Prosper Marketplace 10-K 29 Mar 23 2022 FY Annual report Financial data

Cover Page

Cover Page - USD ($)	12 Months Ended
	Dec. 31, 2022	Mar. 27, 2023	Jun. 30, 2022
Entity Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2022
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity Registrant Name	PROSPER MARKETPLACE, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	73-1733867
Entity File Number	333-257739
Entity Address, Address Line One	221 Main Street
Entity Address, Address Line Two	3rd Floor
Entity Address, City or Town	San Francisco
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94105
City Area Code	415
Local Phone Number	593-5400
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		75,218,262
Entity Public Float			$ 0
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Central Index Key	0001416265
Prosper Funding LLC
Entity Information [Line Items]
Current Fiscal Year End Date	--12-31
Entity Registrant Name	PROSPER FUNDING LLC
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	45-4526070
Entity File Number	333-257739-01
Entity Address, Address Line One	221 Main Street
Entity Address, Address Line Two	3rd Floor
Entity Address, City or Town	San Francisco
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94105
City Area Code	415
Local Phone Number	593-5400
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		0
Entity Central Index Key	0001542574

Audit Information

Audit Information	12 Months Ended
	Dec. 31, 2022
Audit Information [Abstract]
Auditor Name	DELOITTE & TOUCHE LLP
Auditor Location	San Francisco, CA
Auditor Firm ID	34

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands		Dec. 31, 2022	Dec. 31, 2021
Assets:
Cash and Cash Equivalents		$ 83,446	$ 67,700
Restricted Cash	[1]	113,163	167,925
Accounts Receivable	[1]	3,462	1,054
Loans Held for Sale, at Fair Value	[1]	499,765	243,170
Borrower Loans, at Fair Value	[1]	320,642	267,626
Property and Equipment, Net		38,814	29,714
Prepaid and Other Assets	[1]	9,208	6,231
Credit Card Derivative		10,782	7
Servicing Assets		12,562	8,761
Goodwill		36,368	36,368
Intangible Assets, Net		192	328
Total Assets		1,128,404	828,884
Liabilities, Convertible Preferred Stock and Stockholders' Deficit:
Accounts Payable and Accrued Liabilities		37,254	25,790
Payable to Investors		85,312	152,794
Notes, at Fair Value		318,704	265,985
Warehouse Lines	[1]	446,762	209,275
Term Loan		73,407	0
Other Liabilities		28,258	23,900
Convertible Preferred Stock Warrant Liability		166,346	250,941
Total Liabilities		1,156,043	928,685
Commitments and Contingencies (see Note 16)
Stockholders' Deficit:
Common Stock – $0.01 par value; 625,000,000 shares authorized; 75,223,850 shares issued and 74,287,915 shares outstanding as of December 31, 2022; 73,089,929 shares issued and 72,153,994 shares outstanding as of December 31, 2021.		267	245
Additional Paid-In Capital		158,814	157,256
Less: Treasury Stock		(23,417)	(23,417)
Accumulated Deficit		(483,670)	(554,252)
Total Stockholders' Deficit		(348,006)	(420,168)
Total Liabilities, Convertible Preferred Stock and Stockholders' Deficit		1,128,404	828,884
Consolidated Entity, Excluding Consolidated VIE
Liabilities, Convertible Preferred Stock and Stockholders' Deficit:
Convertible preferred stock		(322,748)	(322,748)
VIE, Primary Beneficiary
Assets:
Restricted Cash		11,838	5,128
Loans Held for Sale, at Fair Value		499,765	243,170
Prepaid and Other Assets		3,210	2,846
Total Assets		514,813	251,144
Liabilities, Convertible Preferred Stock and Stockholders' Deficit:
Warehouse Lines		446,762	209,275
Total Liabilities		446,762	209,275
Convertible preferred stock		$ (2,381)	$ (2,381)
[1](1) Includes amounts in consolidated variable interest entities (VIEs) presented separately in the table below.

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Convertible preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Convertible preferred stock, authorized (in shares)	444,760,848	444,760,848
Convertible preferred stock, issued (in shares)	209,613,570	209,613,570
Convertible preferred stock, outstanding (in shares)	209,613,570	209,613,570
Liquidation Preference, Outstanding Shares	$ 370,456	$ 370,456
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized (in shares)	625,000,000	625,000,000
Common stock, issued (in shares)	75,223,850	73,089,929
Common stock, outstanding (in shares)	74,287,915	72,153,994
VIE, Primary Beneficiary
Convertible preferred stock, issued (in shares)	51,247,915	51,247,915
Convertible preferred stock, outstanding (in shares)	51,247,915	51,247,915

Consolidated Balance Sheets - P

Consolidated Balance Sheets - Prosper Funding LLC - USD ($) $ in Thousands		Dec. 31, 2022	Dec. 31, 2021
Assets:
Cash and Cash Equivalents		$ 83,446	$ 67,700
Restricted Cash	[1]	113,163	167,925
Borrower Loans, at Fair Value	[1]	320,642	267,626
Servicing Assets		12,562	8,761
Total Assets		1,128,404	828,884
Liabilities and Member's Equity:
Accounts Payable and Accrued Liabilities		37,254	25,790
Payable to Investors		85,312	152,794
Notes, at Fair Value		318,704	265,985
Other Liabilities		28,258	23,900
Total Liabilities		1,156,043	928,685
Stockholders' Deficit:
Accumulated Deficit		(483,670)	(554,252)
Total Stockholders' Deficit		(348,006)	(420,168)
Total Liabilities, Convertible Preferred Stock and Stockholders' Deficit		1,128,404	828,884
Prosper Funding LLC
Assets:
Cash and Cash Equivalents		6,285	10,765
Restricted Cash		91,564	157,111
Borrower Loans, at Fair Value		320,642	267,626
Property and Equipment, Net		10,004	7,907
Servicing Assets		14,860	9,796
Other Assets		84	317
Total Assets		443,439	453,522
Liabilities and Member's Equity:
Accounts Payable and Accrued Liabilities		4,576	1,818
Payable to Related Party		2,853	1,306
Payable to Investors		86,927	153,681
Notes, at Fair Value		318,704	265,985
Other Liabilities		3,608	2,434
Total Liabilities		416,668	425,224
Stockholders' Deficit:
Member's Equity		6,354	11,404
Accumulated Deficit		20,417	16,894
Total Stockholders' Deficit		26,771	28,298
Total Liabilities, Convertible Preferred Stock and Stockholders' Deficit		$ 443,439	$ 453,522
[1](1) Includes amounts in consolidated variable interest entities (VIEs) presented separately in the table below.

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating Revenues:
(Loss) Gain on Sale of Borrower Loans	$ (1,039)	$ 7,196	$ 4,816
Total Operating Revenues	183,268	115,576	93,379
Interest Income (Expense):
Interest Income on Borrower Loans and Loans Held for Sale	86,350	83,107	104,150
Interest Expense on Notes and Warehouse Lines	(60,025)	(50,816)	(60,127)
Total Interest Income, Net	26,325	32,291	44,023
Change in Fair Value of Financial Instruments	(9,712)	(3,241)	(34,166)
Total Net Revenue	199,881	144,626	103,236
Expenses:
Origination and Servicing	56,457	35,056	29,897
Sales and Marketing	81,896	35,065	29,259
General and Administrative	83,658	73,122	63,384
Change in Fair Value of Convertible Preferred Stock Warrants	(84,595)	138,622	(37,677)
Gain on Forgiveness of PPP Loan	(8,604)	0	0
Loss on Deconsolidation of VIEs	0	1,494	0
Impairment Expense	0	0	445
Interest Expense on Term Loan	1,527	0	0
Other Income, Net	(1,335)	(463)	(639)
Total Expenses	129,004	282,896	84,669
Net Income (Loss) Before Income Taxes	70,877	(138,270)	18,567
Income Tax Expense	(295)	(71)	(16)
Net Income (Loss)	70,582	(138,341)	18,551
Plus: Return on Share Purchase	0	0	2,381
Less: Net Income Allocated to Participating Securities	(47,350)	0	(15,172)
Net Income (Loss) Attributable to Common Stockholders	$ 23,232	$ (138,341)	$ 5,760
Net Income (Loss) Per Share – Basic (in dollars per share)	$ 0.32	$ (1.95)	$ 0.08
Net Income (Loss) Per Share – Diluted (in dollars per share)	$ 0.07	$ (1.95)	$ 0.02
Weighted-Average Shares – Basic (in shares)	73,291,714	70,767,275	68,592,557
Weighted-Average Shares – Diluted (in shares)	348,593,594	70,767,275	306,673,586
Transaction Fees, Net
Operating Revenues:
Revenues	$ 162,742	$ 89,364	$ 67,335
Servicing Fees, Net
Operating Revenues:
Revenues	15,113	15,024	18,517
Other Revenues
Operating Revenues:
Revenues	$ 6,452	$ 3,992	$ 2,711

Consolidated Statements of Op_2

Consolidated Statements of Operations - Prosper Funding LLC - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating Revenues:
Gain on Sale of Borrower Loans	$ (1,039)	$ 7,196	$ 4,816
Total Operating Revenues	183,268	115,576	93,379
Interest Income (Expense):
Interest Income on Borrower Loans	86,350	83,107	104,150
Interest Expense on Notes	(60,025)	(50,816)	(60,127)
Total Interest Income, Net	26,325	32,291	44,023
Change in Fair Value of Financial Instruments, Net	(9,712)	(3,241)	(34,166)
Total Net Revenue	199,881	144,626	103,236
Expenses:
General and Administrative	83,658	73,122	63,384
Total Expenses	129,004	282,896	84,669
Net Income (Loss)	70,582	(138,341)	18,551
Prosper Funding LLC
Operating Revenues:
Gain on Sale of Borrower Loans	1,678	8,450	6,430
Total Operating Revenues	83,469	59,549	49,391
Interest Income (Expense):
Interest Income on Borrower Loans	45,289	36,952	36,765
Interest Expense on Notes	(42,165)	(34,514)	(34,457)
Total Interest Income, Net	3,124	2,438	2,308
Change in Fair Value of Financial Instruments, Net	394	770	454
Total Net Revenue	86,987	62,757	52,153
Expenses:
Administration Fee – Related Party	74,382	52,641	45,472
Servicing	8,472	6,409	4,900
General and Administrative	610	497	380
Total Expenses	83,464	59,547	50,752
Net Income (Loss)	3,523	3,210	1,401
Administration Fee Revenue – Related Party | Prosper Funding LLC
Operating Revenues:
Revenues	60,256	34,017	21,618
Servicing Fees, Net
Operating Revenues:
Revenues	15,113	15,024	18,517
Servicing Fees, Net | Prosper Funding LLC
Operating Revenues:
Revenues	20,641	15,770	20,791
Other Revenues
Operating Revenues:
Revenues	6,452	3,992	2,711
Other Revenues | Prosper Funding LLC
Operating Revenues:
Revenues	$ 894	$ 1,312	$ 552

Consolidated Statements of Othe

Consolidated Statements of Other Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Net Income (Loss)	$ 70,582	$ (138,341)	$ 18,551
Other Comprehensive Income (Loss), Net of Tax	0	0	0
Comprehensive Income (Loss), Net of Tax	$ 70,582	$ (138,341)	$ 18,551

Consolidated Statements of Conv

Consolidated Statements of Convertible Preferred Stock and Stockholders’ Deficit - USD ($) $ in Thousands	Total	Convertible Preferred Stock	Convertible Preferred Stock Held by Consolidated VIE	Common Stock	Treasury Stock	Additional Paid-In Capital	Accumulated Deficit
Beginning balance (in shares) at Dec. 31, 2019		209,613,570	0
Beginning balance at Dec. 31, 2019		$ 322,748	$ 0
Increase (Decrease) in Temporary Equity [Roll Forward]
Purchase of Convertible Preferred Stock by consolidated VIE Prosper Grantor Trust (Note 12) (in shares)			(51,247,915)
Purchase of Convertible Preferred Stock by consolidated VIE Prosper Grantor Trust (Note 12)			$ (2,381)
Ending balance (in shares) at Dec. 31, 2020		209,613,570	(51,247,915)
Ending balance at Dec. 31, 2020		$ 322,748	$ (2,381)
Beginning balance (in shares) at Dec. 31, 2019				73,629,136
Beginning balance at Dec. 31, 2019	$ (306,255)			$ 208	$ (23,417)	$ 151,416	$ (434,462)
Beginning balance (in shares) at Dec. 31, 2019					(5,177,235)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of vested stock options (in shares)				687,471
Exercise of vested stock options	15			$ 7		8
Stock-based compensation expense	2,147					2,147
Purchase of Convertible Preferred Stock by consolidated VIE Prosper Grantor Trust (Note 12)	2,381					2,381
Net Income (Loss)	18,551						18,551
Ending balance (in shares) at Dec. 31, 2020				74,316,607
Ending balance at Dec. 31, 2020	$ (283,161)			$ 215	$ (23,417)	155,952	(415,911)
Ending balance (in shares) at Dec. 31, 2020					(5,177,235)
Ending balance (in shares) at Dec. 31, 2021	209,613,570	209,613,570	(51,247,915)
Ending balance at Dec. 31, 2021		$ 322,748	$ (2,381)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of vested stock options (in shares)				3,014,622
Exercise of vested stock options	$ 61			$ 30		31
Stock-based compensation expense	1,273					1,273
Net Income (Loss)	$ (138,341)						(138,341)
Ending balance (in shares) at Dec. 31, 2021	72,153,994			77,331,229
Ending balance at Dec. 31, 2021	$ (420,168)			$ 245	$ (23,417)	157,256	(554,252)
Ending balance (in shares) at Dec. 31, 2021					(5,177,235)
Ending balance (in shares) at Dec. 31, 2022	209,613,570	209,613,570	(51,247,915)
Ending balance at Dec. 31, 2022		$ 322,748	$ (2,381)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of vested stock options (in shares)				2,133,921
Exercise of vested stock options	$ 54			$ 22		32
Stock-based compensation expense	1,526					1,526
Net Income (Loss)	$ 70,582						70,582
Ending balance (in shares) at Dec. 31, 2022	74,287,915			79,465,150
Ending balance at Dec. 31, 2022	$ (348,006)			$ 267	$ (23,417)	$ 158,814	$ (483,670)
Ending balance (in shares) at Dec. 31, 2022					(5,177,235)

Consolidated Statements of Memb

Consolidated Statements of Member’s Equity - Prosper Funding LLC - USD ($) $ in Thousands	Total	Retained Earnings	Prosper Funding LLC	Prosper Funding LLC Retained Earnings	Prosper Funding LLC Member’s Equity
Beginning balance at Dec. 31, 2019	$ (306,255)	$ (434,462)	$ 28,187	$ 12,283	$ 15,904
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Distributions to Parent			(4,500)		(4,500)
Net Income (Loss)	18,551	18,551	1,401	1,401
Ending balance at Dec. 31, 2020	(283,161)	(415,911)	25,088	13,684	11,404
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Distributions to Parent			0		0
Net Income (Loss)	(138,341)	(138,341)	3,210	3,210
Ending balance at Dec. 31, 2021	(420,168)	(554,252)	28,298	16,894	11,404
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Distributions to Parent			(5,700)		(5,700)
Contribution from Parent			650		650
Net Income (Loss)	70,582	70,582	3,523	3,523
Ending balance at Dec. 31, 2022	$ (348,006)	$ (483,670)	$ 26,771	$ 20,417	$ 6,354

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2022		Dec. 31, 2021		Dec. 31, 2020
Cash Flows from Operating Activities:
Net Income (Loss)	$ 70,582,000		$ (138,341,000)		$ 18,551,000
Adjustments to Reconcile Net Income (Loss) to Net Cash (Used in) Provided by Operating Activities:
Change in Fair Value of Financial Instruments	9,712,000		3,241,000		34,160,000
Depreciation and Amortization	10,924,000		9,839,000		8,349,000
Amortization of Operating Lease Right-of-Use Asset	3,545,000		3,774,000		3,487,000
Gain on Termination of Operating Lease Right-of-Use Asset	(88,000)		0		0
Impairment of Operating Lease Right-of-Use Asset	0		0		445,000
Gain on Sale of Borrower Loans	(12,957,000)		(7,973,000)		(5,830,000)
Change in Fair Value of Servicing Rights	9,157,000		8,454,000		9,189,000
Stock-Based Compensation Expense	1,326,000		1,136,000		1,913,000
Loss on Deconsolidation of VIEs	0		1,494,000		0
Change in Fair Value of Convertible Preferred Stock Warrants	(84,595,000)		138,622,000		(37,677,000)
Gain on Forgiveness of PPP Loan	(8,604,000)		0		0
Other, Net	12,000		2,027,000		1,675,000
Changes in Operating Assets and Liabilities:
Purchase of Loans Held for Sale at Fair Value	(3,063,729,000)		(1,712,705,000)		(1,338,082,000)
Proceeds from Sales and Principal Payments of Loans Held for Sale at Fair Value	2,783,971,000		1,770,822,000		1,254,474,000
Accounts Receivable	(2,408,000)		(449,000)		1,090,000
Prepaid and Other Assets	(2,194,000)		639,000		498,000
Credit Card Derivative	3,304,000		0		0
Accounts Payable and Accrued Liabilities	11,530,000		7,776,000		(2,187,000)
Payable to Investors	(67,482,000)		28,700,000		23,002,000
Other Liabilities	3,092,000		(3,493,000)		(5,391,000)
Net Cash (Used in) Provided by Operating Activities	(334,902,000)		113,563,000		(32,334,000)
Cash Flows from Investing Activities:
Purchase of Borrower Loans Held at Fair Value	(284,921,000)		(231,998,000)		(133,644,000)
Proceeds from Sales and Principal Payments of Borrower Loans Held at Fair Value	202,119,000		236,861,000		279,658,000
Purchases of Property and Equipment	(13,063,000)		(12,041,000)		(8,359,000)
Net Cash (Used in) Provided by Investing Activities	(95,865,000)		(7,178,000)		137,655,000
Cash Flows from Financing Activities:
Proceeds from Issuance of Notes Held at Fair Value	285,115,000		231,933,000		133,228,000
Payments of Notes Held at Fair Value	(202,308,000)		(172,250,000)		(149,409,000)
Principal Payments on Notes Issued by Securitization Trust	0		(87,700,000)		(192,771,000)
Principal Payments on Certificates Issued by Securitization Trust	0		(14,935,000)		(22,136,000)
Net cash and restricted cash outflows from Deconsolidation of VIEs	0		(6,821,000)		0
Proceeds from Warehouse Lines	235,870,000		68,800,000		126,149,000
Principal payments on Warehouse Lines	0		(101,900,000)		(15,300,000)
Proceeds from Term Loan (Note 10)	73,500,000		0		0
Principal payments on financing lease	(78,000)		(76,000)		(84,000)
Proceeds from PPP Loan	0		0		8,447,000
Payment for Debt Issuance Costs	(402,000)		(1,740,000)		0
Proceeds from Exercise of Stock Options	54,000		61,000		15,000
Net Cash Provided by (Used in) Financing Activities	391,751,000		(84,628,000)		(111,861,000)
Net (Decrease) Increase in Cash, Cash Equivalents and Restricted Cash	(39,016,000)		21,757,000		(6,540,000)
Cash, Cash Equivalents and Restricted Cash at Beginning of the Period	235,625,000		213,868,000		220,408,000
Cash, Cash Equivalents and Restricted Cash at End of the Period	196,609,000		235,625,000		213,868,000
Supplemental Disclosure of Cash Flow Information:
Cash Paid for Interest	58,114,000		49,923,000		57,697,000
Cash paid for operating leases included in the measurement of lease liabilities	5,770,000		5,381,000		5,524,000
Non-Cash Investing Activity - Accrual for Property and Equipment, Net	1,154,000		971,000		833,000
Non-Cash Financing Activity - Forgiveness of PPP Loan	8,604,000		0		0
Non-Cash Investing Activity - Deconsolidation of Borrower Loans, at Fair Value	0		78,361,000		0
Non-Cash Financing Activity - Deconsolidation of Notes Issued by Securitization Trust	0		69,709,000		0
Non-Cash Financing Activity - Deconsolidation of Certificates Issued by Securitization Trust, at Fair Value	0		13,979,000		0
Right-of-use assets obtained in exchange for new financing lease obligation	0		0		239,000
Reconciliation to Amounts on Consolidated Balance Sheets
Cash and Cash Equivalents	83,446,000		67,700,000		50,145,000
Restricted Cash	113,163,000	[1]	167,925,000	[1]	163,723,000
Total Cash, Cash Equivalents and Restricted Cash	$ 196,609,000		$ 235,625,000		$ 213,868,000
[1](1) Includes amounts in consolidated variable interest entities (VIEs) presented separately in the table below.

Consolidated Statements of Ca_2

Consolidated Statements of Cash Flows - Prosper Funding LLC - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022		Dec. 31, 2021		Dec. 31, 2020
Cash Flows from Operating Activities:
Net Income (Loss)	$ 70,582		$ (138,341)		$ 18,551
Adjustments to Reconcile Net Income to Net Cash Provided by (Used in) Operating Activities:
Change in Fair Value of Financial Instruments, Net	9,712		3,241		34,160
Gain on Sale of Borrower Loans	(12,957)		(7,973)		(5,830)
Depreciation and Amortization	10,924		9,839		8,349
Changes in Operating Assets and Liabilities:
Purchase of Loans Held for Sale, at Fair Value	(3,063,729)		(1,712,705)		(1,338,082)
Proceeds from Sales and Principal Payments of Loans Held for Sale, at Fair Value	2,783,971		1,770,822		1,254,474
Accounts Payable and Accrued Liabilities	11,530		7,776		(2,187)
Payable to Investors	(67,482)		28,700		23,002
Other Liabilities	3,092		(3,493)		(5,391)
Net Cash (Used in) Provided by Operating Activities	(334,902)		113,563		(32,334)
Cash Flows From Investing Activities:
Purchase of Borrower Loans, at Fair Value	(284,921)		(231,998)		(133,644)
Proceeds from Sales and Principal Payments of Borrower Loans, at Fair Value	202,119		236,861		279,658
Purchases of Property and Equipment	(13,063)		(12,041)		(8,359)
Net Cash (Used in) Provided by Investing Activities	(95,865)		(7,178)		137,655
Cash Flows from Financing Activities:
Proceeds from Issuance of Notes, at Fair Value	285,115		231,933		133,228
Payments of Notes, at Fair Value	(202,308)		(172,250)		(149,409)
Net Cash Provided by (Used in) Financing Activities	391,751		(84,628)		(111,861)
Net (Decrease) Increase in Cash, Cash Equivalents and Restricted Cash	(39,016)		21,757		(6,540)
Cash, Cash Equivalents and Restricted Cash at Beginning of the Period	235,625		213,868		220,408
Cash, Cash Equivalents and Restricted Cash at End of the Period	196,609		235,625		213,868
Supplemental Disclosure of Cash Flow Information:
Cash Paid for Interest	58,114		49,923		57,697
Non-Cash Investing Activity- Accrual for Property and Equipment, Net	1,154		971		833
Reconciliation to Amounts on Consolidated Balance Sheets:
Cash and Cash Equivalents	83,446		67,700		50,145
Restricted Cash	113,163	[1]	167,925	[1]	163,723
Total Cash, Cash Equivalents and Restricted Cash	196,609		235,625		213,868
Prosper Funding LLC
Cash Flows from Operating Activities:
Net Income (Loss)	3,523		3,210		1,401
Adjustments to Reconcile Net Income to Net Cash Provided by (Used in) Operating Activities:
Change in Fair Value of Financial Instruments, Net	(394)		(770)		(454)
Other Non-Cash Changes in Borrower Loans, Loans Held for Sale and Notes	92		26		46
Gain on Sale of Borrower Loans	(15,278)		(9,020)		(7,203)
Change in Fair Value of Servicing Rights	10,214		10,312		11,003
Depreciation and Amortization	5,525		4,878		4,149
Changes in Operating Assets and Liabilities:
Purchase of Loans Held for Sale, at Fair Value	(3,063,729)		(1,712,705)		(1,338,082)
Proceeds from Sales and Principal Payments of Loans Held for Sale, at Fair Value	3,063,729		1,712,705		1,338,082
Other Assets	233		(100)		532
Accounts Payable and Accrued Liabilities	2,758		(543)		228
Payable to Investors	(66,754)		27,415		20,979
Net Related Party Receivable/Payable	1,468		(2,544)		1,183
Other Liabilities	1,174		(179)		(1,114)
Net Cash (Used in) Provided by Operating Activities	(57,439)		32,685		30,750
Cash Flows From Investing Activities:
Purchase of Borrower Loans, at Fair Value	(284,921)		(231,998)		(133,644)
Proceeds from Sales and Principal Payments of Borrower Loans, at Fair Value	202,119		172,709		149,908
Purchases of Property and Equipment	(7,543)		(6,127)		(3,270)
Net Cash (Used in) Provided by Investing Activities	(90,345)		(65,416)		12,994
Cash Flows from Financing Activities:
Proceeds from Issuance of Notes, at Fair Value	285,115		231,933		133,228
Payments of Notes, at Fair Value	(202,308)		(172,250)		(149,409)
Cash Contribution from Parent	650		0		0
Cash Distributions to Parent	(5,700)		0		(4,500)
Net Cash Provided by (Used in) Financing Activities	77,757		59,683		(20,681)
Net (Decrease) Increase in Cash, Cash Equivalents and Restricted Cash	(70,027)		26,952		23,063
Cash, Cash Equivalents and Restricted Cash at Beginning of the Period	167,876		140,924		117,861
Cash, Cash Equivalents and Restricted Cash at End of the Period	97,849		167,876		140,924
Supplemental Disclosure of Cash Flow Information:
Cash Paid for Interest	41,431		34,682		34,410
Non-Cash Investing Activity- Accrual for Property and Equipment, Net	313		234		504
Reconciliation to Amounts on Consolidated Balance Sheets:
Cash and Cash Equivalents	6,285		10,765		8,592
Restricted Cash	91,564		157,111		132,332
Total Cash, Cash Equivalents and Restricted Cash	$ 97,849		$ 167,876		$ 140,924
[1](1) Includes amounts in consolidated variable interest entities (VIEs) presented separately in the table below.

ORGANIZATION AND BUSINESS

ORGANIZATION AND BUSINESS	12 Months Ended
	Dec. 31, 2022
Entity Information [Line Items]
ORGANIZATION AND BUSINESS	ORGANIZATION AND BUSINESS Prosper Marketplace, Inc. (“PMI” or the “Company”) was incorporated in the state of Delaware on March 22, 2005. Except as the context requires otherwise, as used in these notes to consolidated financial statements of PMI, “Prosper,” “we,” “us,” and “our” refer to PMI and its wholly-owned subsidiaries, on a consolidated basis. PMI developed a peer-to-peer online credit marketplace (the “marketplace”), and in February 2013, transferred ownership of the marketplace to Prosper Funding LLC (“PFL”), its wholly-owned subsidiary. All of the borrower payment dependent notes (“Notes”) issued and sold through the marketplace today are issued and sold by PFL. PFL also operates the marketplace and facilitates the origination of unsecured, personal loans by WebBank (“Borrower Loans”), an FDIC-insured, Utah-chartered industrial bank, through the marketplace. Pursuant to a Loan Account Program Agreement between PMI and WebBank, PMI manages the operation of the marketplace as an agent of WebBank in connection with the submission of loan applications by potential borrowers. PMI also manages the origination of related loans by WebBank and the funding of such Borrower Loans by WebBank. On February 1, 2013, PFL entered into an Administration Agreement with PMI in its capacity as licensee, corporate administrator, loan marketplace administrator and loan and Note servicer, pursuant to which PMI provides certain back office support, loan platform administration and loan servicing to PFL. A borrower who wishes to obtain a Borrower Loan through the marketplace must post a loan listing on the marketplace. Listings are allocated to one of two investor funding channels: (i) the “Note Channel,” which allows investors to commit to purchase Notes from PFL, the payments of which are dependent on PFL’s receipt of payments made on the corresponding Borrower Loan; and (ii) the “Whole Loan Channel,” which allows investors to commit to purchase 100% of a Borrower Loan directly from Prosper. As of December 31, 2022, the marketplace is open to inve stors in 30 states and the District of Columbia. Additionally, as of December 31, 2022, the marketplace is open to borrowers in 48 state s and the District of Columbia. Currently our marketplace does not operate internationally. In December 2021, the Company launched its Prosper Credit Card product in partnership with Coastal Community Bank (“Coastal”), through which eligible consumers are extended unsecured credit through Prosper-branded Credit Cards. In accordance with our program agreement with Coastal, the receivables associated with these Credit Cards are maintained on the balance sheet of Coastal. Customer accounts are then randomly designated as either Prosper Allocations or Coastal Allocations on an approximate 90% to 10% split, respectively. Each party receives 100% of the interest income and is responsible for the credit losses on its allocated customer accounts. PMI is responsible for verified fraud losses across the entire portfolio and a portion of straight charge-off losses. Credit Card receivables are not available on the Company’s personal loan marketplace for investment purposes.
Prosper Funding LLC
Entity Information [Line Items]
ORGANIZATION AND BUSINESS	ORGANIZATION AND BUSINESS Prosper Funding LLC ( “PFL”) was formed in the state of Delaware in February 2012 as a limited liability company with Prosper Marketplace, Inc. (“PMI”) as its sole equity member. Except as the context otherwise requires, as used in these Notes to consolidated financial statements of Prosper Funding LLC, PFL and the “Company” refer to Prosper Funding LLC and its wholly owned subsidiary, Prosper Depositor LLC, a Delaware limited liability company, on a consolidated basis. PFL did not have any items of other comprehensive income (loss) during any of the periods presented in the consolidated financial statements as of and for the years ended December 31, 2022, 2021 and 2020. PFL was formed by PMI to hold Borrower Loans and issue Notes through the marketplace. Although PFL is consolidated with PMI for accounting and tax purposes, PFL has been organized and is operated in a manner that is intended to minimize the likelihood that it would be substantively consolidated with PMI in a bankruptcy proceeding. PFL’s intention is to minimize the likelihood that its assets would be subject to claims by PMI’s creditors if PMI were to file for bankruptcy, as well as to minimize the likelihood that PFL will become subject to bankruptcy proceedings directly. PFL seeks to achieve this by placing certain restrictions on its activities and implementing certain formal procedures designed to expressly reinforce its status as a distinct entity from PMI. Since February 1, 2013, all Notes issued and sold through the marketplace are issued, sold and serviced by PFL. Pursuant to a Loan Account Program Agreement between PMI and WebBank, PMI manages the operation of the marketplace, as agent of WebBank, in connection with the submission of Borrower Loan applications by potential borrowers, the origination of related Borrower Loans by WebBank and the funding of such Borrower Loans by WebBank. Pursuant to an Administration Agreement between PFL and PMI, PMI manages all other aspects of the marketplace on behalf of PFL. As a result PFL earns significant revenues and incurs significant expenses with a related party, its direct parent company, PMI. A borrower who wishes to obtain a loan through the marketplace must post a loan listing on the marketplace. PFL allocates listings to one of two investor funding channels: (i) the “Note Channel,” which allows investors to commit to purchase Notes from PFL, the payments of which are dependent on PFL’s receipt of payments made on the corresponding Borrower Loan; and (ii) the “Whole Loan Channel,” which allows investors to commit to purchase 100% of a Borrower Loan directly from PFL. All loans requested and obtained through the marketplace are unsecured obligations of individual borrowers with a fixed interest rate and original terms to maturity of 24, 36, 48 or 60 months as of December 31, 2022. All loans made through the marketplace are funded by WebBank, an FDIC-insured, Utah chartered industrial bank. After funding a loan, WebBank sells the loan to PFL, without recourse to WebBank, in exchange for the principal amount of the loan. WebBank does not have any obligation to purchasers of the Notes. As of December 31, 2022, PFL’s marketplace was open to investo rs in 30 states and the District of Columbia. Additionally, as of December 31, 2022, PFL’s marketplace was open to borrowers in 48 states and the District of Columbia. Currently, the marketplace does not operate internationally.

