 19,859.2 Rs. 1,719,897.9 Rs. 87,055.4 Rs. 3,220,573.8 Rs.  106,914.6 The below table presents the gross unrealized losses and the associated fair value of AFS debt securities and whether these securities have had gross unrealized losses for less than 12 months or 12 months or greater as of March 31, 2024: As of March 31, 2024 Less Than 12 Months 12 Months or Greater Total  Fair Value  Unrealized Losses  Fair Value  Unrealized Losses  Fair Value   Unrealized  Losses (In millions) Government of India securities Rs. 566,117.5 Rs. 177.4 Rs. 2,179,342.3 Rs. 52,035.9 Rs. 2,745,459.8 Rs. 52,213.3 State government securities 103,876.2 199.2 440,474.4 12,035.2 544,350.6 12,234.4 Government securities outside India —  —  814.3 18.4 814.3 18.4 Credit substitutes (see note 8 5,745.3 293.3 97,997.4 1,739.3 103,742.7 2,032.6 Other corporate/financial institution bonds 12,899.6 165.7 237,927.5 8,856.5 250,827.1 9,022.2 Debt securities, other than asset- and mortgage-backed securities 688,638.6 835.6 2,956,555.9 74,685.3 3,645,194.5 75,520.9 Mortgage-backed securities —  —  13.5 1.2 13.5 1.2 Asset-backed securities —  —  61,267.3 642.3 61,267.3 642.3 Total Rs.  688,638.6 Rs.  835.6 Rs.  3,017,836.7 Rs.  75,328.8 Rs.  3,706,475.3 Rs.  76,164.4 Total US$ 8,263.0 US$ 10.0 US$ 36,211.1 US$ 903.9 US$ 44,474.1 US$ 913.9 As of March 31, 2024, there were 344 AFS investments in Government of India securities, State government securities and Government securities outside India with unrealized losses totalling Rs. Allowances for AFS debt securities as of March 31, 2023 are as follows: As of March 31, 2023 Allowance for credit losses, beginning of the period Write-offs Addition/ allowance for credit losses Allowance for credit losses, end of (In millions) Credit substitutes Rs. —  Rs. —  Rs. 70.9 Rs. 70.9 Other corporate/financial institution bonds —  —  —  —  Total Rs. —  Rs. —  Rs. 70.9 Rs. 70.9 Allowances for AFS debt securities as of March 31, 2024 are as follows: As of March 31, 2024 Allowance for the period Write-offs Addition/ allowance for credit losses Allowance for (In millions) Credit substitutes Rs. 70.9 Rs. —  Rs. (70.9 ) Rs. —  Other corporate/financial institution bonds —  —  —  —  Total Rs. 70.9 Rs. —  Rs. (70.9 ) Rs. —  Total US$  0.9 US$  —  US$  (0.9 ) US$  —  Credit Quality Indicators The Bank monitors the credit quality of its investment securities through various risk management procedures, including the The contractual residual maturity As of March 31, 2024 Amortized Cost Fair Value Fair Value (In millions) Within one year Rs.  1,216,195.2 Rs.  1,213,814.5 US$ 14,564.6 Over one year through five years 1,704,481.9 1,693,976.3 20,326.1 Over five years through ten years 2,910,153.3 2,895,370.6 34,741.7 Over ten years 2,336,476.3 2,353,777.5 28,243.1 Total Rs.  8,167,306.7 Rs.  8,156,938.9 US$  97,875.5 The contractual residual maturity of AFS mortgage-backed and asset-backed debt securities as of March 31, 2024 is set out below: As of March 31, 2024 Amortized Cost Fair Value Fair Value (In millions) Within one year Rs.     61,860.3 Rs.     61,602.9 US$ 739.2 Over one year through five years 76,625.4 76,564.7 918.7 Over five years through ten years 315.6 326.2 3.9 Over ten years 52.5 54.4 0.6 Total Rs.  138,853.8 Rs.  138,548.2 US$  1,662.4 Gross realized gains and gross realized losses from sale of AFS debt securities and dividends and interest on such securities are set out below: Fiscal year ended March 31, 2022 2023 2024 2024 (In millions) Gross realized gains on sale Rs. 18,604.5 Rs. 259.1 Rs. 3,592.4 US$ 43.1 Gross realized losses on sale (1,858.7 ) (979.4 ) (2,765.7 ) (33.2 ) Realized gains/ (losses), net 16,745.8 (720.3 ) 826.7 9.9 Dividends and interest 240,943.0 304,566.7 516,550.0 6,198.1 Total Rs. 257,688.8 Rs. 303,846.4 Rs. 517,376.7 US$ 6,208.0
Held-to-maturity Securities
Investments	7. Investments, held to maturity There were no HTM securities as of March 31, 2023 and March 31, 2024.

Credit substitutes

Credit substitutes	12 Months Ended
	Mar. 31, 2024
Credit substitutes	8. Credit substitutes Credit substitutes consist of securities that the Bank invests in as part of an overall extension of credit to certain customers. Such securities share many of the risk and reward characteristics of loans and are managed by the Bank together with other credit facilities extended to the same customers. The fair value of credit substitutes by type of instrument as of March 31, 2023 and March 31, 2024 were as follows: As of March 31, 2023 2024 Amortized Cost Fair Value Amortized Cost Fair Value (In millions) Available for sale credit substitute debt securities: Debentures Rs. 510,880.4 Rs. 503,187.6 Rs. 132,926.5 Rs. 131,458.6 Preference shares 281.0 0.2 271.3 28.3 Commercial paper —  —  —  —  Total Rs. 511,161.4 Rs. 503,187.8 Rs. 133,197.8 Rs. 131,486.9 US$ 1,598.2 US$ 1,577.7 The fair value of credit substitutes by the As of March 31, 2023 2024 2024 (In millions) Pass Rs. 503,187.8 Rs. 131,486.9 US$ 1,577.7 Non-performing—gross balance —  —  —  Less: Non-performing losses —  —  —  Non-performing credit substitutes, net —  —  —  Total credit substitutes, net Rs. 503,187.8 Rs. 131,486.9 US$ 1,577.7 The following table provides information on non-performing credit substitutes as of March 31, 2023 and As of March 31, 2023 2024 2024 (In millions) Gross non-performing credit substitutes Rs  —  Rs  —  US$  —  Gross non-performing credit substitutes by industry Rs.  —  Rs.  —  US$  —  Average non-performing credit substitutes Rs.  —  Rs.  —  US$  —  Interest income recognized on non-performing credit substitutes Rs.  —  Rs.  —  US$  —  As of March 31, 2024, the Bank has no additional funds committed to borrowers whose credit substitutes

Repurchase and resell agreement

Repurchase and resell agreements	12 Months Ended
	Mar. 31, 2024
Repurchase and resell agreements	9. Repurchase and resell agreements Securities sold under agreements to repurchase (“repos”) and securities purchased under agreements to resell (“reverse repos”) generally do not constitute a sale for accounting purposes of the underlying securities, and so are treated as collateralized transactions. There were no such transactions accounted for as sales during the fiscal years ended March 31, 2022, March 31, 2023 and March 31, 2024. Interest paid or received on all repo and reverse repo transactions is recorded in Interest expense or Interest revenue at the contractually specified rate. a. Securities purchased under agreements to resell Securities purchased under agreements to resell are classified separately from investments and generally mature within 14 days of the transaction date. Such resell transactions are recorded at the amount of cash advanced on the transaction. Resell transactions outstanding as of March 31, 2023 and March 31, 2024 were Rs. 455,275.4 million and Rs. 34,178.3 million (US$ 410.1 million), respectively (see note 2 5 b. Securities sold under repurchase agreements Securities sold under agreements to repurchase are classified separately under liabilities and generally mature within 14 days of the transaction date. Such repurchase transactions are recorded at the amount of cash received on the transaction. Repurchase transactions outstanding as of March 31, 2023 and March 31, 2024 were nil and Rs. 56,541 million (US$ 678.4 million), 5

Loans

Loans	12 Months Ended
	Mar. 31, 2024
Loans	10. Loans Loan balances included Rs. 1,927,514.2 million and Rs. 2,288,842.6 million (US$ 27,463.9 million) as of March 31, 2023 and March 31, 2024, respectively, which have been provided as collateral for borrowings and are therefore restricted. Loans by facility as of March 31, 2023 and March 31, 2024 were as follows: As of March 31, 2023 2024 2024 (In millions) Retail loans: Auto loans Rs.  1,221,097.6 Rs.  1,378,523.1 US$ 16,541.0 Personal loans/Credit cards 2,782,828.5 3,119,246.7 37,428.0 Retail business banking 3,378,625.2 4,207,836.2 50,490.0 Commercial vehicle and construction equipment finance 1,285,887.8 1,619,602.9 19,433.7 Housing loans 1,020,901.6 6,993,168.0 83,911.3 Other retail loans 1,817,239.6 2,272,031.2 27,262.1 Subtotal Rs.  11,506,580.3 Rs.  19,590,408.1 US$ 235,066.1 Wholesale loans Rs.  5,911,512.1 Rs.  7,202,639.3 US$ 86,424.7 Gross loans 17,418,092.4 26,793,047.4 321,490.8 Less: Allowance for credit losses 365,164.5 457,346.5 5,487.7 Total Rs.  17,052,927.9 Rs.  26,335,700.9 US$  316,003.1 Loans, other than crop-related agricultural loans, are generally placed on non-accrual status and considered non-performing if principal or interest payments become 90 days past due and/or management deems the collectability of the principal and/or interest to be doubtful. Crop-related agricultural loans are generally placed on non-accrual status and considered non-performing if principal or interest payments become 366 days past due and/or management deems the collectability of the principal and/or interest to be doubtful. Loans are returned to accrual status when the principal and interest amounts contractually due are brought current. The maturity of gross loans as of March 31, 2024 is set out below: As of March 31, 2024 Wholesale loans Retail loans Total (In millions) Maturity profile of loans: Within one year Rs.  2,011,692.4 Rs.  4,191,712.5 Rs.  6,203,404.9 Over one year through five years 3,675,651.9 9,992,377.8 13,668,029.7 Over five years 1,515,295.0 5,406,317.8 6,921,612.8 Total Rs.  7,202,639.3 Rs.  19,590,408.1 Rs.  26,793,047.4 Total US$ 86,424.7 US$ 235,066.1 US$ 321,490.8 The followi ng analysis a As of March 31, 2023 31-90 days Non-accrual/ Current (1), (2) Total Finance on non-accrual (In millions) Retail Loans Auto loans Rs.  5,738.3 Rs.  15,941.6 Rs. 1,199,417.7 Rs.  1,221,097.6 Rs.  15,941.6 Personal loans/Credit card 20,871.1 22,770.1 2,739,187.3 2,782,828.5 22,770.1 Retail business banking 21,241.0 43,937.8 3,313,446.4 3,378,625.2 43,937.8 Commercial vehicle and construction equipment finance 15,089.3 21,823.8 1,248,974.7 1,285,887.8 21,823.8 Housing loans 3,916.0 5,900.3 1,011,085.3 1,020,901.6 5,900.3 Other retail 30,007.7 56,822.9 1,730,409.0 1,817,239.6 56,822.9 Wholesale loans 3,905.0 33,512.3 5,874,094.8 5,911,512.1 33,512.3 Total Rs.  100,768.4 Rs.  200,708.8 Rs.  17,116,615.2 Rs.  17,418,092.4 Rs.  200,708.8 (1) Loans up to 30 days past due are considered current. (2) Includes crop-related agricultural loans with days past due less than 366 as they are not considered as non-performing of Rs. 31.8 billion. As of March 31, 2024 31-90 days Non-accrual/ Current (1),(2) Total Finance (In millions) Retail Loans Auto loans Rs.  6,083.8 Rs.  14,998.0 Rs.  1,357,441.3 Rs.  1,378,523.1 Rs.  14,998.0 Personal loans/Credit card 24,446.2 25,466.5 3,069,334.0 3,119,246.7 25,466.5 Retail business banking 12,571.8 53,355.4 4,141,909.0 4,207,836.2 53,355.4 Commercial vehicle and construction equipment finance 19,351.4 21,563.6 1,578,687.9 1,619,602.9 21,563.6 Housing loans 37,025.6 43,712.7 6,912,429.7 6,993,168.0 43,712.7 Other retail 26,479.0 61,520.0 2,184,032.2 2,272,031.2 61,520.0 Wholesale loans 35,202.1 106,827.7 7,060,609.5 7,202,639.3 106,827.7 Total Rs.  161,159.9 Rs.  327,443.9 Rs.  26,304,443.6 Rs.  26,793,047.4 Rs.  327,443.9 Total US$ 1,933.8 US$ 3,929.0 US$ 315,628.0 US$ 321,490.8 US$ 3,929.0 (1) Loans up to 30 days past due are considered current. (2) Includes crop-related agricultural loans with days past due less than 366 as they are not considered as non-performing of Rs. 35.4 billion. From fiscal year 2020 the Bank has implemented the packages announced by RBI on account of the COVID-19 pandemic which grants temporary extensions in repayment obligations to the borrowers without any interest or financial concessions. While the moratorium allowed customers (from March to August 2020) to temporarily freeze loan repayments, the loan restructuring packages eased the burden of monthly repayments. The total balance outstanding of loan facilities restructured was Rs. 86.1 billion as of March 31, 2023 and Rs. 72.9 billion (US$ 0.9 billion) as of March 31, 2024. These restructured facilities as of March 31, 2023 included retail loans and wholesale loans of Rs. 81.4 billion and Rs. 4.7 billion, respectively, and as of March 31, 2024 included retail loans and wholesale loans of Rs. 68.6 billion and Rs. 4.3 billion respectively. As stipulated by regulatory guidance, the Bank does not place loans with deferrals granted due to COVID-19 on nonaccrual status where such loans are not otherwise reportable as nonaccrual and thus considered in the allowance for loan losses. For retail loans, the policy and approval processes are designed to account for the Bank’s high volumes of relatively homogeneous, small value transactions in retail loans. There are product programs for each of these products, which define the target markets, credit philosophy and process, detailed underwriting criteria for evaluating individual credits, exception reporting systems and individual loan exposure caps. The quantitative parameters considered include income, residence stability and the nature of the employment/business, while the qualitative parameters include accessibility, contractibility and profile. The credit policies/product programs are based on a statistical analysis of the Bank’s experience and industry data, in combination with the judgment of the Bank’s senior officers. The Bank regularly mines data on its borrower account behavior as well as static data to monitor the portfolio performance of each product segment and uses these as inputs for revising the Bank’s product programs, target market definitions and credit assessment criteria to meet the Bank’s twin objectives of combining volume growth and maintenance of asset quality. As an integral part of the credit process, the Bank has a credit rating model for its wholesale and retail credit segments. The Bank monitors credit quality within its segments based on primary credit quality indicators. This internal grading is updated at least annually. Disbursals under one-time restructurings are also included. The amount of purchased financing receivables outstanding as of March 31, 2023 and March 31, 2024 was Rs. 1,024,684.4 million and Rs. 2,600.7 million, respectively. The following table provides information on primary credit quality indicators as of March 31, 2023: Term loans by origination Credit quality indicators-Internally Prior 2019 2020 2021 2022 2023 Revolving Revolving Total (In millions) Auto loans Performing Rs. 14,387.2 Rs. 37,425.2 Rs. 90,148.4 Rs. 160,443.6 Rs. 308,076.9 Rs. 525,693.8 Rs. 68,980.9 Rs. —  Rs. 1,205,156.0 Non-performing 1,129.9 2,324.4 3,858.8 2,875.4 1,990.0 748.9 3,014.2 —  15,941.6 Subtotal Rs. 15,517.1 Rs. 39,749.6 Rs. 94,007.2 Rs. 163,319.0 Rs. 310,066.9 Rs. 526,442.7 Rs. 71,995.1 Rs. —  Rs. 1,221,097.6 Personal loans/Credit card Performing Rs. 2,431.4 Rs. 20,673.2 Rs. 86,038.7 Rs. 155,911.2 Rs. 490,598.8 Rs. 1,206,873.5 Rs. 482,500.3 Rs. 315,031.3 Rs. 2,760,058.4 Non-performing 346.6 1,440.1 3,511.1 2,518.9 3,411.9 2,254.3 8,869.6 417.6 22,770.1 Subtotal Rs. 2,778.0 Rs. 22,113.3 Rs. 89,549.8 Rs. 158,430.1 Rs. 494,010.7 Rs. 1,209,127.8 Rs. 491,369.9 Rs. 315,448.9 Rs. 2,782,828.5 Retail business banking Performing Rs. 75,583.1 Rs. 58,914.7 Rs. 94,372.2 Rs. 185,698.6 Rs. 412,305.0 Rs. 600,147.3 Rs. 1,907,666.5 Rs. —  Rs. 3,334,687.4 Non-performing 4,851.6 2,996.8 2,847.2 4,136.3 1,558.3 218.4 27,329.2 —  43,937.8 Subtotal Rs. 80,434.7 Rs. 61,911.5 Rs. 97,219.4 Rs. 189,834.9 Rs. 413,863.3 Rs. 600,365.7 Rs. 1,934,995.7 Rs. —  Rs. 3,378,625.2 Commercial vehicle and construction equipment finance Performing Rs. 3,981.3 Rs. 19,618.5 Rs. 49,030.6 Rs. 92,773.8 Rs. 277,461.6 Rs. 629,405.5 Rs. 191,792.7 Rs. —  Rs. 1,264,064.0 Non-performing 398.0 2,582.1 4,491.4 4,696.0 3,053.3 763.8 5,839.2 —  21,823.8 Subtotal Rs. 4,379.3 Rs. 22,200.6 Rs. 53,522.0 Rs. 97,469.8 Rs. 280,514.9 Rs. 630,169.3 Rs. 197,631.9 Rs. —  Rs. 1,285,887.8 Housing loans Performing Rs. 394,712.3 Rs. 160,447.9 Rs. 143,037.0 Rs. 120,214.8 Rs. 167,130.4 Rs. 29,458.9 Rs. —  Rs. —  Rs. 1,015,001.3 Non-performing 4,031.5 1,206.1 358.8 180.2 123.3 0.4 —  —  5,900.3 Subtotal Rs. 398,743.8 Rs. 161,654.0 Rs. 143,395.8 Rs. 120,395.0 Rs. 167,253.7 Rs. 29,459.3 Rs. —  Rs. —  Rs. 1,020,901.6 Other retail loans Performing Rs. 5,564.3 Rs. 10,063.3 Rs. 18,382.0 Rs. 42,416.7 Rs. 150,038.1 Rs. 603,873.8 Rs. 930,078.5 Rs. —  Rs. 1,760,416.7 Non-performing 3,000.6 3,254.9 11,339.9 3,171.9 2,261.4 971.8 32,822.4 —  56,822.9 Subtotal Rs. 8,564.9 Rs. 13,318.2 Rs. 29,721.9 Rs. 45,588.6 Rs. 152,299.5 Rs. 604,845.6 Rs. 962,900.9 Rs. —  Rs. 1,817,239.6 Total Rs.  510,417.8 Rs.  320,947.2 Rs.  507,416.1 Rs.  775,037.4 Rs.  1,818,009.0 Rs.  3,600,410.4 Rs.  3,658,893.5 Rs.  315,448.9 Rs.  11,506,580.3 The following table provides information on primary cre dit Term loans by origination Credit quality Prior 2020 2021 2022 2023 2024 Revolving Revolving Total (In millions) Auto loans Performing Rs. 15,314.7 Rs. 40,203.8 Rs. 86,953.7 Rs. 198,895.3 Rs.  398,936.3 Rs. 540,605.2 Rs. 82,616.1 Rs. —  Rs.  1,363,525.1 Non-performing 1,771.7 1,908.9 1,908.6 2,729.8 3,204.6 779.7 2,694.7 —  14,998.0 Subtotal Rs. 17,086.4 Rs. 42,112.7 Rs. 88,862.3 Rs. 201,625.1 Rs. 402,140.9 Rs. 541,384.9 Rs. 85,310.8 Rs. —  Rs. 1,378,523.1 Write off 1,376.8 1,913.2 1,683.1 1,835.8 1,688.5 150.7 —  —  8,648.1 Personal loans/Credit card Performing Rs. 4,198.8 Rs. 28,112.1 Rs. 62,604.2 Rs. 237,689.5 Rs. 642,360.7 Rs. 1,192,606.3 Rs. 560,472.3 Rs. 365,736.3 Rs. 3,093,780.2 Non-performing 726.8 1,486.5 1,668.2 3,127.9 5,912.5 2,544.9 9,674.2 325.5 25,466.5 Subtotal Rs. 4,925.6 Rs. 29,598.6 Rs. 64,272.4 Rs. 240,817.4 Rs. 648,273.2 Rs. 1,195,151.2 Rs. 570,146.5 Rs. 366,061.8 Rs. 3,119,246.7 Write off 1,681.8 4,635.9 3,526.2 10,050.8 17,073.2 2,838.5 21,307.8 13,679.9 74,794.1 Retail business banking Performing Rs. 88,129.0 Rs. 62,739.9 Rs. 108,288.3 Rs. 317,668.3 Rs. 527,853.5 Rs. 701,602.8 Rs.  2,348,199.0 Rs. —  Rs. 4,154,480.8 Non-performing 8,083.4 1,933.2 3,454.1 2,118.8 851.1 135.0 36,779.8 —  53,355.4 Subtotal Rs. 96,212.4 Rs. 64,673.1 Rs. 111,742.4 Rs. 319,787.1 Rs. 528,704.6 Rs. 701,737.8 Rs. 2,384,978.8 Rs. —  Rs. 4,207,836.2 Write off 1,163.3 298.8 138.6 19.7 0.2 —  9.5 —  1,630.1 Commercial vehicle and construction equipment finance Performing Rs. 9,984.2 Rs. 16,357.7 Rs. 33,797.5 Rs. 156,354.0 Rs. 456,722.6 Rs. 722,457.1 Rs. 202,366.2 Rs. —  Rs. 1,598,039.3 Non-performing 2,628.4 1,628.6 2,641.9 3,588.5 4,859.6 1,204.9 5,011.7 —  21,563.6 Subtotal Rs. 12,612.6 Rs. 17,986.3 Rs. 36,439.4 Rs. 159,942.5 Rs. 461,582.2 Rs. 723,662.0 Rs. 207,377.9 Rs. —  Rs. 1,619,602.9 Write off 1,547.1 2,379.5 1,597.7 2,231.2 1,935.0 104.3 1.3 —  9,796.1 Housing loans Performing Rs. 1,351,187.2 Rs. 565,617.9 Rs. 735,921.2 Rs. 1,170,433.9 Rs. 1,476,703.5 Rs. 1,649,591.6 Rs. —  Rs. —  Rs. 6,949,455.3 Non-performing 22,222.3 6,506.8 5,569.9 4,869.8 3,804.6 739.3 —  —  43,712.7 Subtotal Rs. 1,373,409.5 Rs. 572,124.7 Rs. 741,491.1 Rs. 1,175,303.7 Rs. 1,480,508.1 Rs. 1,650,330.9 Rs. —  Rs. —  Rs. 6,993,168.0 Write off 11,133.4 759.5 105.6 7.5 7.2 —  —  —  12,013.2 Other retail loans Performing Rs. 9,040.5 Rs. 9,538.8 Rs. 18,091.4 Rs. 53,746.1 Rs. 200,858.5 Rs. 721,107.1 Rs. 1,198,128.8 Rs. —  Rs. 2,210,511.2 Non-performing 3,885.2 1,892.0 2,161.5 2,405.6 4,053.3 3,129.2 43,993.2 —  61,520.0 Subtotal Rs. 12,925.7 Rs. 11,430.8 Rs. 20,252.9 Rs. 56,151.7 Rs. 204,911.8 Rs. 724,236.3 Rs. 1,242,122.0 Rs. —  Rs. 2,272,031.2 Write off 1,857.3 4,453.7 1,567.6 2,088.9 3,505.0 538.8 4,519.1 —  18,530.4 Total Rs.   1,517,172.2 Rs.   737,926.2 Rs. 1,063,060.5 Rs.   2,153,627.5 Rs. 3,726,120.8 Rs.   5,536,503.1 Rs. 4,489,936.0 Rs.   366,061.8 Rs. 19,590,408.1 Total US$ 18,204.6 US$ 8,854.4 US$ 12,755.7 US$ 25,841.5 US$ 44,709.9 US$ 66,432.7 US$ 53,874.9 US$ 4,392.4 US$ 235,066.1 Total (Write Off) Rs. 18,759.7 Rs. 14,440.6 Rs. 8,618.8 Rs. 16,233.9 Rs. 24,209.1 Rs. 3,632.3 Rs. 25,837.7 Rs. 13,679.9 Rs. 125,412.0 Total (Write Off) US$ 225.1 US$ 173.3 US$ 103.4 US$ 194.8 US$ 290.5 US$ 43.6 US$ 310.0 US$ 164.1 US$ 1,504.8 Wholesale Loans The Bank has a process in place for grading each borrower according to its financial health and the performance of its business and each borrower is graded as pass/labeled/non-performing. Wholesale loans that are not non-performing are disclosed as pass or labeled and considered to be performing. Labeled loans are those with evidence of weakness where such exposures indicate deteriorating trends which if not corrected could adversely impact repayment of the obligations. The Bank’s model assesses the overall risk over four major categories: industry risk, business risk, management risk and financial risk. The inputs in each of the categories are combined to provide The following table provides information on primary credit quality indicators as of March 31, 2023. Term loans by origination Credit quality indicators-Internally Prior 2019 2020 2021 2022 2023 Revolving Total (In millions) Wholesale loans Pass Rs. 130,723.1 Rs. 135,400.3 Rs. 321,191.0 Rs. 708,309.0 Rs. 1,244,766.9 Rs. 1,471,254.9 Rs. 1,841,015.5 Rs. 5,852,660.7 Labeled 2,625.3 1,586.9 635.7 4,200.8 5,946.5 795.3 9,548.6 25,339.1 Non-performing 3,830.5 1,914.3 66.1 326.4 6,297.4 39.1 21,038.5 33,512.3 Total Rs. 137,178.9 Rs. 138,901.5 Rs. 321,892.8 Rs. 712,836.2 Rs. 1,257,010.8 Rs. 1,472,089.3 Rs. 1,871,602.6 Rs. 5,911,512.1 The following table provides information on primary credit quality indi Term loans by origination Credit quality Prior 2020 2021 2022 2023 2024 Revolving Total (In millions) Wholesale loans Pass Rs.  186,460.1 Rs.  264,241.1 Rs. 560,195.2 Rs.  957,023.5 Rs.  1,200,992.0 Rs.  2,071,787.5 Rs.  1,773,221.5 Rs.  7,013,920.9 Labeled 14,723.3 757.2 17,488.3 14,588.1 16,225.0 11,623.4 6,485.4 81,890.7 Non-performing 45,730.4 3,725.9 14,614.8 8,719.0 5,017.9 7,133.1 21,886.6 106,827.7 Total Rs.  246,913.8 Rs. 268,724.2 Rs.  592,298.3 Rs. 980,330.6 Rs. 1,222,234.9 Rs. 2,090,544.0 Rs. 1,801,593.5 Rs. 7,202,639.3 Total Write off Rs. 2,585.0 Rs. 264.3 Rs. —  Rs. —  Rs. 481.5 Rs. —  Rs. 244.4 Rs. 3,575.2 Total US$ 2,962.7 US$ 3,224.4 US$ 7,107.0 US$ 11,763.0 US$ 14,665.6 US$ 25,084.5 US$ 21,617.5 US$ 86,424.7 Total (Write Off) US$ 31.0 US$ 3.2 US$ —  US$ —  US$ 5.8 US$ —  US$ 2.9 US$ 42.9 Non-performing loans by industry as of March 31, 2023 and March 31, 2024 are as follows: As of March 31, 2023 (In millions) Gross non-performing loans by industry: — Consumer Loans Rs.  34,684.8 — Agri Production—Food 28,222.2 — Retail Trade 15,044.4 — Agri Allied 13,426.1 — Road Transportation 11,505.0 — Consumer services 10,031.1 — Others (none greater than 5% of non-performing loans) 87,795.2 Total Rs.  200,708.8 As of March 31, 2024 (In millions) Gross non-performing loans by industry: — Consumer Loans Rs.  68,976.4 US$ 827.7 — Real Estate & Property services 65,195.3 782.3 —Agri Production—Food 30,493.3 365.9 — Others (none greater than 5% of non-performing loans) 162,778.9 1,953.1 Total Rs.  327,443.9 US$  3,929.0 Summary information relating to interest income recognized on non-performing loans during the fiscal years ended March 31, 2022, March 31, 2023 and March 31, 2024 is as follows: Fiscal year ended March 31, 2022 2023 2024 2024 (In millions) Interest income recognized on non-performing loans Rs. 11,881.0 Rs. 7,738.0 Rs. 9,675.9 US$  116.1 A loan is collateral dependent when the borrower is experiencing financial difficulty and repayment of the loan is dependent on the sale or operation of the underlying collateral. Such loans are carried at fair Allowances for credit losses as of March 31, 2022 are as follows: Auto loans Personal Retail Commercial Housing Other Wholesale Total (In millions) Allowance for credit losses, beginning of the period Rs.  39,396.1 Rs.  110,081.0 Rs.  42,288.4 Rs. 26,356.7 Rs.  4,578.0 Rs.  49,229.2 Rs. 71,599.3 Rs.  343,528.7 Write-offs (19,376.9 ) (74,500.8 ) (3,027.7 ) (16,592.0 ) (601.6 ) (17,567.4 ) (2,351.4 ) (134,017.8 ) Net allowance for credit losses (*) 21,750.2 75,986.2 9,794.3 21,986.2 (1,284.2 ) 29,775.2 5,153.0 163,160.9 Allowance for credit losses, end of the period Rs.  41,769.4 Rs. 111,566.4 Rs. 49,055.0 Rs.  31,750.9 Rs. 2,692.2 Rs. 61,437.0 Rs.  74,400.9 Rs. 372,671.8 Allowance for credit losses: Individually evaluated allowance Rs. 18.4 Rs. 6.5 Rs. 2,651.4 Rs. 65.8 Rs. —  Rs. 92.3 Rs. 35,619.7 Rs. 38,454.1 Collectively evaluated allowance 41,751.0 111,559.9 46,403.6 31,685.1 2,692.2 61,344.7 38,781.2 334,217.7 Loans: Individually evaluated loans 31.5 29.4 2,651.4 66.3 —  126.6 41,832.9 44,738.1 Collectively evaluated loans 1,042,761.5 2,341,942.4 2,614,435.7 950,999.7 830,882.4 1,526,607.8 5,057,176.4 14,364,805.9 ( ) Net allowances for credit losses charged to expense does not include the recoveries against write-off cases amounting to Rs.36,181.4 million. Recoveries from retail loans is Rs.35,385.3 million and from wholesale loans is Rs.796.1 million. Allowances for credit losses as of March 31, 2023 are as follows: Auto loans Personal Retail Commercial Housing Other Wholesale Total (In millions) Allowance for credit losses, beginning of the period Rs.  41,769.4 Rs.  111,566.4 Rs.  49,055.0 Rs.  31,750.9 Rs.  2,692.2 Rs.  61,437.0 Rs.  74,400.9 Rs.  372,671.8 Write-offs (10,456.0 ) (88,744.9 ) (3,987.8 ) (15,270.1 ) (479.0 ) (15,769.9 ) (3,156.0 ) (137,863.7 ) Net allowance for credit losses (*) 2,522.1 76,812.9 18,907.6 14,649.8 1,056.7 26,345.3 (9,938.0 ) 130,356.4 Allowance for credit losses, end of the period Rs. 33,835.5 Rs. 99,634.4 Rs. 63,974.8 Rs. 31,130.6 Rs. 3,269.9 Rs. 72,012.4 Rs. 61,306.9 Rs. 365,164.5 Allowance for credit losses: Individually evaluated allowance Rs. 4.6 Rs. —  Rs. 2,320.3 Rs. 15.0 Rs. —  Rs. 92.1 Rs. 29,264.6 Rs. 31,696.6 Collectively evaluated allowance 33,830.9 99,634.4 61,654.5 31,115.6 3,269.9 71,920.3 32,042.3 333,467.9 Loans: Individually evaluated loans 16.4 0.8 2,782.0 290.8 —  92.3 33,879.5 37,061.8 Collectively evaluated loans 1,221,081.2 2,782,827.7 3,375,843.2 1,285,597.0 1,020,901.6 1,817,147.3 5,877,632.6 17,381,030.6 ( ) Net allowances for credit losses charged to expense does not include the recoveries against write-off cases amounting to Rs. 56,142.6 millio n Allowances for credit losses as of March 31, 2024 are as follows: Auto loans Personal Retail Commercial Housing Other Wholesale Total Total (In millions) Allowance for credit losses, beginning of the period Rs. 33,835.5 Rs. 99,634.4 Rs. 63,974.8 Rs. 31,130.6 Rs. 3,269.9 Rs. 72,012.4 Rs. 61,306.9 Rs. 365,164.5 US$ 4,381.6 Allowance for credit losses on PCD Loans at acquisition —  —  —  —  2,927.9 —  36,487.3 39,415.2 472.9 Write-offs (8,648.1 ) (74,794.1 ) (1,630.1 ) (9,796.1 ) (12,013.2 ) (18,530.4 ) (3,575.2 ) (128,987.2 ) (1,547.7) Net allowance for credit losses (*) 4,761.5 92,159.3 12,955.8 10,761.6 15,722.2 26,971.8 (18,421.8 ) 181,754.0 2,180.9 Allowance for credit losses, end of the period Rs. 29,948.9 Rs. 116,999.6 Rs. 75,300.5 Rs. 32,096.1 Rs. 9,906.8 Rs. 80,453.8 Rs. 112,640.8 Rs. 457,346.5 US$5,487.7 Allowance for credit losses: Individually evaluated allowance Rs. 8.0 Rs. 1.0 Rs. 2,498.3 Rs. 184.4 Rs. —  Rs. 156.8 Rs. 68,886.9 Rs. 71,735.4 US$ 860.7 Collectively evaluated allowance 29,940.9 116,998.6 72,802.2 31,911.7 9,906.8 80,297.0 43,753.9 385,611.1 4,627.0 Loans: Individually evaluated loans 8.0 1.0 2,924.9 184.4 —  156.8 107,439.4 110,714.5 1,328.4 Collectively evaluated loans 1,378,515.1 3,119,245.7 4,204,911.3 1,619,418.5 6,993,168.0 2,271,874.4 7,095,199.9 26,682,332.9 320,162.4 (*) Net allowances for credit losses charged to expense does not include the recoveries against The allowance for credit losses is assessed at each period end and the increase/(decrease), as the case may be, is recorded in the consolidated statement of income under allowance for credit losses net of recoveries against write-offs. Interest on loan s Fiscal year 2022 2023 2024 2024 (In millions) Wholesale loans Rs. 250,779.5 Rs. 363,842.1 Rs. 555,377.8 US$ 6,664.0 Retail loans 807,146.1 987,975.9 1,617,982.2 19,414.2 Other loans —  —  21,165.5 254.0 Total Rs. 1,057,925.6 Rs. 1,351,818.0 Rs. 2,194,525.5 US$ 26,332.2

Concentrations of credit risk

Concentrations of credit risk	12 Months Ended
	Mar. 31, 2024
Concentrations of credit risk	11. Concentrations of credit risk Concentrations of credit risk exist when changes in economic, industry or geographic factors similarly affect groups of counterparties whose aggregate credit exposure is material in relation to the Bank’s total credit exposure. The Bank manages its credit risk collectively for its loan portfolio and credit substitute securities as these instruments are invested in as part of an overall lending program for corporate customers; accordingly, information on concentrations of credit risk has been provided for these exposures together. In the case of wholesale loans, while the Bank generally lends on a cash-flow basis, it also requires collateral which consists of liens on inventory, receivables and other current assets, and in some cases, charges on fixed assets, such as property, movable assets (such as vehicles) and financial assets (such as marketable securities) from a large number of the Bank’s borrowers. The Bank’s retail loans are generally secured by a charge on the asset financed (vehicle loans, property loans and loans against gold and securities). Retail business banking loans are secured with current assets as well as immovable property and fixed assets in some cases. However, collateral securing each individual loan may not be adequate in relation to the value of the loan. If the customer fails to pay, the Bank would, as applicable, liquidate collateral and/or set off accounts. The maximum estimated loss that would be incurred under severe, hypothetical circumstances, for which the Bank believes the possibility is extremely remote, such as where the value of the Bank’s interests and any associated collateral declines to zero, without any consideration of recovery or offset is determined as the carrying values of the instruments as given in the below table. The Bank’s portfolio of loans, credit substitute securities and non- funded As of March 31, 2023 Category Gross loans Fair value of Non-funded Total % Consumer Loans Rs. 4,410,346.6 Rs. —  Rs. 2,550.8 Rs. 4,412,897.4 22.4 Retail Trade 973,274.3 —  36,013.4 1,009,287.7 5.1 Power 695,716.5 64,805.5 45,576.3 806,098.3 4.1 NBFC 690,783.9 91,595.9 15,995.5 798,375.3 4.1 Financial Institutions 659,117.5 72,068.3 4,435.4 735,621.2 3.7 Consumer Services 581,272.1 3,545.4 123,464.7 708,282.2 3.6 Food and Beverage 566,172.9 1,419.2 49,084.4 616,676.5 3.1 Road Transportation 568,414.2 —  12,512.4 580,926.6 3.0 Coal & Petroleum Products 353,329.8 115,279.8 102,771.3 571,380.9 2.9 Wholesale Trade—Non Industrial 530,057.5 1,988.8 31,887.0 563,933.3 2.9 Automobile & Auto Ancillary 483,658.4 17,656.8 38,921.4 540,236.6 2.7 Real Estate & Property Services 458,906.6 4,691.4 52,228.7 515,826.7 2.6 Wholesale Trade—Industrial 421,900.9 —  70,853.6 492,754.5 2.5 Infrastructure Development 284,690.7 15,220.2 170,452.2 470,363.1 2.4 Engineering 300,745.5 5,596.0 131,956.5 438,298.0 2.2 Agri—Allied 431,581.2 —  2,701.2 434,282.4 2.2 Iron and Steel 360,021.9 12,231.9 61,224.3 433,478.1 2.2 Textiles & Garments 390,883.0 4,984.5 34,729.1 430,596.6 2.2 Telecom 365,112.3 —  42,221.1 407,333.4 2.1 Agri Production—Food 401,720.3 —  1,040.5 402,760.8 2.0 Others (none greater than 2%) 3,490,386.3 92,104.1 719,829.4 4,302,319.8 22.0 Total Rs.  17,418,092.4 Rs.  503,187.8 Rs.  1,750,449.2 Rs.  19,671,729.4 100.0 As of March 31, 2024 Category Gross loans Fair value of Non-funded Total Total % (In millions, except percentages)    Consumer Loans Rs. 10,191,521.5 Rs. —  Rs. 468.1 Rs. 10,191,989.6 US$ 122,294.1 35.1 % NBFC 1,725,559.7 20,585.6 5,153.7 1,751,299.0 21,013.9 6.0 % Retail Trade 1,085,962.9 — 56,822.6 1,142,785.5 13,712.3 3.9 % Real Estate & Property Services 1,070,220.3 3,495.0 57,556.4 1,131,271.7 13,574.2 3.9 % Consumer Services 860,297.1 —  35,933.7 896,230.8 10,753.9 3.1 % Power 770,473.1 37,706.9 63,452.3 871,632.3 10,458.8 3.0 % Infrastructure Development 450,183.2 6,716.0 336,982.5 793,881.7 9,525.8 2.7 % Food and Beverage 712,895.6 1,405.1 59,163.2 773,463.9 9,280.8 2.7 % Road Transportation 741,738.6 — 11,160.3 752,898.9 9,034.1 2.6 % Others (none greater than 2%) 9,184,195.4 61,578.3 1,477,275.2 10,723,048.9 128,666.3 37.0 % Total Rs. 26,793,047.4 Rs.  131,486.9 Rs.  2,103,968.0 Rs.  29,028,502.3 US$ 348,314.2         100.0 % The Bank’s ten largest exposures as of March 31, 2023 and March 31, 2024, based on the As of March 31, 2023 Funded Non-Funded Total (In millions) Borrower 1 Rs.  284,002.5 Rs.  —  Rs.  284,002.5 Borrower 2 220,901.6 1,200.0 222,101.6 Borrower 3 205,801.0 —  205,801.0 Borrower 4 80,344.5 112,144.7 192,489.2 Borrower 5 185,299.0 —  185,299.0 Borrower 6 154,296.7 21,764.8 176,061.5 Borrower 7 155,565.7 60.0 155,625.7 Borrower 8 139,808.3 —  139,808.3 Borrower 9 121,560.0 6,030.3 127,590.3 Borrower 10 112,479.0 15,070.0 127,549.0 As of March 31, 2024 Funded Non-Funded Total Total (In millions) Borrower 1 Rs.  301,241.8 Rs.  —  Rs.  301,241.8 US$  3,614.6 Borrower 2 276,973.5 1,200.0 278,173.5 3,337.8 Borrower 3 220,801.0 —  220,801.0 2,649.4 Borrower 4 214,755.0 42.5 214,797.5 2,577.4 Borrower 5 212,970.4 —  212,970.4 2,555.4 Borrower 6 187,963.3 200.0 188,163.3 2,257.8 Borrower 7 175,000.0 28.1 175,028.1 2,100.2 Borrower 8 163,105.7 5,893.4 168,999.1 2,027.8 Borrower 9 47,933.7 112,605.5 160,539.2 1,926.3 Borrower 10 145,250.0 21.0 145,271.0 1,743.1

Property and equipment

Property and equipment	12 Months Ended
	Mar. 31, 2024
Property and equipment	12. Property and equipment Property and equipment by asset category As of March 31, 2023 2024 2024 (In millions) Land and premises Rs. 25,501.3 Rs.  64,357.6 US$  772.2 Software and systems 56,092.8 73,561.3 882.7 Equipment and furniture 132,553.5 172,031.8 2,064.2 Property and equipment, at cost 214,147.6 309,950.7 3,719.1 Less: Accumulated depreciation 126,577.9 162,920.3 1,954.9 Property and equipment, net Rs. 87,569.7 Rs.  147,030.4 US$  1,764.2 Depreciation and amortization charged for the fiscal years ended March 31, 2022, March 31, 2023 and March 31, 2024 was Rs. million, Rs. million and Rs. million (US$ million), respectively.

Goodwill and Intangible assets

Goodwill and Intangible assets	12 Months Ended
	Mar. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible assets	13. Goodwill and Intangible assets Goodwill arising from a business combination is not amortized but is tested for impairment. The Bank tests goodwill of each separate reporting unit by initially qualitatively assessing whether events and circumstances indicate that it is more likely than not that a reporting unit’s fair value is less than its carrying amount. If such assessment indicates fair value is not less than the carrying value, the reporting unit is deemed not to be impaired and no further analysis is required. If it is more likely than not that fair value of the reporting unit is below its carrying value, a quantitative test is then performed. We examined the million) as on March 31, 2024.” The following table represents the changes in the carrying amount of goodwill reported in the consolidated balance sheets for the year ended March 31, 2023 and March 31, 2024: As of March 31, 2024 Retail Banking Wholesale Treasury Insurance Others Total Total (In millions) Balance as at March 31, 2022 Rs.74,937.9 Rs.—  Rs.—  Rs.   —  Rs.    —  Rs.74,937.9 US$ 899.3 Balance as at March 31, 2023 74,937.9 —  —  —  —  74,937.9 899.3 Goodwill on acquisition during the year 368,079.6 71,617.3 —  959,080.0 229,371.6 1,628,148.5 19,536.2 Less: Goodwill Derecognised on disposal during the year —  —  —  —  73,576.1 .73,576.1 882.9 Balance at March 31, 2024 Rs.443,017.5 Rs.71,617.3 Rs.—  Rs.959,080.0 Rs.155,795.5 Rs.1,629,510.3 US$ 19,552.6 Intangible assets, net, consists of the following: As of, July 1, 2023 March 31, 2024 March 31, 2024 (Rs. in millions) Brand Rs.  750,758.2 Rs.  742,230.7 US$  8,906.1 Investment management contract 369,785.6 369,785.6 4,437.1 Value of business acquired 221,738.5 221,738.5 2,660.6 Distribution network 59,543.2 50,570.8 606.9 Customer Relationship 29,874.9 29,874.9 358.4 Transferable Development Rights 3,117.7 3,117.7 37.4 Intangible Assets Rs. 1,434,818.1 Rs. 1,417,318.2 US$  17,006.5 Less: Accumulated amortization — 21,201.0 254.4 Total intangible assets, net Rs. 1,434,818.1 Rs. 1,396,117.2 US$  16,752.1 (*) All the above intangible assets excluding Brand and Investment Management Contract are subject to amortization. Further, intangible assets include Brand amounting to Rs. 8,527.5 million (US $ 102.3 million million) pertaining to HDFC Credila Financial Services Limited which is classified as held for sale as on date of acquisition. These have been derecognized following the divestment of stake on March 19, 2024. Amortization expense related to intangible assets was Rs. 21,201.0 million for the year ended March 31, 2024. These amounts are included in Non-Interest Expense - Amortization of intangible assets in the consolidated financial statements. At March 31, 2024, the expected future amortization of finite-lived intangible assets is as follows: As of March 31, 2024 (in millions) Fiscal year ending March 31: 2025 Rs.  21,827.1 US$  261.9 2026 19,843.8 238.1 2027 18,138.2 217.6 2028 16,298.0 195.6 2029 14,661.8 175.9 Thereafter  193,332.0  2,319.8

Other assets

Other assets	12 Months Ended
	Mar. 31, 2024
Other assets	14. Other assets Other assets include the following: As of March 31, 2023 2024 2024 (In millions) Security deposits for leased property Rs. 6,461.8 Rs. 9,678.4 US$ 116.1 Sundry accounts receivable 84,217.8 129,187.8 1,550.1 Advance tax (net of provision for taxes) 52,006.4 173,281.9 2,079.2 Advances 14,724.3 51,036.8 612.4 Prepaid expenses 4,757.4 9,484.0 113.8 Deposits/Margins paid 14,959.0 48,100.4 577.2 Derivatives (refer to note 2 5 121,749.4 109,038.5 1,308.4 Placements with financial institutions 970,063.2 1,330,263.5 15,961.9 Receivable on account of trade date 8,442.2 295.5 3.5 ROU assets 89,989.3 121,302.5 1,455.5 Others (*) 129,380.8 546,542.0 6,558.0 Total Rs. 1,496,751.6 Rs. 2,528,211.3 US$ 30,336.1 ( ) Others include equity securities and affiliates with carrying value amounting to Rs. 22,103.4 million and Rs. 317,593.5 million as of March 31, 2023 and March 31, 2024, respectively. Equity securities include non-marketable equity securities carried at cost of Rs. 2,640.8 million and Rs. 14,646.7 million as of March 31, 2023 and March 31, 2024, respectively. Unrealized gain/(loss) recognized in non-interest revenue–other, net amount to Rs. 7,160.1 million and Rs. 11,759.4 million for the fiscal years ended March 31, 2023 and March 31, 2024, respectively. Further, Others also includes reinsurance assets amounting to Rs. 105,661.6 millio n

Deposits

Deposits	12 Months Ended
	Mar. 31, 2024
Deposits	15. Deposits Deposits include demand deposits, which are non-interest-bearing, and As of March 31, 2023 2024 2024 (In millions) Interest-bearing: Savings deposits Rs. 5,624,911.4 Rs. 5,987,449.1 US$ 71,843.6 Time deposits 10,472,547.9 14,700,957.1 176,397.4 Total interest-bearing deposits 16,097,459.3 20,688,406.2 248,241.0 Non-interest-bearing deposits 2,729,176.3 3,079,829.4 36,955.0 Total Rs. 18,826,635.6 Rs. 23,768,235.6 US$ 285,196.0 As of March 31, 2023 and March 31, 2024, time deposits of Rs. 7,121,444.9 million and Rs. 10,598,905.6 million, respectively, had a residual maturity of one year or less. The remaining deposits mature between one As of March 31, 2023 and March 31, 2024, time deposits in excess of Rs.0.5 million aggregated Rs. 9,127,675.3 million and Rs. 12,777,915.1 million, respectively. As of March 31, 2024, the scheduled maturities for total time deposits were as follows: As of March 31, 2024 (In millions) Due to mature in the fiscal year ending March 31: 2025 Rs. 10,598,905.6 US$ 127,176.7 2026 2,030,231.8 24,360.8 2027 972,634.2 11,670.7 2028 495,929.0 5,950.7 2029 365,318.4 4,383.5 Thereafter 237,938.1 2,855.0 Total Rs. 14,700,957.1 US$ 176,397.4

Short-term borrowings

Short-term borrowings	12 Months Ended
	Mar. 31, 2024
Short-term borrowings	16. Short-term borrowings Short-term borrowings mainly comprised of money market borrowings which are unsecured and are utilized by the Bank for its operations. Short-term borrowings as of March 31, 2023 and March 31, 2024 comprised the following: As of March 31, 2023 2024 2024 (In millions) Borrowed in the call market Rs. 14,359.5 Rs. 50,356.7 US$ 604.2 Term borrowings from institutions/banks 735,131.5 1,028,262.6 12,338.2 Foreign currency borrowings 320,695.0 200,685.2 2,408.0 Bills rediscounted 19,711.5 34,432.6 413.2 Total Rs. 1,089,897.5 Rs. 1,313,737.1 US$ 15,763.6 Total borrowings outstanding: Maximum amount outstanding Rs. 1,154,282.6 Rs. 2,415,549.7 US$ 28,984.3 Average amount outstanding Rs. 870,879.3 Rs. 1,416,168.6 US$ 16,992.7 Weighted average interest rate 4.0 % 6.9 % 6.9 %

Long-term debt

Long-term debt	12 Months Ended
	Mar. 31, 2024
Long-term debt	17. Long-term debt Long-term debt as of March 31, 2023 and March 31, 2024 was comprised of the following: As of March 31, 2023 2024 2024 (In millions) Subordinated debt Rs. 375,060.0 Rs. 407,531.3 US$ 4,890.0 Others ( ) 1,681,587.2 6,244,131.6 74,923.6 Debt issuance cost (2,210.8 ) (2,890.9 ) (34.7 ) Total Rs. 2,054,436.4 Rs. 6,648,772.0 US$ 79,778.9 ( ) Includes securities sold under repurchase agreements amounting to Rs. 90,200.0 million with a stated interest rate of 4.2% per annum for fiscal year ended March 31, 2023 and nil for the fiscal year ended March 31, 2024, under RBI long-term repo operation with a three-year maturity period. Increase in outstanding balance of Long-term debt – other as of March 31, 2024 is essentially on account of the Transaction (Refer note 3). The below table presents the balance of long-term debt as of March 31, 2023 and March 31, 2024 and the related contractual rates and maturity dates: As of March 31, 2023 March 31, 2024 Maturity / Stated interest rates Total Maturity / Stated interest rates Total Total (In millions) Subordinated debt Subordinated debt (other than perpetual debt) 2024-2033 7.35% to 10.20% Rs. 248,983.8 2025-2034 6.67% to 9.7% Rs. 276,600.6 US$ 3,318.9 Perpetual debt — (1) 2024-2030 7.55% to 9.40% 43,850.5 2029-2038 7.55% to 9.4% 47,290.8 567.4 Perpetual debt — (2) 2027 3.70% 81,724.6 2037 3.70% 83,090.7 997.0 Others ( ) Variable rate — (1) 2024-2026 1.40% to 4.80% 76,405.9 2026-2029 6.10% to 6.51% 479,577.3 5,754.5 Variable rate — (2) 2024-2029 4.50% to 9.44% 148,813.9 2025-2030 6.21% to 9.0% 1,235,079.0 14,819.8 Fixed rate — (1) 2024-2030 2.80% to 9.81% 1,374,137.4 2025-2034 2.80% to 9.60% 4,313,107.4 51,753.2 Fixed rate — (2) 2024 2.58% 80,520.3 2025-2029 5.18% to 8.19% 214,026.2 2,568.1 Total Rs. 2,054,436.4 Rs. 6,648,772.0 US$ 79,778.9 ( ) Variable rate — (1), Perpetual debt — (2) and Fixed rate — (2) represent foreign currency debt. Variable rate debt is typically indexed to LIBOR, SOFR, T-bill rates, Marginal cost of funds based lending rates (“MCLR”), among others. The scheduled maturities of long-term debt are set out below: As of March 31, 2024 (In millions) Due in the fiscal year ending March 31: 2025 Rs. 706,824.8 US$ 8,481.2 2026 1,602,175.8 19,224.6 2027 1,359,351.1 16,311.0 2028 284,462.3 3,413.3 2029 596,057.0 7,152.1 Thereafter 1,969,519.5 23,632.3 Total (1) Rs. 6,518,390.5 US$ 78,214.5 (1) The scheduled maturities of long-term debt do not include perpetual bonds of Rs. 130,381.5 million (net of debt issuance cost). During the fiscal year ended March 31, 2024 the Bank issued subordinated debt amounting to Rs. 20,000.0 million (previous period Rs. 200,000.0 million) and perpetual debt amounting to Rs. 3,500.0 million (previous period Rs. 30,000.0 million). During the fiscal year ended March 31, 2024, the Bank also raised other long-term debt amounting to Rs. 1,132,275.2 million (previous period Rs. 792,933.1 million). As of March 31, 2023 and March 31, 2024, other long-term debt includes foreign currency borrowings from other banks aggregating to Rs. 157,092.6 million and Rs. 693,914.0 million, respectively, and functional currency borrowings aggregating to Rs. 1,524,494.6 million and Rs. 5,550,217.6 million, respectively.

Accrued expenses and other liab

Accrued expenses and other liabilities	12 Months Ended
	Mar. 31, 2024
Accrued expenses and other liabilities	18. Accrued expenses and other liabilities Accrued expenses and other liabilities include the amounts set forth below: As of March 31, 2023 2024 2024 (In millions) Bills payable Rs.  117,907.5 Rs.  139,454.3 US$  1,673.3 Remittances in transit 61,927.3 85,743.4 1,028.8 Accrued expenses 45,684.4 82,752.6 993.0 Accounts payable 206,920.4 292,846.0 3,513.9 Derivatives (-refer to note 2 5 98,783.5 109,409.9 1,312.8 Deferred tax —  288,154.4 3,457.6 Lease liability 97,658.9 131,043.0 1,572.4 Others 125,471.4 165,599.2 1,987.0 Total Rs.  754,353.4 Rs.  1,295,002.8 US$  15,538.8 The Bank amortizes annual fees on credit cards over the contractual period of the fees. The unamortized annual fees as of March 31, 2023 and March 31, 2024 were Rs. 1,194.7 million and Rs. 1,649.9 million (US$ 19.8 million), respectively.

