CBIZ (CBZ) 10-K 28 Feb 25 2024 FY Annual report Financial data

Cover

Cover - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Feb. 21, 2025	Jun. 28, 2024
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2024
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	1-32961
Entity Registrant Name	CBIZ, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	22-2769024
Entity Address, Address Line One	5959 Rockside Woods Blvd. N.
Entity Address, Address Line Two	Suite 600
Entity Address, City or Town	Independence,
Entity Address, State or Province	OH
Entity Address, Postal Zip Code	44131
City Area Code	216
Local Phone Number	447-9000
Title of 12(b) Security	Common Stock, $0.01 Par Value
Trading Symbol	CBZ
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Document Financial Statement Error Correction	false
Entity Shell Company	false
Entity Public Float			$ 3,670
Entity Common Stock, Shares Outstanding		53,758,439
Documents Incorporated by Reference	The registrant incorporates by reference in Part III hereof portions of its definitive Proxy Statement for its 2025 Annual Meeting of Stockholders.
Amendment Flag	false
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	FY
Entity Central Index Key	0000944148

Audit Information

Audit Information	12 Months Ended
	Dec. 31, 2024
Audit Information [Abstract]
Auditor Name	KPMG LLP
Auditor Location	Cleveland, OH
Auditor Firm ID	185

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 13,826	$ 8,090
Restricted cash	38,661	30,362
Accounts receivable, net	534,858	380,152
Income tax receivable	4,051	0
Other current assets	68,477	34,895
Current assets before funds held for clients	659,873	453,499
Funds held for clients	175,853	159,186
Total current assets	835,726	612,685
Non-current assets:
Property and equipment, net	88,163	57,012
Goodwill and other intangible assets, net	2,945,470	1,008,604
Assets of deferred compensation plan	167,170	143,499
Right-of-use asset	393,512	211,024
Other non-current assets	40,842	10,768
Total non-current assets	3,635,157	1,430,907
Total assets	4,470,883	2,043,592
Current liabilities:
Accounts payable	90,646	82,831
Income taxes payable	0	2,097
Accrued personnel costs	172,759	133,593
Contingent purchase price liability	61,164	66,287
Lease liability	60,549	36,283
Current portion of Term Loan	70,000	0
Current portion debt issuance costs, Term Loan	(3,823)	0
Total short-term debt	66,177	0
Other current liabilities	78,579	30,937
Current liabilities before client fund obligations	529,874	352,028
Client fund obligations	175,928	159,893
Total current liabilities	705,802	511,921
Non-current liabilities:
Revolver Facility	20,900	312,400
Debt issuance costs, Revolver	(7,160)	(1,574)
Long-term portion, Term Loan	1,330,000	0
Long-term portion debt issuance costs, Term Loan	(9,985)	0
Total long-term debt	1,333,755	310,826
Income taxes payable	2,193	1,984
Deferred income taxes, net	10,880	29,287
Deferred compensation plan obligations	167,170	143,499
Contingent purchase price liability	35,803	48,659
Lease liability	372,586	203,905
Other non-current liabilities	62,711	1,893
Total non-current liabilities	1,985,098	740,053
Total liabilities	2,690,900	1,251,974
STOCKHOLDER EQUITY
Common stock, par value $0.01 per share; shares authorized 250,000; shares issued 137,945 and 137,387; shares outstanding 50,198 and 49,814	1,380	1,374
Additional paid-in capital	1,791,863	832,475
Retained earnings	896,122	855,084
Treasury stock, 87,747 and 87,573 shares	(910,601)	(899,093)
Accumulated other comprehensive income	1,219	1,778
Total stockholders’ equity	1,779,983	791,618
Total liabilities and stockholders’ equity	$ 4,470,883	$ 2,043,592

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Dec. 31, 2024	Dec. 31, 2023
Statement of Financial Position [Abstract]
Common stock, par or stated value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	250,000,000	250,000,000
Common stock, shares, issued (in shares)	137,945,000	137,387,000
Common stock, shares, outstanding (in shares)	50,198,000	49,814,000
Treasury stock, shares (in shares)	87,747,000	87,573,000