SUMMARY OF SIGNIFICANT ACCOUNT

SUMMARY OF SIGNIFICANT ACCOUNT POLICIES	12 Months Ended
	Dec. 31, 2022
Entity Information [Line Items]
SUMMARY OF SIGNIFICANT ACCOUNT POLICIES	SUMMARY OF SIGNIFICANT ACCOUNT POLICIES Basis of Presentation The accompanying consolidated financial statements include the accounts of PMI and its wholly owned subsidiaries including PFL, Prosper Healthcare Lending LLC (“PHL”), BillGuard, Inc. (“BillGuard”), and its consolidated VIEs including Prosper Warehouse I Trust (“PWIT”), Prosper Warehouse II Trust (“PWIIT”) and Prosper Grantor Trust (“PGT”). All intercompany balances and transactions between PMI and its subsidiaries have been eliminated in consolidation. PMI and PFL’s financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (“U.S. GAAP”). Use of Estimates The preparation of the consolidated financial statements in conformity with U.S. GAAP requires management to make certain estimates, judgments and assumptions that affect the reported amounts of assets and liabilities and the related disclosures, including contingent liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting periods. These estimates, judgments and assumptions include but are not limited to the following: valuation of Loans Held for Sale, Borrower Loans and associated Notes, valuation of servicing rights, loan trailing fee liability and Credit Card Derivative, valuation allowance on deferred tax assets, stock-based compensation expense, Intangible Assets, Goodwill, Convertible Preferred Stock Warrant Liability, Repurchase Obligations and contingent liabilities. These judgments, estimates and assumptions are inherently subjective in nature and actual results may differ from these estimates and assumptions. Consolidation of Variable Interest Entities A variable interest entity (VIE) is a legal entity that has either a total equity investment that is insufficient to finance its activities without additional subordinated financial support or whose equity investors lack the characteristics of a controlling financial interest. Prosper’s variable interest arises from contractual, ownership or other monetary interests in the entity, which change with fluctuations in the fair value of the entity’s net assets. A VIE is consolidated by its primary beneficiary, which is the party that has both the power to direct the activities that most significantly impact the VIE’s economic performance, and the obligation to absorb losses or the right to receive benefits of the VIE that could potentially be significant to the VIE. Prosper consolidates a VIE when it is deemed to be the primary beneficiary. Prosper assesses whether or not it is the primary beneficiary of a VIE on an ongoing basis. Transfers of Financial Assets Prosper accounts for transfers of financial assets as sales when it has surrendered control over the transferred assets. Control is generally considered to have been surrendered when the transferred assets have been legally isolated from Prosper, the transferee has the right to pledge or exchange the assets without any significant constraints, and Prosper has not entered into a repurchase agreement, does not hold unconditional call options and has not written put options on the transferred assets. In assessing whether control has been surrendered, Prosper considers whether the transferee would be a consolidated affiliate and the impact of all arrangements or agreements made contemporaneously with, or in contemplation of the transfer, even if they were not entered into at the time of transfer. Prosper measures gain or loss on sale of financial assets as the net proceeds received on the sale less the carrying amount of the loans sold. The net proceeds of the sale include the fair value of any assets obtained or liabilities incurred as part of the transaction, including, but not limited to Servicing Assets, retained securities, and recourse obligations. Fair Value Measurement Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Financial instruments measured at fair value consist principally of Borrower Loans, Loans Held for Sale (Note 4), Servicing Assets (Note 6), Credit Card Derivative (Note 5), Loan Trailing Fee Liabilities (Note 9), Debt (Note 10) and Convertible Preferred Stock Warrant Liability (Note 12). The estimated fair values of other financial instruments, including Cash and Cash Equivalents, Restricted Cash, Accounts Receivable, Accounts Payable and Accrued Liabilities, and Payable to Investors approximate their carrying values because of their short-term nature. The estimated fair values of the Term Loan and Warehouse Lines (Note 10) do not approximate their carrying values due primarily to differences in the stated and market rates associated with these instruments. The fair value hierarchy includes a three-level classification, which is based on whether the inputs to the valuation methodology used for measurement are observable: Level 1 — Quoted market prices in active markets for identical assets or liabilities. Level 2 — Inputs other than quoted prices included in Level 1 that are observable for the asset or liability either directly or indirectly. Level 3 — Unobservable inputs. When developing fair value measurements, Prosper maximizes the use of observable inputs and minimizes the use of unobservable inputs. However, for certain instruments Prosper must utilize unobservable inputs in determining fair value due to the lack of observable inputs in the market, which requires greater judgment in measuring fair value. In instances where there is limited or no observable market data, fair value measurements for assets and liabilities are determined using assumptions that management believes a market participant would use in pricing the asset or liability. As observable market prices are not available for the Borrower Loans, Loans Held for Sale, Notes, Servicing Assets and Credit Card Derivative, or for similar assets and liabilities, Prosper believes the Borrower Loans, Loans Held for Sale, Notes, Servicing Assets and Credit Card Derivative are considered level 3 financial instruments. Prosper primarily uses a discounted cash flow model to estimate their fair value, and key assumptions used in valuation include default rates and prepayment rates derived from market data and historical performance and discount rates based on estimates of the rates of return that investors would require when investing in financial instruments with similar characteristics. The obligation to pay principal and interest on any series of Notes is equal to the loan payments, if any, that are received on the corresponding Borrower Loan, net of our servicing fee which is 1.0% of the outstanding balance. The fair value election for Notes and Borrower Loans allows both the assets and the related liabilities to receive similar accounting treatment for expected losses which is consistent with the subsequent cash flows to investors that are dependent upon borrower payments. As such, the fair value of a series of Notes is approximately equal to the fair value of the corresponding Borrower Loan, adjusted for the 1.0% servicing fee and the timing of loan purchase, Note issuance and borrower payments. As a result, the valuation of the Notes uses the same methodology and assumptions as the Borrower Loans, except that the Notes incorporate the 1.0% servicing fee and any differences in timing in payments. The effective interest rate associated with a group of Notes is less than the interest rate earned on the corresponding Borrower Loan due to the 1.0% servicing fee. Refer to Note 7 for additional fair value disclosures. Cash and Cash Equivalents Cash includes various unrestricted deposits with investment-grade rated financial institutions. Cash equivalents consist of highly liquid marketable securities with original maturities of three months or less at the time of purchase and consist primarily of money market funds, commercial paper, US treasury securities and US agency securities. Cash equivalents are recorded at cost, which approximates fair value. At times, our cash balances may exceed federally insured amounts and potentially subject the Company to a concentration of credit risk. The Company believes that no significant concentration of credit risk exists with respect to these balances based on its assessment of the creditworthiness of these financial institutions. Restricted Cash Restricted cash consists primarily of cash deposits, money market funds and short term certificate of deposit accounts held as collateral as required for loan funding and servicing activities, and cash that investors or Prosper have on the marketplace that has not yet been invested in Borrower Loans or disbursed to the investor. Borrower Loans, Loans Held for Sale and Notes Borrower Loans are funded either through the Note Channel or through the Whole Loan Channel. Through the Note Channel, Prosper purchases Borrower Loans from WebBank, then issues Notes and holds the Borrower Loans until maturity. The obligation to repay a series of Notes issued through the Note Channel is dependent upon the repayment of the associated Borrower Loan. Borrower Loans funded and Notes issued through the Note Channel are carried on Prosper’s consolidated balance sheets as assets and liabilities, respectively. Prosper uses Warehouse Lines to purchase Loans Held for Sale that may be subsequently contributed to securitization transactions or sold to investors. Loans Held for Sale are included in “Loans Held for Sale, at Fair Value” in the Consolidated Balance Sheets. See Note 10 - Debt for more details on Warehouse Lines. Borrower Loans and Loans Held for Sale are purchased from WebBank. Prosper places Borrower Loans and Loans Held for Sale on non-accrual status when they are 120 days past due. When a loan is placed on non-accrual status, Prosper stops accruing interest and reverses all accrued but unpaid interest as of such date. Additionally, Prosper charges-off Borrower Loans and Loans Held for Sale when they are 120 days past due. The fair value of loans 120 or more days past due generally consists of the expected recovery from debt sales in subsequent periods. Prosper has elected the fair value option for Borrower Loans, Loans Held for Sale and Notes. Changes in fair value of Borrower Loans funded through the Note Channel are largely offset by the changes in fair value of Notes due to the borrower payment-dependent design of the Notes. Changes in fair value of Loans Held for Sale are recorded through Proper's earnings and Prosper collects interest on Loans Held for Sale. Changes in the fair values of Borrower Loans, Loans Held for Sale and Notes are included in Change in Fair Value of Financial Instruments on the accompanying Consolidated Statements of Operations. Prosper primarily uses a discounted cash flow model to estimate the fair value of Borrower Loans, Loans Held for Sale and Notes. The key assumptions used in the valuation include default rates and prepayment rates derived primarily from historical performance, and discount rates based on estimates of the rates of return that investors would require when investing in financial instruments with similar characteristics. Credit Card Derivative The Company evaluated the terms of the Credit Card program agreement with Coastal and determined that it contained features that met the definition of derivatives under Accounting Standards Codification (“ASC”) 815, Derivatives and Hedging . These features are freestanding financial instruments (as defined under ASC 480, Distinguishing Liabilities from Equity ), and have been valued separately as derivatives. A right of offset exists between the derivatives, and they are presented net on the accompanying consolidated balance sheets. Changes in the fair value of the Credit Card Derivative are recorded in Change in Fair Value of Financial Instruments on the accompanying Consolidated Statements of Operations. Refer to Note 5, Credit Card, for additional details on revenues and expenses related to the Credit Card product. Servicing Assets Prosper records Servicing Assets at their estimated fair values for servicing rights retained when Prosper sells Borrower Loans to unrelated third-party buyers. The change in fair value of Servicing Assets is recognized in Servicing Fees, Net. The gain or loss on a loan sale is recorded in (Loss) Gain on Sale of Borrower Loans while the fair value of the servicing rights, which is based on the degree to which the contractual loan servicing fee is above or below an estimated market servicing rate is recorded in Servicing Assets on the Consolidated Balance Sheets. Prosper uses a discounted cash flow model to estimate the fair value of the loan Servicing Assets which considers the contractual servicing fee revenue that Prosper earns on the Borrower Loans, the estimated market servicing rates to service such loans, the prepayment rates, the default rates and the current principal balances of the Borrower Loans. Property and Equipment Property and Equipment consists of computer equipment, office furniture and equipment, leasehold improvements, software purchased or developed for internal use and web site development costs. Property and Equipment is stated at cost, less accumulated depreciation and amortization, and is computed using the straight-line method based upon estimated useful lives of the assets. Estimated useful lives of the assets are as follows: Furniture and fixtures 7 years Office equipment 5 years Computers and equipment 3 years Leasehold improvements 5 - 8 years Software and website development costs 1 - 5 years The costs to develop software for the website and other internal uses are capitalized when management has authorized and committed project funding, when preliminary development efforts are successfully completed, and when it is probable that the project will be completed and the software will be used as intended. Capitalized software and website development costs primarily include software licenses acquired, fees paid to outside consultants and salaries and payroll-related costs for employees directly involved in the development efforts. Costs incurred prior to meeting these criteria, together with costs incurred for training and maintenance, are expensed. Costs incurred for upgrades and enhancements that are considered to be probable to result in additional functionality are capitalized. Capitalized costs are included in Property and Equipment and amortized to expense using the straight-line method over their expected lives. Software and website development assets are evaluated for impairment whenever events or changes in circumstances indicate that the carrying amount of such assets may not be recoverable. Recoverability of software and website development assets to be held and used is measured by a comparison of the carrying amount of the asset group to the future net undiscounted cash flows expected to be generated by the asset group. If such software and website development assets are considered to be impaired, the impairment to be recognized is the excess of the carrying amount over the fair value of the software and website development asset group. Leases Management determines if an arrangement is a lease at inception. Operating lease right-of-use (“ROU”) assets and operating lease liabilities are included on the Consolidated Balance Sheets in Property and Equipment, Net and in Other Liabilities, respectively. For certain leases with original terms of twelve months or less, PMI recognizes the lease expense as incurred and does not record ROU assets and lease liabilities. If a contract contains a lease, management evaluates whether it should be classified as an operating or finance lease. Operating lease ROU assets and operating lease liabilities are recognized based on the present value of the future minimum lease payments over the lease term at the commencement date. As most of PMI's leases do not provide an implicit rate, management uses an incremental borrowing rate based on the information available at commencement date in determining the present value of future payments. The operating lease ROU asset also includes any lease payments made and excludes lease incentives and initial direct costs incurred. Lease expense for minimum lease payments is recognized on a straight-line basis over the lease term. The operating lease ROU assets are evaluated for impairment utilizing the same impairment model used for Property and Equipment. Goodwill and Intangibles Goodwill associated with business combinations is computed by recognizing the portion of the purchase price that is not tied to individually identifiable and separately recognizable assets. Goodwill is assigned to the Company’s reporting units at the acquisition date according to the expected economic benefits that the acquired business will provide to the reporting unit. A reporting unit is a business operating segment or a component of a business operating segment. The Company identifies its reporting units based on how the operating segments and reporting units are managed. Accordingly, the Company allocated the entire balance of goodwill to the Personal Loan reportable and operating segment. Refer to Note 20 for further information on the Company’s reportable and operating segments. Goodwill is not amortized but is tested for impairment annually or whenever indications of impairment exist. Annual impairment testing occurs on October 1. Impairment exists whenever the carrying value of Goodwill exceeds its implied fair value. Adverse changes in impairment indicators such as loss of key personnel, increased regulatory oversight or unplanned changes in operations could result in impairment. PMI did not recognize any Goodwill impairment during the years ended December 31, 2022, 2021 and 2020. Costs of internally developing any intangibles is expensed as incurred. Intangible Assets identified through the acquisitions of American Healthcare Lending and BillGuard include customer relationships, technology and a brand name. The user base and customer relationship Intangible Assets are being amortized on an accelerated basis over a three three Payable to Investors Payable to Investors primarily represents the obligation to investors related to cash held in an account for the benefit of investors and payments-in-process received from borrowers. Term Loan Prosper entered into a Credit Agreement, which provided for a Term Loan with a third-party financial institution in November 2022, which is more fully described in Note 10. This Term Loan is carried at amortized cost, net of discounts and issuance costs, which are subsequently amortized to Interest Expense on Term Loan over the life of the underlying agreement. Warehouse Lines Warehouse Lines are carried at amortized cost. Prosper defers specific incremental costs directly related to entering into the Warehouse Lines and subsequently amortizes them into interest expense over the life of the arrangements. Convertible Preferred Stock Warrant Liability Prosper has entered into varying arrangements with investors to issue preferred stock warrants in exchange for their participation as a purchaser of Borrower Loans. In all cases, these warrants are free standing financial instruments due to their status as legally detached and separately exercisable warrants without conditions requiring Prosper to repurchase those warrants or the underlying preferred shares. These freestanding warrants are accounted for in accordance with ASC 480, Distinguishing Liabilities from Equity . Under ASC 480, vested freestanding warrants to purchase the Company’s convertible redeemable preferred stock are classified as a liability on the Consolidated Balance Sheets and carried at fair value because the warrants may conditionally obligate the Company to transfer assets at some point in the future. The Company records the warrants at fair value on issuance. The warrants are subject to remeasurement to fair value at each balance sheet date, and any change in their fair value is recognized as “ Change in Fair Value of Convertible Preferred Stock Warrants Loan Trailing Fee Liability On July 1, 2016, Prosper signed a series of agreements with WebBank which, among other things, includes an additional program fee (the “Loan Trailing Fee”) paid to WebBank in connection with the performance of each loan sold to Prosper. These agreements became effective as of August 1, 2016. The Loan Trailing Fee is dependent on the amount and timing of principal and interest payments made by borrowers of the underlying loans, irrespective of whether the loans are sold by Prosper, and gives WebBank an ongoing financial interest in the performance of the loans it originates. This fee is paid by Prosper to WebBank over the term of the respective loans and is a function of the principal and interest payments made by borrowers of such loans. In the event that principal and interest payments are not made with respect to any loan, Prosper is not required to make the related Loan Trailing Fee payment. The obligation to pay the Loan Trailing Fee for any loan sold to Prosper is recorded at fair value at the time of the origination of such loan within Other Liabilities and recorded as a reduction of “Transaction Fees, net”. Any changes in the fair value of this liability are recorded in “Servicing Fees, Net” on the Consolidated Statements of Operations. The fair value of the Loan Trailing Fee represents the present value of the expected monthly Loan Trailing Fee payments, which takes into consideration certain assumptions related to expected prepayment rates and defaults rates. Revenue Recognition Revenue primarily results from Transaction and Servicing Fees and Net Interest Income earned. Fees include Transaction Fees for our services performed on behalf of WebBank to originate a loan, as well as program fees and broker fees generated from our Credit Card product and Home Equity products, respectively. PMI also has other smaller sources of revenue reported as Other Revenues, including referral and incentive fees. Transaction Fees Prosper has a customer contract with WebBank to facilitate the origination of all Borrower Loans through Prosper’s marketplace. In exchange for these services, Prosper earns a transaction fee from WebBank that is recognized when performance is complete and upon the successful origination of a Borrower Loan. The transaction fee Prosper earns is determined by the term and credit grade of the Borrower Loan that is facilitated on Prosper’s marketplace, and ranges from 1.0% to 5.0% of the original principal amount of each Borrower Loan that WebBank originates. Prosper records the transaction fee net of any fees paid to WebBank because Prosper does not receive an identifiable benefit from WebBank other than the borrower loan that has been recognized at fair value. The Company also generates various Credit Card program fees through its partnership with Coastal. These include interchange fees, annual fees and late fees, which compensate Prosper for its role in marketing and growing the Credit Card product. Interchange and late fees are recognized as they are generated each month, while annual fees received are deferred and recognized over the annual period to which they relate. Additionally, the Company generates broker fees on Home Equity products through its partnership with Spring EQ. Servicing Fees Investors who purchase Borrower Loans from Prosper typically pay Prosper a servicing fee which is generally set at 1.0% pe r annum of the outstanding principal balance of the borrower loan prior to applying the current payment, plus an additional 0.075% per annum to cover the Loan Trailing Fee. The servicing fee compensates Prosper for the costs incurred in servicing the borrower loan, including managing payments from borrowers, managing payments to investors and maintaining investors’ account portfolios. Prosper records Servicing Fees from investors as a component of operating revenue when received. Under the Credit Card program agreement, Prosper is responsible for servicing the entire underlying Credit Card portfolio. Coastal pays the Company a 1% per annum servicing fee on the daily outstanding balance of receivables designated as Coastal Allocations. To the extent these servicing fees do not exceed the market servicing rate a market participant would require to service the entire Credit Card portfolio, the Company records a servicing obligation liability and measures it at fair value throughout the servicing period. Changes in the fair value of the servicing obligation liability are recorded in Servicing Fees. (Loss) Gain on Sale of Borrower Loans Prosper recognizes gains or losses on the sale of Borrower Loans when it sells Borrower Loans to third parties. Prosper measures gain or loss on sale of Borrower Loans as the net proceeds received on a sale less the fair value of the Borrower Loans sold. The net proceeds of the sale represent the fair value of any assets obtained or liabilities incurred as part of the transaction, including, but not limited to Servicing Assets, retained securities, repurchase obligations and any incentives provided or received at the time of sale. Interest Income on Borrower Loans and Loans Held for Sale and Interest Expense on Notes and Warehouse Lines Prosper recognizes interest income on Borrower Loans and Loans Held for Sale using the accrual method based on the stated interest rate to the extent we believe it to be collectible. We record interest expense on the corresponding Notes, at Fair Value, Notes Issued by Securitization Trust, Certificates Issued by Securitization Trust, and Warehouse Lines based on the contractual interest rates. Other Revenues Other Revenues consist primarily of credit referral fees. These fees are earned from partner companies for the referral of customers on the Company’s platform. The transaction price is a fixed amount per referral and is recognized by the Company upon a successful referral. Other revenues also include incentive fees earned from partner companies through established incentive programs and miscellaneous net fees related to the Company’s Credit Card program. As of December 31, 2022, Prosper had no contract assets, contract liabilities or deferred contract costs. As of December 31, 2022, Prosper had no unsatisfied performance obligations related to Transaction Fees or Other Revenues. Advertising Costs Advertising costs are expensed when incurred and are included in “Sales and Marketing” expense in the accompanying Consolidated Statements of Operations. Prosper incurred advertising costs of $15.0 million , $6.1 million and $6.8 million for the years ended December 31, 2022, 2021 and 2020, respectively. Stock-Based Compensation Management determines the fair value of the Company's stock options issued to employees on the date of grant using the Black-Scholes option pricing model, which is impacted by the fair value of Common Stock as well as by changes in assumptions that include, but are not limited to, the expected Common Stock price volatility over the term of the option awards, the expected term of the awards, risk-free interest rates and the expected dividend yield. PMI recognizes compensation expense for stock-based awards on a straight-line basis over the period during which an employee is required to provide services in exchange for the award (the vesting period of the award). Stock-based compensation expense is recognized only for those awards expected to vest. PMI estimates future forfeitures at the date of grant and revises the estimates, if necessary, in subsequent periods if actual forfeitures differ from estimates. Stock-based awards issued to non-employees are marked-to-market up until the point that the awards measurement period has been achieved. Compensation expense for stock options issued to non-employees is calculated using the Black-Scholes option pricing model and is recorded over the vesting period of the award. Income Taxes The asset and liability method is used to account for income taxes. Under this method, deferred income tax assets and liabilities are based on the differences between the financial statement carrying values and tax bases of assets and liabilities that will result in taxable or deductible amounts in the future based on enacted tax laws and rates applicable to the periods in which the differences are expected to affect taxable income. Valuation allowances are established when necessary to reduce deferred tax assets to the amount expected to be realized. Prosper’s policy is to include interest and penalties related to gross unrecognized tax benefits within its provision for income taxes. U.S. Federal, California and other state income tax returns are filed. Prosper is not currently undergoing any income tax examinations. Due to the cumulative net operating loss, generally all tax years remain open. Prosper recognizes benefits from uncertain tax positions only if management believes that it is more likely than not that the tax position will be sustained on examination by the taxing authorities based on the technical merits of the position. The tax benefits in the financial statements from such positions are then measured based on the largest benefit that has a greater than 50% likelihood of being realized upon settlement. Other Income, Net Other Income, Net consists primarily of interest income from Cash and Cash Equivalents and sublease income. Recent Accounting Pronouncements Accounting Standards Issued, to be Adopted by the Company in Future Periods In March 2020, the FASB issued ASU No. 2020-04, “Reference Rate Reform (Topic 848),” which provides optional expedients and exceptions for applying GAAP on contract modifications and hedge accounting, in order to ease the financial reporting burdens of the expected market transition from LIBOR and other interbank offered rates to alternative referenced rates, such as the Secured Overnight Financing Rate. The optional guidance, which became effective on March 12, 2020, could be applied through December 31, 2022. In December 2022, the FASB issued No 2022-06 extending the sunset date of the relief provided under ASU No. 2020-04 to December 31, 2024. The Company is currently evaluating the impact reference rate reform will have on its contracts that reference LIBOR in order to determine whether to adopt this guidance.
Prosper Funding LLC
Entity Information [Line Items]
SUMMARY OF SIGNIFICANT ACCOUNT POLICIES	SUMMARY OF SIGNIFICANT ACCOUNT POLICIES Basis of Presentation PFL’s consolidated financial statements include the accounts of PFL and its wholly-owned subsidiary, Prosper Depositor LLC. All intercompany balances and transactions between PFL and Prosper Depositor LLC have been eliminated in consolidation. PFL’s financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (“U.S. GAAP”). Use of Estimates The preparation of PFL’s consolidated financial statements in conformity with U.S. GAAP requires management to make certain estimates, judgments and assumptions that affect the reported amounts of assets and liabilities and the related disclosures at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting periods. These estimates, judgments and assumptions include, but are not limited to, the following: valuation of Loans Held for Sale, Borrower Loans and associated Notes, valuation of servicing rights, valuation of loan trailing fee liability, repurchase obligations, and contingent liabilities. PFL bases its estimates on historical experience from all Borrower Loans and on various other assumptions that it believes to be reasonable under the circumstances. Actual results could differ materially from estimates. Consolidation of Variable Interest Entities A variable interest entity (VIE) is a legal entity that has either a total equity investment that is insufficient to finance its activities without additional subordinated financial support or whose equity investors lack the characteristics of a controlling financial interest. PFL’s variable interest arises from contractual, ownership or other monetary interests in the entity, which change with fluctuations in the fair value of the entity’s net assets. A VIE is consolidated by its primary beneficiary, which is the party that has both the power to direct the activities that most significantly impact the VIE’s economic performance, and the obligation to absorb losses or the right to receive benefits of the VIE that could potentially be significant to the VIE. PFL consolidates a VIE when it is deemed to be the primary beneficiary. PFL assesses whether or not it is the primary beneficiary of a VIE on an ongoing basis. Transfers of Financial Assets PFL accounts for transfers of financial assets as sales when it has surrendered control over the transferred assets. Control is generally considered to have been surrendered when the transferred assets have been legally isolated from PFL, the transferee has the right to pledge or exchange the assets without any significant constraints, and PFL has not entered into a repurchase agreement, does not hold unconditional call options and has not written put options on the transferred assets. In assessing whether control has been surrendered, PFL considers whether the transferee would be a consolidated affiliate and the impact of all arrangements or agreements made contemporaneously with, or in contemplation of the transfer, even if they were not entered into at the time of transfer. PFL measures gain or loss on sale of financial assets as the net proceeds received on the sale less the carrying amount of the loans sold. The net proceeds of the sale represent the fair value of any assets obtained or liabilities incurred as part of the transaction, including, but not limited to Servicing Assets, retained securities, and recourse obligations. Fair Value Measurement Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Financial instruments consist principally of Cash and Cash Equivalents, Restricted Cash, Borrower Loans, Loans Held for Sale, Servicing Assets, Loan Trailing Fee Liability, Accounts Receivable, Accounts Payable and Accrued Liabilities, Payable to Investors and Notes. The estimated fair values of Cash and Cash Equivalents, Restricted Cash, Accounts Receivable, Accounts Payable and Accrued Liabilities, and Payable to Investors approximate their carrying values because of their short term nature. The fair value hierarchy includes a three-level classification, which is based on whether the inputs to the valuation methodology used for measurement are observable: Level 1 — Quoted market prices in active markets for identical assets or liabilities. Level 2 — Inputs other than quoted prices included in Level 1 that are observable for the asset or liability either directly or indirectly. Level 3 — Unobservable inputs. When developing fair value measurements, PFL maximizes the use of observable inputs and minimizes the use of unobservable inputs. However, for certain instruments PFL must utilize unobservable inputs in determining fair value due to the lack of observable inputs in the market, which requires greater judgment in measuring fair value. In instances where there is limited or no observable market data, fair value measurements for assets and liabilities are determined using assumptions that management believes a market participant would use in pricing the asset or liability. As observable market prices are not available for the Borrower Loans, Loans Held for Sale, Notes, and Servicing Assets, or for similar assets and liabilities, PFL believes the Borrower Loans, Loans Held for Sale, Notes, and Servicing Assets should be considered level 3 financial instruments. PFL primarily uses a discounted cash flow model to estimate their fair value and key assumptions used in valuation include default rates and prepayment rates derived from historical performance and discount rates based on estimates of the rates of return that investors would require when investing in financial instruments with similar characteristics. The obligation to pay principal and interest on any series of Notes is equal to the loan payments, if any, that are received on the corresponding Borrower Loan, net of our servicing fee which is generally 1.0% of the outstanding balance. The fair value election for Notes and Borrower Loans allows both the assets and the related liabilities to receive similar accounting treatment for expected losses which is consistent with the subsequent cash flows to investors that are dependent upon borrower payments. As such, the fair value of a series of Notes is approximately equal to the fair value of the corresponding Borrower Loan, adjusted for the 1.0% servicing fee and the timing of loan purchase, Note issuance and borrower payments. As a result, the valuation of the Notes uses the same methodology and assumptions as the Borrower Loans, except that the Notes incorporate the 1.0% servicing fee and any differences in timing in payments. Any unrealized gains or losses on the Borrower Loans and Notes for which the fair value option has been elected is recorded as a separate line item in the statement of operations. The effective interest rate associated with a group of Notes is less than the interest rate earned on the corresponding Borrower Loan due to the 1.0% servicing fee. Refer to Note 7 for addition al fair value disclosures. Cash and Cash Equivalents Cash includes various unrestricted deposits with highly rated financial institutions. Cash equivalents consist of highly liquid marketable securities with original maturities of three months or less at the time of purchase and consist primarily of money market funds, commercial paper, U.S. treasury securities and U.S. agency securities. Cash equivalents are recorded at cost, which approximates fair value. Restricted Cash Restricted Cash consists primarily of cash deposits, money market funds and short-term certificate of deposit accounts held as collateral as required for long term leases, loan funding and servicing activities, and cash that investors have on our marketplace that has not yet been invested in Borrower Loans or disbursed to the investor. Borrower Loans, Loans Held for Sale and Notes With respect to the Note Channel, PFL purchases Borrower Loans from WebBank, then issues Notes and holds the Borrower Loans until maturity. The obligation to repay a series of Notes funded through the Note Channel is dependent upon the repayment of the associated Borrower Loan. Borrower Loans and Notes funded through the Note Channel are carried on PFL’s consolidated balance sheets as assets and liabilities, respectively. PFL places Borrower Loans and Loans Held for Sale on non-accrual status when they are 120 days past due. When a loan is placed on non-accrual status, PFL stops accruing interest and reverses all accrued but unpaid interest as of such date. Additionally, PFL charges-off Borrower Loans and Loans Held for Sale when they are 120 days past due. The fair value of loans 120 days past due generally consists of the expected recovery from debt sales in subsequent periods. Management has elected the fair value option for Borrower Loans, Loans Held for Sale, and Notes. Changes in fair value of Borrower Loans are largely offset by the changes in fair value of Notes due to the borrower payment-dependent design of the Notes. Changes in fair value of Borrower Loans, Loans Held for Sale and Notes are included in “Change in Fair Value of Financial Instruments, Net” on the Consolidated Statements of Operations. PFL primarily uses a discounted cash flow model to estimate the fair value of Borrower Loans, Loans Held for Sale and Notes. The key assumptions used in the valuation include default rates and prepayment rates derived primarily from historical performance and discount rates based on estimates of the rates of return that investors would require when investing in financial instruments with similar characteristics. Servicing Assets PFL records Servicing Assets at their estimated fair values for servicing rights retained when PFL sells Borrower Loans to unrelated third-party buyers. The change in fair value of Servicing Assets is recognized in revenue as Servicing Fees, Net. The gain or loss on a loan sale is recorded in Gain on Sale of Borrower Loans while the fair value of the servicing rights, which is based on the degree to which the contractual loan servicing fee is above or below an estimated market loan servicing rate, is recorded in Servicing Assets on the Consolidated Balance Sheets. PFL uses a discounted cash flow model to estimate the fair value of Servicing Assets which considers the contractual servicing fee revenue that PFL earns on the Borrower Loans, estimated market servicing fees to service such loans, prepayment rates, default rates and the current principal balances of the Borrower Loans. Software and Website Development Software and website development represents the software and website development costs that PMI transferred to PFL. PFL does not develop any of its own software or its website. Software and website development are included in Property and Equipment, Net and amortized to expense using the straight-line method over their expected lives which is generally one Payable to Investors Payable to Investors primarily represents the Company's obligation to investors related to cash held in an account for the benefit of investors and payments-in-process received from borrowers. Loan Trailing Fee Liability On July 1, 2016, PMI signed a series of agreements with WebBank which, among other things, includes an additional program fee (the “Loan Trailing Fee”) paid to WebBank in connection with the performance of each loan sold to PMI. These agreements were effective as of August 1, 2016. The Loan Trailing Fee is dependent on the amount and timing of principal and interest payments made by borrowers of the underlying loans, irrespective of whether the loans are sold by PMI, and gives WebBank an ongoing financial interest in the performance of the loans it originates. This fee is paid by PMI to WebBank over the term of the respective loans and is a function of the principal and interest payments made by borrowers of such loans. In the event that principal and interest payments are not made with respect to any loan, PMI is not required to make the related Loan Trailing Fee payment. The obligation to pay the Loan Trailing Fee for any loan sold to PMI is recorded at fair value at the time of the origination of such loan within Other Liabilities and recorded as a reduction of “Transaction Fees, net”. Any changes in the fair value of this liability are recorded in “Servicing Fees, Net” on the Consolidated Statements of Operations. The fair value of the Loan Trailing Fee represents the present value of the expected monthly Loan Trailing Fee payments, which takes into consideration certain assumptions related to expected prepayment rates and defaults rates. Revenue Recognition Revenue primarily results from fees, net interest earned and gains on the sale of Borrower Loans. Fees consist of related party administrative fees and Servicing Fees paid by investors. The Company also has other smaller sources of revenue reported as Other Revenues including fees charged in relation to securitizations by outside investors. Administration Agreement License Fees PFL primarily generates revenues through license fees it earns through an Administration Agreement with PMI. The Administration Agreement contains a license granted by PFL to PMI that entitles PMI to use the platform for and in relation to: (i) PMI’s performance of its duties and obligations under the Administration Agreement relating to corporate administration, loan platform services, loan and Note servicing and marketing, and (ii) PMI’s performance of its duties and obligations to WebBank in relation to loan origination and funding. The license fees are based on the number of listings that are posted to the platform. Service Fees Investors who purchase Borrower Loans from PFL through the Whole Loan Channel typically pay PFL a servicing fee which is currently set at 1.0% per annum of the outstanding principal balance of the Borrower Loan prior to applying the current payment , plus an additional 0.075% per annum to cover the Loan Trailing Fee . The servicing fee com pensates PFL for the costs incurred in servicing the Borrower Loan, including managing payments from borrowers, managing payments to investors and maintaining investors’ account portfolios. PFL records Servicing Fees from investors as a component of operating revenue when received. Gain on Sale of Borrower Loans PFL recognizes gains or losses on the sale of Borrower Loans when it sells Borrower Loans to third parties. PFL measures gain or loss on sale of Borrower Loans as the net proceeds received on the sale less the fair value of the Borrower Loans sold. The net proceeds of the sale represent the fair value of any assets obtained or liabilities incurred as part of the transaction, including, but not limited to Servicing Assets, retained securities, and repurchase obligations. Interest Income on Borrower Loans and Interest Expense on Notes PFL recognizes interest income on Borrower Loans originated through the Note Channel and interest expense on the corresponding Notes using the accrual method based on the stated interest rate to the extent PFL believes it to be collectable. Administration Fee Expense - Related Party Pursuant to the Administration Agreement between PFL and PMI, PMI manages the marketplace on behalf of PFL. Accordingly each month, PFL is required to pay PMI an administration fee that is based on PMI’s (a) finance and legal personnel costs, (b) number of Borrower Loans originated through the Marketplace, (c) Servicing Fees collected by or on behalf of PFL, and (d) nonsufficient funds fees collected by or on behalf of PFL. Recent Accounting Pronouncements Accounting Standards Adopted in the Current Period No accounting standards were adopted in the current period for PFL. Accounting Standards Issued, to be Adopted in Future Periods No issued and pending accounting standards were identified that are expected to have an impact on PFL.

PROPERTY AND EQUIPMENT, NET

PROPERTY AND EQUIPMENT, NET	12 Months Ended
	Dec. 31, 2022
Entity Information [Line Items]
PROPERTY AND EQUIPMENT, NET	PROPERTY AND EQUIPMENT, NET Property and Equipment, Net consists of the following at the dates presented (in thousands): December 31, 2022 2021 Internal-use software and website development costs $ 49,818 $ 41,816 Operating lease right-of-use assets 27,051 17,485 Computer equipment 13,444 15,090 Office equipment and furniture 2,810 2,961 Leasehold improvements 7,157 7,167 Assets not yet placed in service 5,877 5,224 Property and equipment 106,157 89,743 Less: Accumulated depreciation and amortization (67,343) (60,029) Total Property and Equipment, Net $ 38,814 $ 29,714 Depreciation and amortization expense for Property and Equipment for the years ended December 31, 2022, 2021 and 2020 was $10.8 million, $9.7 million and $8.1 million, respectively. Prosper capitalized internal-use software and website development costs in the amount of $11.0 million , $9.8 million and $8.3 million for the years ended December 31, 2022, 2021 and 2020, respectively. Additionally, disclosures around the operating lease right-of-use assets are included in Note 15 .
Prosper Funding LLC
Entity Information [Line Items]
PROPERTY AND EQUIPMENT, NET	PROPERTY AND EQUIPMENT, NET Property and Equipment consist of the following as of the dates presented (in thousands): December 31, 2022 2021 Internal-use software and web site development costs $ 37,428 $ 31,979 Less: Accumulated depreciation and amortization (27,424) (24,072) Total Property and Equipment, Net $ 10,004 $ 7,907 Depreciation and amortization expense for the years ended December 31, 2022, 2021, and 2020 was $5.5 million, $4.9 million and $4.1 million, respectively. Internal-use software and web site development additions of $7.6 million,

BORROWER LOANS, LOANS HELD FOR

BORROWER LOANS, LOANS HELD FOR SALE AND NOTES, AT FAIR VALUE	12 Months Ended
	Dec. 31, 2022
Entity Information [Line Items]
BORROWER LOANS, LOANS HELD FOR SALE AND NOTES, AT FAIR VALUE	BORROWER LOANS, LOANS HELD FOR SALE AND NOTES, AT FAIR VALUEThe fair value of the Borrower Loans originated and Notes issued through the Note Channel is estimated using discounted cash flow methodologies based upon a set of valuation assumptions. The primary assumptions used to value such Borrower Loans and Notes include default rates, prepayment rates and recoveries derived from historical performance and discount rates applied to each credit grade based on the perceived credit risk of each credit grade. The obligation to pay principal and interest on any series of notes is equal to the payments, if any, received on the corresponding borrower loan, net of the servicing fee. As such, the fair value of the Notes is approximately equal to the fair value of the Borrower Loans originated through the Note Channel, adjusted for the servicing fee and the timing of borrower payments subsequently disbursed to the note holders. The effective interest rate associated with any series of notes will be less than the interest rate earned on the corresponding borrower loan due to the servicing fee. The fair value of Borrower Loans is estimated using discounted cash flow methodologies based upon a set of valuation assumptions. The primary assumptions used to value such borrower loans include default and prepayment rates derived from historical performance and discount rates based on the rates of return that investors would require when investing in financial instruments with similar characteristics. Prosper Warehouse I Trust (“PWIT”) and Prosper Warehouse II Trust (“PWIIT”), consolidated VIEs, purchase Loans Held for Sale (collectively “Warehouse Loans”) from the Company through warehouse arrangements with national banking associations and an asset manager. See Note 10 - Debt for more details. Prosper utilizes Warehouse Lines to finance Loans Held for Sale that may be subsequently contributed to securitization transactions or sold to investors. The fair value of the Loans Held for Sale is estimated using the same methodology used to value Borrower Loans. As of December 31, 2022 and 2021, Borrower Loans, Loans Held for Sale and Notes were as follows (in thousands): Borrower Loans Loans Held for Sale Notes 2022 2021 2022 2021 2022 2021 Aggregate principal balance outstanding $ 333,294 $ 265,232 $ 512,076 $ 242,278 $ 336,555 $ 267,415 Fair value adjustments (12,652) 2,394 (12,311) 892 (17,851) (1,430) Fair value $ 320,642 $ 267,626 $ 499,765 $ 243,170 $ 318,704 $ 265,985 Borrower Loans As of December 31, 2022, outstanding Borrower Loans had original terms to maturity of 24, 36, 48 or 60 months, had monthly payments with fixed interest rates ranging fro m 5.31% to 33.00% and had various original maturity dates through December 2027 . At December 31, 2021, outstanding Borrower Loans had original terms to maturity of either 36 months or 60 months, had monthly payments with fixed interest rates ranging from 5.31% to 31.82% and had various original maturity dates through December 2026. As of December 31, 2022, the Borrower Loans that were 90 days or more delinquent had an aggregate principal amount of $2.7 million and a fair value of $0.3 million. As of December 31, 2021, the Borrower Loans that were 90 days or more delinquent had an aggregate principal amount of $0.9 million and a fair value of $0.1 million. We place loans on non-accrual status when they are over 120 days past due. As of December 31, 2022 and 2021, Borrower Loans in non-accrual status had a fair value of $0.3 million and $0.1 million, respectively. Loans Held for Sale As of December 31, 2022, outstanding Loans Held for Sale had original terms to maturity of 24, 36, 48 or 60 months, had monthly payments with fixed interest rates ranging from 5.31% to 33.00% and had various original maturity dates through December 2027. At December 31, 2021, outstanding Loans Held for Sale had original terms to maturity of either 36 months or 60 months, had monthly payments with fixed interest rates rangin g from 5.31% to 31.82% and had various original maturity dates through December 2026. The Company earned i nterest income earned on Loans Held for Sale of $41.0 million and $32.6 million for the years ending December 31, 2022 and 2021, respectively. As of December 31, 2022, Loans Held for S ale that were 90 days or more delinquent, had an aggregate principal amo unt of $2.1 million and a fair value of $0.2 million. As of December 31, 2021, Loans Held for S ale that were 90 days or more delinquent, had an aggregate principal amount of $0.8 million and a fair value of $0.1 million . PMI places loans on non-accrual status when they are over 120 days past due. As of December 31, 2022 and December 31, 2021, Loans Held for Sale in non-accrual status had a fair value of $0.2 million and $0.1 million, respectively.
Prosper Funding LLC
Entity Information [Line Items]
BORROWER LOANS, LOANS HELD FOR SALE AND NOTES, AT FAIR VALUE	BORROWER LOANS AND NOTES, AT FAIR VALUE The fair value of Borrower Loans and Notes issued through the Note Channel is estimated using discounted cash flow methodologies based upon a set of valuation assumptions. The primary assumptions used to value such Borrower Loans and Notes include default and prepayment rates derived from historical performance and discount rates that reflect estimates of the rates of return that investors would require when investing in financial instruments with similar characteristics. The obligation to pay principal and interest on any series of Notes is equal to the payments, if any, received on the corresponding borrower loan, net of the servicing fee. As such, the fair value of Notes is approximately equal to the fair value of Borrower Loans originated through the Note Channel, adjusted for the servicing fee and the timing of borrower payments subsequently disbursed to the note holders. The effective interest rate associated with a series of notes will be less than the interest rate earned on the corresponding borrower loan due to the servicing fee. The aggregate principal balances outstanding and fair values of Borrower Loans and Notes as of December 31, 2022 and 2021, are presented in the following table (in thousands): Borrower Loans Notes December 31, 2022 December 31, 2021 December 31, 2022 December 31, 2021 Aggregate principal balance outstanding $ 333,294 $ 265,232 $ 336,555 $ 267,415 Fair value adjustments (12,652) 2,394 (17,851) (1,430) Fair value $ 320,642 $ 267,626 $ 318,704 $ 265,985 As of December 31, 2022, outstanding Borrower Loans had original terms to maturity of 24, 36, 48 or 60 months, had monthly payments with fixed interest rates ranging fro m 5.31% to 33.00% and had various original maturity dates through December 2027. At December 31, 2021, Borrower Loans had original maturities of either 36 months or 60 months, had monthly payments with fixed interest rates ranging from 5.31% to 31.82% and had various original maturity dates through December 2026. As of December 31, 2022, Borrower Loans that were 90 days or more delinquent had an aggregate principal amount of $2.7 million and a fair value of $0.3 million. As of December 31, 2021, Borrower Loans that were 90 days or more delinquent had an aggregate principal amount of $0.9 million and a fair value of $0.1 million. PFL places loans on non-accrual status when they are over 120 days past due. As of December 31, 2022 and 2021, Borrower Loans i n non-accrual status had a fair value of $0.3 million and $0.1 million, respectively.

CREDIT CARD

CREDIT CARD	12 Months Ended
	Dec. 31, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
CREDIT CARD	CREDIT CARD Prosper recognizes gains and losses on the Credit Card Derivative within Change in Fair Value of Financial Instruments on the accompanying Consolidated Statement of Operations. For the year ended December 31, 2022 the Company recognize d $9.8 million of unrealized gains from fair value changes on the Credit Card Derivative. Gains from settled transactions underlying the Credit Card Derivative were $4.3 million for the year ended December 31, 2022, and are also included in Change in Fair Value of Financial Instruments on the accompanying Consolidated Statements of Operations. The fair value of the Credit Card Derivative is $10.8 million as of December 31, 2022. The Company records revenue from various fees earned from the Credit Card program, including interchange fees, annual fees and late fees, net of a portion of the interchange fees that must be remitted to Coastal. For the year ended December 31, 2022, these fees totaled $7.0 million and are included in Transaction Fees on the accompanying Consolidated Statement of Operations. Under the program agreement, Prosper is responsible for servicing the entire underlying Credit Card portfolio. Coastal pays the Company a 1% per annum servicing fee on the daily outstanding balance of receivables designated as Coastal Allocations. To the extent these servicing fees do not exceed the market servicing rate a market participant would require to service the entire Credit Card portfolio, the Company records a servicing obligation liability and measures it at fair value through the servicing period. As of December 31, 2022, the net balance of this servicing obligation liability is $3.5 million and is included in Other Liabilities on the accompanying consolidated financial statements. Changes in the fair value of the servicing obligation liability are recorded in Servicing Fees, Net on the accompanying Consolidated Statement of Operations, and totaled $3.7 million for t he year ended December 31, 2022.

SERVICING ASSETS

SERVICING ASSETS	12 Months Ended
	Dec. 31, 2022
Entity Information [Line Items]
SERVICING ASSETS	SERVICING ASSETS Prosper accounts for Servicing Assets at their estimated fair values with changes in fair values recorded in Servicing Fees, Net on the accompanying Consolidated Statements of Operations. The initial asset or liability is recognized when Prosper sells Borrower Loans to unrelated third-party buyers through the Whole Loan Channel and the servicing rights are retained. The Servicing Assets are measured at fair value throughout the servicing period. The total gains and losses recognized on the sale of such Borrower Loans on the Consolidated Statement of Operations were a loss of $1.0 million, a gain of $7.2 million and a gain of $4.8 million for the years ended December 31, 2022, 2021 and 2020, respectively. As of December 31, 2022, Borrower Loans that were sold, but for which Prosper retained servicing rights, had a total outstanding principal balance o f $3.2 billion, original terms to maturity of 24, 36, 48 or 60 months, monthly payments with fixed interest rates ranging from 5.31% to 33.00%, and variou s original maturity dates through December 2027. As of December 31, 2021, Borrower Loans that were sold, but for which Prosper retained servicing rights, had a total outstanding principal balance of $2.3 billion , original terms to maturity of either 36 months or 60 months, monthly payments with fixed interest rates ranging from 5.31% to 31.82%, and various original maturity dates through December 2026. Contractually-specified servicing fees and ancillary fees totaling $28.9 million , $24.8 million and $28.9 million are included on the Consolidated Statements of Operations in Servicing Fees, Net for the years ended December 31, 2022, 2021 and 2020, respectively. Fair Value Valuation Method Prosper uses a discounted cash flow valuation methodology generally consisting of developing an estimate of future cash flows that are expected to occur over the life of a financial instrument and then discounts those cash flows at a rate of return that results in the fair value amount. Significant unobservable inputs presented in the table within Note 7 below are those that Prosper considers significant to the estimated fair values of the Level 3 Servicing Assets. The following is a description of the significant unobservable inputs provided in the table. Market Servicing Rate Prosper estimates adequate market servicing rates that would fairly compensate a substitute servicer should one be required, which includes the profit that would be demanded in the marketplace. This rate is stated as a fixed percentage of outstanding principal balance on a per annum basis. With the assistance of a valuation specialist, Prosper estimates these market servicing rates based on observable market rates for other loan types in the industry and bids from subservicing providers, adjusted for the unique loan attributes that are present in the specific loans that Prosper sells and services and information from backup service providers. Discount Rate The discount rate is a rate of return used to discount future expected cash flows to arrive at a present value, which represents the fair value of the loan servicing rights. We use a range of discount rates for the Servicing Assets based on comparable observed valuations of similar assets and publicly available disclosures related to servicing valuations, with comparability adjustments made to account for differences with Prosper’s servicing assets. Default Rate The default rate presented in Note 7 is an annualized, average estimate considering all Borrower Loan categories (i.e., risk ratings and duration), and represents an aggregate of conditional default rate curves for each credit grade or Borrower Loan category. Each point on a particular Borrower Loan category’s curve represents the percentage of principal expected to default per period based on the term and age of the underlying Borrower Loans. The assumption regarding defaults directly reduces servicing revenues because the amount of servicing revenues received is based on the amount collected each period. Prepayment Rate The prepayment rate presented in Note 7 is an annualized, average estimate considering all Borrower Loan categories (i.e., risk ratings and duration), and represents an aggregate of conditional prepayment rate curves for each credit grade or Borrower Loan category. Each point on a particular Borrower Loan category’s curve represents the percentage of principal expected to prepay per period based on the term and age of the underlying Borrower Loans. Prepayments reduce servicing revenues as they shorten the period over which we expect to collect fees on the Borrower Loans, which is used to project future servicing revenues.
Prosper Funding LLC
Entity Information [Line Items]
SERVICING ASSETS	SERVICING ASSETS PFL accounts for Servicing Assets at their estimated fair values with changes in fair values recorded in Servicing Fees, Net on the Consolidated Statements of Operations. The initial asset is recognized when PFL sells Borrower Loans to unrelated third-party buyers through the Whole Loan Channel and the servicing rights are retained. The total recognized gains and losses on the sale of such Borrower Loans were a $1.7 million gain, a $8.5 million gain and a $6.4 million gain for the years ended December 31, 2022, 2021, and 2020, respectively. At December 31, 2022, Borrower Loans that were sold, but for which PFL retained servicing rights, had a total outstanding principal balance of $3.7 billion , original terms of 24, 36, 48 or 60 months , monthly payments with fixed interest rates rangi ng from 5.31% to 33.00% and variou s original maturity dates through December 2027. At December 31, 2021, Borrower Loans that were sold, but for which PFL retained servicing rights, had a total outstanding principal balance of $2.5 billion, original terms of either 36 or 60 months, monthly payments with fixed interest rates ranging from 5.31% to 31.82% and various original maturity dates through December 2026. Contractually-specified servicing fees and ancillary fees totaled $33.8 million, $29.2 million and $34.8 million for the years ended December 31, 2022, 2021, and 2020, respectively, and are included in Servicing Fees, Net on the Statement of Operations. Fair Value Valuation Method PFL uses a discounted cash flow valuation methodology generally consisting of developing an estimate of future cash flows that are expected to occur over the life of a financial instrument and then discounting those cash flows at a rate of return that results in the fair value amount. Significant unobservable inputs presented in the table within Note 7 are those that PFL considers significant to the estimated fair values of the Level 3 Servicing Assets. The following is a description of the significant unobservable inputs provided in the table. Market Servicing Rate PFL estimates adequate market servicing rates that would fairly compensate a substitute servicer should one be required, which includes the profit that would be demanded in the marketplace. This rate is stated as a fixed percentage of outstanding principal balance on a per annum basis. With the assistance of a valuation specialist, PFL estimates these market servicing rates based on observable market rates for other loan types in the industry and bids from sub-servicing providers, adjusted for the unique loan attributes that are present in the specific loans that PFL sells and services and information from backup service providers. Discount Rate The discount rate is a rate of return used to discount future expected cash flows to arrive at a present value, which represents the fair value of the loan servicing rights. Management used a range of discount rates for the Servicing Assets based on comparable observed valuations of similar assets and publicly available disclosures related to servicing valuations, with comparability adjustments made to account for differences with PFL’s Servicing Assets. Default Rate The default rate presented in Note 7 is an annualized, average estimate considering all Borrower Loan categories (i.e., risk ratings and duration), and represents an aggregate of conditional default rate curves for each credit grade or borrower loan category. Each point on a particular borrower loan category’s curve represents the percentage of principal expected to default per period based on the term and age of the underlying Borrower Loans. The assumption regarding defaults directly reduces servicing revenues because the amount of servicing revenues received is based on the amount collected each period. Prepayment Rate The prepayment rate presented in Note 7 is an annualized, average estimate considering all borrower loan categories (i.e., risk ratings and duration), and represents an aggregate of conditional prepayment rate curves for each credit grade or borrower loan category. Each point on a particular borrower loan category’s curve represents the percentage of principal expected to prepay per period based on the term and age of the underlying Borrower Loans. Prepayments reduce servicing revenues as they shorten the period over which PFL expects to collect fees on the Borrower Loans, which is used to project future servicing revenues.