Accumulated other comprehensive

Accumulated other comprehensive income	12 Months Ended
	Mar. 31, 2024
Accumulated other comprehensive income	19. Accumulated other comprehensive income The below table presents the changes in AOCI after income tax for the fiscal years ended March 31, 2023 and March 31, 2024. AFS debt securities Foreign currency Total (In millions) Balance, March 31, 2022 Rs.  (21,063.4 ) Rs.  3,270.9 Rs.  (17,792.5 ) Net unrealized gain/(loss) arising during the period (52,522.8 ) 3,378.5 (49,144.3 ) Amounts reclassified to income (1,336.9 ) —  (1,336.9 ) Balance, March 31, 2023 Rs.  (74,923.1 ) Rs.  6,649.4 Rs.  (68,273.7 ) AFS debt securities Foreign currency Long-Duration Total (In millions) Balance, March 31, 2023 Rs.  (74,923.1 ) Rs.  6,649.4 Rs.  —  Rs.  (68,273.7 ) Net unrealized gain/ (loss) arising during the period 78,036.1 810.3 —  78,846.4 Amounts reclassified to income 4,856.3 —  —  4,856.3 Long-duration insurance contract discount rate change —  —  (34,112.6 ) (34,112.6 ) Transferred to undistributed policyholders earnings account — —  3,391.4 3,391.4 Net change  7,969.3  7,459.7 (30,721.2 )  (15,292.2 ) Less: Other comprehensive income attributable to shareholders of noncontrolling interest  15,474.5  17.9  (15,244.2 )  248.2 Balance, March 31, 2024 Rs . (7,505.2 ) Rs. 7,441.8 Rs. (15,477.0 ) Rs. (15,540.4 ) Balance, March 31, 2024 US$  (90.1 ) US$  89.3 US$ (185.7 ) US$ (186.5 ) The below table presents the reclassification out of AOCI by income line item and the related income tax effect for the fiscal years ended March 31, 2023 and March 31, 2024. As of March 31, 2023 2024 2024 (In millions) AFS debt securities: Realized (gain)/loss on sales of AFS debt securities, net Rs. (1,857.5 ) Rs. 6,602.9 US$ 79.3 Allowance on AFS debt securities 70.9 (70.9 ) (0.9 ) Total before income tax Rs. (1,786.6 ) Rs. 6,532.0 US$ 78.4 Income tax 449.7 (1,675.7 ) (20.1 ) Net of income tax Rs. (1,336.9 ) Rs. 4,856.3 US$ 58.3

Insurance services

Insurance services	12 Months Ended
	Mar. 31, 2024
Separate Accounts Disclosure [Abstract]
Insurance services	20. Insurance services: Separate accounts assets and liabilities: Separate account assets consist of investment accounts established and maintained by the Bank. The investment objectives of these assets are directed by the contract holder. An equivalent amount is reported as separate account liabilities. These accounts are reported separately from the general account assets and liabilities. The following information about the separate account liabilities includes disaggregated rollforwards. The products grouped within these rollforwards were selected based upon common characteristics and valuations using similar inputs, judgments, assumptions and methodologies within a particular line of business. The separate account liabilities are primarily comprised of the following Unit-Linked Life, Unit-Linked Pension and Group Linked contracts. The balances of and changes in separate account liabilities were as follows: As of March 31, 2024 Particulars Unit-Linked Life Unit-Linked Group Linked Total Total (In millions) Balance, July 1, 2023 Rs. 709,215.4 Rs.  55,986.3 Rs. 92,327.0 Rs.  857,528.7 US$  10,289.5 Premiums and deposits 97,196.3 3,556.3 16,103.6 116,856.2 1,402.1 Policy Charges (12,754.4 ) (594.4 ) (762.9 ) (14,111.7 ) (169.3 ) Surrenders and withdrawals (104,102.3 ) (8,432.7 ) (6,882.6 ) (119,417.6 ) (1,432.9 ) Benefit Payments (37,926.8 ) (2,504.9 ) —  (40,431.7 ) (485.1 ) Investment Performance 141,987.6 7,709.9 8,454.5 158,152.0 1,897.7 Other Charges (2,904.3 ) (124.2 ) (131.1 ) (3,159.6 ) (37.9 ) Balance, March 31, 2024 Rs.  790,711.5 Rs. 55,596.3 Rs.  109,108.5 Rs.  955,416.3 US$ 11,464.1 The Bank’s aggregate fair value of assets, by major investment asset category, supporting separate accounts liabilities was as follows: As of March 31, 2024 Particulars Unit-Linked Life Unit-Linked Group Linked Total Total (In millions) Government of India securities Rs. 39,549.7 Rs. 7,114.1 Rs. 46,433.5 Rs. 93,097.3 US$ 1,117.0 Other corporate/financial institution securities 74,622.2 8,253.7 34,739.2 117,615.1 1,411.3 Total debt securities 114,171.9 15,367.8 81,172.7 210,712.4 2,528.3 Other securities (including mutual fund units) 671,814.6 39,955.9 25,036.5 736,807.0 8,841.0 Other net current assets 4,725.0 272.6 2,899.3 7,896.9 94.8 Total Rs. 790,711.5 Rs. 55,596.3 Rs. 109,108.5 Rs. 955,416.3 US$ 11,464.1 Liabilities on policies in force The Bank’s Liabilities on policies in force on the consolidated balance sheets was as follows: Description As of March 31, 2024 (in millions) Liability for Future Policy Benefits Rs.  1,671,384.1 US$  20,055.0 Policyholder Account Balances 85,430.1 1,025.1 Other Policy Liabilities 7,164.9 86.0 Total 1,763,979.1 21,166.1 Liability for future policy benefits The Bank’s liability for future policy benefits on the consolidated balance sheets was as follows: Description As of March 31, 2024 (in millions) Non Par Protection Rs.  166,649.2 US$ 1,999.6 Non Par Riders 207.0 2.5 Non Par Savings 551,186.3 6,613.7 Non Par Pension 17,609.5 211.3 Individual Annuity 255,858.7 3,070.1 Individual health 410.4 4.9 Par life 561,076.4 6,732.4 Par Pension 16,294.1 195.5 Group Non Par Life 102,092.5 1,225.0 Total Rs.  1,671,384.1 US$  20,055.0 The following information about the liability for future policy benefits includes disaggregated rollforwards of expected future net premiums and expected future benefits. The products grouped within these rollforwards were selected based upon common characteristics and valuations using similar inputs, judgments, assumptions and methodologies within a particular line of business. All amounts presented in the rollforwards and accompanying financial information do not include a reduction for amounts ceded to reinsurers, except with respect to ending net liability for future policy benefits balances where applicable. Year Ended March 31, 2024 Non Par Non Par Non Par Non Par Individual Annuity Individual Par Life Par Group Non Par Life Total Total (Rs. In million, other than weighted average) (US$ in million) Present value of Expected Net Premium Balance at July 01, at current 40,899.8 429.3 251,372.4 97.1 2,472.3 791.6 44.0 —  —  296,106.5 3,553.0 Balance at July 01, at original 40,899.8 429.3 251,372.4 97.1 2,472.3 791.6 44.0 —  —  296,106.5 3,553.0 Effect of changes in cash flow assumptions 4,429.1 —  (42.8 ) 0.3 6.4 —  619.0 —  —  5,012.0 60.1 Effect of actuarial variances (1,277.3 ) 15.6 2,649.0 0.8 395.8 43.6 2,640.7 (0.7 ) 9,298.2 13,765.7 165.2 Adjusted Balance 44,051.6 444.9 253,978.6 98.2 2,874.5 835.2 3,303.7 (0.7 ) 9,298.2 314,884.2 3,778.3 Issuances 18,075.3 891.5 93,550.6 1,918.4 36,417.8 33.8 27,308.5 2,081.3 16,873.7 197,150.9 2,365.6 Interest accrual 3,343.2 69.4 17,926.3 98.4 1,272.8 44.5 1,539.5 102.3 436.2 24,832.6 298.0 Net premium collected (7,081.9 ) (256.7 ) (72,133.2 ) (537.5 ) (32,412.7 ) (171.1 ) (6,418.9 ) (562.6 ) (26,601.3 ) (146,175.9 ) (1,754.0 ) Balance at March 31, at original discount rate 58,388.2 1,149.1 293,322.3 1,577.5 8,152.4 742.4 25,732.8 1,620.3 6.8 390,691.8 4,687.9 Effect of changes in discount 174.0 (2.6 ) (1,182.0 ) (6.3 ) 4.3 (1.8 ) (97.2 ) (7.0 ) 0.1 (1,118.5 ) (13.4 ) Balance at March 31, at current discount rate at balance sheet date 58,562.2 1,146.5 292,140.3 1,571.2 8,156.7 740.6 25,635.6 1,613.3 6.9 389,573.3 4,674.5 Present value of Expected Future Policy Benefits Balance at July 01, at current 180,285.0 413.9 658,883.0 13,185.7 212,888.9 1,088.2 504,494.2 16,744.8 66,264.0 1,654,247.7 19,849.4 Balance at July 01, at original 180,285.0 413.9 658,883.0 13,185.7 212,888.9 1,088.2 504,494.2 16,744.8 66,264.0 1,654,247.7 19,849.4 Effect of changes in cash flow assumptions 7,429.2 —  3,429.0 35.1 75.7 —  (1,377.7 ) 326.1 1,498.4 11,415.8 137.0 Effect of actuarial variances (1,526.0 ) 15.9 2,653.6 (187.0 ) (136.9 ) 43.7 2,250.6 539.3 7,379.6 11,032.8 132.4 Adjusted Balance 186,188.2 429.8 664,965.6 13,033.8 212,827.7 1,131.9 505,367.1 17,610.2 75,142.0 1,676,696.3 20,118.8 Issuances 18,051.0 882.1 93,520.0 1,918.4 36,417.8 33.8 27,264.0 2,080.8 16,873.7 197,041.6 2,364.3 Interest accrual 11,529.5 73.3 43,134.7 798.0 14,141.1 63.1 29,361.4 1,063.9 4,700.4 104,865.4 1,258.3 Benefits Payments (5,294.9 ) (81.5 ) (8,918.6 ) (2,530.3 ) (12,654.0 ) (137.5 ) (45,730.7 ) (2,959.8 ) (20,373.2 ) (98,680.5 ) (1,184.1 ) Balance at March 31, at original discount rate 210,473.8 1,303.7 792,701.7 13,219.9 250,732.6 1,091.3 516,261.8 17,795.1 76,342.9 1,879,922.8 22,557.3 Effect of changes in discount 6,215.7 4.7 17,990.2 (28.9 ) 6,399.5 0.1 3,658.3 (37.5 ) (188.4 ) 34,013.7 408.1 Balance at March 31, at current discount rate at balance sheet date 216,689.5 1,308.4 810,691.9 13,191.0 257,132.1 1,091.4 519,920.1 17,757.6 76,154.5 1,913,936.5 22,965.4 Present value of expected claims expenses 242.0 26.8 142.2 2.8 32.9 0.1 547.5 4.3 —  998.6 12.0 Net liability for future policy benefits 158,369.3 188.7 518,693.8 11,622.6 249,008.3 350.9 494,832.0 16,148.6 76,147.6 1,525,361.8 18,302.9 Deferred Profit Liability 6,568.5 18.3 29,891.5 175.2 6,543.2 —  63,225.0 95.9 6,602.0 113,119.6 1,357.3 Other global reserves 1,711.4 —  2,601.0 5,811.7 307.2 59.5 3,019.4 49.6 19,342.9 32,902.7 394.8 Total liability for future policy 166,649.2 207.0 551,186.3 17,609.5 255,858.7 410.4 561,076.4 16,294.1 102,092.5 1,671,384.1 20,055.0 Less: Reinsurance recoverables 83,420.6 28.0 (17.4 ) —  —  125.2 18,249.9 —  3,786.3 105,592.6 1,267.0 Net liability for future policy benefits, net of reinsurance 83,228.6 179.0 551,203.7 17,609.5 255,858.7 285.2 542,826.5 16,294.1 98,306.2 1,565,791.5 18,788.0 Undiscounted- Expected future 1,120,561.7 2,580.3 2,875,101.5 19,433.2 864,912.6 1,758.2 1,302,045.2 25,927.9 96,029.6 6,308,350.2 75,694.1 Discounted- Expected future benefit payments (at current discount rate 216,689.5 1,308.4 810,691.9 13,191.0 257,132.1 1,091.4 519,920.1 17,757.6 76,154.5 1,913,936.5 22,965.4 Undiscounted-Expected future gross premiums 296,828.1 3,359.9 611,779.3 3,502.2 21,253.0 1,769.6 507,662.9 7,523.1 220.7 1,453,898.8 17,445.4 Discounted-Expected future gross premiums 172,175.3 2,461.1 489,752.0 2,869.1 18,427.5 1,289.9 409,535.4 6,057.0 124.3 1,102,691.6 13,231.2 Weighted-average duration of the liability (in years) 13.50 10.57 10.39 4.25 10.30 5.96 8.39 4.06 3.23 Weighted-average interest accretion (original locked-in) rate 7.69 % 7.69 % 7.69 % 7.69 % 7.69 % 7.69 % 7.69 % 7.69 % 7.69 % Weighted-average current discount rate at balance sheet date 7.40 % 7.40 % 7.42 % 7.66 % 7.42 % 7.50 % 7.48 % 7.66 % 7.68 % The principal inputs used in the establishment of the LFPB for the Traditional and Limited-Payment products include premiums, guaranteed benefits, claim-related expense projected on the best estimate assumptions basis. The cash flows are discounted using upper-medium grade discount rate at the balance sheet date. The best estimate assumptions include mortality, persistency, morbidity and expenses. For each of the years ended March 31, 2024, the net effect of changes in cash flow assumptions was primarily driven by updates in best estimate assumptions. For the year ended March 31, 2024, the net effect of actual variances from expected experience was primarily driven by difference between actual cash flows for premiums and benefits and those assumed in the calculation of LFPB. The Bank’s gross premiums and interest accretion recognised in the Traditional and Limited-Payment Contracts: As of March 31, 2024 (In millions) Gross premiums Interest accretion Non Par Protection Rs. 120,828.1 Rs. 8,357.9 Non Par Riders — 4.4 Non Par Savings 23,560.0 25,621.0 Non Par Pension 1,020.9 704.0 Individual Annuity 39,984.9 12,926.3 Individual health 419.0 17.6 Par life 111,036.4 29,795.5 Par Pension 1,846.5 962.1 Group Non Par Life 71,156.2 4,371.4 Total Rs. 369,852.0 Rs. 82,760.2 Total US$ 4,437.9 US$ 993.0 Policyholder Account Balances The Bank establishes liabilities for policyholder account balances (PAB) which are generally equal to the account value, and which includes accrued interest credited, but excludes the impact of any applicable charge that may be incurred upon surrender. The Bank’s policyholder account balances on the consolidated balance sheets was as follows: Description As of March 31, 2024 (in millions) Group traditional life Rs. 23,718.6 US$ 284.6 Group traditional pension 8,824.2 105.9 Group variable life 22,764.1 273.1 Group variable pension 19,200.9 230.4 Individual VIP pension 9,613.9 115.4 Statutory reserves 1,308.4 15.7 Total 85,430.1 1,025.1 Reinsurance The Bank has primarily two types of reinsurance treaties, auto and facultative reinsurance. The primary reason is to diversify the pool of risk covered by the insurance company, and to limit the liability along with ensuring solvency of the Bank. We remain liable to our policyholders regardless of whether our reinsurers meet their obligations under the reinsurance contracts, and as such, we regularly evaluate the financial condition of our reinsurers and monitor concentration of our credit risk. The effect of all reinsurance agreements on the consolidated statements of financial income As of March 31, 2024 Liabilities on policies in force: (In millions) Direct Rs 1,763,024.4 US$ 21,154.6 Assumed 954.7 11.5 Total liabilities on policies in force 1,763,979.1 21,166.1 Ceded (*) 105,661.6 1,267.8 Net liabilities on policies in force 1,658,317.5 19,898.3 (*) Reinsurance asset reported within other asset The effects of reinsurance on the consolidated statements of income were as follows: As of March 31, 2024 Premium and other operating income from insurance business: (In millions) Direct Rs.  389,925.5 US$  4,678.7 Assumed 1,588.5 19.1 Ceded (9,634.5 ) (115.6 ) Total 381,879.5 4,582.2 As of March 31, 2024 Claims and benefits paid pertaining to insurance business: (In millions) Direct Rs.  383,194.5 US$  4,597.9 Assumed 1,029.4 12.4 Ceded (2,258.1 ) (27.1 ) Total 381,965.8 4,583.2 Deferred policy acquisition costs: Information regarding total DAC was as follows: As of March 31, 2024 (In millions) Opening balance July 1, 2024 Rs.  —  US$  —  Capitalizations 64,390.0 772.6 Amortization (2,971.3 ) (35.7 ) Experience Adjustment (886.8 ) (10.6 ) Balance at March 31, 2024 Rs.  60,531.9 US$  726.3 Value of Business Acquired (VOBA) VOBA, an intangible asset, has been valued as the difference between the estimated Fair Value of liabilities (“FVL”) and the carrying value of those same insurance contract liabilities. The FVL for the acquired business is derived as the sum of the best estimate of liabilities (“BEL”) and the risk margin (“RM”) calculated using the same best estimate assumptions as those used in deriving the Bank’s Indian embedded value (“IEV”) as at June 30, 2023. The carrying value of those same insurance contract liabilities is derived as the LFPB plus other liability items (reserves for unmodelled products, sales inducement liability, time value of options and guarantees, and additional reserves) less reinsurance recoverable. The LFPB is determined using actuarial methodologies as the present value of expected future policy benefits to be paid to or on behalf of policyholders and certain related expenses less the present value of expected future net premiums receivable under the Bank’s insurance contracts. Future policy benefits including bonuses paid to participating policyholders are calculated using actuarial assumptions and estimates such as mortality, morbidity, persistency and discount rates. Cash flow assumptions (mortality, morbidity and persistency) are established at the policy inception and are evaluated annually to determine if an update is needed. Discount rates used to calculate net premiums are locked in at the policy inception and represent the basis to recognize interest expense in the consolidated statement of income. Discount rates used to measure the carrying value of the LFPB in the consolidated balance sheet are updated at each reporting period, and the difference between the liability balances calculated using the locked-in discount rates and the updated discount rates is recognized in accumulated other comprehensive income / (loss). The Bank applies significant judgment in determining these assumptions and estimates. Information regarding movement of total VOBA contracts from July 1, 2023 (acquisition date) to March 31, 2024 was as follows: As of March 31, 2024 (In millions) Balance at July 1 2023 Rs. 221,738.5 US$ 2,660.6 Amortization (16,707.7 ) (200.5 ) Experience Adjustment (635.1 ) (7.6 ) Balance at March 31 2024 Rs. 204,395.7 US$ 2,452.5 VOBA would be amortized on a constant level basis that approximates straight line amortization using the following amortization basis. This is the same as the basis of amortization used for DAC. i) Traditional life insurance contracts and traditional life ii) Annuity products—Number of policies in force, as it would ensure straight line amortization. iii) Universal life type contracts—Number of policies in force, as it would ensure straight line amortization. Information regarding the estimated future amortization of VOBA intangibles over the next five years is as follows: As of March 31, 2024 Year (In millions) 2025 Rs. 16,705.3 US$ 200.4 2026 14,721.9 176.6 2027 13,016.3 156.2 2028 11,176.1 134.1 2029 9,539.9 114.5 The Bank amortizes DAC and VOBA on a ‘constant-level basis’ that approximates straight-line amortization on an individual contract basis sum assured for traditional products and are

Non-interest revenue

Non-interest revenue	12 Months Ended
	Mar. 31, 2024
Non-interest revenue	21. Non-interest revenue Revenue Recognition Deposit-related fees Deposit-related fees consist of fees earned on consumer deposit activities and are generally recognized when the transaction occurs or as the service is performed. Consumer fees are earned on consumer deposit accounts for account maintenance and various transaction-based services, such as ATM transactions, wire transfer activities, check and money order processing, standing instruction processing, cash management services, etc. Lending-related fees Lending-related fees generally represent transactional fees earned from certain loan related services, guarantees and letters of credit (“LCs”). Third-party products-related fees Third-party products related fees consist of fees earned from distribution of third-party products such as insurance and mutual funds. Payments and cards business fees Payments and cards business fees include fees earned from merchant acquiring business and on Credit, Debit, Prepaid or Forex cards, among others. Cards business income includes annual and renewal fees, late and over-limit fees, currency conversion fees, as well as fees earned from interchange, cash advances and other miscellaneous transactions fees. Interchange fees are recognized upon settlement of the credit and debit card payment transactions and are generally determined on a percentage basis for credit and debit cards based on the corresponding payment network’s rates. Substantially all cards business related fees are recognized at the transaction date, except for certain time-based fees such as annual fees, which are recognized over 12 months. Payments business fees include fees earned from merchants net of interchange expenses paid to issuing banks, rentals from point-of-sale machines and merchant service charges. Investment Management Fees Investment management fees from the Mutual fund consists of fees from various schemes which invest in different categories of securities like Equity, Debt etc. received from asset management business. The table below presents the fees and commissions disaggregated Fiscal year ended March 31, 2022 2023 2024 2024 (In millions) Deposit related fees Rs.  37,415.4 Rs.  40,749.9 Rs.  45,178.6 US$  542.1 Lending related fees 40,532.5 48,878.2 55,501.7 666.0 Third-party products related fees 44,216.1 54,548.9 43,049.3 516.6 Payments and cards business fees 56,170.2 72,969.0 92,568.5 1,110.7 Investment Management Fee —  —  20,819.1 249.8 Others 24,645.3 22,457.7 23,848.7 286.1 Fees and commissions Rs.  202,979.5 Rs.  239,603.7 Rs.  280,965.9 US$  3,371.3 The table below presents the fees and commission disaggregated by segment for the fiscal years ended March 31, 2022, March 31, 2023 and March 31, 2024. Fiscal year ended March 31, 2022 2023 2024 2024 (In millions) Retail Banking Rs.  182,464.1 Rs.  215,252.5 Rs.  229,890.7 US$  2,758.5 Wholesale Banking 19,802.0 23,619.5 27,844.8 334.1 Treasury Services 713.4 731.7 414.9 5.0 Insurance services —  —  —  —  Others —  —  22,815.5 273.7 Fees and commissions Rs. 202,979.5 Rs. 239,603.7 Rs. 280,965.9 US$ 3,371.3

Income taxes

Income taxes	12 Months Ended
	Mar. 31, 2024
Income taxes	22. Income taxes Income tax expense is comprised of the following: Fiscal year ended March 31, 2022 2023 2024 2024 (In millions) Current tax expense Rs.  142,446.5 Rs.  156,782.9 Rs.  140,308.9 US$  1,683.6 Deferred tax expense/ (benefit) (9,887.3 ) 12,280.9 (57,133.2 ) (685.5 ) Interest on income tax refund —  (2,946.4 ) (5,348.6 ) (64.2 ) Income tax expense Rs. 132,559.2 Rs. 166,117.4 Rs. 77,827.1 US$ 933.9 Income tax (expense)/ benefit recorded in other comprehensive income was Rs. 15,129.2, Rs. million and Rs. million for the fiscal years ended March 31, 2022, Income before income tax expense and income tax expense are substantially all from India. Taxes at the Indian statutory income tax rate, the income tax rate of the Bank’s country of domicile, to income tax expense as reported: Fiscal year ended March 31, 2022 2023 2024 2024 (In millions) Income before income tax expense Rs. 519,162.2 Rs. 662,381.8 Rs. 705,459.0 US$ 8,465.0 Statutory income tax rate 25.17 % 25.17 % 25.17 % 25.17 % Expected income tax expense 130,662.7 166,708.3 177,549.9 2,130.4 Adjustments to reconcile expected income tax to actual tax expense Interest on income tax refund —  (2,204.9 ) (4,125.0 ) (49.5 ) Stock-based compensation 3,493.1 1,645.9 (10,645.6 ) (127.7 ) Income subject to rates other than the statutory income tax rate (2,347.6 ) (6.8 ) (1,262.0 ) (15.1 ) Special reserve —  —  (5,143.2 ) (61.7 ) Unrecognised tax benefit of earlier years including consequential tax credit pursuant to favourable orders received recognised (80,874.4 ) (970.4 ) Other, net 751.0 (25.1 ) 2,327.4 27.9 Income tax expense Rs. 132,559.2 Rs. 166,117.4 Rs.  77,827.1 US$  933.9 The tax effects of significant temporary differences are as follows: As of March 31, 2023 2024 2024 (In millions) Tax effect of: Deductible temporary differences: Allowance for credit losses Rs. 74,143.7 Rs. 43,093.6 US$ 517.1 Investments AFS debt securities 25,117.0 7,704.7 92.4 Lease liabilities 24,578.8 32,034.7 384.4 Employee benefits 709.9 4,632.2 55.6 Borrowings 1.4 10,714.9 128.6 Stock based compensation —  20,166.2 241.9 Others 5,458.1 320.1 3.9 Deferred tax asset 130,008.9 118,666.4 1,423.9 Taxable temporary differences: ROU Asset 24,578.8 32,009.3 384.1 Loan origination cost 7,070.1 7,541.1 90.5 Intangible assets — 313,272.2 3,759.0 Investments, others 8,304.6 53,998.2 647.9 Deferred tax liability 39,953.5 406,820.8 4,881.5 Net deferred tax asset/ (liability) Rs. 90,055.4 Rs.  (288,154.4 ) US$  (3,457.6 ) Management believes that the realization of the recognized deferred tax assets is The total unrecognized tax benefit as of March 31, 2023 and March A reconciliation of the beginning and ending balance of unrecognized tax benefits is as follows: Fiscal year ended March 31, 2022 2023 2024 2024 (In millions) Opening balance Rs. 43,048.0 Rs. 46,774.3 Rs. 48,792.1 US$ 585.5 Increase related to acquisition of eHDFC —  —  52,980.5 635.7 Decrease related to prior year tax positions (1,985.0 ) —  (80,874.4 ) (970.4 ) Increase related to current year tax positions 5,711.3 2,017.8 1,144.1 13.7 Closing balance Rs. 46,774.3 Rs.  48,792.1 Rs.  22,042.3 US$  264.5 The Bank’s total unrecognized tax benefits, if recognized, would reduce the income tax expense by Rs. 48,792.1 million and Rs. 22,042.3 million as of March 31, 2023 and March 31, 2024, respectively, and thereby would affect the Bank’s effective tax rate. All of the Bank’s unrecognized tax benefits are presented as unrecognized refund claims. Significant changes in the amount of unrecognized tax benefits within the next 12 months cannot be reasonably estimated as the changes would depend upon the progress of tax examinations with various tax authorities.

Stock

Stock	12 Months Ended
	Mar. 31, 2024
Stock-based compensation	23. Stock Stock-based compensation The stock-based compensation plans of the Bank are as follows: Employees Stock Option Scheme (“ESOP”) The shareholders of the Bank approved in January 2000 Plan “A”, in June 2003 Plan “B”, in June 2005 Plan “C”, in June 2007 Plan “D”, in June 2010 Plan “E”, in June 2013 Plan “F” and in July 2016 Plan “G” of the Employees’ Stock Option Scheme (the “Plan”). The Bank reserved 100.0 million equity shares, with an aggregate nominal value of Rs.100.0 million, for issuance under each Plan “A”, “B” and “C”. Under Plan “D”, the Bank reserved 150.0 million equity shares with an aggregate nominal value of Rs.150.0 million. The Bank reserved 200.0 million equity shares with an aggregate nominal value of Rs. 200.0 million, for issuance under each of Plan “E”, “F” and “G”. Under the terms of each of these Plans, the Bank may issue stock options to employees and whole-time directors of the Bank, each of which is convertible into one equity share. Plan A provides for the issuance of options at the recommendation of the Nomination and Remuneration Committee of the Board (the “NRC”) at an average of the daily closing prices on the BSE Limited during the 60 days preceding the date of grant of options, which was the minimum prescribed option price under regulations then issued by the Securities and Exchange Board of India (“SEBI”). Plan B, Plan C, Plan D, Plan E, Plan F and Plan G provide for the issuance of options at the recommendation of the NRC at the closing price on the working day immediately preceding the date when options are granted. For Plan B the price is that quoted on an Indian stock exchange with the highest trading volume during the preceding two weeks, while for Plan C, Plan D, Plan E, Plan F and Plan G, the price is that quoted on an Indian stock exchange with the highest trading volume as of the working day preceding the date of grant. Such options vest at the discretion of the NRC. These options are exercisable for a period following vesting at the discretion of the NRC, subject to a maximum of five years, as set forth at the time of the grant. Presently, there are no stock options issued and outstanding under Plan A to Plan D On July 31, 2021 and November 25, 2021 , During In terms of the Amalgamation agreement, on merger of eHDFC, 48,559,681 options of equity shares having face value of Rs. 1.0 each were granted to the merged employees as replacement of their options with eHDFC. Restricted Stock Units (“RSUs”) On May 14, 2022, the shareholders of the Bank approved the Employees Stock Incentive Master Scheme 2022 (“ESIS-2022”). The Bank reserved 100.0 million equity shares with an aggregate nominal value of Rs.100.0 million, for the grant of Restricted Stock Units (“RSUs”). Grants under ESIS-2022 can be made over a period of four years from the date of approval by the NRC i.e., until May 13, 2026. Under the terms of ESIS-2022, the Bank may issue RSUs, each of which is convertible into one equity share, to employees and whole-time directors of the Bank. ESIS-2022 provides for issuance of RSUs at a face value of Rs.1.0 at the recommendation of the NRC. Such RSUs vest at the discretion of the NRC and are exercisable for a period following the vesting at the discretion of the NRC, subject to a maximum period of four years, as During the fiscal year ended March 31, 2023 Modification of employee stock option schemes During the fiscal years ended March 31, 2022, March 31, 2023 and March 31, 2024, there were no other modifications to employee stock option schemes. Assumptions used The fair value of employee stock option schemes has been estimated on the dates of each grant using a binomial option pricing model with the following assumptions: Fiscal years ended March 31, 2022 2023 2024 Dividend yield 0.43%-0.46% 0.51%-0.97% 0.67%-0.71% Expected volatility 21.71%-31.79% 21.97%-33.50% 21.91%-27.42% Risk-free interest rate 4.99%-6.43% 6.14%-7.59% 7.21%-7.55% Expected term (in years) 2.59-5.36 2.53-7.25 4.50-7.25 The fair value of restricted stock units has been estimated on the dates of each grant using a binomial option pricing model with the following assumptions: Fiscal years ended March 31, 2023 2024 Dividend yield 0.47%-0.75% 0.65%-1.17% Expected volatility 23.68%-35.35% 21.32%-35.35% Risk-free interest rate 7.07%-7.57% 6.85%-7.18% Expected term (in years) 1.0- 4.0 1.0- 4.0 The Bank recognizes compensation expense related to stock-based compensation plans over the requisite service period, generally based on the instruments’ grant-date fair value, reduced by expected forfeitures. Ultimately, the compensation cost for all awards that vest is recognized. Activity and other details Activity in the options available to be granted under the employee stock option scheme Number of options available to be granted 2022 2023 2024 Options available to be granted, beginning of period 104,694,170 81,992,420 54,214,165 Equity shares allocated for grant under the plan —  —  —  Options granted (25,628,600 ) (30,480,145 ) (24,384,690 ) Forfeited/lapsed 2,926,850 2,701,890 2,662,442 Options available to be granted, end of period 81,992,420 54,214,165 32,491,917 Activity in the RSUs outstanding under the various Employees’ Stock Incentive Master Scheme as of March 31, 2024: Number of RSUs available to be granted 2023 2024 RSUs available to be granted, beginning of period —  97,109,000 Equity shares allocated for grant under the scheme 100,000,000 —  RSUs granted (2,891,000 ) (9,354,224 ) Forfeited/lapsed —  206,800 RSUs available to be granted, end of the period 97,109,000 87,961,576 Activity in the options outstanding under the employee stock option scheme is as Fiscal years ended March 31, 2022 2023 2024 Options Weighted Options Weighted Options Weighted Options outstanding, beginning of period 168,168,760 Rs. 1,063.79 158,106,016 Rs. 1,175.65 151,682,461 Rs. 1,264.86 Addition on account of eHDFC merger — — — — 48,559,681 1,124.77 Granted 25,628,600 1,427.29 30,480,145 1,425.69 24,384,690 1,611.84 Exercised (32,764,494 ) 796.52 (34,201,810 ) 998.73 (46,304,966 ) 1,133.72 Forfeited (2,639,100 ) 1,231.84 (2,175,700 ) 1,274.53 (2,198,002 ) 1,363.80 Lapsed (287,750 ) 870.34 (526,190 ) 1,033.65 (464,440 ) 1,151.88 Options outstanding, end of period 158,106,016 Rs. 1,175.65 151,682,461 Rs. 1,264.86 175,659,424 Rs. 1,307.93 Options exercisable, end of period 65,321,116 Rs. 1,036.49 65,124,916 Rs. 1,162.96 98,829,856 Rs. 1,201.65 Weighted average fair value of options granted during the year Rs. 415.12 Rs. 548.11 Rs. 607.28 Activity in the RSUs outstanding under the various Employees’ Stock Incentive Master Scheme as Fiscal years ended March 31, 2023 2024 Units Weighted average Units Weighted average RSUs outstanding, beginning of period —  Rs. —  2,891,000 Rs. 1.0 Granted 2,891,000 1.00 9,354,224 1.0 Exercised —  —  (316,620 ) 1.0 Forfeited —  —  (203,500 ) 1.0 Lapsed —  (3,300 ) 1.0 RSUs outstanding, end of period 2,891,000 1.00 11,721,804 1.0 RSUs exercisable, end of period —  376,070 1.0 Weighted average fair value of RSUs granted during the year Rs. 1,382.34 Rs. 1,565.43 The following summarizes information about stock options outstanding as of March 31, 2024: As of March 31, 2024 Plan Range of exercise price Number of Weighted Weighted Plan E Rs. 1,636.9 (or US$ 19.64) 5,075,360.0 5.92 Rs. 1,636.9 Plan F Rs. 716.60 to Rs. 1,636.90 (or US$ 8.60 to US$ 19.64) 15,551,708.0 4.84 Rs. 1,458.3 Plan G Rs. 882.85 to Rs. 1,673.10 (or US$ 10.59 to US$ 20.08) 115,413,810.0 2.66 Rs. 1,333.8 eHDFC Rs. 160.79 to Rs. 1,535.27 (or US$ 1.93 to US$ 18.42) 39,618,546.0 3.48 Rs.  1,131.5 The following summarizes information about RSUs outstanding as of March 31, 2024: As of March 31, 2024 Plan Range of exercise price Number of Weighted Weighted ESIS 2022 Rs. 1.00 (or US$ 0) 11,721,804 2.65 1.00 The intrinsic value, of options exercised during the years ended March 31, 2022, March 31, 2023 and March 31, 2024 at the grant date was nil, Rs. 0.5 million and Rs. 5,249.6 million and at the exercise date was Rs. 22,077.7 million, Rs. 20,891.2 million and Rs. 14,548.0 million, respectively. The aggregate intrinsic value as of the grant date and as of March 31, 2024 attributable to options which are outstanding as on March 31, 2024 was Rs. 22,732.3 million (previous year Rs. 13.3 million) and Rs. 28,677.5 million (previous year Rs. 52,286.4 million), respectively. The aggregate intrinsic value as of the grant date and as of March 31, 2024 attributable to options exercisable as on March 31, 2024 was Rs. 20,373.6 million (previous year Rs. 0.5 million) and was Rs. 24,363.8 million (previous year Rs. 29,084.2 million), respectively. Total stock compensation cost recognized for the ESOP’s under these plans was Rs. 13,874.5 million, Rs. 13,132.8 million and Rs. 17,379.5 million during the fiscal years ended March 31, 2022, March 31, 2023 and March 31, 2024, respectively. Income tax benefit of Rs 5,062.8 million was recognized with respect to stock compensation costs recognized during the fiscal year March 31, 2024. The tax benefit from options exercised during the fiscal year March 31, 2024 is Rs. 5,561.5 million. 86,557,545 1,341.5 ) The intrinsic value, of RSUs exercised during the fiscal year ended March 31, 2024 at the grant date was 441.6 million. The aggregate intrinsic value as of the grant date and as of March 31, 2024 attributable to RSUs which are outstanding as on March 31, 2024 was Rs. 18,122.0 million and Rs. 16,960.3 million, respectively. The aggregate intrinsic value as of the grant date and as of March 31, 2024 attributable to RSUs exercisable as on March 31, 2024 was Rs. million Rs. million, million during the fiscal year ended March 31, 2024. As of March 31, 2024, there were unvested RSUs with weighted average exercise price of Rs. and the aggregate intrinsic value at the grant date and as of March 31, 2024 was Rs. million and Rs. million, respectively. As of March 31, 2024, the total estimated compensation cost for the RSUs to be recognized in future periods was Rs. million. This is expected to be recognized over a weighted average period of 1.93 years. HDFC Life Insurance Company Limited HDFC Life has granted options of its equity shares to employees under the various schemes and certain schemes are administered under HDFC Life employee stock option trust and certain schemes by the company. The exercise price of the options granted is defined in respective ESOS schemes. Total number of outstanding options is as of March 31, 2024 of which are exercisable. HDFC Asset Management Company Limited HDFC AMC has granted options of its equity shares to employees and directors of company under the various schemes. The exercise price of the options granted was based on latest available closing price of the shares of the HDFC AMC on National Stock Exchange of India Limited. Total number of outstanding options is 31, HDFC Capital Advisors Limited HDFC Capital Advisors has granted options of its equity shares to employees under the schemes ESOP-2021. The exercise price of the options granted was determined by an independent valuer appointed by the Board of Directors Total number options 31, HDFC Securities Limited The shareholders of the HDFC Securities Limited (“HSL”) approved a stock option scheme (viz., ESOS - II) in February 2017 (“Company Options”). Under the terms of the scheme, HSL issues stock options of its equity shares to employees, whole time director, managing director and directors (excluding Independent Directors) of HSL, each of which is convertible into one equity share. ESOS – II provides issuance of the options at the recommendation of compensation committee of the Board of Directors. The exercise price of the options granted was determined by considering the average price of two independent valuer reports. Total number options 31, HDB Financial Services Limited The shareholders of HDB Financial Services have approved issuance of options under Employee Stock Option (ESOP) Scheme. Under the term of scheme the company may issue stock options of its equity shares to employees and directors of the company based on approval from Nomination and Remuneration Committee (NRC), Total number options 31,

Retirement benefits

Retirement benefits	12 Months Ended
	Mar. 31, 2024
Retirement benefits	24. Retirement benefits Gratuity In accordance with Indian law, the Bank provides for gratuity, a defined benefit retirement plan, covering eligible employees. The plan provides for lump sum payments to vested employees at retirement, resignation, death while in employment or on termination of employment in an amount equivalent to 15 days’ eligible salary ( until the the The following table sets out the funded status of the gratuity plan and the amounts recognized in the Bank’s consolidated financial statements as of March 31, 2023 and March 31, 2024: As of March 31, 2023 2024 2024 (In millions) Change in benefit obligations: Projected benefit obligation (“PBO”), beginning of the period Rs. 10,688.7 Rs. 11,491.6 US$ 137.9 On merger of eHDFC —  5,421.2 65.0 Service cost 1,398.6 1,968.8 23.6 Interest cost 773.4 981.3 11.8 Actuarial(gains)/ losses (252.4 ) (303.0 ) (3.6 ) Benefits paid (1,116.7 ) (1,968.0 ) (23.6 ) Projected benefit obligation, end of the period 11,491.6 17,591.9 211.1 Change in plan assets: Fair value of plan assets, beginning of the period 10,019.3 10,916.1 131.0 Fair value of plan assets - Addition on account of acquisition of HDFC Ltd 5,121.2 61.4 Expected return on plan assets 668.2 1,036.1 12.4 Actuarial gains/(losses) (390.0 ) 2,893.5 34.7 Actual return on plan assets 278.2 3,929.6 47.1 Employer contributions 1,735.3 717.9 8.6 Benefits paid (1,116.7 ) (1,733.0 ) (20.8 ) Fair value of plan assets, end of the period 10,916.1 18,951.8 227.3 Funded Status Rs. (575.5 ) Rs. 1,359.9 US$ 16.2 The Bank’s expected contribution to the gratuity fund for the next fiscal year is estimated at Rs. 1,746.9 million. The accumulated benefit obligation as of March 31, 2023 and March 31, 2024 was Rs. 8,294.7 million and Rs. 12,858.7 million, respectively. The vested accumulated benefit obligation as on March 31, 2023 and March 31, 2024 was Rs. 7,519.8 million and Rs. 11,691.6 million, respectively. Net gratuity cost for the years ended March 31, 2022, March 31, 2023 and March 31, 2024 comprised the following components: Fiscal years ended March 31, 2022 2023 2024 2024 (In millions) Service cost Rs. 1,268.0 Rs. 1,398.6 Rs. 1,968.8 US$ 23.6 Interest cost 631.2 773.4 981.3 11.8 Expected return on plan assets (574.1 ) (668.2 ) (1,036.1 ) (12.4 ) Actuarial (gains)/losses (497.7 ) 137.6 (3,196.5 ) (38.4 ) Net gratuity cost Rs. 827.4 Rs. 1,641.4 Rs. (1,282.5 ) US$  (15.4 ) The assumptions used in accounting for the gratuity plan are set out below: Fiscal years ended March 31, 2022 2023 2024 (% per annum) Discount rate ( ) 5.1-7.3 5.1-7.9 7.2-8.3 Rate of increase in compensation levels of covered employees 6.0-11.0 6.0-11.0 3.0-15.0 Rate of return on plan assets 5.1-7.0 5.1-7.2 6.5-7.4 Mortality rates used are based on the published “Indian Assured Lives Mortality (2012-2014) Ultimate” table ( ) Weighted average assumptions used to determine both benefit obligations and net periodic benefit cost. The rate of return on plan assets is based on historical returns, the current market conditions, anticipated future assets allocation and expected future returns. The rate of return on plan assets represents a long-term average view of the expected return. The following benefit payments, which includes benefits attributable to expected future service, as appropriate, are expected to be paid. Fiscal years ending March 31, Benefit payments In millions) 202 5 Rs. 2,261.8 202 6 1,718.4 202 7 1,575.0 202 8 1,497.5 202 9 1,384.2 20 30 4 6,572.2 The expected benefit payments are based on the same assumptions used to measure the Bank’s benefit obligations as of March 31, 2024. The gratuity contributions of the Bank which are administered by a trust As of March 31, 2024 Funds managed ( ) Funds managed ( ) Funds Government securities 77.2 % 46.9 % 45.6 % Debenture and bonds 4.5 % 12.9 % 32.8 % Equity securities 10.3 % 39.2 % 15.6 % Other 8.0 % 1.0 % 6.0 % Total 100.0 % 100.0 % 100.0 % ( ) The data pertaining to plan investment assets measured at fair value by level and total at March 31, 2024 are provided separately. Pension In respect of pensions payable to certain eCBoP employees, which are payable pursuant to a defined benefit scheme, the Bank contributes 10% of basic salary to a pension fund set up by the Bank and administered by the board of trustees, and the balance amount is provided based on an actuarial valuation at the balance sheet date conducted by an independent actuary. In respect of employees who have moved to a cost to company (“CTC”) driven compensation structure and have completed services up to 15 years as on the date of movement to a CTC driven compensation structure, any contribution made until such date, and any additional one-time contribution made for employees (who have completed more than 10 years but less than 15 years) stand frozen and will be converted into an annuity on separation after a lock-in-period of two years. Hence, for this category of employees, liability stands frozen and no additional provision is required except for interest, if any. In respect of employees who accepted the offer and have completed services for more than 15 years, the pension would be paid based on the employee’s salary as of the date of movement to a CTC driven compensation structure and a provision is made based on an actuarial valuation at the balance sheet date conducted by an independent actuary. The following table sets out the funded status of the pension plan As of March 31, 2023 2024 2024 (In millions) Change in benefit obligations: Projected benefit obligation (“PBO”), beginning of the period Rs. 840.9 Rs. 1,018.0 US$ 12.2 Plan amendment (prior service cost) —  —  —  Service cost 18.5 16.0 0.2 Interest cost 57.3 76.4 0.9 Actuarial (gains)/losses 221.4 (24.6 ) (0.3 ) Benefits paid (120.1 ) (98.5 ) (1.2 ) Projected benefit obligation, end of the period 1018.0 987.3 11.8 Change in plan assets: Fair value of plan assets, beginning of the period 8.7 3.0 0.0 Expected return on plan assets 0.4 6.5 0.1 Actuarial gains/(losses) 2.2 8.8 0.1 Actual return on plan assets 2.6 15.3 0.2 Employer contributions 111.8 241.7 2.9 Benefits paid (120.1 ) (98.5 ) (1.2 ) Fair value of plan assets, end of the period 3.0 161.5 1.9 Funded Status Rs. (1,015.0 ) Rs. (825.8 ) US$ (9.9 ) The Bank’s expected contribution to the pension fund for the next fiscal year is estimated at Rs. 73.3 million. The accumulated benefit obligation as of March 31, 2023 and March 31, 2024 was Rs. 528.6 million and Rs. 637.6 million, respectively. The vested accumulated benefit obligation as of March 31, 2023 and March 31, 2024 was Rs. 527.5 million and Rs. 352.4 million, respectively. Net pension cost for the fiscal years ended March 31, 2022, March 31, 2023 and March 31, 2024 comprised the following components: As of March 31, 2022 2023 2024 2024 (In millions) Service cost Rs. 93.0 Rs. 18.5 Rs. 16.0 US$ 0.2 Interest cost 55.8 57.3 76.4 0.9 Expected return on plan assets (0.4 ) (0.4 ) (6.5 ) (0.1 ) Actuarial (gains)/losses 32.1 219.2 (33.4 ) (0.4 ) Net pension cost Rs. 180.5 Rs. 294.6 Rs. 52.5 US$ 0.6 The assumptions used in accounting for the pension plan are set out below: Fiscal years ended March 31, 2022 2023 2024 (% per annum) Discount rate ( ) 7.3 7.9 7.7 Rate of increase in compensation levels of covered employees 7.0 10.0 7.0 Rate of return on plan assets 6.5 6.5 6.5 Mortality rates used are based on the published “Indian Assured Lives Mortality (2012-2014) Ultimate” table. ( ) Weighted average assumptions used to determine both benefit obligations The following benefit payments, which include benefits attributable to expected future service, as appropriate, are expected to be paid. Fiscal years ending March 31, Benefit payments (In millions) 202 5 Rs. 94.9 202 6 72.1 202 7 80.3 202 8 81.8 202 9 76.8 20 30 4 756.9 The expected benefits are based on the same assumptions used to measure the Bank’s benefit obligations as of March 31, 2024. The retirement funds of a section of the employees are managed by a trust set up for the purpose. The trust essentially manages the defined retirement benefit plans belonging to certain employees. The funds are mainly invested in government securities and other corporate bonds. The weighted-average asset allocation of said plan assets for the pension benefits as of March 31, 2024 is as follows: Asset category Funds managed Government securities 89.6 % Debenture and bonds 10.4 % Other —  Total 100.0 % For information on fair value measurements, including descriptions of Levels 1, 2 and 3 of the fair value hierarchy and the valuation methods employed by the Bank, see note 3 2 Plan investment assets for gratuity funds and the pension fund measured at fair value by level and in total as of March 31, 2023 and March 31, 2024 are summarized in the table below. As of March 31, 2023 As of March 31, 2024 Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 (In millions) Funds managed by insurance company (1) Rs. —  Rs. —  Rs. 864.5 Rs. —  Rs. —  Rs. 859.1 Funds managed by insurance company (2) —  9,829.4 —  —  14,478.3 —  Funds managed by trust — Government securities —  60.8 —  —  1,792.6 —  — Debenture and bonds —  54.8 —  —  1,200.9 —  — Others 109.6 —  —  581.9 200.5 —  Total Rs.  109.6 Rs.  9,945.0 Rs.  864.5 Rs. 581.9 Rs. 17,672.3 Rs. 859.1 US$ 7.0 US$ 212.1 US$ 10.4 The table below presents a reconciliation of all Plan investment assets measured at fair value using significant unobservable inputs (Level 3) during the fiscal years ended March 31, 2023 and March 31, 2024. Funds managed by Insurance 2023 2024 2024 (In millions) Particulars Opening balance Rs. 779.8 Rs. 864.5 US$ 10.4 On merger of eHDFC — 25.1 0.3 Realized interest credited to fund 54.8 64.0 0.8 Contribution during the period 148.6 70.9 0.9 Amount paid towards claim (118.7 ) (165.4 ) (2.0 ) Closing balance Rs. 864.5 Rs.  859.1 US$  10.4 Superannuation Eligible employees of the Bank are entitled to receive retirement benefits under the Bank’s superannuation fund. The superannuation fund is a defined contribution plan under which the Bank annually contributes a sum equivalent to 13% of the employee’s eligible annual salary ( Provident fund In accordance with Indian law, eligible employees of the Bank are entitled National Pension Scheme In respect of employees who opt for contribution to the National Pension Scheme, the Bank contributes a certain percentage of the basic salary of employees to the aforesaid scheme, a defined contribution plan, which is managed and administered by pension fund management companies. The Bank has no liability other than its contribution, and recognizes such contributions as an expense in the year incurred. The amount contributed being Rs. 57.2 million, Rs. 2022, March 31, Compensated absences The Bank has provided for unutilized leave balances as on March 31, 2024 standing to the credit of each employee on an actuarial valuation conducted by an independent actuary.

Financial instruments

Financial instruments	12 Months Ended
	Mar. 31, 2024
Financial instruments	2 5 Foreign exchange and derivative contracts The Bank enters into forward exchange contracts, currency options, forward rate agreements, currency swaps and rupee interest rate swaps, interest rate futures with inter-bank participants on its own account and for customers. These transactions enable customers to transfer, modify or reduce their foreign exchange and interest rate risks. Forward exchange contracts are commitments to buy or sell foreign currency at a future date at the contracted rate. Currency swaps are commitments to exchange cash flows by way of interest in one currency against another currency and exchange of principal amount at maturity based on predetermined rates. Interest rate swaps are commitments to exchange fixed and floating rate interest cash flows. A forward rate agreement gives the buyer the ability to determine the underlying rate of interest for a specified period commencing on a specified future date (the settlement date) when the settlement amount is determined as the difference between the contracted rate and the market rate on the settlement date. Currency options give the buyer the right, but not an obligation, to buy or sell specified amounts of currency at agreed rates of exchange on or before a specified future date. Interest rate futures are a futures contract with an interest-paying underlying product. A contract is an agreement between a buyer and a seller for the delivery of an interest-bearing asset in the future. The market and credit risk associated with these products, as well as the operating risks, are similar to those relating to other types of financial instruments. Market risk is the exposure created by movements in interest rates and exchange rates during the tenure of the transaction. The extent of market risk affecting such transactions depends on the type and nature of the transaction, the value of the transaction and the extent to which the transaction is uncovered. Credit risk is the exposure to loss in the event of default by counterparties. The extent of loss on account of a counterparty default will depend on the replacement value of the contract at the ongoing market rates. The Bank uses its pricing models to determine the fair value of its derivative financial instruments. The Bank records credit risk valuation adjustments on derivative financial instruments in order to reflect the credit quality of the counterparties and its own credit quality. The Bank calculates valuation adjustments on derivatives based on observable market credit risk spreads. The following table presents the aggregate notional principal amounts of the Bank’s outstanding forward exchange and other derivative contracts as of March 31, 2023 and March 31, 2024, together with As of March 31, 2023 Notional Gross Assets Gross Liabilities Net Fair Value (In millions) Interest rate derivatives Rs.  5,974,019.2 Rs.  41,148.2 Rs.  36,627.4 Rs.  4,520.8 Forward rate agreements 140,693.0 1,848.4 541.4 1,307.0 Currency options 257,641.1 1,402.4 1,578.3 (175.9 ) Currency swaps 372,114.3 21,753.7 7,213.4 14,540.3 Forward exchange contracts 9,052,221.4 55,596.7 52,823.0 2,773.7 Total Rs.  15,796,689.0 Rs.  121,749.4 Rs.  98,783.5 Rs.  22,965.9 As of March 31, 2024 Notional Gross Assets Gross Liabilities Net Fair Value Notional Net Fair Value (In millions) Interest rate derivatives Rs.  7,834,342.2 Rs.  53,970.3 Rs.  63,112.8 Rs.  (9,142.5 ) US$ 94,004.6 US$ (109.7 ) Forward rate agreements 592,414.5 10,071.3 4,514.9 5,556.4 7,108.4 66.7 Currency options 223,904.8 588.1 873.2 (285.1 ) 2,686.6 (3.4 ) Currency swaps 493,708.2 11,754.5 4,440.2 7,314.3 5,924.0 87.8 Forward exchange contracts 12,125,527.9 32,654.3 36,468.8 (3,814.5 ) 145,494.7 (45.8 ) Total Rs.  21,269,897.6 Rs.  109,038.5 Rs.  109,409.9 Rs.  (371.4) US$ 255,218.3 US$ (4.4 ) The Bank has not designated the above contracts as accounting hedges and, accordingly, the contracts are recorded at fair value on the balance sheet with changes in fair value recorded in net income. The gross assets and the gross liabilities are recorded in “other assets” and “accrued expenses and other liabilities”, respectively. The following table summarizes certain information related to derivative amounts recognized in income: Non-interest revenue, net– 2022 2023 2024 2024 (In millions) Interest rate derivatives Rs.  3,207.7 Rs.  5,921.5 Rs.  1,762.6 US$ 21.2 Forward rate agreements 1,374.1 (2.0 ) 2,089.6 25.1 Currency options 167.3 1,200.3 194.0 2.3 Currency swaps (1,682.0 ) 1,609.1 10,242.9 122.9 Forward exchange contracts (1,645.1 ) 6,637.2 4,269.4 51.2 Total gains/(losses) Rs.  1,422.0 Rs.  15,366.1 Rs.  18,558.5 US$  222.7 Offsetting The following table shows the impact of netting arrangements on derivative financial instruments, repurchase and reverse repurchase agreements that are subject to enforceable master netting arrangements or similar agreements, but are not offset in accordance with ASC 210-20-45 and ASC 815-10-45. The Bank enters into International Swaps and Derivatives Association Transactions with counterparties for Securities sold under agreements to repurchase (“repos”) and Securities purchased under agreements to resell (“reverse repos”) are settled through the Clearing Corporation of India Limited (“CCIL”), a centralized clearinghouse. Collaterals received or pledged are comprised of highly liquid investments. For undertaking the above transactions, power of attorney is executed by the Bank and the counterparties in favor of CCIL to liquidate the securities pledged in the event of default. As of March 31, 2023 Amounts subject to enforceable netting arrangements Effects of offsetting on balance sheet Related amounts not offset Gross Amounts Amounts Net amounts Financial Financial Net amount (In millions) Financial assets Derivative assets Rs.  121,749.4 Rs.  —  Rs.  121,749.4 Rs.  73,045.2 Rs.  19,402.2 Rs.  29,302.0 Securities purchased under agreements to resell 455,275.4 —  455,275.4 —  455,275.4 —  Financial liabilities Derivative liabilities Rs.  98,783.5 Rs.  —  Rs.  98,783.5 Rs.  73,045.2 Rs.  5,084.6 Rs.  20,653.7 Securities sold under repurchase agreements —  —  —  —  —  —  Long-term debt 90,200.0 —  90,200.0 —  90,200.0 —  (1) Comprised of securities and cash collaterals. These amounts are limited to the asset/liability balance, and accordingly, do not include excess collateral received/pledged. As of March 31, 2024 Amounts subject to enforceable netting arrangements Effects of offsetting on balance sheet Related amounts not offset Gross Amounts Amounts Net amounts Financial Financial Net amount Net amount (In millions) Financial assets Derivative assets Rs.  109,038.5 Rs.  — Rs.  109,038.5 Rs.  58,377.4 Rs.  15,690.4 Rs.  34,970.7 US$  419.6 Securities purchased under agreements to resell 34,178.3 —  34,178.3 —  34,178.3 —  —  Financial liabilities Derivative liabilities Rs.  109,409.9 Rs.  —  Rs.  109,409.9 Rs.  58,377.4 Rs.  24,274.5 Rs.  26,758.0 US$ 321.1 Securities sold under repurchase agreements 56,541.0 — 56,541.0 —  56,541.0 — — (1) Comprised of securities and cash collaterals. These amounts are limited to the asset/liability balance, and accordingly, do not include excess collateral received/pledged. Guarantees As a part of its commercial banking activities, the Bank has issued guarantees and documentary credits, such as letters of credit, to enhance the credit standing of its customers. These generally represent irrevocable assurances that the Bank will make payments in the event that the customer fails to fulfil its financial or performance obligations. Financial guarantees are obligations to pay a third-party beneficiary where a customer fails to make payment towards a specified financial obligation. Performance guarantees are obligations to pay a third-party beneficiary where a customer fails to perform a non-financial contractual obligation. The tenure of the guarantees issued or renewed by the Bank is normally in line with requirements on a case-by-case basis as may be assessed by the Bank. The remaining tenure of guarantees The credit risk associated with these products, as well as the operating risks, is similar to those relating to other types of financial instruments. In accordance with FASB ASC 460-10, the Bank has recognized a liability of Rs. 7,041.8 million as of March 31, 2023 and of Rs. 9,066.2 million as of March 31, 2024, in respect of guarantees issued or modified. Details of guarantees and documentary credits outstanding are set out below: As of March 31, 2023 2024 2024 (In millions) Nominal values: Bank guarantees: Financial guarantees Rs.  494,191.3 Rs.  610,381.3 US$ 7,324.0 Performance guarantees 519,953.0 653,452.8 7,840.8 Documentary credits 614,555.5 710,083.8 8,520.3 Total Rs.  1,628,699.8 Rs.  1,973,917.9 US$  23,685.1 Estimated fair value: Guarantees Rs.  (7,041.8 ) Rs.  (9,066.2 ) US$  (108.8 ) Documentary credits (869.3 ) (1,018.9 ) (12.2 ) Total Rs.  (7,911.1 ) Rs.  (10,085.1 ) US$  (121.0 ) As part of its risk management activities, the Bank continuously monitors the creditworthiness of customers as well as guarantee exposures. If a customer fails to perform a specified obligation, a beneficiary may draw upon the guarantee by presenting documents in compliance with the guarantee. In that event, the Bank makes payment on account of the defaulting customer to the beneficiary up to the full notional amount of the guarantee. The customer is obligated to reimburse the Bank for any such payment. If the customer fails to pay, the Bank liquidates any collateral held and sets off accounts; if insufficient collateral is held, the Bank recognizes a loss. Margins in the form of cash and fixed deposit available to the Bank to reimburse losses realized under guarantees amounted to Rs. 222.0 billion and Rs. 298.5 billion as of March 31, 2023 and March 31, 2024, respectively. Other property or security may also be available to the Bank to cover losses under these guarantees. Undrawn commitments The Bank has outstanding undrawn commitments to provide loans and financing to customers. These commitments aggregated to Rs. 372.3 billion and Rs. 1,175.5 billion (US$ 14.1 billion) as of March 31, 2023 and March 31, 2024, respectively. Among other things, the making of a loan is subject to a review of the creditworthiness of the customer at the time the customer seeks to borrow, at which time the Bank has the unilateral right to decline to make the loan. If the Bank were to make such loans, the interest rates would be dependent on the lending rates in effect when the loans were disbursed. Further, the Bank has unconditional cancellable commitments aggregating to Rs. 7,273.0 billion and Rs. 9,108.6 billion (US$ 109.3 billion) as of March 31, 2023 and March 31, 2024, respectively. The allowance for credit losses included in accrued expenses and other liabilities on off-balance sheet credit exposures and undrawn commitments is as follows: As of March 31, 2023 2024 2024 (In millions) Allowance for credit losses, beginning of the period Rs.  6,087.6 5,818.7 US$ 69.8 Net provision for credit exposures (268.9 ) 1,421.8 17.1 Allowance for credit losses, end of the period Rs.  5,818.7 7,240.5 US$  86.9

Estimated fair value of financi

Estimated fair value of financial instruments	12 Months Ended
	Mar. 31, 2024
Estimated fair value of financial instruments	26. Estimated fair value of financial instruments The Bank’s financial instruments include financial assets and liabilities recorded on the balance sheet, including instruments such as foreign exchange and derivative contracts. Management uses its best judgment in estimating the fair value of the Bank’s financial instruments; however, there are inherent weaknesses in any estimation technique. Therefore, for substantially all financial instruments, the fair value estimates presented herein are not necessarily indicative of all the amounts the Bank could have realized in a sales transaction as of March 31, 2023 and March 31, 2024, respectively. The estimated fair value amounts as of March 31, 2023 and March 31, 2024 have been measured as of the respective year ends, and have not been re-evaluated or updated for purposes of these financial statements subsequent to those respective dates. As such, the estimated fair value of these financial instruments subsequent to the respective reporting dates may be different than the amounts reported at each year end. Financial instruments valued at carrying value The respective carrying values of certain on-balance-sheet financial instruments approximated their fair value. These financial instruments include cash and amounts due from banks, non-interest-bearing deposits in banks, securities purchased and sold under resale and repurchase agreements, accrued interest receivable, accrued interest payable, and certain other assets and liabilities that are considered financial instruments. Carrying values were assumed to approximate fair values for these financial instruments as they are short-term in nature and their recorded amounts approximate fair values or are receivable or payable on demand. Trading securities Trading securities are carried at fair value based on quoted market prices or market observable inputs. Available for sale securities AFS debt securities are carried at fair value. Such fair values were based on quoted market prices, where available. If quoted market prices did not exist, fair values were estimated using the market yield on the balance period to maturity on similar instruments and similar credit risks. The fair value of asset-backed and mortgage-backed securities is estimated based on revised estimated cash flows at each balance sheet date, discounted at current market pricing for transactions with similar risk. A reduction in the estimated cash flows of these instruments will adversely impact the value of these securities. A change in the timing of these estimated cash flows will also impact the value of these securities. Loans The fair values of consumer instalment loans and other consumer loans that do not reprice or mature frequently are estimated using discounted cash flow models. The discount rates are based on internal models. The fair value of loans would decrease (increase) in value based upon an increase (decrease) in discount rate. Since substantially all individual lines of credit and other variable rate consumer loans reprice frequently, with interest rates reflecting current market pricing, the carrying values of these loans approximate their fair values. The fair values of commercial loans that do not reprice or mature within relatively short time frames are estimated using discounted cash flow models. The discount rates are based on internal models. The fair value of loans would decrease (increase) in value based upon an increase (decrease) in discount rate. For commercial loans that reprice within relatively short time frames, the carrying values approximate their fair values. For purposes of these fair value estimates, the fair values of impaired loans were computed by deducting an estimated market discount from their carrying values to reflect the uncertainty of future cash flows. The fair values of loans that do not reprice or mature within relatively short time frames are estimated using discounted cash flow models and are classified as Level 3 as the input used for the valuation is internal credit spreads which is based on internal models and is considered unobservable. Loans that reprice within relatively short time frames, the carrying values approximate their fair values, accordingly it is classified as Level 2. Deposits The fair value of demand deposits, savings deposits, and money market deposits without defined maturities are the amounts payable on demand. For deposits with defined maturities, the fair values were estimated using discounted cash flow models that apply market interest rates corresponding to similar deposits and timing of maturities. The fair value of demand deposits, savings deposits, and money market deposits without defined Short-term borrowings The fair values of the Bank’s short-term debt were calculated based on a discounted cash flow model. The discount rates were based on yield curves appropriate for the remaining maturities of the instruments. Input used for fair valuation of the financial instrument is considered observable and hence the instruments are classified as level 2. Long-term debt The fair values of the Bank’s unquoted long-term debt instruments were calculated based on a discounted cash flow model. The discount rates were based on yield curves appropriate for the remaining maturities of the instruments. Input used for fair valuation of the financial instrument is considered observable and hence the instruments are classified as level 2. Term placements The fair values of term placements were estimated using discounted cash flow models. The discount rates were based on current market pricing for placements with similar characteristics and risk factors and hence the instruments are classified as level 2. Derivatives See note 25 Accrued interest receivable /payable. Considering short term nature of accrued interest receivable, carrying value is considered to approximate the fair value accordingly they are classified as level 2. Other Assets / Accrued expenses and other liabilities. Securities carried at fair value based on quoted market prices are classified as Level 1; other items in the nature of financial instruments are classified as level 2 as carrying value is reasonable estimate of fair value or the valuation input used is observable. Securities purchased under agreements to resell / Securities sold under repurchase agreements. Resale and repurchase agreements are classified as Level 2 because they are generally short A comparison of the fair value and carrying value of financial instruments is set out below: As of March 31, 2023 March 31, 2024 Estimated fair value Estimated fair value Carrying Level 1 Level 2 Level 3 Total Carrying Level 1 Level 2 Level 3 Total Carrying Estimated (In millions) Financial Assets: Cash and due from banks, and restricted cash Rs.  1,387,395.2 Rs.  1,387,395.2 Rs.  —  Rs.  —  Rs.  1,387,395.2 2,086,031.4 2,086,031.4 Rs.  —  Rs.  —  2,086,031.4 US$ 25,030.4 US$ 25,030.4 Investments held for trading 135,831.1 184.1 135,647.0 —  135,831.1 461,245.3 290,951.1 148,296.2 21,998.0 461,245.3 5,534.5 5,534.5 Investments available for sale debt securities 4,878,844.0 507,504.1 4,222,904.3 148,435.6 4,878,844.0 8,295,487.1 548,944.7 7,608,007.7 138,534.7 8,295,487.1 99,537.9 99,537.9 Securities purchased under agreements to resell 455,275.4 —  455,275.4 —  455,275.4 34,178.3 —  34,178.3 —  34,178.3 410.1 410.1 Loans 17,052,927.9 —  4,138,188.7 13,027,096.1 17,165,284.8 26,335,700.9 —  4,988,245.6 21,425,726.3 26,413,971.9 316,003.1 316,942.3 Accrued interest receivable 186,091.2 —  186,091.2 —  186,091.2 249,644.5 —  249,592.0 52.5 249,644.5 2,995.5 2,995.5 Separate a a —  —  —  —  —  955,416.3 808,309.4 147,106.9 —  955,416.3 11,464.1 11,464.1 Other assets 1,292,086.7 3,313.7 1,286,529.0 —  1,289,842.7 1,942,177.5 24,545.8 1,913,303.2 1,834.8 1,939,683.8 23,304.3 23,274.3 Financial Liabilities   Interest-bearing deposits 16,097,459.3 —  16,102,822.0 —  16,102,822.0 20,688,406.2 —  20,775,875.4 —  20,775,875.4 248,241.0 249,290.6 Non-interest-bearing deposits 2,729,176.3 —  2,729,176.3 —  2,729,176.3 3,079,829.4 —  3,079,829.4 —  3,079,829.4 36,955.0 36,955.0 Securities sold under repurchase agreements —  —  —  —  —  56,541.0 —  56,541.0 —  56,541.0 678.4 678.4 Short-term borrowings 1,089,897.5 —  1,088,380.5 —  1,088,380.5 1,313,737.1 —  1,314,424.4 —  1,314,424.4 15,763.6 15,771.8 Accrued interest payable 112,463.2 —  112,463.2 —  112,463.2 238,638.8 —  238,638.8 —  238,638.8 2,863.4 2,863.4 Long-term debt 2,054,436.4 —  2,045,541.9 —  2,045,541.9 6,648,772.0 —  6,639,457.7 —  6,639,457.7 79,778.9 79,667.1 Accrued expenses and other liabilities 567,643.6 —  567,643.6 —  567,643.6 690,851.5 —  688,513.7 2,337.8 690,851.5 8,289.6 8,289.6 Separate a l —  —  —  —  —  955,416.3 —  955,416.3 —  955,416.3 11,464.1 11,464.1 Liabilities on policies in force (*) —  —  —  —  —  55,544.1 —  55,544.1 —  55,544.1 666.5 666.5 (*) The liabilities on policies in force includes only the fair value of contracts that are classified as insurance contract

Segment information

Segment information	12 Months Ended
	Mar. 31, 2024
Segment information	2 7 The Bank operates in five reportable segments: wholesale banking, retail banking, insurance The retail banking segment serves retail customers through a branch network and other delivery channels. This segment raises deposits from customers and grant loans, provides credit cards and debit cards, and distributes third-party financial products, such as mutual funds and insurance to such customers. Revenues of the retail banking segment are derived from interest earned on retail loans, fees for banking services, profit from foreign exchange and derivative transactions and interest earned from other segments for surplus funds placed with those segments. Expenses of this segment are primarily comprised of interest expense on deposits, infrastructure and premises expenses for operating the branch network and other delivery channels, personnel costs, other direct overheads and allocated expenses. The Bank’s retail banking loan products also include loans to small and medium enterprises for commercial vehicles, construction equipment and other business purposes. Such grouping ensures optimum utilization and deployment of specialized resources in the retail banking business. The wholesale banking segment provides loans and transaction services to corporate customers. As discussed above, loans to small and medium enterprises for commercial vehicles, construction equipment and other business purposes are included in the retail banking segment. Revenues of the wholesale banking segment consist of interest earned on loans given to corporate customers, investment income from credit substitutes, interest earned on the cash float arising from transaction services, fees from such transaction services and profits from foreign exchange and derivative transactions with wholesale banking customers. The principal expenses of the segment consist of interest expense on funds borrowed from other segments, premises expenses, personnel costs, other direct overheads and allocated expenses. The treasury services segment undertakes trading operations on proprietary account (including investments in government securities), foreign exchange operations and derivatives trading both on proprietary account and customer flows and borrowings. Revenues of the treasury services segment primarily consist of fees and gains and losses from trading operations and of net interest revenue/expense from investments in government securities and borrowings. Revenues from foreign exchange and derivative operations and customer flows are classified under the retail or wholesale segments depending on the profile of the customer. The insurance services segment comprises the Life Insurance business which offers a wide range of individual and group insurance solutions such as Protection, Pension, Savings, Investment, Annuity and Health. Revenues from the insurance segment consists of premiums, investment income from managed assets, linked income (fund management charges, policy administration charges, mortality charges, surrender charge, discontinuance charges, reinstatement fees, etc) and other miscellaneous income. Expenses of this segment primarily comprise commission expenses, operating expenses related to insurance business, benefits paid, changes in valuation of actuarial liability and other direct overheads and allocated expenses. The others segment comprises businesses other than retail banking segment, wholesale banking segment, treasury services segment and insurance services segment. Segment income and expenses include certain allocations. Interest income is charged by a segment that provides funding to another segment, based on yields benchmarked to an internally developed composite yield curve which broadly tracks market-discovered interest rates. Directly identifiable overheads are attributed to a segment at actual amounts incurred. Indirect shared costs, principally corporate office expenses, are generally allocated to each segment on the basis of area occupied, number of staff, volume and nature of transactions. The wholesale banking segment includes unallocated tax balances and other items. Summarized segment information for the fiscal years ended Fiscal year ended March 31, 2022 2023 Retail Wholesale Treasury Total Retail Wholesale Treasury Total (In millions) Net interest income/ (expense) (external) Rs.  418,823.0 Rs.  297,694.0 Rs.  32,322.5 Rs.  748,839.5 Rs.  474,489.5 Rs.  367,857.6 Rs.  71,641.4 Rs.  913,988.5 Net interest income/ (expense) (internal) 141,001.2 (113,339.0 ) (27,662.2 ) —  168,806.2 (116,903.5 ) (51,902.7 ) —  Net interest revenue 559,824.2 184,355.0 4,660.3 748,839.5 643,295.7 250,954.1 19,738.7 913,988.5 Less: Provision for credit losses 122,622.6 4,356.9 —  126,979.5 86,920.2 (12,706.4 ) —  74,213.8 Net interest revenue, after provision for credit losses 437,201.6 179,998.1 4,660.3 621,860.0 556,375.5 263,660.5 19,738.7 839,774.7 Non-interest revenue 203,468.5 55,813.2 11,292.5 270,574.2 252,576.6 42,286.9 (3,477.0 ) 291,386.5 Non-interest expense (345,321.5 ) (25,544.1 ) (2,406.4 ) (373,272.0 ) (432,689.9 ) (34,261.7 ) (1,827.8 ) (468,779.4 ) Income before income tax Rs.  295,348.6 Rs.  210,267.2 Rs.  13,546.4 Rs.  519,162.2 Rs.  376,262.2 Rs.  271,685.7 Rs.  14,433.9 Rs.  662,381.8 Income tax expense Rs.  132,559.2 Rs.  166,117.4 Segment assets: Segment total assets Rs.  11,384,802.9 Rs.  8,106,671.0 Rs.  1,622,231.6 Rs.  21,113,705.5 Rs.  13,599,750.2 Rs.  9,274,409.1 Rs.  2,881,464.7 Rs.  25,755,624.0 Fiscal year ended March 31, 2024 Retail Banking Wholesale Treasury Insurance Others Total Total (In millions) Net interest income/(expense) (external) Rs.  624,203.3 Rs.   249,868.7 Rs.   265,306.7 Rs.  86,474.6 Rs.  22,150.1 Rs.  1,248,003.4 US$  14,974.9 Net interest income/(expense) (internal) 178,794.9 65,798.9 (244,593.8 ) —  —  —  —  Net interest revenue 802,998.2 315,667.6 20,712.9 86,474.6 22,150.1 1,248,003.4 14,974.9 Less: Provision for credit losses 118,900.0 14,163.1 —  —  —  133,063.1 1,596.6 Net interest revenue, after provision for credit losses 684,098.2 301,504.5 20,712.9 86,474.6 22,150.1 1,114,940.3 13,378.3 Non-interest revenue 276,151.7 24,303.9 11,784.3 418,250.0 8,441.0 738,930.9 8,866.5 Non-interest expense (548,753.1 ) (84,735.1 ) (6,278.2 ) (493,763.8 ) (14,882.0 ) (1,148,412.2 ) (13,779.8 ) Income before income tax Rs.  411,496.8 Rs.  241,073.3 Rs.   26,219.0 Rs.  10,960.8 Rs.   15,709.1 Rs.    705,459.0 US$ 8,465.0 Income tax expense Rs.   77,827.1 US$ 933.9 Segment assets: Segment total assets Rs.  23,256,928.8 Rs.  13,133,744.0 Rs.  2,731,823.5 Rs.   4,387,398.1 Rs.   608,678.6 Rs.  44,118,573.0 US$  529,380.6

Commitments and contingencies

Commitments and contingencies	12 Months Ended
	Mar. 31, 2024
Commitments and contingencies	2 8 Commitments and contingent liabilities other than for off balance sheet financial instruments (see note 2 5 Capital commitments The Bank has entered into committed capital contracts, principally for branch expansion and technology upgrades. The estimated amounts of contracts remaining to be executed on the capital account as of March 31, 2023 and March 31, 2024 aggregated Rs. 25,666.0 million and Rs. 45,346.5 million, respectively. Contingencies The Bank is party to various legal proceedings in the normal course of business. The Bank estimates the provision for contingencies which primarily include indirect taxes since no precedents exist which could be used as points of reference. The amount of claims against the Bank towards indirect taxes and other claims which are not acknowledged as debts as of March 31, 2024 amounted to Rs. 38,498.3 million (previous year Rs. 9,456.9 million). The Bank does not expect the outcome of these proceedings to have a material adverse effect on the Bank’s results of operations, financial condition or cash flows. The Bank intends to vigorously defend these claims. Although the results of other legal actions cannot be predicted with certainty, it is the opinion of management, after taking appropriate legal advice, that the likelihood of these claims becoming obligations of the Bank is remote and hence the resolution of these actions will not have a material adverse effect, if any, on the Bank’s business, financial condition or results of operations. Lease commitments The Bank is party to operating leases for certain of its office premises and employee residences, with a renewal at the option of the Bank. Operating lease right-of-use assets and lease liabilities were as follows: As of March 31, 2023 2024 2024 (In millions) Right-of-use assets Rs.  89,989.3 Rs.  121,302.5 US$  1,455.5 Lease liabilities 97,658.9 131,043.0 1,572.4 The total lease expenses were as follows: As of March 31, 2022 2023 2024 2024 (In millions) The total minimum lease expense during the year recognized in the consolidated statement of income Rs.  13,866.6 Rs.  17,591.4 Rs.  23,245.5 US$  278.9 The total operating cash flow for operating lease expenses during the fiscal years ended March 31, 2022, March 31, 2023 and March 31, 2024 was Rs. 14,295.7 million, R s. million and Rs. million (US$ million), respectively. The future minimum lease payments as of March 31, 2024 were Due in fiscal year ending March 31: Operating leases (In millions, except for weighted averages) 2025 Rs. 20,541.8 US$ 246.5 2026 20,162.6 241.9 2027 19,678.9 236.1 2028 18,817.6 225.8 2029 17,610.2 211.3 Thereafter 86,273.8 1,035.2 Total lease payments Rs. 183,084.9 US$ 2,196.8 Less: imputed interest 52,041.9 624.4 Total operating lease liabilities Rs. 131,043.0 US$ 1,572.4 Weighted average remaining lease term (in years) 10 .2 10 .2 Weighted average discount rate 7.25 % 7.25 % The Bank enters into lease agreements to obtain the right-of-use assets for its business operations, substantially all of which are premises. Lease liabilities and right-of-use assets are recognized when the Bank enters into operating leases and represent obligations and rights to use these assets over the period of the leases and are re-measured for modifications. Operating lease liabilities include fixed payments for the contractual duration of the lease, adjusted for renewals or terminations. The lease agreements entered into by the Bank do not include any material residual value guarantees and material restrictive covenants. The lease payments are discounted using a rate determined when the lease is recognized. In general, the Bank does not know the discount rate implicit in the lease, and so the Bank estimates a discount rate that the Bank believes approximates a collateralized borrowing rate for the estimated duration of the lease term. At lease commencement, lease liabilities are recognized based on the present value of the remaining lease payments and discounted using the incremental borrowing rate. Right-of-use assets are reported in other assets on the consolidated balance sheet and related lease liabilities are reported in accrued expenses and other liabilities. The amortization of operating lease right-of-use assets and the accretion of operating lease liabilities are reported together as fixed lease expenses and are included in non-interest expense- premises and equipment. The lease expense is recognized on a straight-line basis over the life of the lease. The lease agreements entered into by the Bank generally have renewal and escalation clauses. These agreements also in general permit the Bank to terminate the lease arrangement within a certain period of notice of termination. The Bank does not include renewal or termination options in the establishment of the lease term when it is not reasonably certain that it will exercise them. The Bank has elected to exclude leases with terms of less than one year from the operating lease right-of-use assets and lease liabilities. The related short-term lease expense is included in non-interest expense- premises and equipment. The Bank accounted for lease-related concessions obtained as a result of the COVID-19 pandemic in accordance with guidance in Topic 842. As of March 31, 2024, the Bank had additional undiscounted operating lease commitments of Rs. 1,002.6 million, predominantly for premises, with leases which have not yet commenced. These leases are expected to commence by April 2024 and have lease terms ranging from 2 to 21 years. Reward points The movement in provision for credit card and debit card reward points as of March 31, 2023 and March 31, 2024 is as follows: As of March 31, 2023 2024 2024 (In millions) Opening provision of reward points Rs. 6,359.1 Rs. 6,963.2 US$ 83.6 Provision made during the year 5,537.3 7,921.1 95.0 Utilization/write back of provision (4,901.3 ) (6,248.8 ) (75.0 ) Effect of change in rate of accrual of reward points (31.9 ) —  —  Closing provision of reward points Rs. 6,963.2 Rs. 8,635.5 US$ 103.6

Related party transactions

Related party transactions	12 Months Ended
	Mar. 31, 2024
Related party transactions	2 9 Until eHDFC share capital of eHDFC by way of amalgamation at the acquisition date (the “Transaction”). Consequently, subsidiaries of eHDFC became subsidiaries/ associate of HDFC Bank. The Bank enters into transactions with its related parties, such as providing banking services, sharing costs and service providers, purchasing services, making joint investments, and borrowing from related parties and subletting premises. The Bank is prohibited from making loans to companies with which it has directors in common. The Bank, being an authorized dealer, deals in foreign exchange and derivative transactions with certain parties which include the principal owner and related companies. The foreign exchange and derivative transactions are undertaken in line with the RBI guidelines. The Bank’s related party balances and transactions are in the normal course of business and are summarized as follows: Balances payable to related parties are as follows: As of March 31, 2023 2024 Principal Others Total Principal Others Total Total (In millions) Balances in non-interest-bearing deposits Rs.  25,637.8 Rs.  8,715.1 Rs.  34,352.9 Rs.  —  Rs.  2,522.6 Rs.  2,522.6 US$  30.3 Balances in interest-bearing deposits 1,755.1 1,611.9 3,367.0 —  4,006.3 4,006.3 48.1 Accrued expenses and other liabilities 773.5 —  773.5 —  —  —  —  Total Rs.  28,166.4 Rs.  10,327.0 Rs.  38,493.4 Rs.  —  Rs.  6,528.9 Rs.  6,528.9 US$  78.4 Balances receivable from related parties are as follows: As of March 31, 2023 2024 Principal Others Total Principal Others Total Total (In millions) Loans Rs.  —  Rs.  7.5 Rs.  7.5 Rs.  —  Rs.  34,504.5 Rs.  34,504.5 US$  414.0 Other assets 748.0 2,167.3 2,915.3 —  1,878.6 1,878.6 22.5 Investments available for sale securities —  —  —  —  28,364.6 28,364.6 340.3 Total Rs.  748.0 Rs.  2,174.8 Rs.  2,922.8 Rs. —  Rs.  64,747.7 Rs.  64,747.7 US$  776.8 Purchase of property and equipment from related parties for the fiscal years ended March 31, 2023 and 2024 were nil. Purchase and sale of investments from Others for the fiscal year ended March 31, 2024 were Rs. 316.7 million (previous year Rs. 256.8 million) and Rs. 8,859.5 million (previous year Rs. 20,447.7 million), respectively. Investments of Others in the Bank’s subordinated debt for the fiscal year ended March 31, 2024 were Rs. 10,241 million (previous year Rs. 7,850.0 million). Included in the determination of net income Fiscal year ended March 31, 2022 2023 2024 Principal Others Total Principal Others Total Principal Others Total Total (In millions) Non-interest revenue-Fees and commissions Rs.  4,639.3 Rs.  22,939.5 Rs.  27578.8 Rs.  5,888.2 Rs.  26,766.6 Rs.  32,654.8 Rs.  1,670.2 Rs.  8,205.3 Rs.  9,875.5 US$  118.5 Interest and Dividend revenue —  0.1 0.1 —  0.1 0.1 —  3,242.9 3,242.9 38.9 Interest expense-Deposits (204.3 ) (82.2 ) (286.5 ) (95.3 ) (606.1 ) (701.4 ) 30.6 115.4 146.0 1.8 Non-interest expense-Administrative and other (7,182.4 ) (4,558.9 ) (11,741.3 ) (8,631.1 ) (5,524.8 ) (14,155.9 ) (2,424.6 ) (4,140.1 ) (6,564.7 ) (78.8 ) Non-interest expense-Premises and equipment (19.2 ) —  (19.2 ) (15.6 ) —  (15.6 ) (0.5 ) (1.2 ) (1.7 ) —  Interest Expenses-Others —  —  —  —  —  —  —  514.7 514.7 6.2 Non-interest revenue-Others —  —  —  —  —  —  —  78.0 78.0 0.9 Other transactions with the Bank’s principal owner are as follows: During the fiscal years ended March 31, 2023 and March 31, 2024, the Bank purchased loans from the principal owner aggregating Rs. 369,101.3 million and Rs. 116,320.0 million, respectively. Dividends paid to the principal owner during the fiscal years ended March 31, 2023 and March 31, 2024 were Rs. 13,401.5 million and nil, respectively. The Bank also enters into foreign exchange and derivative transactions with its principal owner. The notional principal amount and the mark-to-market gains in respect of foreign exchange and derivative contracts outstanding as of March 31, 2024 was nil (previous year Rs. 94,451.2 million) and nil (previous year Rs. 2,081.2 million), respectively. During the fiscal year ended March 31, 2024, the Bank issued Guarantees on behalf of its Principal owner and Others for nil (previous year Rs. 3.5 million) and for Rs. 2.5 million (previous year Rs. 5.1 million), respectively. For contributions made to provident funds and pension funds set up by the Bank, see note 2 4 Bank has issued a financial guarantee on behalf of HDFC ERGO, with a total amount guaranteed of Rs. 1 Rs.

Earnings per equity share

Earnings per equity share	12 Months Ended
	Mar. 31, 2024
Earnings per equity share	30 A reconciliation of the equity shares used in the computation of basic and diluted earnings per equity share has been provided below. Potential equity shares in the nature of ESOP with average outstanding balance of 19,064,987 ; As of March 31, 2022 2023 2024 Weighted average number of equity shares used in computing basic earnings per equity share 5,533,113,800 5,565,620,562 7,079,296,055 Effect of potential equity shares for stock options outstanding 30,366,023 21,552,766 28,156,373 Weighted average number of equity shares used in computing diluted earnings per equity share 5,563,479,823 5,587,173,328 7,107,452,428 The following are reconciliations Fiscal years ended March 31, 2022 2023 2024 2024 Basic earnings per share Rs.  69.76 Rs.  89.02 Rs.  88.66 US$  1.06 Effect of potential equity shares for stock options outstanding 0.38 0.34 0.35 0.01 Diluted earnings per share Rs.  69.38 Rs.  88.68 Rs.  88.31 US$  1.05 Basic earnings per ADS Rs.  209.28 Rs.  267.06 Rs.  265.98 US$  3.18 Effect of potential equity shares for stock options outstanding 1.14 1.02 1.05 0.03 Diluted earnings per ADS Rs.  208.14 Rs.  266.04 Rs.  264.93 US$  3.15 Dividends Any dividends declared by the Bank are based on the profit available for distribution as reported in the statutory financial statements of the Bank prepared in accordance with Indian GAAP. Additionally, the Banking Regulation Act and related regulations require the Bank to transfer 25% of its Indian GAAP profit after-tax to a non-distributable statutory reserve and to meet certain other conditions in order to pay dividends without prior RBI approval. As per the RBI guidelines, the dividend payout cannot exceed 35% of net income as calculated under Indian GAAP. Accordingly, the net income reported in these consolidated financial statements may not be fully distributable in that year. Dividends declared for the fiscal years ended March 31, 2022 and March 31, 2023 were Rs. 15.5 per equity share and Rs.19.0 per equity share, respectively.

Subsidiaries and Affiliates

Subsidiaries and Affiliates	12 Months Ended
	Mar. 31, 2024
Investments in and Advances to Affiliates [Abstract]
Subsidiaries and Affiliates	3 1 a. List of subsidiaries Name of Entity Background Holding % as at March 31, 2024 HDB Financial Services Limited (“HDBFSL”) A non-deposit taking non-banking finance company 95.2 HDFC Securities Limited Offers trading facilities in a range of equity, fixed income and derivative products to its clients 95.4 HDFC Life Insurance Company Limited (“HLIC”) Lender of long-term life insurance solutions provider in India, offering a range of individual and group insurance solutions 50.4 HDFC Asset Management Company Limited (“HAMC”) Investment manager to HDFC Mutual Fund 52.5 HDFC Sales Private Limited Strengthens the marketing and sales efforts by providing a dedicated sales force to sell home loans and other financial products, including public deposits 100.0 HDFC Capital Advisors Limited Acts as an Investment Manager for Category II Alternative Investment Funds registered with Securities and Exchange Board of India 89.0 HDFC Trustee Company Limited It provides Trusteeship services to HDFC Mutual Fund 100.0 Griha Investments Acts as investment manager to HIREF International LLC (the “Fund”) and its Special Purpose Vehicles 100.0 Griha Pte Limited Private Equity Fund Manager specializing in Real Estate Private Equity Investments in India. It is registered with the Monetary Authority of Singapore as a Fund Management Company 100.0 HDFC Education and (“HEADS”) The company is in the business of providing education management and consulting services. As directed by the RBI in connection with the Transaction, HEADS is expected to be fully divested no later than July 1, 2025 100.0 b. List of affiliates Name of Entity Background Holding % as at HDFC ERGO General Insurance Company Limited (“ERGO”) ERGO offers a complete range of general insurance products. 50.5

Fair value measurement

Fair value measurement	12 Months Ended
	Mar. 31, 2024
Fair value measurement	3 2 FASB ASC 820 Fair Value Measurement defines fair value, establishes a framework for measuring fair value in US GAAP, and expands disclosures about fair value measurements. The valuation hierarchy is based upon the transparency of inputs to the valuation of an asset or liability as of the measurement date. The three levels are defined as follows: Level of input Level 1 Unadjusted quoted market prices in active markets that are accessible at the measurement date for identical unrestricted assets or liabilities. Level 2 Quoted prices for similar assets and liabilities in active markets, and inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the financial instrument. Level 3 Inputs that are both significant to the fair value measurement and unobservable (i.e., supported with little or no market activity). The following is a description of the valuation methodologies used for instruments measured at fair value, as well as the general classification of such instruments pursuant to the valuation hierarchy. These valuation methodologies were applied to all of the Bank’s financial assets and financial liabilities carried at fair value. For Level 1 instruments, the valuation is based upon the unadjusted quoted prices of identical instruments traded in active markets. For Level 2 instruments, where such quoted market prices are not available, the valuation is based upon the quoted prices for similar instruments in active markets, the quoted prices for identical or similar instruments in markets that are not active, prices quoted by market participants and prices derived from standard valuation methodologies or internally developed models that primarily use certain inputs such as interest rates, yield curves, volatilities and credit spreads, which are available from public sources such as Reuters, Bloomberg and the Fixed Income Money Markets and Derivatives Association of India. The valuation methodology primarily includes discounted cash flow techniques. Valuation adjustments may be made to ensure that financial instruments are recorded at fair value. These adjustments may include amounts to reflect counterparty credit quality and the Bank’s creditworthiness, among other things, as well as unobservable parameters. Any such valuation adjustments are applied consistently over time. The valuation of Level 3 instruments is based on valuation techniques or models which use significant market unobservable inputs or assumptions. The Bank uses its quantitative pricing models to determine the fair value of its derivative instruments. These models use multiple market inputs, including interest rates, prices and indices to generate continuous yield or pricing curves and volatility factors to value the positions that are observable directly or indirectly. Valuation adjustments may be made to ensure that financial instruments are recorded at fair value. These adjustments may include amounts to reflect counterparty credit quality and the Bank’s creditworthiness, among other things, as well as unobservable parameters. Any such valuation adjustments are applied consistently over time. Financial assets and financial liabilities measured at fair value on a recurring basis: AFS debt securities: AFS debt securities are carried at fair value. Such fair values were based on quoted market prices, where available. If quoted market prices did not exist, fair values were estimated using the market yield on the balance period to maturity on similar instruments and similar credit risks. The fair value of asset-backed and mortgage-backed securities is estimated based on revised estimated cash flows at each balance sheet date, discounted at current market pricing for transactions with similar risk. A reduction in the estimated cash flows of these instruments will adversely impact the value of these securities. A change in the timing of these estimated cash flows will also impact the value of these securities. Trading securities: Trading securities are carried at fair value based on quoted market prices or market observable inputs. Equity securities: Marketable securities are measured at fair value. Non-marketable equity securities under the measurement alternative are carried at cost plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer. Held to maturity securities: There were no HTM securities as of March 31, 2023 and March 31, 2024. Separate Account Assets: Separate account assets are carried at fair value based on quoted market prices or market observable inputs. Separate account liabilities: The portion of separate account assets representing contract holder’s funds shall be reported in the insurance entity’s financial statements as a summary total, with an equivalent summary total reported for related liabilities. Liabilities on policies in force: Liabilities on policies in force is calculated as the present value of expected benefits to be paid, less the present value of expected premiums. These liabilities are determined based on GAAP and actuarial standards, using assumptions such as mortality, policy lapse, investment returns, and expenses. Assumptions are set at policy issuance to estimate experience over the benefit period. Some assumptions such as mortality, morbidity and interest rates locked in for long-duration contracts and reassessed at every reporting period. The following table summarizes investments measured at fair value on a recurring basis Fair Value Measurements Using Particulars Total Quoted prices in Significant other Significant (In millions) Trading account securities Rs.  135,831.1 Rs.  184.1 Rs.  135,647.0 Rs.  —  Securities available-for-sale 4,878,844.0 507,504.1 4,222,904.3 148,435.6 Equity securities ( ) 19,462.6 3,313.7 16,148.9 —  Total Rs.  5,034,137.7 Rs.  511,001.9 Rs.  4,374,700.2 Rs.  148,435.6 (*) Equity securities classified within other assets. The following table summarizes financial assets and financial liabilities measured at fair value on a recurring basis as of March 31, 2024, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value: Fair Value Measurements Using Particulars Total Quoted prices in Significant other Significant (In millions) Assets Trading account securities Rs.  461,245.3 Rs.  290,951.1 Rs.  148,296.2 Rs.  21,998.0 Securities available-for-sale 8,295,487.1 548,944.7 7,608,007.7 138,534.7 Equity securities ( ) 71,449.1 24,545.8 46,571.0 332.3 Separate Account Assets 955,416.3 808,309.4 147,106.9 —  Total Rs.  9,783,597.8 Rs.  1,672,751.0 Rs.  7,949,981.8 Rs.  160,865.0 Total US$ 117,393.8 US$ 20,071.4 US$ 95,392.2 US$ 1,930.2 Liabilities Liabilities on policies in force 237.2 —  237.2 —  Total Rs.  237.2 Rs.  —  Rs.  237.2 Rs.  —  Total US$ 2.8 US$ — US$ 2.8 US$ — (*) Equity securities classified within other assets. The following table summarizes certain additional information about changes in the fair value Particulars As of March 31, 2023 (In millions) Beginning balance at April 1, 2022 Rs.  143,894.7 Total gains or losses (realized/ unrealized) — Included in net income —  — Included in other comprehensive income (2,776.3 ) Purchases/additions 110,969.4 Sales —  Issuances —  Settlements (103,652.2 ) Transfers into Level 3 —  Transfers out of Level 3 —  Foreign currency translation adjustment —  Ending balance at March 31, 2023 Rs.  148,435.6 Total amount of gains/ (losses) included in net income attributable to change in unrealized gains/ (losses) relating to assets still held at reporting date Rs  —  Change in unrealized gains/ losses for the period included in other comprehensive income for assets held at the end of the reporting period Rs  (1,867.6 ) Particulars As of March 31, 2024 (In millions) Beginning balance at April 1, 2023 Rs.  148,435.6 Total gains or losses (realized/unrealized) — Included in net income 614.5 — Included in other comprehensive income 1,531.8 Purchases/additions 113,003.2 Sales (619.8 ) Issuances — Settlements (101,447.7 ) Transfers into Level 3 — Transfers out of Level 3 (652.6 ) Foreign currency translation adjustment — Ending balance at March 31, 2024 Rs.  160,865.0 Total amount of gains/ (losses) included in net income attributable to change in unrealized gains/ (losses) relating to assets still held at reporting date Rs  650.2 Change in unrealized gains/ (losses) for the period included in other comprehensive income for assets held at the end of the reporting period Rs  1,196.9 The transfers out of Level 3 occurred due to listing of previously unlisted equity shares, during the fiscal year ended March 31, 2024. This reclassification reflects the transition from using unobservable inputs to determine fair value to utilizing quoted prices in an active market. Derivatives: The Bank enters into forward exchange contracts, currency options, forward rate agreements, currency swaps and rupee interest rate swaps with inter-bank participants on its own account and for customers. These transactions enable customers to transfer, modify or reduce their foreign exchange and interest rate risks. Forward exchange contracts are commitments to buy or sell foreign currency at a future date at the contracted rate. Currency swaps are commitments to exchange cash flows by way of interest in one currency against another currency and exchange of principal amount at maturity based on predetermined rates. Rupee interest rate swaps are commitments to exchange fixed and floating rate cash flows in rupees. The Bank uses its pricing models to determine the fair value of its derivative instruments. These models use market inputs that are observable directly or indirectly. The following table summarizes derivative instruments measured at fair value on a recurring basis as of March 31, 2023, segregated by the level of valuation inputs within the fair value hierarchy Fair Value Measurements Using Particulars Total Quoted prices in Significant other Significant (In millions) Derivative assets Rs.  121,749.4 Rs.  —  Rs.  121,749.4 Rs.  —  Derivative liabilities Rs.  98,783.5 Rs.  —  Rs.  98,783.5 Rs.  —  The following table summarizes derivative instruments measured at fair value on a recurring basis as of March 31, 2024, segregated by the level of valuation inputs within the fair value hierarchy: Fair Value Measurements Using Particulars Total Quoted prices in Significant other Significant (In millions) Derivative assets Rs.  109,038.5 Rs.  —  Rs.  109,038.5 Rs.  —  Derivative liabilities Rs.  109,409.9 Rs.  —  Rs.  109,409.9 Rs.  —

Risk and uncertainties

Risk and uncertainties	12 Months Ended
	Mar. 31, 2024
Risks and Uncertainties [Abstract]
Risk and uncertainties	3 3 The Bank continues to monitor the developments in the ongoing war between Russia and Ukraine and the recent the geo-political conflict between Israel and Hamas which complicates the geopolitical landscape. Following the Houthis group’s attack on international ships in the Red Sea, the United States and the United Kingdom launched a joint strike in Yemen. In April 2024, Iran was said to have launched a drone attack on Israel after the latter attacked Iran’s foreign consulate in Syria. While the conflict was contained at initial stages, a risk of further escalation still looms. The Bank seeks to manage the associated impacts on its customers and business.

Subsequent events

Subsequent events	12 Months Ended
	Mar. 31, 2024
Subsequent Events [Abstract]
Subsequent events	3 4 In its meeting held on April 20, 2024, the Board of Directors of the Bank recommended a dividend of Rs. per share for the fiscal year ended March 31, 2024 subject to approval of the shareholders at the next Annual General Meeting to be held. The amount of such dividend aggregated to Rs. million as of March 31, 2024.

Summary of significant accoun_2

Summary of significant accounting policies (Policies)	12 Months Ended
	Mar. 31, 2024
Principles of consolidation	a. Principles of consolidation The consolidated financial statements include the accounts of HDFC BANK LIMITED AND SUBSIDIARIES. The Bank consolidates subsidiaries in which, directly or indirectly, it holds more than 50% of the voting rights and/or has control. Entities where the Bank holds 20% to 50% of the voting rights and/or has the ability to exercise significant influence are accounted for under the equity method. These investments are included in other assets and the Bank’s proportionate share of income or loss is included in non-interest revenue, other. The Bank consolidates Variable Interest Entities (“VIEs”) where the Bank is determined to be the primary beneficiary (see note 2k). All significant inter-company balances and transactions are eliminated on consolidation.
Basis of presentation	b. Basis of presentation These consolidated financial statements have been prepared in accordance with the Generally Accepted Accounting Principles in the United States of America (“U.S. GAAP”). U.S. GAAP differs in certain material respects from Generally Accepted Accounting Principles in India, the requirements of India’s Banking Regulation Act 1949 and related regulations issued by the Reserve Bank of India (“RBI”), the guidelines issued by the Securities and Exchange Board of India (“SEBI”), and the guidelines issued by the Insurance Regulatory and Development Authority of India (“IRDAI”) (collectively “Indian GAAP”), which form the basis of the statutory general purpose consolidated financial statements of the Bank in India. Principal differences include the determination of the allowance for credit losses, classification and valuation of investments, classification and valuation of insurance contracts, accounting for deferred taxes, stock-based compensation, loan origination fees, derivative financial instruments, business combination, lease accounting and the presentation format and disclosures of the consolidated financial statements and related
Use of estimates	c. Use of estimates The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and
Cash and due from banks, and restricted cash	d. Cash and due from banks, and restricted cash Cash and due from banks comprise of cash and deposit with banks that have original maturities of 90 days or less. The Bank has captioned cash and cash equivalent as “cash and due from banks, and restricted cash” on the consolidated balance sheets. Cash and due from banks include restricted cash (see note 4).
Customer acquisition costs	e. Customer acquisition costs Customer acquisition costs principally consist of commissions paid to third-party referral agents who source retail loans and such costs are deferred and amortized as a yield adjustment over the life of the loans. Advertising
Investments in securities	f. Investments in securities Investments consist of securities purchased as part of the Bank’s treasury operations, such as government securities and other debt securities, and investments purchased as part of the Bank’s wholesale banking operations, such as credit substitute securities issued by the Bank’s wholesale banking customers. Credit substitute securities typically consist of commercial paper and debentures issued by the same customers with whom the Bank has a lending relationship in its wholesale banking business. Investment decisions for credit substitute securities are subject to the same credit approval processes as for loans, and the Bank bears the same customer credit risk as it does for loans extended to those customers. Additionally, the yield and maturity terms are generally directly negotiated by the Bank with the issuer. As the Bank’s exposures to such securities are similar to its exposures on its loan portfolio, additional disclosures have been provided on impairment status in note 8 and on concentrations of credit risk in note 11. All other securities, including mortgage-and asset-backed securities, are actively managed as part of the Bank’s treasury operations. The issuers of such securities are either government, public financial institutions or private issuers. These investments are typically purchased from the market, and debt securities are generally publicly-rated. Securities that are held principally for resale in the near term are classified as held for trading (“HFT”) and are carried at fair value, with changes in fair value recorded in net income. Debt securities that management has the positive intent and ability to hold to maturity are classified as held to maturity (“HTM”) and are carried at amortized cost. All debt securities that are not classified as HTM or HFT are classified as available for sale (“AFS”) debt securities and are carried at fair value. Unrealized gains and losses on such securities, net of applicable taxes, are reported in accumulated other comprehensive income/(loss), a separate component of shareholders’ equity. Equity securities are classified under other assets. Marketable securities are measured at fair value and any change in fair Fair values are based on market quotations, where a market quotation is available or otherwise based on present values at current interest rates for such investments. Transfers between categories are recorded at fair value on the date of the transfer. For equity investments (“investee”) where control over an investee is typically determined by majority ownership; however, circumstances may arise where a majority-owned investment is not controlled. In such cases, equity method accounting is applied, particularly when the other shareholder(s) of the investee holds substantive participative rights granted by law or contract. The Bank’s consolidated net income incorporates its proportionate share of the net income or loss from equity method investees.
Impairment of debt securities	g. Impairment of debt securities The Bank conducts a review of all AFS debt securities with fair value below their carrying value or with zero loss expectation. The Bank evaluates whether the decline in fair value has resulted from credit losses or other factors. In making this assessment, management considers the extent to which fair value is less than amortized cost, any changes to the rating of the security by a rating agency, and adverse conditions specifically related to the security, among other factors. If the assessment indicates that a credit loss exists, the present value of cash flows to be collected from the security are compared to the amortized cost basis of the security. If the present value of cash flows expected to be collected is less than the amortized cost basis, a credit loss exists and an allowance for credit losses is recorded through a provision for credit loss expense, limited by the amount that fair value is less than the amortized cost basis. Any impairment that has not been recorded through an allowance for credit losses is recognized in other comprehensive income. The allowance is increased or decreased if credit conditions subsequently worsen or improve. A reversal of credit losses is recognized in net income. The Bank recognizes the entire difference between amortized cost basis and fair value in net income for impaired AFS debt securities that the Bank has an intent to sell or for which the Bank believes it will more-likely-than-not be required to sell prior to recovery of the amortized cost basis. The Bank does not record an allowance on accrued interest receivables on the balance sheet due to its policy to reverse interest income on debt securities in a timely manner in line with the Bank’s non-accrual and past due policies and on any debt security classified as non-performing. The Bank does not purchase debt securities with credit deterioration.
Loans	h. Loans The Bank grants retail and wholesale loans to customers. Loans that management has the intent and ability to hold for the foreseeable future or until maturity or payoff are reported at their outstanding unpaid principal balances adjusted for an allowance for credit losses. Loan origination fees and certain direct origination costs are deferred and recognized as adjustments to net income over the lives of the related loans. Interest is accrued on the unpaid principal balance and is included in interest income. Loans are generally placed on “non-accrual” status when interest or principal payments are ninety days past due or if they are considered non-performing, at which time no further interest is accrued and any unrealized interest recognized in the consolidated statement of income is reversed. Interest income and principal payments on loans placed on non-accrual status are recognized when received. Loans are returned to accrual status when all principal and interest amounts contractually due are brought current and future payments are reasonably assured.
Allowance for credit losses	i. Allowance for credit losses The Bank provides an allowance for credit losses based on management’s which The Bank’s allowance for credit losses comprises of: • the allowance for credit losses, which covers the Bank’s loan portfolios and is presented separately on the balance sheet in Loans, • the allowance for lending-related commitments, which is recognized on the balance sheet in Accrued expenses and other liabilities, • the allowance for credit losses on investment securities, which covers the Bank’s AFS debt securities and is recognized on the balance sheet in Investments AFS debt securities; and • the allowance for credit losses on other financial assets measured at amortized cost, and other off-balance sheet credit exposures, which is recognized on the balance sheet in Accrued expenses and other liabilities. All changes in the allowance for credit losses are recognized in the consolidated statement of income. The Bank’s policies used to determine its allowance for credit losses and its allowance for lending-related commitments are described below: The Bank’s loan portfolio is bifurcated into Retail and Wholesale portfolios, wherein the Retail portfolio is segmented into homogenous pools using various factors such as nature of product, delinquencies, and other demographic and behavioral variables of the borrowers. The wholesale portfolio is segmented into various risk grades on the basis of a host of quantitative and qualitative factors including financial performance, industry risk, business risk and management quality. The allowance for loan-related losses and allowance for lending-related commitments represents expected credit losses over the remaining expected life of outstanding loans and lending-related commitments that are not unconditionally cancellable. The Bank does not record an allowance for future draws on unconditionally cancellable lending-related commitments (e.g., credit cards). The Bank does not record an allowance on accrued interest receivables on the balance sheet due to its policy to reverse interest income on loans more than 90 days past due and in the case of agricultural loans more than 365 days past due, and also on any loans classified as non-performing. The expected life for retail loans and wholesale loans is determined based on their contractual terms and expected prepayments as applicable. The expected life of funded credit card loans is generally estimated by considering expected future payments on the credit card account. The Bank has an Unconditionally Cancellable Clause (“UCC”) for credit card lines and in accordance with the current expected credit loss (CECL) accounting guidance, the Bank makes an allowance only for debt drawn at the time of expected loss measurement. The Bank applies expected principal payments to the credit card receivable balances existing at the reporting date until the balance is exhausted. The estimate of expected credit losses includes expected recoveries of amounts previously charged off or expected to be charged off, even if such recoveries result in a negative allowance. The Retail loans are charged off against allowances typically when the account becomes 150 to 1,095 days past due depending on the type of loan. The defined delinquency levels at which major loan types are charged off are 150 days past due for personal loans and credit card receivables, 180 days for auto loans, commercial vehicle and construction equipment finance, 1,095 days past due for housing loans and on a customer by customer basis in respect of retail business banking when management believes that any future cash flows from these loans are remote including realization of collateral, if applicable, and where any restructuring or any other settlement arrangements were not feasible. The Wholesale loans are charged off against the allowance when management believes that the loan balance may not be recovered, including realization of collateral, if applicable, and where any restructuring or any other settlement arrangements were not feasible. Subsequent recoveries, if any, against write-off cases, are adjusted to provision for credit losses in the consolidated statement of income. Wholesale loans are considered non-performing when, based on current information and events, it is probable that the Bank will be unable to collect scheduled payments of principal or interest when due according to the contractual terms of the loan agreement. Factors considered by management in determining non-performance include payment status, the financial condition of the borrower, the value of collateral held, and the probability of collecting scheduled principal and interest payments when due. Wholesale loans that experienced insignificant payment delays and payment shortfalls are generally not classified as non-performing but are placed on a surveillance watch list and closely monitored for deterioration. Management determines the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including the length of the delay, the reasons for the delay, the borrower’s prior payment record, market information, and the amount of the shortfall in relation to the principal and interest owed. These factors are considered by the Bank for selection of loans for credit reviews and assessment of allowance. In order to estimate the allowance, the Bank primarily relies on its risk-segmentation models, which are also an integral part of the Bank’s risk management framework. Risk segmentation aims to group homogenous exposures together to allow for collective assessment of expected losses. Expected Loss estimation under collective assessment, is primarily based on Probability of Default (“PD”), Loss given Default (“LGD”) and Exposure at Default (“EAD”) estimates. The Bank has modeled its PD estimates at the aforementioned granularity for its retail and wholesale portfolios and has also created the remaining expected life structure of the same for computation of credit losses. The Bank’s off-balance sheet credit exposures include unfunded loan commitments, financial guarantees, including standby letters of credit, and other similar instruments. For off-balance sheet credit exposures, the Bank recognizes an allowance for credit loss (“ACL”) associated with the unfunded amounts. The Bank does not recognize an ACL for commitments that are unconditionally cancellable at the Bank’s discretion. ACL for off-balance sheet credit exposures are reported as a liability in accrued expenses and other liabilities on the consolidated balance sheet. ACL in such cases is measured for the remaining contractual term, adjusted for prepayments, of the financial asset (including off-balance sheet credit exposures) using historical experience, current conditions, and reasonable and supportable forecasts. Collective and individual assessments Management estimates the allowance balance using relevant available information, from internal and external sources, relating to historical experience, current conditions, and reasonable and supportable forecasts. Historical loan default and loss experience provides the basis for the estimation of expected credit losses. Adjustments to historical loss information incorporate management’s view of current conditions and forecasts. The methodology for estimating the amount of credit losses reported in the allowance for credit losses has two basic components: first, a pooled component for expected credit losses for pools of loans that share similar risk characteristics and second an asset-specific component involving loans that do not share risk characteristics and the measurement of expected credit losses for such individual loans. As an integral part of the credit process, the Bank has a rating model appropriate to its retail and wholesale credit segments. The Bank monitors credit quality within its segments based on primary credit quality indicators. This internal rating (model scale) is updated at least annually. The majority of the Bank’s credit exposures share risk characteristics with other similar exposures, and as a result are collectively assessed for allowance (“portfolio-based component”) by grouping them into homogeneous pools of loans. If an exposure does not share risk characteristics with other exposures, the Bank generally estimates expected credit losses on an individual basis, considering expected repayment and conditions impacting that individual exposure (“asset-specific component”). The asset-specific component covers loans modified or reasonably expected to be modified in a troubled debt restructuring (“TDR”), collateral-dependent loans, and borrowers with financial difficulties. Portfolio-based component (Pooled Loans) The portfolio-based component begins with a quantitative calculation that considers the likelihood of the Apart from its historical experience, the Bank seeks to incorporate any reasonable and supportable information regarding the prevalent and future economic and operating conditions, and their impact on credit losses for the Bank into its allowance. The Bank therefore includes in its estimation the use of quantitative statistical models to predict the impact of macro-economic variables, on defaults. The Bank uses The Bank estimates its allowance for credit losses for pooled loans based on its PD and LGD, determined for the respective risk pools. The Bank estimated the collective ACL using a current expected credit losses methodology which is based on relevant information about historical experience, current conditions, and reasonable and supportable forecasts. The allowance for credit losses for the quantitative component of pooled loans is the product of multiplying the PD, LGD and EAD. Asset-specific component To determine the asset-specific component of the allowance, collateral-dependent loans (including those loans for which foreclosure is probable) and larger and non-accrual risk-rated loans in the wholesale portfolio segment are generally evaluated individually, while smaller loans (both scored and risk-rated) are aggregated for evaluation based on factors relevant for the respective class of assets. Loans are identified for individual assessment based on financial difficulty which includes nonperforming loans, labeled loans and loans identified based on management judgment. The Bank generally measures the asset-specific allowance as the difference between the amortized cost of the loan and the present value of the cash flows expected to be collected, discounted at the loan’s original effective interest rate. Subsequent changes in impairment, including those related to the passage of time, are generally recognized as an adjustment to the allowance for credit losses. For collateral-dependent loans, the fair value of collateral less estimated costs to sell is used to determine the charge-off amount for declines in value (to reduce the amortized cost of the loan to the fair value of collateral) or the amount of the negative allowance that should be recognized (for recoveries of prior charge-offs associated with improvements in the fair value of collateral). The asset-specific component of the allowance for credit losses that have been or are expected to be modified in TDRs incorporates the effect of the modification on the loan’s expected cash flows (including forgone interest, principal forgiveness, and other concessions), and also the potential for redefault. For wholesale loans modified or expected to be modified in TDRs, expected losses incorporate management’s expectation of the borrower’s ability to repay under the modified terms. Estimating the timing and amounts of future cash flows is highly subject to judgment as these cash flow projections rely upon estimates such as loss severities, asset valuations, default rates (including redefault rates on modified loans), the amounts and timing of interest or principal payments (including any expected prepayments) or other factors that are reflective of current and expected market conditions. All of these estimates and assumptions require significant management judgment and certain assumptions are highly subjective.
Insurance Services	j. Insurance Services i. Undistributed policyholders earnings account This separate line item • Actuarial remeasurement of insurance liabilities; • Effective interest method on Investments; • Fair value of investments available for sale debt securities and Investments held for trading; • Fair valuation of employees stock option scheme; • Adjustment on account of leases; • Actuarial remeasurement of employee benefits; and • Reversal of hedge reserve from previous framework ii. Liabilities on policies in force The Bank establishes liabilities for future policy benefit liabilities (“LFPBs”) for amounts payable under traditional non-participating and limited-payment long-duration insurance contracts. Generally, amounts are payable over an extended period of time and the related liabilities are calculated as the present value of future expected benefits and claim settlement expenses to be paid, reduced by the present value of future expected net premiums. Contracts are grouped as cohorts when measuring LFPBs. The corresponding liabilities are established based on methods and underlying assumptions in accordance with US GAAP and applicable actuarial standards. A net premium ratio (“NPR”) approach is utilized, where net premiums (i.e., the portion of gross premiums required to fund expected insurance benefits and claim settlement expenses) are accrued each period as LFPBs. Cash flow assumptions are incorporated into the calculation of a cohort’s NPR and LFPB reserve. The Bank’s best estimate assumptions include mortality, persistency, morbidity, and expenses. All assumptions would be updated at each year end except for current discount rates, which will be updated at each valuation date. The impact of all assumption changes at locked in discount rates would flow through Statement of Income and the impact of discount rate update will be recognized in Other Comprehensive Income. For limited-payment long-duration contracts, the collection of premiums does not represent the completion of the earnings process. Therefore, any gross premium received in excess of net premiums is deferred and amortized as a deferred profit liability (“DPL”). The amortization basis is set to be the sum assured in-force for traditional policies and benefit outgo for annuities for each cohort, to ensure that profits are recognized over the life of the underlying policies in that cohort, regardless of when premiums are received. This amortization of the DPL is recorded through net income within “Claims and benefits paid pertaining to insurance business”. Consistent with the Bank’s measurement of traditional long-duration products, management also recognizes a LFPB reserve for limited-payment contracts that is representative of the difference between the present value of expected future benefits and the present value of expected future net premiums, subject to retrospective remeasurement through net income and OCI, as described above. The Bank establishes LFPBs for traditional participating contracts, using a net premium approach, similar to traditional non-participating contracts. For determining present value of benefits, the future reversionary bonus has not been considered. The bonuses will get factored in as and when they are declared. The discount rate and actuarial assumptions are locked-in at inception, and any the impact of discount rate update will be recognized in Other Comprehensive Income. Deposits related to universal life-type and investment products are credited to policyholder account balances. Policyholder Account Balances liability represents the contract value that has accrued to the benefit of the policyholder as of the balance sheet date. This liability is primarily associated with accumulated account deposits, plus interest credited, less policyholder withdrawals and other charges assessed against the account balance, as applicable. Unearned revenue reserve primarily relates to the universal Life-type products and represents policy charges for services to be provided in future periods. The charges are deferred as unearned revenue are generally amortized over the expected life of the contract similar to DAC. iii. Separate Account Assets and Liabilities Separate account assets represents segregated funds that iv. Deferred Acquisition Costs (“DAC”) Acquisition costs directly related to successful contract acquisitions of products have been deferred to the extent recoverable. Such acquisition costs are capitalized in the period they are incurred, and primarily include initial commission, employees remuneration and welfare benefits, medical fees, stamp duty and goods and services tax. All other acquisition-related costs including those related to general advertising and solicitation, market research, agent training, product development, unsuccessful sales, and underwriting efforts as well as all indirect costs are expensed as incurred. DAC is amortized on a constant level basis that approximates straight line amortization using the following amortization basis: • Traditional life insurance contracts and traditional life insurance limited payment contracts – Sum assured in force. • Annuity products – Number of policies in force. • Universal life type contracts – Number of policies in force. Amortization of DAC is included in “Administrative and other expense”. v. Reinsurance For prospective reinsurance of short duration contracts that meet the criteria for reinsurance accounting, amounts paid (received) are recorded as ceded premium and ceded unearned premiums. Such amounts are amortized through earned premiums over the remaining contract period in proportion to the amount of insurance protection provided. The reinsurance recoverable for long-duration contracts and associated contract features is measured using assumptions and methods generally consistent with the underlying direct policies. Amounts currently recoverable under reinsurance agreements are included in “Other assets”. The assessment of recoverability of reinsurance recoverable balances in each reporting period, is carried out through either historical trend of disputes and credit events or financial analysis of the credit quality of the reinsurer. These adjustments are recorded to reflect the results of these assessments through an allowance for credit losses and disputes that reduces the carrying amount of reinsurance and other assets on the consolidated balance sheet. The estimate requires significant judgement for which key considerations include paid and unpaid recoverable, whether the balance is in dispute or subject to legal collection, the relative financial health of the reinsurer and whether collateral and collateral arrangement exist. An estimate of the reinsurance recoverable lifetime expected credit losses is established utilizing a probability of default and loss given default method, which reflects the insurer’s risk rating. The allowance for credit losses excludes disputed amounts. vi. Premium Deficiency Premium deficiency reserves may be established for short-duration contracts to provide for expected future losses and certain expenses that exceed unearned premiums. These reserves are based on actuarial estimates of the amount of loss inherent in that period, including losses incurred for which claims have not been reported. The provisions for IBNR (Incurred but Not Reported) claims are calculated using studies that measure the historical length of time between the incurred date of a claim and its eventual reporting to the Bank. If loss recognition exists, to write off DAC to the extent required for eliminating losses. If loss recognition still exists after DAC write-off, then a loss recognition liability would be established. For universal life-type contracts, a premium deficiency reserve may be established when existing contract liabilities, together with the present value of future fees and/or premiums, are not sufficient to cover the present value of future benefits and settlement costs. Loss recognition would be charged to net income by an increase in the liability for future benefits presented separately
Sales/transfer of receivables	k. Sales/transfer of receivables The Bank enters into assignment transactions, which are similar to asset-backed securitization transactions through the The Bank first makes a determination as to whether the securitization entity would be consolidated. Second, it determines whether the transfer of financial assets is considered a sale. Furthermore, former qualifying special purpose entities (QSPEs) are now considered VIEs and are no longer exempt from consolidation. The Bank consolidates VIEs when it has both: (1) power to direct activities of the VIE that most significantly impact the entity’s economic performance and (2) an obligation to absorb losses or right to receive benefits from the entity that could potentially be significant to the VIE. The scope conditions examined include whether the entities’ equity investment at risk is insufficient to finance the activities without subordinated financial support and whether the holders of equity lack the characteristics of a financial interest. A controlling financial interest includes characteristics such as ability to make decisions through voting or similar rights, unlimited obligation to absorb the entities expected losses, and unlimited rights to receive the entities expected residual returns. Gains or losses from the sale of receivables are recognized in the consolidated statement of income in the period the sale occurs based on the relative fair value of the portion sold and the portion allocated to retained interests, and are reported net of the estimated cost of servicing by the Bank. Fair values are determined based on the present value of expected future cash flows, using best estimates for key assumptions, such as prepayment and discount rates, commensurate with the risk involved.
Property and equipment	l. Property and equipment Property and equipment are stated at cost, less accumulated depreciation. Depreciation is provided over the estimated useful lives of property and equipment on a straight-line basis at the following rates: Type of Asset Rate of depreciation Premises 1.67% Software and systems 20.00% Equipment and furniture 10.00%-33.33% For assets purchased and sold during the year, depreciation is provided on a pro rata basis by the Bank and capital advances are included in other assets. Improvements to leasehold premises are charged off over the remaining primary
Lease accounting	m. Lease accounting The Bank recognizes its lease liabilities measured as the present value of lease payments not yet paid, discounted using the incremental borrowing rate. The right-of-use asset includes an initial measurement of the lease liabilities adjusted for accrued lease liabilities. At the inception of the contract, the Bank assesses whether the contract is, or contains, a lease. The Bank’s assessment is based on whether (1) the contract involves the use of distinct identified assets, (2) the Bank has the right to substantially all the economic benefit from the use of the asset throughout the term of the contract, and (3) the Bank has the right to direct the use of the asset. Leases are examined for classification as either finance leases or operating leases. A lease is classified as a finance lease if any one of the following criteria is met (1) the lease transfers ownership of the asset by the end of the lease term, (2) the lease contains an option to purchase the asset that is reasonably certain to be exercised, (3) the lease term is for the major part of the remaining useful life of the asset or (4) the present value of the lease payments equals or exceeds substantially all of the fair value of the asset. A lease is classified as an operating lease if it does not meet the above criteria. The Banks’s lessee arrangements consist of operating leases. The Bank records right-of-use assets and lease liabilities at the lease commencement date. Right-of-use assets are reported in other assets on the Consolidated Balance Sheets, and the related lease liabilities are reported in accrued expenses and other liabilities. The Bank has elected not to record right-of- use Lease expense is recognized on a straight-line basis over the lease term and is recorded in non-interest expense-premises and equipment in the consolidated statements of income. The Bank made an accounting policy decision not to separate lease and non-lease components of a contract that is or contains a lease. At the lease commencement, lease liabilities are recognized based on the present value of the remaining lease payments and discounted using the incremental borrowing rate as of the date of the lease commencement. Right-of-use assets initially equal the lease liabilities, adjusted for any lease payments made prior to lease commencement and for any lease incentives. The Bank assesses leased assets for impairment, and if the carrying amount of the leased asset exceeds the undiscounted cash flows from the lease payments and the estimated residual value upon disposition of the leased asset, an impairment loss is recognized. As lessor, the Bank recognizes its lease arrangements, where risks and rewards incidental to ownership of an asset substantially vest with the lessor as operating leases. Lease rental income under operating lease is recognized in profit/ loss over the lease term on a straight-line basis unless another systematic and rational basis is more representative of the pattern in which benefit is expected to be derived from the use of the underlying asset.
Impairment or disposal of tangible long-lived assets	n. Impairment or disposal of tangible long-lived assets Whenever events or circumstances indicate that the carrying amount of tangible long-lived assets may not be recoverable, the Bank subjects such long-lived assets to a test of recoverability based on the undiscounted cash flows from use or disposition of the asset. Such events or circumstances would include changes in the market, technology obsolescence, adverse changes in profitability or regulation. If the asset is impaired, the Bank recognizes an impairment loss estimated as the difference between the carrying value and the net realizable value.
Income tax	o. Income tax Income tax expense/benefit consists of the current tax expense and the net change in deferred tax assets or liabilities during the year. Deferred tax assets and liabilities are recognized for the future tax consequences of differences between the carrying values of assets and liabilities for financial reporting purposes and their respective tax bases, and for operating loss and tax credit carry forwards. Deferred tax assets are reduced by a valuation allowance to the amount that is more likely than not to be realized based on management’s judgment. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which the deferred tax assets or liabilities are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in the income statement in the period of enactment of the change. Income tax benefits are recognized and measured based upon a two-step model: 1) a tax position must be more-likely-than-not to be sustained based on its technical merits in order to be recognized, and 2) the benefit is measured as the largest amount of that position that is greater than 50 percent likely of being realized upon settlement. The difference between the benefit recognized for a position in accordance with this model and the tax benefit claimed on a tax return is referred to as an unrecognized tax benefit. The Bank’s policy is to include interest income, interest expense and penalties on overpayments and underpayment of income taxes within income tax expense in the consolidated statement of income. Interest income on overpayments of income taxes is recognized when the related matter is resolved. The Bank follows specific identification method for releasing income tax effects from AOCI.
Revenue recognition	p. Revenue recognition Interest income from loans and from investments is recognized on an accrual basis using the effective interest method when earned except in respect of loans or investments placed on non-accrual status, where it is recognized when received. Fees and commissions from guarantees issued are amortized over the contractual period of the commitment. Commission, Fees per Dividends from investments are recognized when declared. Realized gains and losses on sale of securities are recorded on the trade date and are determined using the weighted average cost method. Premiums related to traditional long-duration products are recognized as revenues when due from policyholders. Premiums related to short-duration products are recognized on a pro-rata basis over the applicable contract term. When premiums are due over a significantly shorter period than the period over which benefits are provided, any excess profit is deferred as a DPL. The DPL is also recognized on the premiums received on the business acquired as on the PGAAP date. The DPL is amortized or recognized as earnings based on the amortization basis as mentioned in deferred acquisition cost. Premiums related to short-duration products are recognized on a pro rata basis over the applicable contract term. Unearned premiums, representing the portion of premium written related to the unexpired coverage, are reflected as liabilities until earned. Deposits related to universal life and investment-type products are credited to “Premium and other operating income from insurance business”. Revenues from such contracts consist of fees for mortality, policy administration, fund management charges, surrender charges and other charges as applicable are recorded in universal life and investment-type line of business in the period in which services are provided. All revenues and expenses are presented net of reinsurance, as applicable. Other fees and income are recognized when earned, which is when the service that results in the income has been provided. The Bank amortizes annual fees on credit cards over the contractual period of the fees.
Foreign currency transactions	q. Foreign currency transactions The Bank’s functional currency is the Indian Rupee, except for the Bank’s foreign branches. Foreign currency transactions are recorded at the exchange rate prevailing on the date of the transaction. Foreign currency denominated monetary assets and liabilities are converted into respective functional currency using exchange rates prevailing on the balance sheet dates. Gains and losses arising on conversion of foreign currency denominated monetary assets and liabilities and on foreign currency transactions are included in the determination of net income under foreign exchange transactions. For the foreign branches, the assets, liabilities and operations are translated, for consolidation purposes, from functional currency of the foreign branch to the Indian Rupee reporting currency at period-end rates for assets and liabilities and at average rates for operations. The resulting unrealized gains or losses are reported as a component of AOCI.
Stock-based compensation	r. Stock-based compensation The Bank measures the cost of equity-settled transactions at fair value on the grant date. The fair value is determined by using either the Binomial or Black-Scholes option pricing model taking into account the terms and conditions upon which the equity-settled transactions were granted. The costs of equity-settled transactions are recognized as an expense with a corresponding increase in equity over the vesting period. For further information, see note 23.
Debt issuance costs	s. Debt issuance costs Issuance costs of long-term debt are amortized over the tenure of the debt.
Earnings per share	t. Earnings per share Basic earnings per equity share have been computed by dividing net income by the weighted average number of equity shares outstanding for the period. Diluted earnings per equity share has been computed using the weighted average number of equity shares and dilutive potential equity shares outstanding during the period, using the treasury stock method, except where the result would be anti-dilutive. The Bank also reports basic and diluted earnings per ADS, where each ADS represents three equity shares. Earnings per ADS have been computed as earnings per equity share multiplied by the number of equity shares per ADS. A reconciliation of the number of shares used in computing earnings per share has been provided in note 30.
Segment information	u. Segment information The Bank operates in five reportable segments, namely retail banking, wholesale banking, treasury services and 7
Derivative financial instruments	v. Derivative financial instruments The Bank recognizes all derivative instruments, including certain derivative instruments embedded in other contracts, as assets or liabilities in the balance sheet and measures them at fair value. The Bank has not designated any derivatives as hedges. As such, all changes in fair value of derivative instruments are recognized in net income under derivative gain/(loss) in the period of change. The Bank enters into forward exchange contracts, currency swaps and currency options with its customers and typically transfers such customer exposures in the inter-bank foreign exchange markets. The Bank also enters into such instruments to cover its own foreign exchange exposures. All such instruments are carried at fair value, determined based on market quotations or market-based inputs. The Bank enters into interest rate swaps for its own account. The Bank also enters into interest rate currency swaps and cross currency interest rate swaps with its customers and typically offsets these risks in the inter-bank market. Such contracts are carried on the balance sheet at fair value, or priced using market determined yield curves.
Business combination	w. Business combination The Bank accounts for acquired businesses using the acquisition method of
Goodwill	x. Goodwill Under applicable accounting guidance, goodwill is reviewed at the reporting unit level for potential impairment at least on an annual basis at the end of the reporting period, or more frequently if events or circumstances indicate a potential impairment. The Bank tests goodwill of each separate reporting unit by initially qualitatively assessing whether events and circumstances indicate that it is more likely than not that a reporting unit’s fair value is less than its carrying amount. If such assessment indicates fair value is not less than the carrying value, the reporting unit is deemed not to be impaired and no further analysis is required. If it is more likely than not that fair value of the reporting unit is below its carrying value, a quantitative test is then performed. An impairment loss recognized cannot exceed the amount of goodwill assigned to a reporting unit, and the loss establishes a new basis for the goodwill. Subsequent reversal of goodwill impairment losses is not permitted.
Intangible Assets	y. Intangible Assets The Bank’s identifiable intangible assets consists of, Brand, Investment Management Contract, Value of Business Acquired (“VOBA”), Distribution Network, Customer Relationship and Transferable Development Rights acquired in Business Combination. All intangible assets except Brand and Investment Management Contract are definite-lived intangible assets and are recorded at acquisition date fair value. The Bank’s definite-lived intangible assets are amortized over their estimated useful lives. Indefinite-lived intangible assets are not amortized but are tested for impairment annually, or more frequently, if necessary. Intangible Assets Useful lives (years) Amortization method Brand Indefinite Not applicable Investment Management Contract Indefinite Not applicable Value of Business Acquired (VOBA) Life of the underlying contracts Constant level basis(*) Distribution Network 17 Straight line Customer Relationship 17 Straight line Transferable Development Rights 8 Straight line ( ) VOBA is amortized on a constant-level basis that approximates straight-line amortization (Refer note 20) The Bank reviews intangible assets for impairment whenever events or changes in circumstances indicate that their carrying amounts may not be recoverable. Impairment is indicated if the sum of undiscounted estimated future net cash flows is less than the carrying value of the asset.
Recently adopted accounting standards	z. Recently adopted accounting standards As a result of the merger of HDFC Limited with HDFC Bank Limited, HDFC Life Insurance Company Limited became a subsidiary of HDFC Bank. As per Accounting Standards Update (ASU) 2018-12 – Financial Services – Insurance (Topic 944): Targeted Improvements to the Accounting for Long-Duration Contracts is applicable to HDFC Life Insurance Company Limited. In August 2018, the FASB issued Accounting Standards Update (ASU) No. 2018-12, Financial Services—Insurance (Topic 944): Targeted Improvements to the Accounting for Long-Duration Contracts. The FASB subsequently issued several ASUs as amendments to ASU No. 2018-12. The standard requires insurance companies with long duration contracts to: (1) review and, if there is a change, update the assumptions used to measure expected cash flows at least annually; (2) update the discount rate assumption at each reporting date; and (3) enhance certain qualitative and quantitative disclosures. ASU No. 2018-12 was applied using a modified retrospective approach that requires restatement of prior periods presented, including a cumulative adjustment to accumulated other comprehensive income as of January 1, 2021 (the transition date). The Bank acquired from eHDFC group an insurance business which has been included in the Bank’s financial results from July 01, 2023. The standard has, among other things, impacted the discount rate used in estimating reserves for the Bank’s life and annuity reinsurance portfolio, which is in runoff. In March 2022, the FASB issued ASU No. 2022-01 “Fair Value Hedging—Portfolio Layer Method (Topic 815)”. This ASU expands the portfolio layer method of hedge accounting prescribed in ASU 2017-12 to allow multiple hedged layers of a single closed portfolio and to include portfolios of both prepayable and non-prepayable financial assets. This scope expansion is consistent with the FASB’s efforts to simplify hedge accounting and allows entities to apply the same accounting method to similar hedging strategies. This ASU also specifies eligible hedging instruments in a single-layer hedge, provides additional guidance on accounting and disclosure of hedge basis adjustments and specifies how hedge basis adjustments should be considered in determining credit losses for assets in the designated closed portfolio. This ASU is effective for public business entities for interim and annual periods in fiscal years beginning after December 15, 2022. The Bank adopted the ASU effective April 1, 2023. The adoption of this guidance did not have a material impact on the Bank’s consolidated financial position or results of operation. In March 2022, the FASB issued ASU 2022-02 “Financial Instruments—Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures”, which eliminates the accounting guidance for TDRs by creditors in Subtopic 310-40 “Receivables—Troubled Debt Restructurings by Creditors”. This ASU enhances disclosure requirements for certain loan refinancing and restructuring activity by creditors when a borrower is experiencing financial difficulty, updates certain requirements related to accounting for credit losses under ASC 326 and requires disclosure of current-period gross write offs of financing receivables by year of origination. The ASU is effective for the Bank for interim and annual periods in fiscal years beginning after December 15, 2022. The Bank adopted the ASU effective April 1, 2023. The adoption of this guidance did not have a material impact on the Bank’s consolidated financial position or results of operation.
Recently issued accounting pronouncements not yet effective	aa. Recently issued accounting pronouncements not yet effective In November 2023, the FASB issued ASU 2023-07, “Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures.” This ASU requires disclosure of significant segment expenses that are regularly provided to the chief operating decision maker (“CODM”), an amount for other segment items by reportable segment and a description of its composition, all annual disclosures required by FASB ASU Topic 280 in interim periods as well, and the title and position of the CODM and how the CODM uses the reported measures. The amendments in this ASU are intended to improve reportable segment disclosure requirements primarily through enhanced disclosures about significant segment expenses. This ASU is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024. Early adoption is permitted. The amendments should be applied retrospectively. The Bank does not expect the adoption of ASU 2023-07 to have a material impact on its consolidated financial statements. In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures. The update requires enhanced annual disclosures for specific categories in the rate reconciliation and income taxes paid disaggregated by federal, state and foreign taxes. ASU 2023-09 is effective for annual periods beginning after December 15, 2024. The Bank does not expect the adoption of ASU 2023-09 to have a material impact on its consolidated financial statements.
Convenience translation	ab. Convenience translation The accompanying financial statements have been expressed in the as published by the Federal Reserve Board of New York on March 29, 2024. Such translation should not be construed as a representation that the rupee amounts have been or could be converted into United States dollars at that or any other rate, or at all.