FAIR VALUE OF ASSETS AND LIABIL

FAIR VALUE OF ASSETS AND LIABILITIES	12 Months Ended
	Dec. 31, 2022
Entity Information [Line Items]
FAIR VALUE OF ASSETS AND LIABILITIES	FAIR VALUE OF ASSETS AND LIABILITIES For a description of the fair value hierarchy and Prosper’s fair value methodologies, see Note 2 - Summary of Significant Accounting Policies. Prosper did not transfer any assets or liabilities in or out of Level 3 during the year ended December 31, 2022 or 2021. Financial Instruments Recorded at Fair Value The fair value of the Borrower Loans, Loans Held for Sale, Notes, Servicing Assets and Liabilities and loan trailing fee liability are estimated using discounted cash flow methodologies based upon a set of valuation assumptions. The primary assumptions used in the discounted cash flow model include default and prepayment rates primarily derived from historical performance and discount rates applied to each credit grade based on the perceived credit risk of each credit grade. The fair value of the Credit Card Derivative is also estimated using a discounted cash flow model using certain assumptions. The key assumptions used in the valuation include default and prepayment rates derived primarily from historical performance and relevant market data, adjusted as necessary based on the perceived credit risk of the underlying portfolio. In addition, discount rates based on estimates of the rates of return that investors would require when investing in similar credit card portfolios are applied to the individual freestanding derivatives. When utilizing market data and bid-ask spreads, Prosper uses the price within the bid-ask spread that best represents fair value. When quoted prices do not exist, Prosper uses prices obtained from independent third-party pricing services to measure the fair value of investment assets. Prosper's primary independent pricing service provides prices based on observable trades and discounted cash flows that incorporate observable information, such as yields for similar types of securities (a benchmark interest rate plus observable spreads) and weighted-average maturity for the same or similar securities. The Company compares the prices obtained from its primary independent pricing service to the prices obtained from the additional independent pricing services to determine if the price obtained from the primary independent pricing service is reasonable. The Company does not adjust the prices received from independent third-party pricing services unless such prices are inconsistent with the definition of fair value and result in a material difference in the recorded amounts. The Convertible Preferred Stock Warrant Liability is valued using a Black-Scholes option pricing model. Refer to Note 12 for additional information. The following tables present the fair value hierarchy for assets and liabilities measured at fair value (in thousands): Balance at December 31, 2022 Level 1 Inputs Level 2 Inputs Level 3 Inputs Total Assets: Borrower Loans, at Fair Value $ — $ — $ 320,642 $ 320,642 Loans Held for Sale, at Fair Value — — 499,765 499,765 LIBOR rate swaption (Note 10) — 1,289 — 1,289 Servicing Assets — — 12,562 12,562 Credit Card Derivative (Note 5) — — 10,782 10,782 Total Assets $ — $ 1,289 $ 843,751 $ 845,040 Liabilities: Notes, at Fair Value $ — $ — $ 318,704 $ 318,704 Convertible Preferred Stock Warrant Liability — — 166,346 166,346 Loan Trailing Fee Liability (Note 9) — — 3,290 3,290 Credit Card servicing obligation liability (Note 5) — — 3,720 3,720 Total Liabilities $ — $ — $ 492,060 $ 492,060 Balance at December 31, 2021 Level 1 Inputs Level 2 Inputs Level 3 Inputs Total Assets: Borrower Loans, at Fair Value $ — $ — $ 267,626 $ 267,626 Loans Held for Sale, at Fair Value — — 243,170 243,170 LIBOR rate swaption — 66 — 66 Servicing Assets — — 8,761 8,761 Total Assets $ — $ 66 $ 519,557 $ 519,623 Liabilities: Notes, at Fair Value $ — $ — $ 265,985 $ 265,985 Convertible Preferred Stock Warrant Liability — — 250,941 250,941 Loan Trailing Fee Liability (Note 9) — — 2,161 2,161 Total Liabilities $ — $ — $ 519,087 $ 519,087 As PMI’s Borrower Loans, Loans Held for Sale, Notes, Convertible Preferred Stock Warrant Liability, Servicing Assets and Liability, Credit Card Derivative and loan trailing fee liability do not trade in an active market with readily observable prices, the Company uses significant unobservable inputs to measure the fair value of these assets and liabilities. Financial instruments are categorized in the Level 3 valuation hierarchy based on the significance of unobservable factors in the overall fair value measurement. These fair value estimates may also include observable, actively quoted components derived from external sources. As a result, gains and losses for assets and liabilities within the Level 3 category may include changes in fair value that were attributable to both observable and unobservable inputs. Prosper did not transfer any assets or liabilities in or out of Level 3 for the year ended December 31, 2022 and 2021. Significant Unobservable Inputs The following tables present quantitative information about the ranges of significant unobservable inputs used for the Company’s Level 3 fair value measurements at December 31, 2022 and 2021: December 31, 2022 2021 Borrower Loans, Loans Held for Sale, and Notes: Discount rate 5.4 % — 13.2 % 4.2 % — 14.3 % Default rate 1.8 % — 18.7 % 2.0 % — 14.1 % At December 31, 2022 and 2021, the discounted cash flow methodology used to estimate the Note fair values used the same projected cash flows as the related Borrower Loans. December 31, 2022 2021 Servicing Assets: Discount rate 15.0 % — 25.0 % 15.0 % — 25.0 % Default rate 2.0 % — 19.3 % 1.5 % — 14.1 % Prepayment rate 14.2 % — 28.0 % 10.2 % — 32.3 % Market servicing rate (1) (2) 0.648 % — 0.842 % 0.648 % — 0.842 % (1) Servicing assets associated with loans enrolled in a relief program offered by the Company in response to the COVID-19 pandemic as of December 31, 2022 were measured using a market servicing rate assumption of 84.2 basis points. This rate was estimated using a multiplier consistent with observable market rates for other loan types, applied to the base market servicing rate assumption of 64.8 basis points. (2) Excludes collection fees that would be passed on to a hypothetical third-party servicer. As of December 31, 2022 and 2021, the market rate for collection fees and non-sufficient fund fees was assumed to be 6 basis points and 6 basis points, respectively, for a weighted-average total market servicing rat e of 70.8 basis points to 90.2 basis points and 70.8 basis points to 90.2 basis points, respectively. December 31, 2022 2021 Loan Trailing Fee Liability: Discount rate 15.0 % — 25.0 % 15.0 % — 25.0 % Default rate 2.0 % — 19.3 % 1.5 % — 14.1 % Prepayment rate 14.2 % — 28.0 % 10.2 % — 32.3 % Ranges of inputs are not applied to the Credit Card Derivative and Credit Card servicing obligation liability, as they are valued at the portfolio level. Refer below for a summary of the significant unobservable inputs associated with those Level 3 fair value measurements. Changes in Level 3 Fair Value Assets and Liabilities on a Recurring Basis The following table presents additional information about Level 3 Loans Held for Sale, Borrower Loans, Notes and Certificates Issued by Securitization Trust measured at fair value on a recurring basis for the year ended December 31, 2022 and 2021 (in thousands): Assets Liabilities Borrower Loans Held Notes Certificates Issued by Securitization Trust Total Fair Value at January 1, 2021 $ 378,263 $ 274,621 $ (208,379) $ (22,917) $ 421,588 Purchase of Borrower Loans/Issuance of Notes 232,000 1,712,705 (231,933) — 1,712,772 Principal repayments (260,689) (164,165) 172,250 14,934 (237,670) Borrower Loans sold to third parties (2,664) (1,580,164) — — (1,582,828) Other changes (1,518) (249) 167 113 (1,487) Change in fair value 595 422 1,910 (6,110) (3,183) Deconsolidation of VIEs (78,361) — — 13,980 (64,381) Fair Value at December 31, 2021 267,626 243,170 (265,985) — 244,811 Purchase of Borrower Loans/Issuance of Notes 284,921 3,063,729 (285,115) — 3,063,535 Principal repayments (187,599) (184,090) 202,308 — (169,381) Borrower Loans sold to third parties (14,520) (2,599,881) — — (2,614,401) Other changes 650 1,804 (742) — 1,712 Change in fair value (30,436) (24,967) 30,830 — (24,573) Fair Value at December 31, 2022 $ 320,642 $ 499,765 $ (318,704) $ — $ 501,703 The following table presents additional information about the Level 3 Servicing Assets measured at fair value on a recurring basis for the year ended December 31, 2022 and 2021 (in thousands): Servicing Assets Fair Value at January 1, 2021 $ 9,242 Additions 7,973 Recognition of Servicing Assets upon deconsolidation of VIEs 215 Less: Change in fair value (8,669) Fair Value at December 31, 2021 $ 8,761 Additions 12,957 Less: Change in fair value (9,156) Fair Value at December 31, 2022 $ 12,562 The following table presents additional information ab out the Level 3 Credit Card Derivative measured at fair value on a recurring basis for the year ended December 31, 2022 and 2021 (in tho usands): Credit Card Derivative Fair Value at December 31, 2020 $ — Change in fair value 7 Fair Value at December 31, 2021 $ 7 Change in fair value 9,784 Gains from settled transactions 4,295 Less: Net payments received (3,304) Fair Value at December 31, 2022 $ 10,782 The following table presents additional information ab out the Level 3 Credit Card servicing obligation liability measured at fair value on a recurring basis for the year ended December 31, 2022 (in tho usands). There was no material activity related to this account for the year ended December 31, 2021. Credit Card Servicing Obligation Liability Fair Value at December 31, 2021 $ — Change in fair value 3,720 Fair Value at December 31, 2022 $ 3,720 The following table presents additional information about the Level 3 Convertible Preferred Stock Warrant Liability measured at fair value on a recurring basis for the year ended December 31, 2022 and 2021 (in thousands): Convertible Preferred Stock Warrant Liability Fair Value at January 1, 2021 $ 112,319 Change in fair value 138,622 Fair Value at December 31, 2021 $ 250,941 Change in fair value (84,595) Fair Value at December 31, 2022 $ 166,346 Loan Trailing Fee The fair value of the Loan Trailing Fee represents the present value of the expected monthly Loan Trailing Fee payments, which takes into consideration certain assumptions related to expected prepayment rates and default rates using a discounted cash flow model. The assumptions used are the same as those used for the valuation of Servicing Assets, as described below. The following table presents additional information about Level 3 Loan Trailing Fee Liability measured at fair value on a recurring basis for the year ended December 31, 2022 and 2021 (in thousands): Loan Trailing Fee Liability Balance at January 1, 2021 $ 2,233 Issuances 1,775 Cash payment of Loan Trailing Fee (2,100) Change in fair value 253 Balance at December 31, 2021 $ 2,161 Issuances 3,070 Cash payment of Loan Trailing Fee (2,245) Change in fair value 304 Balance at December 31, 2022 $ 3,290 Significant Recurring Level 3 Fair Value Input Sensitivity Key economic assumptions and the sensitivity of the fair value to immediate changes in those assumptions at December 31, 2022 and 2021 for Borrower Loans and Loans Held for Sale are presented in the following table (in thousands, except percentages). Borrower Loans and Loans Held for Sale: December 31, 2022 December 31, 2021 Fair value, using the following assumptions: $ 820,407 $ 510,796 Weighted-average discount rate 6.72 % 5.64 % Weighted-average default rate 9.31 % 10.08 % Fair value resulting from: 100 basis point increase in discount rate $ 812,061 $ 505,732 200 basis point increase in discount rate $ 803,927 500,763 Fair value resulting from: 100 basis point decrease in discount rate $ 828,975 $ 516,064 200 basis point decrease in discount rate $ 837,773 521,437 Fair value resulting from: Applying a 1.1 multiplier to default rate $ 810,657 $ 506,362 Applying a 1.2 multiplier to default rate $ 800,989 501,921 Fair value resulting from: Applying a 0.9 multiplier to default rate $ 830,238 $ 515,326 Applying a 0.8 multiplier to default rate $ 840,156 519,851 Key economic assumptions and the sensitivity of the fair value to immediate changes in those assumptions at December 31, 2022 and 2021 for Notes are presented in the following table (in thousands, except percentages). Notes: December 31, 2022 December 31, 2021 Fair value, using the following assumptions: $ 318,704 $ 265,985 Weighted-average discount rate 6.87 % 5.76 % Weighted-average default rate 11.36 % 10.70 % Fair value resulting from: 100 basis point increase in discount rate $ 315,456 $ 263,326 200 basis point increase in discount rate $ 312,291 260,735 Fair value resulting from: 100 basis point decrease in discount rate $ 322,037 $ 268,714 200 basis point decrease in discount rate $ 325,461 271,516 Fair value resulting from: Applying a 1.1 multiplier to default rate $ 314,892 $ 263,644 Applying a 1.2 multiplier to default rate $ 311,112 261,318 Fair value resulting from: Applying a 0.9 multiplier to default rate $ 322,547 $ 268,340 Applying a 0.8 multiplier to default rate $ 326,425 270,711 Key economic assumptions and the sensitivity of the fair value to immediate changes in those assumptions at December 31, 2022 and 2021 for Servicing Assets is presented in the following table (in thousands, except percentages). Servicing Assets: December 31, 2022 December 31, 2021 Fair value, using the following assumptions: $ 12,562 $ 8,761 Weighted-average market servicing rate 0.650 % 0.650 % Weighted-average prepayment rate 18.47 % 20.82 % Weighted-average default rate 13.38 % 12.54 % Fair value resulting from: Market servicing rate increase of 0.025% $ 11,708 $ 8,203 Market servicing rate decrease of 0.025% $ 13,415 $ 9,320 Fair value resulting from: Applying a 1.1 multiplier to prepayment rate $ 12,286 $ 8,568 Applying a 0.9 multiplier to prepayment rate $ 12,842 $ 8,957 Fair value resulting from: Applying a 1.1 multiplier to default rate $ 12,305 $ 8,646 Applying a 0.9 multiplier to default rate $ 12,820 $ 8,878 Key economic assumptions and the sensitivity of the fair value to immediate changes in those assumptions at December 31, 2022 for the Credit Card Derivative is presented in the following table (in thousands, except percentages). Credit Card Derivative: December 31, 2022 Fair value, using the following assumptions: $ 10,782 Discount rate on Prosper Allocations 26.23 % Discount rate on Coastal Program Fee 9.26 % Prepayment rate applied to Credit Card portfolio 10.08 % Default rate applied to Credit Card portfolio 13.34 % Fair value resulting from: 100 basis point increase in both discount rates $ 10,699 200 basis point increase in both discount rates $ 10,618 Fair value resulting from: 100 basis point decrease in both discount rates $ 10,866 200 basis point decrease in both discount rates $ 10,951 Fair value resulting from: Applying a 1.1 multiplier to prepayment rate $ 10,625 Applying a 0.9 multiplier to prepayment rate $ 10,942 Fair value resulting from: Applying a 1.1 multiplier to default rate $ 8,001 Applying a 0.9 multiplier to default rate $ 13,641 Key economic assumptions and the sensitivity of the fair value to immediate changes in those assumptions at December 31, 2022 for Credit Card servicing obligation liability is presented in the following table (in thousands, except percentages). Credit Card servicing obligation liability: December 31, 2022 Fair value, using the following assumptions: 3,720 Discount rate on Credit Card portfolio servicing obligation 9.26 % Prepayment rate applied to Credit Card portfolio 10.08 % Default rate applied to Credit Card portfolio 13.34 % Market servicing rate 2.00 % Fair value resulting from: 100 basis point increase in discount rate $ 3,677 200 basis point increase in discount rate $ 3,616 Fair value resulting from: 100 basis point decrease in discount rate $ 3,774 200 basis point decrease in discount rate $ 3,830 Fair value resulting from: Applying a 1.1 multiplier to prepayment rate $ 3,662 Applying a 0.9 multiplier to prepayment rate $ 3,779 Fair value resulting from: Applying a 1.1 multiplier to default rate $ 3,636 Applying a 0.9 multiplier to default rate $ 3,806 These sensitivities are hypothetical and should be evaluated with care. The effect on fair value of a variation in assumptions generally cannot be determined because the relationship of the change in assumptions to the fair value may not be linear. Additionally, the impact of a variation in a particular assumption on the fair value is calculated while holding other assumptions constant. In reality, changes in one factor may lead to changes in other factors, which could impact the above hypothetical effects. Assets and Liabilities Not Recorded at Fair Value The following tables present the fair value hierarchy for assets and liabilities not recorded at fair value (in thousands): Balance at December 31, 2022 Carrying Amount Level 1 Inputs Level 2 Inputs Level 3 Inputs Fair Value Assets: Cash and Cash Equivalents $ 83,446 $ 83,446 $ — $ — $ 83,446 Restricted Cash - Cash and Cash Equivalents 108,284 108,284 — — 108,284 Restricted Cash - Certificates of Deposit 4,879 — 4,879 — 4,879 Accounts Receivable 3,462 — 3,462 — 3,462 Total Assets $ 200,071 $ 191,730 $ 8,341 $ — $ 200,071 Liabilities: Accounts Payable and Accrued Liabilities $ 37,254 $ — $ 37,254 $ — $ 37,254 Payable to Investors 85,312 — 85,312 — 85,312 Warehouse Lines 446,762 — 444,329 — 444,329 Term Loan (Note 10) 73,407 — 76,191 — 76,191 Total Liabilities $ 642,735 $ — $ 643,086 $ — $ 643,086 Balance at December 31, 2021 Carrying Amount Level 1 Inputs Level 2 Inputs Level 3 Inputs Fair Value Assets: Cash and Cash Equivalents $ 67,700 $ 67,700 $ — $ — $ 67,700 Restricted Cash - Cash and Cash Equivalents 163,047 163,047 — — 163,047 Restricted Cash - Certificates of Deposit 4,878 — 4,878 — 4,878 Accounts Receivable 1,054 — 1,054 — 1,054 Total Assets $ 236,679 $ 230,747 $ 5,932 $ — $ 236,679 Liabilities: Accounts Payable and Accrued Liabilities $ 25,790 $ — $ 25,790 $ — $ 25,790 Payable to Investors 152,794 — 152,794 — 152,794 Warehouse Lines 209,275 — 211,177 — 211,177 Paycheck Protection Program loan (Note 10) 8,590 — 8,556 — 8,556 Total Liabilities $ 396,449 $ — $ 398,317 $ — $ 398,317 The estimated fair values of Cash and Cash Equivalents, Restricted Cash, Accounts Receivable, Accounts Payable and Accrued Liabilities and Payable to Investors approximate their carrying values because of their short-term nature.
Prosper Funding LLC
Entity Information [Line Items]
FAIR VALUE OF ASSETS AND LIABILITIES	FAIR VALUE OF ASSETS AND LIABILITIES PFL has elected to record certain financial instruments at fair value on the balance sheet. PFL classifies Borrower Loans, Loans Held for Sale and Notes as financial instruments and assesses their fair value on a quarterly basis for financial statement presentation purposes. Gains and losses on these financial instruments are shown separately on the Consolidated Statements of Operations. As of December 31, 2022 and 2021, the discounted cash flow methodology used to estimate the Note fair values used the same projected cash flows as the related Borrower Loans. As demonstrated in the following table, the fair value adjustments for Borrower Loans were largely offset by the fair value adjustments of the Notes due to the borrower payment dependent design of the Notes and because the principal balances of the Borrower Loans approximated the principal balances of the Notes. For a description of the fair value hierarchy and PFL’s fair value methodologies, see Note 2 - Summary of Significant Accounting Policies. PFL did not transfer any assets or liabilities in or out of Level 3 during the year ended December 31, 2022 and 2021. Financial Instruments Recorded at Fair Value The fair value of the Borrower Loans and Notes are estimated using discounted cash flow methodologies based upon a set of valuation assumptions. The primary cash flow assumptions used to value such Borrower Loans and Notes include default and prepayment rates derived from historical performance and discount rates that reflect estimates of the rates of return that investors would require when investing in financial instruments with similar characteristics. The following tables present the fair value hierarchy for assets and liabilities measured at fair value (in thousands): December 31, 2022 Level 1 Inputs Level 2 Inputs Level 3 Inputs Total Assets: Borrower Loans, at Fair Value $ — $ — $ 320,642 $ 320,642 Servicing Assets — — 14,860 14,860 Total Assets $ — $ — $ 335,502 $ 335,502 Liabilities: Notes, at Fair Value $ — $ — $ 318,704 $ 318,704 Loan Trailing Fee Liability* — — 3,290 3,290 Total Liabilities $ — $ — $ 321,994 $ 321,994 December 31, 2021 Level 1 Inputs Level 2 Inputs Level 3 Inputs Total Assets: Borrower Loans, at Fair Value $ — $ — $ 267,626 $ 267,626 Servicing Assets — — 9,796 9,796 Total Assets $ — $ — $ 277,422 $ 277,422 Liabilities: Notes, at Fair Value $ — $ — $ 265,985 $ 265,985 Loan Trailing Fee Liability* — — 2,161 2,161 Total Liabilities $ — $ — $ 268,146 $ 268,146 *Included in Other Liabilities on the Consolidated Balance Sheets. As PFL’s Borrower Loans, Notes, Servicing Assets and loan trailing fee liability do not trade in an active market with readily observable prices, PFL uses significant unobservable inputs to measure the fair value of these assets and liabilities. Financial instruments are categorized in the Level 3 valuation hierarchy based on the significance of unobservable factors in the overall fair value measurement. These fair value estimates may also include observable, actively quoted components derived from external sources. As a result, the realized and unrealized gains and losses for assets and liabilities within the Level 3 category may include changes in fair value that were attributable to both observable and unobservable inputs. Significant Unobservable Inputs The following tables present quantitative information about the significant unobservable inputs used for PFL’s Level 3 fair value measurements at the dates presented: Range Borrower Loans and Notes: December 31, 2022 December 31, 2021 Discount rate 5.6 % — 12.9 % 4.3 % — 13.9 % Default rate 1.8 % — 18.2 % 2.0 % — 13.5 % Range Servicing Assets: December 31, 2022 December 31, 2021 Discount rate 15.0 % — 25.0 % 15.0 % — 25.0 % Default rate 2.0 % — 19.3 % 1.5 % — 14.1 % Prepayment rate 14.2 % — 28.0 % 10.2 % — 32.3 % Market servicing rate (1) (2) 0.648 % — 0.842 % 0.648 % — 0.842 % (1) Servicing assets associated with loans enrolled in a relief program offered by the Company in response to the COVID-19 pandemic as of December 31, 2022 and 2021 were measured using a market servicing rate assumption of 84.2 basis points. This rate was estimated using a multiplier consistent with observable market rates for other loan types, applied to the base market servicing rate assumption of 64.8 basis points. (2) Excludes collection fees that would be passed on to a hypothetical third-party servicer. As of December 31, 2022 and 2021, the market rate for collection fees and non-sufficient fund fees was assumed to be 6 basis points and 6 basis points, respectively, for a weighted-average total market servicing rate of 70.8 basis points to 90.2 basis points and 70.8 basis points to 90.2 basis points, respectively. Range Loan Trailing Fee Liability: December 31, 2022 December 31, 2021 Discount rate 15.0 % — 25.0 % 15.0 % — 25.0 % Default rate 2.0 % — 19.3 % 1.5 % — 14.1 % Prepayment rate 14.2 % — 28.0 % 10.2 % — 32.3 % Changes in Level 3 Fair Value Assets and Liabilities on a Recurring Basis The following table presents additional information about Level 3 Loans Held for Sale, Borrower Loans, and Notes measured at fair value on a recurring basis for the year ended December 31, 2022 and 2021 (in thousands): Fair Value Measurements Using Significant Unobservable Inputs (Level 3) Assets Liabilities Borrower Loans Held Notes Total Fair value at January 1, 2021 $ 209,670 $ — $ (208,379) $ 1,291 Originations 232,000 1,712,705 (231,933) 1,712,772 Principal repayments (171,286) — 172,250 964 Borrower Loans sold to third parties (1,422) (1,712,705) — (1,714,127) Other changes (195) — 166 (29) Change in fair value (1,141) — 1,911 770 Fair value at December 31, 2021 $ 267,626 $ — $ (265,985) $ 1,641 Originations 284,921 3,063,729 (285,115) 3,063,535 Principal repayments (187,599) — 202,308 14,709 Borrower Loans sold to third parties (14,520) (3,063,729) — (3,078,249) Other changes 650 — (742) (92) Change in fair value (30,436) — 30,830 394 Fair value at December 31, 2022 $ 320,642 $ — $ (318,704) $ 1,938 The following table presents additional information about Level 3 Servicing Assets recorded at fair value (in thousands): Servicing Assets Fair value at January 1, 2021 $ 11,088 Additions 9,020 Change in fair value (10,312) Fair value at December 31, 2021 $ 9,796 Additions 15,277 Change in fair value (10,213) Fair value at December 31, 2022 $ 14,860 Loan Trailing Fee Liability The fair value of the Loan Trailing Fee Liability represents the present value of the expected monthly Loan Trailing Fee payments, which takes into consideration certain assumptions related to expected prepayment rates and default rates using a discounted cash flow model. The assumptions used are the same as those used for the valuation of Servicing Assets, as described below. The following tables present additional information about Level 3 Loan Trailing Fee Liability measured at fair value on a recurring basis (in thousands): Loan Trailing Fee Liability Fair Value at January 1, 2021 $ 2,233 Issuances 1,775 Cash payment of Loan Trailing Fee (2,100) Change in fair value 253 Fair Value at December 31, 2021 $ 2,161 Issuances 3,070 Cash payment of Loan Trailing Fee (2,245) Change in fair value 304 Fair Value at December 31, 2022 $ 3,290 Significant Recurring Level 3 Fair Value Asset and Liability Input Sensitivity Key economic assumptions are used to compute the fair value of Borrower Loans and Notes. The sensitivity of the current fair value to immediate changes in assumptions at December 31, 2022 and 2021 for Borrower Loans are presented in the following table (in thousands, except percentages): Borrower Loans: December 31, 2022 December 31, 2021 Fair value, using the following assumptions: $ 320,642 $ 267,626 Weighted-average discount rate 6.87 % 5.76 % Weighted-average default rate 11.36 % 10.70 % Fair value resulting from: 100 basis point increase in discount rate $ 317,380 $ 265,104 200 basis point increase in discount rate $ 314,201 $ 262,499 Fair value resulting from: 100 basis point decrease in discount rate $ 323,991 $ 270,520 200 basis point decrease in discount rate $ 327,429 $ 273,337 Fair value resulting from: Applying a 1.1 multiplier to default rate $ 316,832 $ 265,435 Applying a 1.2 multiplier to default rate $ 313,053 $ 263,107 Fair value resulting from: Applying a 0.9 multiplier to default rate $ 324,484 $ 270,133 Applying a 0.8 multiplier to default rate $ 328,361 $ 272,505 Key economic assumptions are used to compute the fair value of Notes. The sensitivity of the fair value to immediate changes in assumptions at December 31, 2022 and 2021 for Notes funded through the Note Channel are presented in the following table (in thousands, except percentages): Notes: December 31, 2022 December 31, 2021 Fair value, using the following assumptions: $ 318,704 $ 265,985 Weighted-average discount rate 6.87 % 5.76 % Weighted-average default rate 11.36 % 10.70 % Fair value resulting from: 100 basis point increase in discount rate $ 315,456 $ 263,326 200 basis point increase in discount rate $ 312,291 $ 260,735 Fair value resulting from: 100 basis point decrease in discount rate $ 322,037 $ 268,714 200 basis point decrease in discount rate $ 325,461 $ 271,516 Fair value resulting from: Applying a 1.1 multiplier to default rate $ 314,892 $ 263,644 Applying a 1.2 multiplier to default rate $ 311,112 $ 261,318 Fair value resulting from: Applying a 0.9 multiplier to default rate $ 322,547 $ 268,340 Applying a 0.8 multiplier to default rate $ 326,425 $ 270,711 Key economic assumptions are used to compute the fair value of Servicing Assets. The sensitivity of the current fair value to immediate changes in assumptions at December 31, 2022 and 2021 for Servicing Assets are presented in the following table (in thousands, except percentages): Servicing Assets: December 31, 2022 December 31, 2021 Fair value, using the following assumptions: $ 14,860 $ 9,796 Weighted-average market servicing rate 0.649 % 0.650 % Weighted-average prepayment rate 18.77 % 20.82 % Weighted-average default rate 12.63 % 12.24 % Fair value resulting from: Market servicing rate increase of 0.025% $ 13,850 $ 9,171 Market servicing rate decrease of 0.025% $ 15,870 $ 10,421 Fair value resulting from: Applying a 1.1 multiplier to prepayment rate $ 14,534 $ 9,580 Applying a 0.9 multiplier to prepayment rate $ 15,191 $ 10,015 Fair value resulting from: Applying a 1.1 multiplier to default rate $ 14,557 $ 9,667 Applying a 0.9 multiplier to default rate $ 15,165 $ 9,926 These sensitivities are hypothetical and should be evaluated with care. The effect on fair value of a 10% variation in assumptions generally cannot be determined because the relationship of the change in assumptions to the fair value may not be linear. Additionally, the impact of a variation in a particular assumption on the fair value is calculated while holding other assumptions constant. In reality, changes in one factor may lead to changes in other factors, which could impact the above hypothetical effects.

GOODWILL AND OTHER INTANGIBLE A

GOODWILL AND OTHER INTANGIBLE ASSETS, NET	12 Months Ended
	Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
GOODWILL AND OTHER INTANGIBLE ASSETS, NET	GOODWILL AND OTHER INTANGIBLE ASSETS, NET Goodwill Prosper’s goodwi ll balance of $36.4 million at December 31, 2022 did not change during the year ended December 31, 2022. The Company recorded no goo dwill impairment for the years ended December 31, 2022, 2021 and 2020. Other Intangible Assets, Net The following table presents the detail of other Intangible Assets subject to amortization as of the following dates (dollars in thousands): December 31, 2022 Gross Carrying Value Accumulated Amortization Net Carrying Value Remaining Useful Life (In Years) Developed technology $ 3,060 $ (3,060) $ — — User base and customer relationships 5,050 (4,858) 192 2.3 Brand name 60 (60) — — Total Intangible Assets subject to amortization $ 8,170 $ (7,978) $ 192 December 31, 2021 Gross Carrying Value Accumulated Amortization Net Carrying Value Remaining Useful Life (In Years) Developed technology $ 3,060 $ (3,060) $ — — User base and customer relationships 5,050 (4,722) 328 3.3 Brand name 60 (60) — — Total Intangible Assets subject to amortization $ 8,170 $ (7,842) $ 328 The Company recorded no additional intangibles for the years ended December 31, 2022 and 2021. For the years ended December 31, 2022, 2021 and 2020, the Company reco rded no intangible asset impairment. Prosper’s intangible asset balance w as $0.2 million and $0.3 million at December 31, 2022 and 2021, respectively. The user base and customer relationships intangible assets are being amortized on an accelerated basis over a three Amortization expense for the years ended December 31, 2022, 2021 and 2020 was $0.1 million , $0.2 million and $0.2 million, respectively. Estimated amortization of purchased Intangible Assets for future periods is as follows (in thousands): Amounts Years Ending December 31, 2023 $ 107 2024 85 Total Amortization Expenses $ 192

OTHER LIABILITIES

OTHER LIABILITIES	12 Months Ended
	Dec. 31, 2022
Other Liabilities [Abstract]
OTHER LIABILITIES	OTHER LIABILITIES Other Liabilities consists of the following (in thousands): December 31, 2022 2021 Operating lease liabilities (Note 15) $ 16,351 $ 11,026 Deferred revenue 3,880 1,196 Credit Card servicing obligation liability (Note 5) 3,720 — Loan trailing fee liability 3,290 2,161 Deferred income tax liability 658 560 Financing lease liabilities — 78 Paycheck Protection Program loan (Note 10) — 8,590 Other 359 289 Total Other Liabilities $ 28,258 $ 23,900

DEBT

DEBT	12 Months Ended
	Dec. 31, 2022
Debt Disclosure [Abstract]
DEBT	DEBT Term Loan Credit Agreement On November 14, 2022, the Company entered into a Credit Agreement with a third-party financial institution, which provides for a $75 million Term Loan maturing on November 14, 2026. Proceeds received from the Term Loan were net of an original issue discount and the Company also incurred approximately $0.4 million in debt issuance costs. Both the original issue discount and the debt issuance costs are being amortized over the life of the Term Loan to interest expense using the effective interest method. Interest Borrowings under the Term Loan accrue interest at the Secured Overnight Financing Rate (“SOFR”) plus 9.0% per annum. In addition, all borrowings under the Term Loan accrue payment-in-kind (“PIK”) interest at 2.0% per annum. Any accrued PIK interest that remains unpaid at the end of each month is added to the outstanding principal balance of the Term Loan. Guarantees and Collateral PMI’s obligations under the Term Loan are guaranteed by PHL and BillGuard. All obligations under the Credit Agreement are secured by a first priority, perfected lien on substantially all of the assets of PMI (subject to exclusions such as certain cash amounts and deposit accounts), PHL and BillGuard, as well as equity interests in all of PMI’s subsidiaries with the exception of PGT. Covenants and Other Matters The Credit Agreement contains a number of covenants that, among other things and subject to certain exceptions and thresholds, restrict PMI’s ability to incur certain new indebtedness; incur certain liens; sell or otherwise dispose of all or substantially all its assets; make loans, advances, and guarantees; and pay dividends or make other distributions on equity interests. In addition, the Credit Agreement contains certain financial covenants with which the Company must remain in compliance as of the last business day of each month during the life of the Term Loan: • a minimum tangible net worth • a minimum net liquidity • a maximum leverage ratio • a minimum asset coverage ratio The Company is in compliance with all covenants as of December 31, 2022, as well as applicable monthly periods for the year then ended. The Credit Agreement also contains certain customary representations and warranties and affirmative covenants, and certain reporting obligations. In addition, the Term Loan lender will be permitted to accelerate all outstanding borrowings and exercise other specified remedies upon the occurrence of certain events of default (subject to certain grace periods and exceptions), which include, among other things, payment defaults, breaches of representations and warranties, covenant defaults, certain cross-defaults to other indebtedness, certain events of bankruptcy and insolvency, certain judgments and changes of control. Prosper Warehouse Trust Agreements Prosper’s consolidated VIEs, PWIT and PWIIT (together, “Warehouse VIEs”), each entered into an agreement (together, “Warehouse Agreements”) with certain lenders for committed revolving lines of credit (“Warehouse Lines”) during 2018 and 2019, respectively. In connection with the Warehouse Agreements, the Warehouse VIEs each entered into a security agreement with a bank as administrative agent and a national banking association as collateral trustee and paying agent. Proceeds under the Warehouse Lines may only be used to purchase certain unsecured consumer loans and related rights and documents from Prosper and to pay fees and expenses related to the Warehouse Lines. Both Warehouse VIEs are consolidated because Prosper is the primary beneficiary of the VIEs. The assets of the VIEs can be used only to settle obligations of the VIEs. Additionally, the creditors of the Warehouse Lines have no recourse to the general credit of Prosper. The loans held in the Warehouse VIEs are included in Loans Held for Sale, at Fair Value and Warehouse Lines are in Warehouse Lines in the consolidated balance sheets. Both Warehouse Agreements contain the same certain covenants including restrictions on each Warehouse VIE's ability to incur indebtedness, pledge assets, merge or consolidate and enter into certain affiliate transactions. Each Warehouse Agreement also requires Prosper to maintain a minimum tangible net worth of $25 million, minimum net liquidity of $15 million and a maximum leverage ratio of 5:1. Tangible net worth is defined as the sum of (i) (A) Convertible Preferred Stock, (B) total Stockholders’ Deficit and (C) Convertible Preferred Stock Warrant Liability, less the sum of (ii) (A) goodwill and (B) intangible assets. Net liquidity is defined as the sum of cash, cash equivalents and Available for Sale Investments. The leverage ratio is defined as the ratio of total consolidated indebtedness other than non-recourse securitization indebtedness, non-recourse or limited recourse warehouse indebtedness and borrower dependent notes, to tangible net worth. As of December 31, 2022, Prosper was in compliance with the covenants under each Warehouse Agreement. PWIT Warehouse Line On January 19, 2018, through PWIT, Prosper entered into a Warehouse Agreement for a Warehouse Line. Effective June 12, 2018, the Warehouse Agreement was amended. The amendments included increasing the committed line of credit from $100 million to $200 million, extending the term of the PWIT Warehouse Line (including the final maturity date), amending the monthly unused commitment fee and reducing the rate at which the PWIT Warehouse Line bears interest. Subsequently the Warehouse Agreement was amended on June 20, 2019 to extend the facility, to reduce the interest rate and unused commitment fee and to expand the eligibility criteria for unsecured consumer loans that can be financed through the PWIT Warehouse Line. It was amended again on May 19, 2021 to extend the facility, to reduce the interest and advance rates and to include provisions for an alternative benchmark rate in light of the ongoing phaseout of LIBOR. Under the amended agreement, proceeds of loans made under the PWIT Warehouse Line may be borrowed, repaid and reborrowed until the earlier of June 20, 2023 or the occurrence of any accelerated amortization event or event of default. Repayment of any outstanding proceeds will be made over the 24 month period ending June 20, 2025, excluding the occurrence of any accelerated amortization event or event of default. Under the amended agreement, the PWIT Warehouse Line bears interest at a rate of an established benchmark rate (currently LIBOR) plus 2.75% and has an advance rate of 87% for the majority of collateral loans, with lower advance rates for certain collateral loans. Additionally, the PWIT Warehouse Line bears a monthly unused commitment fee of 0.50% per annum on the undrawn portion available under the PWIT Warehouse Line. As of December 31, 2022, Prosper had $201.2 million in debt and accrued interest outstanding under the PWIT Warehouse Line. This debt is secured by an aggregate outstanding principal balance of $232.0 million included in Loans Held for Sale, at Fair Value on the Consolidated Balance Sheets. As of December 31, 2022 the Warehouse Line funds were drawn to the available limit. Prosper incurred $2.2 million of deferred debt issuance costs associated with the PWIT Warehouse Line, including $0.3 million from the amendment signed on May 19, 2021, which are included in “Prepaids and Other Assets” and amortized to interest expense over the term of the revolving arrangement. Prosper purchased a swaption to limit the Company's exposure to increases in LIBOR. The swaption is recorded on the consolidated balance sheet at fair value in Prepaids and Other Assets. Any changes in the fair value are recorded in the Change in Fair Value of Financial Instruments on the Consolidated Statement of Operations. The fair value of the swaption was $1.3 million at December 31, 2022, and the change in fair value was $0.8 million for the year ended December 31, 2022. PWIIT Warehouse Line On March 28, 2019, through PWIIT, Prosper entered into a second Warehouse Agreement for a $300 million Warehouse Line with a national banking association different than that of PWIT. On March 4, 2021, PMI extended its $300 million PWIIT Warehouse Line (“PWIIT Extension”). The PWIIT Extension consists of a $230 million Class A loan with the existing PWIIT Warehouse Line national banking association and a $70 million Class B loan with an asset manager. The advance rate on the PWIIT Extension is 90%. Under the PWIIT Extension, proceeds of loans made under the PWIIT Warehouse Line may be borrowed, repaid and reborrowed until the earlier of March 3, 2023 or the occurrence of any accelerated amortization event or event of default. Repayment of any outstanding proceeds will be made over a 24-month period ending March 4, 2025, excluding the occurrence of any accelerated amortization event or event of default. Under the PWIIT Extension, the Class A loan bears interest at a rate of the national banking association's asset-backed commercial paper rate, plus a spread of 2.05%. The spread increases by 0.375% during the first 12 months immediately following the termination of the revolving period with an additional increase of 0.375% one year later. Additionally, the Class A loan bears a monthly unused commitment fee of 0.50% per annum on the undrawn portion available under the Class A loan. The Class B loan bears interest at a rate of one-month LIBOR, plus a spread of 8.75%. The spread increases by 0.375% during the first twelve months immediately following the termination of the revolving period with an additional increase of 0.375% one year later. Additionally, the Class B loan bears a monthly unused commitment fee of 0.50% or 1.00% per annum on the undrawn portion available under the Class B loan, depending on the Class B loan utilization percentage. As of December 31, 2022, Prosper had $245.6 million in debt and accrued interest outstanding under the PWIIT Warehouse Line. This debt is secured by an aggregate outstanding principal balance of $276.3 million included in Loans Held for Sale, at Fair Value on the Consolidated Balance Sheets. At December 31, 2022 the undrawn portion available under the PWIIT Warehouse Line was $55.3 million. PMI incurred $1.3 million of debt issuance costs for the extension in March 2021, which are included in “Prepaids and Other Assets” and will be amortized to interest expense over the term of the revolving arrangement. Phaseout of LIBOR A portion of the interest rate charged on our PWIT Warehouse Line is currently based on LIBOR. LIBOR has been the subject of reform and was expected to phase out by the end of fiscal 2021; however, on March 5, 2021, the ICE Benchmark Administration Limited (“ICE”) delayed the phase out of LIBOR to June 30, 2023. The consequences of the discontinuation of LIBOR cannot be entirely predicted but could impact the interest expense incurred on these debt instruments. We have negotiated alternatives to LIBOR on the PWIT Warehouse Line, which we may renegotiate before LIBOR ceases to be a widely available reference rate. Paycheck Protection Program Loan In April 2020, the Company obtained an $8.4 million loan under the PPP, established by the Coronavirus Aid, Relief, and Economic Security Act (“CARES Act”) and sponsored by the U.S. Small Business Administration (“SBA”). The loan accrued interest at one percent per annum and had a two-year term through April 2022, with payments deferred until such time as an approval or denial of forgiveness was received from the SBA. The Company used the PPP Loan proceeds to cover payroll costs, rent and utilities in accordance with the relevant terms and conditions of the CARES Act. On March 21, 2022, the Company was notified by the SBA that all principal and interest under the loan, totaling $8.6 million, was forgiven in full through a forgiveness payment made on March 15, 2022 by the SBA to the lender of the PPP loan. As a result, the Company recognized a “Gain on Forgiveness of PPP Loan” for this amount on its accompanying Consolidated Statement of Operations for the year ended December 31, 2022.

NET INCOME (LOSS) PER SHARE

NET INCOME (LOSS) PER SHARE	12 Months Ended
	Dec. 31, 2022
Earnings Per Share [Abstract]
NET INCOME (LOSS) PER SHARE	NET INCOME (LOSS) PER SHARE PMI computes its net income (loss) per share in accordance with ASC Topic 260, Earnings Per Share (“ASC Topic 260”). Under ASC Topic 260, basic net income (loss) per share is computed by dividing net income (loss) available to common stockholders by the weighted average number of common shares outstanding for the period and excludes the effects of any potentially dilutive securities. PMI’s net income (loss) per share is calculated using the two-class method in accordance with ASC Topic 260. The two-class method allocates earnings that otherwise would have been available to common shareholders to holders of participating securities. Management considers all series of our Convertible Preferred Stock to be participating securities due to their rights to participate in dividends with Common Stock. As such, earnings allocated to these participating securities, which include participation rights in undistributed earnings, are subtracted from net income to determine total undistributed earnings to be allocated to common stockholders. All participating securities are excluded from basic weighted-average common shares outstanding. Prior to any conversion to common shares, each series of Prosper’s Convertible Preferred Stock is entitled to participate on an if-converted basis in distributions of earnings, when and if declared by the board of directors, that are made to common stockholders and consequently, these shares were considered participating securities. During the year ended December 31, 2022, 2021 and 2020, certain shares issued as a result of the early exercise of stock options which are subject to a repurchase right by PMI were entitled to receive non-forfeitable dividends during the vesting period and consequently, are considered participating securities. The weighted average shares used in calculating basic and diluted net income (loss) per share excludes certain shares that are disclosed as outstanding shares in the Consolidated Balance Sheets because such shares are restricted as they were associated with options that were early exercised and continue to remain unvested. Basic and diluted net income (loss) per share were calculated as follows for the periods presented (in thousands, except share and per share amounts): December 31, 2022 2021 2020 Numerator: Net Income (Loss) $ 70,582 $ (138,341) $ 18,551 Plus: Return on Share Purchase — — 2,381 Less: Net Income Allocated to Participating Securities (47,350) — (15,172) Net Income (Loss) Attributable to Common Stockholders $ 23,232 $ (138,341) $ 5,760 Denominator: Weighted average shares used in computing basic and diluted Net Income (Loss) Per Share 73,291,714 70,767,275 68,592,557 Effect of dilutive securities: Stock options 61,466,722 — 24,816,184 Warrants 570,313 — — Convertible preferred stock warrants 213,264,845 — 213,264,845 Weighted average shares used in computing diluted net income (loss) per share - diluted 348,593,594 70,767,275 306,673,586 Net Income (Loss) Per Share – Basic $ 0.32 $ (1.95) $ 0.08 Net Income (Loss) Per Share – Diluted $ 0.07 $ (1.95) $ 0.02 The following common stock equivalents were excluded from the computation of diluted net income (loss) per share for the periods presented because including them would have been anti-dilutive (number of shares): December 31, 2022 2021 2020 Excluded Securities: Convertible Preferred Stock issued and outstanding 158,365,655 158,365,655 158,365,655 Stock options issued and outstanding 17,703,550 72,756,708 48,265,056 Warrants issued and outstanding 510,036 1,080,349 1,080,349 Series E-1 Convertible Preferred Stock warrants — 35,544,141 — Series F Convertible Preferred Stock warrants — 177,720,704 — Total Excluded Securities 176,579,241 445,467,557 207,711,060

CONVERTIBLE PREFERRED STOCK, CO

CONVERTIBLE PREFERRED STOCK, CONVERTIBLE PREFERRED STOCK WARRANT LIABILITY AND COMMON STOCK	12 Months Ended
	Dec. 31, 2022
Stockholders' Equity Note [Abstract]
CONVERTIBLE PREFERRED STOCK, CONVERTIBLE PREFERRED STOCK WARRANT LIABILITY AND COMMON STOCK	CONVERTIBLE PREFERRED STOCK, CONVERTIBLE PREFERRED STOCK WARRANT LIABILITY AND COMMON STOCK Convertible Preferred Stock Under PMI’s amended and restated certificate of incorporation, preferred stock is issuable in series and the Board of Directors is authorized to determine the rights, preferences, and terms of each series. In January 2013, PMI issued and sold 69,340,760 shares of Series A Convertible Preferred Stock in a private placement at a purchase price of $0.29 per share for $19.8 million, net of issuance costs. In connection with that sale, PMI issued 25,585,910 shares at par value $0.01 per share of Series A-1 Convertible Preferred Stock to the holders of shares of PMI’s Convertible Preferred Stock that was outstanding immediately prior to the sale (“Old Preferred Shares”) in consideration for such stockholders participating in the sale. In connection with the Series A sale, Old Preferred Shares were converted into shares of Common Stock at a ratio of 1:1 if the holder of the Old Preferred Shares participated in the Series A sale or at a 10:1 ratio if the holder of the Old Preferred Shares did not so participate. In addition, each such participating holder received a share of Series A-1 Convertible Preferred Stock for every dollar of liquidation preference associated with an Old Preferred Share held by such holder. Each share of Series A-1 preferred stock has a liquidation preference of $2.00 and converts into Common Stock at a ratio of 1,000,000:1. The Series A and Series A-1 Convertible Preferred Stock were sold in reliance on the exemption from the registration requirements of the Securities Act set forth in Section 4(2) of the Securities Act and Regulation D promulgated thereunder regarding sales by an issuer not involving a public offering. In September 2013, PMI issued and sold 41,443,670 shares of Series B Convertible Preferred Stock in a private placement at a purchase price of $0.60 per share for approximately $24.9 million, net of issuance costs. The Series B Convertible Preferred Stock was sold in reliance on the exemption from the registration requirements of the Securities Act set forth in Section 4(2) of the Securities Act and Regulation D promulgated thereunder regarding sales by an issuer not involving a public offering. In May 2014, PMI issued and sold 24,404,770 shares of Series C Convertible Preferred Stock in a private placement at a purchase price of $2.87 per share for approximately $69.9 million, net of issuance costs. The Series C Convertible Preferred Stock was sold in reliance on the exemption from the registration requirements of the Securities Act set forth in Section 4(2) of the Securities Act and Regulation D promulgated thereunder regarding sales by an issuer not involving a public offering. The purpose of the Series C private placement was to raise funds for general corporate needs and for the tender offer discussed below. On June 18, 2014, PMI issued a Tender Offer Statement to purchase up to 6,963,785 shares, in the aggregate, of its Series A Convertible Preferred Stock and Series B Convertible Preferred Stock at a price equal to $2.87 per share. Upon closure of the tender offer on July 16, 2014, 782,540 shares of Series A Convertible Preferred Stock and 5,667,790 shares of Series B Convertible Preferred Stock were purchased for an aggregate price of $18.5 million. In April 2015, PMI issued and sold 23,888,640 shares of Series D Convertible Preferred Stock in a private placement at a purchase price of $6.91 per share for proceeds of approximately $164.8 million, net of issuance costs. The Series D Convertible Preferred Stock was sold in reliance on the exemption from the registration requirements of the Securities Act set forth in Section 4(2) of the Securities Act and Regulation D promulgated thereunder regarding sales by an issuer not involving a public offering. The purpose of the Series D private placement was to raise funds for general corporate needs and for the share repurchase discussed below. In December 2016, PMI authorized 40,000,000 shares of Series E Convertible Preferred Stock. These shares are reserved for the Convertible Preferred Stock warrants that were also issued in December 2016 On December 16, 2016, PMI issued a warrant to purchase 20,267,135 shares of Series E-1 Convertible Preferred Stock of PMI at an exercise price of $0.01 per share (the “First Series E-1 Warrant”) to Pinecone Investments LLC (“Pinecone”), an affiliate of Colchis Capital Management, L.P. (“Colchis”). On February 27, 2017, PMI issued to Pinecone Investments LLC a second warrant (the “Second Series E-1 Warrant,” and together with the First Series E-1 Warrant, the “Series E-1 Warrants”) to purchase 15,277,006 shares of Series E-1 Convertible Preferred Stock at an exercise price of $0.01 per share. The Series E-1 Warrants are immediately exercisable, in whole or in part, by paying in cash the full purchase price payable in respect of the number of shares purchased. The Series E-1 Warrants were issued pursuant to the Warrant Agreement dated December 16, 2016 between PMI and Colchis, as previously described in PMI’s Current Report on Form 8-K as filed with the SEC on December 22, 2016. In connection with the Consortium Purchase Agreement entered into with affiliates of the Consortium ( “Warrant Holders”) a warrant agreement was signed (the “Series F Warrant Agreement”). Pursuant to the Series F Warrant Agreement, PMI issued to the Consortium three warrants (together, the “Series F Warrant”) to purchase up to an aggregate 177,720,706 shares of PMI’s Series F Convertible Preferred Stock at an exercise price of $0.01 per share (the “Series F Warrant Shares”). The Warrant Holders' right to exercise the Series F Warrant was subject to monthly vesting during the term of the Consortium Purchase Agreement based upon the volume of loans the Consortium elected to purchase (if any) in each month, subject to certain cure rights such as offering additional loans for sale in subsequent periods. Under the terms of the Series F Warrant Agreement, the Series F Warrant Shares may also vest in full upon a change of control of PMI, insolvency of PMI or PFL, certain breaches of contract by PMI or PFL that are not cured within a defined cure period and upon the occurrence of certain events set forth in the Warrant Agreement. The Series F Warrant will be exercisable with respect to vested Series F Warrant Shares, in whole or in part, at any time prior to the tenth anniversary of its date of issuance. The number of shares underlying the Series F Warrant may be adjusted following certain events such as stock splits, dividends, reclassifications and certain other issuances by PMI. On September 20, 2017, Prosper issued and sold 37,249,497 shares of Series G Convertible Preferred Stock in a private placement at a purchase price of $1.34 per share for proceeds of approximately $47.9 million, net of issuance costs. The Series G Convertible Preferred Stock was sold in reliance on the exemption from the registration requirements of the Securities Act set forth in Section 4(a)(2) of the Securities Act regarding sales by an issuer not involving a public offering. The purpose of the Series G private placement was to raise funds for general corporate purposes. On December 23, 2019, Prosper entered into a Stock Repurchase Agreement with an investor to repurchase 7,221,020 shares, in the aggregate, of Series A, Series A-1, and Series B Convertible Preferred Stock and Common Stock for nominal consideration. Upon execution of the Agreement, 2,130,035 shares of Series A Convertible Preferred Stock, 2,245,600 shares of Series A-1 Convertible Preferred Stock, 648,720 shares of Series B Convertible Preferred Stock and 2,196,665 shares of Common Stock were repurchased. Upon repurchase of Convertible Preferred Stock, the difference between repurchase price and the carrying amount of the Convertible Preferred Stock was recognized in Additional Paid-In Capital. Additionally, the difference between the repurchase price and par value of the Common Stock was recorded through Additional Paid-In Capital. Prosper Grantor Trust On July 13, 2020, the Company established Prosper Grantor Trust (“PGT”), a revocable grantor trust administered by an independent trustee, with the intention of contributing assets to PGT for the benefit of PMI employees in the event of a change in control through an Eligible Employee Retention Plan. PGT was determined to be a VIE and PMI was determined to be its primary beneficiary due to the fact that the Company, through its role as the grantor, has both (a) the power to direct the activities that most significantly affect the VIE’s economic performance, including its funding decisions and investment strategy, and (b) the obligation to absorb losses that could be potentially significant to the economic performance of the VIE by virtue of the Company’s requirement to fund PGT in the event that it is unable to meet its obligations to PMI’s employees. PMI also maintains a contingent call liability on PGT’s assets in the event of a bankruptcy. As a result, PGT is fully consolidated into PMI’s consolidated financial statements. On July 21, 2020, PGT entered into a Stock Transfer Agreement with a PMI investor to purchase 34,670,420 shares of Series A Convertible Preferred Stock and 16,577,495 shares of Series B Convertible Preferred Stock for nominal consideration. Upon execution of the Stock Transfer Agreement, these shares were purchased by a consolidated VIE of the Company, and thus the difference between the fair value of the repurchased stock and the purchase price is included in Convertible Preferred Stock Held by Consolidated VIE on PMI’s accompanying consolidated balance sheet as of December 31, 2022. These shares remain outstanding for legal purposes and retain their voting rights, but are excluded from the earnings per share calculation. The number of authorized, issued and outstanding shares, their par value and liquidation preference for each series of Convertible Preferred Stock as of December 31, 2022 are disclosed in the table below (amounts in thousands, except share and par value amounts): Par Value Authorized Shares Outstanding and Issued Shares Liquidation Preference, Outstanding Shares Series A $ 0.01 68,558,220 66,428,185 * $ 19,160 Series A-1 $ 0.01 24,760,915 22,515,315 45,031 Series B $ 0.01 35,775,880 35,127,160 * 21,190 Series C $ 0.01 24,404,770 24,404,770 70,075 Series D $ 0.01 23,888,640 23,888,640 165,000 Series E-1 $ 0.01 35,544,141 — — Series E-2 $ 0.01 16,858,078 — — Series F $ 0.01 177,720,707 3 — Series G $ 0.01 37,249,497 37,249,497 50,000 Total 444,760,848 209,613,570 $ 370,456 * Series A and Series B Convertible Preferred Stock totals are inclusive of 34,670,420 and 16,577,495 shares, respectively, held by PGT, a consolidated VIE. Dividends Dividends on shares of the Series A, Series B, Series C, Series D, Series E-1, Series E-2, Series F, and Series G Convertible Preferred Stock are payable only when, as, and if declared by the Board of Directors. No dividends will be paid with respect to the Common Stock until any declared dividends on the Convertible Preferred Stock have been paid or set aside for payment to the preferred stockholders. After payment of any such dividends, any additional dividends or distributions will be distributed among all holders of Common Stock and preferred stock in proportion to the number of shares of Common Stock that would be held by each such holder if all shares of preferred stock were converted to Common Stock at the then effective conversion rate. The Series A-1 convertible preferred shares have no dividend rights. To date, no dividends have been declared on any of PMI’s preferred stock or Common Stock. Conversion Under the terms of PMI’s amended and restated certificate of incorporation, the holders of preferred stock have the right to convert such preferred stock into Common Stock at any time. In addition, all preferred stock automatically converts into Common Stock (x) immediately prior to the closing of an initial public offering that values Prosper at least at $2 billion and that results in aggregate proceeds to Prosper of at least $100 million or (y) upon a written request from the holders of at least 60% of the voting power of the outstanding preferred stock (on an as-converted basis, provided that: (i) the Series A-1 Convertible Preferred Stock shall not be converted without at least 14% of the voting power of the outstanding Series A-1 Convertible Preferred Stock; (ii) the Series D shall not be converted without at least 60% of the voting power of the outstanding Series D; (iii) the Series E-1 and Series E-2 shall not be converted without at least 60% of the voting power of the outstanding Series E-1 and Series E-2, voting together as a single class; (iv) the Series F shall not be converted without at least 60% of the voting power of the outstanding Series F, and (v) the shares of Series G Preferred Stock will not be automatically converted unless the holders of at least 60% of the outstanding shares of Series G Preferred Stock approve such conversion). In addition, if a holder of the Series A Convertible Preferred Stock has converted any of the Series A Convertible Preferred Stock, then all of such holder’s shares of Series A-1 Convertible Preferred Stock also will be converted upon a liquidation event (as defined under the certificate of incorporation). In lieu of any fractional shares of Common Stock to which a holder would otherwise be entitled, PMI shall pay such holder cash in an amount equal to the fair market value of such fractional shares, as determined by its Board of Directors. At present, each of the Series A, Series B, Series C, Series D, Series E-1, Series E-2, and Series F Convertible Preferred Stock converts into PMI Common Stock at a 1:1 ratio. The Series A-1 Convertible Preferred Stock converts into Common Stock at a 1,000,000:1 ratio and the Series G Convertible Preferred Stock converts into Common Stock at a 1:1.36 ratio. The Series G Convertible Preferred Stock conversion ratio reflects the Series G true-up that occurred at end of the vesting period for the Series E-2 and Series F Preferred Stock warrants. For the Series G true-up, the conversion price of the Series G Convertible Preferred Stock was reduced to a number equal to the Series G Preferred Stock original issuance price, divided by the quotient obtained by dividing the Series G true-up amount by the total number of Series G Preferred Stock issued as of the Series G closing date. The Series G true-up amount means the aggregate number of shares of Series G Preferred Stock that would have been issued to the purchasers of the Series G Preferred Stock on the Series G closing date, if warrants to purchase shares of Series E-2 Preferred Stock or Series F Preferred Stock that were exercisable or exercised as of the true-up time (end of vesting period) had been exercisable or exercised as of such Series G closing date. Liquidation Rights PMI’s Convertible Preferred Stock has been classified as temporary equity on the consolidated balance sheet. The preferred stock is not redeemable; however, in the event of a voluntary or involuntary liquidation, dissolution, change in control or winding up of PMI, holders of the Convertible Preferred Stock may have the right to receive its liquidation preference under the terms of PMI’s certificate of incorporation. Each holder of Series E-1, Series E-2 and Series F Convertible Preferred Stock is entitled to receive prior and in preference to any distribution of proceeds from a liquidation event (as defined under the certificate of incorporation) to the holders of Series A, Series B, Series C, Series D, Series G and Series A-1 Convertible Preferred Stock or Common Stock, an amount per share for (i) each share of Series E-1 Convertible Preferred Stock equal to the sum of the liquidation preference specified for such share and all declared but unpaid dividends, if any, on such share, (ii) each share of Series E-2 Convertible Preferred Stock equal to the sum of two-thirds the liquidation preference specified for such share and all declared but unpaid dividends, if any, on such share, and (iii) each share of Series F Convertible Preferred Stock equal to the sum of two-thirds of the liquidation preference specified for such share and all declared but unpaid dividends, if any, on such share. After the payment or setting aside for payment to the holders of Series E-1, Series E-2, and Series F Convertible Preferred Stock each holder of Series A, Series B, Series C and Series D, Series E-2, Series F and Series G Convertible Preferred Stock is entitled to receive, on a pari passu basis, prior to and in preference to any distribution of proceeds from a liquidation event (as defined under the certificate of incorporation) to the holders of Series A-1 Convertible Preferred Stock or Common Stock, (i) an amount per share for each share of Series E-2 and Series F Convertible Preferred Stock equal to the sum of one-third of the liquidation preference specified for such share and all declared but unpaid dividends, if any, on such share, and (ii) an amount per share for each share of Series A, Series B, Series C, Series D and Series G Convertible Preferred Stock equal to the sum of the liquidation preference specified for such share and all declared but unpaid dividends, if any, on such share. After the payment or setting aside for payment to the holders of Series A, Series B, Series C, Series D, Series E-1, Series E-2, Series F and Series G Convertible Preferred Stock, the holders of Series A-1 Convertible Preferred Stock are entitled to receive, prior and in preference to any distribution of proceeds to the holders of Common Stock, an amount per share for each such share of Series A-1 Convertible Preferred Stock equal to the sum of the liquidation preference specified for such share and all declared but unpaid dividends, if any, on such share. After the payment or setting aside for payment to the holders of Series A, Series B, Series C, Series D, Series E-1, Series E-2, Series F, Series G and Series A-1 Convertible Preferred Stock, the entire remaining proceeds legally available for distribution will be distributed pro-rata to the holders of Series A Convertible Preferred Stock and Common Stock in proportion to the number of shares of Common Stock held by them assuming the Series A Convertible Preferred Stock has been converted into shares of Common Stock at the then effective conversion rate, provided that the maximum aggregate amount per share of Series A Convertible Preferred Stock which the holders of Series A Convertible Preferred Stock shall be entitled to receive is three times the original issue price for the Series A Convertible Preferred Stock. At present, the liquidation preferences are equal to $0.29 per share for the Series A Convertible Preferred Stock, $2.00 per share for the Series A-1 Convertible Preferred Stock, $0.60 per share for the Series B Convertible Preferred Stock, $2.87 per share for the Series C Convertible Preferred Stock, $6.91 per share for the Series D Convertible Preferred Stock, $0.84 per share for the Series E-1 Convertible Preferred Stock, $0.84 per share for the Series E-2 Convertible Preferred Stock, $0.84 per share for the Series F Convertible Preferred Stock and $1.34 per share for the Series G Convertible Preferred Stock. Voting Each holder of shares of Convertible Preferred Stock is entitled to the number of votes equal to the number of shares of Common Stock into which such shares of Convertible Preferred Stock could be converted and each has voting rights and powers equal to the voting rights and powers of the Common Stock. The holders of Convertible Preferred Stock and the holders of Common Stock vote together as a single class (except with respect to certain matters that require separate votes or as required by law), and are entitled to notice of any stockholders’ meeting in accordance with the Bylaws of PMI. Convertible Preferred Stock Warrant Liability Series E-1 Warrants In connection with the Settlement and Release Agreement dated November 17, 2016 among PMI, its wholly owned subsidiary PFL and Colchis, on December 16, 2016, PMI issued the First Series E-1 Warrant. The Second Series E-1 Warrant for an additional 15,277,006 shares of Series E-1 Convertible Preferred Stock was granted on the signing of the Consortium Purchase Agreement on February 27, 2017. The warrants expire ten years from the date of issuance. Prosp er recognized $13.5 million of income a nd $21.3 million of expense from the re-measurement of the fair value of the warrants for the years ended December 31, 2022 and 2021, respectively. The income or expense resulted from remeasurement of the fair value of the warrants is recorded in Change in Fair Value of Convertible Preferred Stock Warrants To determine the fair value of the Series E-1 Warrants, the Company first determined the value of a share of a Series E-1 Convertible Preferred Stock. To determine the fair value of the Convertible Preferred Stock, the Company first derived the business enterprise value (“BEV”) of the Company using a variety of valuation methods, including discounted cash flow models and market based methods, as deemed appropriate under the circumstances applicable at the valuation date. Once the Company determined an estimated BEV, the option pricing method (“OPM”) was used to allocate the BEV to the various classes of our equity, including our preferred stock. The concluded per share value for the Series E-1 Convertible Preferred Stock was utilized as an input to the Black-Scholes option pricing model. The Company determined the fair value of the outstanding Series E-1 preferred stock warrants utilizing the following assumptions as of December 31, 2022 and 2021: December 31, 2022 2021 Volatility 72.0 % 63.0 % Risk-free interest rate 4.30 % 0.90 % Expected term (in years) 2.75 2.75 Dividend yield — % — % The above assumptions were determined as follows: Volatility: The volatility is derived from historical volatilities of several unrelated publicly listed peer companies over a period approximately equal to the term of the warrant as the Company has limited information on the volatility of its preferred stock since there is currently no trading history. When making the selections of industry peer companies to be used in the volatility calculation, the Company considered the size, operational, and economic similarities to the Company’s principal business operations. Risk-Free Interest Rate: The risk-free interest rate is based on the U.S. Treasury yield in effect as of December 31, 2022, and for zero coupon U.S. Treasury notes with maturities approximately equal to the term of the warrant. Expected Term: The expected term is the period of time for which the warrants are expected to be outstanding. Dividend Yield: The expected dividend assumption is based on the Company’s current expectations about the Company’s anticipated dividend policy. Series F Warrants In connection with the Consortium Purchase Agreement on February 27, 2017 , PMI issued warrants to purchase up to 177,720,706 shares of PMI's Series F Convertible Preferred Stock at $0.01 per share. The warrants expire ten years from the date of issuance. Prosper recognized $71.1 million of income a nd $117.3 million of expense from the re-measurement of the fair value of the warrants for the years ended December 31, 2022 and 2021, respectively. The income or expense resulting from changes in the fair value of the warrant is recorded through Change in Fair Value of Convertible Preferred Stock Warrants To determine the fair value of the Series F Warrants, the Company first determined the value of a share of a Series F Convertible Preferred Stock. To determine the fair value of the Convertible Preferred Stock, the Company first derived the BEV using valuation methods, including a combination of methods, as deemed appropriate under the circumstances applicable at the valuation date. Once the Company determined an estimated BEV, the OPM was used to allocate the BEV to the various classes of Prosper's equity, including our preferred stock. The concluded per share value for the Series F Convertible Preferred Stock warrants utilized the Black-Scholes option pricing model. The Company determined the fair value of the outstanding Series F Warrants utilizing the following assumptions as of December 31, 2022 and 2021: December 31, 2022 2021 Volatility 72.00 % 63.0 % Risk-free interest rate 4.30 % 0.90 % Expected term (in years) 2.75 2.75 Dividend yield — % — % The above assumptions were determined using the same criteria described above for the Series E-1 Warrants. The combined activity of the Convertible Preferred Stock Warrant Liability for the years ended December 31, 2022 and 2021 are presented in Note 7, Fair Value of Assets and Liabilities. Common Stock PMI, through its Amended and Restated Certificate of Incorporation, is the sole issuer of Common Stock and related options, RSUs and warrants. On February 16, 2016, PMI amended and restated its Certificate of Incorporation to, among other things, effect a 5-for-1 forward stock split. On September 20, 2017, PMI further amended its Amended and Restated Certificate of Incorporation to increase the number of shares of Common Stock authorized for issuance. The total number of shares of stock which PMI has the authority to issue is 1,069,760,848, consisting of 625,000,000 shares of Common Stock, $0.01 par value per share, and 444,760,848 shares of preferred stock, $0.01 par value per share. As described above, the Company repurchased 2,196,665 shares of Common Stock on December 23, 2019. As of December 31, 2022, 75,223,850 shares of Common Stock were issued and 74,287,915 shares of Common Stock were outstanding. As of December 31, 2021, 73,089,929 shares of Common Stock were issued and 72,153,994 shares of Common Stock were outstanding. Each holder of common stock is entitled to one vote for each share of common stock held. Common Stock Issued upon Exercise of Stock Options During the year ended December 31, 2022 and 2021, PMI issued 2,133,921 and 3,014,622 shares of Common Stock, respectively, upon the exercise of vested options for cash proceeds of $54 thousand and $61 thousand, respectively. Common Stock Issued upon Exercise of Warrants For the year ended December 31, 2022 and 2021

STOCK-BASED COMPENSATION

STOCK-BASED COMPENSATION	12 Months Ended
	Dec. 31, 2022
Share-Based Payment Arrangement [Abstract]
STOCK-BASED COMPENSATION	STOCK-BASED COMPENSATION PMI grants equity awards primarily through its Amended and Restated 2005 Stock Option Plan (the “2005 Plan”), which was approved as amended and restated by its stockholders on December 1, 2010; and its 2015 Equity Incentive Plan, which was approved by its stockholders on April 7, 2015 and subsequently amended by an Amendment No. 1, Amendment No. 2 and Amendment No. 3, which were approved by PMI's stockholders effective as of February 15, 2016, May 31, 2016, and September 5, 2018 respectively (as amended, the “2015 Plan”). In March 2015, the 2005 Plan expired, except that any awards granted under the 2005 Plan prior to its expiration remain in effect pursuant to their terms. As of December 31, 2022, under the 2015 Plan, options to purchase up to 94,721,992 shares of PMI's Common Stock are reserved and may be granted to employees, directors, and consultants by PMI’s Board of Directors and stockholders to promote the success of Prosper’s business. Options generally vest 25% one year from the vesting commencement date and 1/48t h per month thereafter or vest 50% two years from the vesting commencement date and 1/48 per month thereafter or vest 1/36th per month from the vesting commencement date. In no event are options exercisable more than ten years after the date of grant. Stock Option Repricings On May 3, 2016, March 17, 2017 and August 11, 2020, the Compensation Committee of the Board of Directors of PMI approved three separate stock option repricing programs (collectively, the “Repricings”) authorizing PMI’s officers to reprice certain outstanding stock options held by employees and directors that had exercise prices above the current fair market value of PMI’s common stock on those respective dates. PMI believes that the Repricings encourage the continued service of valued employees and directors and motivate such service providers to perform at high levels, both of which are critical to the Company’s continued success. PMI expects to incur additional stock based compensation charges as a result of the Repricings. The financial statement impact of the above Repricings was not material for the years ended December 31, 2022 and 2021, and $0.4 million for the year ended December 31, 2020. As of December 31, 2022, the unamortized Repricings expense (net of forfeitures) is not material. Stock Option Activity Stock option activity under the 2005 Plan and 2015 Plan is summarized for the year ended December 31, 2022 below: Options Issued and Outstanding Weighted- Average Exercise Price Weighted-Average Contractual Term (in years) Aggregate intrinsic value 1 (in thousands) Balance as of January 1, 2022 72,186,151 $ 0.07 6.72 $ 46,458 Options granted 17,713,281 $ 0.59 Options exercised (2,133,921) $ 0.03 Options forfeited (10,031,923) $ 0.49 Option expirations (5,825) $ 0.02 Balance as of December 31, 2022 77,727,763 $ 0.13 6.22 $ 19,450 Options vested and expected to vest as of December 31, 2022 70,664,163 $ 0.13 6.22 $ 18,733 Options vested and exercisable at December 31, 2022 55,063,268 $ 0.04 5.14 $ 17,149 1. Aggregate intrinsic value represents the excess of the fair value of our Common Stock as of December 31, 2022 over the exercise price of the outstanding in-the-money options. Additional information pertaining to PMI's Common Stock option activities is as follows: Year ended December 31, 2022 2021 2020 Weighted-average grant date fair value of options granted (per share) $ 0.37 $ 0.13 $ 0.04 Other Information Regarding Stock Options The fair value of options granted to employees is estimated on the grant date using the Black-Scholes option valuation model. This valuation model for stock based compensation expense requires PMI to make assumptions and judgments about the variables used in the calculation, including the fair value of PMI’s Common Stock, the expected term (the period of time that the options granted are expected to be outstanding), the volatility of PMI’s Common Stock, a risk-free interest rate, and expected dividends. Given the absence of a publicly traded market, the Company considered numerous objective and subjective factors to determine the fair value of PMI’s Common Stock at each grant date. These factors included, but were not limited to: (i) contemporaneous valuations of Common Stock performed by unrelated third-party specialists, (ii) the prices for PMI’s preferred stock sold to outside investors, (iii) the rights, preferences and privileges of PMI’s preferred stock relative to PMI’s Common Stock; (iv) the lack of marketability of PMI’s Common Stock, (v) developments in the business, (vi) secondary transactions of PMI’s common and preferred shares, and (vii) the likelihood of achieving a liquidity event, such as an initial public offering or a merger or acquisition of Prosper, given prevailing market conditions. As PMI’s stock is not publicly traded, volatility for stock options is based on an average of the historical volatilities of the Common Stock of several entities with characteristics similar to those of PMI. The expected term assumptions were determined based on the vesting terms, exercise terms and contractual lives of the options using the simplified method. The risk-free rate is based on the U.S. Treasury yield curve in effect at the time of grant for periods corresponding with the expected life of the option. PMI uses an expected dividend yield of zero as it does not anticipate paying any dividends in the foreseeable future. PMI also estimates forfeitures of unvested stock options. Expected forfeitures are based on the Company’s historical experience. To the extent actual forfeitures differ from the estimates, the difference will be recorded as a cumulative adjustment in the period estimates are revised. No compensation cost is recorded for options that do not vest. The fair value of PMI’s stock option awards granted during the years ended December 31, 2022, 2021 and 2020 was estimated at the date of grant using the Black-Scholes model with the following weighted average assumptions: December 31, 2022 2021 2020 Volatility of common stock 67.19 % 64.22 % 52.62 % Risk-free interest rate 2.95 % 1.02 % 0.51 % Expected life 6.0 years 6.0 years 6.0 years Dividend yield — % — % — % PMI did not grant any performance-based options in 2022, 2021, or 2020. Restricted Stock Unit Activity For the years ended December 31, 2022, 2021 and 2020, PMI did not grant any RSUs. The following table summarizes the number of PMI’s RSU activity for the year ended December 31, 2022: Number of Shares Weighted-Average Grant Date Fair Value Unvested at January 1, 2022 2,874,348 $ 1.14 Forfeited (33,960) $ 2.18 Expired (238,005) $ 2.14 Unvested at December 31, 2022 2,602,383 $ 1.04 Stock Based Compensation The following table presents the amount of stock-based compensation related to stock-based awards granted to employees recognized in the Company’s Consolidated Statements of Operations for the periods presented (in thousands): Years Ended December 31, 2022 2021 2020 Origination and Servicing $ 134 $ 123 $ 35 Sales and Marketing 118 62 69 General and Administrative 1,074 951 1,809 Total Stock-Based Compensation $ 1,326 $ 1,136 $ 1,913 For the years ended December 31, 2022, 2021 and 2020, Prosper capi talized $200 thousand, $137 thousand and $234 thousand, respectively, of stock-based compensation as internal use software and website de velopment costs. As of December 31, 2022, the unamortized stock-based comp ensation expense adjusted for forfeiture estimates related to Prosper's employees’ unvested stock-based awards was approximately $2.8 million, which will be recognized over a remaining weighted-average vesting period of approximately 2.9 years.

INCOME TAXES

INCOME TAXES	12 Months Ended
	Dec. 31, 2022
Entity Information [Line Items]
INCOME TAXES	INCOME TAXES The components of the Company’s Income Tax Expense are as follows for the periods presented (in thousands): Years Ended December 31, 2022 2021 2020 Current: Federal $ — $ — $ — State 197 — — Foreign — — — Total Current Income Tax Expense (Benefit) 197 — — Deferred: Federal 47 47 47 State 51 24 38 Foreign — — (69) Total Deferred Income Tax Expense 98 71 16 Total Income Tax Expense $ 295 $ 71 $ 16 Income Tax Expense differed from the amount computed by applying the U.S. federal income tax rate of 21% to pretax income (loss) as a result of the following for the periods presented: Years Ended December 31, 2022 2021 2020 Federal tax at statutory rate 21 % 21 % 21 % State tax at statutory rate (net of federal benefit) 6 % 8 % 8 % Incentive stock options 1 % (5) % 2 % Preferred Stock Warrants (36) % (29) % (64) % Change in valuation allowance 15 % 6 % 37 % Return-to-provision (2) % — % — % State tax rate changes (5) % — % — % Other — % (1) % (4) % Income Tax Expense — % — % — % Temporary items that give rise to significant portions of deferred tax assets and liabilities are as follows for the periods presented (in thousands): December 31, 2022 2021 Net operating loss carry forwards $ 85,330 $ 91,793 Research and other credits 3,438 307 Stock compensation 4,025 4,272 Accrued liabilities 5,159 4,357 Lease liabilities 4,798 3,266 Property and equipment 1,214 — Section 174 R&D capitalization 11,204 — Total deferred tax assets 115,168 103,995 Net servicing rights (2,040) (1,898) Property and equipment — (1,873) Intangible assets (2,129) (1,770) Right-of-use assets (4,147) (2,264) Total deferred tax liabilities (8,316) (7,805) Total net deferred tax asset 106,852 96,190 Less: Valuation allowance (107,512) (96,750) Net deferred tax liability $ (660) $ (560) Under ASC 740, Accounting for Income Taxes , a valuation allowance must be established when it is more likely than not that all or a portion of a deferred tax asset will not be realized. The amount of valuation allowance is based upon management’s best estimate of Prosper’s ability to realize the net deferred tax assets. A valuation allowance can subsequently be reduced when management believes that the assets are realizable on a more-likely-than-not basis. As of December 31, 2022, the Company continues to record a valuation allowance against its net deferred tax asset. The valuation allowance as of December 31, 2022, increased by $10.8 million to $107.5 million from the prior year. The Internal Revenue Code imposes substantial restrictions on the utilization of net operating losses and tax credits in the event of an “ownership change” of a corporation. Accordingly, Prosper’s ability to utilize net operating losses and credit carryforwards may be limited in the future as the result of such an “ownership change.” Prosper files federal and various state income tax returns, and has net operating loss carryforwards available to reduce future taxable income, if any, for both federal and state income tax purposes of approximately $307.9 million and $372.3 million, respectively, as of December 31, 2022. The state net operating loss carryforwards are primarily related to California. The federal and state net operating loss carryforwards will begin to expire in 2027 and 2023, respectively. All net operating loss carryforwards are subject to a full valuation allowance. Prosper has federal and California research and development tax credits of approximately $2.8 million and $2.8 million, respectively. The federal research credits will begin to expire in 2034 and the California research credits have no expiration date. The following table summarizes Prosper’s activity related to its unrecognized tax benefits (in thousands): Balance at December 31, 2019 $ 112 Change related to 2020 tax year position — Balance at December 31, 2020 $ 112 Change related to 2021 tax year position — Balance at December 31, 2021 $ 112 Increase related to prior year tax position 1,179 Balance at December 31, 2022 $ 1,291 None of the unrecognized tax benefits would affect Prosper’s effective tax rate if these amounts are recognized due to the full valuation allowance. Prosper’s policy is to recognize interest and penalties accrued on any unrecognized tax benefits as a component of Income Tax Expense. As of December 31, 2022, Prosper has not incurred significant interest or penalties. All tax returns will remain open for examination by federal and most state taxing authorities for three Beginning in 2022, the Tax Cuts and Jobs Act of 2017 eliminates the option to deduct research and development expenditures and requires U.S. taxpayers to amortize them over five years pursuant to Internal Revenue Code Section 174, effective for tax year 2022. The enactment of IRC 174 did not have a material impact on the Company's income tax liabilities.
Prosper Funding LLC
Entity Information [Line Items]
INCOME TAXES	INCOME TAXES PFL incurred no income tax provision for the year ended December 31, 2022 and 2021. PFL is a U.S. disregarded entity and its income and loss are included in the income tax reporting of its parent, PMI. Since PMI is in a taxable loss position, is not currently subject to income taxes, and has fully reserved against its deferred tax asset, the net effective tax rate for PFL is 0%.

LEASES

LEASES	12 Months Ended
	Dec. 31, 2022
Leases [Abstract]
LEASES	LEASES Prosper has operating leases for corporate offices and datacenters. These leases have remaining lease terms of less than one year to approximately five years. Some of the lease agreements include options to extend the lease term for up to an additional five years . Rental expense under operating lease arrangements was $4.7 million, $4.5 million and $4.5 million for the years ended December 31, 2022, 2021 and 2020, respectively. Additionally, Prosper subleases certain leased office space to third parties when it determines there is excess leased capacity. Sublease revenue from operating lease arrangements was $0.7 million, $0.3 million and $0.4 million for the years ended December 31, 2022, 2021 and 2020, respectively. Operating Lease Right-of-Use Assets The following table summarizes the operating lease ROU assets as of December 31, 2022 , which are included in Property and Equipment, Net on the Consolidated Balance Sheets . December 31, 2022 Gross Carrying Value Accumulated Amortization Net Carrying Value ROU assets - office buildings $ 26,151 $ 12,215 $ 13,936 ROU assets - other 900 704 196 Total operating lease ROU assets $ 27,051 $ 12,919 $ 14,132 In May 2022, the Company entered into an amendment to its San Francisco office lease, the most prominent impact of which was to extend the lease term for the Company’s primary space in that office for an additional period through May 2028. As a result of this lease modification, the Company recorded additional ROU operating lease assets and liabilities of $9.9 million. The Company identified certain impairment triggers related to its ROU assets in 2020, primarily due to the non-renewal of certain sublease agreements and the time expected to find new subtenants. As a result of impairment testing performed on these ROU assets, the Company recorded an impairment charge of $0.4 million for the year ended December 31, 2020. No impairment charge was identified for the years ended December 31, 2022 and 2021 . Lease Liabilities Future maturities of operating lease liabilities as of December 31, 2022 were as follows (in thousands). The present value of the future minimum lease payments represents the Company’s operating lease liabilities as of December 31, 2022 and are included in “ Other Liabilities” December 31, 2022 2023 $ 3,715 2024 4,391 2025 4,517 2026 4,432 2027 3,311 Thereafter 1,411 Total future minimum lease payments 21,777 Less: Imputed interest (5,426) Present value of future minimum lease payments $ 16,351 Because the rate implicit in each lease is not readily determinable, we use our incremental borrowing rate to determine the present value of the lease payments. Supplemental cash flow information related to the Company’s operating leases is as follows (dollars in thousands): Years Ended December 31, 2022 2021 2020 Non-cash operating activity: ROU assets obtained or adjusted in exchange for new, amended and modified operating lease liabilities $ 9,980 $ 1,773 $ 290 The weighted-average remaining lease term and discount rate used in the calculation of the Company’s operating lease assets and liabilities are as follows (dollars in thousands): December 31, 2022 Weighted-average remaining lease term 4.88 years Weighted-average discount rate 10.96 %

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES	12 Months Ended
	Dec. 31, 2022
Entity Information [Line Items]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES In the normal course of its operations, Prosper becomes involved in various legal actions. Prosper maintains provisions it considers to be adequate for such actions. Prosper does not believe it is probable that the ultimate liability, if any, arising out of any such matters will have a material effect on Prosper's financial condition, results of operations or cash flows. Operating Commitments Prosper has entered into an agreement with WebBank, under which all Borrower Loans originated through the marketplace are made by WebBank under its bank charter. On June 25, 2021, PMI, along with its wholly-owned subsidiary Prosper Funding LLC, and WebBank entered into: (i) a Fifth Amendment (the “Sale Agreement Amendment”) to the Asset Sale Agreement, dated July 1, 2016, between Prosper Funding LLC and WebBank (the “Sale Agreement”); (ii) a Sixth Amendment (the “Marketing Agreement Amendment”) to the Marketing Agreement, dated July 1, 2016, between PMI and WebBank (the “Marketing Agreement”); and (iii) a Third Amendment (the “Purchase Agreement Amendment”) to the Stand By Purchase Agreement, dated July 1, 2016, between PMI and WebBank (the “Purchase Agreement” and, collectively with the Sale Agreement and the Marketing Agreement, the “Origination and Sale Agreements”). The Sale Agreement Amendment, the Marketing Agreement Amendment, and the Purchase Agreement Amendment, collectively, are hereinafter referred to as the “Amendments.” The Sale Agreement Amendment, among other things, extends the term of the Sale Agreement to February 1, 2025 and amends certain collateral requirements under the Sale Agreement. The Marketing Agreement Amendment, among other things, extends the term of the Marketing Agreement to February 1, 2025 and sets forth the amended terms and conditions of certain fees owed by the Registrants to WebBank under the Marketing Agreement. The Purchase Agreement Amendment amends certain collateral requirements of PMI under the Purchase Agreement. Pursuant to the Marketing Agreement Amendment, the marketing fee that Prosper receives in connection with the origination of each loan is partially reduced by an amount (the “Designated Amount”) calculated as a percentage of the principal amount of such loan based on the aggregate principal amount of loans originated for the applicable month. To the extent the aggregate Designated Amount for all loans originated during any month is less than $100,000 through February 1, 2025, Prosper is required to pay WebBank an amount equal to such deficiency. Accordingly, t he minimum fee is $1.2 million for each year from 2023 through 2024, and $0.1 million in 2025. Additionally, under the agreement with WebBank, Prosper is required to maintain minimum net liquidity of $15.0 million at all times during the term of the agreement. Net liquidity is defined as the sum of Cash, Cash Equivalents and Available for Sale Investments. Violation of this covenant can result in termination of the contract with WebBank. At December 31, 2022, Prosper was in compliance with the covenant. Loan Purchase Commitments Prosper entered into an agreement with WebBank to purchase $6.0 million of Borrower Loans that WebBank originated during the last two business days of the year ended December 31, 2022. Prosper will purchase these Borrower Loans within the first two business days of the year ending December 31, 2023. Repurchase Obligation Under the terms of the loan purchase agreements between Prosper and investors that participate in the Whole Loan Channel, Prosper may, in certain circumstances, become obligated to repurchase a Borrower Loan from an investor. Generally, these circumstances include the occurrence of verifiable identity theft, the failure to properly follow loan listing or bidding protocols or a violation of the applicable federal, state or local lending laws. Prosper recognizes a liability at fair value for the repurchase obligation when the Borrower Loans are sold. The fair value of the repurchase obligation is estimated based on historical experience. Repurchased Borrower Loans associated with violations of federal, state or local lending laws or verifiable identity theft are written off at the time of repurchase. The maximum potential amount of future payments associated with this obligation is the outstanding balances of the Borrower Loans issued through the Whole Loan Channel, which at December 31, 2022 is $3.7 billion. Prosper has accrued $0.3 million and $0.3 million as of December 31, 2022 and 2021, respectively, in regard to this obligation. Under the terms of the indenture and investor registration agreement, Prosper may, in certain circumstances, become obligated to either repurchase a Note or indemnify the investor for any losses resulting from nonpayment of a Note purchased in the Retail Channel. The decision to repurchase or indemnify is in Prosper’s sole discretion. These circumstances include, but are not limited to, the occurrence of verifiable identity theft, a technical error in the automated bidding tools which results in the purchase of a Note that does not match the investor’s investment criteria, or situations in which a loan listing includes a Prosper Rating that is different from the Prosper Rating that should have appeared in the listing for the corresponding Borrower Loan because either PFL inaccurately input data into, or inaccurately applied, the formula for determining the Prosper Rating and, as a result, the interest of the investor is materially and adversely affected. As of December 31, 2022, the Company has accrued $0.3 million for the repurchase of a portion of the underlying Notes, and agreed to indemnify an additional $1.2 million in outstanding Notes. Regulatory Contingencies Prosper accrues for contingencies when a loss from such contingencies is probable and the amount of loss can be reasonably estimated. In determining whether a loss is probable and if it is possible to quantify the amount of the estimated loss, Prosper reviews and evaluates its litigation and regulatory matters on at least a quarterly basis in light of potentially relevant factual and legal developments. If Prosper determines that an unfavorable outcome is not probable or that the amount of a loss cannot be reasonably estimated, Prosper does not accrue for a potential litigation loss. If an unfavorable outcome is probable and Prosper can estimate a range of outcomes, an amount is recorded which management considers to be the best estimate within the range of potential losses that are both probable and estimable; however, if management cannot quantify the amount of the estimated loss, then the low end of the range of the potential losses is recorded. West Virginia Matter In January 2018, the Attorney General of the State of West Virginia (the “Attorney General”) initiated discussions regarding certain acts and practices of PMI and PFL that the Attorney General asserts may have violated the West Virginia Consumer Credit and Protection Act (the “Consumer Act”), to which Prosper responded with such information as was requested by the Attorney General. Following a period of more than a year with limited to no communication, in February 2020, Prosper received a proposed Assurance of Discontinuance (an “AOD”) from the Attorney General requesting that, without in any way admitting that any of its prior practices were in violation of the Consumer Act, Prosper agree to certain terms and conditions regarding its past and potential future conduct of its business with respect to customers in West Virginia, including a release by the Attorney General of any claims it may have related to the matters identified in the AOD. Prosper is evaluating and intends to discuss the proposed terms in the AOD with the Attorney General. We cannot predict the outcome of the matter and any potential fines or penalties, if any, that may arise from the matter. Further, we are unable to estimate a range of outcomes and as a result no accrual has been made. No loans have been originated through the Prosper platform to West Virginians since June 2016.
Prosper Funding LLC
Entity Information [Line Items]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES In the normal course of its operations, PFL becomes involved in various legal actions. PFL maintains provisions it considers to be adequate for such actions. The Company does not believe it is probable that the ultimate liability, if any, arising out of any such matters will have a material effect on financial condition, results of operations or cash flows. Operating Commitments Prosper has entered into an agreement with WebBank, under which all Borrower Loans originated through the marketplace are made by WebBank under its bank charter. On June 25, 2021, PMI, along with PFL, and WebBank entered into: (i) a Fifth Amendment (the “Sale Agreement Amendment”) to the Asset Sale Agreement, dated July 1, 2016, between PFL and WebBank (the “Sale Agreement”); (ii) a Sixth Amendment (the “Marketing Agreement Amendment”) to the Marketing Agreement, dated July 1, 2016, between PMI and WebBank (the “Marketing Agreement”); and (iii) a Third Amendment (the “Purchase Agreement Amendment”) to the Stand By Purchase Agreement, dated July 1, 2016, between PMI and WebBank (the “Purchase Agreement” and, collectively with the Sale Agreement and the Marketing Agreement, the “Origination and Sale Agreements”). The Sale Agreement Amendment, the Marketing Agreement Amendment, and the Purchase Agreement Amendment, collectively, are hereinafter referred to as the “Amendments.” The Sale Agreement Amendment, among other things, extends the term of the Sale Agreement to February 1, 2025 and amends certain collateral requirements under the Sale Agreement. The Marketing Agreement Amendment, among other things, extends the term of the Marketing Agreement to February 1, 2025 and sets forth the amended terms and conditions of certain fees owed by the Registrants to WebBank under the Marketing Agreement. The Purchase Agreement Amendment amends certain collateral requirements of Prosper under the Purchase Agreement. Pursuant to the Marketing Agreement Amendment, the marketing fee that Prosper receives in connection with the origination of each loan is partially reduced by an amount (the “Designated Amount”) calculated as a percentage of the principal amount of such loan based on the aggregate principal amount of loans originated for the applicable month. To the extent the aggregate Designated Amount for all loans originated during any month is less than $100,000 through February 1, 2025, Prosper is required to pay WebBank an amount equal to such deficiency. Accordingly, the minimum fee is $1.2 million for each year from 2023 through 2024, and $0.1 million in 2025. Additionally, under the agreement with WebBank, Prosper is required to maintain minimum net liquidity of $15 million at all times during the term of the agreement. Net liquidity is defined as the sum of Cash, Cash Equivalents and Available for Sale Investments. Violation of this covenant can result in termination of the contract with WebBank. As of December 31, 2022 the Company was in compliance with the covenant. Loan Purchase Commitments Under the terms of PFL's agreement with WebBank, PFL is committed to purchase $6.0 million of Borrower Loans that WebBank originated during the last two business days of the year ended December 31, 2022. PFL will purchase these Borrower Loans within the first two business days of the year ending December 31, 2023. Repurchase Obligation Under the terms of the loan purchase agreements between PFL and investors that participate in the Whole Loan Channel, PFL may, in certain circumstances, become obligated to repurchase a Borrower Loan from an investor. Generally, these circumstances include the occurrence of verifiable identity theft, the failure to properly follow loan listing or bidding protocols or a violation of the applicable federal, state or local lending laws. The fair value of indemnification and repurchase obligation is estimated based on historical experience. PFL recognizes a liability for the repurchase and indemnification obligation when the Borrower Loans are issued. Indemnified or repurchased Borrower Loans associated with violations of federal, state or local lending laws or verifiable identity theft are written off at the time of repurchase or at the time an indemnification payment is made. The maximum potential amount of future payments associated under this repurchase obligation is the outstanding balances of the Borrower Loans issued through the Whole Loan Channel, which at December 31, 2022 was $3.7 billion. PFL has accrued $0.3 million and $0.3 million as of December 31, 2022 and 2021 respectively in regard to this obligation. Under the terms of the indenture and investor registration agreement, Prosper may, in certain circumstances, become obligated to either repurchase a Note or indemnify the investor for any losses resulting from nonpayment of a Note purchased in the Retail Channel. The decision to repurchase or indemnify is in Prosper’s sole discretion. These circumstances include, but are not limited to, the occurrence of verifiable identity theft, a technical error in the automated bidding tools which results in the purchase of a Note that does not match the investor’s investment criteria, or situations in which a loan listing includes a Prosper Rating that is different from the Prosper Rating that should have appeared in the listing for the corresponding Borrower Loan because either PFL inaccurately input data into, or inaccurately applied, the formula for determining the Prosper Rating and, as a result, the interest of the investor is materially and adversely affected. As of December 31, 2022, the Company has accrued $0.3 million for the repurchase of a portion of the underlying Notes, and agreed to indemnify an additional $1.2 million in outstanding Notes. Regulatory Contingencies PFL accrues for contingencies when a loss from such contingencies is probable and the amount of loss can be reasonably estimated. In determining whether a loss is probable and if it is possible to quantify the amount of the estimated loss, PFL reviews and evaluates its litigation and regulatory matters on at least a quarterly basis in light of potentially relevant factual and legal developments. If PFL determines that an unfavorable outcome is not probable or that the amount of a loss cannot be reasonably estimated, PFL does not accrue for a potential litigation loss. If an unfavorable outcome is probable and PFL can estimate a range of outcomes, PFL records the amount management considers to be the best estimate within the range of potential losses that are both probable and estimable; however, if management cannot quantify the amount of the estimated loss, then PFL records the low end of the range of those potential losses. West Virginia Matter In January 2018, the Attorney General of the State of West Virginia (the “Attorney General”) initiated discussions regarding certain acts and practices of PMI and PFL that the Attorney General asserts may have violated the West Virginia Consumer Credit and Protection Act (the “Consumer Act”), to which PMI responded with such information as was requested by the Attorney General. Following a period of more than a year with limited to no communication, in February 2020, PMI received a proposed Assurance of Discontinuance (an “AOD”) from the Attorney General requesting that, without in any way admitting that any of its prior practices were in violation of the Consumer Act, PMI agreed to certain terms and conditions regarding its past and potential future conduct of its business with respect to customers in West Virginia, including a release by the Attorney General of any claims it may have related to the matters identified in the AOD. PMI is evaluating and intends to discuss the proposed terms in the AOD with the Attorney General. We cannot predict the outcome of the matter and any potential fines or penalties, if any, that may arise from the matter. Further, we are unable to estimate a range of outcomes and as a result no accrual has been made.