Summary of significant accoun_3

Summary of significant accounting policies (Tables)	12 Months Ended
	Mar. 31, 2024
Schedule of Composite depreciation rate	Property and equipment are stated at cost, less accumulated depreciation. Depreciation is provided over the estimated useful lives of property and equipment on a straight-line basis at the following rates: Type of Asset Rate of depreciation Premises 1.67% Software and systems 20.00% Equipment and furniture 10.00%-33.33%
Schedule of intangible assets and basis of amortization	Indefinite-lived intangible assets are not amortized but are tested for impairment annually, or more frequently, if necessary. Intangible Assets Useful lives (years) Amortization method Brand Indefinite Not applicable Investment Management Contract Indefinite Not applicable Value of Business Acquired (VOBA) Life of the underlying contracts Constant level basis(*) Distribution Network 17 Straight line Customer Relationship 17 Straight line Transferable Development Rights 8 Straight line ( ) VOBA is amortized on a constant-level basis that approximates straight-line amortization (Refer note 20)

Business Combination (Tables)

Business Combination (Tables)	12 Months Ended
	Mar. 31, 2024
Business Combinations [Abstract]
Asset acquired liabilities assumed In business combination	The following table provides a purchase price allocation to of Particulars As of July 1, 2023, (In millions) Consideration Common equity share issued (3,110,396,492 shares of the R s. 5,292,028.6 US$ 63,499.3 Share-based compensation 35,240.7 422.9 Share w 10,472.2 125.7 Fair value of total transferred 5,337,741.5 64,047.9 Settlement of p (refer note below) (69,312.6 ) (831.7 ) Investment in the Bank by eHDFC (refer note below)  (1,981,494.4 )  (23,776.0 ) Fair value of net purchase consideration transferred 3,286,934.5 39,440.2 Acquisition-related costs 1,900.0 22.8 Less: A.  Cash and due from banks 10,344.1 124.1 Investment securities 2,842,356.2 34,105.5 Loans - Net 6,428,635.4 77,137.5 Accrued interest receivable 37,276.7 447.3 Property and equipment 39,136.2 469.6 Identified intangibles assets 1,434,818.1 17,216.4 Other assets 622,978.8 7,475.1 Separate account assets 857,528.7 10,289.5 Total estimated assets acquired  12,273,074.2  147,265.0 Add: B. Deposits 1,571,204.5 18,852.9 Accrued expenses and other liabilities 781,742.3 9,380.0 Borrowings 4,977,276.5 59,722.5 Separate account liabilities 857,528.7 10,289.5 Liabilities on policies in force 1,499,749.1 17,995.5 Noncontrolling Interest in eHDFC subsidiaries 926,787.1 11,120.6 Total estimated liabilities assumed 10,614,288.2 127,361.0 Goodwill 1,628,148.5  19,536.2
Goodwill recorded as a result of the acquisition to the Bank's reportable segments	The assignment of Goodwill recorded as a result of the acquisition to the Bank’s reportable segments is as follows: Particulars As of July 1, 2023, (In millions) Retail Banking Rs.  368,079.6 US$  4,416.6 Wholesale Banking 71,617.3 859.3 Insurance Services 959,080.0 11,508.0 Others 229,371.6 2,752.3 Total  1,628,148.5  19,536.2
Major class of identifiable acquired intangible assets and estimated period of amortisation	The following table summarizes the major class of identifiable acquired intangible assets and estimated period of amortization- As of July 1, 2023 Estimated Fair Value (In millions) Useful lives (in years) Valuation Methodology Intangible asset Brand Rs. 750,758.2 US$ 9,008.4 Indefinite life Relief from royalty method (a) Investment management contract 369,785.6 4,437.1 Indefinite life (b) Value of business acquired 221,738.5 2,660.6 Life of the underlying contracts Refer below (c) Distribution network 59,543.2 714.5 17 (b) Customer relationship 29,874.9 358.4 17 (b) Transferable development rights 3,117.7 37.4 8 Comparison method Total 1,434,818.1 17,216.4
Pro forma financial information	The unaudited pro forma information should not be relied upon as being indicative of the historical results of operations that would have occurred had the acquisition taken place on April 01, 2022. As of Particulars March 31, 2023 March 31, 2024 (In million) Revenue (a) Rs.  2,147,961.5 US$  25,773.5 Rs.  2,303,956.6 US$  27,645.3 Net Income 636,783.4 7,640.8 645,526.0 7,745.7 (a) Revenue includes net interest revenue and non-interest revenue. Acquisition costs are included in the periods where such expenses are incurred
Details of PCD of eHDFC	Following are the details of PCD of eHDFC acquired. As of July 1, 2023 Particulars Wholesale Retail Total Total (In millions) Par value of PCD l Rs . 72,684.7 Rs . 43,961.6 Rs . 116,646.3 US $ 1,399.6 Allowance for credit losses on PCD l 36,487.3 2,927.9 39,415.2 472.9 Fair value of receivables at acquisition 36,197.4 41,003.0 77,200.4 926.3 Non-credit — 30.7 30.7 0.4
Details of pre-exiting relationship between HDFC Bank group ("the Bank and its subsidiaries") and eHDFC group	Following are the details of pre-exiting As of July 1, 2023 (In millions) Financial statement line items Cash and due from Banks Rs . 52,875.3 US$ 634.4 Investments, available for sale, at market 18,407.5 220.9 Accrued expenses and other liabilities (5,777.5 ) (69.3 ) Other assets 3,807.3 45.7 Net Assets R s . 69,312.6 US$ 831.7

Investments (Tables)

Investments (Tables)	12 Months Ended
	Mar. 31, 2024
Portfolio of Trading Securities or Held for Trading Securities Amortized Cost Fair Value	The portfolio of trading securities as of March 31, 2023 and March 31, 2024 was as follows: As of March 31, 2023 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (In millions) Government of India securities Rs. 106,952.3 Rs. 103.6 Rs. 23.2 Rs. 107,032.7 Other corporate/financial institution securities 20,361.5 19.0 2.5 20,378.0 Total debt securities Rs. 127,313.8 Rs. 122.6 Rs. 25.7 Rs. 127,410.7 Other securities (including mutual fund units) 8,166.4 254.0 —  8,420.4 Total Rs. 135,480.2 Rs. 376.6 Rs. 25.7 Rs. 135,831.1 As of March 31, 2024 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (In millions) Government of India securities Rs. 71,673.0 Rs. 58.8 Rs. —  Rs. 71,731.8 Other corporate/financial institution securities 31,833.9 77.3 205.0 31,706.2 Total debt securities Rs. 103,506.9 Rs. 136.1 Rs. 205.0 Rs. 103,438.0 Other securities (including mutual fund units) 289,321.4 75,918.2 7,432.3 357,807.3 Total Rs. 392,828.3 Rs. 76,054.3 Rs. 7,637.3 Rs. 461,245.3 Total US$ 4,713.5 US$ 912.6 US$ 91.6 US$ 5,534.5
Available for Sale Securities Amortized Cost and Fair Value	The fair value of credit substitutes by type of instrument as of March 31, 2023 and March 31, 2024 were as follows: As of March 31, 2023 2024 Amortized Cost Fair Value Amortized Cost Fair Value (In millions) Available for sale credit substitute debt securities: Debentures Rs. 510,880.4 Rs. 503,187.6 Rs. 132,926.5 Rs. 131,458.6 Preference shares 281.0 0.2 271.3 28.3 Commercial paper —  —  —  —  Total Rs. 511,161.4 Rs. 503,187.8 Rs. 133,197.8 Rs. 131,486.9 US$ 1,598.2 US$ 1,577.7
Summary of Allowances for Available for sale debt securities	Allowances for AFS debt securities as of March 31, 2023 are as follows: As of March 31, 2023 Allowance for credit losses, beginning of the period Write-offs Addition/ allowance for credit losses Allowance for credit losses, end of (In millions) Credit substitutes Rs. —  Rs. —  Rs. 70.9 Rs. 70.9 Other corporate/financial institution bonds —  —  —  —  Total Rs. —  Rs. —  Rs. 70.9 Rs. 70.9 Allowances for AFS debt securities as of March 31, 2024 are as follows: As of March 31, 2024 Allowance for the period Write-offs Addition/ allowance for credit losses Allowance for (In millions) Credit substitutes Rs. 70.9 Rs. —  Rs. (70.9 ) Rs. —  Other corporate/financial institution bonds —  —  —  —  Total Rs. 70.9 Rs. —  Rs. (70.9 ) Rs. —  Total US$  0.9 US$  —  US$  (0.9 ) US$  —
Available-for-Sale Debt Securities
Available for Sale Securities Amortized Cost and Fair Value	The portfolio of AFS debt securities as of March 31, 2023 and March 31, 2024 was As of March 31, 2023 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (In millions) Government of India securities Rs. 3,860,431.8 Rs. 4,656.4 Rs. 80,344.5 Rs. 3,784,743.7 State government securities 428,980.9 1,322.5 15,604.8 414,698.6 Government securities outside India 819.0 —  21.8 797.2 Credit substitutes (see note 8 511,161.4 505.4 8,479.0 503,187.8 Other corporate/financial institution bonds 27,521.4 13.4 571.3 26,963.5 Debt securities, other than asset and mortgage-backed securities 4,828,914.5 6,497.7 105,021.4 4,730,390.8 Mortgage-backed securities 19.3 —  1.8 17.5 Asset-backed securities 150,271.9 55.2 1,891.4 148,435.7 Total Rs. 4,979,205.7 Rs. 6,552.9 Rs. 106,914.6 Rs. 4,878,844.0 Securities with gross unrealized losses Rs. 3,220,573.8 Securities with gross unrealized gains 1,658,270.2 Rs. 4,878,844.0 As of March 31, 2024 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (In millions) Government of India securities Rs. 6,105,313.9 Rs. 41,090.5 Rs. 52,213.3 Rs. 6,094,191.1 State government securities 1,188,315.0 7,600.4 12,234.4 1,183,681.0 Government securities outside India 3,556.3 3.9 18.4 3,541.8 Credit substitutes (see note 8 133,197.8 321.7 2,032.6 131,486.9 Other corporate/financial institution bonds 736,923.7 16,136.6 9,022.2 744,038.1 Debt securities, other than asset and mortgage-backed securities 8,167,306.7 65,153.1 75,520.9 8,156,938.9 Mortgage-backed securities 78.1 2.3 1.2 79.2 Asset-backed securities 138,775.7 335.6 642.3 138,469.0 Total Rs. 8,306,160.5 Rs. 65,491.0 Rs. 76,164.4 Rs. 8,295,487.1 Total US$ 99,666.0 US$ 785.8 US$ 913.9 US$ 99,537.9 Securities with gross unrealized losses Rs. 3,706,475.3 Securities with gross unrealized gains 4,589,011.8 Rs. 8,295,487.1 US$ 99,537.9
Unrealized loss position investments	The below table presents the gross unrealized losses and the associated fair value of AFS debt securities and whether these securities have had gross unrealized losses for less than 12 months or 12 months or greater as of March 31, 2023: As of March 31, 2023 Less Than 12 Months 12 Months or Greater Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses (In millions) Government of India securities Rs.  1,038,004.8 Rs.  12,622.5 Rs.  1,266,775.4 Rs.  67,722.0 Rs.  2,304,780.2 Rs. 80,344.5 State government securities 75,707.7 1,923.6 270,099.2 13,681.2 345,806.9 15,604.8 Government securities outside India 797.2 21.8 —  —  797.2 21.8 Credit substitutes (see note 8 254,023.6 3,771.0 152,702.6 4,708.0 406,726.2 8,479.0 Other corporate/financial institution bonds 21,596.9 443.0 4,205.1 128.3 25,802.0 571.3 Debt securities, other than asset- and mortgage-backed securities 1,390,130.2 18,781.9 1,693,782.3 86,239.5 3,083,912.5 105,021.4 Mortgage-backed securities —  —  17.5 1.8 17.5 1.8 Asset-backed securities 110,545.7 1,077.3 26,098.1 814.1 136,643.8 1,891.4 Total Rs. 1,500,675.9 Rs. 19,859.2 Rs. 1,719,897.9 Rs. 87,055.4 Rs. 3,220,573.8 Rs.  106,914.6 The below table presents the gross unrealized losses and the associated fair value of AFS debt securities and whether these securities have had gross unrealized losses for less than 12 months or 12 months or greater as of March 31, 2024: As of March 31, 2024 Less Than 12 Months 12 Months or Greater Total  Fair Value  Unrealized Losses  Fair Value  Unrealized Losses  Fair Value   Unrealized  Losses (In millions) Government of India securities Rs. 566,117.5 Rs. 177.4 Rs. 2,179,342.3 Rs. 52,035.9 Rs. 2,745,459.8 Rs. 52,213.3 State government securities 103,876.2 199.2 440,474.4 12,035.2 544,350.6 12,234.4 Government securities outside India —  —  814.3 18.4 814.3 18.4 Credit substitutes (see note 8 5,745.3 293.3 97,997.4 1,739.3 103,742.7 2,032.6 Other corporate/financial institution bonds 12,899.6 165.7 237,927.5 8,856.5 250,827.1 9,022.2 Debt securities, other than asset- and mortgage-backed securities 688,638.6 835.6 2,956,555.9 74,685.3 3,645,194.5 75,520.9 Mortgage-backed securities —  —  13.5 1.2 13.5 1.2 Asset-backed securities —  —  61,267.3 642.3 61,267.3 642.3 Total Rs.  688,638.6 Rs.  835.6 Rs.  3,017,836.7 Rs.  75,328.8 Rs.  3,706,475.3 Rs.  76,164.4 Total US$ 8,263.0 US$ 10.0 US$ 36,211.1 US$ 903.9 US$ 44,474.1 US$ 913.9
Debt securities, other than asset and mortgage-backed securities | Available-for-Sale Debt Securities
Investments Classified by Contractual Maturity Date	The contractual residual maturity As of March 31, 2024 Amortized Cost Fair Value Fair Value (In millions) Within one year Rs.  1,216,195.2 Rs.  1,213,814.5 US$ 14,564.6 Over one year through five years 1,704,481.9 1,693,976.3 20,326.1 Over five years through ten years 2,910,153.3 2,895,370.6 34,741.7 Over ten years 2,336,476.3 2,353,777.5 28,243.1 Total Rs.  8,167,306.7 Rs.  8,156,938.9 US$  97,875.5
Asset and Mortgage Backed Securities | Available-for-Sale Debt Securities
Investments Classified by Contractual Maturity Date	The contractual residual maturity of AFS mortgage-backed and asset-backed debt securities as of March 31, 2024 is set out below: As of March 31, 2024 Amortized Cost Fair Value Fair Value (In millions) Within one year Rs.     61,860.3 Rs.     61,602.9 US$ 739.2 Over one year through five years 76,625.4 76,564.7 918.7 Over five years through ten years 315.6 326.2 3.9 Over ten years 52.5 54.4 0.6 Total Rs.  138,853.8 Rs.  138,548.2 US$  1,662.4
Realized Investment Gains Losses Net	Gross realized gains and gross realized losses from sale of AFS debt securities and dividends and interest on such securities are set out below: Fiscal year ended March 31, 2022 2023 2024 2024 (In millions) Gross realized gains on sale Rs. 18,604.5 Rs. 259.1 Rs. 3,592.4 US$ 43.1 Gross realized losses on sale (1,858.7 ) (979.4 ) (2,765.7 ) (33.2 ) Realized gains/ (losses), net 16,745.8 (720.3 ) 826.7 9.9 Dividends and interest 240,943.0 304,566.7 516,550.0 6,198.1 Total Rs. 257,688.8 Rs. 303,846.4 Rs. 517,376.7 US$ 6,208.0

Credit substitutes (Tables)

Credit substitutes (Tables)	12 Months Ended
	Mar. 31, 2024
Fair value of credit substitutes	The fair value of credit substitutes by type of instrument as of March 31, 2023 and March 31, 2024 were as follows: As of March 31, 2023 2024 Amortized Cost Fair Value Amortized Cost Fair Value (In millions) Available for sale credit substitute debt securities: Debentures Rs. 510,880.4 Rs. 503,187.6 Rs. 132,926.5 Rs. 131,458.6 Preference shares 281.0 0.2 271.3 28.3 Commercial paper —  —  —  —  Total Rs. 511,161.4 Rs. 503,187.8 Rs. 133,197.8 Rs. 131,486.9 US$ 1,598.2 US$ 1,577.7
Credit substitutes by bank's internal credit quality indicators	The fair value of credit substitutes by the As of March 31, 2023 2024 2024 (In millions) Pass Rs. 503,187.8 Rs. 131,486.9 US$ 1,577.7 Non-performing—gross balance —  —  —  Less: Non-performing losses —  —  —  Non-performing credit substitutes, net —  —  —  Total credit substitutes, net Rs. 503,187.8 Rs. 131,486.9 US$ 1,577.7
Impaired credit substitutes	The following table provides information on non-performing credit substitutes as of March 31, 2023 and As of March 31, 2023 2024 2024 (In millions) Gross non-performing credit substitutes Rs  —  Rs  —  US$  —  Gross non-performing credit substitutes by industry Rs.  —  Rs.  —  US$  —  Average non-performing credit substitutes Rs.  —  Rs.  —  US$  —  Interest income recognized on non-performing credit substitutes Rs.  —  Rs.  —  US$  —

Loans (Tables)

Loans (Tables)	12 Months Ended
	Mar. 31, 2024
Loans by Facility	Loans by facility as of March 31, 2023 and March 31, 2024 were as follows: As of March 31, 2023 2024 2024 (In millions) Retail loans: Auto loans Rs.  1,221,097.6 Rs.  1,378,523.1 US$ 16,541.0 Personal loans/Credit cards 2,782,828.5 3,119,246.7 37,428.0 Retail business banking 3,378,625.2 4,207,836.2 50,490.0 Commercial vehicle and construction equipment finance 1,285,887.8 1,619,602.9 19,433.7 Housing loans 1,020,901.6 6,993,168.0 83,911.3 Other retail loans 1,817,239.6 2,272,031.2 27,262.1 Subtotal Rs.  11,506,580.3 Rs.  19,590,408.1 US$ 235,066.1 Wholesale loans Rs.  5,911,512.1 Rs.  7,202,639.3 US$ 86,424.7 Gross loans 17,418,092.4 26,793,047.4 321,490.8 Less: Allowance for credit losses 365,164.5 457,346.5 5,487.7 Total Rs.  17,052,927.9 Rs.  26,335,700.9 US$  316,003.1
Financing Receivable, by Maturity	The maturity of gross loans as of March 31, 2024 is set out below: As of March 31, 2024 Wholesale loans Retail loans Total (In millions) Maturity profile of loans: Within one year Rs.  2,011,692.4 Rs.  4,191,712.5 Rs.  6,203,404.9 Over one year through five years 3,675,651.9 9,992,377.8 13,668,029.7 Over five years 1,515,295.0 5,406,317.8 6,921,612.8 Total Rs.  7,202,639.3 Rs.  19,590,408.1 Rs.  26,793,047.4 Total US$ 86,424.7 US$ 235,066.1 US$ 321,490.8
Past Due Financing Receivables	The followi ng analysis a As of March 31, 2023 31-90 days Non-accrual/ Current (1), (2) Total Finance on non-accrual (In millions) Retail Loans Auto loans Rs.  5,738.3 Rs.  15,941.6 Rs. 1,199,417.7 Rs.  1,221,097.6 Rs.  15,941.6 Personal loans/Credit card 20,871.1 22,770.1 2,739,187.3 2,782,828.5 22,770.1 Retail business banking 21,241.0 43,937.8 3,313,446.4 3,378,625.2 43,937.8 Commercial vehicle and construction equipment finance 15,089.3 21,823.8 1,248,974.7 1,285,887.8 21,823.8 Housing loans 3,916.0 5,900.3 1,011,085.3 1,020,901.6 5,900.3 Other retail 30,007.7 56,822.9 1,730,409.0 1,817,239.6 56,822.9 Wholesale loans 3,905.0 33,512.3 5,874,094.8 5,911,512.1 33,512.3 Total Rs.  100,768.4 Rs.  200,708.8 Rs.  17,116,615.2 Rs.  17,418,092.4 Rs.  200,708.8 (1) Loans up to 30 days past due are considered current. (2) Includes crop-related agricultural loans with days past due less than 366 as they are not considered as non-performing of Rs. 31.8 billion. As of March 31, 2024 31-90 days Non-accrual/ Current (1),(2) Total Finance (In millions) Retail Loans Auto loans Rs.  6,083.8 Rs.  14,998.0 Rs.  1,357,441.3 Rs.  1,378,523.1 Rs.  14,998.0 Personal loans/Credit card 24,446.2 25,466.5 3,069,334.0 3,119,246.7 25,466.5 Retail business banking 12,571.8 53,355.4 4,141,909.0 4,207,836.2 53,355.4 Commercial vehicle and construction equipment finance 19,351.4 21,563.6 1,578,687.9 1,619,602.9 21,563.6 Housing loans 37,025.6 43,712.7 6,912,429.7 6,993,168.0 43,712.7 Other retail 26,479.0 61,520.0 2,184,032.2 2,272,031.2 61,520.0 Wholesale loans 35,202.1 106,827.7 7,060,609.5 7,202,639.3 106,827.7 Total Rs.  161,159.9 Rs.  327,443.9 Rs.  26,304,443.6 Rs.  26,793,047.4 Rs.  327,443.9 Total US$ 1,933.8 US$ 3,929.0 US$ 315,628.0 US$ 321,490.8 US$ 3,929.0 (1) Loans up to 30 days past due are considered current. (2) Includes crop-related agricultural loans with days past due less than 366 as they are not considered as non-performing of Rs. 35.4 billion.
Allowance for Credit Losses on Financing Receivables	Allowances for credit losses as of March 31, 2022 are as follows: Auto loans Personal Retail Commercial Housing Other Wholesale Total (In millions) Allowance for credit losses, beginning of the period Rs.  39,396.1 Rs.  110,081.0 Rs.  42,288.4 Rs. 26,356.7 Rs.  4,578.0 Rs.  49,229.2 Rs. 71,599.3 Rs.  343,528.7 Write-offs (19,376.9 ) (74,500.8 ) (3,027.7 ) (16,592.0 ) (601.6 ) (17,567.4 ) (2,351.4 ) (134,017.8 ) Net allowance for credit losses (*) 21,750.2 75,986.2 9,794.3 21,986.2 (1,284.2 ) 29,775.2 5,153.0 163,160.9 Allowance for credit losses, end of the period Rs.  41,769.4 Rs. 111,566.4 Rs. 49,055.0 Rs.  31,750.9 Rs. 2,692.2 Rs. 61,437.0 Rs.  74,400.9 Rs. 372,671.8 Allowance for credit losses: Individually evaluated allowance Rs. 18.4 Rs. 6.5 Rs. 2,651.4 Rs. 65.8 Rs. —  Rs. 92.3 Rs. 35,619.7 Rs. 38,454.1 Collectively evaluated allowance 41,751.0 111,559.9 46,403.6 31,685.1 2,692.2 61,344.7 38,781.2 334,217.7 Loans: Individually evaluated loans 31.5 29.4 2,651.4 66.3 —  126.6 41,832.9 44,738.1 Collectively evaluated loans 1,042,761.5 2,341,942.4 2,614,435.7 950,999.7 830,882.4 1,526,607.8 5,057,176.4 14,364,805.9 ( ) Net allowances for credit losses charged to expense does not include the recoveries against write-off cases amounting to Rs.36,181.4 million. Recoveries from retail loans is Rs.35,385.3 million and from wholesale loans is Rs.796.1 million. Allowances for credit losses as of March 31, 2023 are as follows: Auto loans Personal Retail Commercial Housing Other Wholesale Total (In millions) Allowance for credit losses, beginning of the period Rs.  41,769.4 Rs.  111,566.4 Rs.  49,055.0 Rs.  31,750.9 Rs.  2,692.2 Rs.  61,437.0 Rs.  74,400.9 Rs.  372,671.8 Write-offs (10,456.0 ) (88,744.9 ) (3,987.8 ) (15,270.1 ) (479.0 ) (15,769.9 ) (3,156.0 ) (137,863.7 ) Net allowance for credit losses (*) 2,522.1 76,812.9 18,907.6 14,649.8 1,056.7 26,345.3 (9,938.0 ) 130,356.4 Allowance for credit losses, end of the period Rs. 33,835.5 Rs. 99,634.4 Rs. 63,974.8 Rs. 31,130.6 Rs. 3,269.9 Rs. 72,012.4 Rs. 61,306.9 Rs. 365,164.5 Allowance for credit losses: Individually evaluated allowance Rs. 4.6 Rs. —  Rs. 2,320.3 Rs. 15.0 Rs. —  Rs. 92.1 Rs. 29,264.6 Rs. 31,696.6 Collectively evaluated allowance 33,830.9 99,634.4 61,654.5 31,115.6 3,269.9 71,920.3 32,042.3 333,467.9 Loans: Individually evaluated loans 16.4 0.8 2,782.0 290.8 —  92.3 33,879.5 37,061.8 Collectively evaluated loans 1,221,081.2 2,782,827.7 3,375,843.2 1,285,597.0 1,020,901.6 1,817,147.3 5,877,632.6 17,381,030.6 ( ) Net allowances for credit losses charged to expense does not include the recoveries against write-off cases amounting to Rs. 56,142.6 millio n Allowances for credit losses as of March 31, 2024 are as follows: Auto loans Personal Retail Commercial Housing Other Wholesale Total Total (In millions) Allowance for credit losses, beginning of the period Rs. 33,835.5 Rs. 99,634.4 Rs. 63,974.8 Rs. 31,130.6 Rs. 3,269.9 Rs. 72,012.4 Rs. 61,306.9 Rs. 365,164.5 US$ 4,381.6 Allowance for credit losses on PCD Loans at acquisition —  —  —  —  2,927.9 —  36,487.3 39,415.2 472.9 Write-offs (8,648.1 ) (74,794.1 ) (1,630.1 ) (9,796.1 ) (12,013.2 ) (18,530.4 ) (3,575.2 ) (128,987.2 ) (1,547.7) Net allowance for credit losses (*) 4,761.5 92,159.3 12,955.8 10,761.6 15,722.2 26,971.8 (18,421.8 ) 181,754.0 2,180.9 Allowance for credit losses, end of the period Rs. 29,948.9 Rs. 116,999.6 Rs. 75,300.5 Rs. 32,096.1 Rs. 9,906.8 Rs. 80,453.8 Rs. 112,640.8 Rs. 457,346.5 US$5,487.7 Allowance for credit losses: Individually evaluated allowance Rs. 8.0 Rs. 1.0 Rs. 2,498.3 Rs. 184.4 Rs. —  Rs. 156.8 Rs. 68,886.9 Rs. 71,735.4 US$ 860.7 Collectively evaluated allowance 29,940.9 116,998.6 72,802.2 31,911.7 9,906.8 80,297.0 43,753.9 385,611.1 4,627.0 Loans: Individually evaluated loans 8.0 1.0 2,924.9 184.4 —  156.8 107,439.4 110,714.5 1,328.4 Collectively evaluated loans 1,378,515.1 3,119,245.7 4,204,911.3 1,619,418.5 6,993,168.0 2,271,874.4 7,095,199.9 26,682,332.9 320,162.4 (*) Net allowances for credit losses charged to expense does not include the recoveries against
Interest on Loans by Facility	Interest on loan s Fiscal year 2022 2023 2024 2024 (In millions) Wholesale loans Rs. 250,779.5 Rs. 363,842.1 Rs. 555,377.8 US$ 6,664.0 Retail loans 807,146.1 987,975.9 1,617,982.2 19,414.2 Other loans —  —  21,165.5 254.0 Total Rs. 1,057,925.6 Rs. 1,351,818.0 Rs. 2,194,525.5 US$ 26,332.2
Retail Loans
Financing Receivable Credit Quality Indicators	The following table provides information on primary credit quality indicators as of March 31, 2023: Term loans by origination Credit quality indicators-Internally Prior 2019 2020 2021 2022 2023 Revolving Revolving Total (In millions) Auto loans Performing Rs. 14,387.2 Rs. 37,425.2 Rs. 90,148.4 Rs. 160,443.6 Rs. 308,076.9 Rs. 525,693.8 Rs. 68,980.9 Rs. —  Rs. 1,205,156.0 Non-performing 1,129.9 2,324.4 3,858.8 2,875.4 1,990.0 748.9 3,014.2 —  15,941.6 Subtotal Rs. 15,517.1 Rs. 39,749.6 Rs. 94,007.2 Rs. 163,319.0 Rs. 310,066.9 Rs. 526,442.7 Rs. 71,995.1 Rs. —  Rs. 1,221,097.6 Personal loans/Credit card Performing Rs. 2,431.4 Rs. 20,673.2 Rs. 86,038.7 Rs. 155,911.2 Rs. 490,598.8 Rs. 1,206,873.5 Rs. 482,500.3 Rs. 315,031.3 Rs. 2,760,058.4 Non-performing 346.6 1,440.1 3,511.1 2,518.9 3,411.9 2,254.3 8,869.6 417.6 22,770.1 Subtotal Rs. 2,778.0 Rs. 22,113.3 Rs. 89,549.8 Rs. 158,430.1 Rs. 494,010.7 Rs. 1,209,127.8 Rs. 491,369.9 Rs. 315,448.9 Rs. 2,782,828.5 Retail business banking Performing Rs. 75,583.1 Rs. 58,914.7 Rs. 94,372.2 Rs. 185,698.6 Rs. 412,305.0 Rs. 600,147.3 Rs. 1,907,666.5 Rs. —  Rs. 3,334,687.4 Non-performing 4,851.6 2,996.8 2,847.2 4,136.3 1,558.3 218.4 27,329.2 —  43,937.8 Subtotal Rs. 80,434.7 Rs. 61,911.5 Rs. 97,219.4 Rs. 189,834.9 Rs. 413,863.3 Rs. 600,365.7 Rs. 1,934,995.7 Rs. —  Rs. 3,378,625.2 Commercial vehicle and construction equipment finance Performing Rs. 3,981.3 Rs. 19,618.5 Rs. 49,030.6 Rs. 92,773.8 Rs. 277,461.6 Rs. 629,405.5 Rs. 191,792.7 Rs. —  Rs. 1,264,064.0 Non-performing 398.0 2,582.1 4,491.4 4,696.0 3,053.3 763.8 5,839.2 —  21,823.8 Subtotal Rs. 4,379.3 Rs. 22,200.6 Rs. 53,522.0 Rs. 97,469.8 Rs. 280,514.9 Rs. 630,169.3 Rs. 197,631.9 Rs. —  Rs. 1,285,887.8 Housing loans Performing Rs. 394,712.3 Rs. 160,447.9 Rs. 143,037.0 Rs. 120,214.8 Rs. 167,130.4 Rs. 29,458.9 Rs. —  Rs. —  Rs. 1,015,001.3 Non-performing 4,031.5 1,206.1 358.8 180.2 123.3 0.4 —  —  5,900.3 Subtotal Rs. 398,743.8 Rs. 161,654.0 Rs. 143,395.8 Rs. 120,395.0 Rs. 167,253.7 Rs. 29,459.3 Rs. —  Rs. —  Rs. 1,020,901.6 Other retail loans Performing Rs. 5,564.3 Rs. 10,063.3 Rs. 18,382.0 Rs. 42,416.7 Rs. 150,038.1 Rs. 603,873.8 Rs. 930,078.5 Rs. —  Rs. 1,760,416.7 Non-performing 3,000.6 3,254.9 11,339.9 3,171.9 2,261.4 971.8 32,822.4 —  56,822.9 Subtotal Rs. 8,564.9 Rs. 13,318.2 Rs. 29,721.9 Rs. 45,588.6 Rs. 152,299.5 Rs. 604,845.6 Rs. 962,900.9 Rs. —  Rs. 1,817,239.6 Total Rs.  510,417.8 Rs.  320,947.2 Rs.  507,416.1 Rs.  775,037.4 Rs.  1,818,009.0 Rs.  3,600,410.4 Rs.  3,658,893.5 Rs.  315,448.9 Rs.  11,506,580.3 The following table provides information on primary cre dit Term loans by origination Credit quality Prior 2020 2021 2022 2023 2024 Revolving Revolving Total (In millions) Auto loans Performing Rs. 15,314.7 Rs. 40,203.8 Rs. 86,953.7 Rs. 198,895.3 Rs.  398,936.3 Rs. 540,605.2 Rs. 82,616.1 Rs. —  Rs.  1,363,525.1 Non-performing 1,771.7 1,908.9 1,908.6 2,729.8 3,204.6 779.7 2,694.7 —  14,998.0 Subtotal Rs. 17,086.4 Rs. 42,112.7 Rs. 88,862.3 Rs. 201,625.1 Rs. 402,140.9 Rs. 541,384.9 Rs. 85,310.8 Rs. —  Rs. 1,378,523.1 Write off 1,376.8 1,913.2 1,683.1 1,835.8 1,688.5 150.7 —  —  8,648.1 Personal loans/Credit card Performing Rs. 4,198.8 Rs. 28,112.1 Rs. 62,604.2 Rs. 237,689.5 Rs. 642,360.7 Rs. 1,192,606.3 Rs. 560,472.3 Rs. 365,736.3 Rs. 3,093,780.2 Non-performing 726.8 1,486.5 1,668.2 3,127.9 5,912.5 2,544.9 9,674.2 325.5 25,466.5 Subtotal Rs. 4,925.6 Rs. 29,598.6 Rs. 64,272.4 Rs. 240,817.4 Rs. 648,273.2 Rs. 1,195,151.2 Rs. 570,146.5 Rs. 366,061.8 Rs. 3,119,246.7 Write off 1,681.8 4,635.9 3,526.2 10,050.8 17,073.2 2,838.5 21,307.8 13,679.9 74,794.1 Retail business banking Performing Rs. 88,129.0 Rs. 62,739.9 Rs. 108,288.3 Rs. 317,668.3 Rs. 527,853.5 Rs. 701,602.8 Rs.  2,348,199.0 Rs. —  Rs. 4,154,480.8 Non-performing 8,083.4 1,933.2 3,454.1 2,118.8 851.1 135.0 36,779.8 —  53,355.4 Subtotal Rs. 96,212.4 Rs. 64,673.1 Rs. 111,742.4 Rs. 319,787.1 Rs. 528,704.6 Rs. 701,737.8 Rs. 2,384,978.8 Rs. —  Rs. 4,207,836.2 Write off 1,163.3 298.8 138.6 19.7 0.2 —  9.5 —  1,630.1 Commercial vehicle and construction equipment finance Performing Rs. 9,984.2 Rs. 16,357.7 Rs. 33,797.5 Rs. 156,354.0 Rs. 456,722.6 Rs. 722,457.1 Rs. 202,366.2 Rs. —  Rs. 1,598,039.3 Non-performing 2,628.4 1,628.6 2,641.9 3,588.5 4,859.6 1,204.9 5,011.7 —  21,563.6 Subtotal Rs. 12,612.6 Rs. 17,986.3 Rs. 36,439.4 Rs. 159,942.5 Rs. 461,582.2 Rs. 723,662.0 Rs. 207,377.9 Rs. —  Rs. 1,619,602.9 Write off 1,547.1 2,379.5 1,597.7 2,231.2 1,935.0 104.3 1.3 —  9,796.1 Housing loans Performing Rs. 1,351,187.2 Rs. 565,617.9 Rs. 735,921.2 Rs. 1,170,433.9 Rs. 1,476,703.5 Rs. 1,649,591.6 Rs. —  Rs. —  Rs. 6,949,455.3 Non-performing 22,222.3 6,506.8 5,569.9 4,869.8 3,804.6 739.3 —  —  43,712.7 Subtotal Rs. 1,373,409.5 Rs. 572,124.7 Rs. 741,491.1 Rs. 1,175,303.7 Rs. 1,480,508.1 Rs. 1,650,330.9 Rs. —  Rs. —  Rs. 6,993,168.0 Write off 11,133.4 759.5 105.6 7.5 7.2 —  —  —  12,013.2 Other retail loans Performing Rs. 9,040.5 Rs. 9,538.8 Rs. 18,091.4 Rs. 53,746.1 Rs. 200,858.5 Rs. 721,107.1 Rs. 1,198,128.8 Rs. —  Rs. 2,210,511.2 Non-performing 3,885.2 1,892.0 2,161.5 2,405.6 4,053.3 3,129.2 43,993.2 —  61,520.0 Subtotal Rs. 12,925.7 Rs. 11,430.8 Rs. 20,252.9 Rs. 56,151.7 Rs. 204,911.8 Rs. 724,236.3 Rs. 1,242,122.0 Rs. —  Rs. 2,272,031.2 Write off 1,857.3 4,453.7 1,567.6 2,088.9 3,505.0 538.8 4,519.1 —  18,530.4 Total Rs.   1,517,172.2 Rs.   737,926.2 Rs. 1,063,060.5 Rs.   2,153,627.5 Rs. 3,726,120.8 Rs.   5,536,503.1 Rs. 4,489,936.0 Rs.   366,061.8 Rs. 19,590,408.1 Total US$ 18,204.6 US$ 8,854.4 US$ 12,755.7 US$ 25,841.5 US$ 44,709.9 US$ 66,432.7 US$ 53,874.9 US$ 4,392.4 US$ 235,066.1 Total (Write Off) Rs. 18,759.7 Rs. 14,440.6 Rs. 8,618.8 Rs. 16,233.9 Rs. 24,209.1 Rs. 3,632.3 Rs. 25,837.7 Rs. 13,679.9 Rs. 125,412.0 Total (Write Off) US$ 225.1 US$ 173.3 US$ 103.4 US$ 194.8 US$ 290.5 US$ 43.6 US$ 310.0 US$ 164.1 US$ 1,504.8
Wholesale loans
Financing Receivable Credit Quality Indicators	The following table provides information on primary credit quality indicators as of March 31, 2023. Term loans by origination Credit quality indicators-Internally Prior 2019 2020 2021 2022 2023 Revolving Total (In millions) Wholesale loans Pass Rs. 130,723.1 Rs. 135,400.3 Rs. 321,191.0 Rs. 708,309.0 Rs. 1,244,766.9 Rs. 1,471,254.9 Rs. 1,841,015.5 Rs. 5,852,660.7 Labeled 2,625.3 1,586.9 635.7 4,200.8 5,946.5 795.3 9,548.6 25,339.1 Non-performing 3,830.5 1,914.3 66.1 326.4 6,297.4 39.1 21,038.5 33,512.3 Total Rs. 137,178.9 Rs. 138,901.5 Rs. 321,892.8 Rs. 712,836.2 Rs. 1,257,010.8 Rs. 1,472,089.3 Rs. 1,871,602.6 Rs. 5,911,512.1 The following table provides information on primary credit quality indi Term loans by origination Credit quality Prior 2020 2021 2022 2023 2024 Revolving Total (In millions) Wholesale loans Pass Rs.  186,460.1 Rs.  264,241.1 Rs. 560,195.2 Rs.  957,023.5 Rs.  1,200,992.0 Rs.  2,071,787.5 Rs.  1,773,221.5 Rs.  7,013,920.9 Labeled 14,723.3 757.2 17,488.3 14,588.1 16,225.0 11,623.4 6,485.4 81,890.7 Non-performing 45,730.4 3,725.9 14,614.8 8,719.0 5,017.9 7,133.1 21,886.6 106,827.7 Total Rs.  246,913.8 Rs. 268,724.2 Rs.  592,298.3 Rs. 980,330.6 Rs. 1,222,234.9 Rs. 2,090,544.0 Rs. 1,801,593.5 Rs. 7,202,639.3 Total Write off Rs. 2,585.0 Rs. 264.3 Rs. —  Rs. —  Rs. 481.5 Rs. —  Rs. 244.4 Rs. 3,575.2 Total US$ 2,962.7 US$ 3,224.4 US$ 7,107.0 US$ 11,763.0 US$ 14,665.6 US$ 25,084.5 US$ 21,617.5 US$ 86,424.7 Total (Write Off) US$ 31.0 US$ 3.2 US$ —  US$ —  US$ 5.8 US$ —  US$ 2.9 US$ 42.9
Receivable By Industry
Non-performing Financing Receivables	Non-performing loans by industry as of March 31, 2023 and March 31, 2024 are as follows: As of March 31, 2023 (In millions) Gross non-performing loans by industry: — Consumer Loans Rs.  34,684.8 — Agri Production—Food 28,222.2 — Retail Trade 15,044.4 — Agri Allied 13,426.1 — Road Transportation 11,505.0 — Consumer services 10,031.1 — Others (none greater than 5% of non-performing loans) 87,795.2 Total Rs.  200,708.8 As of March 31, 2024 (In millions) Gross non-performing loans by industry: — Consumer Loans Rs.  68,976.4 US$ 827.7 — Real Estate & Property services 65,195.3 782.3 —Agri Production—Food 30,493.3 365.9 — Others (none greater than 5% of non-performing loans) 162,778.9 1,953.1 Total Rs.  327,443.9 US$  3,929.0 Summary information relating to interest income recognized on non-performing loans during the fiscal years ended March 31, 2022, March 31, 2023 and March 31, 2024 is as follows: Fiscal year ended March 31, 2022 2023 2024 2024 (In millions) Interest income recognized on non-performing loans Rs. 11,881.0 Rs. 7,738.0 Rs. 9,675.9 US$  116.1

Concentrations of credit risk (

Concentrations of credit risk (Tables) - Exposure to ten largest borrowers	12 Months Ended
	Mar. 31, 2024
Schedules of Concentration of Risk, by Risk Factor	The Bank’s portfolio of loans, credit substitute securities and non- funded As of March 31, 2023 Category Gross loans Fair value of Non-funded Total % Consumer Loans Rs. 4,410,346.6 Rs. —  Rs. 2,550.8 Rs. 4,412,897.4 22.4 Retail Trade 973,274.3 —  36,013.4 1,009,287.7 5.1 Power 695,716.5 64,805.5 45,576.3 806,098.3 4.1 NBFC 690,783.9 91,595.9 15,995.5 798,375.3 4.1 Financial Institutions 659,117.5 72,068.3 4,435.4 735,621.2 3.7 Consumer Services 581,272.1 3,545.4 123,464.7 708,282.2 3.6 Food and Beverage 566,172.9 1,419.2 49,084.4 616,676.5 3.1 Road Transportation 568,414.2 —  12,512.4 580,926.6 3.0 Coal & Petroleum Products 353,329.8 115,279.8 102,771.3 571,380.9 2.9 Wholesale Trade—Non Industrial 530,057.5 1,988.8 31,887.0 563,933.3 2.9 Automobile & Auto Ancillary 483,658.4 17,656.8 38,921.4 540,236.6 2.7 Real Estate & Property Services 458,906.6 4,691.4 52,228.7 515,826.7 2.6 Wholesale Trade—Industrial 421,900.9 —  70,853.6 492,754.5 2.5 Infrastructure Development 284,690.7 15,220.2 170,452.2 470,363.1 2.4 Engineering 300,745.5 5,596.0 131,956.5 438,298.0 2.2 Agri—Allied 431,581.2 —  2,701.2 434,282.4 2.2 Iron and Steel 360,021.9 12,231.9 61,224.3 433,478.1 2.2 Textiles & Garments 390,883.0 4,984.5 34,729.1 430,596.6 2.2 Telecom 365,112.3 —  42,221.1 407,333.4 2.1 Agri Production—Food 401,720.3 —  1,040.5 402,760.8 2.0 Others (none greater than 2%) 3,490,386.3 92,104.1 719,829.4 4,302,319.8 22.0 Total Rs.  17,418,092.4 Rs.  503,187.8 Rs.  1,750,449.2 Rs.  19,671,729.4 100.0 As of March 31, 2024 Category Gross loans Fair value of Non-funded Total Total % (In millions, except percentages)    Consumer Loans Rs. 10,191,521.5 Rs. —  Rs. 468.1 Rs. 10,191,989.6 US$ 122,294.1 35.1 % NBFC 1,725,559.7 20,585.6 5,153.7 1,751,299.0 21,013.9 6.0 % Retail Trade 1,085,962.9 — 56,822.6 1,142,785.5 13,712.3 3.9 % Real Estate & Property Services 1,070,220.3 3,495.0 57,556.4 1,131,271.7 13,574.2 3.9 % Consumer Services 860,297.1 —  35,933.7 896,230.8 10,753.9 3.1 % Power 770,473.1 37,706.9 63,452.3 871,632.3 10,458.8 3.0 % Infrastructure Development 450,183.2 6,716.0 336,982.5 793,881.7 9,525.8 2.7 % Food and Beverage 712,895.6 1,405.1 59,163.2 773,463.9 9,280.8 2.7 % Road Transportation 741,738.6 — 11,160.3 752,898.9 9,034.1 2.6 % Others (none greater than 2%) 9,184,195.4 61,578.3 1,477,275.2 10,723,048.9 128,666.3 37.0 % Total Rs. 26,793,047.4 Rs.  131,486.9 Rs.  2,103,968.0 Rs.  29,028,502.3 US$ 348,314.2         100.0 %
Fair Value, Concentration of Risk	The Bank’s ten largest exposures as of March 31, 2023 and March 31, 2024, based on the As of March 31, 2023 Funded Non-Funded Total (In millions) Borrower 1 Rs.  284,002.5 Rs.  —  Rs.  284,002.5 Borrower 2 220,901.6 1,200.0 222,101.6 Borrower 3 205,801.0 —  205,801.0 Borrower 4 80,344.5 112,144.7 192,489.2 Borrower 5 185,299.0 —  185,299.0 Borrower 6 154,296.7 21,764.8 176,061.5 Borrower 7 155,565.7 60.0 155,625.7 Borrower 8 139,808.3 —  139,808.3 Borrower 9 121,560.0 6,030.3 127,590.3 Borrower 10 112,479.0 15,070.0 127,549.0 As of March 31, 2024 Funded Non-Funded Total Total (In millions) Borrower 1 Rs.  301,241.8 Rs.  —  Rs.  301,241.8 US$  3,614.6 Borrower 2 276,973.5 1,200.0 278,173.5 3,337.8 Borrower 3 220,801.0 —  220,801.0 2,649.4 Borrower 4 214,755.0 42.5 214,797.5 2,577.4 Borrower 5 212,970.4 —  212,970.4 2,555.4 Borrower 6 187,963.3 200.0 188,163.3 2,257.8 Borrower 7 175,000.0 28.1 175,028.1 2,100.2 Borrower 8 163,105.7 5,893.4 168,999.1 2,027.8 Borrower 9 47,933.7 112,605.5 160,539.2 1,926.3 Borrower 10 145,250.0 21.0 145,271.0 1,743.1

Property and equipment (Tables)

Property and equipment (Tables)	12 Months Ended
	Mar. 31, 2024
Property, Plant and Equipment	Property and equipment by asset category As of March 31, 2023 2024 2024 (In millions) Land and premises Rs. 25,501.3 Rs.  64,357.6 US$  772.2 Software and systems 56,092.8 73,561.3 882.7 Equipment and furniture 132,553.5 172,031.8 2,064.2 Property and equipment, at cost 214,147.6 309,950.7 3,719.1 Less: Accumulated depreciation 126,577.9 162,920.3 1,954.9 Property and equipment, net Rs. 87,569.7 Rs.  147,030.4 US$  1,764.2

Goodwill and Intangible assets

Goodwill and Intangible assets (Tables)	12 Months Ended
	Mar. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
Carrying Amount of Goodwill	The following table represents the changes in the carrying amount of goodwill reported in the consolidated balance sheets for the year ended March 31, 2023 and March 31, 2024: As of March 31, 2024 Retail Banking Wholesale Treasury Insurance Others Total Total (In millions) Balance as at March 31, 2022 Rs.74,937.9 Rs.—  Rs.—  Rs.   —  Rs.    —  Rs.74,937.9 US$ 899.3 Balance as at March 31, 2023 74,937.9 —  —  —  —  74,937.9 899.3 Goodwill on acquisition during the year 368,079.6 71,617.3 —  959,080.0 229,371.6 1,628,148.5 19,536.2 Less: Goodwill Derecognised on disposal during the year —  —  —  —  73,576.1 .73,576.1 882.9 Balance at March 31, 2024 Rs.443,017.5 Rs.71,617.3 Rs.—  Rs.959,080.0 Rs.155,795.5 Rs.1,629,510.3 US$ 19,552.6
Intangible Assets, Net	Intangible assets, net, consists of the following: As of, July 1, 2023 March 31, 2024 March 31, 2024 (Rs. in millions) Brand Rs.  750,758.2 Rs.  742,230.7 US$  8,906.1 Investment management contract 369,785.6 369,785.6 4,437.1 Value of business acquired 221,738.5 221,738.5 2,660.6 Distribution network 59,543.2 50,570.8 606.9 Customer Relationship 29,874.9 29,874.9 358.4 Transferable Development Rights 3,117.7 3,117.7 37.4 Intangible Assets Rs. 1,434,818.1 Rs. 1,417,318.2 US$  17,006.5 Less: Accumulated amortization — 21,201.0 254.4 Total intangible assets, net Rs. 1,434,818.1 Rs. 1,396,117.2 US$  16,752.1 (*) All the above intangible assets excluding Brand and Investment Management Contract are subject to amortization. Further, intangible assets include Brand amounting to Rs. 8,527.5 million (US $ 102.3 million million) pertaining to HDFC Credila Financial Services Limited which is classified as held for sale as on date of acquisition. These have been derecognized following the divestment of stake on March 19, 2024.
Future Amortization of Finite Lived Intangible Assets	At March 31, 2024, the expected future amortization of finite-lived intangible assets is as follows: As of March 31, 2024 (in millions) Fiscal year ending March 31: 2025 Rs.  21,827.1 US$  261.9 2026 19,843.8 238.1 2027 18,138.2 217.6 2028 16,298.0 195.6 2029 14,661.8 175.9 Thereafter  193,332.0  2,319.8

Other assets (Tables)

Other assets (Tables)	12 Months Ended
	Mar. 31, 2024
Other Assets Disclosure	Other assets include the following: As of March 31, 2023 2024 2024 (In millions) Security deposits for leased property Rs. 6,461.8 Rs. 9,678.4 US$ 116.1 Sundry accounts receivable 84,217.8 129,187.8 1,550.1 Advance tax (net of provision for taxes) 52,006.4 173,281.9 2,079.2 Advances 14,724.3 51,036.8 612.4 Prepaid expenses 4,757.4 9,484.0 113.8 Deposits/Margins paid 14,959.0 48,100.4 577.2 Derivatives (refer to note 2 5 121,749.4 109,038.5 1,308.4 Placements with financial institutions 970,063.2 1,330,263.5 15,961.9 Receivable on account of trade date 8,442.2 295.5 3.5 ROU assets 89,989.3 121,302.5 1,455.5 Others (*) 129,380.8 546,542.0 6,558.0 Total Rs. 1,496,751.6 Rs. 2,528,211.3 US$ 30,336.1 ( ) Others include equity securities and affiliates with carrying value amounting to Rs. 22,103.4 million and Rs. 317,593.5 million as of March 31, 2023 and March 31, 2024, respectively. Equity securities include non-marketable equity securities carried at cost of Rs. 2,640.8 million and Rs. 14,646.7 million as of March 31, 2023 and March 31, 2024, respectively. Unrealized gain/(loss) recognized in non-interest revenue–other, net amount to Rs. 7,160.1 million and Rs. 11,759.4 million for the fiscal years ended March 31, 2023 and March 31, 2024, respectively. Further, Others also includes reinsurance assets amounting to Rs. 105,661.6 millio n

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Mar. 31, 2024
Deposit Liabilities Table Disclosures	Deposits include demand deposits, which are non-interest-bearing, and As of March 31, 2023 2024 2024 (In millions) Interest-bearing: Savings deposits Rs. 5,624,911.4 Rs. 5,987,449.1 US$ 71,843.6 Time deposits 10,472,547.9 14,700,957.1 176,397.4 Total interest-bearing deposits 16,097,459.3 20,688,406.2 248,241.0 Non-interest-bearing deposits 2,729,176.3 3,079,829.4 36,955.0 Total Rs. 18,826,635.6 Rs. 23,768,235.6 US$ 285,196.0
Time Deposits By Maturity	As of March 31, 2024, the scheduled maturities for total time deposits were as follows: As of March 31, 2024 (In millions) Due to mature in the fiscal year ending March 31: 2025 Rs. 10,598,905.6 US$ 127,176.7 2026 2,030,231.8 24,360.8 2027 972,634.2 11,670.7 2028 495,929.0 5,950.7 2029 365,318.4 4,383.5 Thereafter 237,938.1 2,855.0 Total Rs. 14,700,957.1 US$ 176,397.4

Short-term borrowings (Tables)

Short-term borrowings (Tables)	12 Months Ended
	Mar. 31, 2024
Short-Term Borrowings	Short-term borrowings mainly comprised of money market borrowings which are unsecured and are utilized by the Bank for its operations. Short-term borrowings as of March 31, 2023 and March 31, 2024 comprised the following: As of March 31, 2023 2024 2024 (In millions) Borrowed in the call market Rs. 14,359.5 Rs. 50,356.7 US$ 604.2 Term borrowings from institutions/banks 735,131.5 1,028,262.6 12,338.2 Foreign currency borrowings 320,695.0 200,685.2 2,408.0 Bills rediscounted 19,711.5 34,432.6 413.2 Total Rs. 1,089,897.5 Rs. 1,313,737.1 US$ 15,763.6 Total borrowings outstanding: Maximum amount outstanding Rs. 1,154,282.6 Rs. 2,415,549.7 US$ 28,984.3 Average amount outstanding Rs. 870,879.3 Rs. 1,416,168.6 US$ 16,992.7 Weighted average interest rate 4.0 % 6.9 % 6.9 %

Long-term debt (Tables)

Long-term debt (Tables)	12 Months Ended
	Mar. 31, 2024
Schedule of Long-term Debt Instruments	The below table presents the balance of long-term debt as of March 31, 2023 and March 31, 2024 and the related contractual rates and maturity dates: As of March 31, 2023 March 31, 2024 Maturity / Stated interest rates Total Maturity / Stated interest rates Total Total (In millions) Subordinated debt Subordinated debt (other than perpetual debt) 2024-2033 7.35% to 10.20% Rs. 248,983.8 2025-2034 6.67% to 9.7% Rs. 276,600.6 US$ 3,318.9 Perpetual debt — (1) 2024-2030 7.55% to 9.40% 43,850.5 2029-2038 7.55% to 9.4% 47,290.8 567.4 Perpetual debt — (2) 2027 3.70% 81,724.6 2037 3.70% 83,090.7 997.0 Others ( ) Variable rate — (1) 2024-2026 1.40% to 4.80% 76,405.9 2026-2029 6.10% to 6.51% 479,577.3 5,754.5 Variable rate — (2) 2024-2029 4.50% to 9.44% 148,813.9 2025-2030 6.21% to 9.0% 1,235,079.0 14,819.8 Fixed rate — (1) 2024-2030 2.80% to 9.81% 1,374,137.4 2025-2034 2.80% to 9.60% 4,313,107.4 51,753.2 Fixed rate — (2) 2024 2.58% 80,520.3 2025-2029 5.18% to 8.19% 214,026.2 2,568.1 Total Rs. 2,054,436.4 Rs. 6,648,772.0 US$ 79,778.9 ( ) Variable rate — (1), Perpetual debt — (2) and Fixed rate — (2) represent foreign currency debt. Variable rate debt is typically indexed to LIBOR, SOFR, T-bill rates, Marginal cost of funds based lending rates (“MCLR”), among others.
Maturities of Long-Term Debt Disclosures	The scheduled maturities of long-term debt are set out below: As of March 31, 2024 (In millions) Due in the fiscal year ending March 31: 2025 Rs. 706,824.8 US$ 8,481.2 2026 1,602,175.8 19,224.6 2027 1,359,351.1 16,311.0 2028 284,462.3 3,413.3 2029 596,057.0 7,152.1 Thereafter 1,969,519.5 23,632.3 Total (1) Rs. 6,518,390.5 US$ 78,214.5 (1) The scheduled maturities of long-term debt do not include perpetual bonds of Rs. 130,381.5 million (net of debt issuance cost).
Long-term Debt
Schedule of Long-term Debt Instruments	Long-term debt as of March 31, 2023 and March 31, 2024 was comprised of the following: As of March 31, 2023 2024 2024 (In millions) Subordinated debt Rs. 375,060.0 Rs. 407,531.3 US$ 4,890.0 Others ( ) 1,681,587.2 6,244,131.6 74,923.6 Debt issuance cost (2,210.8 ) (2,890.9 ) (34.7 ) Total Rs. 2,054,436.4 Rs. 6,648,772.0 US$ 79,778.9 ( ) Includes securities sold under repurchase agreements amounting to Rs. 90,200.0 million with a stated interest rate of 4.2% per annum for fiscal year ended March 31, 2023 and nil for the fiscal year ended March 31, 2024, under RBI long-term repo operation with a three-year maturity period. Increase in outstanding balance of Long-term debt – other as of March 31, 2024 is essentially on account of the Transaction (Refer note 3).

Accrued expenses and other li_2

Accrued expenses and other liabilities (Tables)	12 Months Ended
	Mar. 31, 2024
Accrued Expenses and Other Liabilities	Accrued expenses and other liabilities include the amounts set forth below: As of March 31, 2023 2024 2024 (In millions) Bills payable Rs.  117,907.5 Rs.  139,454.3 US$  1,673.3 Remittances in transit 61,927.3 85,743.4 1,028.8 Accrued expenses 45,684.4 82,752.6 993.0 Accounts payable 206,920.4 292,846.0 3,513.9 Derivatives (-refer to note 2 5 98,783.5 109,409.9 1,312.8 Deferred tax —  288,154.4 3,457.6 Lease liability 97,658.9 131,043.0 1,572.4 Others 125,471.4 165,599.2 1,987.0 Total Rs.  754,353.4 Rs.  1,295,002.8 US$  15,538.8

Accumulated other comprehensi_2

Accumulated other comprehensive income (Tables)	12 Months Ended
	Mar. 31, 2024
Changes in Accumulated Other Comprehensive Income After Tax	The below table presents the changes in AOCI after income tax for the fiscal years ended March 31, 2023 and March 31, 2024. AFS debt securities Foreign currency Total (In millions) Balance, March 31, 2022 Rs.  (21,063.4 ) Rs.  3,270.9 Rs.  (17,792.5 ) Net unrealized gain/(loss) arising during the period (52,522.8 ) 3,378.5 (49,144.3 ) Amounts reclassified to income (1,336.9 ) —  (1,336.9 ) Balance, March 31, 2023 Rs.  (74,923.1 ) Rs.  6,649.4 Rs.  (68,273.7 ) AFS debt securities Foreign currency Long-Duration Total (In millions) Balance, March 31, 2023 Rs.  (74,923.1 ) Rs.  6,649.4 Rs.  —  Rs.  (68,273.7 ) Net unrealized gain/ (loss) arising during the period 78,036.1 810.3 —  78,846.4 Amounts reclassified to income 4,856.3 —  —  4,856.3 Long-duration insurance contract discount rate change —  —  (34,112.6 ) (34,112.6 ) Transferred to undistributed policyholders earnings account — —  3,391.4 3,391.4 Net change  7,969.3  7,459.7 (30,721.2 )  (15,292.2 ) Less: Other comprehensive income attributable to shareholders of noncontrolling interest  15,474.5  17.9  (15,244.2 )  248.2 Balance, March 31, 2024 Rs . (7,505.2 ) Rs. 7,441.8 Rs. (15,477.0 ) Rs. (15,540.4 ) Balance, March 31, 2024 US$  (90.1 ) US$  89.3 US$ (185.7 ) US$ (186.5 )
Reclassification Out of Accumulated Other Comprehensive Income (OCI) by Income line Item and the Related Tax Effect	The below table presents the reclassification out of AOCI by income line item and the related income tax effect for the fiscal years ended March 31, 2023 and March 31, 2024. As of March 31, 2023 2024 2024 (In millions) AFS debt securities: Realized (gain)/loss on sales of AFS debt securities, net Rs. (1,857.5 ) Rs. 6,602.9 US$ 79.3 Allowance on AFS debt securities 70.9 (70.9 ) (0.9 ) Total before income tax Rs. (1,786.6 ) Rs. 6,532.0 US$ 78.4 Income tax 449.7 (1,675.7 ) (20.1 ) Net of income tax Rs. (1,336.9 ) Rs. 4,856.3 US$ 58.3

Insurance services (Tables)

Insurance services (Tables)	12 Months Ended
	Mar. 31, 2024
Separate Accounts Disclosure [Abstract]
Summary of Balances of and Changes in Separate Account Liabilities	The balances of and changes in separate account liabilities were as follows: As of March 31, 2024 Particulars Unit-Linked Life Unit-Linked Group Linked Total Total (In millions) Balance, July 1, 2023 Rs. 709,215.4 Rs.  55,986.3 Rs. 92,327.0 Rs.  857,528.7 US$  10,289.5 Premiums and deposits 97,196.3 3,556.3 16,103.6 116,856.2 1,402.1 Policy Charges (12,754.4 ) (594.4 ) (762.9 ) (14,111.7 ) (169.3 ) Surrenders and withdrawals (104,102.3 ) (8,432.7 ) (6,882.6 ) (119,417.6 ) (1,432.9 ) Benefit Payments (37,926.8 ) (2,504.9 ) —  (40,431.7 ) (485.1 ) Investment Performance 141,987.6 7,709.9 8,454.5 158,152.0 1,897.7 Other Charges (2,904.3 ) (124.2 ) (131.1 ) (3,159.6 ) (37.9 ) Balance, March 31, 2024 Rs.  790,711.5 Rs. 55,596.3 Rs.  109,108.5 Rs.  955,416.3 US$ 11,464.1
Summary of Bank's Aggregate Fair Value of Assets, by Major Investment Asset Category, Supporting Separate Accounts Liabilities	The Bank’s aggregate fair value of assets, by major investment asset category, supporting separate accounts liabilities was as follows: As of March 31, 2024 Particulars Unit-Linked Life Unit-Linked Group Linked Total Total (In millions) Government of India securities Rs. 39,549.7 Rs. 7,114.1 Rs. 46,433.5 Rs. 93,097.3 US$ 1,117.0 Other corporate/financial institution securities 74,622.2 8,253.7 34,739.2 117,615.1 1,411.3 Total debt securities 114,171.9 15,367.8 81,172.7 210,712.4 2,528.3 Other securities (including mutual fund units) 671,814.6 39,955.9 25,036.5 736,807.0 8,841.0 Other net current assets 4,725.0 272.6 2,899.3 7,896.9 94.8 Total Rs. 790,711.5 Rs. 55,596.3 Rs. 109,108.5 Rs. 955,416.3 US$ 11,464.1
Summary of Bank's Liabilities on Policies	The Bank’s Liabilities on policies in force on the consolidated balance sheets was as follows: Description As of March 31, 2024 (in millions) Liability for Future Policy Benefits Rs.  1,671,384.1 US$  20,055.0 Policyholder Account Balances 85,430.1 1,025.1 Other Policy Liabilities 7,164.9 86.0 Total 1,763,979.1 21,166.1
Summary of Bank's Liability for Future Policy Benefits on the Consolidated Balance Sheets	The Bank’s liability for future policy benefits on the consolidated balance sheets was as follows: Description As of March 31, 2024 (in millions) Non Par Protection Rs.  166,649.2 US$ 1,999.6 Non Par Riders 207.0 2.5 Non Par Savings 551,186.3 6,613.7 Non Par Pension 17,609.5 211.3 Individual Annuity 255,858.7 3,070.1 Individual health 410.4 4.9 Par life 561,076.4 6,732.4 Par Pension 16,294.1 195.5 Group Non Par Life 102,092.5 1,225.0 Total Rs.  1,671,384.1 US$  20,055.0
Summary of Information About the Liability for Future Policy Benefits	The following information about the liability for future policy benefits includes disaggregated rollforwards of expected future net premiums and expected future benefits. The products grouped within these rollforwards were selected based upon common characteristics and valuations using similar inputs, judgments, assumptions and methodologies within a particular line of business. All amounts presented in the rollforwards and accompanying financial information do not include a reduction for amounts ceded to reinsurers, except with respect to ending net liability for future policy benefits balances where applicable. Year Ended March 31, 2024 Non Par Non Par Non Par Non Par Individual Annuity Individual Par Life Par Group Non Par Life Total Total (Rs. In million, other than weighted average) (US$ in million) Present value of Expected Net Premium Balance at July 01, at current 40,899.8 429.3 251,372.4 97.1 2,472.3 791.6 44.0 —  —  296,106.5 3,553.0 Balance at July 01, at original 40,899.8 429.3 251,372.4 97.1 2,472.3 791.6 44.0 —  —  296,106.5 3,553.0 Effect of changes in cash flow assumptions 4,429.1 —  (42.8 ) 0.3 6.4 —  619.0 —  —  5,012.0 60.1 Effect of actuarial variances (1,277.3 ) 15.6 2,649.0 0.8 395.8 43.6 2,640.7 (0.7 ) 9,298.2 13,765.7 165.2 Adjusted Balance 44,051.6 444.9 253,978.6 98.2 2,874.5 835.2 3,303.7 (0.7 ) 9,298.2 314,884.2 3,778.3 Issuances 18,075.3 891.5 93,550.6 1,918.4 36,417.8 33.8 27,308.5 2,081.3 16,873.7 197,150.9 2,365.6 Interest accrual 3,343.2 69.4 17,926.3 98.4 1,272.8 44.5 1,539.5 102.3 436.2 24,832.6 298.0 Net premium collected (7,081.9 ) (256.7 ) (72,133.2 ) (537.5 ) (32,412.7 ) (171.1 ) (6,418.9 ) (562.6 ) (26,601.3 ) (146,175.9 ) (1,754.0 ) Balance at March 31, at original discount rate 58,388.2 1,149.1 293,322.3 1,577.5 8,152.4 742.4 25,732.8 1,620.3 6.8 390,691.8 4,687.9 Effect of changes in discount 174.0 (2.6 ) (1,182.0 ) (6.3 ) 4.3 (1.8 ) (97.2 ) (7.0 ) 0.1 (1,118.5 ) (13.4 ) Balance at March 31, at current discount rate at balance sheet date 58,562.2 1,146.5 292,140.3 1,571.2 8,156.7 740.6 25,635.6 1,613.3 6.9 389,573.3 4,674.5 Present value of Expected Future Policy Benefits Balance at July 01, at current 180,285.0 413.9 658,883.0 13,185.7 212,888.9 1,088.2 504,494.2 16,744.8 66,264.0 1,654,247.7 19,849.4 Balance at July 01, at original 180,285.0 413.9 658,883.0 13,185.7 212,888.9 1,088.2 504,494.2 16,744.8 66,264.0 1,654,247.7 19,849.4 Effect of changes in cash flow assumptions 7,429.2 —  3,429.0 35.1 75.7 —  (1,377.7 ) 326.1 1,498.4 11,415.8 137.0 Effect of actuarial variances (1,526.0 ) 15.9 2,653.6 (187.0 ) (136.9 ) 43.7 2,250.6 539.3 7,379.6 11,032.8 132.4 Adjusted Balance 186,188.2 429.8 664,965.6 13,033.8 212,827.7 1,131.9 505,367.1 17,610.2 75,142.0 1,676,696.3 20,118.8 Issuances 18,051.0 882.1 93,520.0 1,918.4 36,417.8 33.8 27,264.0 2,080.8 16,873.7 197,041.6 2,364.3 Interest accrual 11,529.5 73.3 43,134.7 798.0 14,141.1 63.1 29,361.4 1,063.9 4,700.4 104,865.4 1,258.3 Benefits Payments (5,294.9 ) (81.5 ) (8,918.6 ) (2,530.3 ) (12,654.0 ) (137.5 ) (45,730.7 ) (2,959.8 ) (20,373.2 ) (98,680.5 ) (1,184.1 ) Balance at March 31, at original discount rate 210,473.8 1,303.7 792,701.7 13,219.9 250,732.6 1,091.3 516,261.8 17,795.1 76,342.9 1,879,922.8 22,557.3 Effect of changes in discount 6,215.7 4.7 17,990.2 (28.9 ) 6,399.5 0.1 3,658.3 (37.5 ) (188.4 ) 34,013.7 408.1 Balance at March 31, at current discount rate at balance sheet date 216,689.5 1,308.4 810,691.9 13,191.0 257,132.1 1,091.4 519,920.1 17,757.6 76,154.5 1,913,936.5 22,965.4 Present value of expected claims expenses 242.0 26.8 142.2 2.8 32.9 0.1 547.5 4.3 —  998.6 12.0 Net liability for future policy benefits 158,369.3 188.7 518,693.8 11,622.6 249,008.3 350.9 494,832.0 16,148.6 76,147.6 1,525,361.8 18,302.9 Deferred Profit Liability 6,568.5 18.3 29,891.5 175.2 6,543.2 —  63,225.0 95.9 6,602.0 113,119.6 1,357.3 Other global reserves 1,711.4 —  2,601.0 5,811.7 307.2 59.5 3,019.4 49.6 19,342.9 32,902.7 394.8 Total liability for future policy 166,649.2 207.0 551,186.3 17,609.5 255,858.7 410.4 561,076.4 16,294.1 102,092.5 1,671,384.1 20,055.0 Less: Reinsurance recoverables 83,420.6 28.0 (17.4 ) —  —  125.2 18,249.9 —  3,786.3 105,592.6 1,267.0 Net liability for future policy benefits, net of reinsurance 83,228.6 179.0 551,203.7 17,609.5 255,858.7 285.2 542,826.5 16,294.1 98,306.2 1,565,791.5 18,788.0 Undiscounted- Expected future 1,120,561.7 2,580.3 2,875,101.5 19,433.2 864,912.6 1,758.2 1,302,045.2 25,927.9 96,029.6 6,308,350.2 75,694.1 Discounted- Expected future benefit payments (at current discount rate 216,689.5 1,308.4 810,691.9 13,191.0 257,132.1 1,091.4 519,920.1 17,757.6 76,154.5 1,913,936.5 22,965.4 Undiscounted-Expected future gross premiums 296,828.1 3,359.9 611,779.3 3,502.2 21,253.0 1,769.6 507,662.9 7,523.1 220.7 1,453,898.8 17,445.4 Discounted-Expected future gross premiums 172,175.3 2,461.1 489,752.0 2,869.1 18,427.5 1,289.9 409,535.4 6,057.0 124.3 1,102,691.6 13,231.2 Weighted-average duration of the liability (in years) 13.50 10.57 10.39 4.25 10.30 5.96 8.39 4.06 3.23 Weighted-average interest accretion (original locked-in) rate 7.69 % 7.69 % 7.69 % 7.69 % 7.69 % 7.69 % 7.69 % 7.69 % 7.69 % Weighted-average current discount rate at balance sheet date 7.40 % 7.40 % 7.42 % 7.66 % 7.42 % 7.50 % 7.48 % 7.66 % 7.68 %
Summary of Bank's Gross Premiums or Assessments and Interest Expense Recognised	The Bank’s gross premiums and interest accretion recognised in the Traditional and Limited-Payment Contracts: As of March 31, 2024 (In millions) Gross premiums Interest accretion Non Par Protection Rs. 120,828.1 Rs. 8,357.9 Non Par Riders — 4.4 Non Par Savings 23,560.0 25,621.0 Non Par Pension 1,020.9 704.0 Individual Annuity 39,984.9 12,926.3 Individual health 419.0 17.6 Par life 111,036.4 29,795.5 Par Pension 1,846.5 962.1 Group Non Par Life 71,156.2 4,371.4 Total Rs. 369,852.0 Rs. 82,760.2 Total US$ 4,437.9 US$ 993.0
Summary of the Bank's Policyholder Account Balances on the Consolidated Balance	Description As of March 31, 2024 (in millions) Group traditional life Rs. 23,718.6 US$ 284.6 Group traditional pension 8,824.2 105.9 Group variable life 22,764.1 273.1 Group variable pension 19,200.9 230.4 Individual VIP pension 9,613.9 115.4 Statutory reserves 1,308.4 15.7 Total 85,430.1 1,025.1
Summary of Bank's Primarily two types of Reinsurance Treaties, Auto and Facultative Reinsurance with Third Parties	The Bank has primarily two types of reinsurance treaties, auto and facultative reinsurance. The primary reason is to diversify the pool of risk covered by the insurance company, and to limit the liability along with ensuring solvency of the Bank. We remain liable to our policyholders regardless of whether our reinsurers meet their obligations under the reinsurance contracts, and as such, we regularly evaluate the financial condition of our reinsurers and monitor concentration of our credit risk. The effect of all reinsurance agreements on the consolidated statements of financial income As of March 31, 2024 Liabilities on policies in force: (In millions) Direct Rs 1,763,024.4 US$ 21,154.6 Assumed 954.7 11.5 Total liabilities on policies in force 1,763,979.1 21,166.1 Ceded (*) 105,661.6 1,267.8 Net liabilities on policies in force 1,658,317.5 19,898.3 (*) Reinsurance asset reported within other asset
Summary of Effect of Reinsurance	The effects of reinsurance on the consolidated statements of income were as follows: As of March 31, 2024 Premium and other operating income from insurance business: (In millions) Direct Rs.  389,925.5 US$  4,678.7 Assumed 1,588.5 19.1 Ceded (9,634.5 ) (115.6 ) Total 381,879.5 4,582.2 As of March 31, 2024 Claims and benefits paid pertaining to insurance business: (In millions) Direct Rs.  383,194.5 US$  4,597.9 Assumed 1,029.4 12.4 Ceded (2,258.1 ) (27.1 ) Total 381,965.8 4,583.2
Summary of Information Regarding Total DAC	Information regarding total DAC was as follows: As of March 31, 2024 (In millions) Opening balance July 1, 2024 Rs.  —  US$  —  Capitalizations 64,390.0 772.6 Amortization (2,971.3 ) (35.7 ) Experience Adjustment (886.8 ) (10.6 ) Balance at March 31, 2024 Rs.  60,531.9 US$  726.3
Summary of Information Regarding Movement of Total VOBA Contracts	Information regarding movement of total VOBA contracts from July 1, 2023 (acquisition date) to March 31, 2024 was as follows: As of March 31, 2024 (In millions) Balance at July 1 2023 Rs. 221,738.5 US$ 2,660.6 Amortization (16,707.7 ) (200.5 ) Experience Adjustment (635.1 ) (7.6 ) Balance at March 31 2024 Rs. 204,395.7 US$ 2,452.5
Summary of Information Regarding the Estimated Future Amortisation of VOBA Intangibles Over the Next Five Years	Information regarding the estimated future amortization of VOBA intangibles over the next five years is as follows: As of March 31, 2024 Year (In millions) 2025 Rs. 16,705.3 US$ 200.4 2026 14,721.9 176.6 2027 13,016.3 156.2 2028 11,176.1 134.1 2029 9,539.9 114.5

Non-interest revenue (Tables)

Non-interest revenue (Tables)	12 Months Ended
	Mar. 31, 2024
Summary of Disaggregation of Revenue	The table below presents the fees and commissions disaggregated Fiscal year ended March 31, 2022 2023 2024 2024 (In millions) Deposit related fees Rs.  37,415.4 Rs.  40,749.9 Rs.  45,178.6 US$  542.1 Lending related fees 40,532.5 48,878.2 55,501.7 666.0 Third-party products related fees 44,216.1 54,548.9 43,049.3 516.6 Payments and cards business fees 56,170.2 72,969.0 92,568.5 1,110.7 Investment Management Fee —  —  20,819.1 249.8 Others 24,645.3 22,457.7 23,848.7 286.1 Fees and commissions Rs.  202,979.5 Rs.  239,603.7 Rs.  280,965.9 US$  3,371.3
Summary of Disaggregation of Revenue from Business Segments	The table below presents the fees and commission disaggregated by segment for the fiscal years ended March 31, 2022, March 31, 2023 and March 31, 2024. Fiscal year ended March 31, 2022 2023 2024 2024 (In millions) Retail Banking Rs.  182,464.1 Rs.  215,252.5 Rs.  229,890.7 US$  2,758.5 Wholesale Banking 19,802.0 23,619.5 27,844.8 334.1 Treasury Services 713.4 731.7 414.9 5.0 Insurance services —  —  —  —  Others —  —  22,815.5 273.7 Fees and commissions Rs. 202,979.5 Rs. 239,603.7 Rs. 280,965.9 US$ 3,371.3

Income taxes (Tables)

Income taxes (Tables)	12 Months Ended
	Mar. 31, 2024
Income Tax Expense	Income tax expense is comprised of the following: Fiscal year ended March 31, 2022 2023 2024 2024 (In millions) Current tax expense Rs.  142,446.5 Rs.  156,782.9 Rs.  140,308.9 US$  1,683.6 Deferred tax expense/ (benefit) (9,887.3 ) 12,280.9 (57,133.2 ) (685.5 ) Interest on income tax refund —  (2,946.4 ) (5,348.6 ) (64.2 ) Income tax expense Rs. 132,559.2 Rs. 166,117.4 Rs. 77,827.1 US$ 933.9
Reconciliation of Income Taxes at Indian Statutory Income Tax Rate to Income Tax Expense as Reported	Taxes at the Indian statutory income tax rate, the income tax rate of the Bank’s country of domicile, to income tax expense as reported: Fiscal year ended March 31, 2022 2023 2024 2024 (In millions) Income before income tax expense Rs. 519,162.2 Rs. 662,381.8 Rs. 705,459.0 US$ 8,465.0 Statutory income tax rate 25.17 % 25.17 % 25.17 % 25.17 % Expected income tax expense 130,662.7 166,708.3 177,549.9 2,130.4 Adjustments to reconcile expected income tax to actual tax expense Interest on income tax refund —  (2,204.9 ) (4,125.0 ) (49.5 ) Stock-based compensation 3,493.1 1,645.9 (10,645.6 ) (127.7 ) Income subject to rates other than the statutory income tax rate (2,347.6 ) (6.8 ) (1,262.0 ) (15.1 ) Special reserve —  —  (5,143.2 ) (61.7 ) Unrecognised tax benefit of earlier years including consequential tax credit pursuant to favourable orders received recognised (80,874.4 ) (970.4 ) Other, net 751.0 (25.1 ) 2,327.4 27.9 Income tax expense Rs. 132,559.2 Rs. 166,117.4 Rs.  77,827.1 US$  933.9
Tax Effects of Significant Temporary Differences	The tax effects of significant temporary differences are as follows: As of March 31, 2023 2024 2024 (In millions) Tax effect of: Deductible temporary differences: Allowance for credit losses Rs. 74,143.7 Rs. 43,093.6 US$ 517.1 Investments AFS debt securities 25,117.0 7,704.7 92.4 Lease liabilities 24,578.8 32,034.7 384.4 Employee benefits 709.9 4,632.2 55.6 Borrowings 1.4 10,714.9 128.6 Stock based compensation —  20,166.2 241.9 Others 5,458.1 320.1 3.9 Deferred tax asset 130,008.9 118,666.4 1,423.9 Taxable temporary differences: ROU Asset 24,578.8 32,009.3 384.1 Loan origination cost 7,070.1 7,541.1 90.5 Intangible assets — 313,272.2 3,759.0 Investments, others 8,304.6 53,998.2 647.9 Deferred tax liability 39,953.5 406,820.8 4,881.5 Net deferred tax asset/ (liability) Rs. 90,055.4 Rs.  (288,154.4 ) US$  (3,457.6 )
Reconciliation of Beginning and Ending Balance of Unrecognized Tax Benefits	A reconciliation of the beginning and ending balance of unrecognized tax benefits is as follows: Fiscal year ended March 31, 2022 2023 2024 2024 (In millions) Opening balance Rs. 43,048.0 Rs. 46,774.3 Rs. 48,792.1 US$ 585.5 Increase related to acquisition of eHDFC —  —  52,980.5 635.7 Decrease related to prior year tax positions (1,985.0 ) —  (80,874.4 ) (970.4 ) Increase related to current year tax positions 5,711.3 2,017.8 1,144.1 13.7 Closing balance Rs. 46,774.3 Rs.  48,792.1 Rs.  22,042.3 US$  264.5

Stock (Tables)

Stock (Tables)	12 Months Ended
	Mar. 31, 2024
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions	The fair value of employee stock option schemes has been estimated on the dates of each grant using a binomial option pricing model with the following assumptions: Fiscal years ended March 31, 2022 2023 2024 Dividend yield 0.43%-0.46% 0.51%-0.97% 0.67%-0.71% Expected volatility 21.71%-31.79% 21.97%-33.50% 21.91%-27.42% Risk-free interest rate 4.99%-6.43% 6.14%-7.59% 7.21%-7.55% Expected term (in years) 2.59-5.36 2.53-7.25 4.50-7.25
Schedule of Share-based Compensation, Stock Options, Activity	Activity in the options available to be granted under the employee stock option scheme Number of options available to be granted 2022 2023 2024 Options available to be granted, beginning of period 104,694,170 81,992,420 54,214,165 Equity shares allocated for grant under the plan —  —  —  Options granted (25,628,600 ) (30,480,145 ) (24,384,690 ) Forfeited/lapsed 2,926,850 2,701,890 2,662,442 Options available to be granted, end of period 81,992,420 54,214,165 32,491,917 Activity in the options outstanding under the employee stock option scheme is as Fiscal years ended March 31, 2022 2023 2024 Options Weighted Options Weighted Options Weighted Options outstanding, beginning of period 168,168,760 Rs. 1,063.79 158,106,016 Rs. 1,175.65 151,682,461 Rs. 1,264.86 Addition on account of eHDFC merger — — — — 48,559,681 1,124.77 Granted 25,628,600 1,427.29 30,480,145 1,425.69 24,384,690 1,611.84 Exercised (32,764,494 ) 796.52 (34,201,810 ) 998.73 (46,304,966 ) 1,133.72 Forfeited (2,639,100 ) 1,231.84 (2,175,700 ) 1,274.53 (2,198,002 ) 1,363.80 Lapsed (287,750 ) 870.34 (526,190 ) 1,033.65 (464,440 ) 1,151.88 Options outstanding, end of period 158,106,016 Rs. 1,175.65 151,682,461 Rs. 1,264.86 175,659,424 Rs. 1,307.93 Options exercisable, end of period 65,321,116 Rs. 1,036.49 65,124,916 Rs. 1,162.96 98,829,856 Rs. 1,201.65 Weighted average fair value of options granted during the year Rs. 415.12 Rs. 548.11 Rs. 607.28
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range	The following summarizes information about stock options outstanding as of March 31, 2024: As of March 31, 2024 Plan Range of exercise price Number of Weighted Weighted Plan E Rs. 1,636.9 (or US$ 19.64) 5,075,360.0 5.92 Rs. 1,636.9 Plan F Rs. 716.60 to Rs. 1,636.90 (or US$ 8.60 to US$ 19.64) 15,551,708.0 4.84 Rs. 1,458.3 Plan G Rs. 882.85 to Rs. 1,673.10 (or US$ 10.59 to US$ 20.08) 115,413,810.0 2.66 Rs. 1,333.8 eHDFC Rs. 160.79 to Rs. 1,535.27 (or US$ 1.93 to US$ 18.42) 39,618,546.0 3.48 Rs.  1,131.5
Schedule of Share Based Compensation By Share Based Award Restricted Stock Units Valuation Assumptions	The fair value of restricted stock units has been estimated on the dates of each grant using a binomial option pricing model with the following assumptions: Fiscal years ended March 31, 2023 2024 Dividend yield 0.47%-0.75% 0.65%-1.17% Expected volatility 23.68%-35.35% 21.32%-35.35% Risk-free interest rate 7.07%-7.57% 6.85%-7.18% Expected term (in years) 1.0- 4.0 1.0- 4.0
Schedule Of Movement In Restricted Stock Units	Activity in the RSUs outstanding under the various Employees’ Stock Incentive Master Scheme as of March 31, 2024: Number of RSUs available to be granted 2023 2024 RSUs available to be granted, beginning of period —  97,109,000 Equity shares allocated for grant under the scheme 100,000,000 —  RSUs granted (2,891,000 ) (9,354,224 ) Forfeited/lapsed —  206,800 RSUs available to be granted, end of the period 97,109,000 87,961,576
Schedule of Share-based Compensation, Restricted Stock Units, Activity	Activity in the RSUs outstanding under the various Employees’ Stock Incentive Master Scheme as Fiscal years ended March 31, 2023 2024 Units Weighted average Units Weighted average RSUs outstanding, beginning of period —  Rs. —  2,891,000 Rs. 1.0 Granted 2,891,000 1.00 9,354,224 1.0 Exercised —  —  (316,620 ) 1.0 Forfeited —  —  (203,500 ) 1.0 Lapsed —  (3,300 ) 1.0 RSUs outstanding, end of period 2,891,000 1.00 11,721,804 1.0 RSUs exercisable, end of period —  376,070 1.0 Weighted average fair value of RSUs granted during the year Rs. 1,382.34 Rs. 1,565.43
Schedule of Share-based Compensation, Shares Authorized under Restricted Stock Units Plans, by Exercise Price Range	The following summarizes information about RSUs outstanding as of March 31, 2024: As of March 31, 2024 Plan Range of exercise price Number of Weighted Weighted ESIS 2022 Rs. 1.00 (or US$ 0) 11,721,804 2.65 1.00

Retirement benefits (Tables)

Retirement benefits (Tables)	12 Months Ended
	Mar. 31, 2024
Schedule of Allocation of Plan Assets	Plan investment assets for gratuity funds and the pension fund measured at fair value by level and in total as of March 31, 2023 and March 31, 2024 are summarized in the table below. As of March 31, 2023 As of March 31, 2024 Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 (In millions) Funds managed by insurance company (1) Rs. —  Rs. —  Rs. 864.5 Rs. —  Rs. —  Rs. 859.1 Funds managed by insurance company (2) —  9,829.4 —  —  14,478.3 —  Funds managed by trust — Government securities —  60.8 —  —  1,792.6 —  — Debenture and bonds —  54.8 —  —  1,200.9 —  — Others 109.6 —  —  581.9 200.5 —  Total Rs.  109.6 Rs.  9,945.0 Rs.  864.5 Rs. 581.9 Rs. 17,672.3 Rs. 859.1 US$ 7.0 US$ 212.1 US$ 10.4
Schedule of Effect of Significant Unobservable Inputs, Changes in Plan Assets	The table below presents a reconciliation of all Plan investment assets measured at fair value using significant unobservable inputs (Level 3) during the fiscal years ended March 31, 2023 and March 31, 2024. Funds managed by Insurance 2023 2024 2024 (In millions) Particulars Opening balance Rs. 779.8 Rs. 864.5 US$ 10.4 On merger of eHDFC — 25.1 0.3 Realized interest credited to fund 54.8 64.0 0.8 Contribution during the period 148.6 70.9 0.9 Amount paid towards claim (118.7 ) (165.4 ) (2.0 ) Closing balance Rs. 864.5 Rs.  859.1 US$  10.4
Gratuity
Schedule of Defined Benefit Plans Disclosures	The following table sets out the funded status of the gratuity plan and the amounts recognized in the Bank’s consolidated financial statements as of March 31, 2023 and March 31, 2024: As of March 31, 2023 2024 2024 (In millions) Change in benefit obligations: Projected benefit obligation (“PBO”), beginning of the period Rs. 10,688.7 Rs. 11,491.6 US$ 137.9 On merger of eHDFC —  5,421.2 65.0 Service cost 1,398.6 1,968.8 23.6 Interest cost 773.4 981.3 11.8 Actuarial(gains)/ losses (252.4 ) (303.0 ) (3.6 ) Benefits paid (1,116.7 ) (1,968.0 ) (23.6 ) Projected benefit obligation, end of the period 11,491.6 17,591.9 211.1 Change in plan assets: Fair value of plan assets, beginning of the period 10,019.3 10,916.1 131.0 Fair value of plan assets - Addition on account of acquisition of HDFC Ltd 5,121.2 61.4 Expected return on plan assets 668.2 1,036.1 12.4 Actuarial gains/(losses) (390.0 ) 2,893.5 34.7 Actual return on plan assets 278.2 3,929.6 47.1 Employer contributions 1,735.3 717.9 8.6 Benefits paid (1,116.7 ) (1,733.0 ) (20.8 ) Fair value of plan assets, end of the period 10,916.1 18,951.8 227.3 Funded Status Rs. (575.5 ) Rs. 1,359.9 US$ 16.2
Schedule of Net Benefit Costs	Net gratuity cost for the years ended March 31, 2022, March 31, 2023 and March 31, 2024 comprised the following components: Fiscal years ended March 31, 2022 2023 2024 2024 (In millions) Service cost Rs. 1,268.0 Rs. 1,398.6 Rs. 1,968.8 US$ 23.6 Interest cost 631.2 773.4 981.3 11.8 Expected return on plan assets (574.1 ) (668.2 ) (1,036.1 ) (12.4 ) Actuarial (gains)/losses (497.7 ) 137.6 (3,196.5 ) (38.4 ) Net gratuity cost Rs. 827.4 Rs. 1,641.4 Rs. (1,282.5 ) US$  (15.4 )
Schedule of Assumptions Used	The assumptions used in accounting for the gratuity plan are set out below: Fiscal years ended March 31, 2022 2023 2024 (% per annum) Discount rate ( ) 5.1-7.3 5.1-7.9 7.2-8.3 Rate of increase in compensation levels of covered employees 6.0-11.0 6.0-11.0 3.0-15.0 Rate of return on plan assets 5.1-7.0 5.1-7.2 6.5-7.4 Mortality rates used are based on the published “Indian Assured Lives Mortality (2012-2014) Ultimate” table ( ) Weighted average assumptions used to determine both benefit obligations and net periodic benefit cost.
Schedule of Expected Benefit Payments	The following benefit payments, which includes benefits attributable to expected future service, as appropriate, are expected to be paid. Fiscal years ending March 31, Benefit payments In millions) 202 5 Rs. 2,261.8 202 6 1,718.4 202 7 1,575.0 202 8 1,497.5 202 9 1,384.2 20 30 4 6,572.2
Schedule of Allocation of Plan Assets	As of March 31, 2024, the plan assets as a percentage of the total funds were as follows: As of March 31, 2024 Funds managed ( ) Funds managed ( ) Funds Government securities 77.2 % 46.9 % 45.6 % Debenture and bonds 4.5 % 12.9 % 32.8 % Equity securities 10.3 % 39.2 % 15.6 % Other 8.0 % 1.0 % 6.0 % Total 100.0 % 100.0 % 100.0 % ( ) The data pertaining to plan investment assets measured at fair value by level and total at March 31, 2024 are provided separately.
Pension
Schedule of Defined Benefit Plans Disclosures	The following table sets out the funded status of the pension plan As of March 31, 2023 2024 2024 (In millions) Change in benefit obligations: Projected benefit obligation (“PBO”), beginning of the period Rs. 840.9 Rs. 1,018.0 US$ 12.2 Plan amendment (prior service cost) —  —  —  Service cost 18.5 16.0 0.2 Interest cost 57.3 76.4 0.9 Actuarial (gains)/losses 221.4 (24.6 ) (0.3 ) Benefits paid (120.1 ) (98.5 ) (1.2 ) Projected benefit obligation, end of the period 1018.0 987.3 11.8 Change in plan assets: Fair value of plan assets, beginning of the period 8.7 3.0 0.0 Expected return on plan assets 0.4 6.5 0.1 Actuarial gains/(losses) 2.2 8.8 0.1 Actual return on plan assets 2.6 15.3 0.2 Employer contributions 111.8 241.7 2.9 Benefits paid (120.1 ) (98.5 ) (1.2 ) Fair value of plan assets, end of the period 3.0 161.5 1.9 Funded Status Rs. (1,015.0 ) Rs. (825.8 ) US$ (9.9 )
Schedule of Net Benefit Costs	Net pension cost for the fiscal years ended March 31, 2022, March 31, 2023 and March 31, 2024 comprised the following components: As of March 31, 2022 2023 2024 2024 (In millions) Service cost Rs. 93.0 Rs. 18.5 Rs. 16.0 US$ 0.2 Interest cost 55.8 57.3 76.4 0.9 Expected return on plan assets (0.4 ) (0.4 ) (6.5 ) (0.1 ) Actuarial (gains)/losses 32.1 219.2 (33.4 ) (0.4 ) Net pension cost Rs. 180.5 Rs. 294.6 Rs. 52.5 US$ 0.6
Schedule of Assumptions Used	The assumptions used in accounting for the pension plan are set out below: Fiscal years ended March 31, 2022 2023 2024 (% per annum) Discount rate ( ) 7.3 7.9 7.7 Rate of increase in compensation levels of covered employees 7.0 10.0 7.0 Rate of return on plan assets 6.5 6.5 6.5 Mortality rates used are based on the published “Indian Assured Lives Mortality (2012-2014) Ultimate” table. ( ) Weighted average assumptions used to determine both benefit obligations
Schedule of Expected Benefit Payments	The following benefit payments, which include benefits attributable to expected future service, as appropriate, are expected to be paid. Fiscal years ending March 31, Benefit payments (In millions) 202 5 Rs. 94.9 202 6 72.1 202 7 80.3 202 8 81.8 202 9 76.8 20 30 4 756.9
Schedule of Allocation of Plan Assets	The weighted-average asset allocation of said plan assets for the pension benefits as of March 31, 2024 is as follows: Asset category Funds managed Government securities 89.6 % Debenture and bonds 10.4 % Other —  Total 100.0 %

Financial instruments (Tables)

Financial instruments (Tables)	12 Months Ended
	Mar. 31, 2024
Schedule of Derivative Instruments	The following table presents the aggregate notional principal amounts of the Bank’s outstanding forward exchange and other derivative contracts as of March 31, 2023 and March 31, 2024, together with As of March 31, 2023 Notional Gross Assets Gross Liabilities Net Fair Value (In millions) Interest rate derivatives Rs.  5,974,019.2 Rs.  41,148.2 Rs.  36,627.4 Rs.  4,520.8 Forward rate agreements 140,693.0 1,848.4 541.4 1,307.0 Currency options 257,641.1 1,402.4 1,578.3 (175.9 ) Currency swaps 372,114.3 21,753.7 7,213.4 14,540.3 Forward exchange contracts 9,052,221.4 55,596.7 52,823.0 2,773.7 Total Rs.  15,796,689.0 Rs.  121,749.4 Rs.  98,783.5 Rs.  22,965.9 As of March 31, 2024 Notional Gross Assets Gross Liabilities Net Fair Value Notional Net Fair Value (In millions) Interest rate derivatives Rs.  7,834,342.2 Rs.  53,970.3 Rs.  63,112.8 Rs.  (9,142.5 ) US$ 94,004.6 US$ (109.7 ) Forward rate agreements 592,414.5 10,071.3 4,514.9 5,556.4 7,108.4 66.7 Currency options 223,904.8 588.1 873.2 (285.1 ) 2,686.6 (3.4 ) Currency swaps 493,708.2 11,754.5 4,440.2 7,314.3 5,924.0 87.8 Forward exchange contracts 12,125,527.9 32,654.3 36,468.8 (3,814.5 ) 145,494.7 (45.8 ) Total Rs.  21,269,897.6 Rs.  109,038.5 Rs.  109,409.9 Rs.  (371.4) US$ 255,218.3 US$ (4.4 )
Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance	The following table summarizes certain information related to derivative amounts recognized in income: Non-interest revenue, net– 2022 2023 2024 2024 (In millions) Interest rate derivatives Rs.  3,207.7 Rs.  5,921.5 Rs.  1,762.6 US$ 21.2 Forward rate agreements 1,374.1 (2.0 ) 2,089.6 25.1 Currency options 167.3 1,200.3 194.0 2.3 Currency swaps (1,682.0 ) 1,609.1 10,242.9 122.9 Forward exchange contracts (1,645.1 ) 6,637.2 4,269.4 51.2 Total gains/(losses) Rs.  1,422.0 Rs.  15,366.1 Rs.  18,558.5 US$  222.7
Amounts Subject to Enforceable Netting Arrangements	As of March 31, 2023 Amounts subject to enforceable netting arrangements Effects of offsetting on balance sheet Related amounts not offset Gross Amounts Amounts Net amounts Financial Financial Net amount (In millions) Financial assets Derivative assets Rs.  121,749.4 Rs.  —  Rs.  121,749.4 Rs.  73,045.2 Rs.  19,402.2 Rs.  29,302.0 Securities purchased under agreements to resell 455,275.4 —  455,275.4 —  455,275.4 —  Financial liabilities Derivative liabilities Rs.  98,783.5 Rs.  —  Rs.  98,783.5 Rs.  73,045.2 Rs.  5,084.6 Rs.  20,653.7 Securities sold under repurchase agreements —  —  —  —  —  —  Long-term debt 90,200.0 —  90,200.0 —  90,200.0 —  (1) Comprised of securities and cash collaterals. These amounts are limited to the asset/liability balance, and accordingly, do not include excess collateral received/pledged. As of March 31, 2024 Amounts subject to enforceable netting arrangements Effects of offsetting on balance sheet Related amounts not offset Gross Amounts Amounts Net amounts Financial Financial Net amount Net amount (In millions) Financial assets Derivative assets Rs.  109,038.5 Rs.  — Rs.  109,038.5 Rs.  58,377.4 Rs.  15,690.4 Rs.  34,970.7 US$  419.6 Securities purchased under agreements to resell 34,178.3 —  34,178.3 —  34,178.3 —  —  Financial liabilities Derivative liabilities Rs.  109,409.9 Rs.  —  Rs.  109,409.9 Rs.  58,377.4 Rs.  24,274.5 Rs.  26,758.0 US$ 321.1 Securities sold under repurchase agreements 56,541.0 — 56,541.0 —  56,541.0 — — (1) Comprised of securities and cash collaterals. These amounts are limited to the asset/liability balance, and accordingly, do not include excess collateral received/pledged.
Schedule of Guarantor Obligations	Details of guarantees and documentary credits outstanding are set out below: As of March 31, 2023 2024 2024 (In millions) Nominal values: Bank guarantees: Financial guarantees Rs.  494,191.3 Rs.  610,381.3 US$ 7,324.0 Performance guarantees 519,953.0 653,452.8 7,840.8 Documentary credits 614,555.5 710,083.8 8,520.3 Total Rs.  1,628,699.8 Rs.  1,973,917.9 US$  23,685.1 Estimated fair value: Guarantees Rs.  (7,041.8 ) Rs.  (9,066.2 ) US$  (108.8 ) Documentary credits (869.3 ) (1,018.9 ) (12.2 ) Total Rs.  (7,911.1 ) Rs.  (10,085.1 ) US$  (121.0 )
Summary of allowance for Credit Losses on Off-Balance sheet credit exposures and undrawn commitments	The allowance for credit losses included in accrued expenses and other liabilities on off-balance sheet credit exposures and undrawn commitments is as follows: As of March 31, 2023 2024 2024 (In millions) Allowance for credit losses, beginning of the period Rs.  6,087.6 5,818.7 US$ 69.8 Net provision for credit exposures (268.9 ) 1,421.8 17.1 Allowance for credit losses, end of the period Rs.  5,818.7 7,240.5 US$  86.9

Estimated fair value of finan_2

Estimated fair value of financial instruments (Tables)	12 Months Ended
	Mar. 31, 2024
Fair Value, by Balance Sheet Grouping	As of March 31, 2023 March 31, 2024 Estimated fair value Estimated fair value Carrying Level 1 Level 2 Level 3 Total Carrying Level 1 Level 2 Level 3 Total Carrying Estimated (In millions) Financial Assets: Cash and due from banks, and restricted cash Rs.  1,387,395.2 Rs.  1,387,395.2 Rs.  —  Rs.  —  Rs.  1,387,395.2 2,086,031.4 2,086,031.4 Rs.  —  Rs.  —  2,086,031.4 US$ 25,030.4 US$ 25,030.4 Investments held for trading 135,831.1 184.1 135,647.0 —  135,831.1 461,245.3 290,951.1 148,296.2 21,998.0 461,245.3 5,534.5 5,534.5 Investments available for sale debt securities 4,878,844.0 507,504.1 4,222,904.3 148,435.6 4,878,844.0 8,295,487.1 548,944.7 7,608,007.7 138,534.7 8,295,487.1 99,537.9 99,537.9 Securities purchased under agreements to resell 455,275.4 —  455,275.4 —  455,275.4 34,178.3 —  34,178.3 —  34,178.3 410.1 410.1 Loans 17,052,927.9 —  4,138,188.7 13,027,096.1 17,165,284.8 26,335,700.9 —  4,988,245.6 21,425,726.3 26,413,971.9 316,003.1 316,942.3 Accrued interest receivable 186,091.2 —  186,091.2 —  186,091.2 249,644.5 —  249,592.0 52.5 249,644.5 2,995.5 2,995.5 Separate a a —  —  —  —  —  955,416.3 808,309.4 147,106.9 —  955,416.3 11,464.1 11,464.1 Other assets 1,292,086.7 3,313.7 1,286,529.0 —  1,289,842.7 1,942,177.5 24,545.8 1,913,303.2 1,834.8 1,939,683.8 23,304.3 23,274.3 Financial Liabilities   Interest-bearing deposits 16,097,459.3 —  16,102,822.0 —  16,102,822.0 20,688,406.2 —  20,775,875.4 —  20,775,875.4 248,241.0 249,290.6 Non-interest-bearing deposits 2,729,176.3 —  2,729,176.3 —  2,729,176.3 3,079,829.4 —  3,079,829.4 —  3,079,829.4 36,955.0 36,955.0 Securities sold under repurchase agreements —  —  —  —  —  56,541.0 —  56,541.0 —  56,541.0 678.4 678.4 Short-term borrowings 1,089,897.5 —  1,088,380.5 —  1,088,380.5 1,313,737.1 —  1,314,424.4 —  1,314,424.4 15,763.6 15,771.8 Accrued interest payable 112,463.2 —  112,463.2 —  112,463.2 238,638.8 —  238,638.8 —  238,638.8 2,863.4 2,863.4 Long-term debt 2,054,436.4 —  2,045,541.9 —  2,045,541.9 6,648,772.0 —  6,639,457.7 —  6,639,457.7 79,778.9 79,667.1 Accrued expenses and other liabilities 567,643.6 —  567,643.6 —  567,643.6 690,851.5 —  688,513.7 2,337.8 690,851.5 8,289.6 8,289.6 Separate a l —  —  —  —  —  955,416.3 —  955,416.3 —  955,416.3 11,464.1 11,464.1 Liabilities on policies in force (*) —  —  —  —  —  55,544.1 —  55,544.1 —  55,544.1 666.5 666.5 (*) The liabilities on policies in force includes only the fair value of contracts that are classified as insurance contract

Segment information (Tables)

Segment information (Tables)	12 Months Ended
	Mar. 31, 2024
Schedule of Segment Reporting Information, by Segment	Summarized segment information for the fiscal years ended Fiscal year ended March 31, 2022 2023 Retail Wholesale Treasury Total Retail Wholesale Treasury Total (In millions) Net interest income/ (expense) (external) Rs.  418,823.0 Rs.  297,694.0 Rs.  32,322.5 Rs.  748,839.5 Rs.  474,489.5 Rs.  367,857.6 Rs.  71,641.4 Rs.  913,988.5 Net interest income/ (expense) (internal) 141,001.2 (113,339.0 ) (27,662.2 ) —  168,806.2 (116,903.5 ) (51,902.7 ) —  Net interest revenue 559,824.2 184,355.0 4,660.3 748,839.5 643,295.7 250,954.1 19,738.7 913,988.5 Less: Provision for credit losses 122,622.6 4,356.9 —  126,979.5 86,920.2 (12,706.4 ) —  74,213.8 Net interest revenue, after provision for credit losses 437,201.6 179,998.1 4,660.3 621,860.0 556,375.5 263,660.5 19,738.7 839,774.7 Non-interest revenue 203,468.5 55,813.2 11,292.5 270,574.2 252,576.6 42,286.9 (3,477.0 ) 291,386.5 Non-interest expense (345,321.5 ) (25,544.1 ) (2,406.4 ) (373,272.0 ) (432,689.9 ) (34,261.7 ) (1,827.8 ) (468,779.4 ) Income before income tax Rs.  295,348.6 Rs.  210,267.2 Rs.  13,546.4 Rs.  519,162.2 Rs.  376,262.2 Rs.  271,685.7 Rs.  14,433.9 Rs.  662,381.8 Income tax expense Rs.  132,559.2 Rs.  166,117.4 Segment assets: Segment total assets Rs.  11,384,802.9 Rs.  8,106,671.0 Rs.  1,622,231.6 Rs.  21,113,705.5 Rs.  13,599,750.2 Rs.  9,274,409.1 Rs.  2,881,464.7 Rs.  25,755,624.0 Fiscal year ended March 31, 2024 Retail Banking Wholesale Treasury Insurance Others Total Total (In millions) Net interest income/(expense) (external) Rs.  624,203.3 Rs.   249,868.7 Rs.   265,306.7 Rs.  86,474.6 Rs.  22,150.1 Rs.  1,248,003.4 US$  14,974.9 Net interest income/(expense) (internal) 178,794.9 65,798.9 (244,593.8 ) —  —  —  —  Net interest revenue 802,998.2 315,667.6 20,712.9 86,474.6 22,150.1 1,248,003.4 14,974.9 Less: Provision for credit losses 118,900.0 14,163.1 —  —  —  133,063.1 1,596.6 Net interest revenue, after provision for credit losses 684,098.2 301,504.5 20,712.9 86,474.6 22,150.1 1,114,940.3 13,378.3 Non-interest revenue 276,151.7 24,303.9 11,784.3 418,250.0 8,441.0 738,930.9 8,866.5 Non-interest expense (548,753.1 ) (84,735.1 ) (6,278.2 ) (493,763.8 ) (14,882.0 ) (1,148,412.2 ) (13,779.8 ) Income before income tax Rs.  411,496.8 Rs.  241,073.3 Rs.   26,219.0 Rs.  10,960.8 Rs.   15,709.1 Rs.    705,459.0 US$ 8,465.0 Income tax expense Rs.   77,827.1 US$ 933.9 Segment assets: Segment total assets Rs.  23,256,928.8 Rs.  13,133,744.0 Rs.  2,731,823.5 Rs.   4,387,398.1 Rs.   608,678.6 Rs.  44,118,573.0 US$  529,380.6

Commitments and contingencies (

Commitments and contingencies (Tables)	12 Months Ended
	Mar. 31, 2024
Summary Of Operating Lease Right Of Use Asset And Lease Liability	The Bank is party to operating leases for certain of its office premises and employee residences, with a renewal at the option of the Bank. Operating lease right-of-use assets and lease liabilities were as follows: As of March 31, 2023 2024 2024 (In millions) Right-of-use assets Rs.  89,989.3 Rs.  121,302.5 US$  1,455.5 Lease liabilities 97,658.9 131,043.0 1,572.4
Operating Leases of Lessee Disclosure	The total lease expenses were as follows: As of March 31, 2022 2023 2024 2024 (In millions) The total minimum lease expense during the year recognized in the consolidated statement of income Rs.  13,866.6 Rs.  17,591.4 Rs.  23,245.5 US$  278.9
Schedule of Future Minimum Rental Payments for Operating Leases	The future minimum lease payments as of March 31, 2024 were Due in fiscal year ending March 31: Operating leases (In millions, except for weighted averages) 2025 Rs. 20,541.8 US$ 246.5 2026 20,162.6 241.9 2027 19,678.9 236.1 2028 18,817.6 225.8 2029 17,610.2 211.3 Thereafter 86,273.8 1,035.2 Total lease payments Rs. 183,084.9 US$ 2,196.8 Less: imputed interest 52,041.9 624.4 Total operating lease liabilities Rs. 131,043.0 US$ 1,572.4 Weighted average remaining lease term (in years) 10 .2 10 .2 Weighted average discount rate 7.25 % 7.25 %
Movement in Provision for Reward Points	The movement in provision for credit card and debit card reward points as of March 31, 2023 and March 31, 2024 is as follows: As of March 31, 2023 2024 2024 (In millions) Opening provision of reward points Rs. 6,359.1 Rs. 6,963.2 US$ 83.6 Provision made during the year 5,537.3 7,921.1 95.0 Utilization/write back of provision (4,901.3 ) (6,248.8 ) (75.0 ) Effect of change in rate of accrual of reward points (31.9 ) —  —  Closing provision of reward points Rs. 6,963.2 Rs. 8,635.5 US$ 103.6

Related party transactions (Tab

Related party transactions (Tables)	12 Months Ended
	Mar. 31, 2024
Schedule of Related Party Transactions	Balances payable to related parties are as follows: As of March 31, 2023 2024 Principal Others Total Principal Others Total Total (In millions) Balances in non-interest-bearing deposits Rs.  25,637.8 Rs.  8,715.1 Rs.  34,352.9 Rs.  —  Rs.  2,522.6 Rs.  2,522.6 US$  30.3 Balances in interest-bearing deposits 1,755.1 1,611.9 3,367.0 —  4,006.3 4,006.3 48.1 Accrued expenses and other liabilities 773.5 —  773.5 —  —  —  —  Total Rs.  28,166.4 Rs.  10,327.0 Rs.  38,493.4 Rs.  —  Rs.  6,528.9 Rs.  6,528.9 US$  78.4 Balances receivable from related parties are as follows: As of March 31, 2023 2024 Principal Others Total Principal Others Total Total (In millions) Loans Rs.  —  Rs.  7.5 Rs.  7.5 Rs.  —  Rs.  34,504.5 Rs.  34,504.5 US$  414.0 Other assets 748.0 2,167.3 2,915.3 —  1,878.6 1,878.6 22.5 Investments available for sale securities —  —  —  —  28,364.6 28,364.6 340.3 Total Rs.  748.0 Rs.  2,174.8 Rs.  2,922.8 Rs. —  Rs.  64,747.7 Rs.  64,747.7 US$  776.8 Included in the determination of net income Fiscal year ended March 31, 2022 2023 2024 Principal Others Total Principal Others Total Principal Others Total Total (In millions) Non-interest revenue-Fees and commissions Rs.  4,639.3 Rs.  22,939.5 Rs.  27578.8 Rs.  5,888.2 Rs.  26,766.6 Rs.  32,654.8 Rs.  1,670.2 Rs.  8,205.3 Rs.  9,875.5 US$  118.5 Interest and Dividend revenue —  0.1 0.1 —  0.1 0.1 —  3,242.9 3,242.9 38.9 Interest expense-Deposits (204.3 ) (82.2 ) (286.5 ) (95.3 ) (606.1 ) (701.4 ) 30.6 115.4 146.0 1.8 Non-interest expense-Administrative and other (7,182.4 ) (4,558.9 ) (11,741.3 ) (8,631.1 ) (5,524.8 ) (14,155.9 ) (2,424.6 ) (4,140.1 ) (6,564.7 ) (78.8 ) Non-interest expense-Premises and equipment (19.2 ) —  (19.2 ) (15.6 ) —  (15.6 ) (0.5 ) (1.2 ) (1.7 ) —  Interest Expenses-Others —  —  —  —  —  —  —  514.7 514.7 6.2 Non-interest revenue-Others —  —  —  —  —  —  —  78.0 78.0 0.9

Earnings per equity share (Tabl

Earnings per equity share (Tables)	12 Months Ended
	Mar. 31, 2024
Weighted-average number of shares	As of March 31, 2022 2023 2024 Weighted average number of equity shares used in computing basic earnings per equity share 5,533,113,800 5,565,620,562 7,079,296,055 Effect of potential equity shares for stock options outstanding 30,366,023 21,552,766 28,156,373 Weighted average number of equity shares used in computing diluted earnings per equity share 5,563,479,823 5,587,173,328 7,107,452,428
Reconciliation of Earnings Per Share	The following are reconciliations Fiscal years ended March 31, 2022 2023 2024 2024 Basic earnings per share Rs.  69.76 Rs.  89.02 Rs.  88.66 US$  1.06 Effect of potential equity shares for stock options outstanding 0.38 0.34 0.35 0.01 Diluted earnings per share Rs.  69.38 Rs.  88.68 Rs.  88.31 US$  1.05 Basic earnings per ADS Rs.  209.28 Rs.  267.06 Rs.  265.98 US$  3.18 Effect of potential equity shares for stock options outstanding 1.14 1.02 1.05 0.03 Diluted earnings per ADS Rs.  208.14 Rs.  266.04 Rs.  264.93 US$  3.15

Subsidiaries and Affiliates (Ta

Subsidiaries and Affiliates (Tables)	12 Months Ended
	Mar. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
List of Subsidiaries	a. List of subsidiaries Name of Entity Background Holding % as at March 31, 2024 HDB Financial Services Limited (“HDBFSL”) A non-deposit taking non-banking finance company 95.2 HDFC Securities Limited Offers trading facilities in a range of equity, fixed income and derivative products to its clients 95.4 HDFC Life Insurance Company Limited (“HLIC”) Lender of long-term life insurance solutions provider in India, offering a range of individual and group insurance solutions 50.4 HDFC Asset Management Company Limited (“HAMC”) Investment manager to HDFC Mutual Fund 52.5 HDFC Sales Private Limited Strengthens the marketing and sales efforts by providing a dedicated sales force to sell home loans and other financial products, including public deposits 100.0 HDFC Capital Advisors Limited Acts as an Investment Manager for Category II Alternative Investment Funds registered with Securities and Exchange Board of India 89.0 HDFC Trustee Company Limited It provides Trusteeship services to HDFC Mutual Fund 100.0 Griha Investments Acts as investment manager to HIREF International LLC (the “Fund”) and its Special Purpose Vehicles 100.0 Griha Pte Limited Private Equity Fund Manager specializing in Real Estate Private Equity Investments in India. It is registered with the Monetary Authority of Singapore as a Fund Management Company 100.0 HDFC Education and (“HEADS”) The company is in the business of providing education management and consulting services. As directed by the RBI in connection with the Transaction, HEADS is expected to be fully divested no later than July 1, 2025 100.0
List of Affiliates	b. List of affiliates Name of Entity Background Holding % as at HDFC ERGO General Insurance Company Limited (“ERGO”) ERGO offers a complete range of general insurance products. 50.5

Fair value measurement (Tables)

Fair value measurement (Tables)	12 Months Ended
	Mar. 31, 2024
Information about Changes in Fair Value of Level 3 Assets Pertaining to Instruments Carried at Fair Value	The following table summarizes certain additional information about changes in the fair value Particulars As of March 31, 2023 (In millions) Beginning balance at April 1, 2022 Rs.  143,894.7 Total gains or losses (realized/ unrealized) — Included in net income —  — Included in other comprehensive income (2,776.3 ) Purchases/additions 110,969.4 Sales —  Issuances —  Settlements (103,652.2 ) Transfers into Level 3 —  Transfers out of Level 3 —  Foreign currency translation adjustment —  Ending balance at March 31, 2023 Rs.  148,435.6 Total amount of gains/ (losses) included in net income attributable to change in unrealized gains/ (losses) relating to assets still held at reporting date Rs  —  Change in unrealized gains/ losses for the period included in other comprehensive income for assets held at the end of the reporting period Rs  (1,867.6 ) Particulars As of March 31, 2024 (In millions) Beginning balance at April 1, 2023 Rs.  148,435.6 Total gains or losses (realized/unrealized) — Included in net income 614.5 — Included in other comprehensive income 1,531.8 Purchases/additions 113,003.2 Sales (619.8 ) Issuances — Settlements (101,447.7 ) Transfers into Level 3 — Transfers out of Level 3 (652.6 ) Foreign currency translation adjustment — Ending balance at March 31, 2024 Rs.  160,865.0 Total amount of gains/ (losses) included in net income attributable to change in unrealized gains/ (losses) relating to assets still held at reporting date Rs  650.2 Change in unrealized gains/ (losses) for the period included in other comprehensive income for assets held at the end of the reporting period Rs  1,196.9
Investments
Fair Value Measured on Recurring Basis	The following table summarizes investments measured at fair value on a recurring basis Fair Value Measurements Using Particulars Total Quoted prices in Significant other Significant (In millions) Trading account securities Rs.  135,831.1 Rs.  184.1 Rs.  135,647.0 Rs.  —  Securities available-for-sale 4,878,844.0 507,504.1 4,222,904.3 148,435.6 Equity securities ( ) 19,462.6 3,313.7 16,148.9 —  Total Rs.  5,034,137.7 Rs.  511,001.9 Rs.  4,374,700.2 Rs.  148,435.6 (*) Equity securities classified within other assets. The following table summarizes financial assets and financial liabilities measured at fair value on a recurring basis as of March 31, 2024, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value: Fair Value Measurements Using Particulars Total Quoted prices in Significant other Significant (In millions) Assets Trading account securities Rs.  461,245.3 Rs.  290,951.1 Rs.  148,296.2 Rs.  21,998.0 Securities available-for-sale 8,295,487.1 548,944.7 7,608,007.7 138,534.7 Equity securities ( ) 71,449.1 24,545.8 46,571.0 332.3 Separate Account Assets 955,416.3 808,309.4 147,106.9 —  Total Rs.  9,783,597.8 Rs.  1,672,751.0 Rs.  7,949,981.8 Rs.  160,865.0 Total US$ 117,393.8 US$ 20,071.4 US$ 95,392.2 US$ 1,930.2 Liabilities Liabilities on policies in force 237.2 —  237.2 —  Total Rs.  237.2 Rs.  —  Rs.  237.2 Rs.  —  Total US$ 2.8 US$ — US$ 2.8 US$ — (*) Equity securities classified within other assets.
Derivative
Fair Value Measured on Recurring Basis	The following table summarizes derivative instruments measured at fair value on a recurring basis as of March 31, 2023, segregated by the level of valuation inputs within the fair value hierarchy Fair Value Measurements Using Particulars Total Quoted prices in Significant other Significant (In millions) Derivative assets Rs.  121,749.4 Rs.  —  Rs.  121,749.4 Rs.  —  Derivative liabilities Rs.  98,783.5 Rs.  —  Rs.  98,783.5 Rs.  —  The following table summarizes derivative instruments measured at fair value on a recurring basis as of March 31, 2024, segregated by the level of valuation inputs within the fair value hierarchy: Fair Value Measurements Using Particulars Total Quoted prices in Significant other Significant (In millions) Derivative assets Rs.  109,038.5 Rs.  —  Rs.  109,038.5 Rs.  —  Derivative liabilities Rs.  109,409.9 Rs.  —  Rs.  109,409.9 Rs.  —

Bank Overview - Additional Info

Bank Overview - Additional Information (Detail)	Jun. 30, 2023
Housing Development Finance Corporation Limited
Nature Of Business [Line Items]
Equity ownership interest of the bank's largest shareholder	20.80%

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Mar. 31, 2024 Segment
Significant Accounting Policies [Line Items]
Reportable segments	5
Financial statements translation rate, Indian rupees (Rs.) equivalence of U.S. $1	83.34
HDFC Group [Member] | Minimum
Significant Accounting Policies [Line Items]
Percentage of voting rights in which bank consolidates subsidiary	50%
HDFC Group [Member] | Minimum | HDFC Bank Limited
Significant Accounting Policies [Line Items]
Bank voting rights	20%
HDFC Group [Member] | Maximum | HDFC Bank Limited
Significant Accounting Policies [Line Items]
Bank voting rights	50%

Property and Equipment Deprecia

Property and Equipment Depreciation Rate Over Estimated Useful Lives of Property and Equipment on Straight-Line Basis (Detail)	12 Months Ended
	Mar. 31, 2024
Premises
Property, Plant and Equipment [Line Items]
Rate of depreciation	1.67%
Software and systems
Property, Plant and Equipment [Line Items]
Rate of depreciation	20%
Equipment and furniture | Minimum
Property, Plant and Equipment [Line Items]
Rate of depreciation	10%
Equipment and furniture | Maximum
Property, Plant and Equipment [Line Items]
Rate of depreciation	33.33%

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Schedule of Intangible Assets And Basis Of Amortization (Detail)	12 Months Ended
	Mar. 31, 2024
Investment Management Contract [Member]
Schedule Of Intangible Assets [Line Items]
Indefinite Lived Intangible Asset Useful Life	Indefinite
Amortization method	Not applicable
Value of Business Acquired (VOBA) [Member]
Schedule Of Intangible Assets [Line Items]
Finite Lived Intangible Assets Useful Life	Life of the underlying contracts
Amortization method	Constant level basis	[1]
Distribution Network [Member]
Schedule Of Intangible Assets [Line Items]
Useful lives (years)	17 years
Amortization method	Straight line
Customer Relationship [Member]
Schedule Of Intangible Assets [Line Items]
Useful lives (years)	17 years
Amortization method	Straight line
Transferable Development Rights [Member]
Schedule Of Intangible Assets [Line Items]
Useful lives (years)	8 years
Amortization method	Straight line
Brand [Member]
Schedule Of Intangible Assets [Line Items]
Indefinite Lived Intangible Asset Useful Life	Indefinite
Indefinite Lived Intangible Assets Amortization Method	Not applicable
[1]VOBA is amortised on a constant-level basis that approximates straight-line amortization (Refer note 20)

Business Combination - Addition

Business Combination - Additional Information (Detail) ₨ / shares in Units, $ / shares in Units, ₨ in Thousands, $ in Millions

12 Months Ended

Mar. 19, 2024 INR (₨)

Mar. 19, 2024 USD ($)

Jul. 01, 2023 INR (₨) shares

Jul. 01, 2023 USD ($)

Jun. 30, 2023 INR (₨) ₨ / shares shares

Jun. 30, 2023 USD ($) shares

Mar. 31, 2024 INR (₨)

Mar. 31, 2024 USD ($)

Mar. 31, 2024 USD ($)

Jul. 01, 2023 USD ($) shares

Jun. 30, 2023 $ / shares

Mar. 31, 2023 INR (₨)

Mar. 31, 2023 USD ($)

Apr. 04, 2022 ₨ / shares shares

Mar. 31, 2022 INR (₨)

Mar. 31, 2022 USD ($)

Business Acquisition [Line Items]

Goodwill

₨ 1,629,510,300

$ 19,552.6

₨ 74,937,900

$ 899.3

₨ 74,937,900

$ 899.3

Goodwill written off related to sale of business unit

73,576,100

$ 882.9

HDFC Credila Financial Services Limited [Member] | Brand [Member]

Business Acquisition [Line Items]

Indefinite lived intangible assets written off related to sale of business unit

8,527,500

102.3

HDFC Credila Financial Services Limited [Member] | Distribution Service [Member]

Business Acquisition [Line Items]

Indefinite lived intangible assets written off related to sale of business unit

8,972,400

$ 107.6

eHDFC [Member]

Business Acquisition [Line Items]

Business acquisition, percentage of voting interests acquired

100%

100%

Number of shares received

42

Number of shares held for each set of shares received

25

Business acquisition, effective date of acquisition

Jul. 01, 2023

Jul. 01, 2023

Business combination, consideration transferred

₨ 5,337,741,500

$ 64,047.9

Business acquisition, share price | (per share)

₨ 1,701.4

$ 20.4

Business acquisition, equity interest issued or issuable, number of shares

3,110,396,492

3,110,396,492

Share based compensation by share based award number of shares underlying such awards post business combination

48,461,845

48,461,845

Class of warrants or rights outstanding

24,792,768

24,792,768

Goodwill

₨ 1,628,148,500

1,628,148,500

19,536.2

$ 19,536.2

Indefinite-lived intangible assets, purchase accounting adjustments

1,434,818,100

$ 17,216.4

Business acquisition, transaction costs

₨ 1,900,000

22.8

Per share value of shares received | ₨ / shares

₨ 1

Per share value of shares held for each set of shares received | ₨ / shares

₨ 2

Pro forma Advances and debt including its related tax effects

₨ 36,984,300

$ 443.8

₨ 41,204,200

$ 494.4

eHDFC [Member] | Equity Interest [Member]

Business Acquisition [Line Items]

Equity ownership interest of the bank's largest shareholder

20.80%

20.80%

eHDFC [Member] | HDFC Credila Financial Services Limited [Member]

Business Acquisition [Line Items]

Disposal group, including discontinued operation, assets

₨ 103,500,000

1,241.9

Goodwill written off related to sale of business unit

₨ 73,576,100

$ 882.9

73,576,100

$ 882.8

eHDFC [Member] | HDFC Credila Financial Services Limited [Member] | Brand [Member]

Business Acquisition [Line Items]

Indefinite lived intangible assets written off related to sale of business unit

8,527,500

102.3

eHDFC [Member] | HDFC Credila Financial Services Limited [Member] | Distribution Service [Member]

Business Acquisition [Line Items]

Indefinite lived intangible assets written off related to sale of business unit

8,972,400

$ 107.6

eHDFC [Member] | HDFC Education and Development Services Limited [Member]

Business Acquisition [Line Items]

Disposal group, including discontinued operation, assets

1,976,000

23.7

Goods and Service Tax [Member] | eHDFC [Member]

Business Acquisition [Line Items]

Business combination recognized identifiable asset acquired and liabilities assumed contingent liability

₨ 11,063,000

$ 132.7

Asset Acquired Liabilities Assu

Asset Acquired Liabilities Assumed in Business Combination (Detail) ₨ in Millions, $ in Millions	Jul. 01, 2023 INR (₨)	Jul. 01, 2023 USD ($)	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Jul. 01, 2023 USD ($)	Mar. 31, 2023 INR (₨)	Mar. 31, 2023 USD ($)	Mar. 31, 2022 INR (₨)	Mar. 31, 2022 USD ($)
B. Recognized amounts of identifiable liabilities assumed and Noncontrolling Interests
Goodwill			₨ 1,629,510.3	$ 19,552.6		₨ 74,937.9	$ 899.3	₨ 74,937.9	$ 899.3
eHDFC [Member]
Consideration
Common equity share issued (3,110,396,492 shares of the Bank)	₨ 5,292,028.6				$ 63,499.3
Share-based compensation	35,240.7				422.9
Share warrants	10,472.2				125.7
Fair value of total consideration transferred	5,337,741.5	$ 64,047.9
Settlement of pre-existing relationship	(69,312.6)				(831.7)
Investment in the Bank by eHDFC	(1,981,494.4)				(23,776)
Fair value of net purchase consideration transferred	3,286,934.5	39,440.2
Acquisition-related costs	1,900	$ 22.8
A. Recognised amounts of identifiable assets acquired
Cash and due from banks	10,344.1				124.1
Investment securities	2,842,356.2				34,105.5
Loans - Net	6,428,635.4				77,137.5
Accrued interest receivable	37,276.7				447.3
Property and equipment	39,136.2				469.6
Identified intangibles assets	1,434,818.1				17,216.4
Other assets	622,978.8				7,475.1
Separate account assets	857,528.7				10,289.5
Total estimated assets acquired	12,273,074.2				147,265
B. Recognized amounts of identifiable liabilities assumed and Noncontrolling Interests
Deposits	1,571,204.5				18,852.9
Accrued expenses and other liabilities	781,742.3				9,380
Borrowings	4,977,276.5				59,722.5
Separate account liabilities	857,528.7				10,289.5
Liabilities on policies in force	1,499,749.1				17,995.5
Noncontrolling Interest in eHDFC subsidiaries	926,787.1				11,120.6
Total estimated liabilities assumed	10,614,288.2				127,361
Goodwill	₨ 1,628,148.5				$ 19,536.2

Asset Acquired Liabilities As_2

Asset Acquired Liabilities Assumed in Business Combination (Parentheticals) (Detail)	Jul. 01, 2023 shares
eHDFC [Member]
Business Acquisition [Line Items]
Common equity share issued	3,110,396,492

Goodwill Recorded as a Result o

Goodwill Recorded as a Result of the Acquisition to the Bank's Reportable Segments (Detail) ₨ in Millions, $ in Millions	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Jul. 01, 2023 INR (₨)	Jul. 01, 2023 USD ($)	Mar. 31, 2023 INR (₨)	Mar. 31, 2023 USD ($)	Mar. 31, 2022 INR (₨)	Mar. 31, 2022 USD ($)
Business Combination Segment Allocation [Line Items]
Goodwill	₨ 1,629,510.3	$ 19,552.6			₨ 74,937.9	$ 899.3	₨ 74,937.9	$ 899.3
Retail Banking [Member]
Business Combination Segment Allocation [Line Items]
Goodwill	443,017.5				74,937.9		74,937.9
Wholesale Banking [Member]
Business Combination Segment Allocation [Line Items]
Goodwill	71,617.3				0		0
Insurance Services [Member]
Business Combination Segment Allocation [Line Items]
Goodwill	959,080				0		0
Others [Member]
Business Combination Segment Allocation [Line Items]
Goodwill	155,795.5				₨ 0		₨ 0
eHDFC [Member]
Business Combination Segment Allocation [Line Items]
Goodwill	₨ 1,628,148.5	$ 19,536.2	₨ 1,628,148.5	$ 19,536.2
eHDFC [Member] | Retail Banking [Member]
Business Combination Segment Allocation [Line Items]
Goodwill			368,079.6	4,416.6
eHDFC [Member] | Wholesale Banking [Member]
Business Combination Segment Allocation [Line Items]
Goodwill			71,617.3	859.3
eHDFC [Member] | Insurance Services [Member]
Business Combination Segment Allocation [Line Items]
Goodwill			959,080	11,508
eHDFC [Member] | Others [Member]
Business Combination Segment Allocation [Line Items]
Goodwill			₨ 229,371.6	$ 2,752.3