RELATED PARTIES

RELATED PARTIES	12 Months Ended
	Dec. 31, 2022
Entity Information [Line Items]
RELATED PARTIES	RELATED PARTIES Since Prosper’s inception, it has engaged in various transactions with its directors, executive officers and holders of more than 10% of its voting securities, and immediate family members and other affiliates of its directors, executive officers, and 10% stockholders. Prosper believes that all of the transactions described below were made on terms no less favorable to Prosper than could have been obtained from unaffiliated third parties. Prosper’s executive officers, directors who are not executive officers, and certain affiliates participate in its marketplace by placing bids and purchasing Notes. The aggregate amount of the Notes purchased and the income earned by parties deemed to be affiliates and related parties of Prosper for the year ended December 31, 2022 and 2021, as well as the Notes outstanding as of December 31, 2022 and 2021 are summarized below (in thousands): Aggregate Amount of Notes Purchased for the Year Ended December 31, Interest Earned on Notes for the Year Ended December 31, 2022 2021 2022 2021 Executive officers and management $ 37 $ 35 $ 7 $ 7 Directors (excluding executive officers and management) — 24 1 1 Total $ 37 $ 59 $ 8 $ 8 Notes Balance as of December 31, 2022 December 31, 2021 Executive officers and management $ 52 $ 41 Directors (excluding executive officers and management) 6 15 Total $ 58 $ 56
Prosper Funding LLC
Entity Information [Line Items]
RELATED PARTIES	RELATED PARTIES Since inception, PFL has engaged in various transactions with its directors, executive officers, PMI, and immediate family members and other affiliates of its directors, executive officers and PMI. PFL believes that all of the transactions described below were made on terms no less favorable to PFL than could have been obtained from unaffiliated third parties. PFL’s executive officers and directors who are not executive officers participate in its marketplace by placing bids and purchasing Notes. The aggregate amount of the Notes purchased and the income earned by parties deemed to be related parties of PFL for the years ended December 31, 2022 and 2021 are summarized below (in thousands): Aggregate Amount of Notes Purchased for the Year Ended December 31, Interest Earned on Notes for the Year Ended December 31, 2022 2021 2022 2021 Executive officers and management $ 34 $ 35 $ 7 $ 7 Directors (excluding executive officers and management) — — — — Total $ 34 $ 35 $ 7 $ 7 The balance of Notes held by officers and directors who are not executive officers are as follows (in thousands): Notes Balance as of December 31, 2022 December 31, 2021 Executive officers and management $ 45 $ 41 Directors (excluding executive officers and management) — — Total $ 45 $ 41

POSTRETIREMENT BENEFIT PLANS

POSTRETIREMENT BENEFIT PLANS	12 Months Ended
	Dec. 31, 2022
Retirement Benefits [Abstract]
POSTRETIREMENT BENEFIT PLANS	POSTRETIREMENT BENEFIT PLANS Prosper has a 401(k) plan that covers all employees meeting certain eligibility requirements. The 401(k) plan is designed to provide tax-deferred retirement benefits in accordance with the provisions of Section 401(k) of the Internal Revenue Code. Eligible employees may defer up to 90% of eligible compensation up to the annual maximum as determined by the Internal Revenue Service. Prosper’s contributions to the plan are discretionary. During the years ended December 31, 2022, 2021 and 2020, Prosper contributed $2.7 million , $2.0 million and $1.2 million, respectively, to the 401(k) plan.

SIGNIFICANT CONCENTRATIONS

SIGNIFICANT CONCENTRATIONS	12 Months Ended
	Dec. 31, 2022
Entity Information [Line Items]
SIGNIFICANT CONCENTRATIONS	SIGNIFICANT CONCENTRATIONS Prosper is dependent on third party funding sources such as banks, asset managers, investment funds and Warehouse Lines to provide the funds to allow WebBank to originate Borrower Loans that the third party funding sources will later purchase. Of all Borrower Loans originated in the year ended December 31, 2022, two individual third parties purchased 23.4% and 10.4% of all Borrower Loans originated, and the Company’s Warehouse VIEs purchased 13.9% of such loans. For the year ended December 31, 2021, one individual party purchased 26.7% of all Borrower Loans originated, and the Company’s Warehouse VIEs purchased 12.6% of such loans. These purchases reflect that a significant portion of Prosper’s business is dependent on funding through the Whole Loan Channel, through which 92% and 88% of Borrower Loans were originated in the years ended December 31, 2022 and 2021, respectively.
Prosper Funding LLC
Entity Information [Line Items]
SIGNIFICANT CONCENTRATIONS	SIGNIFICANT CONCENTRATIONS PFL is dependent on third party funding sources such as banks, asset managers, and investment funds to provide the funds to allow WebBank to originate Borrower Loans that the third party funding sources will later purchase. Of all Borrower Loans originated in the year ended December 31, 2022, two individual party pu rchased 23.4% and 10.4% of such loans, and PMI’s Warehouse VIEs purchased 13.9% of such loans. For the year ended December 31, 2021, one individual party purchased 26.7% of such loans, and PMI’s Warehouse VIEs purchased 12.6% of such loans. These purchases reflect that a significant portion of PFL’s business is dependent on funding through the Whole Loan Channel, through which 92%

SEGMENTS

SEGMENTS	12 Months Ended
	Dec. 31, 2022
Entity Information [Line Items]
SEGMENTS	SEGMENTSStarting with the fourth quarter of 2022, the Company realigned its reportable and operating segments to better reflect the nature and materiality of its product offerings. As a result of these changes, the Company now has three reportable and operating segments: Personal Loan, Home Equity and Credit Card. Financial information for the years ended December 31, 2021 and 2020 presented below have been revised to conform with the current year presentation. The Company’s Chief Executive Officer, who serves as the chief operating decision maker (“CODM”) evaluates the financial performance of the Company’s segments based upon segment revenues and segment Adjusted EBITDA, a non-GAAP profitability measure. Items outside of Adjusted EBITDA are not reported by segment, since they are excluded from the measure of segment profitability reviewed by the CODM. The Company’s CODM does not use segment assets to allocate resources or to assess performance of the segments and, therefore, total segment assets have not been disclosed. The tables below present segment information reconciled to total Company Net Income (Loss) Before Income Taxes, as well as interest income and expense included in segment Adjusted EBITDA, for the periods indicated (in thousands). Year Ended December 31, 2022 Personal Loan Home Equity Credit Card Total Total Net Revenue $ 180,717 $ 2,821 $ 16,343 $ 199,881 Segment Adjusted EBITDA $ 2,053 $ (2,163) $ (8,946) $ (9,056) Depreciation expense: Origination and Servicing (8,132) General and Administrative (2,656) Amortization of intangibles (136) Stock-based compensation (1,326) Change in Fair Value of Convertible Preferred Stock Warrants 84,595 Gain on Forgiveness of PPP Loan 8,604 Interest income on cash and cash equivalents 511 Interest Expense on Term Loan (1,527) Net Income Before Income Taxes $ 70,877 Interest Income (Expense) Included in Segment Adjusted EBITDA Interest Income on Borrower Loans and Loans Held for Sale $ 86,350 $ — $ — $ 86,350 Interest Expense on Notes and Warehouse Lines (60,025) — — (60,025) Total Interest Income, Net $ 26,325 $ — $ — $ 26,325 Year Ended December 31, 2021 Personal Loan Home Equity Credit Card Total Total Net Revenue $ 143,670 $ 946 $ 10 $ 144,626 Segment Adjusted EBITDA $ 19,219 $ (2,556) $ (3,849) $ 12,814 Depreciation expense: Origination and Servicing (7,167) General and Administrative (2,501) Amortization of intangibles (172) Stock-based compensation (1,136) Change in Fair Value of Convertible Preferred Stock Warrants (138,622) Loss on Deconsolidation of VIEs (1,494) Interest income on cash and cash equivalents 8 Net Loss Before Income Taxes $ (138,270) Interest Income (Expense) Included in Segment Adjusted EBITDA Interest Income on Borrower Loans and Loans Held for Sale $ 83,107 $ — $ — $ 83,107 Interest Expense on Financial Instruments (50,816) — — (50,816) Total Interest Income, Net $ 32,291 $ — $ — $ 32,291 Because the Company’s Credit Card product launched in December 2021, all activity for the year ended December 31, 2020 related to the Personal Loan and Home Equity segments. Year Ended December 31, 2020 Personal Loan Home Equity Total Total Net Revenue $ 102,979 $ 257 $ 103,236 Segment Adjusted EBITDA $ (5,106) $ (3,481) $ (8,587) Depreciation expense: Organization and Servicing (5,830) General and Administrative (2,300) Amortization of intangibles (219) Impairment Expenses (445) Stock-based compensation (1,913) Change in Fair Value of Convertible Preferred Stock Warrants 37,677 Interest income on cash and cash equivalents 184 Net Income Before Income Taxes $ 18,567 Interest Income (Expense) Included in Segment Adjusted EBITDA Interest Income on Borrower Loans and Loans Held for Sale $ 104,150 $ — $ 104,150 Interest Expense on Financial Instruments (60,127) — (60,127) Total Interest Income, Net $ 44,023 $ — $ 44,023
Prosper Funding LLC
Entity Information [Line Items]
SEGMENTS	SEGMENTSPFL’s Chief Executive Officer, who serves as the chief operating decision maker, reviews financial information on a consolidated basis for purposes of allocating resources and evaluating financial performance. As such, the Company has a single reportable and operating segment.

SUBSEQUENT EVENTS

SUBSEQUENT EVENTS	12 Months Ended
	Dec. 31, 2022
Subsequent Events [Abstract]
SUBSEQUENT EVENTS	SUBSEQUENT EVENTSOn February 10, 2023, PMI extended its PWIIT Warehouse Line (“PWIIT 2023 Extension”). The PWIIT 2023 Extension increased the maximum borrowing amount from $300 million to $450 million, consisting of a $400 million Class A loan with the existing PWIIT Warehouse Line national banking association and a $50 million Class B loan with the existing asset manager. The total advance rate on the PWIIT 2023 Extension is the lesser of (a) 90% and (b) the sum of defined Class A and B advance rates determined primarily on the basis of a proprietary calculation developed by the lenders, which is expected to range from approximately 80% to 90%. This advance rate became applicable to all new and existing borrowings under the PWIIT Warehouse Line at the time the PWIIT 2023 Extension was signed. Under the PWIIT 2023 Extension, proceeds of loans made under the PWIIT Warehouse Line may be borrowed, repaid and reborrowed until the earlier of March 3, 2024 or the occurrence of any accelerated amortization event or event of default. Repayment of any outstanding proceeds will be made over a 24-month period ending March 4, 2026, excluding the occurrence of any accelerated amortization event or event of default. Under the PWIIT 2023 Extension, the Class A loan bears interest at a per annum rate of the national banking association's asset-backed commercial paper rate, plus a spread of 2.85%. The spread increases by 0.375% during the first 12 months immediately following the termination of the revolving period with an additional increase of 0.375% thereafter. Additionally, the Class A loan bears a monthly unused commitment fee of 0.75% per annum on the undrawn portion available under the Class A loan. The Class B loan bears interest at a per annum rate of adjusted one-month Term SOFR, plus a spread of 10.75%. The spread increases by 0.375% during the first twelve months immediately following the termination of the revolving period with an additional increase of 0.375% thereafter. Additionally, the Class B loan bears a monthly unused commitment fee of 0.50% or 1.00% per annum on the undrawn portion available under the Class B loan, depending on the Class B loan utilization percentage.

SUMMARY OF SIGNIFICANT ACCOUN_2

SUMMARY OF SIGNIFICANT ACCOUNT POLICIES (Policies)	12 Months Ended
	Dec. 31, 2022
Entity Information [Line Items]
Basis of Presentation	Basis of Presentation The accompanying consolidated financial statements include the accounts of PMI and its wholly owned subsidiaries including PFL, Prosper Healthcare Lending LLC (“PHL”), BillGuard, Inc. (“BillGuard”), and its consolidated VIEs including Prosper Warehouse I Trust (“PWIT”), Prosper Warehouse II Trust (“PWIIT”) and Prosper Grantor Trust (“PGT”). All intercompany balances and transactions between PMI and its subsidiaries have been eliminated in consolidation. PMI and PFL’s financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (“U.S. GAAP”).
Use of Estimates	Use of Estimates The preparation of the consolidated financial statements in conformity with U.S. GAAP requires management to make certain estimates, judgments and assumptions that affect the reported amounts of assets and liabilities and the related disclosures, including contingent liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting periods. These estimates, judgments and assumptions include but are not limited to the following: valuation of Loans Held for Sale, Borrower Loans and associated Notes, valuation of servicing rights, loan trailing fee liability and Credit Card Derivative, valuation allowance on deferred tax assets, stock-based compensation expense, Intangible Assets, Goodwill, Convertible Preferred Stock Warrant Liability, Repurchase Obligations and contingent liabilities. These judgments,
Consolidation of Variable Interest Entities	Consolidation of Variable Interest Entities A variable interest entity (VIE) is a legal entity that has either a total equity investment that is insufficient to finance its activities without additional subordinated financial support or whose equity investors lack the characteristics of a controlling financial interest. Prosper’s variable interest arises from contractual, ownership or other monetary interests in the entity, which change with fluctuations in the fair value of the entity’s net assets. A VIE is consolidated by its primary beneficiary, which is the party that has both the power to direct the activities that most significantly impact the VIE’s economic performance, and the obligation to absorb losses or the right to receive benefits of the VIE that could potentially be significant to the VIE. Prosper consolidates a VIE when it is deemed to be the primary beneficiary. Prosper assesses whether or not it is the primary beneficiary of a VIE on an ongoing basis.
Transfers of Financial Assets	Transfers of Financial Assets Prosper accounts for transfers of financial assets as sales when it has surrendered control over the transferred assets. Control is generally considered to have been surrendered when the transferred assets have been legally isolated from Prosper, the transferee has the right to pledge or exchange the assets without any significant constraints, and Prosper has not entered into a repurchase agreement, does not hold unconditional call options and has not written put options on the transferred assets. In assessing whether control has been surrendered, Prosper considers whether the transferee would be a consolidated affiliate and the impact of all arrangements or agreements made contemporaneously with, or in contemplation of the transfer, even if they were not entered into at the time of transfer. Prosper measures gain or loss on sale of financial assets as the net proceeds received on the sale less the carrying amount of the loans sold. The net proceeds of the sale include the fair value of any assets obtained or liabilities incurred as part of the transaction, including, but not limited to Servicing Assets, retained securities, and recourse obligations.
Fair Value Measurement	Fair Value Measurement Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Financial instruments measured at fair value consist principally of Borrower Loans, Loans Held for Sale (Note 4), Servicing Assets (Note 6), Credit Card Derivative (Note 5), Loan Trailing Fee Liabilities (Note 9), Debt (Note 10) and Convertible Preferred Stock Warrant Liability (Note 12). The estimated fair values of other financial instruments, including Cash and Cash Equivalents, Restricted Cash, Accounts Receivable, Accounts Payable and Accrued Liabilities, and Payable to Investors approximate their carrying values because of their short-term nature. The estimated fair values of the Term Loan and Warehouse Lines (Note 10) do not approximate their carrying values due primarily to differences in the stated and market rates associated with these instruments. The fair value hierarchy includes a three-level classification, which is based on whether the inputs to the valuation methodology used for measurement are observable: Level 1 — Quoted market prices in active markets for identical assets or liabilities. Level 2 — Inputs other than quoted prices included in Level 1 that are observable for the asset or liability either directly or indirectly. Level 3 — Unobservable inputs. When developing fair value measurements, Prosper maximizes the use of observable inputs and minimizes the use of unobservable inputs. However, for certain instruments Prosper must utilize unobservable inputs in determining fair value due to the lack of observable inputs in the market, which requires greater judgment in measuring fair value. In instances where there is limited or no observable market data, fair value measurements for assets and liabilities are determined using assumptions that management believes a market participant would use in pricing the asset or liability. As observable market prices are not available for the Borrower Loans, Loans Held for Sale, Notes, Servicing Assets and Credit Card Derivative, or for similar assets and liabilities, Prosper believes the Borrower Loans, Loans Held for Sale, Notes, Servicing Assets and Credit Card Derivative are considered level 3 financial instruments. Prosper primarily uses a discounted cash flow model to estimate their fair value, and key assumptions used in valuation include default rates and prepayment rates derived from market data and historical performance and discount rates based on estimates of the rates of return that investors would require when investing in financial instruments with similar characteristics. The obligation to pay principal and interest on any series of Notes is equal to the loan payments, if any, that are received on the corresponding Borrower Loan, net of our servicing fee which is 1.0% of the outstanding balance. The fair value election for Notes and Borrower Loans allows both the assets and the related liabilities to receive similar accounting treatment
Cash and Cash Equivalents	Cash and Cash Equivalents Cash includes various unrestricted deposits with investment-grade rated financial institutions. Cash equivalents consist of highly liquid marketable securities with original maturities of three months or less at the time of purchase and consist primarily of money market funds, commercial paper, US treasury securities and US agency securities. Cash equivalents are recorded at cost, which approximates fair value. At times, our cash balances may exceed federally insured amounts and potentially subject the Company to a concentration of credit risk. The Company believes that no significant concentration of credit risk exists with respect to these balances based on its assessment of the creditworthiness of these financial institutions.
Restricted Cash	Restricted Cash Restricted cash consists primarily of cash deposits, money market funds and short term certificate of deposit accounts held as collateral as required for loan funding and servicing activities, and cash that investors or Prosper have on the marketplace that has not yet been invested in Borrower Loans or disbursed to the investor.
Borrower Loans, Loans Held for Sale and Notes	Borrower Loans, Loans Held for Sale and Notes Borrower Loans are funded either through the Note Channel or through the Whole Loan Channel. Through the Note Channel, Prosper purchases Borrower Loans from WebBank, then issues Notes and holds the Borrower Loans until maturity. The obligation to repay a series of Notes issued through the Note Channel is dependent upon the repayment of the associated Borrower Loan. Borrower Loans funded and Notes issued through the Note Channel are carried on Prosper’s consolidated balance sheets as assets and liabilities, respectively. Prosper uses Warehouse Lines to purchase Loans Held for Sale that may be subsequently contributed to securitization transactions or sold to investors. Loans Held for Sale are included in “Loans Held for Sale, at Fair Value” in the Consolidated Balance Sheets. See Note 10 - Debt for more details on Warehouse Lines. Borrower Loans and Loans Held for Sale are purchased from WebBank. Prosper places Borrower Loans and Loans Held for Sale on non-accrual status when they are 120 days past due. When a loan is placed on non-accrual status, Prosper stops accruing interest and reverses all accrued but unpaid interest as of such date. Additionally, Prosper charges-off Borrower Loans and Loans Held for Sale when they are 120 days past due. The fair value of loans 120 or more days past due generally consists of the expected recovery from debt sales in subsequent periods. Prosper has elected the fair value option for Borrower Loans, Loans Held for Sale and Notes. Changes in fair value of Borrower Loans funded through the Note Channel are largely offset by the changes in fair value of Notes due to the borrower payment-dependent design of the Notes. Changes in fair value of Loans Held for Sale are recorded through Proper's earnings and Prosper collects interest on Loans Held for Sale. Changes in the fair values of Borrower Loans, Loans Held for Sale and Notes are included in Change in Fair Value of Financial Instruments on the accompanying Consolidated Statements of Operations.
Credit Card Derivative	Credit Card Derivative The Company evaluated the terms of the Credit Card program agreement with Coastal and determined that it contained features that met the definition of derivatives under Accounting Standards Codification (“ASC”) 815, Derivatives and Hedging . These features are freestanding financial instruments (as defined under ASC 480, Distinguishing Liabilities from Equity ), and have been valued separately as derivatives. A right of offset exists between the derivatives, and they are presented net on the accompanying consolidated balance sheets. Changes in the fair value of the Credit Card Derivative are recorded in Change in Fair Value of Financial Instruments on the accompanying Consolidated Statements of Operations.
Servicing Assets	Servicing Assets Prosper records Servicing Assets at their estimated fair values for servicing rights retained when Prosper sells Borrower Loans to unrelated third-party buyers. The change in fair value of Servicing Assets is recognized in Servicing Fees, Net. The gain or loss on a loan sale is recorded in (Loss) Gain on Sale of Borrower Loans while the fair value of the servicing rights, which is based on the degree to which the contractual loan servicing fee is above or below an estimated market servicing rate is recorded in Servicing Assets on the Consolidated Balance Sheets. Prosper uses a discounted cash flow model to estimate the fair value of the loan Servicing Assets which considers the contractual servicing fee revenue that Prosper earns on the Borrower Loans, the estimated market servicing rates to service such loans, the prepayment rates, the default rates and the current principal balances of the Borrower Loans.
Property and Equipment	Property and Equipment Property and Equipment consists of computer equipment, office furniture and equipment, leasehold improvements, software purchased or developed for internal use and web site development costs. Property and Equipment is stated at cost, less accumulated depreciation and amortization, and is computed using the straight-line method based upon estimated useful lives of the assets. Estimated useful lives of the assets are as follows: Furniture and fixtures 7 years Office equipment 5 years Computers and equipment 3 years Leasehold improvements 5 - 8 years Software and website development costs 1 - 5 years The costs to develop software for the website and other internal uses are capitalized when management has authorized and committed project funding, when preliminary development efforts are successfully completed, and when it is probable that the project will be completed and the software will be used as intended. Capitalized software and website development costs primarily include software licenses acquired, fees paid to outside consultants and salaries and payroll-related costs for employees directly involved in the development efforts. Costs incurred prior to meeting these criteria, together with costs incurred for training and maintenance, are expensed. Costs incurred for upgrades and enhancements that are considered to be probable to result in additional functionality are capitalized. Capitalized costs are included in Property and Equipment and amortized to expense using the straight-line method over their expected lives. Software and website development assets are evaluated for impairment whenever events or changes in circumstances indicate that the carrying amount of such assets may not be recoverable. Recoverability of software and website development assets to be held and used is measured by a comparison of the carrying amount of the asset group to the future net undiscounted cash flows expected to be generated by the asset group. If such software and website development assets are considered to be impaired, the impairment to be recognized is the excess of the carrying amount over the fair value of the software and website development asset group.
Leases	Leases Management determines if an arrangement is a lease at inception. Operating lease right-of-use (“ROU”) assets and operating lease liabilities are included on the Consolidated Balance Sheets in Property and Equipment, Net and in Other Liabilities, respectively. For certain leases with original terms of twelve months or less, PMI recognizes the lease expense as incurred and does not record ROU assets and lease liabilities.
Goodwill and Intangibles	Goodwill and Intangibles Goodwill associated with business combinations is computed by recognizing the portion of the purchase price that is not tied to individually identifiable and separately recognizable assets. Goodwill is assigned to the Company’s reporting units at the acquisition date according to the expected economic benefits that the acquired business will provide to the reporting unit. A reporting unit is a business operating segment or a component of a business operating segment. The Company identifies its reporting units based on how the operating segments and reporting units are managed. Accordingly, the Company allocated the entire balance of goodwill to the Personal Loan reportable and operating segment. Refer to Note 20 for further information on the Company’s reportable and operating segments. Goodwill is not amortized but is tested for impairment annually or whenever indications of impairment exist. Annual impairment testing occurs on October 1. Impairment exists whenever the carrying value of Goodwill exceeds its implied fair value. Adverse changes in impairment indicators such as loss of key personnel, increased regulatory oversight or unplanned changes in operations could result in impairment. PMI did not recognize any Goodwill impairment during the years ended December 31, 2022, 2021 and 2020. Costs of internally developing any intangibles is expensed as incurred. Intangible Assets identified through the acquisitions of American Healthcare Lending and BillGuard include customer relationships, technology and a brand name. The user base and customer relationship Intangible Assets are being amortized on an accelerated basis over a three three
Payable to Investors	Payable to Investors Payable to Investors primarily represents the obligation to investors related to cash held in an account for the benefit of investors and payments-in-process received from borrowers.
Term Loan	Term Loan Prosper entered into a Credit Agreement, which provided for a Term Loan with a third-party financial institution in November 2022, which is more fully described in Note 10. This Term Loan is carried at amortized cost, net of discounts and issuance costs, which are subsequently amortized to Interest Expense on Term Loan over the life of the underlying agreement.
Warehouse Lines	Warehouse Lines Warehouse Lines are carried at amortized cost. Prosper defers specific incremental costs directly related to entering into the Warehouse Lines and subsequently amortizes them into interest expense over the life of the arrangements.
Convertible Redeemable Preferred Stock Warrant Liability	Convertible Preferred Stock Warrant Liability Prosper has entered into varying arrangements with investors to issue preferred stock warrants in exchange for their participation as a purchaser of Borrower Loans. In all cases, these warrants are free standing financial instruments due to their status as legally detached and separately exercisable warrants without conditions requiring Prosper to repurchase those warrants or the underlying preferred shares. These freestanding warrants are accounted for in accordance with ASC 480, Distinguishing Liabilities from Equity . Under ASC 480, vested freestanding warrants to purchase the Company’s convertible redeemable preferred stock are classified as a liability on the Consolidated Balance Sheets and carried at fair value because the warrants may conditionally obligate the Company to transfer assets at some point in the future. The Company records the warrants at fair value on issuance. The warrants are subject to remeasurement to fair value at each balance sheet date, and any change in their fair value is recognized as “ Change in Fair Value of Convertible Preferred Stock Warrants
Loan Trailing Fee Liability	Loan Trailing Fee Liability On July 1, 2016, Prosper signed a series of agreements with WebBank which, among other things, includes an additional program fee (the “Loan Trailing Fee”) paid to WebBank in connection with the performance of each loan sold to Prosper. These agreements became effective as of August 1, 2016. The Loan Trailing Fee is dependent on the amount and timing of principal and interest payments made by borrowers of the underlying loans, irrespective of whether the loans are sold by Prosper, and gives WebBank an ongoing financial interest in the performance of the loans it originates. This fee is paid by Prosper to WebBank over the term of the respective loans and is a function of the principal and interest payments made by borrowers of such loans. In the event that principal and interest payments are not made with respect to any loan, Prosper is not required to make the related Loan Trailing Fee payment. The obligation to pay the Loan Trailing Fee for any loan sold to Prosper is recorded at fair value at the time of the origination of such loan within Other Liabilities and recorded as a reduction of “Transaction Fees, net”. Any changes in the fair value of this liability are recorded in “Servicing Fees, Net” on the Consolidated Statements of Operations. The fair value of the Loan Trailing Fee represents the present value of the expected monthly Loan Trailing Fee payments, which takes into consideration certain assumptions related to expected prepayment rates and defaults rates.
Revenue Recognition	Revenue Recognition Revenue primarily results from Transaction and Servicing Fees and Net Interest Income earned. Fees include Transaction Fees for our services performed on behalf of WebBank to originate a loan, as well as program fees and broker fees generated from our Credit Card product and Home Equity products, respectively. PMI also has other smaller sources of revenue reported as Other Revenues, including referral and incentive fees. Transaction Fees Prosper has a customer contract with WebBank to facilitate the origination of all Borrower Loans through Prosper’s marketplace. In exchange for these services, Prosper earns a transaction fee from WebBank that is recognized when performance is complete and upon the successful origination of a Borrower Loan. The transaction fee Prosper earns is determined by the term and credit grade of the Borrower Loan that is facilitated on Prosper’s marketplace, and ranges from 1.0% to 5.0% of the original principal amount of each Borrower Loan that WebBank originates. Prosper records the transaction fee net of any fees paid to WebBank because Prosper does not receive an identifiable benefit from WebBank other than the borrower loan that has been recognized at fair value. The Company also generates various Credit Card program fees through its partnership with Coastal. These include interchange fees, annual fees and late fees, which compensate Prosper for its role in marketing and growing the Credit Card product. Interchange and late fees are recognized as they are generated each month, while annual fees received are deferred and recognized over the annual period to which they relate. Additionally, the Company generates broker fees on Home Equity products through its partnership with Spring EQ. Servicing Fees Investors who purchase Borrower Loans from Prosper typically pay Prosper a servicing fee which is generally set at 1.0% pe r annum of the outstanding principal balance of the borrower loan prior to applying the current payment, plus an additional 0.075% per annum to cover the Loan Trailing Fee. The servicing fee compensates Prosper for the costs incurred in servicing the borrower loan, including managing payments from borrowers, managing payments to investors and maintaining investors’ account portfolios. Prosper records Servicing Fees from investors as a component of operating revenue when received. Under the Credit Card program agreement, Prosper is responsible for servicing the entire underlying Credit Card portfolio. Coastal pays the Company a 1% per annum servicing fee on the daily outstanding balance of receivables designated as Coastal Allocations. To the extent these servicing fees do not exceed the market servicing rate a market participant would require to service the entire Credit Card portfolio, the Company records a servicing obligation liability and measures it at fair value throughout the servicing period. Changes in the fair value of the servicing obligation liability are recorded in Servicing Fees. (Loss) Gain on Sale of Borrower Loans Prosper recognizes gains or losses on the sale of Borrower Loans when it sells Borrower Loans to third parties. Prosper measures gain or loss on sale of Borrower Loans as the net proceeds received on a sale less the fair value of the Borrower Loans sold. The net proceeds of the sale represent the fair value of any assets obtained or liabilities incurred as part of the transaction, including, but not limited to Servicing Assets, retained securities, repurchase obligations and any incentives provided or received at the time of sale. Interest Income on Borrower Loans and Loans Held for Sale and Interest Expense on Notes and Warehouse Lines Prosper recognizes interest income on Borrower Loans and Loans Held for Sale using the accrual method based on the stated interest rate to the extent we believe it to be collectible. We record interest expense on the corresponding Notes, at Fair Value, Notes Issued by Securitization Trust, Certificates Issued by Securitization Trust, and Warehouse Lines based on the contractual interest rates. Other Revenues Other Revenues consist primarily of credit referral fees. These fees are earned from partner companies for the referral of customers on the Company’s platform. The transaction price is a fixed amount per referral and is recognized by the Company upon a successful referral. Other revenues also include incentive fees earned from partner companies through established incentive programs and miscellaneous net fees related to the Company’s Credit Card program.
Advertising Costs	Advertising CostsAdvertising costs are expensed when incurred and are included in “Sales and Marketing” expense in the accompanying Consolidated Statements of Operations.
Stock-Based Compensation	Stock-Based Compensation Management determines the fair value of the Company's stock options issued to employees on the date of grant using the Black-Scholes option pricing model, which is impacted by the fair value of Common Stock as well as by changes in assumptions that include, but are not limited to, the expected Common Stock price volatility over the term of the option awards, the expected term of the awards, risk-free interest rates and the expected dividend yield. PMI recognizes compensation expense for stock-based awards on a straight-line basis over the period during which an employee is required to provide services in exchange for the award (the vesting period of the award). Stock-based compensation expense is recognized only for those awards expected to vest. PMI estimates future forfeitures at the date of grant and revises the estimates, if necessary, in subsequent periods if actual forfeitures differ from estimates. Stock-based awards issued to non-employees are marked-to-market up until the point that the awards measurement period has been achieved. Compensation expense for stock options issued to non-employees is calculated using the Black-Scholes option pricing model and is recorded over the vesting period of the award.
Income Taxes	Income Taxes The asset and liability method is used to account for income taxes. Under this method, deferred income tax assets and liabilities are based on the differences between the financial statement carrying values and tax bases of assets and liabilities that will result in taxable or deductible amounts in the future based on enacted tax laws and rates applicable to the periods in which the differences are expected to affect taxable income. Valuation allowances are established when necessary to reduce deferred tax assets to the amount expected to be realized. Prosper’s policy is to include interest and penalties related to gross unrecognized tax benefits within its provision for income taxes. U.S. Federal, California and other state income tax returns are filed. Prosper is not currently undergoing any income tax examinations. Due to the cumulative net operating loss, generally all tax years remain open. Prosper recognizes benefits from uncertain tax positions only if management believes that it is more likely than not that the tax position will be sustained on examination by the taxing authorities based on the technical merits of the position. The tax benefits in the financial statements from such positions are then measured based on the largest benefit that has a greater than 50% likelihood of being realized upon settlement.
Other Income, Net	Other Income, NetOther Income, Net consists primarily of interest income from Cash and Cash Equivalents and sublease income.
Recent Accounting Pronouncements	Recent Accounting Pronouncements Accounting Standards Issued, to be Adopted by the Company in Future Periods In March 2020, the FASB issued ASU No. 2020-04, “Reference Rate Reform (Topic 848),” which provides optional expedients and exceptions for applying GAAP on contract modifications and hedge accounting, in order to ease the financial reporting burdens of the expected market transition from LIBOR and other interbank offered rates to alternative referenced rates, such as the Secured Overnight Financing Rate. The optional guidance, which became effective on March 12, 2020, could be applied through December 31, 2022. In December 2022, the FASB issued No 2022-06 extending the sunset date of the relief provided under ASU No. 2020-04 to December 31, 2024. The Company is currently evaluating the impact reference rate reform will have on its contracts that reference LIBOR in order to determine whether to adopt this guidance.
Prosper Funding LLC
Entity Information [Line Items]
Basis of Presentation	Basis of Presentation PFL’s consolidated financial statements include the accounts of PFL and its wholly-owned subsidiary, Prosper Depositor LLC. All intercompany balances and transactions between PFL and Prosper Depositor LLC have been eliminated in consolidation. PFL’s financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (“U.S. GAAP”).
Use of Estimates	Use of Estimates The preparation of PFL’s consolidated financial statements in conformity with U.S. GAAP requires management to make certain estimates, judgments and assumptions that affect the reported amounts of assets and liabilities and the related disclosures at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting periods. These estimates, judgments and assumptions include, but are not limited to, the following: valuation of Loans Held for Sale, Borrower Loans and associated Notes, valuation of servicing rights, valuation of loan trailing fee liability, repurchase obligations, and contingent liabilities. PFL bases its estimates on historical experience from all Borrower Loans and on various other assumptions that it believes to be reasonable under the circumstances. Actual results could differ materially from estimates.
Consolidation of Variable Interest Entities	Consolidation of Variable Interest Entities A variable interest entity (VIE) is a legal entity that has either a total equity investment that is insufficient to finance its activities without additional subordinated financial support or whose equity investors lack the characteristics of a controlling financial interest. PFL’s variable interest arises from contractual, ownership or other monetary interests in the entity, which change with fluctuations in the fair value of the entity’s net assets. A VIE is consolidated by its primary beneficiary, which is the party that has both the power to direct the activities that most significantly impact the VIE’s economic performance, and the obligation to absorb losses or the right to receive benefits of the VIE that could potentially be significant to the VIE. PFL consolidates a VIE when it is deemed to be the primary beneficiary. PFL assesses whether or not it is the primary beneficiary of a VIE on an ongoing basis.
Transfers of Financial Assets	Transfers of Financial Assets PFL accounts for transfers of financial assets as sales when it has surrendered control over the transferred assets. Control is generally considered to have been surrendered when the transferred assets have been legally isolated from PFL, the transferee has the right to pledge or exchange the assets without any significant constraints, and PFL has not entered into a repurchase agreement, does not hold unconditional call options and has not written put options on the transferred assets. In assessing whether control has been surrendered, PFL considers whether the transferee would be a consolidated affiliate and the impact of all arrangements or agreements made contemporaneously with, or in contemplation of the transfer, even if they were not entered into at the time of transfer. PFL measures gain or loss on sale of financial assets as the net proceeds received on the sale less the carrying amount of the loans sold. The net proceeds of the sale represent the fair value of any assets obtained or liabilities incurred as part of the transaction, including, but not limited to Servicing Assets, retained securities, and recourse obligations.
Fair Value Measurement	Fair Value Measurement Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Financial instruments consist principally of Cash and Cash Equivalents, Restricted Cash, Borrower Loans, Loans Held for Sale, Servicing Assets, Loan Trailing Fee Liability, Accounts Receivable, Accounts Payable and Accrued Liabilities, Payable to Investors and Notes. The estimated fair values of Cash and Cash Equivalents, Restricted Cash, Accounts Receivable, Accounts Payable and Accrued Liabilities, and Payable to Investors approximate their carrying values because of their short term nature. The fair value hierarchy includes a three-level classification, which is based on whether the inputs to the valuation methodology used for measurement are observable: Level 1 — Quoted market prices in active markets for identical assets or liabilities. Level 2 — Inputs other than quoted prices included in Level 1 that are observable for the asset or liability either directly or indirectly. Level 3 — Unobservable inputs. When developing fair value measurements, PFL maximizes the use of observable inputs and minimizes the use of unobservable inputs. However, for certain instruments PFL must utilize unobservable inputs in determining fair value due to the lack of observable inputs in the market, which requires greater judgment in measuring fair value. In instances where there is limited or no observable market data, fair value measurements for assets and liabilities are determined using assumptions that management believes a market participant would use in pricing the asset or liability. As observable market prices are not available for the Borrower Loans, Loans Held for Sale, Notes, and Servicing Assets, or for similar assets and liabilities, PFL believes the Borrower Loans, Loans Held for Sale, Notes, and Servicing Assets should be considered level 3 financial instruments. PFL primarily uses a discounted cash flow model to estimate their fair value and key assumptions used in valuation include default rates and prepayment rates derived from historical performance and
Cash and Cash Equivalents	Cash and Cash EquivalentsCash includes various unrestricted deposits with highly rated financial institutions. Cash equivalents consist of highly liquid marketable securities with original maturities of three months or less at the time of purchase and consist primarily of money market funds, commercial paper, U.S. treasury securities and U.S. agency securities. Cash equivalents are recorded at cost, which approximates fair value.
Restricted Cash	Restricted Cash Restricted Cash consists primarily of cash deposits, money market funds and short-term certificate of deposit accounts held as collateral as required for long term leases, loan funding and servicing activities, and cash that investors have on our marketplace that has not yet been invested in Borrower Loans or disbursed to the investor.
Borrower Loans, Loans Held for Sale and Notes	Borrower Loans, Loans Held for Sale and Notes With respect to the Note Channel, PFL purchases Borrower Loans from WebBank, then issues Notes and holds the Borrower Loans until maturity. The obligation to repay a series of Notes funded through the Note Channel is dependent upon the repayment of the associated Borrower Loan. Borrower Loans and Notes funded through the Note Channel are carried on PFL’s consolidated balance sheets as assets and liabilities, respectively. PFL places Borrower Loans and Loans Held for Sale on non-accrual status when they are 120 days past due. When a loan is placed on non-accrual status, PFL stops accruing interest and reverses all accrued but unpaid interest as of such date. Additionally, PFL charges-off Borrower Loans and Loans Held for Sale when they are 120 days past due. The fair value of loans 120 days past due generally consists of the expected recovery from debt sales in subsequent periods. Management has elected the fair value option for Borrower Loans, Loans Held for Sale, and Notes. Changes in fair value of Borrower Loans are largely offset by the changes in fair value of Notes due to the borrower payment-dependent design of the Notes. Changes in fair value of Borrower Loans, Loans Held for Sale and Notes are included in “Change in Fair Value of Financial Instruments, Net” on the Consolidated Statements of Operations. PFL primarily uses a discounted cash flow model to estimate the fair value of Borrower Loans, Loans Held for Sale and Notes. The key assumptions used in the valuation include default rates and prepayment rates derived primarily from historical performance and discount rates based on estimates of the rates of return that investors would require when investing in financial instruments with similar characteristics.
Servicing Assets	Servicing Assets PFL records Servicing Assets at their estimated fair values for servicing rights retained when PFL sells Borrower Loans to unrelated third-party buyers. The change in fair value of Servicing Assets is recognized in revenue as Servicing Fees, Net. The gain or loss on a loan sale is recorded in Gain on Sale of Borrower Loans while the fair value of the servicing rights, which is based on the degree to which the contractual loan servicing fee is above or below an estimated market loan servicing rate, is recorded in Servicing Assets on the Consolidated Balance Sheets.
Software and Website Development	Software and Website Development Software and website development represents the software and website development costs that PMI transferred to PFL. PFL does not develop any of its own software or its website. Software and website development are included in Property and Equipment, Net and amortized to expense using the straight-line method over their expected lives which is generally one
Payable to Investors	Payable to Investors Payable to Investors primarily represents the Company's obligation to investors related to cash held in an account for the benefit of investors and payments-in-process received from borrowers.
Loan Trailing Fee Liability	Loan Trailing Fee Liability On July 1, 2016, PMI signed a series of agreements with WebBank which, among other things, includes an additional program fee (the “Loan Trailing Fee”) paid to WebBank in connection with the performance of each loan sold to PMI. These agreements were effective as of August 1, 2016. The Loan Trailing Fee is dependent on the amount and timing of principal and interest payments made by borrowers of the underlying loans, irrespective of whether the loans are sold by PMI, and gives WebBank an ongoing financial interest in the performance of the loans it originates. This fee is paid by PMI to WebBank over the term of the respective loans and is a function of the principal and interest payments made by borrowers of such loans. In the event that principal and interest payments are not made with respect to any loan, PMI is not required to make the related Loan Trailing Fee payment. The obligation to pay the Loan Trailing Fee for any loan sold to PMI is recorded at fair value at the time of the origination of such loan within Other Liabilities and recorded as a reduction of “Transaction Fees, net”. Any changes in the fair value of this liability are recorded in “Servicing Fees, Net” on the Consolidated Statements of Operations. The fair value of the Loan Trailing Fee represents the present value of the expected monthly Loan Trailing Fee payments, which takes into consideration certain assumptions related to expected prepayment rates and defaults rates.
Revenue Recognition	Revenue Recognition Revenue primarily results from fees, net interest earned and gains on the sale of Borrower Loans. Fees consist of related party administrative fees and Servicing Fees paid by investors. The Company also has other smaller sources of revenue reported as Other Revenues including fees charged in relation to securitizations by outside investors. Administration Agreement License Fees PFL primarily generates revenues through license fees it earns through an Administration Agreement with PMI. The Administration Agreement contains a license granted by PFL to PMI that entitles PMI to use the platform for and in relation to: (i) PMI’s performance of its duties and obligations under the Administration Agreement relating to corporate administration, loan platform services, loan and Note servicing and marketing, and (ii) PMI’s performance of its duties and obligations to WebBank in relation to loan origination and funding. The license fees are based on the number of listings that are posted to the platform. Service Fees Investors who purchase Borrower Loans from PFL through the Whole Loan Channel typically pay PFL a servicing fee which is currently set at 1.0% per annum of the outstanding principal balance of the Borrower Loan prior to applying the current payment , plus an additional 0.075% per annum to cover the Loan Trailing Fee . The servicing fee com pensates PFL for the costs incurred in servicing the Borrower Loan, including managing payments from borrowers, managing payments to investors and maintaining investors’ account portfolios. PFL records Servicing Fees from investors as a component of operating revenue when received. Gain on Sale of Borrower Loans PFL recognizes gains or losses on the sale of Borrower Loans when it sells Borrower Loans to third parties. PFL measures gain or loss on sale of Borrower Loans as the net proceeds received on the sale less the fair value of the Borrower Loans sold. The net proceeds of the sale represent the fair value of any assets obtained or liabilities incurred as part of the transaction, including, but not limited to Servicing Assets, retained securities, and repurchase obligations. Interest Income on Borrower Loans and Interest Expense on Notes PFL recognizes interest income on Borrower Loans originated through the Note Channel and interest expense on the corresponding Notes using the accrual method based on the stated interest rate to the extent PFL believes it to be collectable.
Administration Fee Expense - Related Party	Administration Fee Expense - Related PartyPursuant to the Administration Agreement between PFL and PMI, PMI manages the marketplace on behalf of PFL. Accordingly each month, PFL is required to pay PMI an administration fee that is based on PMI’s (a) finance and legal personnel costs, (b) number of Borrower Loans originated through the Marketplace, (c) Servicing Fees collected by or on behalf of PFL, and (d) nonsufficient funds fees collected by or on behalf of PFL.
Recent Accounting Pronouncements	Recent Accounting Pronouncements Accounting Standards Adopted in the Current Period No accounting standards were adopted in the current period for PFL. Accounting Standards Issued, to be Adopted in Future Periods No issued and pending accounting standards were identified that are expected to have an impact on PFL.