Major Class of Identifiable Acq

Major Class of Identifiable Acquired Intangible Assets and Estimated Period of Amortisation (Detail) - Jul. 01, 2023 ₨ in Millions, $ in Millions	INR (₨)	USD ($)
Finite-Lived Intangible Assets [Line Items]
Total	₨ 1,434,818.1	$ 17,216.4
Brand [Member] | Relief from royalty method [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value	₨ 750,758.2	9,008.4
Valuation Methodology	Relief from royalty method
Investment management contract [Member] | Multi-period excess earnings method [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value	₨ 369,785.6	4,437.1
Valuation Methodology	Multi-period excess earnings method
Value of business acquired [Member] | Refer below [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value	₨ 221,738.5	2,660.6
Valuation Methodology	Refer below
Distribution network [Member] | Multi-period excess earnings method [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value	₨ 59,543.2	714.5
Useful lives (in years)	17 years
Valuation Methodology	Multi-period excess earnings method
Customer relationship [Member] | Multi-period excess earnings method [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value	₨ 29,874.9	358.4
Useful lives (in years)	17 years
Valuation Methodology	Multi-period excess earnings method
Transferable development rights [Member] | Comparison method [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value	₨ 3,117.7	$ 37.4
Useful lives (in years)	8 years
Valuation Methodology	Comparison method

Pro Forma Financial Information

Pro Forma Financial Information (Detail) ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)	Mar. 31, 2023 USD ($)
Business Combinations [Abstract]
Revenue	₨ 2,303,956.6	$ 27,645.3	₨ 2,147,961.5	$ 25,773.5
Net Income	₨ 645,526	$ 7,745.7	₨ 636,783.4	$ 7,640.8

Details of PCD of EHDFC (Detail

Details of PCD of EHDFC (Detail) - Jul. 01, 2023 - eHDFC [Member] ₨ in Millions, $ in Millions	INR (₨)	USD ($)
Disclosure Of Financing Receivable Purchased With Credit Deterioration [Line Items]
Par value of PCD loans at acquisition	₨ 116,646.3	$ 1,399.6
Allowance for credit losses on PCD loans at acquisition	39,415.2	472.9
Fair value of receivables at acquisition	77,200.4	926.3
Non-credit discount/(premium) on PCD loans at acquisition	30.7	$ 0.4
Wholesale
Disclosure Of Financing Receivable Purchased With Credit Deterioration [Line Items]
Par value of PCD loans at acquisition	72,684.7
Allowance for credit losses on PCD loans at acquisition	36,487.3
Fair value of receivables at acquisition	36,197.4
Non-credit discount/(premium) on PCD loans at acquisition	0
Retail
Disclosure Of Financing Receivable Purchased With Credit Deterioration [Line Items]
Par value of PCD loans at acquisition	43,961.6
Allowance for credit losses on PCD loans at acquisition	2,927.9
Fair value of receivables at acquisition	41,003
Non-credit discount/(premium) on PCD loans at acquisition	₨ 30.7

Details of Pre-Exiting Relation

Details of Pre-Exiting Relationship Between HDFC Bank Group ("the Bank and its Subsidiaries") and eHDFC Group (Detail) - Jul. 01, 2023 - eHDFC [Member] ₨ in Millions, $ in Millions	INR (₨)	USD ($)
Disclosure In Tabular Form Of Prexisting Relationship With Acquiree And Its Subsidiaries [Line Items]
Cash and due from Banks	₨ 52,875.3	$ 634.4
Investments, available for sale, at market	18,407.5	220.9
Accrued expenses and other liabilities	(5,777.5)	(69.3)
Other assets	3,807.3	45.7
Net Assets	₨ 69,312.6	$ 831.7

Cash and Due From Banks, and _2

Cash and Due From Banks, and Restricted Cash - Additional Information (Detail) ₨ in Millions, $ in Millions	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	₨ 1,182,004.6	$ 14,182.9	₨ 902,006.6

Portfolio of Trading Securities

Portfolio of Trading Securities (Detail) ₨ in Millions, $ in Millions	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized Cost	₨ 392,828.3	$ 4,713.5	₨ 135,480.2
Gross Unrealized Gains	76,054.3	912.6	376.6
Gross Unrealized Losses	7,637.3	91.6	25.7
Fair Value	461,245.3	$ 5,534.5	135,831.1
Debt Securities
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized Cost	103,506.9		127,313.8
Gross Unrealized Gains	136.1		122.6
Gross Unrealized Losses	205		25.7
Fair Value	103,438		127,410.7
Debt Securities | Government of India securities
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized Cost	71,673		106,952.3
Gross Unrealized Gains	58.8		103.6
Gross Unrealized Losses	0		23.2
Fair Value	71,731.8		107,032.7
Debt Securities | Other corporate/financial institution securities
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized Cost	31,833.9		20,361.5
Gross Unrealized Gains	77.3		19
Gross Unrealized Losses	205		2.5
Fair Value	31,706.2		20,378
Other securities (including mutual fund units)
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized Cost	289,321.4		8,166.4
Gross Unrealized Gains	75,918.2		254
Gross Unrealized Losses	7,432.3		0
Fair Value	₨ 357,807.3		₨ 8,420.4

Portfolio of AFS Debt Securitie

Portfolio of AFS Debt Securities (Detail) ₨ in Millions, $ in Millions	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	₨ 8,306,160.5	$ 99,666	₨ 4,979,205.7
Gross Unrealized Gains	65,491	785.8	6,552.9
Gross Unrealized Losses	76,164.4	913.9	106,914.6
Fair Value	8,295,487.1	99,537.9	4,878,844
Debt securities, other than asset and mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	8,167,306.7		4,828,914.5
Gross Unrealized Gains	65,153.1		6,497.7
Gross Unrealized Losses	75,520.9		105,021.4
Fair Value	8,156,938.9	$ 97,875.5	4,730,390.8
Debt securities, other than asset and mortgage-backed securities | Government of India securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	6,105,313.9		3,860,431.8
Gross Unrealized Gains	41,090.5		4,656.4
Gross Unrealized Losses	52,213.3		80,344.5
Fair Value	6,094,191.1		3,784,743.7
Debt securities, other than asset and mortgage-backed securities | State government securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1,188,315		428,980.9
Gross Unrealized Gains	7,600.4		1,322.5
Gross Unrealized Losses	12,234.4		15,604.8
Fair Value	1,183,681		414,698.6
Debt securities, other than asset and mortgage-backed securities | Government securities outside India
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	3,556.3		819
Gross Unrealized Gains	3.9		0
Gross Unrealized Losses	18.4		21.8
Fair Value	3,541.8		797.2
Debt securities, other than asset and mortgage-backed securities | Credit substitutes
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	133,197.8		511,161.4
Gross Unrealized Gains	321.7		505.4
Gross Unrealized Losses	2,032.6		8,479
Fair Value	131,486.9		503,187.8
Debt securities, other than asset and mortgage-backed securities | Other corporate/financial institution bonds
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	736,923.7		27,521.4
Gross Unrealized Gains	16,136.6		13.4
Gross Unrealized Losses	9,022.2		571.3
Fair Value	744,038.1		26,963.5
Mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	78.1		19.3
Gross Unrealized Gains	2.3		0
Gross Unrealized Losses	1.2		1.8
Fair Value	79.2		17.5
Asset-backed securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	138,775.7		150,271.9
Gross Unrealized Gains	335.6		55.2
Gross Unrealized Losses	642.3		1,891.4
Fair Value	138,469		148,435.7
Securities with gross unrealized losses
Schedule of Available-for-sale Securities [Line Items]
Fair Value	3,706,475.3		3,220,573.8
Securities with gross unrealized gains
Schedule of Available-for-sale Securities [Line Items]
Fair Value	₨ 4,589,011.8		₨ 1,658,270.2

Investments, Available for Sale

Investments, Available for Sale Debt Securities - Additional Information (Detail) ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)	Mar. 31, 2024 USD ($)
Schedule of Available-for-sale Securities [Line Items]
Investments available for sale, at fair value, restricted investments	₨ 1,792,147.6		₨ 2,070,953.6	$ 21,504.1
Debt Securities, Available-for-sale, Unrealized Loss	64,466.1
Net allowance for credit losses	(70.9)	$ (0.9)	70.9
Available-for-Sale Debt Securities
Schedule of Available-for-sale Securities [Line Items]
Available for sale investments, amount eligible towards the Bank's statutory liquidity reserve requirements	6,340,926.3		4,199,442.3	76,085
Investments available for sale, at fair value, restricted investments	1,792,147.6		2,070,953.6	$ 21,504.1
Available-for-Sale Debt Securities | Accounting ​Guidance​ [Member]
Schedule of Available-for-sale Securities [Line Items]
Net allowance for credit losses	0		₨ 70.9
HDB Debt Securities Other Than Asset And Mortgage Backed Securities | Government Issued or Backed Securities
Schedule of Available-for-sale Securities [Line Items]
Net allowance for credit losses	₨ 0
Mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Average credit rating	AAA	AAA
Asset-backed securities
Schedule of Available-for-sale Securities [Line Items]
Average credit rating	AAA	AAA

Gross Unrealized Losses and Fai

Gross Unrealized Losses and Fair Value of Available for Sale Debt Securities (Detail) ₨ in Millions, $ in Millions	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)
Gain (Loss) on Securities [Line Items]
Less Than 12 Months Fair Value	₨ 688,638.6	$ 8,263	₨ 1,500,675.9
Less Than 12 Months Unrealized Losses	835.6	10	19,859.2
12 Months or Greater Fair Value	3,017,836.7	36,211.1	1,719,897.9
12 Months or Greater Unrealized Losses	75,328.8	903.9	87,055.4
Fair Value	3,706,475.3	44,474.1	3,220,573.8
Unrealized Losses	76,164.4	$ 913.9	106,914.6
Debt securities, other than asset and mortgage-backed securities
Gain (Loss) on Securities [Line Items]
Less Than 12 Months Fair Value	688,638.6		1,390,130.2
Less Than 12 Months Unrealized Losses	835.6		18,781.9
12 Months or Greater Fair Value	2,956,555.9		1,693,782.3
12 Months or Greater Unrealized Losses	74,685.3		86,239.5
Fair Value	3,645,194.5		3,083,912.5
Unrealized Losses	75,520.9		105,021.4
Debt securities, other than asset and mortgage-backed securities | Government of India securities
Gain (Loss) on Securities [Line Items]
Less Than 12 Months Fair Value	566,117.5		1,038,004.8
Less Than 12 Months Unrealized Losses	177.4		12,622.5
12 Months or Greater Fair Value	2,179,342.3		1,266,775.4
12 Months or Greater Unrealized Losses	52,035.9		67,722
Fair Value	2,745,459.8		2,304,780.2
Unrealized Losses	52,213.3		80,344.5
Debt securities, other than asset and mortgage-backed securities | State government securities
Gain (Loss) on Securities [Line Items]
Less Than 12 Months Fair Value	103,876.2		75,707.7
Less Than 12 Months Unrealized Losses	199.2		1,923.6
12 Months or Greater Fair Value	440,474.4		270,099.2
12 Months or Greater Unrealized Losses	12,035.2		13,681.2
Fair Value	544,350.6		345,806.9
Unrealized Losses	12,234.4		15,604.8
Debt securities, other than asset and mortgage-backed securities | Government securities outside India
Gain (Loss) on Securities [Line Items]
Less Than 12 Months Fair Value	0		797.2
Less Than 12 Months Unrealized Losses	0		21.8
12 Months or Greater Fair Value	814.3		0
12 Months or Greater Unrealized Losses	18.4		0
Fair Value	814.3		797.2
Unrealized Losses	18.4		21.8
Debt securities, other than asset and mortgage-backed securities | Credit substitutes
Gain (Loss) on Securities [Line Items]
Less Than 12 Months Fair Value	5,745.3		254,023.6
Less Than 12 Months Unrealized Losses	293.3		3,771
12 Months or Greater Fair Value	97,997.4		152,702.6
12 Months or Greater Unrealized Losses	1,739.3		4,708
Fair Value	103,742.7		406,726.2
Unrealized Losses	2,032.6		8,479
Debt securities, other than asset and mortgage-backed securities | Other corporate/financial institution bonds
Gain (Loss) on Securities [Line Items]
Less Than 12 Months Fair Value	12,899.6		21,596.9
Less Than 12 Months Unrealized Losses	165.7		443
12 Months or Greater Fair Value	237,927.5		4,205.1
12 Months or Greater Unrealized Losses	8,856.5		128.3
Fair Value	250,827.1		25,802
Unrealized Losses	9,022.2		571.3
Mortgage-backed securities
Gain (Loss) on Securities [Line Items]
Less Than 12 Months Fair Value	0		0
Less Than 12 Months Unrealized Losses	0		0
12 Months or Greater Fair Value	13.5		17.5
12 Months or Greater Unrealized Losses	1.2		1.8
Fair Value	13.5		17.5
Unrealized Losses	1.2		1.8
Asset-backed securities
Gain (Loss) on Securities [Line Items]
Less Than 12 Months Fair Value	0		110,545.7
Less Than 12 Months Unrealized Losses	0		1,077.3
12 Months or Greater Fair Value	61,267.3		26,098.1
12 Months or Greater Unrealized Losses	642.3		814.1
Fair Value	61,267.3		136,643.8
Unrealized Losses	₨ 642.3		₨ 1,891.4

Investments, Available for Sa_2

Investments, Available for Sale Debt Securities -Summary of Allowances for Available for sale debt Securities (Detail) ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance for credit losses, beginning of the period	₨ 70.9	$ 0.9	₨ 0
Write- offs	0	0	0
Net allowance for credit losses	(70.9)	(0.9)	70.9
Allowance for credit losses, end of the period	0	$ 0	70.9
Credit Substitutes
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance for credit losses, beginning of the period	70.9		0
Write- offs	0		0
Net allowance for credit losses	(70.9)		70.9
Allowance for credit losses, end of the period	0		70.9
Other corporate/financial institution bonds
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance for credit losses, beginning of the period	0		0
Write- offs	0		0
Net allowance for credit losses	0		0
Allowance for credit losses, end of the period	₨ 0		₨ 0

Contractual Residual Maturity o

Contractual Residual Maturity of Available for Sale Debt Securities Other Than Asset and Mortgage Backed Securities (Detail) ₨ in Millions, $ in Millions	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)
Fair Value
Total	₨ 8,295,487.1	$ 99,537.9	₨ 4,878,844
Debt securities, other than asset and mortgage-backed securities
Amortized Cost
Within one year	1,216,195.2
Over one year through five years	1,704,481.9
Over five years through ten years	2,910,153.3
Over ten years	2,336,476.3
Amortized Cost	8,167,306.7
Fair Value
Within one year	1,213,814.5	14,564.6
Over one year through five years	1,693,976.3	20,326.1
Over five years through ten years	2,895,370.6	34,741.7
Over ten years	2,353,777.5	28,243.1
Total	₨ 8,156,938.9	$ 97,875.5	₨ 4,730,390.8

Contractual Residual Maturity_2

Contractual Residual Maturity of Available for Sale Mortgage-Backed and Asset-Backed Debt Securities (Detail) ₨ in Millions, $ in Millions	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)
Fair Value
Total	₨ 8,295,487.1	$ 99,537.9	₨ 4,878,844
Asset and Mortgage Backed Securities
Amortized Cost
Within one year	61,860.3
Over one year through five years	76,625.4
Over five years through ten years	315.6
Over ten years	52.5
Amortized Cost	138,853.8
Fair Value
Within one year	61,602.9	739.2
Over one year through five years	76,564.7	918.7
Over five years through ten years	326.2	3.9
Over ten years	54.4	0.6
Total	₨ 138,548.2	$ 1,662.4

Gross Realized Gains and Gross

Gross Realized Gains and Gross Realized Losses from Sales of Available for Sale Debt Securities and Dividends and Interest on Such Securities (Detail) ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)	Mar. 31, 2022 INR (₨)
Schedule of Available-for-sale Securities [Line Items]
Gross realized gains on sale	₨ 3,592.4	$ 43.1	₨ 259.1	₨ 18,604.5
Gross realized losses on sale	(2,765.7)	(33.2)	(979.4)	(1,858.7)
Realized gains/ (losses), net	826.7	9.9	(720.3)	16,745.8
Dividends and interest	516,550	6,198.1	304,566.7	240,943
Total	₨ 517,376.7	$ 6,208	₨ 303,846.4	₨ 257,688.8

Fair Value of Credit Substitute

Fair Value of Credit Substitutes by Type of Instrument (Detail) ₨ in Millions, $ in Millions	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)
Schedule of Available-for-sale Securities [Line Items]
Fair Value	₨ 8,295,487.1	$ 99,537.9	₨ 4,878,844
Debt securities, other than asset and mortgage-backed securities | Credit Substitutes
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	133,197.8	1,598.2	511,161.4
Fair Value	131,486.9	$ 1,577.7	503,187.8
Debt securities, other than asset and mortgage-backed securities | Credit Substitutes | Debentures
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	132,926.5		510,880.4
Fair Value	131,458.6		503,187.6
Debt securities, other than asset and mortgage-backed securities | Credit Substitutes | Preference shares
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	271.3		281
Fair Value	28.3		0.2
Debt securities, other than asset and mortgage-backed securities | Credit Substitutes | Commercial paper
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	0		0
Fair Value	₨ 0		₨ 0

Fair Value of Credit Substitu_2

Fair Value of Credit Substitutes (Detail) ₨ in Millions, $ in Millions	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)
Schedule of Available-for-sale Securities [Line Items]
Pass	₨ 131,486.9	$ 1,577.7	₨ 503,187.8
Non-performing—gross balance	0	0	0
Less: Non-performing losses	0	0	0
Non-performing credit substitutes, net	0	0	0
Total credit substitutes, net	₨ 131,486.9	$ 1,577.7	₨ 503,187.8

Impaired Credit Substitutes (De

Impaired Credit Substitutes (Detail) - Debt securities, other than asset and mortgage-backed securities ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)	Mar. 31, 2024 USD ($)
Schedule of Available-for-sale Securities [Line Items]
Average non-performing credit substitutes	₨ 0	$ 0	₨ 0
Interest income recognized on non-performing credit substitutes	0	$ 0	0
Credit Substitutes
Schedule of Available-for-sale Securities [Line Items]
Gross non-performing credit substitutes	0		0	$ 0
Credit Substitutes by Industry
Schedule of Available-for-sale Securities [Line Items]
Gross non-performing credit substitutes	₨ 0		₨ 0	$ 0

Repurchase and Resell Agreeme_2

Repurchase and Resell Agreements - Additional Information (Detail) ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)
Repurchase Agreement and Resale Agreement Counterparty [Line Items]
Securities purchased under agreements to resell	₨ 34,178.3	$ 410.1	₨ 455,275.4
Securities sold under repurchase agreements, amount outstanding	₨ 56,541	$ 678.4	₨ 0
Maximum
Repurchase Agreement and Resale Agreement Counterparty [Line Items]
Securities purchased under agreements to resell, maturity (days)	14 days
Securities sold under repurchase agreements, maturity (days)	14 days

Loans - Additional Information

Loans - Additional Information (Detail) ₨ in Millions, $ in Millions	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans provided as collateral for borrowings	₨ 2,288,842.6	$ 27,463.9	₨ 1,927,514.2
Purchased financing receivable outstanding	2,600.7		1,024,684.4
Loans receivable restructured due to unexpected event	72,900	$ 900	86,100
Retail Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable restructured due to unexpected event	81,400		68,600
Wholesale Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable restructured due to unexpected event	₨ 4,700		₨ 4,300
Current Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of days past due up to which loans	90 days	90 days
Crop related agricultural loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of days past due up to which loans	366 days	366 days

Loans by Facility (Detail)

Loans by Facility (Detail) ₨ in Millions, $ in Millions	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)	Mar. 31, 2023 USD ($)	Mar. 31, 2022 INR (₨)	Mar. 31, 2021 INR (₨)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	₨ 26,793,047.4	$ 321,490.8	₨ 17,418,092.4
Less: Allowance for credit losses	457,346.5	5,487.7	365,164.5	$ 4,381.6	₨ 372,671.8	₨ 343,528.7
Total	26,335,700.9	316,003.1	17,052,927.9
Auto loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less: Allowance for credit losses	29,948.9		33,835.5		41,769.4	39,396.1
Personal loans/Credit card
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less: Allowance for credit losses	116,999.6		99,634.4		111,566.4	110,081
Retail business banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less: Allowance for credit losses	75,300.5		63,974.8		49,055	42,288.4
Commercial vehicle and construction equipment finance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less: Allowance for credit losses	32,096.1		31,130.6		31,750.9	26,356.7
Housing loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less: Allowance for credit losses	9,906.8		3,269.9		2,692.2	4,578
Other retail loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less: Allowance for credit losses	80,453.8		72,012.4		61,437	49,229.2
Retail Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	19,590,408.1	235,066.1	11,506,580.3
Retail Loans | Auto loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	1,378,523.1	16,541	1,221,097.6
Retail Loans | Personal loans/Credit card
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	3,119,246.7	37,428	2,782,828.5
Retail Loans | Retail business banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	4,207,836.2	50,490	3,378,625.2
Retail Loans | Commercial vehicle and construction equipment finance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	1,619,602.9	19,433.7	1,285,887.8
Retail Loans | Housing loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	6,993,168	83,911.3	1,020,901.6
Retail Loans | Other retail loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	2,272,031.2	27,262.1	1,817,239.6
Wholesale loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	7,202,639.3	$ 86,424.7	5,911,512.1
Less: Allowance for credit losses	₨ 112,640.8		₨ 61,306.9		₨ 74,400.9	₨ 71,599.3

Maturity of Gross Loans (Detail

Maturity of Gross Loans (Detail) ₨ in Millions, $ in Millions	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	₨ 26,793,047.4	$ 321,490.8	₨ 17,418,092.4
Wholesale loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	7,202,639.3	86,424.7	5,911,512.1
Retail loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	19,590,408.1	235,066.1	₨ 11,506,580.3
Gross Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Within one year	6,203,404.9
Over one year through five years	13,668,029.7
Over five years	6,921,612.8
Total gross loans	26,793,047.4	321,490.8
Gross Loans | Wholesale loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Within one year	2,011,692.4
Over one year through five years	3,675,651.9
Over five years	1,515,295
Total gross loans	7,202,639.3	86,424.7
Gross Loans | Retail loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Within one year	4,191,712.5
Over one year through five years	9,992,377.8
Over five years	5,406,317.8
Total gross loans	₨ 19,590,408.1	$ 235,066.1

Loan Delinquency and Non-Accrua

Loan Delinquency and Non-Accrual Loans (Detail) ₨ in Millions, $ in Millions		Mar. 31, 2024 INR (₨)		Mar. 31, 2024 USD ($)		Mar. 31, 2023 INR (₨)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans		₨ 26,793,047.4		$ 321,490.8		₨ 17,418,092.4
Finance receivable on non-accrual status		327,443.9		3,929		200,708.8
Retail Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans		19,590,408.1		235,066.1		11,506,580.3
Retail Loans | Auto loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans		1,378,523.1		16,541		1,221,097.6
Finance receivable on non-accrual status		14,998				15,941.6
Retail Loans | Personal loans/Credit card
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans		3,119,246.7		37,428		2,782,828.5
Finance receivable on non-accrual status		25,466.5				22,770.1
Retail Loans | Retail business banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans		4,207,836.2		50,490		3,378,625.2
Finance receivable on non-accrual status		53,355.4				43,937.8
Retail Loans | Commercial vehicle and construction equipment finance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans		1,619,602.9		19,433.7		1,285,887.8
Finance receivable on non-accrual status		21,563.6				21,823.8
Retail Loans | Housing loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans		6,993,168		83,911.3		1,020,901.6
Finance receivable on non-accrual status		43,712.7				5,900.3
Retail Loans | Other Retail
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans		2,272,031.2		27,262.1		1,817,239.6
Finance receivable on non-accrual status		61,520				56,822.9
Wholesale loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans		7,202,639.3		86,424.7		5,911,512.1
Finance receivable on non-accrual status		106,827.7				33,512.3
31 to 90 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans		161,159.9		1,933.8		100,768.4
31 to 90 days past due | Retail Loans | Auto loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans		6,083.8				5,738.3
31 to 90 days past due | Retail Loans | Personal loans/Credit card
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans		24,446.2				20,871.1
31 to 90 days past due | Retail Loans | Retail business banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans		12,571.8				21,241
31 to 90 days past due | Retail Loans | Commercial vehicle and construction equipment finance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans		19,351.4				15,089.3
31 to 90 days past due | Retail Loans | Housing loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans		37,025.6				3,916
31 to 90 days past due | Retail Loans | Other Retail
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans		26,479				30,007.7
31 to 90 days past due | Wholesale loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans		35,202.1				3,905
Non-accrual/ 91 days or more past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans		327,443.9		3,929		200,708.8
Non-accrual/ 91 days or more past due | Retail Loans | Auto loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans		14,998				15,941.6
Non-accrual/ 91 days or more past due | Retail Loans | Personal loans/Credit card
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans		25,466.5				22,770.1
Non-accrual/ 91 days or more past due | Retail Loans | Retail business banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans		53,355.4				43,937.8
Non-accrual/ 91 days or more past due | Retail Loans | Commercial vehicle and construction equipment finance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans		21,563.6				21,823.8
Non-accrual/ 91 days or more past due | Retail Loans | Housing loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans		43,712.7				5,900.3
Non-accrual/ 91 days or more past due | Retail Loans | Other Retail
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans		61,520				56,822.9
Non-accrual/ 91 days or more past due | Wholesale loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans		106,827.7				33,512.3
Total current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	[2]	26,304,443.6	[1]	$ 315,628	[1]	17,116,615.2	[3]
Total current | Retail Loans | Auto loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	[2]	1,357,441.3	[1]			1,199,417.7	[3]
Total current | Retail Loans | Personal loans/Credit card
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	[2]	3,069,334	[1]			2,739,187.3	[3]
Total current | Retail Loans | Retail business banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	[2]	4,141,909	[1]			3,313,446.4	[3]
Total current | Retail Loans | Commercial vehicle and construction equipment finance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	[2]	1,578,687.9	[1]			1,248,974.7	[3]
Total current | Retail Loans | Housing loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	[2]	6,912,429.7	[1]			1,011,085.3	[3]
Total current | Retail Loans | Other Retail
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	[2]	2,184,032.2	[1]			1,730,409	[3]
Total current | Wholesale loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	[2]	₨ 7,060,609.5	[1]			₨ 5,874,094.8	[3]
[1]Includes crop-related agricultural loans with days past due less than 366 as they are not considered as non-performing of Rs. 35.4 billion.[2]Loans up to 30 days past due are considered current.[3]Includes crop-related agricultural loans with days past due less than 366 as they are not considered as non-performing of Rs. 31.8 billion.

Loan Delinquency and Non-Accr_2

Loan Delinquency and Non-Accrual Loans (Parenthetical) (Detail) ₨ in Millions, $ in Millions	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	₨ 26,793,047.4	$ 321,490.8	₨ 17,418,092.4
Current loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable period past due	30 days	30 days	30 days
Agricultural Loan | Not Impaired or Less Than 366 days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	₨ 35,400		₨ 31,800

Summary of Gross Loans Originat

Summary of Gross Loans Origination and Internally Assigned Credit Risk Ratings (Detail) ₨ in Millions, $ in Millions	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)
Retail loans
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	₨ 1,517,172.2	$ 18,204.6	₨ 510,417.8
Before four years	737,926.2	8,854.4	320,947.2
Before three years	1,063,060.5	12,755.7	507,416.1
Before two years	2,153,627.5	25,841.5	775,037.4
Before one years	3,726,120.8	44,709.9	1,818,009
Current	5,536,503.1	66,432.7	3,600,410.4
Revolving Loans	4,489,936	53,874.9	3,658,893.5
Revolving loans converted to term loans	366,061.8	4,392.4	315,448.9
Total	19,590,408.1	235,066.1	11,506,580.3
Retail loans | Write off
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	18,759.7	225.1
Before four years	14,440.6	173.3
Before three years	8,618.8	103.4
Before two years	16,233.9	194.8
Before one years	24,209.1	290.5
Current	3,632.3	43.6
Revolving Loans	25,837.7	310
Revolving loans converted to term loans	13,679.9	164.1
Total	125,412	1,504.8
Retail loans | Auto loans
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	17,086.4		15,517.1
Before four years	42,112.7		39,749.6
Before three years	88,862.3		94,007.2
Before two years	201,625.1		163,319
Before one years	402,140.9		310,066.9
Current	541,384.9		526,442.7
Revolving Loans	85,310.8		71,995.1
Revolving loans converted to term loans	0		0
Total	1,378,523.1		1,221,097.6
Retail loans | Auto loans | Write off
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	1,376.8
Before four years	1,913.2
Before three years	1,683.1
Before two years	1,835.8
Before one years	1,688.5
Current	150.7
Revolving Loans	0
Revolving loans converted to term loans	0
Total	8,648.1
Retail loans | Personal loans/Credit card
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	4,925.6		2,778
Before four years	29,598.6		22,113.3
Before three years	64,272.4		89,549.8
Before two years	240,817.4		158,430.1
Before one years	648,273.2		494,010.7
Current	1,195,151.2		1,209,127.8
Revolving Loans	570,146.5		491,369.9
Revolving loans converted to term loans	366,061.8		315,448.9
Total	3,119,246.7		2,782,828.5
Retail loans | Personal loans/Credit card | Write off
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	1,681.8
Before four years	4,635.9
Before three years	3,526.2
Before two years	10,050.8
Before one years	17,073.2
Current	2,838.5
Revolving Loans	21,307.8
Revolving loans converted to term loans	13,679.9
Total	74,794.1
Retail loans | Retail business banking
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	96,212.4		80,434.7
Before four years	64,673.1		61,911.5
Before three years	111,742.4		97,219.4
Before two years	319,787.1		189,834.9
Before one years	528,704.6		413,863.3
Current	701,737.8		600,365.7
Revolving Loans	2,384,978.8		1,934,995.7
Revolving loans converted to term loans	0		0
Total	4,207,836.2		3,378,625.2
Retail loans | Retail business banking | Write off
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	1,163.3
Before four years	298.8
Before three years	138.6
Before two years	19.7
Before one years	0.2
Current	0
Revolving Loans	9.5
Revolving loans converted to term loans	0
Total	1,630.1
Retail loans | Commercial vehicle and construction equipment finance
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	12,612.6		4,379.3
Before four years	17,986.3		22,200.6
Before three years	36,439.4		53,522
Before two years	159,942.5		97,469.8
Before one years	461,582.2		280,514.9
Current	723,662		630,169.3
Revolving Loans	207,377.9		197,631.9
Revolving loans converted to term loans	0		0
Total	1,619,602.9		1,285,887.8
Retail loans | Commercial vehicle and construction equipment finance | Write off
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	1,547.1
Before four years	2,379.5
Before three years	1,597.7
Before two years	2,231.2
Before one years	1,935
Current	104.3
Revolving Loans	1.3
Revolving loans converted to term loans	0
Total	9,796.1
Retail loans | Housing loans
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	1,373,409.5		398,743.8
Before four years	572,124.7		161,654
Before three years	741,491.1		143,395.8
Before two years	1,175,303.7		120,395
Before one years	1,480,508.1		167,253.7
Current	1,650,330.9		29,459.3
Revolving Loans	0		0
Revolving loans converted to term loans	0		0
Total	6,993,168		1,020,901.6
Retail loans | Housing loans | Write off
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	11,133.4
Before four years	759.5
Before three years	105.6
Before two years	7.5
Before one years	7.2
Current	0
Revolving Loans	0
Revolving loans converted to term loans	0
Total	12,013.2
Retail loans | Other retail loans
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	12,925.7		8,564.9
Before four years	11,430.8		13,318.2
Before three years	20,252.9		29,721.9
Before two years	56,151.7		45,588.6
Before one years	204,911.8		152,299.5
Current	724,236.3		604,845.6
Revolving Loans	1,242,122		962,900.9
Revolving loans converted to term loans	0		0
Total	2,272,031.2		1,817,239.6
Retail loans | Other retail loans | Write off
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	1,857.3
Before four years	4,453.7
Before three years	1,567.6
Before two years	2,088.9
Before one years	3,505
Current	538.8
Revolving Loans	4,519.1
Revolving loans converted to term loans	0
Total	18,530.4
Retail loans | Performing | Auto loans
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	15,314.7		14,387.2
Before four years	40,203.8		37,425.2
Before three years	86,953.7		90,148.4
Before two years	198,895.3		160,443.6
Before one years	398,936.3		308,076.9
Current	540,605.2		525,693.8
Revolving Loans	82,616.1		68,980.9
Revolving loans converted to term loans	0		0
Total	1,363,525.1		1,205,156
Retail loans | Performing | Personal loans/Credit card
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	4,198.8		2,431.4
Before four years	28,112.1		20,673.2
Before three years	62,604.2		86,038.7
Before two years	237,689.5		155,911.2
Before one years	642,360.7		490,598.8
Current	1,192,606.3		1,206,873.5
Revolving Loans	560,472.3		482,500.3
Revolving loans converted to term loans	365,736.3		315,031.3
Total	3,093,780.2		2,760,058.4
Retail loans | Performing | Retail business banking
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	88,129		75,583.1
Before four years	62,739.9		58,914.7
Before three years	108,288.3		94,372.2
Before two years	317,668.3		185,698.6
Before one years	527,853.5		412,305
Current	701,602.8		600,147.3
Revolving Loans	2,348,199		1,907,666.5
Revolving loans converted to term loans	0		0
Total	4,154,480.8		3,334,687.4
Retail loans | Performing | Commercial vehicle and construction equipment finance
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	9,984.2		3,981.3
Before four years	16,357.7		19,618.5
Before three years	33,797.5		49,030.6
Before two years	156,354		92,773.8
Before one years	456,722.6		277,461.6
Current	722,457.1		629,405.5
Revolving Loans	202,366.2		191,792.7
Revolving loans converted to term loans	0		0
Total	1,598,039.3		1,264,064
Retail loans | Performing | Housing loans
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	1,351,187.2		394,712.3
Before four years	565,617.9		160,447.9
Before three years	735,921.2		143,037
Before two years	1,170,433.9		120,214.8
Before one years	1,476,703.5		167,130.4
Current	1,649,591.6		29,458.9
Revolving Loans	0		0
Revolving loans converted to term loans	0		0
Total	6,949,455.3		1,015,001.3
Retail loans | Performing | Other retail loans
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	9,040.5		5,564.3
Before four years	9,538.8		10,063.3
Before three years	18,091.4		18,382
Before two years	53,746.1		42,416.7
Before one years	200,858.5		150,038.1
Current	721,107.1		603,873.8
Revolving Loans	1,198,128.8		930,078.5
Revolving loans converted to term loans	0		0
Total	2,210,511.2		1,760,416.7
Retail loans | Non-performing | Auto loans
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	1,771.7		1,129.9
Before four years	1,908.9		2,324.4
Before three years	1,908.6		3,858.8
Before two years	2,729.8		2,875.4
Before one years	3,204.6		1,990
Current	779.7		748.9
Revolving Loans	2,694.7		3,014.2
Revolving loans converted to term loans	0		0
Total	14,998		15,941.6
Retail loans | Non-performing | Personal loans/Credit card
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	726.8		346.6
Before four years	1,486.5		1,440.1
Before three years	1,668.2		3,511.1
Before two years	3,127.9		2,518.9
Before one years	5,912.5		3,411.9
Current	2,544.9		2,254.3
Revolving Loans	9,674.2		8,869.6
Revolving loans converted to term loans	325.5		417.6
Total	25,466.5		22,770.1
Retail loans | Non-performing | Retail business banking
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	8,083.4		4,851.6
Before four years	1,933.2		2,996.8
Before three years	3,454.1		2,847.2
Before two years	2,118.8		4,136.3
Before one years	851.1		1,558.3
Current	135		218.4
Revolving Loans	36,779.8		27,329.2
Revolving loans converted to term loans	0		0
Total	53,355.4		43,937.8
Retail loans | Non-performing | Commercial vehicle and construction equipment finance
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	2,628.4		398
Before four years	1,628.6		2,582.1
Before three years	2,641.9		4,491.4
Before two years	3,588.5		4,696
Before one years	4,859.6		3,053.3
Current	1,204.9		763.8
Revolving Loans	5,011.7		5,839.2
Revolving loans converted to term loans	0		0
Total	21,563.6		21,823.8
Retail loans | Non-performing | Housing loans
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	22,222.3		4,031.5
Before four years	6,506.8		1,206.1
Before three years	5,569.9		358.8
Before two years	4,869.8		180.2
Before one years	3,804.6		123.3
Current	739.3		0.4
Revolving Loans	0		0
Revolving loans converted to term loans	0		0
Total	43,712.7		5,900.3
Retail loans | Non-performing | Other retail loans
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	3,885.2		3,000.6
Before four years	1,892		3,254.9
Before three years	2,161.5		11,339.9
Before two years	2,405.6		3,171.9
Before one years	4,053.3		2,261.4
Current	3,129.2		971.8
Revolving Loans	43,993.2		32,822.4
Revolving loans converted to term loans	0		0
Total	61,520		56,822.9
Wholesale loans
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	246,913.8	2,962.7	137,178.9
Before four years	268,724.2	3,224.4	138,901.5
Before three years	592,298.3	7,107	321,892.8
Before two years	980,330.6	11,763	712,836.2
Before one years	1,222,234.9	14,665.6	1,257,010.8
Current	2,090,544	25,084.5	1,472,089.3
Revolving Loans	1,801,593.5	21,617.5	1,871,602.6
Total	7,202,639.3	86,424.7	5,911,512.1
Wholesale loans | Write off
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	2,585	31
Before four years	264.3	3.2
Before three years	0	0
Before two years	0	0
Before one years	481.5	5.8
Current	0	0
Revolving Loans	244.4	2.9
Total	3,575.2	$ 42.9
Wholesale loans | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	186,460.1		130,723.1
Before four years	264,241.1		135,400.3
Before three years	560,195.2		321,191
Before two years	957,023.5		708,309
Before one years	1,200,992		1,244,766.9
Current	2,071,787.5		1,471,254.9
Revolving Loans	1,773,221.5		1,841,015.5
Total	7,013,920.9		5,852,660.7
Wholesale loans | Labelled
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	14,723.3		2,625.3
Before four years	757.2		1,586.9
Before three years	17,488.3		635.7
Before two years	14,588.1		4,200.8
Before one years	16,225		5,946.5
Current	11,623.4		795.3
Revolving Loans	6,485.4		9,548.6
Total	81,890.7		25,339.1
Wholesale loans | Non-performing
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	45,730.4		3,830.5
Before four years	3,725.9		1,914.3
Before three years	14,614.8		66.1
Before two years	8,719		326.4
Before one years	5,017.9		6,297.4
Current	7,133.1		39.1
Revolving Loans	21,886.6		21,038.5
Total	₨ 106,827.7		₨ 33,512.3

Non-performing Loans (Detail)

Non-performing Loans (Detail) ₨ in Millions, $ in Millions	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-performing loans	₨ 327,443.9	$ 3,929	₨ 200,708.8
Consumer Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-performing loans	68,976.4	827.7	34,684.8
Real Estate & Property Services
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-performing loans	65,195.3	782.3
Agri Production—Food
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-performing loans	30,493.3	365.9	28,222.2
Retail Trade
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-performing loans			15,044.4
Agri Allied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-performing loans			13,426.1
Road Transportion
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-performing loans			11,505
Consumer services
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-performing loans			10,031.1
Others (none greater than 5% of non-performing loans)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-performing loans	₨ 162,778.9	$ 1,953.1	₨ 87,795.2

Summary Information Relating to

Summary Information Relating to Non-performing Loans (Detail) Loans (Detail) ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)	Mar. 31, 2022 INR (₨)
Gross Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income recognized on non-performing loans	₨ 9,675.9	$ 116.1	₨ 7,738	₨ 11,881

Allowance for Credit Losses (De

Allowance for Credit Losses (Detail) ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2024 INR (₨)		Mar. 31, 2024 USD ($)		Mar. 31, 2023 INR (₨)		Mar. 31, 2022 INR (₨)		Mar. 31, 2024 USD ($)
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit losses, beginning of the period	₨ 365,164.5		$ 4,381.6		₨ 372,671.8		₨ 343,528.7
Allowance for credit losses on PCD Loans at acquisition	39,415.2		472.9
Write-offs	(128,987.2)		(1,547.7)		(137,863.7)		(134,017.8)
Net allowance for credit losses	181,754	[1]	2,180.9	[1]	130,356.4	[2]	163,160.9	[3]
Allowance for credit losses, end of the period	457,346.5		$ 5,487.7		365,164.5		372,671.8
Allowance for credit losses:
Allowance individually evaluated for impairment	71,735.4				31,696.6		38,454.1		$ 860.7
Allowance collectively evaluated for impairment	385,611.1				333,467.9		334,217.7		4,627
Loans:
Loans individually evaluated for impairment	110,714.5				37,061.8		44,738.1		1,328.4
Loans collectively evaluated for impairment	26,682,332.9				17,381,030.6		14,364,805.9		$ 320,162.4
Auto loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit losses, beginning of the period	33,835.5				41,769.4		39,396.1
Allowance for credit losses on PCD Loans at acquisition	0
Write-offs	(8,648.1)				(10,456)		(19,376.9)
Net allowance for credit losses	4,761.5	[1]			2,522.1	[2]	21,750.2	[3]
Allowance for credit losses, end of the period	29,948.9				33,835.5		41,769.4
Allowance for credit losses:
Allowance individually evaluated for impairment	8				4.6		18.4
Allowance collectively evaluated for impairment	29,940.9				33,830.9		41,751
Loans:
Loans individually evaluated for impairment	8				16.4		31.5
Loans collectively evaluated for impairment	1,378,515.1				1,221,081.2		1,042,761.5
Personal loans/Credit card
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit losses, beginning of the period	99,634.4				111,566.4		110,081
Allowance for credit losses on PCD Loans at acquisition	0
Write-offs	(74,794.1)				(88,744.9)		(74,500.8)
Net allowance for credit losses	92,159.3	[1]			76,812.9	[2]	75,986.2	[3]
Allowance for credit losses, end of the period	116,999.6				99,634.4		111,566.4
Allowance for credit losses:
Allowance individually evaluated for impairment	1				0		6.5
Allowance collectively evaluated for impairment	116,998.6				99,634.4		111,559.9
Loans:
Loans individually evaluated for impairment	1				0.8		29.4
Loans collectively evaluated for impairment	3,119,245.7				2,782,827.7		2,341,942.4
Retail business banking
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit losses, beginning of the period	63,974.8				49,055		42,288.4
Allowance for credit losses on PCD Loans at acquisition	0
Write-offs	(1,630.1)				(3,987.8)		(3,027.7)
Net allowance for credit losses	12,955.8	[1]			18,907.6	[2]	9,794.3	[3]
Allowance for credit losses, end of the period	75,300.5				63,974.8		49,055
Allowance for credit losses:
Allowance individually evaluated for impairment	2,498.3				2,320.3		2,651.4
Allowance collectively evaluated for impairment	72,802.2				61,654.5		46,403.6
Loans:
Loans individually evaluated for impairment	2,924.9				2,782		2,651.4
Loans collectively evaluated for impairment	4,204,911.3				3,375,843.2		2,614,435.7
Commercial vehicle and construction equipment finance
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit losses, beginning of the period	31,130.6				31,750.9		26,356.7
Allowance for credit losses on PCD Loans at acquisition	0
Write-offs	(9,796.1)				(15,270.1)		(16,592)
Net allowance for credit losses	10,761.6	[1]			14,649.8	[2]	21,986.2	[3]
Allowance for credit losses, end of the period	32,096.1				31,130.6		31,750.9
Allowance for credit losses:
Allowance individually evaluated for impairment	184.4				15		65.8
Allowance collectively evaluated for impairment	31,911.7				31,115.6		31,685.1
Loans:
Loans individually evaluated for impairment	184.4				290.8		66.3
Loans collectively evaluated for impairment	1,619,418.5				1,285,597		950,999.7
Housing loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit losses, beginning of the period	3,269.9				2,692.2		4,578
Allowance for credit losses on PCD Loans at acquisition	2,927.9
Write-offs	(12,013.2)				(479)		(601.6)
Net allowance for credit losses	15,722.2	[1]			1,056.7	[2]	(1,284.2)	[3]
Allowance for credit losses, end of the period	9,906.8				3,269.9		2,692.2
Allowance for credit losses:
Allowance individually evaluated for impairment	0				0		0
Allowance collectively evaluated for impairment	9,906.8				3,269.9		2,692.2
Loans:
Loans individually evaluated for impairment	0				0		0
Loans collectively evaluated for impairment	6,993,168				1,020,901.6		830,882.4
Other retail
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit losses, beginning of the period	72,012.4				61,437		49,229.2
Allowance for credit losses on PCD Loans at acquisition	0
Write-offs	(18,530.4)				(15,769.9)		(17,567.4)
Net allowance for credit losses	26,971.8	[1]			26,345.3	[2]	29,775.2	[3]
Allowance for credit losses, end of the period	80,453.8				72,012.4		61,437
Allowance for credit losses:
Allowance individually evaluated for impairment	156.8				92.1		92.3
Allowance collectively evaluated for impairment	80,297				71,920.3		61,344.7
Loans:
Loans individually evaluated for impairment	156.8				92.3		126.6
Loans collectively evaluated for impairment	2,271,874.4				1,817,147.3		1,526,607.8
Wholesale loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit losses, beginning of the period	61,306.9				74,400.9		71,599.3
Allowance for credit losses on PCD Loans at acquisition	36,487.3
Write-offs	(3,575.2)				(3,156)		(2,351.4)
Net allowance for credit losses	(18,421.8)	[1]			(9,938)	[2]	5,153	[3]
Allowance for credit losses, end of the period	112,640.8				61,306.9		74,400.9
Allowance for credit losses:
Allowance individually evaluated for impairment	68,886.9				29,264.6		35,619.7
Allowance collectively evaluated for impairment	43,753.9				32,042.3		38,781.2
Loans:
Loans individually evaluated for impairment	107,439.4				33,879.5		41,832.9
Loans collectively evaluated for impairment	₨ 7,095,199.9				₨ 5,877,632.6		₨ 5,057,176.4
[1]Net allowances for credit losses charged to expense does not include the recoveries against write-off cases amounting to Rs. 48,690.9 million (US$ 584.3 million). Recoveries from retail loans is Rs. 44,432.2 million and from wholesale loans is Rs. 4,258.7 million.[2]Net allowances for credit losses charged to expense does not include the recoveries against write-off cases amounting to Rs. 56,142.6 million. Recoveries from retail loans is Rs. 53,374.2 million and from wholesale loans is Rs. 2,768.4 million.[3]Net allowances for credit losses charged to expense does not include the recoveries against write-off cases amounting to Rs.36,181.4 million. Recoveries from retail loans is Rs.35,385.3 million and from wholesale loans is Rs.796.1 million.

Allowance for Credit Losses (Pa

Allowance for Credit Losses (Parenthetical) (Detail) ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)	Mar. 31, 2022 INR (₨)
Financing Receivable, Allowance for Credit Loss [Line Items]
Cash recoveries, recoveries against write off cases	₨ 48,690.9	$ 584.3	₨ 56,142.6	₨ 36,181.4
Retail loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Recoveries of loans	44,432.2		53,374.2	35,385.3
Wholesale loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Recoveries of loans	₨ 4,258.7		₨ 2,768.4	₨ 796.1

Interest on Loans by Facility (

Interest on Loans by Facility (Detail) ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)	Mar. 31, 2022 INR (₨)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest on loans	₨ 2,194,525.5	$ 26,332.2	₨ 1,351,818	₨ 1,057,925.6
Wholesale loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest on loans	555,377.8	6,664	363,842.1	250,779.5
Retail loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest on loans	1,617,982.2	19,414.2	₨ 987,975.9	₨ 807,146.1
Other loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest on loans	₨ 21,165.5	$ 254

Concentrations of Credit Risk_2

Concentrations of Credit Risk (Detail) ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)	Mar. 31, 2024 USD ($)
Concentration Risk [Line Items]
Gross loans	₨ 26,793,047.4		₨ 17,418,092.4
Fair value of credit substitutes	131,486.9		503,187.8	$ 1,577.7
Non-funded exposure	2,103,968		1,750,449.2
Total Exposure	₨ 29,028,502.3	$ 348,314.2	₨ 19,671,729.4
Lender Concentration Risk | Concentration of Credit Risk by Industry
Concentration Risk [Line Items]
%	100%	100%	100%
Consumer Loans
Concentration Risk [Line Items]
Gross loans	₨ 10,191,521.5		₨ 4,410,346.6
Fair value of credit substitutes	0		0
Non-funded exposure	468.1		2,550.8
Total Exposure	₨ 10,191,989.6	$ 122,294.1	₨ 4,412,897.4
Consumer Loans | Lender Concentration Risk | Concentration of Credit Risk by Industry
Concentration Risk [Line Items]
%	35.10%	35.10%	22.40%
Retail Trade
Concentration Risk [Line Items]
Gross loans	₨ 1,085,962.9		₨ 973,274.3
Fair value of credit substitutes	0		0
Non-funded exposure	56,822.6		36,013.4
Total Exposure	₨ 1,142,785.5	$ 13,712.3	₨ 1,009,287.7
Retail Trade | Lender Concentration Risk | Concentration of Credit Risk by Industry
Concentration Risk [Line Items]
%	3.90%	3.90%	5.10%
Power
Concentration Risk [Line Items]
Gross loans	₨ 770,473.1		₨ 695,716.5
Fair value of credit substitutes	37,706.9		64,805.5
Non-funded exposure	63,452.3		45,576.3
Total Exposure	₨ 871,632.3	$ 10,458.8	₨ 806,098.3
Power | Lender Concentration Risk | Concentration of Credit Risk by Industry
Concentration Risk [Line Items]
%	3%	3%	4.10%
NBFC
Concentration Risk [Line Items]
Gross loans	₨ 1,725,559.7		₨ 690,783.9
Fair value of credit substitutes	20,585.6		91,595.9
Non-funded exposure	5,153.7		15,995.5
Total Exposure	₨ 1,751,299	$ 21,013.9	₨ 798,375.3
NBFC | Lender Concentration Risk | Concentration of Credit Risk by Industry
Concentration Risk [Line Items]
%	6%	6%	4.10%
Financial Institutions
Concentration Risk [Line Items]
Gross loans			₨ 659,117.5
Fair value of credit substitutes			72,068.3
Non-funded exposure			4,435.4
Total Exposure			₨ 735,621.2
Financial Institutions | Lender Concentration Risk | Concentration of Credit Risk by Industry
Concentration Risk [Line Items]
%			3.70%
Consumer Services
Concentration Risk [Line Items]
Gross loans	₨ 860,297.1		₨ 581,272.1
Fair value of credit substitutes	0		3,545.4
Non-funded exposure	35,933.7		123,464.7
Total Exposure	₨ 896,230.8	$ 10,753.9	₨ 708,282.2
Consumer Services | Lender Concentration Risk | Concentration of Credit Risk by Industry
Concentration Risk [Line Items]
%	3.10%	3.10%	3.60%
Food and Beverage
Concentration Risk [Line Items]
Gross loans	₨ 712,895.6		₨ 566,172.9
Fair value of credit substitutes	1,405.1		1,419.2
Non-funded exposure	59,163.2		49,084.4
Total Exposure	₨ 773,463.9	$ 9,280.8	₨ 616,676.5
Food and Beverage | Lender Concentration Risk | Concentration of Credit Risk by Industry
Concentration Risk [Line Items]
%	2.70%	2.70%	3.10%
Road Transportation
Concentration Risk [Line Items]
Gross loans	₨ 741,738.6		₨ 568,414.2
Fair value of credit substitutes	0		0
Non-funded exposure	11,160.3		12,512.4
Total Exposure	₨ 752,898.9	$ 9,034.1	₨ 580,926.6
Road Transportation | Lender Concentration Risk | Concentration of Credit Risk by Industry
Concentration Risk [Line Items]
%	2.60%	2.60%	3%
Coal & Petroleum Products
Concentration Risk [Line Items]
Gross loans			₨ 353,329.8
Fair value of credit substitutes			115,279.8
Non-funded exposure			102,771.3
Total Exposure			₨ 571,380.9
Coal & Petroleum Products | Lender Concentration Risk | Concentration of Credit Risk by Industry
Concentration Risk [Line Items]
%			2.90%
Wholesale Trade—Non Industrial
Concentration Risk [Line Items]
Gross loans			₨ 530,057.5
Fair value of credit substitutes			1,988.8
Non-funded exposure			31,887
Total Exposure			₨ 563,933.3
Wholesale Trade—Non Industrial | Lender Concentration Risk | Concentration of Credit Risk by Industry
Concentration Risk [Line Items]
%			2.90%
Automobile & Auto Ancillary
Concentration Risk [Line Items]
Gross loans			₨ 483,658.4
Fair value of credit substitutes			17,656.8
Non-funded exposure			38,921.4
Total Exposure			₨ 540,236.6
Automobile & Auto Ancillary | Lender Concentration Risk | Concentration of Credit Risk by Industry
Concentration Risk [Line Items]
%			2.70%
Real Estate & Property Services
Concentration Risk [Line Items]
Gross loans	₨ 1,070,220.3		₨ 458,906.6
Fair value of credit substitutes	3,495		4,691.4
Non-funded exposure	57,556.4		52,228.7
Total Exposure	₨ 1,131,271.7	$ 13,574.2	₨ 515,826.7
Real Estate & Property Services | Lender Concentration Risk | Concentration of Credit Risk by Industry
Concentration Risk [Line Items]
%	3.90%	3.90%	2.60%
Wholesale Trade—Industrial
Concentration Risk [Line Items]
Gross loans			₨ 421,900.9
Fair value of credit substitutes			0
Non-funded exposure			70,853.6
Total Exposure			₨ 492,754.5
Wholesale Trade—Industrial | Lender Concentration Risk | Concentration of Credit Risk by Industry
Concentration Risk [Line Items]
%			2.50%
Infrastructure Development
Concentration Risk [Line Items]
Gross loans	₨ 450,183.2		₨ 284,690.7
Fair value of credit substitutes	6,716		15,220.2
Non-funded exposure	336,982.5		170,452.2
Total Exposure	₨ 793,881.7	$ 9,525.8	₨ 470,363.1
Infrastructure Development | Lender Concentration Risk | Concentration of Credit Risk by Industry
Concentration Risk [Line Items]
%	2.70%	2.70%	2.40%
Engineering
Concentration Risk [Line Items]
Gross loans			₨ 300,745.5
Fair value of credit substitutes			5,596
Non-funded exposure			131,956.5
Total Exposure			₨ 438,298
Engineering | Lender Concentration Risk | Concentration of Credit Risk by Industry
Concentration Risk [Line Items]
%			2.20%
Agri—Allied
Concentration Risk [Line Items]
Gross loans			₨ 431,581.2
Fair value of credit substitutes			0
Non-funded exposure			2,701.2
Total Exposure			₨ 434,282.4
Agri—Allied | Lender Concentration Risk | Concentration of Credit Risk by Industry
Concentration Risk [Line Items]
%			2.20%
Iron and Steel
Concentration Risk [Line Items]
Gross loans			₨ 360,021.9
Fair value of credit substitutes			12,231.9
Non-funded exposure			61,224.3
Total Exposure			₨ 433,478.1
Iron and Steel | Lender Concentration Risk | Concentration of Credit Risk by Industry
Concentration Risk [Line Items]
%			2.20%
Textiles & Garments
Concentration Risk [Line Items]
Gross loans			₨ 390,883
Fair value of credit substitutes			4,984.5
Non-funded exposure			34,729.1
Total Exposure			₨ 430,596.6
Textiles & Garments | Lender Concentration Risk | Concentration of Credit Risk by Industry
Concentration Risk [Line Items]
%			2.20%
Telecom
Concentration Risk [Line Items]
Gross loans			₨ 365,112.3
Fair value of credit substitutes			0
Non-funded exposure			42,221.1
Total Exposure			₨ 407,333.4
Telecom | Lender Concentration Risk | Concentration of Credit Risk by Industry
Concentration Risk [Line Items]
%			2.10%
Agri Production—Food
Concentration Risk [Line Items]
Gross loans			₨ 401,720.3
Fair value of credit substitutes			0
Non-funded exposure			1,040.5
Total Exposure			₨ 402,760.8
Agri Production—Food | Lender Concentration Risk | Concentration of Credit Risk by Industry
Concentration Risk [Line Items]
%			2%
Others (none greater than 2%)
Concentration Risk [Line Items]
Gross loans	₨ 9,184,195.4		₨ 3,490,386.3
Fair value of credit substitutes	61,578.3		92,104.1
Non-funded exposure	1,477,275.2		719,829.4
Total Exposure	₨ 10,723,048.9	$ 128,666.3	₨ 4,302,319.8
Others (none greater than 2%) | Lender Concentration Risk | Concentration of Credit Risk by Industry
Concentration Risk [Line Items]
%	37%	37%	22%

Exposures to Ten Largest Borrow

Exposures to Ten Largest Borrowers Computed as per RBI Guidelines, Based on Higher of Outstanding Balance or Limit on Loans, Investments (Including Credit Substitutes) and Non-Funded Exposures (Detail) ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)
Concentration Risk [Line Items]
Total Exposure	₨ 29,028,502.3	$ 348,314.2	₨ 19,671,729.4
Borrower 1
Concentration Risk [Line Items]
Total Exposure	301,241.8	3,614.6	284,002.5
Borrower 1 | Funded Exposure
Concentration Risk [Line Items]
Total Exposure	301,241.8		284,002.5
Borrower 1 | Non-Funded Exposure
Concentration Risk [Line Items]
Total Exposure	0		0
Borrower 2
Concentration Risk [Line Items]
Total Exposure	278,173.5	3,337.8	222,101.6
Borrower 2 | Funded Exposure
Concentration Risk [Line Items]
Total Exposure	276,973.5		220,901.6
Borrower 2 | Non-Funded Exposure
Concentration Risk [Line Items]
Total Exposure	1,200		1,200
Borrower 3
Concentration Risk [Line Items]
Total Exposure	220,801	2,649.4	205,801
Borrower 3 | Funded Exposure
Concentration Risk [Line Items]
Total Exposure	220,801		205,801
Borrower 3 | Non-Funded Exposure
Concentration Risk [Line Items]
Total Exposure	0		0
Borrower 4
Concentration Risk [Line Items]
Total Exposure	214,797.5	2,577.4	192,489.2
Borrower 4 | Funded Exposure
Concentration Risk [Line Items]
Total Exposure	214,755		80,344.5
Borrower 4 | Non-Funded Exposure
Concentration Risk [Line Items]
Total Exposure	42.5		112,144.7
Borrower 5
Concentration Risk [Line Items]
Total Exposure	212,970.4	2,555.4	185,299
Borrower 5 | Funded Exposure
Concentration Risk [Line Items]
Total Exposure	212,970.4		185,299
Borrower 5 | Non-Funded Exposure
Concentration Risk [Line Items]
Total Exposure	0		0
Borrower 6
Concentration Risk [Line Items]
Total Exposure	188,163.3	2,257.8	176,061.5
Borrower 6 | Funded Exposure
Concentration Risk [Line Items]
Total Exposure	187,963.3		154,296.7
Borrower 6 | Non-Funded Exposure
Concentration Risk [Line Items]
Total Exposure	200		21,764.8
Borrower 7
Concentration Risk [Line Items]
Total Exposure	175,028.1	2,100.2	155,625.7
Borrower 7 | Funded Exposure
Concentration Risk [Line Items]
Total Exposure	175,000		155,565.7
Borrower 7 | Non-Funded Exposure
Concentration Risk [Line Items]
Total Exposure	28.1		60
Borrower 8
Concentration Risk [Line Items]
Total Exposure	168,999.1	2,027.8	139,808.3
Borrower 8 | Funded Exposure
Concentration Risk [Line Items]
Total Exposure	163,105.7		139,808.3
Borrower 8 | Non-Funded Exposure
Concentration Risk [Line Items]
Total Exposure	5,893.4		0
Borrower 9
Concentration Risk [Line Items]
Total Exposure	160,539.2	1,926.3	127,590.3
Borrower 9 | Funded Exposure
Concentration Risk [Line Items]
Total Exposure	47,933.7		121,560
Borrower 9 | Non-Funded Exposure
Concentration Risk [Line Items]
Total Exposure	112,605.5		6,030.3
Borrower 10
Concentration Risk [Line Items]
Total Exposure	145,271	$ 1,743.1	127,549
Borrower 10 | Funded Exposure
Concentration Risk [Line Items]
Total Exposure	145,250		112,479
Borrower 10 | Non-Funded Exposure
Concentration Risk [Line Items]
Total Exposure	₨ 21		₨ 15,070

Property and Equipment - Additi

Property and Equipment - Additional Information (Detail) ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)	Mar. 31, 2022 INR (₨)
Property, Plant and Equipment [Line Items]
Depreciation and amortization	₨ 31,147.3	$ 373.7	₨ 23,489.7	₨ 16,816.9

Property and Equipment by Asset

Property and Equipment by Asset Category (Detail) ₨ in Millions, $ in Millions	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)
Property, Plant and Equipment [Line Items]
Land and premises	₨ 64,357.6	$ 772.2	₨ 25,501.3
Software and systems	73,561.3	882.7	56,092.8
Equipment and furniture	172,031.8	2,064.2	132,553.5
Property and equipment, at cost	309,950.7	3,719.1	214,147.6
Less: Accumulated depreciation	162,920.3	1,954.9	126,577.9
Property and equipment, net	₨ 147,030.4	$ 1,764.2	₨ 87,569.7

Future Amortization of Finite L

Future Amortization of Finite Lived Intangible Assets (Detail) - Mar. 31, 2024 ₨ in Millions, $ in Millions	INR (₨)	USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2025	₨ 21,827.1	$ 261.9
2026	19,843.8	238.1
2027	18,138.2	217.6
2028	16,298	195.6
2029	14,661.8	175.9
Thereafter	₨ 193,332	$ 2,319.8

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets - Additional Information (Detail) ₨ in Millions, $ in Millions

12 Months Ended

Mar. 19, 2024 INR (₨)

Mar. 19, 2024 USD ($)

Jul. 01, 2023 INR (₨)

Jul. 01, 2023 USD ($)

Mar. 31, 2024 INR (₨)

Mar. 31, 2024 USD ($)

Mar. 31, 2023 INR (₨)

Mar. 31, 2022 INR (₨)

Mar. 31, 2024 USD ($)

Jul. 01, 2023 USD ($)

Mar. 31, 2023 USD ($)

Mar. 31, 2022 USD ($)

Finite And Indefinite Lived Intangible Assets [Line Items]

Finite lived intangible assets amortization

₨ 21,201

$ 254.4

₨ 0

₨ 0

Good will written off related to sale of business unit

73,576.1

$ 882.9

Good willI mpairment Loss

0

Goodwill

1,629,510.3

₨ 74,937.9

₨ 74,937.9

$ 19,552.6

$ 899.3

$ 899.3

eHDFC [Member]

Finite And Indefinite Lived Intangible Assets [Line Items]

Goodwill

₨ 1,628,148.5

1,628,148.5

$ 19,536.2

$ 19,536.2

HDFC Credila Financial Services Limited [Member] | eHDFC [Member]

Finite And Indefinite Lived Intangible Assets [Line Items]

Good will written off related to sale of business unit

₨ 73,576.1

$ 882.9

₨ 73,576.1

$ 882.8

Depreciation And Amortization [Member]

Finite And Indefinite Lived Intangible Assets [Line Items]

Finite lived intangible assets amortization

₨ 21,201

Carrying Amount of Goodwill (De

Carrying Amount of Goodwill (Detail) ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)	Mar. 31, 2023 USD ($)
Goodwill [Line Items]
Begining	₨ 74,937.9	$ 899.3	₨ 74,937.9	$ 899.3
Goodwill on acquisition during the year	1,628,148.5	19,536.2
Less: Goodwill Derecognised on disposal during the year	73,576.1	882.9
Ending	1,629,510.3	$ 19,552.6	74,937.9	$ 899.3
Retail Banking [Member]
Goodwill [Line Items]
Begining	74,937.9		74,937.9
Goodwill on acquisition during the year	368,079.6
Less: Goodwill Derecognised on disposal during the year	0
Ending	443,017.5		74,937.9
Wholesale Banking [Member]
Goodwill [Line Items]
Begining	0		0
Goodwill on acquisition during the year	71,617.3
Less: Goodwill Derecognised on disposal during the year	0
Ending	71,617.3		0
Treasury Services [Member]
Goodwill [Line Items]
Begining	0		0
Goodwill on acquisition during the year	0
Less: Goodwill Derecognised on disposal during the year	0
Ending	0		0
Insurance Services [Member]
Goodwill [Line Items]
Begining	0		0
Goodwill on acquisition during the year	959,080
Less: Goodwill Derecognised on disposal during the year	0
Ending	959,080		0
Other Segments [Member]
Goodwill [Line Items]
Begining	0		0
Goodwill on acquisition during the year	229,371.6
Less: Goodwill Derecognised on disposal during the year	73,576.1
Ending	₨ 155,795.5		₨ 0

Intangible Assets, Net (Detail)

Intangible Assets, Net (Detail) ₨ in Millions, $ in Millions	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Jul. 01, 2023 INR (₨)	Mar. 31, 2023 INR (₨)
Finite And Indefinite Lived Intangible Assets [Line Items]
Intangible Assets	₨ 1,417,318.2	$ 17,006.5	₨ 1,434,818.1
Less: Accumulated amortization	21,201	254.4	0
Total intangible assets, net	1,396,117.2	16,752.1	1,434,818.1	₨ 0
Brand [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Intangible Assets	742,230.7	8,906.1	750,758.2
Investment management contract [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Intangible Assets	369,785.6	4,437.1	369,785.6
Value of business acquired [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Intangible Assets	221,738.5	2,660.6	221,738.5
Distribution network [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Intangible Assets	50,570.8	606.9	59,543.2
Customer Relationship [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Intangible Assets	29,874.9	358.4	29,874.9
Transferable Development Rights [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Intangible Assets	₨ 3,117.7	$ 37.4	₨ 3,117.7

Intangible Assets, Net (Parenth

Intangible Assets, Net (Parenthetical) (Detail) - 12 months ended Mar. 31, 2024 - HDFC Credila Financial Services Limited [Member] ₨ in Millions, $ in Millions	INR (₨)	USD ($)
Brand [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Indefinite lived intangible assets written off related to sale of business unit	₨ 8,527.5	$ 102.3
Distribution Service [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Indefinite lived intangible assets written off related to sale of business unit	₨ 8,972.4	$ 107.6

Other Assets (Detail)

Other Assets (Detail) ₨ in Millions, $ in Millions		Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)
Other Assets Disclosure [Line Items]
Security deposits for leased property		₨ 9,678.4	$ 116.1	₨ 6,461.8
Sundry accounts receivable		129,187.8	1,550.1	84,217.8
Advance tax (net of provision for taxes)		173,281.9	2,079.2	52,006.4
Advances		51,036.8	612.4	14,724.3
Prepaid expenses		9,484	113.8	4,757.4
Deposits/Margins paid		48,100.4	577.2	14,959
Derivatives (refer to note 25)		109,038.5	1,308.4	121,749.4
Placements with financial institutions		1,330,263.5	15,961.9	970,063.2
Receivable on account of trade date		295.5	3.5	8,442.2
ROU Assets		₨ 121,302.5	$ 1,455.5	₨ 89,989.3
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]		Total	Total	Total
Others	[1]	₨ 546,542	$ 6,558	₨ 129,380.8
Total		₨ 2,528,211.3	$ 30,336.1	₨ 1,496,751.6
[1]Others include equity securities and affiliates with carrying value amounting to Rs. 22,103.4 million and Rs. 317,593.5 million as of March 31, 2023 and March 31, 2024, respectively. Equity securities include non-marketable equity securities carried at cost of Rs. 2,640.8 million and Rs. 14,646.7 million as of March 31, 2023 and March 31, 2024, respectively. Unrealized gain/(loss) recognized in non-interest revenue–other, net amount to Rs. 7,160.1 million and Rs. 11,759.4 million for the fiscal years ended March 31, 2023 and March 31, 2024, respectively. Further, Others also includes reinsurance assets amounting to Rs. 105,661.6 million and deferred acquisition assets amounting to Rs. 60,531.9 million as of March 31, 2024.

Other Assets (Parenthetical) (D

Other Assets (Parenthetical) (Detail) ₨ in Millions, $ in Millions		12 Months Ended
		Mar. 31, 2024 INR (₨)	Mar. 31, 2023 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($)
Other Assets Disclosure [Line Items]
Other assets	[1]	₨ 546,542	₨ 129,380.8	$ 6,558
Unrealized gain/(loss) recognized in non-interest revenue–other, net		11,759.4	7,160.1
Deferred policy acquistion costs		60,531.9	0	$ 726.3	$ 0
Other Assets
Other Assets Disclosure [Line Items]
Reinsurance assets		105,661.6
Deferred policy acquistion costs		60,531.9
Equity securities
Other Assets Disclosure [Line Items]
Other assets		317,593.5	22,103.4
Equity securities | Non Marketable Equity Securities [Member]
Other Assets Disclosure [Line Items]
Other assets		₨ 14,646.7	₨ 2,640.8
[1]Others include equity securities and affiliates with carrying value amounting to Rs. 22,103.4 million and Rs. 317,593.5 million as of March 31, 2023 and March 31, 2024, respectively. Equity securities include non-marketable equity securities carried at cost of Rs. 2,640.8 million and Rs. 14,646.7 million as of March 31, 2023 and March 31, 2024, respectively. Unrealized gain/(loss) recognized in non-interest revenue–other, net amount to Rs. 7,160.1 million and Rs. 11,759.4 million for the fiscal years ended March 31, 2023 and March 31, 2024, respectively. Further, Others also includes reinsurance assets amounting to Rs. 105,661.6 million and deferred acquisition assets amounting to Rs. 60,531.9 million as of March 31, 2024.

Deposits - Additional Informati

Deposits - Additional Information (Detail) ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2024 INR (₨)	Mar. 31, 2023 INR (₨)	Mar. 31, 2024 USD ($)
Deposits From Banking Clients [Line Items]
Time deposits with residual maturity of one year or less	₨ 10,598,905.6	₨ 7,121,444.9	$ 127,176.7
Maturity of deposits	1 year		1 year
Time deposits	₨ 14,700,957.1	10,472,547.9	$ 176,397.4
Excess in time deposits	₨ 0.5	0.5
Maximum [Member]
Deposits From Banking Clients [Line Items]
Maturity of deposits	10 years		10 years
Deposit in excess of Rs. 500000
Deposits From Banking Clients [Line Items]
Time deposits	₨ 12,777,915.1	₨ 9,127,675.3

Deposits (Detail)

Deposits (Detail) ₨ in Millions, $ in Millions	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)
Interest-bearing:
Savings deposits	₨ 5,987,449.1	$ 71,843.6	₨ 5,624,911.4
Time deposits	14,700,957.1	176,397.4	10,472,547.9
Total interest-bearing deposits	20,688,406.2	248,241	16,097,459.3
Non-interest-bearing deposits	3,079,829.4	36,955	2,729,176.3
Total	₨ 23,768,235.6	$ 285,196	₨ 18,826,635.6

Deposits - Scheduled Maturities

Deposits - Scheduled Maturities for Total Time Deposits (Detail) ₨ in Millions, $ in Millions	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)
Due to mature in the fiscal year ending March 31:
2025	₨ 10,598,905.6	$ 127,176.7	₨ 7,121,444.9
2026	2,030,231.8	24,360.8
2027	972,634.2	11,670.7
2028	495,929	5,950.7
2029	365,318.4	4,383.5
Thereafter	237,938.1	2,855
Total	₨ 14,700,957.1	$ 176,397.4	₨ 10,472,547.9

Short-Term Borrowings (Detail)

Short-Term Borrowings (Detail) ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)	Mar. 31, 2024 USD ($)
Short-term Debt [Line Items]
Short-term borrowings	₨ 1,313,737.1		₨ 1,089,897.5	$ 15,763.6
Maximum amount outstanding	2,415,549.7	$ 28,984.3	1,154,282.6
Average amount outstanding	₨ 1,416,168.6	$ 16,992.7	₨ 870,879.3
Weighted average interest rate	6.90%		4%	6.90%
Borrowed in the call market
Short-term Debt [Line Items]
Short-term borrowings	₨ 50,356.7		₨ 14,359.5	$ 604.2
Term borrowings from institutions/banks
Short-term Debt [Line Items]
Short-term borrowings	1,028,262.6		735,131.5	12,338.2
Foreign currency borrowings
Short-term Debt [Line Items]
Short-term borrowings	200,685.2		320,695	2,408
Bills rediscounted
Short-term Debt [Line Items]
Short-term borrowings	₨ 34,432.6		₨ 19,711.5	$ 413.2

Long-Term Debt - Additional Inf

Long-Term Debt - Additional Information (Detail) ₨ in Millions, $ in Millions		12 Months Ended
		Mar. 31, 2024 INR (₨)	Mar. 31, 2023 INR (₨)	Mar. 31, 2024 USD ($)
Debt Instrument [Line Items]
Subordinated debt, debt raised during the year		₨ 20,000	₨ 200,000
Other long term debt, debt raised during the year		1,132,275.2	792,933.1
Perpetual debt, debt raised during the year		3,500	30,000
Other long-term debt	[1]	6,244,131.6	1,681,587.2	$ 74,923.6
Foreign currency borrowings
Debt Instrument [Line Items]
Other long-term debt		693,914	157,092.6
Functional currency borrowings
Debt Instrument [Line Items]
Other long-term debt		₨ 5,550,217.6	₨ 1,524,494.6
[1]Includes securities sold under repurchase agreements amounting to Rs. 90,200.0 million with a stated interest rate of 4.2% per annum for fiscal year ended March 31, 2023 and nil for the fiscal year ended March 31, 2024, under RBI long-term repo operation with a three-year maturity period. Increase in outstanding balance of Long-term debt – other as of March 31, 2024 is essentially on account of the Transaction (Refer note 3).

Long-Term Debt (Detail)

Long-Term Debt (Detail) ₨ in Millions, $ in Millions		Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)
Debt Instrument [Line Items]
Subordinated debt		₨ 407,531.3	$ 4,890	₨ 375,060
Others	[1]	6,244,131.6	74,923.6	1,681,587.2
Debt issuance cost		(2,890.9)	(34.7)	(2,210.8)
Total		₨ 6,648,772	$ 79,778.9	₨ 2,054,436.4
[1]Includes securities sold under repurchase agreements amounting to Rs. 90,200.0 million with a stated interest rate of 4.2% per annum for fiscal year ended March 31, 2023 and nil for the fiscal year ended March 31, 2024, under RBI long-term repo operation with a three-year maturity period. Increase in outstanding balance of Long-term debt – other as of March 31, 2024 is essentially on account of the Transaction (Refer note 3).

Long-Term Debt (Parenthetical)

Long-Term Debt (Parenthetical) (Detail) - INR (₨) ₨ in Millions	Mar. 31, 2024	Mar. 31, 2023
Debt Instrument [Line Items]
Securities sold under repurchase agreements	₨ 56,541	₨ 0
Securities sold under repurchase agreement
Debt Instrument [Line Items]
Securities sold under repurchase agreements		₨ 90,200
Interest rate		4.20%

Long-Term Debt and Related Cont

Long-Term Debt and Related Contractual Rates and Maturity Dates (Detail) ₨ in Millions, $ in Millions		12 Months Ended
		Mar. 31, 2024 INR (₨)	Mar. 31, 2023 INR (₨)	Mar. 31, 2024 USD ($)
Debt Instrument [Line Items]
Total		₨ 6,648,772	₨ 2,054,436.4	$ 79,778.9
Perpetual debt—(1)
Debt Instrument [Line Items]
Total		130,381.5
Subordinated debt | Subordinated debt (other than perpetual debt)
Debt Instrument [Line Items]
Total		276,600.6	248,983.8	3,318.9
Subordinated debt | Perpetual debt—(1)
Debt Instrument [Line Items]
Total		₨ 47,290.8	₨ 43,850.5	$ 567.4
Subordinated debt | Perpetual debt—(2)
Debt Instrument [Line Items]
Maturity /Call dates		2037	2027
Stated interest rates		3.70%	3.70%	3.70%
Total		₨ 83,090.7	₨ 81,724.6	$ 997
Subordinated debt | Minimum | Subordinated debt (other than perpetual debt)
Debt Instrument [Line Items]
Maturity /Call dates		2025	2024
Stated interest rates		6.67%	7.35%	6.67%
Subordinated debt | Minimum | Perpetual debt—(1)
Debt Instrument [Line Items]
Maturity /Call dates		2029	2024
Stated interest rates		7.55%	7.55%	7.55%
Subordinated debt | Maximum | Subordinated debt (other than perpetual debt)
Debt Instrument [Line Items]
Maturity /Call dates		2034	2033
Stated interest rates		9.70%	10.20%	9.70%
Subordinated debt | Maximum | Perpetual debt—(1)
Debt Instrument [Line Items]
Maturity /Call dates		2038	2030
Stated interest rates		9.40%	9.40%	9.40%
Others | Variable rate—(1)
Debt Instrument [Line Items]
Total	[1]	₨ 479,577.3	₨ 76,405.9	$ 5,754.5
Others | Variable rate—(2)
Debt Instrument [Line Items]
Total	[1]	1,235,079	148,813.9	14,819.8
Others | Fixed rate-(1)
Debt Instrument [Line Items]
Total	[1]	4,313,107.4	₨ 1,374,137.4	51,753.2
Others | Fixed rate-(2)
Debt Instrument [Line Items]
Maturity /Call dates	[1]		2024
Stated interest rates	[1]		2.58%
Total	[1]	₨ 214,026.2	₨ 80,520.3	$ 2,568.1
Others | Minimum | Variable rate—(1)
Debt Instrument [Line Items]
Maturity /Call dates	[1]	2026	2024
Stated interest rates	[1]	6.10%	1.40%	6.10%
Others | Minimum | Variable rate—(2)
Debt Instrument [Line Items]
Maturity /Call dates	[1]	2025	2024
Stated interest rates	[1]	6.21%	4.50%	6.21%
Others | Minimum | Fixed rate-(1)
Debt Instrument [Line Items]
Maturity /Call dates	[1]	2025	2024
Stated interest rates	[1]	2.80%	2.80%	2.80%
Others | Minimum | Fixed rate-(2)
Debt Instrument [Line Items]
Maturity /Call dates	[1]	2025
Stated interest rates	[1]	5.18%		5.18%
Others | Maximum | Variable rate—(1)
Debt Instrument [Line Items]
Maturity /Call dates	[1]	2029	2026
Stated interest rates	[1]	6.51%	4.80%	6.51%
Others | Maximum | Variable rate—(2)
Debt Instrument [Line Items]
Maturity /Call dates	[1]	2030	2029
Stated interest rates	[1]	9%	9.44%	9%
Others | Maximum | Fixed rate-(1)
Debt Instrument [Line Items]
Maturity /Call dates	[1]	2034	2030
Stated interest rates	[1]	9.60%	9.81%	9.60%
Others | Maximum | Fixed rate-(2)
Debt Instrument [Line Items]
Maturity /Call dates	[1]	2029
Stated interest rates	[1]	8.19%		8.19%
[1]Variable rate — (1), Perpetual debt — (2) and Fixed rate — (2) represent foreign currency debt. Variable rate debt is typically indexed to LIBOR, SOFR, T-bill rates, Marginal cost of funds based lending rates (“MCLR”), among others.

Long-Term Debt - Scheduled Matu

Long-Term Debt - Scheduled Maturities of Long-Term Debt (Detail) ₨ in Millions, $ in Millions		Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)
Due in the twelve months ending March 31:
Total		₨ 6,648,772	$ 79,778.9	₨ 2,054,436.4
Long-Term Debt Excluding Perpetual Debt
Due in the twelve months ending March 31:
2025		706,824.8	8,481.2
2026		1,602,175.8	19,224.6
2027		1,359,351.1	16,311
2028		284,462.3	3,413.3
2029		596,057	7,152.1
Thereafter		1,969,519.5	23,632.3
Total	[1]	₨ 6,518,390.5	$ 78,214.5
[1]The scheduled maturities of long-term debt do not include perpetual bonds of Rs. 130,381.5 million (net of debt issuance cost).

Long-Term Debt - Scheduled Ma_2

Long-Term Debt - Scheduled Maturities of Long-Term Debt (Parenthetical) (Detail) ₨ in Millions, $ in Millions	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)
Debt Instrument [Line Items]
Long-term debt	₨ 6,648,772	$ 79,778.9	₨ 2,054,436.4
Perpetual debt
Debt Instrument [Line Items]
Long-term debt	₨ 130,381.5

Accrued Expenses and Other Li_3

Accrued Expenses and Other Liabilities - Additional Information (Detail) ₨ in Millions, $ in Millions	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)
Credit card
Other Liabilities [Line Items]
Unamortized annual fees	₨ 1,649.9	$ 19.8	₨ 1,194.7

Accrued Expenses and Other Li_4

Accrued Expenses and Other Liabilities (Detail) ₨ in Millions, $ in Millions	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)
Other Liabilities [Line Items]
Bills payable	₨ 139,454.3	$ 1,673.3	₨ 117,907.5
Remittances in transit	85,743.4	1,028.8	61,927.3
Accrued expenses	82,752.6	993	45,684.4
Accounts payable	292,846	3,513.9	206,920.4
Derivatives (-refer to note 25)	109,409.9	1,312.8	98,783.5
Deferred tax	288,154.4	3,457.6	0
Lease liability	131,043	1,572.4	97,658.9
Others	165,599.2	1,987	125,471.4
Total	₨ 1,295,002.8	$ 15,538.8	₨ 754,353.4
Operating Lease, Liability, Statement of Financial Position [Extensible List]	Lease liability	Lease liability	Lease liability

Changes in Accumulated Other Co

Changes in Accumulated Other Comprehensive Income After Tax (Detail) ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	₨ 2,917,837.9		₨ 2,509,453.4
Net unrealized gain/ (loss) arising during the period	78,846.4		(49,144.3)
Amounts reclassified to income	4,856.3		(1,336.9)
Long-duration insurance contract discount rate change	(34,112.6)
Transferred to undistributed policyholders earnings account	3,391.4
Net change	(15,292.2)
Less: Other comprehensive income attributable to shareholders of noncontrolling interest	248.2
Balance	7,886,182.8	$ 94,626.7	2,917,837.9
AFS debt Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(74,923.1)		(21,063.4)
Net unrealized gain/ (loss) arising during the period	78,036.1		(52,522.8)
Amounts reclassified to income	4,856.3		(1,336.9)
Long-duration insurance contract discount rate change	0
Transferred to undistributed policyholders earnings account	0
Net change	7,969.3
Less: Other comprehensive income attributable to shareholders of noncontrolling interest	15,474.5
Balance	(7,505.2)	(90.1)	(74,923.1)
Foreign Currency Translation Reserve
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	6,649.4		3,270.9
Net unrealized gain/ (loss) arising during the period	810.3		3,378.5
Amounts reclassified to income	0		0
Long-duration insurance contract discount rate change	0
Transferred to undistributed policyholders earnings account	0
Net change	7,459.7
Less: Other comprehensive income attributable to shareholders of noncontrolling interest	17.9
Balance	7,441.8	89.3	6,649.4
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(68,273.7)		(17,792.5)
Balance	(15,540.4)	(186.5)	(68,273.7)
Long-Duration Insurance Contract
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	0
Net unrealized gain/ (loss) arising during the period	0
Amounts reclassified to income	0
Long-duration insurance contract discount rate change	(34,112.6)
Transferred to undistributed policyholders earnings account	3,391.4
Net change	(30,721.2)
Less: Other comprehensive income attributable to shareholders of noncontrolling interest	(15,244.2)
Balance	₨ (15,477)	$ (185.7)	₨ 0

Reclassification Out of Accumul

Reclassification Out of Accumulated Other Comprehensive Income (OCI) by Income line Item and the Related Tax Effect (Detail) ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)
AFS debt securities:
Allowance on AFS debt securities	₨ (70.9)	$ (0.9)	₨ 70.9
Net of income tax	4,856.3		(1,336.9)
AFS debt Securities
AFS debt securities:
Net of income tax	4,856.3		(1,336.9)
Reclassification out of Accumulated Other Comprehensive Income | AFS debt Securities
AFS debt securities:
Realized (gain)/loss on sales of AFS debt securities, net	6,602.9	79.3	(1,857.5)
Allowance on AFS debt securities	(70.9)	(0.9)	70.9
Total before income tax	6,532	78.4	(1,786.6)
Income tax	(1,675.7)	(20.1)	449.7
Net of income tax	₨ 4,856.3	$ 58.3	₨ (1,336.9)

Insurance services - Summary of

Insurance services - Summary of Balances of and Changes in Separate Account Liabilities (Detail) - 9 months ended Mar. 31, 2024 ₨ in Millions, $ in Millions	INR (₨)	USD ($)
Separate Account, Liability [Line Items]
Beginning Balance	₨ 857,528.7	$ 10,289.5
Premiums and deposits	116,856.2	1,402.1
Policy Charges	(14,111.7)	(169.3)
Surrenders and withdrawals	(119,417.6)	(1,432.9)
Benefit Payments	(40,431.7)	(485.1)
Investment Performance	158,152	1,897.7
Other Charges	(3,159.6)	(37.9)
Ending Balance	955,416.3	$ 11,464.1
Unit-Linked Life [Member]
Separate Account, Liability [Line Items]
Beginning Balance	709,215.4
Premiums and deposits	97,196.3
Policy Charges	(12,754.4)
Surrenders and withdrawals	(104,102.3)
Benefit Payments	(37,926.8)
Investment Performance	141,987.6
Other Charges	(2,904.3)
Ending Balance	790,711.5
Unit-Linked Pension [Member]
Separate Account, Liability [Line Items]
Beginning Balance	55,986.3
Premiums and deposits	3,556.3
Policy Charges	(594.4)
Surrenders and withdrawals	(8,432.7)
Benefit Payments	(2,504.9)
Investment Performance	7,709.9
Other Charges	(124.2)
Ending Balance	55,596.3
Group Linked [Member]
Separate Account, Liability [Line Items]
Beginning Balance	92,327
Premiums and deposits	16,103.6
Policy Charges	(762.9)
Surrenders and withdrawals	(6,882.6)
Benefit Payments	0
Investment Performance	8,454.5
Other Charges	(131.1)
Ending Balance	₨ 109,108.5

Insurance services - Summary _2

Insurance services - Summary of Bank's Aggregate Fair Value of Assets, by Major Investment Asset Category, Supporting Separate Accounts Liabilities (Detail) ₨ in Millions, $ in Millions	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)
Fair Value, Separate Account Investment [Line Items]
Separate Account Assets	₨ 955,416.3	$ 11,464.1	₨ 0
Government of India securities [Member}
Fair Value, Separate Account Investment [Line Items]
Separate Account Assets	93,097.3	1,117
Other corporate/financial institution securities [Member]
Fair Value, Separate Account Investment [Line Items]
Separate Account Assets	117,615.1	1,411.3
Total debt securities [Member]
Fair Value, Separate Account Investment [Line Items]
Separate Account Assets	210,712.4	2,528.3
Other securities (including mutual fund units) [Member]
Fair Value, Separate Account Investment [Line Items]
Separate Account Assets	736,807	8,841
Other net current assets [Member]
Fair Value, Separate Account Investment [Line Items]
Separate Account Assets	7,896.9	$ 94.8
UL Life [Member]
Fair Value, Separate Account Investment [Line Items]
Separate Account Assets	790,711.5
UL Life [Member] | Government of India securities [Member}
Fair Value, Separate Account Investment [Line Items]
Separate Account Assets	39,549.7
UL Life [Member] | Other corporate/financial institution securities [Member]
Fair Value, Separate Account Investment [Line Items]
Separate Account Assets	74,622.2
UL Life [Member] | Total debt securities [Member]
Fair Value, Separate Account Investment [Line Items]
Separate Account Assets	114,171.9
UL Life [Member] | Other securities (including mutual fund units) [Member]
Fair Value, Separate Account Investment [Line Items]
Separate Account Assets	671,814.6
UL Life [Member] | Other net current assets [Member]
Fair Value, Separate Account Investment [Line Items]
Separate Account Assets	4,725
UL Pension [Member}
Fair Value, Separate Account Investment [Line Items]
Separate Account Assets	55,596.3
UL Pension [Member} | Government of India securities [Member}
Fair Value, Separate Account Investment [Line Items]
Separate Account Assets	7,114.1
UL Pension [Member} | Other corporate/financial institution securities [Member]
Fair Value, Separate Account Investment [Line Items]
Separate Account Assets	8,253.7
UL Pension [Member} | Total debt securities [Member]
Fair Value, Separate Account Investment [Line Items]
Separate Account Assets	15,367.8
UL Pension [Member} | Other securities (including mutual fund units) [Member]
Fair Value, Separate Account Investment [Line Items]
Separate Account Assets	39,955.9
UL Pension [Member} | Other net current assets [Member]
Fair Value, Separate Account Investment [Line Items]
Separate Account Assets	272.6
Group Linked [Member]
Fair Value, Separate Account Investment [Line Items]
Separate Account Assets	109,108.5
Group Linked [Member] | Government of India securities [Member}
Fair Value, Separate Account Investment [Line Items]
Separate Account Assets	46,433.5
Group Linked [Member] | Other corporate/financial institution securities [Member]
Fair Value, Separate Account Investment [Line Items]
Separate Account Assets	34,739.2
Group Linked [Member] | Total debt securities [Member]
Fair Value, Separate Account Investment [Line Items]
Separate Account Assets	81,172.7
Group Linked [Member] | Other securities (including mutual fund units) [Member]
Fair Value, Separate Account Investment [Line Items]
Separate Account Assets	25,036.5
Group Linked [Member] | Other net current assets [Member]
Fair Value, Separate Account Investment [Line Items]
Separate Account Assets	₨ 2,899.3

Insurance services - Summary _3

Insurance services - Summary of Bank's Liabilities on Policies in Force on the Consolidated Balance Sheet (Detail) ₨ in Millions, $ in Millions	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)
Separate Accounts Disclosure [Abstract]
Liability for Future Policy Benefits	₨ 1,671,384.1	$ 20,055
Policyholder Account Balances	85,430.1	1,025.1
Other Policy Liabilities Payable	7,164.9	86
Total	₨ 1,763,979.1	$ 21,166.1	₨ 0

Insurance services - Summary _4

Insurance services - Summary of Bank's Liability for Future Policy Benefits on the Consolidated Balance Sheets (Detail) - Mar. 31, 2024 ₨ in Millions, $ in Millions	INR (₨)	USD ($)
Liability for Future Policy Benefits [Line Items]
Future policy benefits	₨ 1,671,384.1	$ 20,055
Non Par Protection [Member]
Liability for Future Policy Benefits [Line Items]
Future policy benefits	166,649.2	1,999.6
Non Par Riders [Member]
Liability for Future Policy Benefits [Line Items]
Future policy benefits	207	2.5
Non Par Savings [Member]
Liability for Future Policy Benefits [Line Items]
Future policy benefits	551,186.3	6,613.7
Non Par Pension [Member]
Liability for Future Policy Benefits [Line Items]
Future policy benefits	17,609.5	211.3
Individual Annuity [Member]
Liability for Future Policy Benefits [Line Items]
Future policy benefits	255,858.7	3,070.1
Individual Health [Member]
Liability for Future Policy Benefits [Line Items]
Future policy benefits	410.4	4.9
Par Life [Member]
Liability for Future Policy Benefits [Line Items]
Future policy benefits	561,076.4	6,732.4
Par Pension [Member]
Liability for Future Policy Benefits [Line Items]
Future policy benefits	16,294.1	195.5
Group Non par Life [Member]
Liability for Future Policy Benefits [Line Items]
Future policy benefits	₨ 102,092.5	$ 1,225

Insurance services - Summary _5

Insurance services - Summary of Information About the Direct and Assumed Liability for Future Policy Benefits (Detail) ₨ in Millions, $ in Millions	9 Months Ended
	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2024 USD ($)
Present value of expected net premium
Beginning balance	₨ 296,106.5	$ 3,553
Beginning balance	296,106.5	3,553
Effect of changes in cash flow assumptions	5,012		$ 60.1
Effect of actuarial variances from expected experience	13,765.7		165.2
Adjusted Balance	314,884.2		3,778.3
Issuances	197,150.9	2,365.6
Interest accrual	24,832.6	298
Net premium collected	(146,175.9)	(1,754)
Ending balance	390,691.8	4,687.9
Effect of changes in discount rate assumptions	(1,118.5)		(13.4)
Ending balance	389,573.3	4,674.5
Present value of Expected Future Policy Benefits
Beginning balance	1,654,247.7	19,849.4
Beginning balance	1,654,247.7	19,849.4
Effect of changes in cash flow assumptions	11,415.8		137
Effect of actuarial variances from expected experience	11,032.8		132.4
Adjusted Balance	1,676,696.3		20,118.8
Issuances	197,041.6	2,364.3
Interest accrual	104,865.4	1,258.3
Benefits Payments	(98,680.5)	(1,184.1)
Ending balance	1,879,922.8	22,557.3
Effect of changes in discount rate assumptions	34,013.7		408.1
Ending balance	1,913,936.5	$ 22,965.4
Present value of expected claims expenses	998.6		12
Net liability for future policy benefits	1,525,361.8		18,302.9
Deferred Profit Liability	113,119.6		1,357.3
Other global reserves	32,902.7		394.8
Total liability for future policy benefits and DPL for March 31	1,671,384.1		20,055
Less: Reinsurance recoverable	105,592.6		1,267
Net liability for future policy benefits, net of reinsurance	1,565,791.5		18,788
Undiscounted- Expected future benefit payments	6,308,350.2		75,694.1
Discounted- Expected future benefit payments (at current discount rate at balance sheet date)	1,913,936.5		22,965.4
Undiscounted-Expected future gross premiums	1,453,898.8		17,445.4
Discounted-Expected future gross premiums	1,102,691.6		$ 13,231.2
Non Par Protection [Member]
Present value of expected net premium
Beginning balance	40,899.8
Beginning balance	40,899.8
Effect of changes in cash flow assumptions	4,429.1
Effect of actuarial variances from expected experience	(1,277.3)
Adjusted Balance	44,051.6
Issuances	18,075.3
Interest accrual	3,343.2
Net premium collected	(7,081.9)
Ending balance	58,388.2
Effect of changes in discount rate assumptions	174
Ending balance	58,562.2
Present value of Expected Future Policy Benefits
Beginning balance	180,285
Beginning balance	180,285
Effect of changes in cash flow assumptions	7,429.2
Effect of actuarial variances from expected experience	(1,526)
Adjusted Balance	186,188.2
Issuances	18,051
Interest accrual	11,529.5
Benefits Payments	(5,294.9)
Ending balance	210,473.8
Effect of changes in discount rate assumptions	6,215.7
Ending balance	216,689.5
Present value of expected claims expenses	242
Net liability for future policy benefits	158,369.3
Deferred Profit Liability	6,568.5
Other global reserves	1,711.4
Total liability for future policy benefits and DPL for March 31	166,649.2
Less: Reinsurance recoverable	83,420.6
Net liability for future policy benefits, net of reinsurance	83,228.6
Undiscounted- Expected future benefit payments	1,120,561.7
Discounted- Expected future benefit payments (at current discount rate at balance sheet date)	216,689.5
Undiscounted-Expected future gross premiums	296,828.1
Discounted-Expected future gross premiums	₨ 172,175.3
Weighted-average duration of the liability	13 years 6 months		13 years 6 months
Weighted-average interest accretion (original locked-in) rate	7.69%		7.69%
Weighted-average current discount rate at balance sheet date	7.40%		7.40%
Non Par Riders [Member]
Present value of expected net premium
Beginning balance	₨ 429.3
Beginning balance	429.3
Effect of changes in cash flow assumptions	0
Effect of actuarial variances from expected experience	15.6
Adjusted Balance	444.9
Issuances	891.5
Interest accrual	69.4
Net premium collected	(256.7)
Ending balance	1,149.1
Effect of changes in discount rate assumptions	(2.6)
Ending balance	1,146.5
Present value of Expected Future Policy Benefits
Beginning balance	413.9
Beginning balance	413.9
Effect of changes in cash flow assumptions	0
Effect of actuarial variances from expected experience	15.9
Adjusted Balance	429.8
Issuances	882.1
Interest accrual	73.3
Benefits Payments	(81.5)
Ending balance	1,303.7
Effect of changes in discount rate assumptions	4.7
Ending balance	1,308.4
Present value of expected claims expenses	26.8
Net liability for future policy benefits	188.7
Deferred Profit Liability	18.3
Other global reserves	0
Total liability for future policy benefits and DPL for March 31	207
Less: Reinsurance recoverable	28
Net liability for future policy benefits, net of reinsurance	179
Undiscounted- Expected future benefit payments	2,580.3
Discounted- Expected future benefit payments (at current discount rate at balance sheet date)	1,308.4
Undiscounted-Expected future gross premiums	3,359.9
Discounted-Expected future gross premiums	₨ 2,461.1
Weighted-average duration of the liability	10 years 6 months 25 days		10 years 6 months 25 days
Weighted-average interest accretion (original locked-in) rate	7.69%		7.69%
Weighted-average current discount rate at balance sheet date	7.40%		7.40%
Non Par Savings [Member]
Present value of expected net premium
Beginning balance	₨ 251,372.4
Beginning balance	251,372.4
Effect of changes in cash flow assumptions	(42.8)
Effect of actuarial variances from expected experience	2,649
Adjusted Balance	253,978.6
Issuances	93,550.6
Interest accrual	17,926.3
Net premium collected	(72,133.2)
Ending balance	293,322.3
Effect of changes in discount rate assumptions	(1,182)
Ending balance	292,140.3
Present value of Expected Future Policy Benefits
Beginning balance	658,883
Beginning balance	658,883
Effect of changes in cash flow assumptions	3,429
Effect of actuarial variances from expected experience	2,653.6
Adjusted Balance	664,965.6
Issuances	93,520
Interest accrual	43,134.7
Benefits Payments	(8,918.6)
Ending balance	792,701.7
Effect of changes in discount rate assumptions	17,990.2
Ending balance	810,691.9
Present value of expected claims expenses	142.2
Net liability for future policy benefits	518,693.8
Deferred Profit Liability	29,891.5
Other global reserves	2,601
Total liability for future policy benefits and DPL for March 31	551,186.3
Less: Reinsurance recoverable	(17.4)
Net liability for future policy benefits, net of reinsurance	551,203.7
Undiscounted- Expected future benefit payments	2,875,101.5
Discounted- Expected future benefit payments (at current discount rate at balance sheet date)	810,691.9
Undiscounted-Expected future gross premiums	611,779.3
Discounted-Expected future gross premiums	₨ 489,752
Weighted-average duration of the liability	10 years 4 months 20 days		10 years 4 months 20 days
Weighted-average interest accretion (original locked-in) rate	7.69%		7.69%
Weighted-average current discount rate at balance sheet date	7.42%		7.42%
Non Par Pension [Member]
Present value of expected net premium
Beginning balance	₨ 97.1
Beginning balance	97.1
Effect of changes in cash flow assumptions	0.3
Effect of actuarial variances from expected experience	0.8
Adjusted Balance	98.2
Issuances	1,918.4
Interest accrual	98.4
Net premium collected	(537.5)
Ending balance	1,577.5
Effect of changes in discount rate assumptions	(6.3)
Ending balance	1,571.2
Present value of Expected Future Policy Benefits
Beginning balance	13,185.7
Beginning balance	13,185.7
Effect of changes in cash flow assumptions	35.1
Effect of actuarial variances from expected experience	(187)
Adjusted Balance	13,033.8
Issuances	1,918.4
Interest accrual	798
Benefits Payments	(2,530.3)
Ending balance	13,219.9
Effect of changes in discount rate assumptions	(28.9)
Ending balance	13,191
Present value of expected claims expenses	2.8
Net liability for future policy benefits	11,622.6
Deferred Profit Liability	175.2
Other global reserves	5,811.7
Total liability for future policy benefits and DPL for March 31	17,609.5
Less: Reinsurance recoverable	0
Net liability for future policy benefits, net of reinsurance	17,609.5
Undiscounted- Expected future benefit payments	19,433.2
Discounted- Expected future benefit payments (at current discount rate at balance sheet date)	13,191
Undiscounted-Expected future gross premiums	3,502.2
Discounted-Expected future gross premiums	₨ 2,869.1
Weighted-average duration of the liability	4 years 3 months		4 years 3 months
Weighted-average interest accretion (original locked-in) rate	7.69%		7.69%
Weighted-average current discount rate at balance sheet date	7.66%		7.66%
Individual Annuity [Member]
Present value of expected net premium
Beginning balance	₨ 2,472.3
Beginning balance	2,472.3
Effect of changes in cash flow assumptions	6.4
Effect of actuarial variances from expected experience	395.8
Adjusted Balance	2,874.5
Issuances	36,417.8
Interest accrual	1,272.8
Net premium collected	(32,412.7)
Ending balance	8,152.4
Effect of changes in discount rate assumptions	4.3
Ending balance	8,156.7
Present value of Expected Future Policy Benefits
Beginning balance	212,888.9
Beginning balance	212,888.9
Effect of changes in cash flow assumptions	75.7
Effect of actuarial variances from expected experience	(136.9)
Adjusted Balance	212,827.7
Issuances	36,417.8
Interest accrual	14,141.1
Benefits Payments	(12,654)
Ending balance	250,732.6
Effect of changes in discount rate assumptions	6,399.5
Ending balance	257,132.1
Present value of expected claims expenses	32.9
Net liability for future policy benefits	249,008.3
Deferred Profit Liability	6,543.2
Other global reserves	307.2
Total liability for future policy benefits and DPL for March 31	255,858.7
Less: Reinsurance recoverable	0
Net liability for future policy benefits, net of reinsurance	255,858.7
Undiscounted- Expected future benefit payments	864,912.6
Discounted- Expected future benefit payments (at current discount rate at balance sheet date)	257,132.1
Undiscounted-Expected future gross premiums	21,253
Discounted-Expected future gross premiums	₨ 18,427.5
Weighted-average duration of the liability	10 years 3 months 18 days		10 years 3 months 18 days
Weighted-average interest accretion (original locked-in) rate	7.69%		7.69%
Weighted-average current discount rate at balance sheet date	7.42%		7.42%
Individual Health [Member]
Present value of expected net premium
Beginning balance	₨ 791.6
Beginning balance	791.6
Effect of changes in cash flow assumptions	0
Effect of actuarial variances from expected experience	43.6
Adjusted Balance	835.2
Issuances	33.8
Interest accrual	44.5
Net premium collected	(171.1)
Ending balance	742.4
Effect of changes in discount rate assumptions	(1.8)
Ending balance	740.6
Present value of Expected Future Policy Benefits
Beginning balance	1,088.2
Beginning balance	1,088.2
Effect of changes in cash flow assumptions	0
Effect of actuarial variances from expected experience	43.7
Adjusted Balance	1,131.9
Issuances	33.8
Interest accrual	63.1
Benefits Payments	(137.5)
Ending balance	1,091.3
Effect of changes in discount rate assumptions	0.1
Ending balance	1,091.4
Present value of expected claims expenses	0.1
Net liability for future policy benefits	350.9
Deferred Profit Liability	0
Other global reserves	59.5
Total liability for future policy benefits and DPL for March 31	410.4
Less: Reinsurance recoverable	125.2
Net liability for future policy benefits, net of reinsurance	285.2
Undiscounted- Expected future benefit payments	1,758.2
Discounted- Expected future benefit payments (at current discount rate at balance sheet date)	1,091.4
Undiscounted-Expected future gross premiums	1,769.6
Discounted-Expected future gross premiums	₨ 1,289.9
Weighted-average duration of the liability	5 years 11 months 15 days		5 years 11 months 15 days
Weighted-average interest accretion (original locked-in) rate	7.69%		7.69%
Weighted-average current discount rate at balance sheet date	7.50%		7.50%
Par Life [Member]
Present value of expected net premium
Beginning balance	₨ 44
Beginning balance	44
Effect of changes in cash flow assumptions	619
Effect of actuarial variances from expected experience	2,640.7
Adjusted Balance	3,303.7
Issuances	27,308.5
Interest accrual	1,539.5
Net premium collected	(6,418.9)
Ending balance	25,732.8
Effect of changes in discount rate assumptions	(97.2)
Ending balance	25,635.6
Present value of Expected Future Policy Benefits
Beginning balance	504,494.2
Beginning balance	504,494.2
Effect of changes in cash flow assumptions	(1,377.7)
Effect of actuarial variances from expected experience	2,250.6
Adjusted Balance	505,367.1
Issuances	27,264
Interest accrual	29,361.4
Benefits Payments	(45,730.7)
Ending balance	516,261.8
Effect of changes in discount rate assumptions	3,658.3
Ending balance	519,920.1
Present value of expected claims expenses	547.5
Net liability for future policy benefits	494,832
Deferred Profit Liability	63,225
Other global reserves	3,019.4
Total liability for future policy benefits and DPL for March 31	561,076.4
Less: Reinsurance recoverable	18,249.9
Net liability for future policy benefits, net of reinsurance	542,826.5
Undiscounted- Expected future benefit payments	1,302,045.2
Discounted- Expected future benefit payments (at current discount rate at balance sheet date)	519,920.1
Undiscounted-Expected future gross premiums	507,662.9
Discounted-Expected future gross premiums	₨ 409,535.4
Weighted-average duration of the liability	8 years 4 months 20 days		8 years 4 months 20 days
Weighted-average interest accretion (original locked-in) rate	7.69%		7.69%
Weighted-average current discount rate at balance sheet date	7.48%		7.48%
Par Pension [Member]
Present value of expected net premium
Beginning balance	₨ 0
Beginning balance	0
Effect of changes in cash flow assumptions	0
Effect of actuarial variances from expected experience	(0.7)
Adjusted Balance	(0.7)
Issuances	2,081.3
Interest accrual	102.3
Net premium collected	(562.6)
Ending balance	1,620.3
Effect of changes in discount rate assumptions	(7)
Ending balance	1,613.3
Present value of Expected Future Policy Benefits
Beginning balance	16,744.8
Beginning balance	16,744.8
Effect of changes in cash flow assumptions	326.1
Effect of actuarial variances from expected experience	539.3
Adjusted Balance	17,610.2
Issuances	2,080.8
Interest accrual	1,063.9
Benefits Payments	(2,959.8)
Ending balance	17,795.1
Effect of changes in discount rate assumptions	(37.5)
Ending balance	17,757.6
Present value of expected claims expenses	4.3
Net liability for future policy benefits	16,148.6
Deferred Profit Liability	95.9
Other global reserves	49.6
Total liability for future policy benefits and DPL for March 31	16,294.1
Less: Reinsurance recoverable	0
Net liability for future policy benefits, net of reinsurance	16,294.1
Undiscounted- Expected future benefit payments	25,927.9
Discounted- Expected future benefit payments (at current discount rate at balance sheet date)	17,757.6
Undiscounted-Expected future gross premiums	7,523.1
Discounted-Expected future gross premiums	₨ 6,057
Weighted-average duration of the liability	4 years 21 days		4 years 21 days
Weighted-average interest accretion (original locked-in) rate	7.69%		7.69%
Weighted-average current discount rate at balance sheet date	7.66%		7.66%
Group Non par Life [Member]
Present value of expected net premium
Beginning balance	₨ 0
Beginning balance	0
Effect of changes in cash flow assumptions	0
Effect of actuarial variances from expected experience	9,298.2
Adjusted Balance	9,298.2
Issuances	16,873.7
Interest accrual	436.2
Net premium collected	(26,601.3)
Ending balance	6.8
Effect of changes in discount rate assumptions	0.1
Ending balance	6.9
Present value of Expected Future Policy Benefits
Beginning balance	66,264
Beginning balance	66,264
Effect of changes in cash flow assumptions	1,498.4
Effect of actuarial variances from expected experience	7,379.6
Adjusted Balance	75,142
Issuances	16,873.7
Interest accrual	4,700.4
Benefits Payments	(20,373.2)
Ending balance	76,342.9
Effect of changes in discount rate assumptions	(188.4)
Ending balance	76,154.5
Present value of expected claims expenses	0
Net liability for future policy benefits	76,147.6
Deferred Profit Liability	6,602
Other global reserves	19,342.9
Total liability for future policy benefits and DPL for March 31	102,092.5
Less: Reinsurance recoverable	3,786.3
Net liability for future policy benefits, net of reinsurance	98,306.2
Undiscounted- Expected future benefit payments	96,029.6
Discounted- Expected future benefit payments (at current discount rate at balance sheet date)	76,154.5
Undiscounted-Expected future gross premiums	220.7
Discounted-Expected future gross premiums	₨ 124.3
Weighted-average duration of the liability	3 years 2 months 23 days		3 years 2 months 23 days
Weighted-average interest accretion (original locked-in) rate	7.69%		7.69%
Weighted-average current discount rate at balance sheet date	7.68%		7.68%

Insurance services - Summary _6

Insurance services - Summary of Bank's Gross Premiums or Assessments and Interest Expense Recognised (Detail) - 9 months ended Mar. 31, 2024 ₨ in Millions, $ in Millions	INR (₨)	USD ($)
Disclosure In Tabular Form Of Gross Premium And Interest Expenses On Long Duration Insurance Contracts [Line Items]
Gross premiums or assessments	₨ 369,852	$ 4,437.9
Interest expense	82,760.2	$ 993
Non Par Protection [Member]
Disclosure In Tabular Form Of Gross Premium And Interest Expenses On Long Duration Insurance Contracts [Line Items]
Gross premiums or assessments	120,828.1
Interest expense	8,357.9
Non Par Riders [Member]
Disclosure In Tabular Form Of Gross Premium And Interest Expenses On Long Duration Insurance Contracts [Line Items]
Gross premiums or assessments	0
Interest expense	4.4
Non Par Savings [Member]
Disclosure In Tabular Form Of Gross Premium And Interest Expenses On Long Duration Insurance Contracts [Line Items]
Gross premiums or assessments	23,560
Interest expense	25,621
Non Par Pension [Member]
Disclosure In Tabular Form Of Gross Premium And Interest Expenses On Long Duration Insurance Contracts [Line Items]
Gross premiums or assessments	1,020.9
Interest expense	704
Individual Annuity [Member]
Disclosure In Tabular Form Of Gross Premium And Interest Expenses On Long Duration Insurance Contracts [Line Items]
Gross premiums or assessments	39,984.9
Interest expense	12,926.3
Individual Health [Member]
Disclosure In Tabular Form Of Gross Premium And Interest Expenses On Long Duration Insurance Contracts [Line Items]
Gross premiums or assessments	419
Interest expense	17.6
Par Life [Member]
Disclosure In Tabular Form Of Gross Premium And Interest Expenses On Long Duration Insurance Contracts [Line Items]
Gross premiums or assessments	111,036.4
Interest expense	29,795.5
Par Pension [Member]
Disclosure In Tabular Form Of Gross Premium And Interest Expenses On Long Duration Insurance Contracts [Line Items]
Gross premiums or assessments	1,846.5
Interest expense	962.1
Group Non par Life [Member]
Disclosure In Tabular Form Of Gross Premium And Interest Expenses On Long Duration Insurance Contracts [Line Items]
Gross premiums or assessments	71,156.2
Interest expense	₨ 4,371.4

Insurance services - Summary _7

Insurance services - Summary of the Bank's Policyholder Account Balances on the Consolidated Balance (Detail) - Mar. 31, 2024 ₨ in Millions, $ in Millions	INR (₨)	USD ($)
Disclosure Of Policyholder Account Balances [Line Items]
Policyholder Account Balance	₨ 85,430.1	$ 1,025.1
Group Traditional Life [Member]
Disclosure Of Policyholder Account Balances [Line Items]
Policyholder Account Balance	23,718.6	284.6
Group Traditional Pension [Member]
Disclosure Of Policyholder Account Balances [Line Items]
Policyholder Account Balance	8,824.2	105.9
Group Variable Life [Member]
Disclosure Of Policyholder Account Balances [Line Items]
Policyholder Account Balance	22,764.1	273.1
Group Variable Pension [Member]
Disclosure Of Policyholder Account Balances [Line Items]
Policyholder Account Balance	19,200.9	230.4
Individual VIP pension [Member]
Disclosure Of Policyholder Account Balances [Line Items]
Policyholder Account Balance	9,613.9	115.4
Statutory reserves [Member]
Disclosure Of Policyholder Account Balances [Line Items]
Policyholder Account Balance	₨ 1,308.4	$ 15.7

Insurance services - Summary _8

Insurance services - Summary of Bank Maintains a Number of Reinsurance Treaties with Third Parties (Detail) - Mar. 31, 2024 ₨ in Millions, $ in Millions		INR (₨)	USD ($)
Separate Accounts Disclosure [Abstract]
Direct		₨ 1,763,024.4	$ 21,154.6
Assumed		954.7	11.5
Total liabilities on policies in force		1,763,979.1	21,166.1
Ceded	[1]	105,661.6	1,267.8
Net liabilities on policies in force		₨ 1,658,317.5	$ 19,898.3
[1]Reinsurance asset reported within other asset

Insurance services - Summary _9

Insurance services - Summary of Effect of Reinsurance (Detail) - 12 months ended Mar. 31, 2024 ₨ in Millions, $ in Millions	INR (₨)	USD ($)
Premium and other operating income from insurance business:
Direct	₨ 389,925.5	$ 4,678.7
Assumed	1,588.5	19.1
Ceded	(9,634.5)	(115.6)
Total	381,879.5	4,582.2
Claims and benefits paid pertaining to insurance business:
Direct	383,194.5	4,597.9
Assumed	1,029.4	12.4
Ceded	(2,258.1)	(27.1)
Total	₨ 381,965.8	$ 4,583.2

Insurance services - Summary_10

Insurance services - Summary of Information Regarding Total DAC (Detail) - 12 months ended Mar. 31, 2024 ₨ in Millions, $ in Millions	INR (₨)	USD ($)
Separate Accounts Disclosure [Abstract]
Opening balance July 1, 2024	₨ 0	$ 0
Capitalizations	64,390	772.6
Amortization	(2,971.3)	(35.7)
Experience Adjustment	(886.8)	(10.6)
Balance at March 31, 2024	₨ 60,531.9	$ 726.3

Insurance services - Summary_11

Insurance services - Summary of Information Regarding Movement of Total VOBA Contracts (Detail) - 9 months ended Mar. 31, 2024 ₨ in Millions, $ in Millions	INR (₨)	USD ($)
Separate Accounts Disclosure [Abstract]
Beginning balance	₨ 221,738.5	$ 2,660.6
Amortization	(16,707.7)	(200.5)
Experience Adjustment	(635.1)	(7.6)
Ending balance	₨ 204,395.7	$ 2,452.5

Insurance services - Summary_12

Insurance services - Summary of Information Regarding the Estimated Future Amortisation of VOBA Intangibles Over the Next Five Years (Detail) - Mar. 31, 2024 ₨ in Millions, $ in Millions	INR (₨)	USD ($)
Separate Accounts Disclosure [Abstract]
2025	₨ 16,705.3	$ 200.4
2026	14,721.9	176.6
2027	13,016.3	156.2
2028	11,176.1	134.1
2029	₨ 9,539.9	$ 114.5

Non-Interest Revenue - Summary

Non-Interest Revenue - Summary of Disaggregation of Revenue (Detail) ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)	Mar. 31, 2022 INR (₨)
Disaggregation of Revenue [Line Items]
Fees and commissions	₨ 280,965.9	$ 3,371.3	₨ 239,603.7	₨ 202,979.5
Deposit related fees
Disaggregation of Revenue [Line Items]
Fees and commissions	45,178.6	542.1	40,749.9	37,415.4
Lending related fees
Disaggregation of Revenue [Line Items]
Fees and commissions	55,501.7	666	48,878.2	40,532.5
Third-party products related fees
Disaggregation of Revenue [Line Items]
Fees and commissions	43,049.3	516.6	54,548.9	44,216.1
Payments and cards business fees
Disaggregation of Revenue [Line Items]
Fees and commissions	92,568.5	1,110.7	72,969	56,170.2
Investment Management Fee
Disaggregation of Revenue [Line Items]
Fees and commissions	20,819.1	249.8	0	0
Other
Disaggregation of Revenue [Line Items]
Fees and commissions	₨ 23,848.7	$ 286.1	₨ 22,457.7	₨ 24,645.3

Non-Interest Revenue - Summar_2

Non-Interest Revenue - Summary of Disaggregation of Revenue from Business Segments (Detail) ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)	Mar. 31, 2022 INR (₨)
Disaggregation of Revenue [Line Items]
Fees and commissions	₨ 280,965.9	$ 3,371.3	₨ 239,603.7	₨ 202,979.5
Retail Banking
Disaggregation of Revenue [Line Items]
Fees and commissions	229,890.7	2,758.5	215,252.5	182,464.1
Wholesale Banking
Disaggregation of Revenue [Line Items]
Fees and commissions	27,844.8	334.1	23,619.5	19,802
Treasury Services
Disaggregation of Revenue [Line Items]
Fees and commissions	414.9	5	731.7	713.4
Insurance services
Disaggregation of Revenue [Line Items]
Fees and commissions	0	0	0	0
Others
Disaggregation of Revenue [Line Items]
Fees and commissions	₨ 22,815.5	$ 273.7	₨ 0	₨ 0

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2024 INR (₨)	Mar. 31, 2023 INR (₨)	Mar. 31, 2022 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($)	Mar. 31, 2021 INR (₨)
Income Taxes [Line Items]
Total unrecognized tax benefit	₨ 22,042.3	₨ 48,792.1	₨ 46,774.3	$ 264.5	$ 585.5	₨ 43,048
The total unrecognized tax benefits, if recognized, that would reduce the tax and thereby affect the effective tax rate	22,042.3	48,792.1
Other comprehensive income	₨ (17,828.6)	₨ 16,980	₨ 15,129.2

Income Tax Expense (Detail)

Income Tax Expense (Detail) ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)	Mar. 31, 2022 INR (₨)
Components of Income Tax Expense Benefit Abstract
Current tax expense	₨ 140,308.9	$ 1,683.6	₨ 156,782.9	₨ 142,446.5
Deferred tax expense/ (benefit)	(57,133.2)	(685.5)	12,280.9	(9,887.3)
Interest on income tax refund	(5,348.6)	(64.2)	(2,946.4)	0
Income tax expense	₨ 77,827.1	$ 933.9	₨ 166,117.4	₨ 132,559.2

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Income Taxes at Indian Statutory Income Tax Rate to Income Tax Expense as Reported (Detail) ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)	Mar. 31, 2022 INR (₨)
Reconciliation of Estimated Income Taxes to Income Tax Expense as Reported [Line Items]
Income before income tax expense	₨ 705,459	$ 8,465	₨ 662,381.8	₨ 519,162.2
Statutory income tax rate	25.17%	25.17%	25.17%	25.17%
Expected income tax expense	₨ 177,549.9	$ 2,130.4	₨ 166,708.3	₨ 130,662.7
Adjustments to reconcile expected income tax to actual tax expense
Interest on income tax refund	(4,125)	(49.5)	(2,204.9)	0
Stock-based compensation	(10,645.6)	(127.7)	1,645.9	3,493.1
Income subject to rates other than the statutory income tax rate	(1,262)	(15.1)	(6.8)	(2,347.6)
Special reserve	(5,143.2)	(61.7)
Unrecognised tax benefit of earlier years including consequential tax credit pursuant to favourable orders received recognised	(80,874.4)	(970.4)
Other, net	2,327.4	27.9	(25.1)	751
Income tax expense	₨ 77,827.1	$ 933.9	₨ 166,117.4	₨ 132,559.2

Income Taxes - Tax Effects of S

Income Taxes - Tax Effects of Significant Temporary Differences (Detail) ₨ in Millions, $ in Millions	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)
Deductible temporary differences:
Allowance for credit losses	₨ 43,093.6	$ 517.1	₨ 74,143.7
Investments AFS debt securities	7,704.7	92.4	25,117
Lease liabilities	32,034.7	384.4	24,578.8
Employee benefits	4,632.2	55.6	709.9
Borrowings	10,714.9	128.6	1.4
Stock based compensation	20,166.2	241.9	0
Others	320.1	3.9	5,458.1
Deferred tax asset	118,666.4	1,423.9	130,008.9
Taxable temporary differences:
ROU Asset	32,009.3	384.1	24,578.8
Loan origination cost	7,541.1	90.5	7,070.1
Intangible assets	313,272.2	3,759	0
Investments, others	53,998.2	647.9	8,304.6
Deferred tax liability	406,820.8	4,881.5	39,953.5
Net deferred tax asset			90,055.4
Net deferred tax (liability)	₨ (288,154.4)	$ (3,457.6)	₨ 0

Income Taxes - Reconciliation_2

Income Taxes - Reconciliation of Beginning and Ending Balance of Unrecognized Tax Benefits (Detail) ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)	Mar. 31, 2022 INR (₨)
Income Tax Contingency [Line Items]
Opening balance	₨ 48,792.1	$ 585.5	₨ 46,774.3	₨ 43,048
Increase related to acquisition of eHDFC	52,980.5	635.7	0	0
Decrease related to prior year tax positions	(80,874.4)	(970.4)	0	(1,985)
Increase related to current year tax positions	1,144.1	13.7	2,017.8	5,711.3
Closing balance	₨ 22,042.3	$ 264.5	₨ 48,792.1	₨ 46,774.3

Stock - Additional Information

Stock - Additional Information (Detail) - INR (₨) ₨ / shares in Units, ₨ in Millions

1 Months Ended

8 Months Ended

12 Months Ended

Jul. 01, 2023

Nov. 25, 2021

Jul. 31, 2016

Dec. 31, 2022

Mar. 31, 2024

Mar. 31, 2023

Mar. 31, 2022

Jun. 30, 2013

Jun. 30, 2010

Jun. 30, 2007

Jun. 30, 2005

Jun. 30, 2003

Jan. 31, 2000

May 14, 2022

Mar. 31, 2021

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Stock-based compensation, intrinsic value of options exercised at grant date

₨ 5,249.6

₨ 0.5

₨ 0

Stock-based compensation, aggregate intrinsic value of options exercised at exercise date

14,548

20,891.2

22,077.7

Stock-based compensation, aggregate intrinsic value of options outstanding at grant date

22,732.3

13.3

Stock-based compensation, aggregate intrinsic value of options outstanding

28,677.5

52,286.4

Stock-based compensation, aggregate intrinsic value of options exercisable at grant date

20,373.6

0.5

Stock-based compensation, aggregate intrinsic value of options exercisable

₨ 24,363.8

₨ 29,084.2

Stock-based compensation, unvested options, outstanding

76,731,732

86,557,545

Stock-based compensation, unvested options, weighted average exercise price

₨ 1,446.2

₨ 1,341.5

Stock-based compensation, unvested options, aggregate intrinsic value at grant date

₨ 2,217.7

₨ 12.8

Stock-based compensation, unvested options, aggregate intrinsic value as at end of period

4,197.5

₨ 23,202.2

Stock-based compensation, total estimated compensation cost to be recognized in future periods

₨ 16,876.1

Equity shares, par value

₨ 1

₨ 1

Share-based payment arrangement, expense, tax benefit

₨ 5,062.8

Share-based payment arrangement, exercise of option, tax benefit

₨ 5,561.5

eHDFC [Member] | Background and Details of the Business Combination [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Equity shares, par value

₨ 1

Share based compensation by share based award options granted during the period

48,559,681

Employee Stock Option

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Stock-based compensation, weighted average period of recognition of total compensation cost not yet recognized (in years)

1 year 3 days

Share-based payment arrangement, expense

₨ 17,379.5

₨ 13,132.8

₨ 13,874.5

Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number

175,659,424

151,682,461

158,106,016

168,168,760

Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period

46,304,966

34,201,810

32,764,494

Share based compensation by share based award options granted during the period

24,384,690

30,480,145

25,628,600

Employee Stock Option | Plan ''A''

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Employees' Stock Option Scheme, equity shares reserved for issuance

100,000,000

Employees' Stock Option Scheme, aggregate nominal value of equity shares reserved

₨ 100

Employee Stock Option | Plan ''B''

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Employees' Stock Option Scheme, equity shares reserved for issuance

100,000,000

Employees' Stock Option Scheme, aggregate nominal value of equity shares reserved

₨ 100

Employee Stock Option | Plan ''C''

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Employees' Stock Option Scheme, equity shares reserved for issuance

100,000,000

Employees' Stock Option Scheme, aggregate nominal value of equity shares reserved

₨ 100

Employee Stock Option | Plan ''D''

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Employees' Stock Option Scheme, equity shares reserved for issuance

150,000,000

Employees' Stock Option Scheme, aggregate nominal value of equity shares reserved

₨ 150

Employee Stock Option | Plan "E"

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Employees' Stock Option Scheme, equity shares reserved for issuance

200,000,000

Employees' Stock Option Scheme, aggregate nominal value of equity shares reserved

₨ 200

Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number

5,075,360

Employee Stock Option | Plan "F"

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Employees' Stock Option Scheme, equity shares reserved for issuance

200,000,000

Employees' Stock Option Scheme, aggregate nominal value of equity shares reserved

₨ 200

Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number

15,551,708

Employee Stock Option | Plan "G"

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Employees' Stock Option Scheme, equity shares reserved for issuance

200,000,000

Employees' Stock Option Scheme, aggregate nominal value of equity shares reserved

₨ 200

Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number

115,413,810

Employee Stock Option | Maximum

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Employees' Stock Option Scheme, expiration

5 years

Scheme XXVII | Plan "G"

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Stock-based compensation, options granted

238,000

30,480,145

Scheme XXXVI | Plan "G"

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Stock-based compensation, options granted

25,390,600

Restricted Stock Units (RSUs) [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Stock-based compensation, total estimated compensation cost to be recognized in future periods

₨ 13,329.4

Stock-based compensation, weighted average period of recognition of total compensation cost not yet recognized (in years)

1 year 11 months 4 days

Stock-based compensation, intrinsic value of equity instruments other than options exercised at grant date

₨ 441.6

Stock-based compensation, aggregate intrinsic value of equity instruments other than options outstanding at grant date

18,122

Stock-based compensation, aggregate intrinsic value of equity instruments other than options exercisable

525.9

Stock-based compensation, aggregate intrinsic value of equity instruments other than options grant date

17,596.1

Aggregate intrinsic value, vested

16,960.3

Aggregate intrinsic value, non-vested

16,416.1

ShareBased compensation arrangement by sharebased payment award equity instruments other than options exercisable grant date intrinsic value

₨ 544.1

Weighted average fair value of RSUs granted during the year

₨ 1

Share-based payment arrangement, expense

₨ 2,736.3

Restricted Stock Units (RSUs) [Member] | Employee Stock Incentive Master Scheme Two Thousand And Twenty Two [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Employees' Stock Option Scheme, equity shares reserved for issuance

100,000,000

Equity shares, par value

₨ 1

Common stock shares reserved for future issuance aggregate par value

₨ 100

Share based compensation by share based award vesting period one

4 years

Share based compensation by share based award number of shares authorized for grant