SUMMARY OF SIGNIFICANT ACCOUN_3

SUMMARY OF SIGNIFICANT ACCOUNT POLICIES (Tables)	12 Months Ended
	Dec. 31, 2022
Accounting Policies [Abstract]
Schedule of Estimated Useful Lives of Assets	Estimated useful lives of the assets are as follows: Furniture and fixtures 7 years Office equipment 5 years Computers and equipment 3 years Leasehold improvements 5 - 8 years Software and website development costs 1 - 5 years

PROPERTY AND EQUIPMENT, NET (Ta

PROPERTY AND EQUIPMENT, NET (Tables)	12 Months Ended
	Dec. 31, 2022
Entity Information [Line Items]
Schedule of Property and Equipment	Property and Equipment, Net consists of the following at the dates presented (in thousands): December 31, 2022 2021 Internal-use software and website development costs $ 49,818 $ 41,816 Operating lease right-of-use assets 27,051 17,485 Computer equipment 13,444 15,090 Office equipment and furniture 2,810 2,961 Leasehold improvements 7,157 7,167 Assets not yet placed in service 5,877 5,224 Property and equipment 106,157 89,743 Less: Accumulated depreciation and amortization (67,343) (60,029) Total Property and Equipment, Net $ 38,814 $ 29,714
Prosper Funding LLC
Entity Information [Line Items]
Schedule of Property and Equipment	Property and Equipment consist of the following as of the dates presented (in thousands): December 31, 2022 2021 Internal-use software and web site development costs $ 37,428 $ 31,979 Less: Accumulated depreciation and amortization (27,424) (24,072) Total Property and Equipment, Net $ 10,004 $ 7,907

BORROWER LOANS, LOANS HELD FO_2

BORROWER LOANS, LOANS HELD FOR SALE AND NOTES, AT FAIR VALUE (Tables)	12 Months Ended
	Dec. 31, 2022
Entity Information [Line Items]
Schedule of Borrower Loans, Notes and Loans Held for Sale	As of December 31, 2022 and 2021, Borrower Loans, Loans Held for Sale and Notes were as follows (in thousands): Borrower Loans Loans Held for Sale Notes 2022 2021 2022 2021 2022 2021 Aggregate principal balance outstanding $ 333,294 $ 265,232 $ 512,076 $ 242,278 $ 336,555 $ 267,415 Fair value adjustments (12,652) 2,394 (12,311) 892 (17,851) (1,430) Fair value $ 320,642 $ 267,626 $ 499,765 $ 243,170 $ 318,704 $ 265,985
Prosper Funding LLC
Entity Information [Line Items]
Schedule of Borrower Loans, Notes and Loans Held for Sale	The aggregate principal balances outstanding and fair values of Borrower Loans and Notes as of December 31, 2022 and 2021, are presented in the following table (in thousands): Borrower Loans Notes December 31, 2022 December 31, 2021 December 31, 2022 December 31, 2021 Aggregate principal balance outstanding $ 333,294 $ 265,232 $ 336,555 $ 267,415 Fair value adjustments (12,652) 2,394 (17,851) (1,430) Fair value $ 320,642 $ 267,626 $ 318,704 $ 265,985

FAIR VALUE OF ASSETS AND LIAB_2

FAIR VALUE OF ASSETS AND LIABILITIES (Tables)	12 Months Ended
	Dec. 31, 2022
Entity Information [Line Items]
Schedule of Fair Value Hierarchy for Assets and Liabilities Measured at Fair Value	The following tables present the fair value hierarchy for assets and liabilities measured at fair value (in thousands): Balance at December 31, 2022 Level 1 Inputs Level 2 Inputs Level 3 Inputs Total Assets: Borrower Loans, at Fair Value $ — $ — $ 320,642 $ 320,642 Loans Held for Sale, at Fair Value — — 499,765 499,765 LIBOR rate swaption (Note 10) — 1,289 — 1,289 Servicing Assets — — 12,562 12,562 Credit Card Derivative (Note 5) — — 10,782 10,782 Total Assets $ — $ 1,289 $ 843,751 $ 845,040 Liabilities: Notes, at Fair Value $ — $ — $ 318,704 $ 318,704 Convertible Preferred Stock Warrant Liability — — 166,346 166,346 Loan Trailing Fee Liability (Note 9) — — 3,290 3,290 Credit Card servicing obligation liability (Note 5) — — 3,720 3,720 Total Liabilities $ — $ — $ 492,060 $ 492,060 Balance at December 31, 2021 Level 1 Inputs Level 2 Inputs Level 3 Inputs Total Assets: Borrower Loans, at Fair Value $ — $ — $ 267,626 $ 267,626 Loans Held for Sale, at Fair Value — — 243,170 243,170 LIBOR rate swaption — 66 — 66 Servicing Assets — — 8,761 8,761 Total Assets $ — $ 66 $ 519,557 $ 519,623 Liabilities: Notes, at Fair Value $ — $ — $ 265,985 $ 265,985 Convertible Preferred Stock Warrant Liability — — 250,941 250,941 Loan Trailing Fee Liability (Note 9) — — 2,161 2,161 Total Liabilities $ — $ — $ 519,087 $ 519,087
Schedule of Quantitative Information About Significant Unobservable Inputs	The following tables present quantitative information about the ranges of significant unobservable inputs used for the Company’s Level 3 fair value measurements at December 31, 2022 and 2021: December 31, 2022 2021 Borrower Loans, Loans Held for Sale, and Notes: Discount rate 5.4 % — 13.2 % 4.2 % — 14.3 % Default rate 1.8 % — 18.7 % 2.0 % — 14.1 % At December 31, 2022 and 2021, the discounted cash flow methodology used to estimate the Note fair values used the same projected cash flows as the related Borrower Loans. December 31, 2022 2021 Servicing Assets: Discount rate 15.0 % — 25.0 % 15.0 % — 25.0 % Default rate 2.0 % — 19.3 % 1.5 % — 14.1 % Prepayment rate 14.2 % — 28.0 % 10.2 % — 32.3 % Market servicing rate (1) (2) 0.648 % — 0.842 % 0.648 % — 0.842 % (1) Servicing assets associated with loans enrolled in a relief program offered by the Company in response to the COVID-19 pandemic as of December 31, 2022 were measured using a market servicing rate assumption of 84.2 basis points. This rate was estimated using a multiplier consistent with observable market rates for other loan types, applied to the base market servicing rate assumption of 64.8 basis points. (2) Excludes collection fees that would be passed on to a hypothetical third-party servicer. As of December 31, 2022 and 2021, the market rate for collection fees and non-sufficient fund fees was assumed to be 6 basis points and 6 basis points, respectively, for a weighted-average total market servicing rat e of 70.8 basis points to 90.2 basis points and 70.8 basis points to 90.2 basis points, respectively. December 31, 2022 2021 Loan Trailing Fee Liability: Discount rate 15.0 % — 25.0 % 15.0 % — 25.0 % Default rate 2.0 % — 19.3 % 1.5 % — 14.1 % Prepayment rate 14.2 % — 28.0 % 10.2 % — 32.3 %
Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis	The following table presents additional information about Level 3 Loans Held for Sale, Borrower Loans, Notes and Certificates Issued by Securitization Trust measured at fair value on a recurring basis for the year ended December 31, 2022 and 2021 (in thousands): Assets Liabilities Borrower Loans Held Notes Certificates Issued by Securitization Trust Total Fair Value at January 1, 2021 $ 378,263 $ 274,621 $ (208,379) $ (22,917) $ 421,588 Purchase of Borrower Loans/Issuance of Notes 232,000 1,712,705 (231,933) — 1,712,772 Principal repayments (260,689) (164,165) 172,250 14,934 (237,670) Borrower Loans sold to third parties (2,664) (1,580,164) — — (1,582,828) Other changes (1,518) (249) 167 113 (1,487) Change in fair value 595 422 1,910 (6,110) (3,183) Deconsolidation of VIEs (78,361) — — 13,980 (64,381) Fair Value at December 31, 2021 267,626 243,170 (265,985) — 244,811 Purchase of Borrower Loans/Issuance of Notes 284,921 3,063,729 (285,115) — 3,063,535 Principal repayments (187,599) (184,090) 202,308 — (169,381) Borrower Loans sold to third parties (14,520) (2,599,881) — — (2,614,401) Other changes 650 1,804 (742) — 1,712 Change in fair value (30,436) (24,967) 30,830 — (24,573) Fair Value at December 31, 2022 $ 320,642 $ 499,765 $ (318,704) $ — $ 501,703
Schedule of Servicing Assets and Liabilities Measured at Fair Value	The following table presents additional information about the Level 3 Servicing Assets measured at fair value on a recurring basis for the year ended December 31, 2022 and 2021 (in thousands): Servicing Assets Fair Value at January 1, 2021 $ 9,242 Additions 7,973 Recognition of Servicing Assets upon deconsolidation of VIEs 215 Less: Change in fair value (8,669) Fair Value at December 31, 2021 $ 8,761 Additions 12,957 Less: Change in fair value (9,156) Fair Value at December 31, 2022 $ 12,562 The following table presents additional information ab out the Level 3 Credit Card Derivative measured at fair value on a recurring basis for the year ended December 31, 2022 and 2021 (in tho usands): Credit Card Derivative Fair Value at December 31, 2020 $ — Change in fair value 7 Fair Value at December 31, 2021 $ 7 Change in fair value 9,784 Gains from settled transactions 4,295 Less: Net payments received (3,304) Fair Value at December 31, 2022 $ 10,782 The following table presents additional information ab out the Level 3 Credit Card servicing obligation liability measured at fair value on a recurring basis for the year ended December 31, 2022 (in tho usands). There was no material activity related to this account for the year ended December 31, 2021. Credit Card Servicing Obligation Liability Fair Value at December 31, 2021 $ — Change in fair value 3,720 Fair Value at December 31, 2022 $ 3,720 The following table presents additional information about the Level 3 Convertible Preferred Stock Warrant Liability measured at fair value on a recurring basis for the year ended December 31, 2022 and 2021 (in thousands): Convertible Preferred Stock Warrant Liability Fair Value at January 1, 2021 $ 112,319 Change in fair value 138,622 Fair Value at December 31, 2021 $ 250,941 Change in fair value (84,595) Fair Value at December 31, 2022 $ 166,346
Schedule of Level 3 Liabilities Measured on Recurring Basis	The following table presents additional information about Level 3 Loan Trailing Fee Liability measured at fair value on a recurring basis for the year ended December 31, 2022 and 2021 (in thousands): Loan Trailing Fee Liability Balance at January 1, 2021 $ 2,233 Issuances 1,775 Cash payment of Loan Trailing Fee (2,100) Change in fair value 253 Balance at December 31, 2021 $ 2,161 Issuances 3,070 Cash payment of Loan Trailing Fee (2,245) Change in fair value 304 Balance at December 31, 2022 $ 3,290
Schedule of Fair Value Assumptions	Key economic assumptions and the sensitivity of the fair value to immediate changes in those assumptions at December 31, 2022 and 2021 for Borrower Loans and Loans Held for Sale are presented in the following table (in thousands, except percentages). Borrower Loans and Loans Held for Sale: December 31, 2022 December 31, 2021 Fair value, using the following assumptions: $ 820,407 $ 510,796 Weighted-average discount rate 6.72 % 5.64 % Weighted-average default rate 9.31 % 10.08 % Fair value resulting from: 100 basis point increase in discount rate $ 812,061 $ 505,732 200 basis point increase in discount rate $ 803,927 500,763 Fair value resulting from: 100 basis point decrease in discount rate $ 828,975 $ 516,064 200 basis point decrease in discount rate $ 837,773 521,437 Fair value resulting from: Applying a 1.1 multiplier to default rate $ 810,657 $ 506,362 Applying a 1.2 multiplier to default rate $ 800,989 501,921 Fair value resulting from: Applying a 0.9 multiplier to default rate $ 830,238 $ 515,326 Applying a 0.8 multiplier to default rate $ 840,156 519,851 Key economic assumptions and the sensitivity of the fair value to immediate changes in those assumptions at December 31, 2022 and 2021 for Notes are presented in the following table (in thousands, except percentages). Notes: December 31, 2022 December 31, 2021 Fair value, using the following assumptions: $ 318,704 $ 265,985 Weighted-average discount rate 6.87 % 5.76 % Weighted-average default rate 11.36 % 10.70 % Fair value resulting from: 100 basis point increase in discount rate $ 315,456 $ 263,326 200 basis point increase in discount rate $ 312,291 260,735 Fair value resulting from: 100 basis point decrease in discount rate $ 322,037 $ 268,714 200 basis point decrease in discount rate $ 325,461 271,516 Fair value resulting from: Applying a 1.1 multiplier to default rate $ 314,892 $ 263,644 Applying a 1.2 multiplier to default rate $ 311,112 261,318 Fair value resulting from: Applying a 0.9 multiplier to default rate $ 322,547 $ 268,340 Applying a 0.8 multiplier to default rate $ 326,425 270,711
Schedule Of Estimated Fair Value Of Sensitivity Assets And Liabilities	Key economic assumptions and the sensitivity of the fair value to immediate changes in those assumptions at December 31, 2022 and 2021 for Servicing Assets is presented in the following table (in thousands, except percentages). Servicing Assets: December 31, 2022 December 31, 2021 Fair value, using the following assumptions: $ 12,562 $ 8,761 Weighted-average market servicing rate 0.650 % 0.650 % Weighted-average prepayment rate 18.47 % 20.82 % Weighted-average default rate 13.38 % 12.54 % Fair value resulting from: Market servicing rate increase of 0.025% $ 11,708 $ 8,203 Market servicing rate decrease of 0.025% $ 13,415 $ 9,320 Fair value resulting from: Applying a 1.1 multiplier to prepayment rate $ 12,286 $ 8,568 Applying a 0.9 multiplier to prepayment rate $ 12,842 $ 8,957 Fair value resulting from: Applying a 1.1 multiplier to default rate $ 12,305 $ 8,646 Applying a 0.9 multiplier to default rate $ 12,820 $ 8,878
Schedule of Derivative Assets Measured at Fair Value	Key economic assumptions and the sensitivity of the fair value to immediate changes in those assumptions at December 31, 2022 for the Credit Card Derivative is presented in the following table (in thousands, except percentages). Credit Card Derivative: December 31, 2022 Fair value, using the following assumptions: $ 10,782 Discount rate on Prosper Allocations 26.23 % Discount rate on Coastal Program Fee 9.26 % Prepayment rate applied to Credit Card portfolio 10.08 % Default rate applied to Credit Card portfolio 13.34 % Fair value resulting from: 100 basis point increase in both discount rates $ 10,699 200 basis point increase in both discount rates $ 10,618 Fair value resulting from: 100 basis point decrease in both discount rates $ 10,866 200 basis point decrease in both discount rates $ 10,951 Fair value resulting from: Applying a 1.1 multiplier to prepayment rate $ 10,625 Applying a 0.9 multiplier to prepayment rate $ 10,942 Fair value resulting from: Applying a 1.1 multiplier to default rate $ 8,001 Applying a 0.9 multiplier to default rate $ 13,641
Schedule of Derivative Liability Measured at Fair Value	Key economic assumptions and the sensitivity of the fair value to immediate changes in those assumptions at December 31, 2022 for Credit Card servicing obligation liability is presented in the following table (in thousands, except percentages). Credit Card servicing obligation liability: December 31, 2022 Fair value, using the following assumptions: 3,720 Discount rate on Credit Card portfolio servicing obligation 9.26 % Prepayment rate applied to Credit Card portfolio 10.08 % Default rate applied to Credit Card portfolio 13.34 % Market servicing rate 2.00 % Fair value resulting from: 100 basis point increase in discount rate $ 3,677 200 basis point increase in discount rate $ 3,616 Fair value resulting from: 100 basis point decrease in discount rate $ 3,774 200 basis point decrease in discount rate $ 3,830 Fair value resulting from: Applying a 1.1 multiplier to prepayment rate $ 3,662 Applying a 0.9 multiplier to prepayment rate $ 3,779 Fair value resulting from: Applying a 1.1 multiplier to default rate $ 3,636 Applying a 0.9 multiplier to default rate $ 3,806
Schedule of Financial Instruments, Assets And Liabilities Not Recorded at Fair Value	The following tables present the fair value hierarchy for assets and liabilities not recorded at fair value (in thousands): Balance at December 31, 2022 Carrying Amount Level 1 Inputs Level 2 Inputs Level 3 Inputs Fair Value Assets: Cash and Cash Equivalents $ 83,446 $ 83,446 $ — $ — $ 83,446 Restricted Cash - Cash and Cash Equivalents 108,284 108,284 — — 108,284 Restricted Cash - Certificates of Deposit 4,879 — 4,879 — 4,879 Accounts Receivable 3,462 — 3,462 — 3,462 Total Assets $ 200,071 $ 191,730 $ 8,341 $ — $ 200,071 Liabilities: Accounts Payable and Accrued Liabilities $ 37,254 $ — $ 37,254 $ — $ 37,254 Payable to Investors 85,312 — 85,312 — 85,312 Warehouse Lines 446,762 — 444,329 — 444,329 Term Loan (Note 10) 73,407 — 76,191 — 76,191 Total Liabilities $ 642,735 $ — $ 643,086 $ — $ 643,086 Balance at December 31, 2021 Carrying Amount Level 1 Inputs Level 2 Inputs Level 3 Inputs Fair Value Assets: Cash and Cash Equivalents $ 67,700 $ 67,700 $ — $ — $ 67,700 Restricted Cash - Cash and Cash Equivalents 163,047 163,047 — — 163,047 Restricted Cash - Certificates of Deposit 4,878 — 4,878 — 4,878 Accounts Receivable 1,054 — 1,054 — 1,054 Total Assets $ 236,679 $ 230,747 $ 5,932 $ — $ 236,679 Liabilities: Accounts Payable and Accrued Liabilities $ 25,790 $ — $ 25,790 $ — $ 25,790 Payable to Investors 152,794 — 152,794 — 152,794 Warehouse Lines 209,275 — 211,177 — 211,177 Paycheck Protection Program loan (Note 10) 8,590 — 8,556 — 8,556 Total Liabilities $ 396,449 $ — $ 398,317 $ — $ 398,317
Prosper Funding LLC
Entity Information [Line Items]
Schedule of Fair Value Hierarchy for Assets and Liabilities Measured at Fair Value	The following tables present the fair value hierarchy for assets and liabilities measured at fair value (in thousands): December 31, 2022 Level 1 Inputs Level 2 Inputs Level 3 Inputs Total Assets: Borrower Loans, at Fair Value $ — $ — $ 320,642 $ 320,642 Servicing Assets — — 14,860 14,860 Total Assets $ — $ — $ 335,502 $ 335,502 Liabilities: Notes, at Fair Value $ — $ — $ 318,704 $ 318,704 Loan Trailing Fee Liability* — — 3,290 3,290 Total Liabilities $ — $ — $ 321,994 $ 321,994 December 31, 2021 Level 1 Inputs Level 2 Inputs Level 3 Inputs Total Assets: Borrower Loans, at Fair Value $ — $ — $ 267,626 $ 267,626 Servicing Assets — — 9,796 9,796 Total Assets $ — $ — $ 277,422 $ 277,422 Liabilities: Notes, at Fair Value $ — $ — $ 265,985 $ 265,985 Loan Trailing Fee Liability* — — 2,161 2,161 Total Liabilities $ — $ — $ 268,146 $ 268,146 *Included in Other Liabilities on the Consolidated Balance Sheets.
Schedule of Quantitative Information About Significant Unobservable Inputs	The following tables present quantitative information about the significant unobservable inputs used for PFL’s Level 3 fair value measurements at the dates presented: Range Borrower Loans and Notes: December 31, 2022 December 31, 2021 Discount rate 5.6 % — 12.9 % 4.3 % — 13.9 % Default rate 1.8 % — 18.2 % 2.0 % — 13.5 % Range Servicing Assets: December 31, 2022 December 31, 2021 Discount rate 15.0 % — 25.0 % 15.0 % — 25.0 % Default rate 2.0 % — 19.3 % 1.5 % — 14.1 % Prepayment rate 14.2 % — 28.0 % 10.2 % — 32.3 % Market servicing rate (1) (2) 0.648 % — 0.842 % 0.648 % — 0.842 % (1) Servicing assets associated with loans enrolled in a relief program offered by the Company in response to the COVID-19 pandemic as of December 31, 2022 and 2021 were measured using a market servicing rate assumption of 84.2 basis points. This rate was estimated using a multiplier consistent with observable market rates for other loan types, applied to the base market servicing rate assumption of 64.8 basis points. (2) Excludes collection fees that would be passed on to a hypothetical third-party servicer. As of December 31, 2022 and 2021, the market rate for collection fees and non-sufficient fund fees was assumed to be 6 basis points and 6 basis points, respectively, for a weighted-average total market servicing rate of 70.8 basis points to 90.2 basis points and 70.8 basis points to 90.2 basis points, respectively. Range Loan Trailing Fee Liability: December 31, 2022 December 31, 2021 Discount rate 15.0 % — 25.0 % 15.0 % — 25.0 % Default rate 2.0 % — 19.3 % 1.5 % — 14.1 % Prepayment rate 14.2 % — 28.0 % 10.2 % — 32.3 %
Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis	The following table presents additional information about Level 3 Loans Held for Sale, Borrower Loans, and Notes measured at fair value on a recurring basis for the year ended December 31, 2022 and 2021 (in thousands): Fair Value Measurements Using Significant Unobservable Inputs (Level 3) Assets Liabilities Borrower Loans Held Notes Total Fair value at January 1, 2021 $ 209,670 $ — $ (208,379) $ 1,291 Originations 232,000 1,712,705 (231,933) 1,712,772 Principal repayments (171,286) — 172,250 964 Borrower Loans sold to third parties (1,422) (1,712,705) — (1,714,127) Other changes (195) — 166 (29) Change in fair value (1,141) — 1,911 770 Fair value at December 31, 2021 $ 267,626 $ — $ (265,985) $ 1,641 Originations 284,921 3,063,729 (285,115) 3,063,535 Principal repayments (187,599) — 202,308 14,709 Borrower Loans sold to third parties (14,520) (3,063,729) — (3,078,249) Other changes 650 — (742) (92) Change in fair value (30,436) — 30,830 394 Fair value at December 31, 2022 $ 320,642 $ — $ (318,704) $ 1,938
Schedule of Servicing Assets and Liabilities Measured at Fair Value	The following table presents additional information about Level 3 Servicing Assets recorded at fair value (in thousands): Servicing Assets Fair value at January 1, 2021 $ 11,088 Additions 9,020 Change in fair value (10,312) Fair value at December 31, 2021 $ 9,796 Additions 15,277 Change in fair value (10,213) Fair value at December 31, 2022 $ 14,860 Loan Trailing Fee Liability The fair value of the Loan Trailing Fee Liability represents the present value of the expected monthly Loan Trailing Fee payments, which takes into consideration certain assumptions related to expected prepayment rates and default rates using a discounted cash flow model. The assumptions used are the same as those used for the valuation of Servicing Assets, as described below. The following tables present additional information about Level 3 Loan Trailing Fee Liability measured at fair value on a recurring basis (in thousands): Loan Trailing Fee Liability Fair Value at January 1, 2021 $ 2,233 Issuances 1,775 Cash payment of Loan Trailing Fee (2,100) Change in fair value 253 Fair Value at December 31, 2021 $ 2,161 Issuances 3,070 Cash payment of Loan Trailing Fee (2,245) Change in fair value 304 Fair Value at December 31, 2022 $ 3,290
Schedule of Fair Value Assumptions	Key economic assumptions are used to compute the fair value of Borrower Loans and Notes. The sensitivity of the current fair value to immediate changes in assumptions at December 31, 2022 and 2021 for Borrower Loans are presented in the following table (in thousands, except percentages): Borrower Loans: December 31, 2022 December 31, 2021 Fair value, using the following assumptions: $ 320,642 $ 267,626 Weighted-average discount rate 6.87 % 5.76 % Weighted-average default rate 11.36 % 10.70 % Fair value resulting from: 100 basis point increase in discount rate $ 317,380 $ 265,104 200 basis point increase in discount rate $ 314,201 $ 262,499 Fair value resulting from: 100 basis point decrease in discount rate $ 323,991 $ 270,520 200 basis point decrease in discount rate $ 327,429 $ 273,337 Fair value resulting from: Applying a 1.1 multiplier to default rate $ 316,832 $ 265,435 Applying a 1.2 multiplier to default rate $ 313,053 $ 263,107 Fair value resulting from: Applying a 0.9 multiplier to default rate $ 324,484 $ 270,133 Applying a 0.8 multiplier to default rate $ 328,361 $ 272,505 Key economic assumptions are used to compute the fair value of Notes. The sensitivity of the fair value to immediate changes in assumptions at December 31, 2022 and 2021 for Notes funded through the Note Channel are presented in the following table (in thousands, except percentages): Notes: December 31, 2022 December 31, 2021 Fair value, using the following assumptions: $ 318,704 $ 265,985 Weighted-average discount rate 6.87 % 5.76 % Weighted-average default rate 11.36 % 10.70 % Fair value resulting from: 100 basis point increase in discount rate $ 315,456 $ 263,326 200 basis point increase in discount rate $ 312,291 $ 260,735 Fair value resulting from: 100 basis point decrease in discount rate $ 322,037 $ 268,714 200 basis point decrease in discount rate $ 325,461 $ 271,516 Fair value resulting from: Applying a 1.1 multiplier to default rate $ 314,892 $ 263,644 Applying a 1.2 multiplier to default rate $ 311,112 $ 261,318 Fair value resulting from: Applying a 0.9 multiplier to default rate $ 322,547 $ 268,340 Applying a 0.8 multiplier to default rate $ 326,425 $ 270,711
Schedule Of Estimated Fair Value Of Sensitivity Assets And Liabilities	Key economic assumptions are used to compute the fair value of Servicing Assets. The sensitivity of the current fair value to immediate changes in assumptions at December 31, 2022 and 2021 for Servicing Assets are presented in the following table (in thousands, except percentages): Servicing Assets: December 31, 2022 December 31, 2021 Fair value, using the following assumptions: $ 14,860 $ 9,796 Weighted-average market servicing rate 0.649 % 0.650 % Weighted-average prepayment rate 18.77 % 20.82 % Weighted-average default rate 12.63 % 12.24 % Fair value resulting from: Market servicing rate increase of 0.025% $ 13,850 $ 9,171 Market servicing rate decrease of 0.025% $ 15,870 $ 10,421 Fair value resulting from: Applying a 1.1 multiplier to prepayment rate $ 14,534 $ 9,580 Applying a 0.9 multiplier to prepayment rate $ 15,191 $ 10,015 Fair value resulting from: Applying a 1.1 multiplier to default rate $ 14,557 $ 9,667 Applying a 0.9 multiplier to default rate $ 15,165 $ 9,926

GOODWILL AND OTHER INTANGIBLE_2

GOODWILL AND OTHER INTANGIBLE ASSETS, NET (Tables)	12 Months Ended
	Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Other Intangible Assets for the Periods Presented	The following table presents the detail of other Intangible Assets subject to amortization as of the following dates (dollars in thousands): December 31, 2022 Gross Carrying Value Accumulated Amortization Net Carrying Value Remaining Useful Life (In Years) Developed technology $ 3,060 $ (3,060) $ — — User base and customer relationships 5,050 (4,858) 192 2.3 Brand name 60 (60) — — Total Intangible Assets subject to amortization $ 8,170 $ (7,978) $ 192 December 31, 2021 Gross Carrying Value Accumulated Amortization Net Carrying Value Remaining Useful Life (In Years) Developed technology $ 3,060 $ (3,060) $ — — User base and customer relationships 5,050 (4,722) 328 3.3 Brand name 60 (60) — — Total Intangible Assets subject to amortization $ 8,170 $ (7,842) $ 328
Schedule of Estimated Amortization of Purchased Intangible Assets	Estimated amortization of purchased Intangible Assets for future periods is as follows (in thousands): Amounts Years Ending December 31, 2023 $ 107 2024 85 Total Amortization Expenses $ 192

OTHER LIABILITIES (Tables)

OTHER LIABILITIES (Tables)	12 Months Ended
	Dec. 31, 2022
Other Liabilities [Abstract]
Schedule of Other Liabilities	Other Liabilities consists of the following (in thousands): December 31, 2022 2021 Operating lease liabilities (Note 15) $ 16,351 $ 11,026 Deferred revenue 3,880 1,196 Credit Card servicing obligation liability (Note 5) 3,720 — Loan trailing fee liability 3,290 2,161 Deferred income tax liability 658 560 Financing lease liabilities — 78 Paycheck Protection Program loan (Note 10) — 8,590 Other 359 289 Total Other Liabilities $ 28,258 $ 23,900

NET INCOME (LOSS) PER SHARE (Ta

NET INCOME (LOSS) PER SHARE (Tables)	12 Months Ended
	Dec. 31, 2022
Earnings Per Share [Abstract]
Schedule of Basic and Diluted Net Income (Loss) Per Share	Basic and diluted net income (loss) per share were calculated as follows for the periods presented (in thousands, except share and per share amounts): December 31, 2022 2021 2020 Numerator: Net Income (Loss) $ 70,582 $ (138,341) $ 18,551 Plus: Return on Share Purchase — — 2,381 Less: Net Income Allocated to Participating Securities (47,350) — (15,172) Net Income (Loss) Attributable to Common Stockholders $ 23,232 $ (138,341) $ 5,760 Denominator: Weighted average shares used in computing basic and diluted Net Income (Loss) Per Share 73,291,714 70,767,275 68,592,557 Effect of dilutive securities: Stock options 61,466,722 — 24,816,184 Warrants 570,313 — — Convertible preferred stock warrants 213,264,845 — 213,264,845 Weighted average shares used in computing diluted net income (loss) per share - diluted 348,593,594 70,767,275 306,673,586 Net Income (Loss) Per Share – Basic $ 0.32 $ (1.95) $ 0.08 Net Income (Loss) Per Share – Diluted $ 0.07 $ (1.95) $ 0.02
Schedule of Dilutive Shares Excluded from the Diluted Net Income (Loss) Per Share Calculation	The following common stock equivalents were excluded from the computation of diluted net income (loss) per share for the periods presented because including them would have been anti-dilutive (number of shares): December 31, 2022 2021 2020 Excluded Securities: Convertible Preferred Stock issued and outstanding 158,365,655 158,365,655 158,365,655 Stock options issued and outstanding 17,703,550 72,756,708 48,265,056 Warrants issued and outstanding 510,036 1,080,349 1,080,349 Series E-1 Convertible Preferred Stock warrants — 35,544,141 — Series F Convertible Preferred Stock warrants — 177,720,704 — Total Excluded Securities 176,579,241 445,467,557 207,711,060

CONVERTIBLE PREFERRED STOCK, _2

CONVERTIBLE PREFERRED STOCK, CONVERTIBLE PREFERRED STOCK WARRANT LIABILITY AND COMMON STOCK (Tables)	12 Months Ended
	Dec. 31, 2022
Stockholders' Equity Note [Abstract]
Schedule of Shares Authorized, Issued, Outstanding, Par Value and Liquidation Preference of Convertible Preferred Stock	The number of authorized, issued and outstanding shares, their par value and liquidation preference for each series of Convertible Preferred Stock as of December 31, 2022 are disclosed in the table below (amounts in thousands, except share and par value amounts): Par Value Authorized Shares Outstanding and Issued Shares Liquidation Preference, Outstanding Shares Series A $ 0.01 68,558,220 66,428,185 * $ 19,160 Series A-1 $ 0.01 24,760,915 22,515,315 45,031 Series B $ 0.01 35,775,880 35,127,160 * 21,190 Series C $ 0.01 24,404,770 24,404,770 70,075 Series D $ 0.01 23,888,640 23,888,640 165,000 Series E-1 $ 0.01 35,544,141 — — Series E-2 $ 0.01 16,858,078 — — Series F $ 0.01 177,720,707 3 — Series G $ 0.01 37,249,497 37,249,497 50,000 Total 444,760,848 209,613,570 $ 370,456 * Series A and Series B Convertible Preferred Stock totals are inclusive of 34,670,420 and 16,577,495 shares, respectively, held by PGT, a consolidated VIE.
Schedule of Assumptions Used	The Company determined the fair value of the outstanding Series E-1 preferred stock warrants utilizing the following assumptions as of December 31, 2022 and 2021: December 31, 2022 2021 Volatility 72.0 % 63.0 % Risk-free interest rate 4.30 % 0.90 % Expected term (in years) 2.75 2.75 Dividend yield — % — % The Company determined the fair value of the outstanding Series F Warrants utilizing the following assumptions as of December 31, 2022 and 2021: December 31, 2022 2021 Volatility 72.00 % 63.0 % Risk-free interest rate 4.30 % 0.90 % Expected term (in years) 2.75 2.75 Dividend yield — % — %

STOCK-BASED COMPENSATION (Table

STOCK-BASED COMPENSATION (Tables)	12 Months Ended
	Dec. 31, 2022
Share-Based Payment Arrangement [Abstract]
Schedule of Summarized Option Activity under Option Plan	Stock option activity under the 2005 Plan and 2015 Plan is summarized for the year ended December 31, 2022 below: Options Issued and Outstanding Weighted- Average Exercise Price Weighted-Average Contractual Term (in years) Aggregate intrinsic value 1 (in thousands) Balance as of January 1, 2022 72,186,151 $ 0.07 6.72 $ 46,458 Options granted 17,713,281 $ 0.59 Options exercised (2,133,921) $ 0.03 Options forfeited (10,031,923) $ 0.49 Option expirations (5,825) $ 0.02 Balance as of December 31, 2022 77,727,763 $ 0.13 6.22 $ 19,450 Options vested and expected to vest as of December 31, 2022 70,664,163 $ 0.13 6.22 $ 18,733 Options vested and exercisable at December 31, 2022 55,063,268 $ 0.04 5.14 $ 17,149 1. Aggregate intrinsic value represents the excess of the fair value of our Common Stock as of December 31, 2022 over the exercise price of the outstanding in-the-money options.
Schedule of Weighted Average Grant Date Fair Value of Options Granted	Additional information pertaining to PMI's Common Stock option activities is as follows: Year ended December 31, 2022 2021 2020 Weighted-average grant date fair value of options granted (per share) $ 0.37 $ 0.13 $ 0.04
Schedule of Fair Value of Stock Option Awards	The fair value of PMI’s stock option awards granted during the years ended December 31, 2022, 2021 and 2020 was estimated at the date of grant using the Black-Scholes model with the following weighted average assumptions: December 31, 2022 2021 2020 Volatility of common stock 67.19 % 64.22 % 52.62 % Risk-free interest rate 2.95 % 1.02 % 0.51 % Expected life 6.0 years 6.0 years 6.0 years Dividend yield — % — % — %
Schedule of Summarized Activities for RSU's	The following table summarizes the number of PMI’s RSU activity for the year ended December 31, 2022: Number of Shares Weighted-Average Grant Date Fair Value Unvested at January 1, 2022 2,874,348 $ 1.14 Forfeited (33,960) $ 2.18 Expired (238,005) $ 2.14 Unvested at December 31, 2022 2,602,383 $ 1.04
Schedule of Stock Based Compensation Included in Consolidated Statements of Operations	The following table presents the amount of stock-based compensation related to stock-based awards granted to employees recognized in the Company’s Consolidated Statements of Operations for the periods presented (in thousands): Years Ended December 31, 2022 2021 2020 Origination and Servicing $ 134 $ 123 $ 35 Sales and Marketing 118 62 69 General and Administrative 1,074 951 1,809 Total Stock-Based Compensation $ 1,326 $ 1,136 $ 1,913

INCOME TAXES (Tables)

INCOME TAXES (Tables)	12 Months Ended
	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Schedule of Components of Income Tax	The components of the Company’s Income Tax Expense are as follows for the periods presented (in thousands): Years Ended December 31, 2022 2021 2020 Current: Federal $ — $ — $ — State 197 — — Foreign — — — Total Current Income Tax Expense (Benefit) 197 — — Deferred: Federal 47 47 47 State 51 24 38 Foreign — — (69) Total Deferred Income Tax Expense 98 71 16 Total Income Tax Expense $ 295 $ 71 $ 16
Schedule of Effective Income Tax Reconciliation	Income Tax Expense differed from the amount computed by applying the U.S. federal income tax rate of 21% to pretax income (loss) as a result of the following for the periods presented: Years Ended December 31, 2022 2021 2020 Federal tax at statutory rate 21 % 21 % 21 % State tax at statutory rate (net of federal benefit) 6 % 8 % 8 % Incentive stock options 1 % (5) % 2 % Preferred Stock Warrants (36) % (29) % (64) % Change in valuation allowance 15 % 6 % 37 % Return-to-provision (2) % — % — % State tax rate changes (5) % — % — % Other — % (1) % (4) % Income Tax Expense — % — % — %
Schedule of Deferred Tax Assets and Liabilities	Temporary items that give rise to significant portions of deferred tax assets and liabilities are as follows for the periods presented (in thousands): December 31, 2022 2021 Net operating loss carry forwards $ 85,330 $ 91,793 Research and other credits 3,438 307 Stock compensation 4,025 4,272 Accrued liabilities 5,159 4,357 Lease liabilities 4,798 3,266 Property and equipment 1,214 — Section 174 R&D capitalization 11,204 — Total deferred tax assets 115,168 103,995 Net servicing rights (2,040) (1,898) Property and equipment — (1,873) Intangible assets (2,129) (1,770) Right-of-use assets (4,147) (2,264) Total deferred tax liabilities (8,316) (7,805) Total net deferred tax asset 106,852 96,190 Less: Valuation allowance (107,512) (96,750) Net deferred tax liability $ (660) $ (560)
Schedule of Unrecognized Tax Benefits	The following table summarizes Prosper’s activity related to its unrecognized tax benefits (in thousands): Balance at December 31, 2019 $ 112 Change related to 2020 tax year position — Balance at December 31, 2020 $ 112 Change related to 2021 tax year position — Balance at December 31, 2021 $ 112 Increase related to prior year tax position 1,179 Balance at December 31, 2022 $ 1,291

LEASES (Tables)

LEASES (Tables)	12 Months Ended
	Dec. 31, 2022
Leases [Abstract]
Schedule of Right-of-use Assets	The following table summarizes the operating lease ROU assets as of December 31, 2022 , which are included in Property and Equipment, Net on the Consolidated Balance Sheets . December 31, 2022 Gross Carrying Value Accumulated Amortization Net Carrying Value ROU assets - office buildings $ 26,151 $ 12,215 $ 13,936 ROU assets - other 900 704 196 Total operating lease ROU assets $ 27,051 $ 12,919 $ 14,132
Schedule of Maturity of Lease Liabilities	Future maturities of operating lease liabilities as of December 31, 2022 were as follows (in thousands). The present value of the future minimum lease payments represents the Company’s operating lease liabilities as of December 31, 2022 and are included in “ Other Liabilities” December 31, 2022 2023 $ 3,715 2024 4,391 2025 4,517 2026 4,432 2027 3,311 Thereafter 1,411 Total future minimum lease payments 21,777 Less: Imputed interest (5,426) Present value of future minimum lease payments $ 16,351
Schedule of Supplemental Cash Flow Information	Supplemental cash flow information related to the Company’s operating leases is as follows (dollars in thousands): Years Ended December 31, 2022 2021 2020 Non-cash operating activity: ROU assets obtained or adjusted in exchange for new, amended and modified operating lease liabilities $ 9,980 $ 1,773 $ 290
Schedule of Value Used In Determining Present Value of Leases	The weighted-average remaining lease term and discount rate used in the calculation of the Company’s operating lease assets and liabilities are as follows (dollars in thousands): December 31, 2022 Weighted-average remaining lease term 4.88 years Weighted-average discount rate 10.96 %

RELATED PARTIES (Tables)

RELATED PARTIES (Tables)	12 Months Ended
	Dec. 31, 2022
Entity Information [Line Items]
Schedule of Aggregate Amount of Notes Purchased and the Income Earned	The aggregate amount of the Notes purchased and the income earned by parties deemed to be affiliates and related parties of Prosper for the year ended December 31, 2022 and 2021, as well as the Notes outstanding as of December 31, 2022 and 2021 are summarized below (in thousands): Aggregate Amount of Notes Purchased for the Year Ended December 31, Interest Earned on Notes for the Year Ended December 31, 2022 2021 2022 2021 Executive officers and management $ 37 $ 35 $ 7 $ 7 Directors (excluding executive officers and management) — 24 1 1 Total $ 37 $ 59 $ 8 $ 8 Notes Balance as of December 31, 2022 December 31, 2021 Executive officers and management $ 52 $ 41 Directors (excluding executive officers and management) 6 15 Total $ 58 $ 56
Prosper Funding LLC
Entity Information [Line Items]
Schedule of Aggregate Amount of Notes Purchased and the Income Earned	The aggregate amount of the Notes purchased and the income earned by parties deemed to be related parties of PFL for the years ended December 31, 2022 and 2021 are summarized below (in thousands): Aggregate Amount of Notes Purchased for the Year Ended December 31, Interest Earned on Notes for the Year Ended December 31, 2022 2021 2022 2021 Executive officers and management $ 34 $ 35 $ 7 $ 7 Directors (excluding executive officers and management) — — — — Total $ 34 $ 35 $ 7 $ 7 The balance of Notes held by officers and directors who are not executive officers are as follows (in thousands): Notes Balance as of December 31, 2022 December 31, 2021 Executive officers and management $ 45 $ 41 Directors (excluding executive officers and management) — — Total $ 45 $ 41

SEGMENTS (Tables)

SEGMENTS (Tables)	12 Months Ended
	Dec. 31, 2022
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	The tables below present segment information reconciled to total Company Net Income (Loss) Before Income Taxes, as well as interest income and expense included in segment Adjusted EBITDA, for the periods indicated (in thousands). Year Ended December 31, 2022 Personal Loan Home Equity Credit Card Total Total Net Revenue $ 180,717 $ 2,821 $ 16,343 $ 199,881 Segment Adjusted EBITDA $ 2,053 $ (2,163) $ (8,946) $ (9,056) Depreciation expense: Origination and Servicing (8,132) General and Administrative (2,656) Amortization of intangibles (136) Stock-based compensation (1,326) Change in Fair Value of Convertible Preferred Stock Warrants 84,595 Gain on Forgiveness of PPP Loan 8,604 Interest income on cash and cash equivalents 511 Interest Expense on Term Loan (1,527) Net Income Before Income Taxes $ 70,877 Interest Income (Expense) Included in Segment Adjusted EBITDA Interest Income on Borrower Loans and Loans Held for Sale $ 86,350 $ — $ — $ 86,350 Interest Expense on Notes and Warehouse Lines (60,025) — — (60,025) Total Interest Income, Net $ 26,325 $ — $ — $ 26,325 Year Ended December 31, 2021 Personal Loan Home Equity Credit Card Total Total Net Revenue $ 143,670 $ 946 $ 10 $ 144,626 Segment Adjusted EBITDA $ 19,219 $ (2,556) $ (3,849) $ 12,814 Depreciation expense: Origination and Servicing (7,167) General and Administrative (2,501) Amortization of intangibles (172) Stock-based compensation (1,136) Change in Fair Value of Convertible Preferred Stock Warrants (138,622) Loss on Deconsolidation of VIEs (1,494) Interest income on cash and cash equivalents 8 Net Loss Before Income Taxes $ (138,270) Interest Income (Expense) Included in Segment Adjusted EBITDA Interest Income on Borrower Loans and Loans Held for Sale $ 83,107 $ — $ — $ 83,107 Interest Expense on Financial Instruments (50,816) — — (50,816) Total Interest Income, Net $ 32,291 $ — $ — $ 32,291 Because the Company’s Credit Card product launched in December 2021, all activity for the year ended December 31, 2020 related to the Personal Loan and Home Equity segments. Year Ended December 31, 2020 Personal Loan Home Equity Total Total Net Revenue $ 102,979 $ 257 $ 103,236 Segment Adjusted EBITDA $ (5,106) $ (3,481) $ (8,587) Depreciation expense: Organization and Servicing (5,830) General and Administrative (2,300) Amortization of intangibles (219) Impairment Expenses (445) Stock-based compensation (1,913) Change in Fair Value of Convertible Preferred Stock Warrants 37,677 Interest income on cash and cash equivalents 184 Net Income Before Income Taxes $ 18,567 Interest Income (Expense) Included in Segment Adjusted EBITDA Interest Income on Borrower Loans and Loans Held for Sale $ 104,150 $ — $ 104,150 Interest Expense on Financial Instruments (60,127) — (60,127) Total Interest Income, Net $ 44,023 $ — $ 44,023

ORGANIZATION AND BUSINESS (Deta

ORGANIZATION AND BUSINESS (Details)	12 Months Ended
	Dec. 31, 2022 state
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Percentage of notes allowed for investors to purchase	100%
Number of states and district marketplace is open to investors	30
Additional number of states and district marketplace is open to borrowers	48
Prosper Funding LLC
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Percentage of notes allowed for investors to purchase	100%
Number of states and district marketplace is open to investors	30
Additional number of states and district marketplace is open to borrowers	48

SUMMARY OF SIGNIFICANT ACCOUN_4

SUMMARY OF SIGNIFICANT ACCOUNT POLICIES - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Entity Information [Line Items]
Servicing fee, percent	1%
Goodwill impairment expense	$ 0	$ 0	$ 0
Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Change in Fair Value of Convertible Preferred Stock Warrants	Change in Fair Value of Convertible Preferred Stock Warrants
Servicing fee percentage	1%
Advertising costs	$ 15,000,000	$ 6,100,000	$ 6,800,000
Prosper Funding LLC
Entity Information [Line Items]
Servicing fee, percent	1%
Minimum
Entity Information [Line Items]
Transaction fee percentage	1%
Maximum
Entity Information [Line Items]
Transaction fee percentage	5%
User base and customer relationships
Entity Information [Line Items]
Remaining Useful Life (In Years)	2 years 3 months 18 days	3 years 3 months 18 days
User base and customer relationships | Minimum
Entity Information [Line Items]
Remaining Useful Life (In Years)	3 years
User base and customer relationships | Maximum
Entity Information [Line Items]
Remaining Useful Life (In Years)	10 years
Developed technology | Minimum
Entity Information [Line Items]
Remaining Useful Life (In Years)	3 years
Developed technology | Maximum
Entity Information [Line Items]
Remaining Useful Life (In Years)	5 years
Brand name
Entity Information [Line Items]
Remaining Useful Life (In Years)	1 year
Borrower Loans
Entity Information [Line Items]
Servicing fee, percent	1%
Loan trailing fee, percent	0.075%
Borrower Loans | Prosper Funding LLC
Entity Information [Line Items]
Servicing fee, percent	1%
Loan trailing fee, percent	0.075%

SUMMARY OF SIGNIFICANT ACCOUN_5

SUMMARY OF SIGNIFICANT ACCOUNT POLICIES - Estimated Useful Lives of Assets (Details)	12 Months Ended
	Dec. 31, 2022
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful life	7 years
Office equipment
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful life	5 years
Computers and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful life	3 years
Leasehold improvements | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful life	5 years
Leasehold improvements | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful life	8 years
Internal-use software and website development costs | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful life	1 year
Internal-use software and website development costs | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful life	5 years
Prosper Funding LLC | Internal-use software and website development costs | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful life	1 year
Prosper Funding LLC | Internal-use software and website development costs | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful life	5 years

PROPERTY AND EQUIPMENT, NET - S

PROPERTY AND EQUIPMENT, NET - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Property and equipment	$ 106,157	$ 89,743
Less: Accumulated depreciation and amortization	(67,343)	(60,029)
Total Property and Equipment, Net	38,814	29,714
Prosper Funding LLC
Property, Plant and Equipment [Line Items]
Less: Accumulated depreciation and amortization	(27,424)	(24,072)
Total Property and Equipment, Net	10,004	7,907
Internal-use software and website development costs
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	49,818	41,816
Internal-use software and website development costs | Prosper Funding LLC
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	37,428	31,979
Operating lease right-of-use assets
Property, Plant and Equipment [Line Items]
Operating lease right-of-use assets	27,051	17,485
Computer equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	13,444	15,090
Office equipment and furniture
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	2,810	2,961
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	7,157	7,167
Assets not yet placed in service
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 5,877	$ 5,224

PROPERTY AND EQUIPMENT, NET - A

PROPERTY AND EQUIPMENT, NET - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Depreciation and Amortization	$ 10,924	$ 9,839	$ 8,349
Prosper Funding LLC
Property, Plant and Equipment [Line Items]
Depreciation and Amortization	5,525	4,878	4,149
Property and Equipment
Property, Plant and Equipment [Line Items]
Depreciation and Amortization	10,800	9,700	8,100
Internal-use software and website development costs
Property, Plant and Equipment [Line Items]
Capitalized internal-use software and website development costs	11,000	9,800	8,300
Internal-use software and website development costs | Prosper Funding LLC
Property, Plant and Equipment [Line Items]
Capitalized internal-use software and website development costs	$ 7,600	$ 5,900	$ 3,500

BORROWER LOANS, LOANS HELD FO_3

BORROWER LOANS, LOANS HELD FOR SALE AND NOTES, AT FAIR VALUE - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total Interest Income, Net	$ 26,325	$ 32,291	$ 44,023
Prosper Funding LLC
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total Interest Income, Net	$ 3,124	$ 2,438	$ 2,308
Borrower Loans
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Maturity term one, in months	24 months
Maturity term two, in months	36 months
Maturity term three, in months	48 months
Maturity term four, in months	60 months
Fixed interest rate, minimum	5.31%	5.31%
Fixed interest rate, maximum	33%	31.82%
Minimum number of days for which loans originated were delinquent	90 days	90 days
Fair value of loans originated	$ 300	$ 100
Non accrual status past due date		120 days
Loans in non-accrual status	$ 300	$ 100
Borrower Loans | Prosper Funding LLC
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Maturity term one, in months	24 months
Maturity term two, in months	36 months
Maturity term three, in months	48 months
Maturity term four, in months	60 months
Fixed interest rate, minimum	5.31%	5.31%
Fixed interest rate, maximum	33%	31.82%
Minimum number of days for which loans originated were delinquent	90 days	90 days
Fair value of loans originated	$ 300	$ 100
Loans in non-accrual status	300	100
Borrower Loans | Financing Receivables, Equal to Greater than 90 Days Past Due
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Aggregate principal amount	2,700	900
Borrower Loans | Financing Receivables, Equal to Greater than 90 Days Past Due | Prosper Funding LLC
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Aggregate principal amount	$ 2,700	$ 900
Borrower Loans | Minimum
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Maturity, in months		36 months
Borrower Loans | Minimum | Prosper Funding LLC
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Maturity, in months		36 months
Borrower Loans | Maximum
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Maturity, in months		60 months
Borrower Loans | Maximum | Prosper Funding LLC
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Maturity, in months		60 months
Loans Held for Sale
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Maturity term one, in months	24 months
Maturity term two, in months	36 months
Maturity term three, in months	48 months
Maturity term four, in months	60 months
Fixed interest rate, minimum	5.31%	5.31%
Fixed interest rate, maximum	33%	31.82%
Aggregate principal amount		$ 800
Fair value of loans originated	$ 200	$ 100
Non accrual status past due date		120 days
Loans in non-accrual status	200	$ 100
Total Interest Income, Net	$ 41,000	$ 32,600
Minimum number of days for which loans held for sale were delinquent	90 days	90 days
Loans Held for Sale | Prosper Funding LLC
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Non accrual status past due date		120 days
Loans Held for Sale | Financing Receivables, Equal to Greater than 90 Days Past Due
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Aggregate principal amount	$ 2,100
Loans Held for Sale | Minimum
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Maturity, in months		36 months
Loans Held for Sale | Maximum
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Maturity, in months		60 months

BORROWER LOANS, LOANS HELD FO_4

BORROWER LOANS, LOANS HELD FOR SALE AND NOTES, AT FAIR VALUE - Fair Value of Borrower Loans and Notes (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Borrower Loans, at Fair Value	[1]	$ 320,642	$ 267,626
Loans Held for Sale, at Fair Value	[1]	499,765	243,170
Notes, at Fair Value		318,704	265,985
Prosper Funding LLC
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Borrower Loans, at Fair Value		320,642	267,626
Notes, at Fair Value		318,704	265,985
Notes
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Notes, Aggregate principal balance outstanding		336,555	267,415
Notes, Fair value adjustments		(17,851)	(1,430)
Notes, at Fair Value		318,704	265,985
Notes | Prosper Funding LLC
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Notes, Aggregate principal balance outstanding		336,555	267,415
Notes, Fair value adjustments		(17,851)	(1,430)
Notes, at Fair Value		318,704	265,985
Borrower Loans
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Borrower Loans, Aggregate principal balance outstanding		333,294	265,232
Fair value adjustments		(12,652)	2,394
Borrower Loans, at Fair Value		320,642	267,626
Borrower Loans | Prosper Funding LLC
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Borrower Loans, Aggregate principal balance outstanding		333,294	265,232
Fair value adjustments		(12,652)	2,394
Borrower Loans, at Fair Value		320,642	267,626
Loans Held for Sale
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Loans Held for Sale, Aggregate principal balance outstanding		512,076	242,278
Fair value adjustments		(12,311)	892
Loans Held for Sale, at Fair Value		$ 499,765	$ 243,170
[1](1) Includes amounts in consolidated variable interest entities (VIEs) presented separately in the table below.

CREDIT CARD (Details)

CREDIT CARD (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Derivative [Line Items]
Credit Card Derivative	$ 10,782	$ 7
Various fees and charges	$ 7,000
Servicing fee percentage	1%
Credit Card servicing obligation liability (Note 5)	$ 3,500	$ 0
Change in fair value of servicing liability	3,700
Credit Card Derivative (Note 5)
Derivative [Line Items]
Revenue earned	9,800
Gain on settled transactions	4,300
Credit Card Derivative	$ 10,800

SERVICING ASSETS (Details)

SERVICING ASSETS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Servicing Assets And Liabilities Fair Value [Line Items]
Gain on Sale of Borrower Loans	$ (1,039)	$ 7,196	$ 4,816
Servicing Assets
Servicing Assets And Liabilities Fair Value [Line Items]
Outstanding principal	$ 3,200,000	$ 2,300,000
Maturity term one, in months	24 months
Maturity term two, in months	36 months
Maturity term three, in months	48 months
Maturity term four, in months	60 months
Fixed interest rate, minimum	5.31%	5.31%
Fixed interest rate, maximum	33%	31.82%
Contractually specified servicing fees, late charges and ancillary fees	$ 28,900	$ 24,800	28,900
Servicing Assets | Minimum
Servicing Assets And Liabilities Fair Value [Line Items]
Maturity, in months		36 months
Servicing Assets | Maximum
Servicing Assets And Liabilities Fair Value [Line Items]
Maturity, in months		60 months
Prosper Funding LLC
Servicing Assets And Liabilities Fair Value [Line Items]
Gain on Sale of Borrower Loans	1,678	$ 8,450	6,430
Prosper Funding LLC | Servicing Assets
Servicing Assets And Liabilities Fair Value [Line Items]
Outstanding principal	$ 3,700,000	$ 2,500,000
Fixed interest rate, minimum	5.31%	5.31%
Fixed interest rate, maximum	33%	31.82%
Contractually specified servicing fees, late charges and ancillary fees	$ 33,800	$ 29,200	$ 34,800
Prosper Funding LLC | Servicing Assets | Minimum
Servicing Assets And Liabilities Fair Value [Line Items]
Maturity, in months		36 months
Maturity term one, in months	24 months
Maturity term two, in months	36 months
Maturity term three, in months	48 months
Prosper Funding LLC | Servicing Assets | Maximum
Servicing Assets And Liabilities Fair Value [Line Items]
Maturity, in months		60 months
Maturity term four, in months		60 months

FAIR VALUE OF ASSETS AND LIAB_3

FAIR VALUE OF ASSETS AND LIABILITIES - Fair Value Hierarchy (Details) - USD ($) $ in Thousands		Dec. 31, 2022	Dec. 31, 2021
Assets:
Borrower Loans, at Fair Value	[1]	$ 320,642	$ 267,626
Loans Held for Sale, at Fair Value	[1]	499,765	243,170
Prepaid and Other Assets, Fair Value Disclosure		1,289	66
Servicing Assets		12,562	8,761
Credit Card Derivative		10,782	7
Total Assets		845,040	519,623
Liabilities:
Notes, at Fair Value		318,704	265,985
Convertible Preferred Stock Warrant Liability		166,346	250,941
Loan Trailing Fee Liability (Note 9)		3,290	2,161
Credit Card servicing obligation liability (Note 5)		3,720
Total Liabilities		492,060	519,087
Prosper Funding LLC
Assets:
Borrower Loans, at Fair Value		320,642	267,626
Servicing Assets		14,860	9,796
Total Assets		335,502	277,422
Liabilities:
Notes, at Fair Value		318,704	265,985
Loan Trailing Fee Liability (Note 9)		3,290	2,161
Total Liabilities		321,994	268,146
Level 1 Inputs
Assets:
Borrower Loans, at Fair Value		0	0
Loans Held for Sale, at Fair Value		0	0
Prepaid and Other Assets, Fair Value Disclosure		0	0
Servicing Assets		0	0
Credit Card Derivative		0
Total Assets		0	0
Liabilities:
Notes, at Fair Value		0	0
Convertible Preferred Stock Warrant Liability		0	0
Loan Trailing Fee Liability (Note 9)		0	0
Credit Card servicing obligation liability (Note 5)		0
Total Liabilities		0	0
Level 1 Inputs | Prosper Funding LLC
Assets:
Borrower Loans, at Fair Value		0	0
Servicing Assets		0	0
Total Assets		0	0
Liabilities:
Notes, at Fair Value		0	0
Loan Trailing Fee Liability (Note 9)		0	0
Total Liabilities		0	0
Level 2 Inputs
Assets:
Borrower Loans, at Fair Value		0	0
Loans Held for Sale, at Fair Value		0	0
Prepaid and Other Assets, Fair Value Disclosure		1,289	66
Servicing Assets		0	0
Credit Card Derivative		0
Total Assets		1,289	66
Liabilities:
Notes, at Fair Value		0	0
Convertible Preferred Stock Warrant Liability		0	0
Loan Trailing Fee Liability (Note 9)		0	0
Credit Card servicing obligation liability (Note 5)		0
Total Liabilities		0	0
Level 2 Inputs | Prosper Funding LLC
Assets:
Borrower Loans, at Fair Value		0	0
Servicing Assets		0	0
Total Assets		0	0
Liabilities:
Notes, at Fair Value		0	0
Loan Trailing Fee Liability (Note 9)		0	0
Total Liabilities		0	0
Level 3 Inputs
Assets:
Borrower Loans, at Fair Value		320,642	267,626
Loans Held for Sale, at Fair Value		499,765	243,170
Prepaid and Other Assets, Fair Value Disclosure		0	0
Servicing Assets		12,562	8,761
Credit Card Derivative		10,782
Total Assets		843,751	519,557
Liabilities:
Notes, at Fair Value		318,704	265,985
Convertible Preferred Stock Warrant Liability		166,346	250,941
Loan Trailing Fee Liability (Note 9)		3,290	2,161
Credit Card servicing obligation liability (Note 5)		3,720
Total Liabilities		492,060	519,087
Level 3 Inputs | Prosper Funding LLC
Assets:
Borrower Loans, at Fair Value		320,642	267,626
Servicing Assets		14,860	9,796
Total Assets		335,502	277,422
Liabilities:
Notes, at Fair Value		318,704	265,985
Loan Trailing Fee Liability (Note 9)		3,290	2,161
Total Liabilities		$ 321,994	$ 268,146
[1](1) Includes amounts in consolidated variable interest entities (VIEs) presented separately in the table below.

FAIR VALUE OF ASSETS AND LIAB_4

FAIR VALUE OF ASSETS AND LIABILITIES - Significant Unobservable Inputs (Details)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Servicing Assets:
Market rate for collection fee	0.06%	0.06%
Prosper Funding LLC
Servicing Assets:
Market servicing rate		0.648%
Market rate for collection fee	0.06%	0.06%
Weighted average market servicing rate		0.708%
Minimum
Servicing Assets:
Discount rate	15%	15%
Default rate	2%	1.50%
Prepayment rate	14.20%	10.20%
Market servicing rate	0.648%	0.648%
Weighted average market servicing rate		0.708%
Minimum | Prosper Funding LLC
Servicing Assets:
Discount rate	15%	15%
Default rate	2%	1.50%
Prepayment rate	14.20%	10.20%
Market servicing rate	0.648%
Weighted average market servicing rate	0.708%
Maximum
Servicing Assets:
Discount rate	25%	25%
Default rate	19.30%	14.10%
Prepayment rate	28%	32.30%
Market servicing rate	0.842%	0.842%
Weighted average market servicing rate		0.902%
Maximum | Prosper Funding LLC
Servicing Assets:
Discount rate	25%	25%
Default rate	19.30%	14.10%
Prepayment rate	28%	32.30%
Market servicing rate	0.842%	0.842%
Weighted average market servicing rate	0.902%	0.902%
Discount rate | Minimum
Borrower Loans, Loans Held for Sale, and Notes:
Fair value assumptions	0.054	0.042
Loan Trailing Fee Liability:
Fair value assumptions	0.054	0.042
Discount rate | Minimum | Loan trailing fee liability
Borrower Loans, Loans Held for Sale, and Notes:
Fair value assumptions	0.150	0.150
Loan Trailing Fee Liability:
Fair value assumptions	0.150	0.150
Discount rate | Minimum | Prosper Funding LLC
Borrower Loans, Loans Held for Sale, and Notes:
Fair value assumptions	0.056	0.043
Loan Trailing Fee Liability:
Fair value assumptions	0.056	0.043
Discount rate | Minimum | Prosper Funding LLC | Loan trailing fee liability
Borrower Loans, Loans Held for Sale, and Notes:
Fair value assumptions	0.150	0.150
Loan Trailing Fee Liability:
Fair value assumptions	0.150	0.150
Discount rate | Maximum
Borrower Loans, Loans Held for Sale, and Notes:
Fair value assumptions	0.132	0.143
Loan Trailing Fee Liability:
Fair value assumptions	0.132	0.143
Discount rate | Maximum | Loan trailing fee liability
Borrower Loans, Loans Held for Sale, and Notes:
Fair value assumptions	0.250	0.250
Loan Trailing Fee Liability:
Fair value assumptions	0.250	0.250
Discount rate | Maximum | Prosper Funding LLC
Borrower Loans, Loans Held for Sale, and Notes:
Fair value assumptions	0.129	0.139
Loan Trailing Fee Liability:
Fair value assumptions	0.129	0.139
Discount rate | Maximum | Prosper Funding LLC | Loan trailing fee liability
Borrower Loans, Loans Held for Sale, and Notes:
Fair value assumptions	0.250	0.250
Loan Trailing Fee Liability:
Fair value assumptions	0.250	0.250
Default rate | Minimum
Borrower Loans, Loans Held for Sale, and Notes:
Fair value assumptions	0.018	0.020
Loan Trailing Fee Liability:
Fair value assumptions	0.018	0.020
Default rate | Minimum | Loan trailing fee liability
Borrower Loans, Loans Held for Sale, and Notes:
Fair value assumptions	0.020	0.015
Loan Trailing Fee Liability:
Fair value assumptions	0.020	0.015
Default rate | Minimum | Prosper Funding LLC
Borrower Loans, Loans Held for Sale, and Notes:
Fair value assumptions	0.018	0.020
Loan Trailing Fee Liability:
Fair value assumptions	0.018	0.020
Default rate | Minimum | Prosper Funding LLC | Loan trailing fee liability
Borrower Loans, Loans Held for Sale, and Notes:
Fair value assumptions	0.020	0.015
Loan Trailing Fee Liability:
Fair value assumptions	0.020	0.015
Default rate | Maximum
Borrower Loans, Loans Held for Sale, and Notes:
Fair value assumptions	0.187	0.141
Loan Trailing Fee Liability:
Fair value assumptions	0.187	0.141
Default rate | Maximum | Loan trailing fee liability
Borrower Loans, Loans Held for Sale, and Notes:
Fair value assumptions	0.193	0.141
Loan Trailing Fee Liability:
Fair value assumptions	0.193	0.141
Default rate | Maximum | Prosper Funding LLC
Borrower Loans, Loans Held for Sale, and Notes:
Fair value assumptions	0.182	0.135
Loan Trailing Fee Liability:
Fair value assumptions	0.182	0.135
Default rate | Maximum | Prosper Funding LLC | Loan trailing fee liability
Borrower Loans, Loans Held for Sale, and Notes:
Fair value assumptions	0.193	0.141
Loan Trailing Fee Liability:
Fair value assumptions	0.193	0.141
Prepayment rate | Minimum | Loan trailing fee liability
Borrower Loans, Loans Held for Sale, and Notes:
Fair value assumptions	0.142	0.102
Loan Trailing Fee Liability:
Fair value assumptions	0.142	0.102
Prepayment rate | Minimum | Prosper Funding LLC | Loan trailing fee liability
Borrower Loans, Loans Held for Sale, and Notes:
Fair value assumptions	0.142	0.102
Loan Trailing Fee Liability:
Fair value assumptions	0.142	0.102
Prepayment rate | Maximum | Loan trailing fee liability
Borrower Loans, Loans Held for Sale, and Notes:
Fair value assumptions	0.280	0.323
Loan Trailing Fee Liability:
Fair value assumptions	0.280	0.323
Prepayment rate | Maximum | Prosper Funding LLC | Loan trailing fee liability
Borrower Loans, Loans Held for Sale, and Notes:
Fair value assumptions	0.280	0.323
Loan Trailing Fee Liability:
Fair value assumptions	0.280	0.323

FAIR VALUE OF ASSETS AND LIAB_5

FAIR VALUE OF ASSETS AND LIABILITIES - Summary of Changes in Level 3 Fair Value Assets and Liabilities (Details) - Recurring - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Total
Beginning balance	$ 244,811	$ 421,588
Purchase of Borrower Loans/Issuance of Notes	3,063,535	1,712,772
Principal repayments	(169,381)	(237,670)
Borrower Loans sold to third parties	(2,614,401)	(1,582,828)
Other changes	1,712	(1,487)
Change in fair value	(24,573)	(3,183)
Deconsolidation of VIEs		(64,381)
Ending balance	501,703	244,811
Prosper Funding LLC
Total
Beginning balance	1,641	1,291
Purchase of Borrower Loans/Issuance of Notes	3,063,535	1,712,772
Principal repayments	(14,709)	(964)
Borrower Loans sold to third parties	(3,078,249)	(1,714,127)
Other changes	92	29
Change in fair value	394	770
Ending balance	1,938	1,641
Notes
Liabilities
Beginning balance	(265,985)	(208,379)
Purchase of Borrower Loans/Issuance of Notes	(285,115)	(231,933)
Principal repayments	202,308	172,250
Borrower Loans sold to third parties	0	0
Other changes	(742)	167
Change in fair value	30,830	1,910
Deconsolidation of VIEs		0
Ending balance	(318,704)	(265,985)
Notes | Prosper Funding LLC
Liabilities
Beginning balance	(265,985)	(208,379)
Purchase of Borrower Loans/Issuance of Notes	(285,115)	(231,933)
Principal repayments	202,308	172,250
Borrower Loans sold to third parties	0	0
Other changes	742	(166)
Change in fair value	30,830	1,911
Ending balance	(318,704)	(265,985)
Certificates Issued by Securitization Trust
Liabilities
Beginning balance	0	(22,917)
Purchase of Borrower Loans/Issuance of Notes	0	0
Principal repayments	0	14,934
Borrower Loans sold to third parties	0	0
Other changes	0	113
Change in fair value	0	(6,110)
Deconsolidation of VIEs		13,980
Ending balance	0	0
Borrower Loans
Assets
Beginning balance, Assets	267,626	378,263
Purchase of Borrower Loans/Issuance of Notes	284,921	232,000
Principal repayments	(187,599)	(260,689)
Borrower Loans sold to third parties	(14,520)	(2,664)
Other changes	650	(1,518)
Change in fair value	(30,436)	595
Deconsolidation of VIEs (Note 6)		(78,361)
Ending balance, Assets	320,642	267,626
Borrower Loans | Prosper Funding LLC
Assets
Beginning balance, Assets	267,626	209,670
Purchase of Borrower Loans/Issuance of Notes	284,921	232,000
Principal repayments	(187,599)	(171,286)
Borrower Loans sold to third parties	(14,520)	(1,422)
Other changes	(650)	195
Change in fair value	(30,436)	(1,141)
Ending balance, Assets	320,642	267,626
Loans Held for Sale
Assets
Beginning balance, Assets	243,170	274,621
Purchase of Borrower Loans/Issuance of Notes	3,063,729	1,712,705
Principal repayments	(184,090)	(164,165)
Borrower Loans sold to third parties	(2,599,881)	(1,580,164)
Other changes	1,804	(249)
Change in fair value	(24,967)	422
Deconsolidation of VIEs (Note 6)		0
Ending balance, Assets	499,765	243,170
Loans Held for Sale | Prosper Funding LLC
Assets
Beginning balance, Assets	0	0
Purchase of Borrower Loans/Issuance of Notes	3,063,729	1,712,705
Principal repayments	0	0
Borrower Loans sold to third parties	(3,063,729)	(1,712,705)
Other changes	0	0
Change in fair value	0	0
Ending balance, Assets	$ 0	$ 0

FAIR VALUE OF ASSETS AND LIAB_6

FAIR VALUE OF ASSETS AND LIABILITIES - Schedule of Servicing Assets, Credit Card Derivative, and Convertible Preferred Stock Warrant Liability (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Servicing Assets
Beginning balance, fair value	$ 8,761
Ending balance, fair value	12,562	$ 8,761
Level 3 Inputs
Servicing Assets
Beginning balance, fair value	8,761
Ending balance, fair value	12,562	8,761
Level 3 Inputs | Mandatorily Redeemable Preferred Stock
Convertible Preferred Stock Warrant Liability
Beginning balance, fair value	250,941	112,319
Change in fair value	(84,595)	138,622
Ending balance, fair value	166,346	250,941
Level 3 Inputs | Credit Card Derivative (Note 5) | Derivative
Credit Card Derivative
Beginning balance, Assets	7	0
Change in fair value	9,784	7
Gains from settled transactions	4,295
Less: Net payments received	(3,304)
Ending balance, Assets	10,782	7
Level 3 Inputs | Credit Card Servicing Obligation Liability
Convertible Preferred Stock Warrant Liability
Beginning balance, fair value	0
Change in fair value	(3,720)
Ending balance, fair value	3,720	0
Prosper Funding LLC
Servicing Assets
Beginning balance, fair value	9,796
Ending balance, fair value	14,860	9,796
Prosper Funding LLC | Level 3 Inputs
Servicing Assets
Beginning balance, fair value	9,796
Ending balance, fair value	14,860	9,796
Servicing Assets
Servicing Assets
Beginning balance, fair value	8,761
Ending balance, fair value	12,562	8,761
Servicing Assets | Level 3 Inputs
Servicing Assets
Beginning balance, fair value	8,761	9,242
Additions	12,957	7,973
Recognition of Servicing Assets upon deconsolidation of VIEs		215
Less: Change in fair value	(9,156)	(8,669)
Ending balance, fair value	12,562	8,761
Servicing Assets | Prosper Funding LLC
Servicing Assets
Beginning balance, fair value	9,796
Ending balance, fair value	14,860	9,796
Servicing Assets | Prosper Funding LLC | Level 3 Inputs
Servicing Assets
Beginning balance, fair value	9,796	11,088
Additions	15,277	9,020
Less: Change in fair value	(10,213)	(10,312)
Ending balance, fair value	$ 14,860	$ 9,796

FAIR VALUE OF ASSETS AND LIAB_7

FAIR VALUE OF ASSETS AND LIABILITIES - Loan Trailing Fee Liability (Details) - Trailing Fee - Level 3 Inputs - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Liabilities
Beginning balance, fair value	$ 2,161	$ 2,233
Issuances	3,070	1,775
Cash payment of Loan Trailing Fee	(2,245)	(2,100)
Change in fair value	304	253
Ending balance, fair value	3,290	2,161
Prosper Funding LLC
Liabilities
Beginning balance, fair value	2,161	2,233
Issuances	3,070	1,775
Cash payment of Loan Trailing Fee	(2,245)	(2,100)
Change in fair value	304	253
Ending balance, fair value	$ 3,290	$ 2,161

FAIR VALUE OF ASSETS AND LIAB_8

FAIR VALUE OF ASSETS AND LIABILITIES - Assumptions for Borrower Loans, Loans Held for Sale and Notes (Details) $ in Thousands		Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Fair Value Inputs Assets Quantitative Information [Line Items]
Borrower Loans, at Fair Value	[1]	$ 320,642	$ 267,626
Notes, at Fair Value		318,704	265,985
Notes
Fair Value Inputs Assets Quantitative Information [Line Items]
Notes, at Fair Value		318,704	265,985
Prosper Funding LLC
Fair Value Inputs Assets Quantitative Information [Line Items]
Borrower Loans, at Fair Value		320,642	267,626
Notes, at Fair Value		318,704	265,985
Prosper Funding LLC | Notes
Fair Value Inputs Assets Quantitative Information [Line Items]
Notes, at Fair Value		318,704	265,985
Notes | Prosper Funding LLC | Notes
Fair Value Inputs Assets Quantitative Information [Line Items]
Notes, at Fair Value		318,704	265,985
Notes | Discount rate assumption | 100 basis point increase
Fair Value Inputs Assets Quantitative Information [Line Items]
Notes		315,456	263,326
Notes | Discount rate assumption | 100 basis point increase | Prosper Funding LLC
Fair Value Inputs Assets Quantitative Information [Line Items]
Notes		315,456	263,326
Notes | Discount rate assumption | 200 basis point increase
Fair Value Inputs Assets Quantitative Information [Line Items]
Notes		312,291	260,735
Notes | Discount rate assumption | 200 basis point increase | Prosper Funding LLC
Fair Value Inputs Assets Quantitative Information [Line Items]
Notes		312,291	260,735
Notes | Discount rate assumption | 100 basis point decrease
Fair Value Inputs Assets Quantitative Information [Line Items]
Notes		322,037	268,714
Notes | Discount rate assumption | 100 basis point decrease | Prosper Funding LLC
Fair Value Inputs Assets Quantitative Information [Line Items]
Notes		322,037	268,714
Notes | Discount rate assumption | 200 basis point decrease
Fair Value Inputs Assets Quantitative Information [Line Items]
Notes		325,461	271,516
Notes | Discount rate assumption | 200 basis point decrease | Prosper Funding LLC
Fair Value Inputs Assets Quantitative Information [Line Items]
Notes		325,461	271,516
Notes | Default rate assumption | Applying a 1.1 multiplier to default rate
Fair Value Inputs Assets Quantitative Information [Line Items]
Notes		314,892	263,644
Notes | Default rate assumption | Applying a 1.1 multiplier to default rate | Prosper Funding LLC
Fair Value Inputs Assets Quantitative Information [Line Items]
Notes		314,892	263,644
Notes | Default rate assumption | Applying a 1.2 multiplier to default rate
Fair Value Inputs Assets Quantitative Information [Line Items]
Notes		311,112	261,318
Notes | Default rate assumption | Applying a 1.2 multiplier to default rate | Prosper Funding LLC
Fair Value Inputs Assets Quantitative Information [Line Items]
Notes		311,112	261,318
Notes | Default rate assumption | Applying a 0.9 multiplier to default rate
Fair Value Inputs Assets Quantitative Information [Line Items]
Notes		322,547	268,340
Notes | Default rate assumption | Applying a 0.9 multiplier to default rate | Prosper Funding LLC
Fair Value Inputs Assets Quantitative Information [Line Items]
Notes		322,547	268,340
Notes | Default rate assumption | Applying a 0.8 multiplier to default rate
Fair Value Inputs Assets Quantitative Information [Line Items]
Notes		326,425	270,711
Notes | Default rate assumption | Applying a 0.8 multiplier to default rate | Prosper Funding LLC
Fair Value Inputs Assets Quantitative Information [Line Items]
Notes		326,425	270,711
Borrower Loans / Loans Held for Sale
Fair Value Inputs Assets Quantitative Information [Line Items]
Borrower Loans, at Fair Value		820,407	510,796
Borrower Loans / Loans Held for Sale | Discount rate assumption | 100 basis point increase
Fair Value Inputs Assets Quantitative Information [Line Items]
Borrower loans		812,061	505,732
Borrower Loans / Loans Held for Sale | Discount rate assumption | 100 basis point increase | Prosper Funding LLC
Fair Value Inputs Assets Quantitative Information [Line Items]
Borrower loans		317,380
Borrower Loans / Loans Held for Sale | Discount rate assumption | 200 basis point increase
Fair Value Inputs Assets Quantitative Information [Line Items]
Borrower loans		803,927	500,763
Borrower Loans / Loans Held for Sale | Discount rate assumption | 200 basis point increase | Prosper Funding LLC
Fair Value Inputs Assets Quantitative Information [Line Items]
Borrower loans		314,201
Borrower Loans / Loans Held for Sale | Discount rate assumption | 100 basis point decrease
Fair Value Inputs Assets Quantitative Information [Line Items]
Borrower loans		828,975	516,064
Borrower Loans / Loans Held for Sale | Discount rate assumption | 100 basis point decrease | Prosper Funding LLC
Fair Value Inputs Assets Quantitative Information [Line Items]
Borrower loans		323,991
Borrower Loans / Loans Held for Sale | Discount rate assumption | 200 basis point decrease
Fair Value Inputs Assets Quantitative Information [Line Items]
Borrower loans		837,773	521,437
Borrower Loans / Loans Held for Sale | Discount rate assumption | 200 basis point decrease | Prosper Funding LLC
Fair Value Inputs Assets Quantitative Information [Line Items]
Borrower loans		327,429
Borrower Loans / Loans Held for Sale | Default rate assumption | Applying a 1.1 multiplier to default rate
Fair Value Inputs Assets Quantitative Information [Line Items]
Borrower loans		810,657	506,362
Borrower Loans / Loans Held for Sale | Default rate assumption | Applying a 1.1 multiplier to default rate | Prosper Funding LLC
Fair Value Inputs Assets Quantitative Information [Line Items]
Borrower loans		316,832
Borrower Loans / Loans Held for Sale | Default rate assumption | Applying a 1.2 multiplier to default rate
Fair Value Inputs Assets Quantitative Information [Line Items]
Borrower loans		800,989	501,921
Borrower Loans / Loans Held for Sale | Default rate assumption | Applying a 1.2 multiplier to default rate | Prosper Funding LLC
Fair Value Inputs Assets Quantitative Information [Line Items]
Borrower loans		313,053
Borrower Loans / Loans Held for Sale | Default rate assumption | Applying a 0.9 multiplier to default rate
Fair Value Inputs Assets Quantitative Information [Line Items]
Borrower loans		830,238	515,326
Borrower Loans / Loans Held for Sale | Default rate assumption | Applying a 0.9 multiplier to default rate | Prosper Funding LLC
Fair Value Inputs Assets Quantitative Information [Line Items]
Borrower loans		324,484
Borrower Loans / Loans Held for Sale | Default rate assumption | Applying a 0.8 multiplier to default rate
Fair Value Inputs Assets Quantitative Information [Line Items]
Borrower loans		840,156	519,851
Borrower Loans / Loans Held for Sale | Default rate assumption | Applying a 0.8 multiplier to default rate | Prosper Funding LLC
Fair Value Inputs Assets Quantitative Information [Line Items]
Borrower loans		$ 328,361
Borrower Loans / Loans Held for Sale | Notes | Prosper Funding LLC
Fair Value Inputs Assets Quantitative Information [Line Items]
Borrower Loans, at Fair Value			267,626
Borrower Loans / Loans Held for Sale | Notes | Discount rate assumption | 100 basis point increase | Prosper Funding LLC
Fair Value Inputs Assets Quantitative Information [Line Items]
Borrower loans			265,104
Borrower Loans / Loans Held for Sale | Notes | Discount rate assumption | 200 basis point increase | Prosper Funding LLC
Fair Value Inputs Assets Quantitative Information [Line Items]
Borrower loans			262,499
Borrower Loans / Loans Held for Sale | Notes | Discount rate assumption | 100 basis point decrease | Prosper Funding LLC
Fair Value Inputs Assets Quantitative Information [Line Items]
Borrower loans			270,520
Borrower Loans / Loans Held for Sale | Notes | Discount rate assumption | 200 basis point decrease | Prosper Funding LLC
Fair Value Inputs Assets Quantitative Information [Line Items]
Borrower loans			273,337
Borrower Loans / Loans Held for Sale | Notes | Default rate assumption | Applying a 1.1 multiplier to default rate | Prosper Funding LLC
Fair Value Inputs Assets Quantitative Information [Line Items]
Borrower loans			265,435
Borrower Loans / Loans Held for Sale | Notes | Default rate assumption | Applying a 1.2 multiplier to default rate | Prosper Funding LLC
Fair Value Inputs Assets Quantitative Information [Line Items]
Borrower loans			263,107
Borrower Loans / Loans Held for Sale | Notes | Default rate assumption | Applying a 0.9 multiplier to default rate | Prosper Funding LLC
Fair Value Inputs Assets Quantitative Information [Line Items]
Borrower loans			270,133
Borrower Loans / Loans Held for Sale | Notes | Default rate assumption | Applying a 0.8 multiplier to default rate | Prosper Funding LLC
Fair Value Inputs Assets Quantitative Information [Line Items]
Borrower loans			$ 272,505
Discount rate | Notes | Discount rate assumption
Fair Value Inputs Assets Quantitative Information [Line Items]
Fair value assumptions		0.0687	0.0576
Discount rate | Notes | Discount rate assumption | Prosper Funding LLC
Fair Value Inputs Assets Quantitative Information [Line Items]
Fair value assumptions		0.0687	0.0576
Discount rate | Borrower Loans / Loans Held for Sale | Discount rate assumption
Fair Value Inputs Assets Quantitative Information [Line Items]
Fair value assumptions		0.0672	0.0564
Discount rate | Borrower Loans / Loans Held for Sale | Discount rate assumption | Prosper Funding LLC
Fair Value Inputs Assets Quantitative Information [Line Items]
Fair value assumptions		0.0687
Discount rate | Borrower Loans / Loans Held for Sale | Notes | Discount rate assumption | Prosper Funding LLC
Fair Value Inputs Assets Quantitative Information [Line Items]
Fair value assumptions			0.0576
Default rate | Notes | Default rate assumption
Fair Value Inputs Assets Quantitative Information [Line Items]
Fair value assumptions		0.1136	0.1070
Default rate | Notes | Default rate assumption | Prosper Funding LLC
Fair Value Inputs Assets Quantitative Information [Line Items]
Fair value assumptions		0.1136	0.1070
Default rate | Borrower Loans / Loans Held for Sale | Default rate assumption
Fair Value Inputs Assets Quantitative Information [Line Items]
Fair value assumptions		0.0931	0.1008
Default rate | Borrower Loans / Loans Held for Sale | Default rate assumption | Prosper Funding LLC
Fair Value Inputs Assets Quantitative Information [Line Items]
Fair value assumptions		0.1136
Default rate | Borrower Loans / Loans Held for Sale | Notes | Default rate assumption | Prosper Funding LLC
Fair Value Inputs Assets Quantitative Information [Line Items]
Fair value assumptions			0.1070
[1](1) Includes amounts in consolidated variable interest entities (VIEs) presented separately in the table below.

FAIR VALUE OF ASSETS AND LIAB_9

FAIR VALUE OF ASSETS AND LIABILITIES - Schedule Assumptions and the Sensitivity of the Fair Value (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Servicing Assets And Liabilities Fair Value [Line Items]
Servicing Assets	$ 12,562	$ 8,761
Servicing rate increase	0.025%
Servicing rate decrease	0.025%
Prepayment rate increase	110%
Prepayment rate decrease	90%
Default rate increase	110%
Default rate decrease	90%
Prosper Funding LLC
Servicing Assets And Liabilities Fair Value [Line Items]
Servicing Assets	$ 14,860	9,796
Servicing rate increase	0.025%
Servicing rate decrease	0.025%
Prepayment rate increase	1.10%
Prepayment rate decrease	0.90%
Default rate increase	1.10%
Default rate decrease	0.90%
Servicing Assets
Servicing Assets And Liabilities Fair Value [Line Items]
Servicing Assets	$ 12,562	8,761
Servicing Assets | Prosper Funding LLC
Servicing Assets And Liabilities Fair Value [Line Items]
Servicing Assets	14,860	9,796
Market servicing rate | Servicing Assets | Market servicing rate increase of 0.025%
Servicing Assets And Liabilities Fair Value [Line Items]
Expected fair value with change in assumptions	11,708	8,203
Market servicing rate | Servicing Assets | Market servicing rate increase of 0.025% | Prosper Funding LLC
Servicing Assets And Liabilities Fair Value [Line Items]
Expected fair value with change in assumptions	13,850	9,171
Market servicing rate | Servicing Assets | Market servicing rate decrease of 0.025%
Servicing Assets And Liabilities Fair Value [Line Items]
Expected fair value with change in assumptions	13,415	9,320
Market servicing rate | Servicing Assets | Market servicing rate decrease of 0.025% | Prosper Funding LLC
Servicing Assets And Liabilities Fair Value [Line Items]
Expected fair value with change in assumptions	15,870	10,421
Prepayment rate assumption | Servicing Assets | Applying a 1.1 multiplier to prepayment rate
Servicing Assets And Liabilities Fair Value [Line Items]
Expected fair value with change in assumptions	12,286	8,568
Prepayment rate assumption | Servicing Assets | Applying a 1.1 multiplier to prepayment rate | Prosper Funding LLC
Servicing Assets And Liabilities Fair Value [Line Items]
Expected fair value with change in assumptions	14,534	9,580
Prepayment rate assumption | Servicing Assets | Applying a 0.9 multiplier to prepayment rate
Servicing Assets And Liabilities Fair Value [Line Items]
Expected fair value with change in assumptions	12,842	8,957
Prepayment rate assumption | Servicing Assets | Applying a 0.9 multiplier to prepayment rate | Prosper Funding LLC
Servicing Assets And Liabilities Fair Value [Line Items]
Expected fair value with change in assumptions	15,191	10,015
Default rate assumption | Servicing Assets | Applying a 1.1 multiplier to default rate
Servicing Assets And Liabilities Fair Value [Line Items]
Expected fair value with change in assumptions	12,305	8,646
Default rate assumption | Servicing Assets | Applying a 1.1 multiplier to default rate | Prosper Funding LLC
Servicing Assets And Liabilities Fair Value [Line Items]
Expected fair value with change in assumptions	14,557	9,667
Default rate assumption | Servicing Assets | Applying a 0.9 multiplier to default rate
Servicing Assets And Liabilities Fair Value [Line Items]
Expected fair value with change in assumptions	12,820	8,878
Default rate assumption | Servicing Assets | Applying a 0.9 multiplier to default rate | Prosper Funding LLC
Servicing Assets And Liabilities Fair Value [Line Items]
Expected fair value with change in assumptions	$ 15,165	$ 9,926
Market servicing rate | Servicing Assets
Servicing Assets And Liabilities Fair Value [Line Items]
Valuation techniques	0.65%	0.65%
Market servicing rate | Servicing Assets | Prosper Funding LLC
Servicing Assets And Liabilities Fair Value [Line Items]
Valuation techniques	0.649%	0.65%
Prepayment rate | Servicing Assets
Servicing Assets And Liabilities Fair Value [Line Items]
Valuation techniques	18.47%	20.82%
Prepayment rate | Servicing Assets | Prosper Funding LLC
Servicing Assets And Liabilities Fair Value [Line Items]
Valuation techniques	18.77%	20.82%
Default rate | Servicing Assets
Servicing Assets And Liabilities Fair Value [Line Items]
Valuation techniques	13.38%	12.54%
Default rate | Servicing Assets | Prosper Funding LLC
Servicing Assets And Liabilities Fair Value [Line Items]
Valuation techniques	12.63%	12.24%

FAIR VALUE OF ASSETS AND LIA_10

FAIR VALUE OF ASSETS AND LIABILITIES - Schedule Credit Card Derivative Asset (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Servicing Assets And Liabilities Fair Value [Line Items]
Credit Card Derivative	$ 10,782	$ 7
Credit Card Derivative (Note 5)
Servicing Assets And Liabilities Fair Value [Line Items]
Credit Card Derivative	$ 10,800
Credit Card Derivative (Note 5) | Discount rate on Prosper Allocations
Servicing Assets And Liabilities Fair Value [Line Items]
Valuation techniques	0.2623
Credit Card Derivative (Note 5) | Discount rate on Coastal Program Fee
Servicing Assets And Liabilities Fair Value [Line Items]
Valuation techniques	0.0926
Credit Card Derivative (Note 5) | Prepayment rate
Servicing Assets And Liabilities Fair Value [Line Items]
Valuation techniques	0.1008
Credit Card Derivative (Note 5) | Prepayment rate | Applying a 1.1 multiplier to prepayment rate
Servicing Assets And Liabilities Fair Value [Line Items]
Expected fair value with change in assumptions	$ 10,625
Credit Card Derivative (Note 5) | Prepayment rate | Applying a 0.9 multiplier to prepayment rate
Servicing Assets And Liabilities Fair Value [Line Items]
Expected fair value with change in assumptions	$ 10,942
Credit Card Derivative (Note 5) | Default rate
Servicing Assets And Liabilities Fair Value [Line Items]
Valuation techniques	0.1334
Credit Card Derivative (Note 5) | Default rate | Applying a 1.1 multiplier to default rate
Servicing Assets And Liabilities Fair Value [Line Items]
Expected fair value with change in assumptions	$ 8,001
Credit Card Derivative (Note 5) | Default rate | Applying a 0.9 multiplier to default rate
Servicing Assets And Liabilities Fair Value [Line Items]
Expected fair value with change in assumptions	13,641
Credit Card Derivative (Note 5) | Discount rate | 100 basis point increase in both discount rates
Servicing Assets And Liabilities Fair Value [Line Items]
Expected fair value with change in assumptions	10,699
Credit Card Derivative (Note 5) | Discount rate | 200 basis point increase in both discount rates
Servicing Assets And Liabilities Fair Value [Line Items]
Expected fair value with change in assumptions	10,618
Credit Card Derivative (Note 5) | Discount rate | 100 basis point decrease in both discount rates
Servicing Assets And Liabilities Fair Value [Line Items]
Expected fair value with change in assumptions	10,866
Credit Card Derivative (Note 5) | Discount rate | 200 basis point decrease in both discount rates
Servicing Assets And Liabilities Fair Value [Line Items]
Expected fair value with change in assumptions	10,951
Credit Card Servicing Obligation Liability
Servicing Assets And Liabilities Fair Value [Line Items]
Derivative liability	$ 3,720
Credit Card Servicing Obligation Liability | Discount rate on Prosper Allocations
Servicing Assets And Liabilities Fair Value [Line Items]
Derivative liability, measurement input	0.0926
Credit Card Servicing Obligation Liability | Prepayment rate
Servicing Assets And Liabilities Fair Value [Line Items]
Derivative liability, measurement input	0.1008
Credit Card Servicing Obligation Liability | Prepayment rate | Applying a 1.1 multiplier to prepayment rate
Servicing Assets And Liabilities Fair Value [Line Items]
Derivative liability, expected fair value with change in assumptions	$ 3,662
Credit Card Servicing Obligation Liability | Prepayment rate | Applying a 0.9 multiplier to prepayment rate
Servicing Assets And Liabilities Fair Value [Line Items]
Derivative liability, expected fair value with change in assumptions	$ 3,779
Credit Card Servicing Obligation Liability | Default rate
Servicing Assets And Liabilities Fair Value [Line Items]
Derivative liability, measurement input	0.1334
Credit Card Servicing Obligation Liability | Default rate | Applying a 1.1 multiplier to default rate
Servicing Assets And Liabilities Fair Value [Line Items]
Derivative liability, expected fair value with change in assumptions	$ 3,636
Credit Card Servicing Obligation Liability | Default rate | Applying a 0.9 multiplier to default rate
Servicing Assets And Liabilities Fair Value [Line Items]
Derivative liability, expected fair value with change in assumptions	$ 3,806
Credit Card Servicing Obligation Liability | Market servicing rate
Servicing Assets And Liabilities Fair Value [Line Items]
Derivative liability, measurement input	0.0200
Credit Card Servicing Obligation Liability | Discount rate | 100 basis point increase in both discount rates
Servicing Assets And Liabilities Fair Value [Line Items]
Derivative liability, expected fair value with change in assumptions	$ 3,677
Credit Card Servicing Obligation Liability | Discount rate | 200 basis point increase in both discount rates
Servicing Assets And Liabilities Fair Value [Line Items]
Derivative liability, expected fair value with change in assumptions	3,616
Credit Card Servicing Obligation Liability | Discount rate | 100 basis point decrease in both discount rates
Servicing Assets And Liabilities Fair Value [Line Items]
Derivative liability, expected fair value with change in assumptions	3,774
Credit Card Servicing Obligation Liability | Discount rate | 200 basis point decrease in both discount rates
Servicing Assets And Liabilities Fair Value [Line Items]
Derivative liability, expected fair value with change in assumptions	$ 3,830

FAIR VALUE OF ASSETS AND LIA_11

FAIR VALUE OF ASSETS AND LIABILITIES - Schedule of Assets and Liabilities Not Recorded at Fair Value (Details) - USD ($) $ in Thousands		Dec. 31, 2022		Mar. 21, 2022	Dec. 31, 2021		Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents		$ 83,446			$ 67,700		$ 50,145
Restricted Cash		113,163	[1]		167,925	[1]	$ 163,723
Accounts Receivable	[1]	3,462			1,054
Total Assets		1,128,404			828,884
Accounts Payable and Accrued Liabilities		37,254			25,790
Payable to Investors		85,312			152,794
Warehouse Lines	[1]	446,762			209,275
Paycheck Protection Program loan (Note 10)		0		$ 8,600	8,590
Total Liabilities		1,156,043			928,685
Carrying Amount
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents		83,446			67,700
Accounts Receivable		3,462			1,054
Total Assets		200,071			236,679
Accounts Payable and Accrued Liabilities		37,254			25,790
Payable to Investors		85,312			152,794
Warehouse Lines		446,762			209,275
Term Loan		73,407
Paycheck Protection Program loan (Note 10)					8,590
Total Liabilities		642,735			396,449
Carrying Amount | Restricted Cash - Cash and Cash Equivalents
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Cash		108,284			163,047
Carrying Amount | Restricted Cash - Certificates of Deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Cash		4,879			4,878
Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents		83,446			67,700
Accounts Receivable		3,462			1,054
Total Assets		200,071			236,679
Accounts Payable and Accrued Liabilities		37,254			25,790
Payable to Investors		85,312			152,794
Warehouse Lines		444,329			211,177
Term Loan		76,191
Paycheck Protection Program loan (Note 10)					8,556
Total Liabilities		643,086			398,317
Fair Value | Restricted Cash - Cash and Cash Equivalents
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Cash		108,284			163,047
Fair Value | Restricted Cash - Certificates of Deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Cash		4,879			4,878
Level 1 Inputs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents		83,446			67,700
Accounts Receivable		0			0
Total Assets		191,730			230,747
Accounts Payable and Accrued Liabilities		0			0
Payable to Investors		0			0
Warehouse Lines		0			0
Term Loan		0
Paycheck Protection Program loan (Note 10)					0
Total Liabilities		0			0
Level 1 Inputs | Restricted Cash - Cash and Cash Equivalents
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Cash		108,284			163,047
Level 1 Inputs | Restricted Cash - Certificates of Deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Cash		0			0
Level 2 Inputs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents		0			0
Accounts Receivable		3,462			1,054
Total Assets		8,341			5,932
Accounts Payable and Accrued Liabilities		37,254			25,790
Payable to Investors		85,312			152,794
Warehouse Lines		444,329			211,177
Term Loan		76,191
Paycheck Protection Program loan (Note 10)					8,556
Total Liabilities		643,086			398,317
Level 2 Inputs | Restricted Cash - Cash and Cash Equivalents
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Cash		0			0
Level 2 Inputs | Restricted Cash - Certificates of Deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Cash		4,879			4,878
Level 3 Inputs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents		0			0
Accounts Receivable		0			0
Total Assets		0			0
Accounts Payable and Accrued Liabilities		0			0
Payable to Investors		0			0
Warehouse Lines		0			0
Term Loan		0
Paycheck Protection Program loan (Note 10)					0
Total Liabilities		0			0
Level 3 Inputs | Restricted Cash - Cash and Cash Equivalents
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Cash		0			0
Level 3 Inputs | Restricted Cash - Certificates of Deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Cash		$ 0			$ 0
[1](1) Includes amounts in consolidated variable interest entities (VIEs) presented separately in the table below.