2,891,000

Weighted average fair value of RSUs granted during the year

₨ 1,565.43

₨ 1,382.34

Restricted Stock Units (RSUs) [Member] | Employee Stock Incentive Master Scheme Two Thousand And Twenty Two [Member] | Scheme Zero Zero Four [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Share based compensation by share based award number of shares authorized for grant

9,354,224

Restricted Stock Units (RSUs) 1 [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Number of shares arising out of units

11,345,734

Scheme XLV | Plan "E"

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Stock-based compensation, options granted

5,075,360

Scheme XLV | Plan "F"

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Stock-based compensation, options granted

12,533,590

Scheme XLV | Plan "G"

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Stock-based compensation, options granted

6,775,740

HDFC Life [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number

16,115,973

Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period

6,935,731

HDFC AMC [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number

2,316,200

Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period

1,203,001

HDFC Capital Advisors [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number

141,008

Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period

141,008

HDFC Securities [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number

561,930

Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period

46,875

HDB Financial Services [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number

8,728,798

Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period

1,676,263

Estimated Fair Value of Options

Estimated Fair Value of Options on Dates of Each Grant Using Binomial Option Pricing Model (Detail) - Employees Stock Option	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividend yield	0.67%	0.51%	0.43%
Expected volatility	21.91%	21.97%	21.71%
Risk-free interest rate, lower range	7.21%	6.14%	4.99%
Expected term (in years)	4 years 6 months	2 years 6 months 10 days	2 years 7 months 2 days
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividend yield	0.71%	0.97%	0.46%
Expected volatility	27.42%	33.50%	31.79%
Risk-free interest rate, upper range	7.55%	7.59%	6.43%
Expected term (in years)	7 years 3 months	7 years 3 months	5 years 4 months 9 days

Estimated Fair Value of Restric

Estimated Fair Value of Restricted Stock Units on Dates of Each Grant Using Binomial Option Pricing Model (Detail) - Restricted Stock Units (RSUs) [Member] - Employee Stock Incentive Master Scheme Two Thousand And Twenty Two [Member]	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Share Based Compensation By Share Based Award Restricted Stock Units Valuation Assumptions [Line Items]
Expected volatility, lower range	21.32%	23.68%
Expected volatility, upper range	35.35%	35.35%
Risk-free interest rate, lower range	6.85%	7.07%
Risk-free interest rate, upper range	7.18%	7.57%
Maximum [Member]
Share Based Compensation By Share Based Award Restricted Stock Units Valuation Assumptions [Line Items]
Dividend yield	1.17%	0.75%
Expected term (in years)	4 years	4 years
Minimum [Member]
Share Based Compensation By Share Based Award Restricted Stock Units Valuation Assumptions [Line Items]
Dividend yield	0.65%	0.47%
Expected term (in years)	1 year	1 year

Activity in Options Available t

Activity in Options Available to be Granted Under Employee Stock Option Scheme (Detail) - Employee Stock Option - shares	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options available to be granted, beginning of period	54,214,165	81,992,420	104,694,170
Equity shares allocated for grant under the plan	0	0	0
Options granted	(24,384,690)	(30,480,145)	(25,628,600)
Forfeited/lapsed	2,662,442	2,701,890	2,926,850
Options available to be granted, end of period	32,491,917	54,214,165	81,992,420

Summary Of Activity in the RSU'

Summary Of Activity in the RSU's outstanding under the various Employees' Stock Incentive Master Scheme (Detail) - Restricted Stock Units (RSUs) [Member] - Employee Stock Incentive Master Scheme Two Thousand And Twenty Two [Member] - shares	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Disclosure In Tabular Form Of Movement In Restricted Stock Units One [Line Items]
Options available to be granted, beginning of period	97,109,000	0
Equity shares allocated for grant under the scheme	0	100,000,000
RSUs granted	(9,354,224)	(2,891,000)
Forfeited/lapsed	206,800	0
Options available to be granted, end of period	87,961,576	97,109,000

Activity in Options Outstanding

Activity in Options Outstanding under Employee Stock Option Scheme, Employees Stock Option Schemes (Detail) - Employee Stock Option - INR (₨)	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Options
Options outstanding, beginning of period	151,682,461	158,106,016	168,168,760
Addition on account of eHDFC merger	₨ 48,559,681	₨ 0	₨ 0
Granted	24,384,690	30,480,145	25,628,600
Exercised	(46,304,966)	(34,201,810)	(32,764,494)
Forfeited	(2,198,002)	(2,175,700)	(2,639,100)
Lapsed	(464,440)	(526,190)	(287,750)
Options outstanding, end of period	175,659,424	151,682,461	158,106,016
Options exercisable, end of period	98,829,856	65,124,916	65,321,116
Weighted Average Exercise Price
Options outstanding, beginning of period	₨ 1,264.86	₨ 1,175.65	₨ 1,063.79
Addition on account of eHDFC merger	1,124.77	0	0
Granted	1,611.84	1,425.69	1,427.29
Exercised	1,133.72	998.73	796.52
Forfeited	1,363.8	1,274.53	1,231.84
Lapsed	1,151.88	1,033.65	870.34
Options outstanding, end of period	1,307.93	1,264.86	1,175.65
Options exercisable, end of period	1,201.65	1,162.96	1,036.49
Weighted average fair value of options granted during the year	₨ 607.28	₨ 548.11	₨ 415.12

Activity in the RSU's outstandi

Activity in the RSU's outstanding under the various Employees' Stock Incentive Master Scheme (Detail) - Restricted Stock Units (RSUs) [Member] - ₨ / shares	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Schedule of Restricted Stock Shares Activity [Line Items]
Weighted average fair value of RSUs granted during the year	₨ 1
Employee Stock Incentive Master Scheme Two Thousand And Twenty Two [Member]
Schedule of Restricted Stock Shares Activity [Line Items]
RSUs outstanding, beginning of period	2,891,000	0
Granted	9,354,224	2,891,000
Exercised	(316,620)	0
Forfeited	(203,500)	0
Lapsed	(3,300)	0
RSUs outstanding, end of period	11,721,804	2,891,000
RSUs exercisable, end of period	376,070	0
RSUs outstanding, beginning of period	₨ 1	₨ 0
Granted	1	1
Exercised	1	0
Forfeited	1	0
Lapsed	1
RSUs outstanding, end of period	1	1
RSUs exercisable, end of period	1
Weighted average fair value of RSUs granted during the year	₨ 1,565.43	₨ 1,382.34

Stock Options Outstanding, Empl

Stock Options Outstanding, Employees Stock Option Schemes (Detail) - Employee Stock Option	12 Months Ended
	Mar. 31, 2024 ₨ / shares shares	Mar. 31, 2024 ₨ / shares $ / shares shares	Mar. 31, 2023 ₨ / shares shares	Mar. 31, 2022 ₨ / shares shares	Mar. 31, 2021 ₨ / shares shares
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Number Of Shares Arising Out Of Options | shares	175,659,424	175,659,424	151,682,461	158,106,016	168,168,760
Weighted Average Exercise Price | ₨ / shares	₨ 1,307.93	₨ 1,307.93	₨ 1,264.86	₨ 1,175.65	₨ 1,063.79
Plan "E"
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Range of exercise price | (per share)	₨ 1,636.9	₨ 19.64
Number Of Shares Arising Out Of Options | shares	5,075,360	5,075,360
Weighted Average Remaining Life	5 years 11 months 1 day	5 years 11 months 1 day
Weighted Average Exercise Price | ₨ / shares	₨ 1,636.9	₨ 1,636.9
Plan "F"
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Range of exercise price, Lower Range | (per share)	716.6	₨ 8.6
Range of exercise price, Upper Range | (per share)	₨ 1,636.9	₨ 19.64
Number Of Shares Arising Out Of Options | shares	15,551,708	15,551,708
Weighted Average Remaining Life	4 years 10 months 2 days	4 years 10 months 2 days
Weighted Average Exercise Price | ₨ / shares	₨ 1,458.3	₨ 1,458.3
Plan "G"
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Range of exercise price, Lower Range | (per share)	882.85	₨ 10.59
Range of exercise price, Upper Range | (per share)	₨ 1,673.1	₨ 20.08
Number Of Shares Arising Out Of Options | shares	115,413,810	115,413,810
Weighted Average Remaining Life	2 years 7 months 28 days	2 years 7 months 28 days
Weighted Average Exercise Price | ₨ / shares	₨ 1,333.8	₨ 1,333.8
eHDFC [Member]
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Range of exercise price, Lower Range | (per share)	160.79	₨ 1.93
Range of exercise price, Upper Range | (per share)	₨ 1,535.27	₨ 18.42
Number Of Shares Arising Out Of Options | shares	39,618,546	39,618,546
Weighted Average Remaining Life	3 years 5 months 23 days	3 years 5 months 23 days
Weighted Average Exercise Price | ₨ / shares	₨ 1,131.5	₨ 1,131.5

RSUs outstanding, Employees Sto

RSUs outstanding, Employees Stock Incentive Master Scheme (Detail) - Restricted Stock Units (RSUs) [Member] - Employee Stock Incentive Master Scheme Two Thousand And Twenty Two - ₨ / shares	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Share Based Payment Arrangement Equity Instruments Other Than Options Exercise Price Range [Line Items]
Number of shares arising out of units	11,721,804	2,891,000	0
Weighted average remaining life (years)	2 years 7 months 24 days
Weighted average exercise price	₨ 1

RSUs outstanding, Employees S_2

RSUs outstanding, Employees Stock Incentive Master Scheme (Parenthetical) (Detail) - Mar. 31, 2024	₨ / shares	$ / shares
Restricted Stock Units (RSUs) [Member] | Employee Stock Incentive Master Scheme Two Thousand And Twenty Two
Share Based Payment Arrangement Equity Instruments Other Than Options Exercise Price Range [Line Items]
Share based compensation by share based award equity instruments other than options exercise price per share lower limit | (per share)	₨ 1	$ 0

Retirement Benefits - Additiona

Retirement Benefits - Additional Information (Detail) ₨ in Thousands, $ in Millions	12 Months Ended
	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)	Mar. 31, 2022 INR (₨)
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, expected contribution to the plan for the next fiscal year	₨ 1,746,900
Defined benefit plan, accumulated benefit obligation	12,858,700		₨ 8,294,700
Defined contribution plan, employer contribution recognized as an expense	₨ 11,683,900		8,238,200	₨ 6,844,700
Superannuation
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan, employer annual contribution as a percentage of eligible annual salary	13%	13%
Defined contribution plan, employer contribution recognized as an expense	₨ 3,106,600		2,322,000	1,795,300
Superannuation | Managing Director, Executive Directors and for certain employees of CBoP
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan, employer annual contribution as a percentage of eligible annual salary	15%	15%
Provident Fund
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan, employer annual contribution as a percentage of eligible annual salary	12%	12%
Provident Fund Administered by Regional Provident Fund Commissioner
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan - contribution to Pension Scheme administered by Regional Provident Fund Commissioner, percentage considered - lower of the percentage of employees eligible salary or fixed amount	8.33%	8.33%
Provident Fund Administered by Regional Provident Fund Commissioner | Maximum
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	₨ 15
National Pension Scheme [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan, employer contribution recognized as an expense	₨ 161,600		78,000	₨ 57,200
Gratuity
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, number of days of eligible salary payable for each completed year of service	15 days	15 days
Defined benefit plan, vesting period	15 years	15 years
Employer contributions	₨ 717,900	$ 8.6	1,735,300
Gratuity | Vested accumulated benefit obligation
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, accumulated benefit obligation	11,691,600		7,519,800
Pension
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, expected contribution to the plan for the next fiscal year	73,300
Defined benefit plan, accumulated benefit obligation	637,600		528,600
Employer contributions	₨ 241,700	$ 2.9	111,800
Defined benefit plan minimum service period needed for annuity offer	15 years	15 years
Pension | Centurion Bank of Punjab Limited
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, employer contribution as a percentage of basic salary	10%	10%
Pension | Centurion Bank of Punjab Limited | Minimum
Defined Benefit Plan Disclosure [Line Items]
Defined benefit pension plan, Service period of employees for whom contribution made stand frozen and will be converted into an annuity on separation	10 years	10 years
Pension | Centurion Bank of Punjab Limited | Maximum
Defined Benefit Plan Disclosure [Line Items]
Defined benefit pension plan, Service period of employees for whom contribution made stand frozen and will be converted into an annuity on separation	15 years	15 years
Pension | Vested accumulated benefit obligation
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, accumulated benefit obligation	₨ 352,400		₨ 527,500

Funded Status of Gratuity Plan

Funded Status of Gratuity Plan and Amounts Recognized in Bank's Financial Statements (Detail) - Gratuity ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)	Mar. 31, 2022 INR (₨)	Mar. 31, 2024 USD ($)
Change in benefit obligations:
Projected benefit obligation ("PBO"), beginning of the period	₨ 11,491.6	$ 137.9	₨ 10,688.7
On merger of eHDFC	5,421.2	65	0
Service cost	1,968.8	23.6	1,398.6	₨ 1,268
Interest cost	981.3	11.8	773.4	631.2
Actuarial(gains)/ losses	(303)	(3.6)	(252.4)
Benefits paid	(1,968)	(23.6)	(1,116.7)
Projected benefit obligation, end of the period	17,591.9	211.1	11,491.6	10,688.7
Change in plan assets:
Fair value of plan assets, beginning of the period	10,916.1	131	10,019.3
Fair value of plan assets - Addition on account of acquisition of HDFC Ltd	5,121.2	61.4
Expected return on plan assets	1,036.1	12.4	668.2	574.1
Actuarial gains/(losses)	2,893.5	34.7	(390)
Actual return on plan assets	3,929.6	47.1	278.2
Employer contributions	717.9	8.6	1,735.3
Benefits paid	(1,733)	(20.8)	(1,116.7)
Fair value of plan assets, end of the period	18,951.8	$ 227.3	10,916.1	₨ 10,019.3
Funded Status	₨ 1,359.9		₨ (575.5)		$ 16.2

Net Gratuity Cost (Detail)

Net Gratuity Cost (Detail) - Gratuity ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)	Mar. 31, 2022 INR (₨)
Defined Benefit Plan Disclosure [Line Items]
Service cost	₨ 1,968.8	$ 23.6	₨ 1,398.6	₨ 1,268
Interest cost	981.3	11.8	773.4	631.2
Expected return on plan assets	(1,036.1)	(12.4)	(668.2)	(574.1)
Actuarial (gains)/losses	(3,196.5)	(38.4)	137.6	(497.7)
Net gratuity cost	₨ (1,282.5)	$ (15.4)	₨ 1,641.4	₨ 827.4

Assumptions Used in Accounting

Assumptions Used in Accounting for Gratuity Plan (Detail) - Gratuity		12 Months Ended
		Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Minimum
Defined Benefit Plan Disclosure [Line Items]
Discount rate - benefit obligations	[1]	7.20%	5.10%	5.10%
Discount rate - net periodic benefit cost	[1]	7.20%	5.10%	5.10%
Rate of increase in compensation levels of covered employees		3%	6%	6%
Rate of return on plan assets		6.50%	5.10%	5.10%
Maximum
Defined Benefit Plan Disclosure [Line Items]
Discount rate - benefit obligations	[1]	8.30%	7.90%	7.30%
Discount rate - net periodic benefit cost	[1]	8.30%	7.90%	7.30%
Rate of increase in compensation levels of covered employees		15%	11%	11%
Rate of return on plan assets		7.40%	7.20%	7%
[1]Weighted average assumptions used to determine both benefit obligations and net periodic benefit cost.

Benefit Payments, Gratuity (Det

Benefit Payments, Gratuity (Detail) - Gratuity ₨ in Millions	Mar. 31, 2024 INR (₨)
Benefit payments
2025	₨ 2,261.8
2026	1,718.4
2027	1,575
2028	1,497.5
2029	1,384.2
2030 - 2034	₨ 6,572.2

Plan Assets as Percentage of To

Plan Assets as Percentage of Total Funds (Detail) - Gratuity	Mar. 31, 2024
Funds managed by insurance company (1)
Defined Benefit Plan Disclosure [Line Items]
Plan asset as percentage of total funds	100%
Funds managed by insurance company (1) | Government Securities
Defined Benefit Plan Disclosure [Line Items]
Plan asset as percentage of total funds	77.20%
Funds managed by insurance company (1) | Debenture and bonds
Defined Benefit Plan Disclosure [Line Items]
Plan asset as percentage of total funds	4.50%
Funds managed by insurance company (1) | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Plan asset as percentage of total funds	10.30%
Funds managed by insurance company (1) | Other
Defined Benefit Plan Disclosure [Line Items]
Plan asset as percentage of total funds	8%
Funds managed by insurance company (2)
Defined Benefit Plan Disclosure [Line Items]
Plan asset as percentage of total funds	100%
Funds managed by insurance company (2) | Government Securities
Defined Benefit Plan Disclosure [Line Items]
Plan asset as percentage of total funds	46.90%
Funds managed by insurance company (2) | Debenture and bonds
Defined Benefit Plan Disclosure [Line Items]
Plan asset as percentage of total funds	12.90%
Funds managed by insurance company (2) | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Plan asset as percentage of total funds	39.20%
Funds managed by insurance company (2) | Other
Defined Benefit Plan Disclosure [Line Items]
Plan asset as percentage of total funds	1%
Funds managed by trust
Defined Benefit Plan Disclosure [Line Items]
Plan asset as percentage of total funds	100%
Funds managed by trust | Government Securities
Defined Benefit Plan Disclosure [Line Items]
Plan asset as percentage of total funds	45.60%
Funds managed by trust | Debenture and bonds
Defined Benefit Plan Disclosure [Line Items]
Plan asset as percentage of total funds	32.80%
Funds managed by trust | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Plan asset as percentage of total funds	15.60%
Funds managed by trust | Other
Defined Benefit Plan Disclosure [Line Items]
Plan asset as percentage of total funds	6%

Funded Status of Pension Plan a

Funded Status of Pension Plan and Amounts Recognized in Bank's Financial Statements (Detail) - Pension ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)	Mar. 31, 2022 INR (₨)	Mar. 31, 2024 USD ($)
Change in benefit obligations:
Projected benefit obligation ("PBO"), beginning of the period	₨ 1,018	$ 12.2	₨ 840.9
Plan amendment (prior service cost)	0	0	0
Service cost	16	0.2	18.5
Interest cost	76.4	0.9	57.3	₨ 55.8
Actuarial (gains)/losses	(24.6)	(0.3)	221.4
Benefits paid	(98.5)	(1.2)	(120.1)
Projected benefit obligation, end of the period	987.3	11.8	1,018	840.9
Change in plan assets:
Fair value of plan assets, beginning of the period	3	0	8.7
Expected return on plan assets	6.5	0.1	0.4	0.4
Actuarial gains/(losses)	8.8	0.1	2.2
Actual return on plan assets	15.3	0.2	2.6
Employer contributions	241.7	2.9	111.8
Benefits paid	(98.5)	(1.2)	(120.1)
Fair value of plan assets, end of the period	161.5	$ 1.9	3	₨ 8.7
Funded Status	₨ (825.8)		₨ (1,015)		$ (9.9)

Net Pension Cost (Detail)

Net Pension Cost (Detail) - Pension ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)	Mar. 31, 2022 INR (₨)
Defined Benefit Plan Disclosure [Line Items]
Service cost	₨ 16	$ 0.2	₨ 18.5	₨ 93
Interest cost	76.4	0.9	57.3	55.8
Expected return on plan assets	(6.5)	(0.1)	(0.4)	(0.4)
Actuarial (gains)/losses	(33.4)	(0.4)	219.2	32.1
Net pension cost	₨ 52.5	$ 0.6	₨ 294.6	₨ 180.5

Assumptions Used in Accountin_2

Assumptions Used in Accounting for Pension Plan (Detail) - Pension		12 Months Ended
		Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Discount rate - net periodic benefit cost	[1]	7.70%	7.90%	7.30%
Rate of increase in compensation levels of covered employees		7%	10%	7%
Rate of return on plan assets		6.50%	6.50%	6.50%
[1]Weighted average assumptions used to determine both benefit obligations and net periodic benefit cost.

Benefit Payments, Pension (Deta

Benefit Payments, Pension (Detail) - Pension ₨ in Millions	Mar. 31, 2024 INR (₨)
Benefit payments
2025	₨ 94.9
2026	72.1
2027	80.3
2028	81.8
2029	76.8
2030 - 2034	₨ 756.9

Weighted-Average Asset Allocati

Weighted-Average Asset Allocation of Said Plan Assets for Pension Benefits (Detail) - Pension	Mar. 31, 2024
Funds managed by trust
Weighted-average asset allocation	100%
Government Securities
Funds managed by trust
Weighted-average asset allocation	89.60%
Debenture and bonds
Funds managed by trust
Weighted-average asset allocation	10.40%
Other
Funds managed by trust
Weighted-average asset allocation	0%

Plan Investment Assets for Grat

Plan Investment Assets for Gratuity Funds and Pension Fund Measured at Fair Value by Level and in Total (Detail) ₨ in Millions, $ in Millions	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)
Fair Value Measurements Using Quoted Prices In Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Plan investment assets at fair value	₨ 581.9	$ 7	₨ 109.6
Fair Value Measurements Using Quoted Prices In Active Markets for Identical Assets (Level 1) | Funds managed by insurance company (1)
Defined Benefit Plan Disclosure [Line Items]
Plan investment assets at fair value	0		0
Fair Value Measurements Using Quoted Prices In Active Markets for Identical Assets (Level 1) | Funds managed by insurance company (2)
Defined Benefit Plan Disclosure [Line Items]
Plan investment assets at fair value	0		0
Fair Value Measurements Using Quoted Prices In Active Markets for Identical Assets (Level 1) | Government Securities Managed by Trust
Defined Benefit Plan Disclosure [Line Items]
Plan investment assets at fair value	0		0
Fair Value Measurements Using Quoted Prices In Active Markets for Identical Assets (Level 1) | Debenture and Bonds Managed by Trust
Defined Benefit Plan Disclosure [Line Items]
Plan investment assets at fair value	0		0
Fair Value Measurements Using Quoted Prices In Active Markets for Identical Assets (Level 1) | Other Funds Managed by Trust
Defined Benefit Plan Disclosure [Line Items]
Plan investment assets at fair value	581.9		109.6
Fair Value Measurements Using Significant other observable inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Plan investment assets at fair value	17,672.3	212.1	9,945
Fair Value Measurements Using Significant other observable inputs (Level 2) | Funds managed by insurance company (1)
Defined Benefit Plan Disclosure [Line Items]
Plan investment assets at fair value	0		0
Fair Value Measurements Using Significant other observable inputs (Level 2) | Funds managed by insurance company (2)
Defined Benefit Plan Disclosure [Line Items]
Plan investment assets at fair value	14,478.3		9,829.4
Fair Value Measurements Using Significant other observable inputs (Level 2) | Government Securities Managed by Trust
Defined Benefit Plan Disclosure [Line Items]
Plan investment assets at fair value	1,792.6		60.8
Fair Value Measurements Using Significant other observable inputs (Level 2) | Debenture and Bonds Managed by Trust
Defined Benefit Plan Disclosure [Line Items]
Plan investment assets at fair value	1,200.9		54.8
Fair Value Measurements Using Significant other observable inputs (Level 2) | Other Funds Managed by Trust
Defined Benefit Plan Disclosure [Line Items]
Plan investment assets at fair value	200.5		0
Fair Value Measurements Using Significant unobservable inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Plan investment assets at fair value	859.1	$ 10.4	864.5
Fair Value Measurements Using Significant unobservable inputs (Level 3) | Funds managed by insurance company (1)
Defined Benefit Plan Disclosure [Line Items]
Plan investment assets at fair value	859.1		864.5
Fair Value Measurements Using Significant unobservable inputs (Level 3) | Funds managed by insurance company (2)
Defined Benefit Plan Disclosure [Line Items]
Plan investment assets at fair value	0		0
Fair Value Measurements Using Significant unobservable inputs (Level 3) | Government Securities Managed by Trust
Defined Benefit Plan Disclosure [Line Items]
Plan investment assets at fair value	0		0
Fair Value Measurements Using Significant unobservable inputs (Level 3) | Debenture and Bonds Managed by Trust
Defined Benefit Plan Disclosure [Line Items]
Plan investment assets at fair value	0		0
Fair Value Measurements Using Significant unobservable inputs (Level 3) | Other Funds Managed by Trust
Defined Benefit Plan Disclosure [Line Items]
Plan investment assets at fair value	₨ 0		₨ 0

Reconciliation of All Plan Inve

Reconciliation of All Plan Investment Assets Measured at Fair Value Using Significant Unobservable Inputs (Level 3) (Detail) - Plan investment funds managed by insurance companies ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)
Defined Benefit Plan Disclosure [Line Items]
Beginning balance	₨ 864.5	$ 10.4	₨ 779.8
On merger of eHDFC	25.1	0.3	0
Realized interest credited to fund	64	0.8	54.8
Contribution during the period	70.9	0.9	148.6
Amount paid towards claim	(165.4)	(2)	(118.7)
Ending Balance	₨ 859.1	$ 10.4	₨ 864.5

Aggregate Notional Principal Am

Aggregate Notional Principal Amounts of Bank's Outstanding Forward Exchange and Derivative Contracts (Detail) ₨ in Millions, $ in Millions	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)
Derivatives, Fair Value [Line Items]
Notional	₨ 21,269,897.6	$ 255,218.3	₨ 15,796,689
Gross Assets	109,038.5	1,308.4	121,749.4
Gross Liabilities	109,409.9	1,312.8	98,783.5
Net Fair Value	(371.4)	(4.4)	22,965.9
Interest rate derivatives
Derivatives, Fair Value [Line Items]
Notional	7,834,342.2	94,004.6	5,974,019.2
Gross Assets	53,970.3		41,148.2
Gross Liabilities	63,112.8		36,627.4
Net Fair Value	(9,142.5)	(109.7)	4,520.8
Forward rate agreements
Derivatives, Fair Value [Line Items]
Notional	592,414.5	7,108.4	140,693
Gross Assets	10,071.3		1,848.4
Gross Liabilities	4,514.9		541.4
Net Fair Value	5,556.4	66.7	1,307
Currency options
Derivatives, Fair Value [Line Items]
Notional	223,904.8	2,686.6	257,641.1
Gross Assets	588.1		1,402.4
Gross Liabilities	873.2		1,578.3
Net Fair Value	(285.1)	(3.4)	(175.9)
Currency swaps
Derivatives, Fair Value [Line Items]
Notional	493,708.2	5,924	372,114.3
Gross Assets	11,754.5		21,753.7
Gross Liabilities	4,440.2		7,213.4
Net Fair Value	7,314.3	87.8	14,540.3
Forward exchange contracts
Derivatives, Fair Value [Line Items]
Notional	12,125,527.9	145,494.7	9,052,221.4
Gross Assets	32,654.3		55,596.7
Gross Liabilities	36,468.8		52,823
Net Fair Value	₨ (3,814.5)	$ (45.8)	₨ 2,773.7

Information Related to Derivati

Information Related to Derivative Amounts Recognized in Income (Detail) ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)	Mar. 31, 2022 INR (₨)
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives gain/(loss), net	₨ 18,558.5	$ 222.7	₨ 15,366.1	₨ 1,422
Interest rate derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives gain/(loss), net	1,762.6	21.2	5,921.5	3,207.7
Forward rate agreements
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives gain/(loss), net	2,089.6	25.1	(2)	1,374.1
Currency options
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives gain/(loss), net	194	2.3	1,200.3	167.3
Currency swaps
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives gain/(loss), net	10,242.9	122.9	1,609.1	(1,682)
Forward exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives gain/(loss), net	₨ 4,269.4	$ 51.2	₨ 6,637.2	₨ (1,645.1)

Amounts Subject to Enforceable

Amounts Subject to Enforceable Netting Arrangements (Detail) ₨ in Millions, $ in Millions		Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)
Derivative [Line Items]
Derivative assets, gross amounts		₨ 109,038.5	$ 1,308.4	₨ 121,749.4
Derivative assets, amounts offset		0		0
Derivative assets, net amounts reported in the balance sheet		109,038.5		121,749.4
Derivative assets, financial instruments		58,377.4		73,045.2
Derivative assets, financial collateral	[1]	15,690.4		19,402.2
Derivative assets, net amount		34,970.7	419.6	29,302
Securities purchased under agreements to resell, gross amounts		34,178.3	410.1	455,275.4
Securities purchased under agreements to resell, amounts offset		0		0
Securities purchased under agreements to resell, net amounts reported in the balance sheet		34,178.3		455,275.4
Securities purchased under agreements to resell, financial instruments		0		0
Securities purchased under agreements to resell, financial collateral	[1]	34,178.3		455,275.4
Securities purchased under agreements to resell, net amount		0	0	0
Derivative liabilities, gross amounts		109,409.9	1,312.8	98,783.5
Derivative liabilities, amounts offset		0		0
Derivative liabilities, net amounts reported in the balance sheet		109,409.9		98,783.5
Derivative liabilities, financial instruments		58,377.4		73,045.2
Derivative liabilities, financial collateral	[1]	24,274.5		5,084.6
Derivative liabilities, net amount		26,758	321.1	20,653.7
Securities sold under repurchase agreements, gross amounts		56,541	678.4	0
Securities sold under repurchase agreements, amounts offset		0		0
Securities sold under repurchase agreements, net amounts reported in the balance sheet		56,541		0
Securities sold under repurchase agreements, financial instruments		0		0
Securities sold under repurchase agreements, financial collateral	[1]	56,541		0
Securities sold under repurchase agreements, net amount		₨ 0	$ 0	0
Long Term debt , gross amounts				90,200
Long Term debt , Amounts offset				0
Long Term debt ,Net amounts reported in the balance sheet				90,200
Long Term debt , Financial instruments				0
Long Term debt , Financial collateral	[1]			90,200
Long Term debt , Net amount				₨ 0
Derivative Asset, Statement of Financial Position [Extensible Enumeration]		Other assets	Other assets
Derivative Liability, Statement of Financial Position [Extensible Enumeration]		Accrued expenses and other liabilities	Accrued expenses and other liabilities
[1]Comprised of securities and cash collaterals. These amounts are limited to the asset/liability balance, and accordingly, do not include excess collateral received/pledged.

Financial Instruments - Additio

Financial Instruments - Additional Information (Detail) ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)
Financial Instruments [Line Items]
Estimated fair values of bank guarantees	₨ 10,085.1	$ 121	₨ 7,911.1
Margins in the form of cash and fixed deposit available to the bank to reimburse losses realized under guarantees	298,500		222,000
Outstanding Undrawn commitments to provide loans and financing to customers	1,175,500	14,100	372,300
Unconditional cancellable commitments	9,108,600	109,300	7,273,000
Guarantees
Financial Instruments [Line Items]
Estimated fair values of bank guarantees	₨ 9,066.2	$ 108.8	₨ 7,041.8
Minimum
Financial Instruments [Line Items]
Remaining tenure of guarantees outstanding	one day
Maximum
Financial Instruments [Line Items]
Remaining tenure of guarantees outstanding	30.3 years

Details of Guarantees and Docum

Details of Guarantees and Documentary Credits Outstanding (Detail) ₨ in Millions, $ in Millions	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)
Guarantor Obligations [Line Items]
Bank guarantees	₨ 1,973,917.9	$ 23,685.1	₨ 1,628,699.8
Estimated fair values of bank guarantees	(10,085.1)	(121)	(7,911.1)
Financial guarantees
Guarantor Obligations [Line Items]
Bank guarantees	610,381.3	7,324	494,191.3
Performance guarantees
Guarantor Obligations [Line Items]
Bank guarantees	653,452.8	7,840.8	519,953
Documentary credits
Guarantor Obligations [Line Items]
Bank guarantees	710,083.8	8,520.3	614,555.5
Estimated fair values of bank guarantees	(1,018.9)	(12.2)	(869.3)
Guarantees
Guarantor Obligations [Line Items]
Estimated fair values of bank guarantees	₨ (9,066.2)	$ (108.8)	₨ (7,041.8)

Summary of allowance for Credit

Summary of allowance for Credit Losses included in accrued expenses and other liabilities on Off-Balance sheet credit exposures and undrawn commitments (Detail) ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)
Schedule Of Allowance For Credit Losses OnOff BalanceSheet Credit Exposures And Undrawn Commitments [Abstract]
Allowance for credit losses, beginning of the period	₨ 5,818.7	$ 69.8	₨ 6,087.6
Net provision for credit exposures	1,421.8	17.1	(268.9)
Allowance for credit losses, end of the period	₨ 7,240.5	$ 86.9	₨ 5,818.7

Comparison of Fair Value and Ca

Comparison of Fair Value and Carrying Value of Financial Instruments (Detail) ₨ in Millions, $ in Millions		Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Jun. 30, 2023 INR (₨)	Jun. 30, 2023 USD ($)	Mar. 31, 2023 INR (₨)	Mar. 31, 2023 USD ($)	Mar. 31, 2022 INR (₨)	Mar. 31, 2021 INR (₨)
Financial Assets:
Cash and due from banks, and restricted cash		₨ 2,086,031.4	$ 25,030.4			₨ 1,387,395.2	$ 16,647.4	₨ 1,122,031.1	₨ 930,694.7
Investments held for trading		461,245.3	5,534.5			135,831.1
Investments available for sale debt securities		8,295,487.1	99,537.9			4,878,844
Securities purchased under agreements to resell		34,178.3	410.1			455,275.4
Loans		26,335,700.9	316,003.1			17,052,927.9
Accrued interest receivable		249,644.5	2,995.5			186,091.2
Separate account assets		955,416.3	11,464.1			0
Other assets		1,942,177.5	23,304.3			1,292,086.7
Financial Liabilities :
Interest-bearing deposits		20,688,406.2	248,241			16,097,459.3
Non-interest-bearingdeposits		3,079,829.4	36,955			2,729,176.3
Securities sold under repurchase agreements		56,541	678.4			0
Short-term borrowings		1,313,737.1	15,763.6			1,089,897.5
Accrued interest payable		238,638.8	2,863.4			112,463.2
Long-term debt		6,648,772	79,778.9			2,054,436.4
Accrued expenses and other liabilities		690,851.5	8,289.6			567,643.6
Separate account liabilities		955,416.3	11,464.1	₨ 857,528.7	$ 10,289.5	0
Liabilities on policies in force	[1]	55,544.1	666.5			0
Financial Assets:
Cash and due from banks, and restricted cash		2,086,031.4	25,030.4			1,387,395.2
Investments held for trading		461,245.3	5,534.5			135,831.1
Investments available for sale debt securities		8,295,487.1	99,537.9			4,878,844
Securities purchased under agreements to resell		34,178.3	410.1			455,275.4
Loans		26,413,971.9	316,942.3			17,165,284.8
Accrued interest receivable		249,644.5	2,995.5			186,091.2
Separate account assets		955,416.3	11,464.1			0
Other assets		1,939,683.8	23,274.3			1,289,842.7
Financial Liabilities :
Securities sold under repurchase agreements		56,541	678.4			0
Short-term borrowings		1,314,424.4	15,771.8			1,088,380.5
Accrued interest payable		238,638.8	2,863.4			112,463.2
Long-term debt		6,639,457.7	79,667.1			2,045,541.9
Accrued expenses and other liabilities		690,851.5	8,289.6			567,643.6
Separate account liabilities		955,416.3	11,464.1			0
Liabilities on policies in force	[1]	55,544.1	666.5			0
Interest Bearing Deposits Liabilities
Financial Liabilities :
Interest-bearing deposits		20,775,875.4	249,290.6			16,102,822
Non-interest-bearing deposits
Financial Liabilities :
Interest-bearing deposits		3,079,829.4	$ 36,955			2,729,176.3
Fair Value Measurements Using Quoted Prices In Active Markets for Identical Assets (Level 1)
Financial Assets:
Investments held for trading		290,951.1				184.1
Investments available for sale debt securities		548,944.7				507,504.1
Separate account assets		808,309.4				0
Financial Assets:
Cash and due from banks, and restricted cash		2,086,031.4				1,387,395.2
Investments held for trading		290,951.1				184.1
Investments available for sale debt securities		548,944.7				507,504.1
Securities purchased under agreements to resell		0				0
Loans		0				0
Accrued interest receivable		0				0
Separate account assets		808,309.4				0
Other assets		24,545.8				3,313.7
Financial Liabilities :
Securities sold under repurchase agreements		0				0
Short-term borrowings		0				0
Accrued interest payable		0				0
Long-term debt		0				0
Accrued expenses and other liabilities		0				0
Separate account liabilities		0				0
Liabilities on policies in force	[1]	0				0
Fair Value Measurements Using Quoted Prices In Active Markets for Identical Assets (Level 1) | Interest Bearing Deposits Liabilities
Financial Liabilities :
Interest-bearing deposits		0				0
Fair Value Measurements Using Quoted Prices In Active Markets for Identical Assets (Level 1) | Non-interest-bearing deposits
Financial Liabilities :
Interest-bearing deposits		0				0
Fair Value Measurements Using Significant other observable inputs (Level 2)
Financial Assets:
Investments held for trading		148,296.2				135,647
Investments available for sale debt securities		7,608,007.7				4,222,904.3
Separate account assets		147,106.9				0
Financial Assets:
Cash and due from banks, and restricted cash		0				0
Investments held for trading		148,296.2				135,647
Investments available for sale debt securities		7,608,007.7				4,222,904.3
Securities purchased under agreements to resell		34,178.3				455,275.4
Loans		4,988,245.6				4,138,188.7
Accrued interest receivable		249,592				186,091.2
Separate account assets		147,106.9				0
Other assets		1,913,303.2				1,286,529
Financial Liabilities :
Securities sold under repurchase agreements		56,541				0
Short-term borrowings		1,314,424.4				1,088,380.5
Accrued interest payable		238,638.8				112,463.2
Long-term debt		6,639,457.7				2,045,541.9
Accrued expenses and other liabilities		688,513.7				567,643.6
Separate account liabilities		955,416.3				0
Liabilities on policies in force	[1]	55,544.1				0
Fair Value Measurements Using Significant other observable inputs (Level 2) | Interest Bearing Deposits Liabilities
Financial Liabilities :
Interest-bearing deposits		20,775,875.4				16,102,822
Fair Value Measurements Using Significant other observable inputs (Level 2) | Non-interest-bearing deposits
Financial Liabilities :
Interest-bearing deposits		3,079,829.4				2,729,176.3
Fair Value Measurements Using Significant unobservable inputs (Level 3)
Financial Assets:
Investments held for trading		21,998				0
Investments available for sale debt securities		138,534.7				148,435.6
Separate account assets		0				0
Financial Assets:
Cash and due from banks, and restricted cash		0				0
Investments held for trading		21,998				0
Investments available for sale debt securities		138,534.7				148,435.6
Securities purchased under agreements to resell		0				0
Loans		21,425,726.3				13,027,096.1
Accrued interest receivable		52.5				0
Separate account assets		0				0
Other assets		1,834.8				0
Financial Liabilities :
Securities sold under repurchase agreements		0				0
Short-term borrowings		0				0
Accrued interest payable		0				0
Long-term debt		0				0
Accrued expenses and other liabilities		2,337.8				0
Separate account liabilities		0				0
Liabilities on policies in force	[1]	0				0
Fair Value Measurements Using Significant unobservable inputs (Level 3) | Interest Bearing Deposits Liabilities
Financial Liabilities :
Interest-bearing deposits		0				0
Fair Value Measurements Using Significant unobservable inputs (Level 3) | Non-interest-bearing deposits
Financial Liabilities :
Interest-bearing deposits		₨ 0				₨ 0
[1]The liabilities on policies in force includes only the fair value of contracts that are classified as insurance contract

Segment Information - Additiona

Segment Information - Additional Information (Detail)	12 Months Ended
	Mar. 31, 2024 Segment
Reportable segments	5

Summarized Segment Information

Summarized Segment Information (Detail) ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)	Mar. 31, 2022 INR (₨)	Mar. 31, 2024 USD ($)
Segment Reporting Information [Line Items]
Net interest income/(expense)	₨ 1,248,003.4	$ 14,974.9	₨ 913,988.5	₨ 748,839.5
Less: Provision for credit losses	133,063.1	1,596.6	74,213.8	126,979.5
Net interest revenue, after provision for credit losses	1,114,940.3	13,378.3	839,774.7	621,860
Non-interest revenue	738,930.9	8,866.5	291,386.5	270,574.2
Non-interest expense	(1,148,412.2)	(13,779.8)	(468,779.4)	(373,272)
Income before income tax expense	705,459	8,465	662,381.8	519,162.2
Income tax expense	77,827.1	933.9	166,117.4	132,559.2
Segment assets:
Segment total assets	44,118,573		25,755,624	21,113,705.5	$ 529,380.6
Operating Segments
Segment Reporting Information [Line Items]
Net interest income/(expense)	1,248,003.4	14,974.9	913,988.5	748,839.5
Intersegment Eliminations
Segment Reporting Information [Line Items]
Net interest income/(expense)	0	$ 0	0	0
Retail Banking
Segment Reporting Information [Line Items]
Net interest income/(expense)	802,998.2		643,295.7	559,824.2
Less: Provision for credit losses	118,900		86,920.2	122,622.6
Net interest revenue, after provision for credit losses	684,098.2		556,375.5	437,201.6
Non-interest revenue	276,151.7		252,576.6	203,468.5
Non-interest expense	(548,753.1)		(432,689.9)	(345,321.5)
Income before income tax expense	411,496.8		376,262.2	295,348.6
Segment assets:
Segment total assets	23,256,928.8		13,599,750.2	11,384,802.9
Retail Banking | Operating Segments
Segment Reporting Information [Line Items]
Net interest income/(expense)	624,203.3		474,489.5	418,823
Retail Banking | Intersegment Eliminations
Segment Reporting Information [Line Items]
Net interest income/(expense)	178,794.9		168,806.2	141,001.2
Wholesale Banking
Segment Reporting Information [Line Items]
Net interest income/(expense)	315,667.6		250,954.1	184,355
Less: Provision for credit losses	14,163.1		(12,706.4)	4,356.9
Net interest revenue, after provision for credit losses	301,504.5		263,660.5	179,998.1
Non-interest revenue	24,303.9		42,286.9	55,813.2
Non-interest expense	(84,735.1)		(34,261.7)	(25,544.1)
Income before income tax expense	241,073.3		271,685.7	210,267.2
Segment assets:
Segment total assets	13,133,744		9,274,409.1	8,106,671
Wholesale Banking | Operating Segments
Segment Reporting Information [Line Items]
Net interest income/(expense)	249,868.7		367,857.6	297,694
Wholesale Banking | Intersegment Eliminations
Segment Reporting Information [Line Items]
Net interest income/(expense)	65,798.9		(116,903.5)	(113,339)
Treasury Services
Segment Reporting Information [Line Items]
Net interest income/(expense)	20,712.9		19,738.7	4,660.3
Less: Provision for credit losses	0		0	0
Net interest revenue, after provision for credit losses	20,712.9		19,738.7	4,660.3
Non-interest revenue	11,784.3		(3,477)	11,292.5
Non-interest expense	(6,278.2)		(1,827.8)	(2,406.4)
Income before income tax expense	26,219		14,433.9	13,546.4
Segment assets:
Segment total assets	2,731,823.5		2,881,464.7	1,622,231.6
Treasury Services | Operating Segments
Segment Reporting Information [Line Items]
Net interest income/(expense)	265,306.7		71,641.4	32,322.5
Treasury Services | Intersegment Eliminations
Segment Reporting Information [Line Items]
Net interest income/(expense)	(244,593.8)		₨ (51,902.7)	₨ (27,662.2)
Insurance Services
Segment Reporting Information [Line Items]
Net interest income/(expense)	86,474.6
Less: Provision for credit losses	0
Net interest revenue, after provision for credit losses	86,474.6
Non-interest revenue	418,250
Non-interest expense	(493,763.8)
Income before income tax expense	10,960.8
Segment assets:
Segment total assets	4,387,398.1
Insurance Services | Operating Segments
Segment Reporting Information [Line Items]
Net interest income/(expense)	86,474.6
Insurance Services | Intersegment Eliminations
Segment Reporting Information [Line Items]
Net interest income/(expense)	0
Others
Segment Reporting Information [Line Items]
Net interest income/(expense)	22,150.1
Less: Provision for credit losses	0
Net interest revenue, after provision for credit losses	22,150.1
Non-interest revenue	8,441
Non-interest expense	(14,882)
Income before income tax expense	15,709.1
Segment assets:
Segment total assets	608,678.6
Others | Operating Segments
Segment Reporting Information [Line Items]
Net interest income/(expense)	22,150.1
Others | Intersegment Eliminations
Segment Reporting Information [Line Items]
Net interest income/(expense)	₨ 0

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)	Mar. 31, 2022 INR (₨)
Loss Contingencies [Line Items]
Capital commitments, estimated amounts of contracts remaining to be executed on the capital account	₨ 45,346.5		₨ 25,666
Additional operating lease commitments with leases which have not yet commenced	1,002.6
Operating lease expense	₨ 25,447.4	$ 305.3	16,164.9	₨ 14,295.7
Minimum [Member]
Loss Contingencies [Line Items]
Additional operating lease commitments with leases which have not yet commenced, lease term	2 years
Maximum [Member]
Loss Contingencies [Line Items]
Additional operating lease commitments with leases which have not yet commenced, lease term	21 years
Indirect Taxes And Other Claims
Loss Contingencies [Line Items]
Contingencies, estimated possible loss	₨ 38,498.3		₨ 9,456.9

Summary Of Operating Lease Righ

Summary Of Operating Lease Right Of Use Assets And Lease Liability (Detail) ₨ in Millions, $ in Millions	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)
Right-of-use assets	₨ 121,302.5	$ 1,455.5	₨ 89,989.3
Lease liabilities	₨ 131,043	$ 1,572.4	₨ 97,658.9

Rental Expenses and Sub-Lease I

Rental Expenses and Sub-Lease Income (Detail) ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)	Mar. 31, 2022 INR (₨)
Operating Leased Assets [Line Items]
The total minimum lease expense during the year recognized in the consolidated statement of income	₨ 23,245.5	$ 278.9	₨ 17,591.4	₨ 13,866.6

Future Minimum Lease Payments (

Future Minimum Lease Payments (Detail) ₨ in Millions, $ in Millions	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)
Operating Leased Assets [Line Items]
2025	₨ 20,541.8	$ 246.5
2026	20,162.6	241.9
2027	19,678.9	236.1
2028	18,817.6	225.8
2029	17,610.2	211.3
Thereafter	86,273.8	1,035.2
Total lease payments	183,084.9	2,196.8
Less: imputed interest	52,041.9	624.4
Total operating lease liabilities	₨ 131,043	$ 1,572.4	₨ 97,658.9
Weighted average remaining lease term (in years)	10 years 2 months 12 days	10 years 2 months 12 days
Weighted average discount rate	7.25%	7.25%

Movement in Provision for Credi

Movement in Provision for Credit Card and Debit Card Reward Points (Detail) - Debit and Credit Cards Reward Points ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)
Valuation and Qualifying Accounts Disclosure [Line Items]
Opening provision of reward points	₨ 6,963.2	$ 83.6	₨ 6,359.1
Provision made during the year	7,921.1	95	5,537.3
Utilization/write back of provision	(6,248.8)	(75)	(4,901.3)
Closing provision of reward points	8,635.5	103.6	6,963.2
Change in Rate of Accrual of Reward Points
Valuation and Qualifying Accounts Disclosure [Line Items]
Effect of change in rate of accrual of reward points	₨ 0	$ 0	₨ (31.9)

Balances Payable to Related Par

Balances Payable to Related Parties (Detail) ₨ in Millions, $ in Millions	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)
Related Party Transaction [Line Items]
Balances in non-interest-bearing deposits	₨ 3,079,829.4	$ 36,955	₨ 2,729,176.3
Balances in interest-bearing deposits	20,688,406.2	248,241	16,097,459.3
Principal Owner
Related Party Transaction [Line Items]
Balances in non-interest-bearing deposits	0		25,637.8
Balances in interest-bearing deposits	0		1,755.1
Accrued expenses and other liabilities	0		773.5
Total	0		28,166.4
Others
Related Party Transaction [Line Items]
Balances in non-interest-bearing deposits	2,522.6		8,715.1
Balances in interest-bearing deposits	4,006.3		1,611.9
Accrued expenses and other liabilities	0		0
Total	6,528.9		10,327
Related Party
Related Party Transaction [Line Items]
Balances in non-interest-bearing deposits	2,522.6	30.3	34,352.9
Balances in interest-bearing deposits	4,006.3	48.1	3,367
Accrued expenses and other liabilities	0	0	773.5
Total	₨ 6,528.9	$ 78.4	₨ 38,493.4

Balances Receivable from Relate

Balances Receivable from Related Parties (Detail) ₨ in Millions, $ in Millions	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)
Related Party Transaction [Line Items]
Total	₨ 129,187.8	$ 1,550.1	₨ 84,217.8
Principal Owner
Related Party Transaction [Line Items]
Loans	0		0
Other assets	0		748
Investments available for sale securities	0		0
Total	0		748
Others
Related Party Transaction [Line Items]
Loans	34,504.5		7.5
Other assets	1,878.6		2,167.3
Investments available for sale securities	28,364.6		0
Total	64,747.7		2,174.8
Related Party
Related Party Transaction [Line Items]
Loans	34,504.5	414	7.5
Other assets	1,878.6	22.5	2,915.3
Investments available for sale securities	28,364.6	340.3	0
Total	₨ 64,747.7	$ 776.8	₨ 2,922.8

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Detail) $ in Thousands, ₨ in Millions		12 Months Ended
	Jul. 01, 2023	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)	Mar. 31, 2022 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($)
Related Party Transaction [Line Items]
Purchase of investments from others		₨ 316.7		₨ 256.8
Sale of investments from others		8,859.5		20,447.7
Proceeds from issuance of long-term debt		1,155,775.2	$ 13,868,200	1,022,933.1	₨ 722,908.9
Dividend paid to principal owner		86,617.1	$ 1,039,300	86,394.3	₨ 36,239.2
Foreign exchange and derivative contracts, notional principal amount		21,269,897.6		15,796,689		$ 255,218,300
Bank guarantees		1,973,917.9		1,628,699.8		23,685,100
Percentage of Capital Acquired through amalgamation	100%
Tier II bonds
Related Party Transaction [Line Items]
Proceeds from issuance of long-term debt		10,241		7,850
Principal Owner
Related Party Transaction [Line Items]
Loans purchased from principal owner		116,320		369,101.3
Dividend paid to principal owner		0		13,401.5
Foreign exchange and derivative contracts, notional principal amount		0		94,451.2
Foreign exchange and derivative contracts, mark to market gains		0		2,081.2
Bank guarantees		0		3.5
Principal Owner | Property Plant and equipment
Related Party Transaction [Line Items]
Fixed assets purchased from related parties		0		0
Others
Related Party Transaction [Line Items]
Bank guarantees		2.5		₨ 5.1
HDFC ERGO [Member]
Related Party Transaction [Line Items]
Bank guarantees		₨ 2.5				$ 30	$ 30
Guarantee Obligations Period		10 years	10 years

Significant Transactions with R

Significant Transactions with Related Parties Included in Determination of Net Income (Detail) ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)	Mar. 31, 2022 INR (₨)
Related Party Transaction [Line Items]
Related party transaction revenues	₨ 2,781,926.2	$ 33,380.5	₨ 1,689,526.7	₨ 1,333,137
Interest expense-Deposits	(997,405.6)	(11,967.9)	(615,108.9)	(489,010.1)
Related party transaction non-interest expense	(1,069,242.4)	(12,829.8)	(468,779.4)	(373,272)
Interest Expenses-Others	3,815.9	45.8	698.7	155.9
Principal Owner
Related Party Transaction [Line Items]
Interest expense-Deposits	30.6		(95.3)	(204.3)
Interest Expenses-Others	0		0	0
Non-interest revenue-Others	0		0	0
Principal Owner | Non-Interest Revenue-Fees and Commissions
Related Party Transaction [Line Items]
Related party transaction revenues	1,670.2		5,888.2	4,639.3
Principal Owner | Interest and Dividend Revenue
Related Party Transaction [Line Items]
Related party transaction revenues	0		0	0
Principal Owner | Non-interest expense-Administrative and other
Related Party Transaction [Line Items]
Related party transaction non-interest expense	(2,424.6)		(8,631.1)	(7,182.4)
Principal Owner | Non-interest expense-Premises and equipment
Related Party Transaction [Line Items]
Related party transaction non-interest expense	(0.5)		(15.6)	(19.2)
Others
Related Party Transaction [Line Items]
Interest expense-Deposits	115.4		(606.1)	(82.2)
Interest Expenses-Others	514.7		0	0
Non-interest revenue-Others	78		0	0
Others | Non-Interest Revenue-Fees and Commissions
Related Party Transaction [Line Items]
Related party transaction revenues	8,205.3		26,766.6	22,939.5
Others | Interest and Dividend Revenue
Related Party Transaction [Line Items]
Related party transaction revenues	3,242.9		0.1	0.1
Others | Non-interest expense-Administrative and other
Related Party Transaction [Line Items]
Related party transaction non-interest expense	(4,140.1)		(5,524.8)	(4,558.9)
Others | Non-interest expense-Premises and equipment
Related Party Transaction [Line Items]
Related party transaction non-interest expense	(1.2)		0	0
Related Party
Related Party Transaction [Line Items]
Interest expense-Deposits	146	1.8	(701.4)	(286.5)
Interest Expenses-Others	514.7	6.2	0	0
Non-interest revenue-Others	78	0.9	0	0
Related Party | Non-Interest Revenue-Fees and Commissions
Related Party Transaction [Line Items]
Related party transaction revenues	9,875.5	118.5	32,654.8	27,578.8
Related Party | Interest and Dividend Revenue
Related Party Transaction [Line Items]
Related party transaction revenues	3,242.9	38.9	0.1	0.1
Related Party | Non-interest expense-Administrative and other
Related Party Transaction [Line Items]
Related party transaction non-interest expense	(6,564.7)	(78.8)	(14,155.9)	(11,741.3)
Related Party | Non-interest expense-Premises and equipment
Related Party Transaction [Line Items]
Related party transaction non-interest expense	₨ (1.7)	$ 0	₨ (15.6)	₨ (19.2)

Earnings Per Equity Share - Add

Earnings Per Equity Share - Additional Information (Detail) - ₨ / shares	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Required transfer of after tax Indian GAAP profit to a non-distributable statutory reserve in order to pay dividends without prior RBI approval	25%
Dividends declared		₨ 19	₨ 15.5
Employee Stock Option
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potential equity shares excluded from the calculation of diluted earnings per share, average outstanding balance	52,921,114	49,152,741	19,064,987
Indian GAAP [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Dividend payout, description of restrictions	As per the RBI guidelines, the dividend payout cannot exceed 35% of net income as calculated under Indian GAAP.
Indian GAAP [Member] | Maximum
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Dividend payout, maximum pay out as a percentage of net income calculated under Indian GAAP	35%

Weighted Average Number of Equi

Weighted Average Number of Equity Shares Used in Computing Earnings Per Equity Share (Detail) - shares	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Schedule of Weighted Average Number of Diluted Shares Outstanding [Line Items]
Weighted average number of equity shares used in computing basic earnings per equity share	7,079,296,055	5,565,620,562	5,533,113,800
Effect of potential equity shares for stock options outstanding	28,156,373	21,552,766	30,366,023
Weighted average number of equity shares used in computing diluted earnings per equity share	7,107,452,428	5,587,173,328	5,563,479,823

Reconciliations of Basic and Di

Reconciliations of Basic and Diluted Earnings Per Equity Share and Earnings per American Depositary Shares (Detail)	12 Months Ended
	Mar. 31, 2024 ₨ / shares	Mar. 31, 2024 $ / shares	Mar. 31, 2023 ₨ / shares	Mar. 31, 2022 ₨ / shares
Earnings Per Share Disclosure [Line Items]
Basic earnings per share | (per share)	₨ 88.66	$ 1.06	₨ 89.02	₨ 69.76
Effect of potential equity shares for stock options outstanding | (per share)	0.35	0.01	0.34	0.38
Diluted earnings per share | (per share)	88.31	1.05	88.68	69.38
Basic earnings per share | (per share)	265.98	3.18	267.06	209.28
Diluted earnings per share | (per share)	264.93	3.15	266.04	208.14
American Depository Shares | Stock Compensation Plan
Earnings Per Share Disclosure [Line Items]
Effect of potential equity shares for stock options outstanding | (per share)	₨ 1.05	$ 0.03	₨ 1.02	₨ 1.14

List of Subsidiaries (Detail)

List of Subsidiaries (Detail)	12 Months Ended
	Mar. 31, 2024
HDB Financial Services Limited
Schedule of Equity Method Investments [Line Items]
Background	A non-deposit taking non-banking finance company
The stake-holding of the Bank	95.20%
HDFC Securities Limited
Schedule of Equity Method Investments [Line Items]
Background	Offers trading facilities in a range of equity, fixed income and derivative products to its clients
The stake-holding of the Bank	95.40%
HDFC Life Insurance Company Limited
Schedule of Equity Method Investments [Line Items]
Background	Lender of long-term life insurance solutions provider in India, offering a range of individual and group insurance solutions
The stake-holding of the Bank	50.40%
HDFC Asset Management Company Limited
Schedule of Equity Method Investments [Line Items]
Background	Investment manager to HDFC Mutual Fund
The stake-holding of the Bank	52.50%
HDFC Sales Private Limited
Schedule of Equity Method Investments [Line Items]
Background	Strengthens the marketing and sales efforts by providing a dedicated sales force to sell home loans and other financial products, including public deposits
The stake-holding of the Bank	100%
HDFC Capital Advisors Limited
Schedule of Equity Method Investments [Line Items]
Background	Acts as an Investment Manager for Category II Alternative Investment Funds registered with Securities and Exchange Board of India
The stake-holding of the Bank	89%
HDFC Trustee Company Limited
Schedule of Equity Method Investments [Line Items]
Background	It provides Trusteeship services to HDFC Mutual Fund
The stake-holding of the Bank	100%
Griha Investment
Schedule of Equity Method Investments [Line Items]
Background	Acts as investment manager to HIREF International LLC (the “Fund”) and its Special Purpose Vehicles
The stake-holding of the Bank	100%
Griha Pte Limited
Schedule of Equity Method Investments [Line Items]
Background	Private Equity Fund Manager specializing in Real Estate Private Equity Investments in India. It is registered with the Monetary Authority of Singapore as a Fund Management Company
The stake-holding of the Bank	100%
HDFC Education and Development Services Private Limited
Schedule of Equity Method Investments [Line Items]
Background	The company is in the business of providing education management and consulting services. As directed by the RBI in connection with the Transaction, HEADS is expected to be fully divested no later than July 1, 2025
The stake-holding of the Bank	100%

List of Affiliates (Detail)

List of Affiliates (Detail) - HDFC ERGO General Insurance Company Limited	12 Months Ended
	Mar. 31, 2024
Equity and Non Equity Ownership Interests [Line Items]
Equity method investment, description of principal activities	ERGO offers a complete range of general insurance products.
Equity method investment, ownership percentage	50.50%

Investments Measured at Fair Va

Investments Measured at Fair Value on Recurring Basis (Detail) ₨ in Millions, $ in Millions		Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading account securities		₨ 461,245.3	$ 5,534.5	₨ 135,831.1
Securities Available-for-Sale		8,295,487.1	99,537.9	4,878,844
Separate Account Assets		955,416.3	11,464.1	0
Fair Value Measurements Using Quoted Prices In Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading account securities		290,951.1		184.1
Securities Available-for-Sale		548,944.7		507,504.1
Separate Account Assets		808,309.4		0
Fair Value Measurements Using Significant other observable inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading account securities		148,296.2		135,647
Securities Available-for-Sale		7,608,007.7		4,222,904.3
Separate Account Assets		147,106.9		0
Fair Value Measurements Using Significant unobservable inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading account securities		21,998		0
Securities Available-for-Sale		138,534.7		148,435.6
Separate Account Assets		0		0
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading account securities		461,245.3		135,831.1
Securities Available-for-Sale		8,295,487.1		4,878,844
Equity securities	[1]	71,449.1		19,462.6
Separate Account Assets		955,416.3
Total				5,034,137.7
Total		9,783,597.8	117,393.8
Liabilities on policies in force		237.2
Total		237.2	2.8
Fair Value, Measurements, Recurring | Fair Value Measurements Using Quoted Prices In Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading account securities		290,951.1		184.1
Securities Available-for-Sale		548,944.7		507,504.1
Equity securities	[1]	24,545.8		3,313.7
Separate Account Assets		808,309.4
Total				511,001.9
Total		1,672,751	20,071.4
Liabilities on policies in force		0
Total		0	0
Fair Value, Measurements, Recurring | Fair Value Measurements Using Significant other observable inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading account securities		148,296.2		135,647
Securities Available-for-Sale		7,608,007.7		4,222,904.3
Equity securities	[1]	46,571		16,148.9
Separate Account Assets		147,106.9
Total				4,374,700.2
Total		7,949,981.8	95,392.2
Liabilities on policies in force		237.2
Total		237.2	2.8
Fair Value, Measurements, Recurring | Fair Value Measurements Using Significant unobservable inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading account securities		21,998		0
Securities Available-for-Sale		138,534.7		148,435.6
Equity securities	[1]	332.3		0
Separate Account Assets		0
Total				₨ 148,435.6
Total		160,865	1,930.2
Liabilities on policies in force		₨ 0
Total | $			$ 0
[1]Equity securities classified within other assets.

Information about Changes in Fa

Information about Changes in Fair Value of Level 3 Assets (Detail) - Available-for-Sale Debt Securities - INR (₨) ₨ in Millions	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	₨ 148,435.6	₨ 143,894.7
Total gains or losses (realized/unrealized) — Included in net income	614.5	0
Total gains or losses (realized/unrealized) — Included in other comprehensive income	1,531.8	(2,776.3)
Purchases/additions	113,003.2	110,969.4
Sales	(619.8)	0
Issuances	0	0
Settlements	(101,447.7)	(103,652.2)
Transfers into Level 3	0	0
Transfers out of Level 3	(652.6)	0
Foreign currency translation adjustment	0	0
Ending Balance	160,865	148,435.6
Total amount of gains/ (losses) included in net income attributable to change in unrealized gains/ (losses) relating to assets still held at reporting date	650.2	0
Change in unrealized gains/ (losses) for the period included in other comprehensive income for assets held at the end of the reporting period	₨ 1,196.9	₨ (1,867.6)

Derivative Instruments Measured

Derivative Instruments Measured at Fair Value on Recurring Basis (Detail) ₨ in Millions, $ in Millions	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	₨ 109,038.5	$ 1,308.4	₨ 121,749.4
Derivative liabilities	109,409.9	$ 1,312.8	98,783.5
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	109,038.5		121,749.4
Derivative liabilities	109,409.9		98,783.5
Fair Value, Measurements, Recurring | Fair Value Measurements Using Quoted Prices In Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0		0
Derivative liabilities	0		0
Fair Value, Measurements, Recurring | Fair Value Measurements Using Significant other observable inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	109,038.5		121,749.4
Derivative liabilities	109,409.9		98,783.5
Fair Value, Measurements, Recurring | Fair Value Measurements Using Significant unobservable inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0		0
Derivative liabilities	₨ 0		₨ 0

Subsequent Events - Additional

Subsequent Events - Additional Information (Detail) - Dividend Paid [Member] - Subsequent Event [Member] ₨ / shares in Units, ₨ in Millions	Apr. 20, 2024 INR (₨) ₨ / shares
Subsequent Event [Line Items]
Dividend paid, per share amount | ₨ / shares	₨ 19.5
Dividend paid, total amount | ₨	₨ 148,139.8