GOODWILL AND OTHER INTANGIBLE_3

GOODWILL AND OTHER INTANGIBLE ASSETS, NET - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Goodwill [Line Items]
Goodwill	$ 36,368,000	$ 36,368,000
Goodwill impairment expense	0	0	$ 0
Intangible additions	0	0
Impairment of intangible assets	0	0	0
Net carrying value	192,000	328,000
Amortization of intangible assets	136,000	172,000	$ 219,000
User base and customer relationships
Goodwill [Line Items]
Net carrying value	$ 192,000	$ 328,000
Remaining Useful Life (In Years)	2 years 3 months 18 days	3 years 3 months 18 days
Minimum | User base and customer relationships
Goodwill [Line Items]
Remaining Useful Life (In Years)	3 years

GOODWILL AND OTHER INTANGIBLE_4

GOODWILL AND OTHER INTANGIBLE ASSETS, NET - Other Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Finite Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 8,170	$ 8,170
Accumulated Amortization	(7,978)	(7,842)
Net Carrying Value	192	328
Developed technology
Finite Lived Intangible Assets [Line Items]
Gross Carrying Value	3,060	3,060
Accumulated Amortization	(3,060)	(3,060)
Net Carrying Value	0	0
User base and customer relationships
Finite Lived Intangible Assets [Line Items]
Gross Carrying Value	5,050	5,050
Accumulated Amortization	(4,858)	(4,722)
Net Carrying Value	$ 192	$ 328
Remaining Useful Life (In Years)	2 years 3 months 18 days	3 years 3 months 18 days
Brand name
Finite Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 60	$ 60
Accumulated Amortization	(60)	(60)
Net Carrying Value	$ 0	$ 0
Remaining Useful Life (In Years)	1 year

GOODWILL AND OTHER INTANGIBLE_5

GOODWILL AND OTHER INTANGIBLE ASSETS, NET - Estimated Amortization (Details) $ in Thousands	Dec. 31, 2022 USD ($)
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]
2023	$ 107
2024	85
Net Carrying Value	$ 192

OTHER LIABILITIES (Details)

OTHER LIABILITIES (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Mar. 21, 2022	Dec. 31, 2021
Other Liabilities [Abstract]
Operating lease liabilities (Note 15)	$ 16,351		$ 11,026
Deferred revenue	3,880		1,196
Credit Card servicing obligation liability (Note 5)	3,500		0
Loan trailing fee liability	3,290		2,161
Deferred income tax liability	658		560
Financing lease liabilities	0		78
Paycheck Protection Program loan (Note 10)	0	$ 8,600	8,590
Other	359		289
Total Other Liabilities	$ 28,258		$ 23,900
Operating lease liability, location	Total Other Liabilities		Total Other Liabilities
Finance lease liability, location	Total Other Liabilities		Total Other Liabilities

DEBT (Details)

DEBT (Details) - USD ($) $ in Thousands

1 Months Ended

12 Months Ended

Mar. 04, 2021

Jun. 20, 2019

Apr. 30, 2019

Dec. 31, 2022

Nov. 14, 2022

Mar. 21, 2022

Dec. 31, 2021

May 19, 2021

Apr. 30, 2020

Mar. 28, 2019

Jun. 12, 2018

Jan. 19, 2018

Debt Instrument [Line Items]

Warehouse lines

[1]

$ 446,762

$ 209,275

Loans held for sale

[1]

499,765

243,170

Paycheck Protection Program loan (Note 10)

$ 0

$ 8,600

$ 8,590

Credit Agreement | Line of Credit

Debt Instrument [Line Items]

Face amount

$ 75,000

Debt issuance costs, net

$ 400

Credit Agreement | Line of Credit | SOFR

Debt Instrument [Line Items]

Basis spread on variable rate

9%

Credit Agreement | Line of Credit | SOFR | Minimum

Debt Instrument [Line Items]

Debt instrument, interest rate, paid-in-kind, stated rate

2%

Warehouse Agreement | Revolving Credit Facility

Debt Instrument [Line Items]

Minimum tangible net worth

$ 25,000

Minimum net liquidity

$ 15,000

Maximum leverage ratio

5

PWIT Warehouse Line | Revolving Credit Facility

Debt Instrument [Line Items]

Line of credit

$ 200,000

$ 100,000

Repayment period

24 months

Advance rate

87%

Commitment fee percentage

0.50%

Warehouse lines

$ 201,200

Loans held for sale

232,000

Debt issuance costs

2,200

$ 300

PWIT Warehouse Line | Revolving Credit Facility | LIBOR rate swaption (Note 10)

Debt Instrument [Line Items]

Fair value hedges, net

1,300

Change in fair value

800

PWIT Warehouse Line | LIBOR | Revolving Credit Facility

Debt Instrument [Line Items]

Basis spread on variable rate

2.75%

PWIIT Warehouse Line | Revolving Credit Facility

Debt Instrument [Line Items]

Line of credit

$ 300,000

300,000

$ 300,000

Repayment period

24 months

Advance rate

90%

Warehouse lines

245,600

Loans held for sale

276,300

Debt issuance costs

1,300

Remaining borrowing capacity

$ 55,300

PWIIT Warehouse Line, Class A | Revolving Credit Facility

Debt Instrument [Line Items]

Line of credit

$ 230,000

Commitment fee percentage

0.50%

PWIIT Warehouse Line, Class A | LIBOR | Revolving Credit Facility

Debt Instrument [Line Items]

Basis spread on variable rate

2.05%

PWIIT Warehouse Line, Class A | LIBOR | Minimum | Revolving Credit Facility

Debt Instrument [Line Items]

Increase in basis spread on variable rate

0.375%

PWIIT Warehouse Line, Class A | LIBOR | Maximum | Revolving Credit Facility

Debt Instrument [Line Items]

Increase in basis spread on variable rate, period two

0.375%

PWIIT Warehouse Line, Class B | Revolving Credit Facility

Debt Instrument [Line Items]

Line of credit

$ 70,000

PWIIT Warehouse Line, Class B | Minimum | Revolving Credit Facility

Debt Instrument [Line Items]

Commitment fee percentage

0.50%

PWIIT Warehouse Line, Class B | Maximum | Revolving Credit Facility

Debt Instrument [Line Items]

Commitment fee percentage

1%

PWIIT Warehouse Line, Class B | LIBOR | Revolving Credit Facility

Debt Instrument [Line Items]

Basis spread on variable rate

8.75%

PWIIT Warehouse Line, Class B | LIBOR | Minimum | Revolving Credit Facility

Debt Instrument [Line Items]

Increase in basis spread on variable rate

0.375%

PWIIT Warehouse Line, Class B | LIBOR | Maximum | Revolving Credit Facility

Debt Instrument [Line Items]

Increase in basis spread on variable rate

0.375%

PPP Loan

Debt Instrument [Line Items]

Face amount

$ 8,400

Interest rate

1%

Term

2 years

[1](1) Includes amounts in consolidated variable interest entities (VIEs) presented separately in the table below.

NET INCOME (LOSS) PER SHARE - B

NET INCOME (LOSS) PER SHARE - Basic and Diluted Net Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Numerator:
Net Income (Loss)	$ 70,582	$ (138,341)	$ 18,551
Plus: Return on Share Purchase	0	0	2,381
Less: Net Income Allocated to Participating Securities	(47,350)	0	(15,172)
Net Income (Loss) Attributable to Common Stockholders	23,232	(138,341)	5,760
Net Income (Loss) Available to Common Stockholders, Diluted	$ 23,232	$ (138,341)	$ 5,760
Denominator:
Weighted-Average Shares – Basic (in shares)	73,291,714	70,767,275	68,592,557
Effect of dilutive securities:
Stock options (in shares)	61,466,722	0	24,816,184
Warrants (in shares)	570,313	0	0
Convertible preferred stock warrants (in shares)	213,264,845	0	213,264,845
Weighted average shares used in computing diluted net income (loss) per share - diluted (in shares)	348,593,594	70,767,275	306,673,586
Net Income (Loss) Per Share – Basic (in dollars per share)	$ 0.32	$ (1.95)	$ 0.08
Net Income (Loss) Per Share – Diluted (in dollars per share)	$ 0.07	$ (1.95)	$ 0.02

NET INCOME (LOSS) PER SHARE - D

NET INCOME (LOSS) PER SHARE - Dilutive Shares Excluded from Calculation (Details) - shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total excluded securities (in shares)	176,579,241	445,467,557	207,711,060
Convertible Preferred Stock issued and outstanding
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total excluded securities (in shares)	158,365,655	158,365,655	158,365,655
Stock options issued and outstanding
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total excluded securities (in shares)	17,703,550	72,756,708	48,265,056
Warrants issued and outstanding
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total excluded securities (in shares)	510,036	1,080,349	1,080,349
Series E-1 Convertible Preferred Stock warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total excluded securities (in shares)	0	35,544,141	0
Series F Convertible Preferred Stock warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total excluded securities (in shares)	0	177,720,704	0

CONVERTIBLE PREFERRED STOCK, _3

CONVERTIBLE PREFERRED STOCK, CONVERTIBLE PREFERRED STOCK WARRANT LIABILITY AND COMMON STOCK - Additional Information (Details)

1 Months Ended

12 Months Ended

Jul. 21, 2020 shares

Dec. 23, 2019 shares

Sep. 20, 2017 USD ($) $ / shares shares

Feb. 27, 2017 $ / shares shares

Dec. 16, 2016 $ / shares shares

Feb. 16, 2016

Jul. 16, 2014 USD ($) shares

Jun. 18, 2014 $ / shares shares

Apr. 30, 2015 USD ($) $ / shares shares

May 31, 2014 USD ($) $ / shares shares

Sep. 30, 2013 USD ($) $ / shares shares

Jan. 31, 2013 USD ($) $ / shares shares

Dec. 31, 2022 USD ($) time vote $ / shares shares

Dec. 31, 2021 USD ($) $ / shares shares

Dec. 31, 2020 shares

Dec. 31, 2019 shares

Dec. 31, 2016 shares

Class of Stock [Line Items]

Stock split conversion ratio

1

Common stock convertible ratio if preferred stock did not participate

10

Preferred stock, shares authorized (in shares)

444,760,848

444,760,848

Shares authorized to be repurchased (in shares)

7,221,020

Dividends | $

$ 0

Common and preferred stock, shares authorized (in shares)

1,069,760,848

Common stock, authorized (in shares)

625,000,000

625,000,000

Common stock, par value (in dollars per share) | $ / shares

$ 0.01

$ 0.01

Preferred stock, par value (in dollars per share) | $ / shares

$ 0.01

Common stock, issued (in shares)

75,223,850

73,089,929

Common stock, outstanding (in shares)

74,287,915

72,153,994

Voting rights per share | vote

1

Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]

Change in Fair Value of Convertible Preferred Stock Warrants

Change in Fair Value of Convertible Preferred Stock Warrants

Common Stock

Class of Stock [Line Items]

Stock split conversion ratio

5

Common stock, outstanding (in shares)

79,465,150

77,331,229

74,316,607

73,629,136

Exercise of stock options (in shares)

2,133,921

3,014,622

Cash proceeds | $

$ 54,000

$ 61,000

Warrants issued and outstanding

Class of Stock [Line Items]

Shares issued (in shares)

0

0

Series A

Class of Stock [Line Items]

Shares issued (in shares)

69,340,760

Convertible preferred stock, price per share (in dollars per share) | $ / shares

$ 0.29

Purchase price for shares | $

$ 19,800,000

Repurchase of stock (in shares)

2,130,035

782,540

Preferred stock, shares authorized (in shares)

68,558,220

Conversion ratio of preferred stock into prosper common stock

1

Times the original issue | time

3

Liquidation preference per share (in dollars per share) | $ / shares

$ 0.29

Series A | Convertible Preferred Stock Held by Consolidated VIE

Class of Stock [Line Items]

Repurchase of Convertible Preferred Stock (in shares)

34,670,420

Series A-1

Class of Stock [Line Items]

Shares issued (in shares)

25,585,910

Convertible preferred stock, price per share (in dollars per share) | $ / shares

$ 0.01

Stock split conversion ratio

1,000,000

Liquidation preference per share (in dollars per share) | $ / shares

$ 2

Repurchase of stock (in shares)

2,245,600

Preferred stock, shares authorized (in shares)

24,760,915

Percentage of holders of preferred stock required to request for conversion, minimum (at least)

14%

Conversion ratio of preferred stock into prosper common stock

1,000,000

Liquidation preference per share (in dollars per share) | $ / shares

$ 2

Series B

Class of Stock [Line Items]

Shares issued (in shares)

41,443,670

Convertible preferred stock, price per share (in dollars per share) | $ / shares

$ 0.60

Purchase price for shares | $

$ 24,900,000

Repurchase of stock (in shares)

648,720

5,667,790

Preferred stock, shares authorized (in shares)

35,775,880

Value prior to closing of underwritten initial public offering (at least) | $

$ 2,000,000,000

Aggregate proceeds to the entity before deducting underwriters commissions and expenses (at least) | $

$ 100,000,000

Liquidation preference per share (in dollars per share) | $ / shares

$ 0.60

Series B | Convertible Preferred Stock Held by Consolidated VIE

Class of Stock [Line Items]

Repurchase of Convertible Preferred Stock (in shares)

16,577,495

Common Stock

Class of Stock [Line Items]

Repurchase of stock (in shares)

2,196,665

Series C

Class of Stock [Line Items]

Shares issued (in shares)

24,404,770

Convertible preferred stock, price per share (in dollars per share) | $ / shares

$ 2.87

Purchase price for shares | $

$ 69,900,000

Preferred stock, shares authorized (in shares)

24,404,770

Liquidation preference per share (in dollars per share) | $ / shares

$ 2.87

Series A and Series B Convertible Preferred Stock

Class of Stock [Line Items]

Shares issued (in shares)

6,963,785

Convertible preferred stock, price per share (in dollars per share) | $ / shares

$ 2.87

Repurchase of preferred stock | $

$ 18,500,000

Series D

Class of Stock [Line Items]

Shares issued (in shares)

23,888,640

Convertible preferred stock, price per share (in dollars per share) | $ / shares

$ 6.91

Purchase price for shares | $

$ 164,800,000

Liquidation preference per share (in dollars per share) | $ / shares

$ 6.91

Series E

Class of Stock [Line Items]

Preferred stock, shares authorized (in shares)

40,000,000

Series E-1 Convertible Preferred Stock

Class of Stock [Line Items]

Preferred stock, shares authorized (in shares)

35,544,141

Warrant to purchase shares (in shares)

15,277,006

20,267,135

Exercise of common stock warrants (in dollars per share) | $ / shares

$ 0.01

Liquidation preference per share (in dollars per share) | $ / shares

$ 0.84

Warrant expiration period

10 years

Change in fair value | $

$ (13,500,000)

$ (21,300,000)

Series E-1 Warrants

Class of Stock [Line Items]

Warrant to purchase shares (in shares)

15,277,006

Series F

Class of Stock [Line Items]

Preferred stock, shares authorized (in shares)

177,720,707

Exercise of common stock warrants (in dollars per share) | $ / shares

$ 0.01

Percentage of holders of preferred stock required to request for conversion, minimum (at least)

60%

Percent of liquidation preference

66.60%

Liquidation rights after payment or payment set aside, percent of liquidation preference

33.30%

Liquidation preference per share (in dollars per share) | $ / shares

$ 0.84

Change in fair value | $

$ (71,100,000)

$ (117,300,000)

Series G

Class of Stock [Line Items]

Shares issued (in shares)

37,249,497

Preferred stock, shares authorized (in shares)

37,249,497

Share price (in dollars per share) | $ / shares

$ 1.34

Proceeds net issuance cost | $

$ 47,900,000

Percentage of holders of preferred stock required to request for conversion, minimum (at least)

60%

Conversion ratio of preferred stock into prosper common stock

1.36

Liquidation preference per share (in dollars per share) | $ / shares

$ 1.34

Convertible preferred stock

Class of Stock [Line Items]

Percentage of holders of preferred stock required to request for conversion, minimum (at least)

60%

Series D

Class of Stock [Line Items]

Preferred stock, shares authorized (in shares)

23,888,640

Percentage of holders of preferred stock required to request for conversion, minimum (at least)

60%

Series E-1 And Series E-2 Convertible Preferred Stock

Class of Stock [Line Items]

Percentage of holders of preferred stock required to request for conversion, minimum (at least)

60%

Series E-2

Class of Stock [Line Items]

Preferred stock, shares authorized (in shares)

16,858,078

Percent of liquidation preference

66.60%

Liquidation rights after payment or payment set aside, percent of liquidation preference

33.30%

Liquidation preference per share (in dollars per share) | $ / shares

$ 0.84

Consortium Purchase Agreement | Series F Warrant

Class of Stock [Line Items]

Warrant to purchase shares (in shares)

177,720,706

Exercise of common stock warrants (in dollars per share) | $ / shares

$ 0.01

Warrants expiration period (in dollars per share)

10 years

Number of warrants issued to the Consortium (in shares)

3

CONVERTIBLE PREFERRED STOCK, _4

CONVERTIBLE PREFERRED STOCK, CONVERTIBLE PREFERRED STOCK WARRANT LIABILITY AND COMMON STOCK - Summary of Shares Information (Details) - USD ($) $ / shares in Units, $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Class of Stock [Line Items]
Convertible preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Convertible preferred stock, authorized (in shares)	444,760,848	444,760,848
Convertible preferred stock, outstanding (in shares)	209,613,570	209,613,570
Convertible preferred stock, issued (in shares)	209,613,570	209,613,570
Liquidation Preference, Outstanding Shares	$ 370,456	$ 370,456
Convertible Preferred Stock Held by Consolidated VIE
Class of Stock [Line Items]
Convertible preferred stock, outstanding (in shares)	(51,247,915)	(51,247,915)	(51,247,915)	0
Series A
Class of Stock [Line Items]
Convertible preferred stock, par value (in dollars per share)	$ 0.01
Convertible preferred stock, authorized (in shares)	68,558,220
Convertible preferred stock, outstanding (in shares)	66,428,185
Convertible preferred stock, issued (in shares)	66,428,185
Liquidation Preference, Outstanding Shares	$ 19,160
Series A | Convertible Preferred Stock Held by Consolidated VIE
Class of Stock [Line Items]
Convertible preferred stock, outstanding (in shares)	34,670,420
Convertible preferred stock, issued (in shares)	34,670,420
Series A-1
Class of Stock [Line Items]
Convertible preferred stock, par value (in dollars per share)	$ 0.01
Convertible preferred stock, authorized (in shares)	24,760,915
Convertible preferred stock, outstanding (in shares)	22,515,315
Convertible preferred stock, issued (in shares)	22,515,315
Liquidation Preference, Outstanding Shares	$ 45,031
Series B
Class of Stock [Line Items]
Convertible preferred stock, par value (in dollars per share)	$ 0.01
Convertible preferred stock, authorized (in shares)	35,775,880
Convertible preferred stock, outstanding (in shares)	35,127,160
Convertible preferred stock, issued (in shares)	35,127,160
Liquidation Preference, Outstanding Shares	$ 21,190
Series B | Convertible Preferred Stock Held by Consolidated VIE
Class of Stock [Line Items]
Convertible preferred stock, outstanding (in shares)	16,577,495
Convertible preferred stock, issued (in shares)	16,577,495
Series C
Class of Stock [Line Items]
Convertible preferred stock, par value (in dollars per share)	$ 0.01
Convertible preferred stock, authorized (in shares)	24,404,770
Convertible preferred stock, outstanding (in shares)	24,404,770
Convertible preferred stock, issued (in shares)	24,404,770
Liquidation Preference, Outstanding Shares	$ 70,075
Series D
Class of Stock [Line Items]
Convertible preferred stock, par value (in dollars per share)	$ 0.01
Convertible preferred stock, authorized (in shares)	23,888,640
Convertible preferred stock, outstanding (in shares)	23,888,640
Convertible preferred stock, issued (in shares)	23,888,640
Liquidation Preference, Outstanding Shares	$ 165,000
Series E-1
Class of Stock [Line Items]
Convertible preferred stock, par value (in dollars per share)	$ 0.01
Convertible preferred stock, authorized (in shares)	35,544,141
Convertible preferred stock, outstanding (in shares)	0
Convertible preferred stock, issued (in shares)	0
Liquidation Preference, Outstanding Shares	$ 0
Series E-2
Class of Stock [Line Items]
Convertible preferred stock, par value (in dollars per share)	$ 0.01
Convertible preferred stock, authorized (in shares)	16,858,078
Convertible preferred stock, outstanding (in shares)	0
Convertible preferred stock, issued (in shares)	0
Liquidation Preference, Outstanding Shares	$ 0
Series F
Class of Stock [Line Items]
Convertible preferred stock, par value (in dollars per share)	$ 0.01
Convertible preferred stock, authorized (in shares)	177,720,707
Convertible preferred stock, outstanding (in shares)	3
Convertible preferred stock, issued (in shares)	3
Liquidation Preference, Outstanding Shares	$ 0
Series G
Class of Stock [Line Items]
Convertible preferred stock, par value (in dollars per share)	$ 0.01
Convertible preferred stock, authorized (in shares)	37,249,497
Convertible preferred stock, outstanding (in shares)	37,249,497
Convertible preferred stock, issued (in shares)	37,249,497
Liquidation Preference, Outstanding Shares	$ 50,000

CONVERTIBLE PREFERRED STOCK, _5

CONVERTIBLE PREFERRED STOCK, CONVERTIBLE PREFERRED STOCK WARRANT LIABILITY AND COMMON STOCK - Valuation Techniques (Details)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Volatility | Series E-1 Convertible Preferred Stock
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value assumptions	0.720	0.630
Volatility | Series F Convertible Preferred Stock warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value assumptions	0.7200	0.630
Risk-free interest rate | Series E-1 Convertible Preferred Stock
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value assumptions	0.0430	0.0090
Risk-free interest rate | Series F Convertible Preferred Stock warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value assumptions	0.0430	0.0090
Expected term (in years) | Series E-1 Convertible Preferred Stock
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Term	2 years 9 months	2 years 9 months
Expected term (in years) | Series F Convertible Preferred Stock warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Term	2 years 9 months	2 years 9 months
Dividend yield | Series E-1 Convertible Preferred Stock
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value assumptions	0	0
Dividend yield | Series F Convertible Preferred Stock warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value assumptions	0	0

STOCK-BASED COMPENSATION - Addi

STOCK-BASED COMPENSATION - Additional Information (Details)	12 Months Ended
	Dec. 31, 2022 USD ($) shares	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Aug. 11, 2020 vote
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options exercisable, maximum period	10 years
Number of stock option repricing programs authorized | vote				3
Financial statement impact	$ 1,326,000	$ 1,136,000	$ 1,913,000
Dividend yield	0%	0%	0%
Unrecognized cost of unvested share-based compensation awards.	$ 0
Internal-use software and website development costs
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Capitalized amount	200,000	$ 137,000	$ 234,000
Stock Option Repricing
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Financial statement impact	0	$ 0	$ 400,000
Restricted Stock Unit (RSUs)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unamortized expense related to unvested stock-based awards	$ 2,800,000
Vesting period remaining	2 years 10 months 24 days
2015 Stock Option Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of options made available in pool, up to (in shares) | shares	94,721,992
Tranche three
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting percent	25%
Vesting percent after initial period following commencement date	2.083%
Vesting period of the options	1 year
Tranche two
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting percent	50%
Vesting percent after initial period following commencement date, option one	2.083%
Vesting percent after initial period following commencement date, option two	2.778%
Vesting period of the options	2 years

STOCK-BASED COMPENSATION - Summ

STOCK-BASED COMPENSATION - Summarized Stock Option Activity (Details) - 2005 Stock Plan and 2015 Stock Option Plan - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Options Issued and Outstanding
Options Issued and Outstanding, Beginning Balance (in shares)	72,186,151
Options Issued and Outstanding, Options granted (in shares)	17,713,281
Options Issued and Outstanding, Options exercised - vested (in shares)	(2,133,921)
Options Issued and Outstanding, Options forfeited (in shares)	(10,031,923)
Options Issued and Outstanding, Options expirations (in shares)	(5,825)
Options Issued and Outstanding, Ending balance (in shares)	77,727,763	72,186,151
Options Issued and Outstanding, Options vested and expected to vest (in shares)	70,664,163
Options Issued and Outstanding, Options vested and exercisable (in shares)	55,063,268
Weighted- Average Exercise Price
Weighted-Average Exercise Price, Beginning balance (in dollars per share)	$ 0.07
Weighted-Average Exercise Price, Options granted (in dollars per share)	0.59
Weighted-Average Exercise Price, Options exercised - vested (in dollars per share)	0.03
Weighted-Average Exercise Price, Options forfeited (in dollars per share)	0.49
Weighted-Average Exercise Price, Options expirations (in dollars per share)	0.02
Weighted-Average Exercise Price, Ending balance (in dollars per share)	0.13	$ 0.07
Options expected to vest (in dollars per share)	0.13
Weighted-Average Exercise Price, Options vested and exercisable (in dollars per share)	$ 0.04
Weighted-Average Contractual Term (in years)
Weighted average contractual term	6 years 2 months 19 days	6 years 8 months 19 days
Weighted average contractual term, Options expected to vest	6 years 2 months 19 days
Weighted Average Contractual Term, Options vested and exercisable	5 years 1 month 20 days
Aggregate intrinsic value1 (in thousands)
Options outstanding, aggregate intrinsic value	$ 19,450	$ 46,458
Options vested and expected to vest, aggregate intrinsic value	18,733
Options vested and exercisable, aggregate intrinsic value	$ 17,149

STOCK-BASED COMPENSATION - Ad_2

STOCK-BASED COMPENSATION - Additional Information Regarding Common Stock Options (Details) - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share-Based Payment Arrangement [Abstract]
Weighted average grant fair value (in dollars per share)	$ 0.37	$ 0.13	$ 0.04

STOCK-BASED COMPENSATION - Fair

STOCK-BASED COMPENSATION - Fair Value of Stock Option Awards (Details)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Fair value of stock option awards [Abstract]
Volatility of common stock	67.19%	64.22%	52.62%
Risk-free interest rate	2.95%	1.02%	0.51%
Expected life	6 years	6 years	6 years
Dividend yield	0%	0%	0%

STOCK-BASED COMPENSATION - Su_2

STOCK-BASED COMPENSATION - Summarized Activities for RSU's (Details) - Restricted Stock Unit (RSUs)	12 Months Ended
	Dec. 31, 2022 $ / shares shares
Number of Shares
Unvested beginning balance (in shares) | shares	2,874,348
Forfeited (in shares) | shares	(33,960)
Expired (in shares) | shares	(238,005)
Unvested ending balance (in shares) | shares	2,602,383
Weighted-Average Grant Date Fair Value
Unvested beginning balance (in dollars per share) | $ / shares	$ 1.14
Forfeited (in dollars per share) | $ / shares	2.18
Expired (in dollar per shares) | $ / shares	2.14
Unvested ending balance (in dollars per share) | $ / shares	$ 1.04

STOCK-BASED COMPENSATION - Allo

STOCK-BASED COMPENSATION - Allocated Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total Stock-Based Compensation	$ 1,326	$ 1,136	$ 1,913
Origination and Servicing
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total Stock-Based Compensation	134	123	35
Sales and Marketing
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total Stock-Based Compensation	118	62	69
General and Administrative
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total Stock-Based Compensation	$ 1,074	$ 951	$ 1,809

INCOME TAXES - Components of In

INCOME TAXES - Components of Income Tax (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Current:
Federal	$ 0	$ 0	$ 0
State	197	0	0
Foreign	0	0	0
Total Current Income Tax Expense (Benefit)	197	0	0
Deferred:
Federal	47	47	47
State	51	24	38
Foreign	0	0	(69)
Total Deferred Income Tax Expense	98	71	16
Total Income Tax Expense	$ 295	$ 71	$ 16

INCOME TAXES - Effective Income

INCOME TAXES - Effective Income Tax Reconciliation (Details)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2018
Effective income tax rate reconciliation [Abstract]
Federal tax at statutory rate	21%	21%	21%	21%
State tax at statutory rate (net of federal benefit)	6%	8%	8%
Incentive stock options	1%	(5.00%)	2%
Preferred Stock Warrants	(36.00%)	(29.00%)	(64.00%)
Change in valuation allowance	15%	6%	37%
Return-to-provision	(2.00%)	0%	0%
Change in U.S. Tax Rate Applied to Deferred Taxes	(5.00%)	0%
Other	0%	(1.00%)	(4.00%)
Income Tax Expense	0%	0%	0%

INCOME TAXES - Deferred Tax Ass

INCOME TAXES - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Deferred tax assets and liabilities [Abstract]
Net operating loss carry forwards	$ 85,330	$ 91,793
Research and other credits	3,438	307
Stock compensation	4,025	4,272
Accrued liabilities	5,159	4,357
Lease liabilities	4,798	3,266
Property and equipment	1,214	0
Section 174 R&D capitalization	11,204	0
Total deferred tax assets	115,168	103,995
Net servicing rights	(2,040)	(1,898)
Property and equipment	0	(1,873)
Intangible assets	(2,129)	(1,770)
Right-of-use assets	(4,147)	(2,264)
Total deferred tax liabilities	(8,316)	(7,805)
Total net deferred tax asset	106,852	96,190
Less: Valuation allowance	(107,512)	(96,750)
Net deferred tax liability	$ (660)	$ (560)

INCOME TAXES - Additional Infor

INCOME TAXES - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Tax Credit Carryforward [Line Items]
Deferred tax assets valuation, increase amount	$ 10,800,000
Valuation allowance	107,512,000	$ 96,750,000
Unrecognized tax benefits that would affect effective tax rate	0
Interest and penalties related to uncertain tax positions	0
Income tax expense	$ 295,000	$ 71,000	$ 16,000
Effective tax rate	0%	0%	0%
Prosper Funding LLC
Tax Credit Carryforward [Line Items]
Income tax expense	$ 0	$ 0
Effective tax rate	0%
Federal
Tax Credit Carryforward [Line Items]
Net operating loss carryforwards	$ 307,900,000
Federal | Research and Development
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	2,800,000
State
Tax Credit Carryforward [Line Items]
Net operating loss carryforwards	$ 372,300,000
Tax period subject to examination	4 years
California | Research and Development
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	$ 2,800,000
Internal Revenue Service (IRS)
Tax Credit Carryforward [Line Items]
Tax period subject to examination	3 years

INCOME TAXES - Unrecognized Tax

INCOME TAXES - Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Unrecognized tax benefits [Roll Forward]
Balance at January 1,	$ 112	$ 112	$ 112
Decrease related to current year tax position		0	0
Increase related to prior year tax position	1,179
Balance at December 31,	$ 1,291	$ 112	$ 112

LEASES - Additional Information

LEASES - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	May 31, 2022
Lessee, Lease, Description [Line Items]
Renewal term	5 years
Operating lease expense	$ 4,700,000	$ 4,500,000	$ 4,500,000
Sublease income	700,000	300,000	400,000
Gross Carrying Value	27,051,000
Operating lease liabilities (Note 15)	16,351,000	11,026,000
Impairment charge	$ 0	$ 0	445,000
Operating lease liability, location	Other Liabilities	Other Liabilities
CALIFORNIA | Building
Lessee, Lease, Description [Line Items]
Gross Carrying Value			400,000	$ 9,900,000
Operating lease liabilities (Note 15)			$ 400,000	$ 9,900,000
Minimum
Lessee, Lease, Description [Line Items]
Remaining lease term	1 year
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease term	5 years

LEASES - Operating Lease Right-

LEASES - Operating Lease Right-of-Use Assets (Details) $ in Thousands	Dec. 31, 2022 USD ($)
Lessee, Lease, Description [Line Items]
Gross Carrying Value	$ 27,051
Accumulated Amortization	12,919
Net Carrying Value	$ 14,132
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Property and Equipment, Net
ROU assets - office buildings
Lessee, Lease, Description [Line Items]
Gross Carrying Value	$ 26,151
Accumulated Amortization	12,215
Net Carrying Value	13,936
ROU assets - other
Lessee, Lease, Description [Line Items]
Gross Carrying Value	900
Accumulated Amortization	704
Net Carrying Value	$ 196

LEASES - Schedule of Lease Matu

LEASES - Schedule of Lease Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
2023	$ 3,715
2024	4,391
2025	4,517
2026	4,432
2027	3,311
Thereafter	1,411
Total future minimum lease payments	21,777
Less: Imputed interest	(5,426)
Present value of future minimum lease payments	$ 16,351	$ 11,026

LEASES - Supplemental Cash Flow

LEASES - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Non-cash operating activity:
ROU assets obtained or adjusted in exchange for new, amended and modified operating lease liabilities	$ 9,980	$ 1,773	$ 290

LEASES - Other Information Rela

LEASES - Other Information Related to Leases (Details)	Dec. 31, 2022
Leases [Abstract]
Weighted-average remaining lease term	4 years 10 months 17 days
Weighted-average discount rate	10.96%

COMMITMENTS AND CONTINGENCIES (

COMMITMENTS AND CONTINGENCIES (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Entity Information [Line Items]
Designated Amount for loans (less than), through February 2025	$ 100,000
Minimum fee, 2023	1,200,000
Minimum fee, 2024	1,200,000
Minimum fee, 2025	100,000
Minimum net liquidity	15,000,000
Purchase commitment of borrower loans	6,000,000
Maximum potential future payments	3,700,000,000
Accrued repurchase and indemnification obligation	300,000	$ 300,000
Additional indemnification amount	1,200,000
Prosper Funding LLC
Entity Information [Line Items]
Designated Amount for loans (less than), through February 2025	100,000
Minimum fee, 2025	100,000
Minimum net liquidity	15,000,000
Purchase commitment of borrower loans	6,000,000
Maximum potential future payments	3,700,000,000
Accrued repurchase and indemnification obligation	$ 300,000	$ 300,000

RELATED PARTIES - Additional In

RELATED PARTIES - Additional Information (Details)	12 Months Ended
	Dec. 31, 2022
Related Party Transactions [Abstract]
Minimum percentage of voting securities considered for related parties (more than)	10%
Minimum percentage of stock holders considered for related parties	10%

RELATED PARTIES - Aggregate Amo

RELATED PARTIES - Aggregate Amount of Notes Purchased and the Income Earned (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Related Party Transaction [Line Items]
Aggregate Amount of Notes Purchased	$ 37	$ 59
Interest Earned on Notes and Borrower Loans	8	8
Notes balance	58	56
Prosper Funding LLC
Related Party Transaction [Line Items]
Aggregate Amount of Notes Purchased	34	35
Interest Earned on Notes and Borrower Loans	7	7
Notes balance	45	41
Executive officers and management
Related Party Transaction [Line Items]
Aggregate Amount of Notes Purchased	37	35
Interest Earned on Notes and Borrower Loans	7	7
Notes balance	52	41
Executive officers and management | Prosper Funding LLC
Related Party Transaction [Line Items]
Aggregate Amount of Notes Purchased	34	35
Interest Earned on Notes and Borrower Loans	7	7
Notes balance	45	41
Directors (excluding executive officers and management)
Related Party Transaction [Line Items]
Aggregate Amount of Notes Purchased	0	24
Interest Earned on Notes and Borrower Loans	1	1
Notes balance	6	15
Directors (excluding executive officers and management) | Prosper Funding LLC
Related Party Transaction [Line Items]
Aggregate Amount of Notes Purchased	0	0
Interest Earned on Notes and Borrower Loans	0	0
Notes balance	$ 0	$ 0

POSTRETIREMENT BENEFIT PLANS (D

POSTRETIREMENT BENEFIT PLANS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Retirement Benefits [Abstract]
Deferred compensation arrangement with eligible employees, percentage (up to)	90%
Employer contribution during the period	$ 2.7	$ 2	$ 1.2

SIGNIFICANT CONCENTRATIONS (Det

SIGNIFICANT CONCENTRATIONS (Details)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Concentration Risk [Line Items]
Percentage of fund from whole loan channel	92%	88%
Prosper Funding LLC
Concentration Risk [Line Items]
Percentage of fund from whole loan channel	92%	88%
Party One
Concentration Risk [Line Items]
Percentage of loans purchased	23.40%	26.70%
Party One | Prosper Funding LLC
Concentration Risk [Line Items]
Percentage of loans purchased	23.40%	26.70%
Party Two
Concentration Risk [Line Items]
Percentage of loans purchased	10.40%
Party Two | Prosper Funding LLC
Concentration Risk [Line Items]
Percentage of loans purchased	10.40%
Warehouse VIE | Prosper Funding LLC
Concentration Risk [Line Items]
Percentage of loans purchased	13.90%	12.60%

SEGMENTS - Additional Informati

SEGMENTS - Additional Information (Details) - segment	3 Months Ended	9 Months Ended
	Dec. 31, 2022	Sep. 30, 2022
Segment Reporting [Abstract]
Number of reporting segments	3	1
Number of operating segments	3	1

SEGMENTS - Segment Information

SEGMENTS - Segment Information Reconciled (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Total Net Revenue	$ 199,881	$ 144,626	$ 103,236
Segment Adjusted EBITDA	(9,056)	12,814	(8,587)
Depreciation expense:
Origination and Servicing	(8,132)	(7,167)	(5,830)
General and Administrative	(2,656)	(2,501)	(2,300)
Amortization of intangibles	(136)	(172)	(219)
Impairment Expenses	0	0	(445)
Stock-based compensation	(1,326)	(1,136)	(1,913)
Change in Fair Value of Convertible Preferred Stock Warrants	84,595	(138,622)	37,677
Gain on Forgiveness of PPP Loan	8,604	0	0
Loss on Deconsolidation of VIEs	0	(1,494)	0
Interest income on cash and cash equivalents	511	8	184
Interest Expense on Term Loan	(1,527)
Net Income (Loss) Before Income Taxes	70,877	(138,270)	18,567
Interest Income (Expense) Included in Segment Adjusted EBITDA
Interest Income on Borrower Loans and Loans Held for Sale	86,350	83,107	104,150
Interest Expense on Notes and Warehouse Lines/Financial Instruments	(60,025)	(50,816)	(60,127)
Total Interest Income, Net	26,325	32,291	44,023
Operating Segments | Personal Loan
Segment Reporting Information [Line Items]
Total Net Revenue	180,717	143,670	102,979
Segment Adjusted EBITDA	2,053	19,219	(5,106)
Interest Income (Expense) Included in Segment Adjusted EBITDA
Interest Income on Borrower Loans and Loans Held for Sale	86,350	83,107	104,150
Interest Expense on Notes and Warehouse Lines/Financial Instruments	(60,025)	(50,816)	(60,127)
Total Interest Income, Net	26,325	32,291	44,023
Operating Segments | Home Equity
Segment Reporting Information [Line Items]
Total Net Revenue	2,821	946	257
Segment Adjusted EBITDA	(2,163)	(2,556)	(3,481)
Interest Income (Expense) Included in Segment Adjusted EBITDA
Interest Income on Borrower Loans and Loans Held for Sale	0		0
Interest Expense on Notes and Warehouse Lines/Financial Instruments	0		0
Total Interest Income, Net	0		$ 0
Operating Segments | Credit Card
Segment Reporting Information [Line Items]
Total Net Revenue	16,343	10
Segment Adjusted EBITDA	(8,946)	(3,849)
Interest Income (Expense) Included in Segment Adjusted EBITDA
Interest Income on Borrower Loans and Loans Held for Sale	0	0
Interest Expense on Notes and Warehouse Lines/Financial Instruments	0	0
Total Interest Income, Net	$ 0	$ 0

SUBSEQUENT EVENTS (Details)

SUBSEQUENT EVENTS (Details) - Revolving Credit Facility - USD ($) $ in Millions	Feb. 10, 2023	Mar. 04, 2021	Dec. 31, 2022	Mar. 28, 2019
PWIIT Warehouse Line
Subsequent Event [Line Items]
Line of credit		$ 300	$ 300	$ 300
Advance rate		90%
Repayment period		24 months
PWIIT Warehouse Line, Class A
Subsequent Event [Line Items]
Line of credit		$ 230
Commitment fee percentage		0.50%
PWIIT Warehouse Line, Class B
Subsequent Event [Line Items]
Line of credit		$ 70
PWIIT Warehouse Line, Class B | Minimum
Subsequent Event [Line Items]
Commitment fee percentage		0.50%
PWIIT Warehouse Line, Class B | Maximum
Subsequent Event [Line Items]
Commitment fee percentage		1%
Subsequent Event | PWIIT Warehouse Line
Subsequent Event [Line Items]
Line of credit	$ 450
Advance rate	90%
Repayment period	24 months
Subsequent Event | PWIIT Warehouse Line | Minimum
Subsequent Event [Line Items]
Advance rate	80%
Subsequent Event | PWIIT Warehouse Line | Maximum
Subsequent Event [Line Items]
Advance rate	90%
Subsequent Event | PWIIT Warehouse Line, Class A
Subsequent Event [Line Items]
Line of credit	$ 400
Commitment fee percentage	0.75%
Subsequent Event | PWIIT Warehouse Line, Class A | SOFR
Subsequent Event [Line Items]
Basis spread on variable rate	2.85%
Increase in basis spread on variable rate	0.375%
Subsequent Event | PWIIT Warehouse Line, Class A | SOFR | Maximum
Subsequent Event [Line Items]
Increase in basis spread on variable rate, period two	0.375%
Subsequent Event | PWIIT Warehouse Line, Class B
Subsequent Event [Line Items]
Line of credit	$ 50
Subsequent Event | PWIIT Warehouse Line, Class B | Minimum
Subsequent Event [Line Items]
Commitment fee percentage	0.50%
Subsequent Event | PWIIT Warehouse Line, Class B | Maximum
Subsequent Event [Line Items]
Commitment fee percentage	1%
Subsequent Event | PWIIT Warehouse Line, Class B | SOFR
Subsequent Event [Line Items]
Increase in basis spread on variable rate	0.375%
Increase in basis spread on variable rate, period two	0.375%
Subsequent Event | PWIIT Warehouse Line, Class B | SOFR | Maximum
Subsequent Event [Line Items]
Basis spread on variable rate	10.75%