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statement of Comprehensive Income [Abstract]
Revenue	$ 1,813,472	$ 1,591,194	$ 1,411,979
Operating expenses	1,631,003	1,367,990	1,188,612
Gross margin	182,469	223,204	223,367
Corporate general and administrative expenses	108,753	57,965	55,023
Operating income	73,716	165,239	168,344
Other income (expense):
Interest expense	(34,379)	(20,131)	(8,039)
Gain on sale of operations, net	4,932	176	413
Other income (expense), net	13,538	21,019	(19,243)
Total other income (expense), net	(15,909)	1,064	(26,869)
Income before income tax expense	57,807	166,303	141,475
Income tax expense	16,769	45,335	36,121
Net income	$ 41,038	$ 120,968	$ 105,354
Earnings per share:
Basic (in dollars per share)	$ 0.78	$ 2.42	$ 2.05
Diluted (in dollars per share)	$ 0.78	$ 2.39	$ 2.01
Basic weighted average common shares outstanding (in shares)	52,375	49,989	51,502
Diluted weighted average common shares outstanding (in shares)	52,661	50,557	52,388
Comprehensive income:
Net income	$ 41,038	$ 120,968	$ 105,354
Other comprehensive income (loss):
Net unrealized gain (loss) on available-for-sale securities, net of income tax expense (benefit) of $182, $403 and $(520)	457	1,013	(1,391)
Net unrealized (loss) gain on interest rate swaps, net of income tax (benefit) expense of $(287), $(952) and $1,965	(989)	(2,821)	5,986
Foreign currency translation	(27)	(18)	(24)
Total other comprehensive (loss) income	(559)	(1,826)	4,571
Total comprehensive income	$ 40,479	$ 119,142	$ 109,925

CONSOLIDATED STATEMENTS OF CO_2

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statement of Comprehensive Income [Abstract]
Net unrealized gain (loss) on available-for-sale securities, net of income tax expense (benefit)	$ 182	$ 403	$ (520)
Net unrealized (loss) gain on interest rate swaps, net of income tax (benefit) expense	$ (287)	$ (952)	$ 1,965

CONSOLIDATED STATEMENTS OF STOC

CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($) $ in Thousands	Total	Restricted stock units and awards	Performance share units	Common Stock	Common Stock Restricted stock units and awards	Common Stock Performance share units	Treasury Shares	Additional Paid-In Capital	Additional Paid-In Capital Restricted stock units and awards	Additional Paid-In Capital Performance share units	Retained Earnings	Accumulated Other Comprehensive (Loss) Income
Common stock, beginning balance (in shares) at Dec. 31, 2021				135,187,000
Treasury stock, beginning balance (in shares) at Dec. 31, 2021							83,149,000
Beginning balance at Dec. 31, 2021	$ 704,548			$ 1,352			$ (694,716)	$ 770,117			$ 628,762	$ (967)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	105,354										105,354
Other comprehensive income (loss)	4,571											4,571
Share repurchases (in shares)							2,778,000
Share repurchases	(122,773)						$ (122,773)
Indirect repurchase of shares for minimum tax withholding (in shares)							188,000
Indirect repurchase of shares for minimum tax withholding	(7,289)						$ (7,289)
Restricted stock units and awards and Performance share units (in shares)					120,000	211,000
Restricted stock units and awards and Performance share units		$ 0	$ 0		$ 1	$ 2			$ (1)	$ (2)
Stock options exercised (in shares)				670,000
Stock options exercised	10,035			$ 7				10,028
Share-based compensation	14,689							14,689
Shares issued during period for acquisitions (in shares)				107,000
Business acquisitions	4,317			$ 1				4,316
Common stock, ending balances (in shares) at Dec. 31, 2022				136,295,000
Treasury stock, ending balance (in shares) at Dec. 31, 2022							86,115,000
Ending balance at Dec. 31, 2022	713,452			$ 1,363			$ (824,778)	799,147			734,116	3,604
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	120,968										120,968
Other comprehensive income (loss)	(1,826)											(1,826)
Share repurchases (in shares)							1,285,000
Share repurchases	$ (65,142)						$ (65,142)
Indirect repurchase of shares for minimum tax withholding (in shares)	200,000						173,000
Indirect repurchase of shares for minimum tax withholding	$ (8,448)						$ (8,448)
Restricted stock units and awards and Performance share units (in shares)					153,000	244,000
Restricted stock units and awards and Performance share units		0	0		$ 2	$ 2			(2)	(2)
Stock options exercised (in shares)				453,000
Stock options exercised	8,764			$ 5				8,759
Share-based compensation	12,286							12,286
Shares issued during period for acquisitions (in shares)				242,000
Business acquisitions	11,735			$ 2				11,733
Excise tax on share repurchases	$ (171)						$ (725)	554
Common stock, ending balances (in shares) at Dec. 31, 2023	137,387,000			137,387,000
Treasury stock, ending balance (in shares) at Dec. 31, 2023	87,573,000						87,573,000
Ending balance at Dec. 31, 2023	$ 791,618			$ 1,374			$ (899,093)	832,475			855,084	1,778
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	41,038										41,038
Other comprehensive income (loss)	$ (559)											(559)
Indirect repurchase of shares for minimum tax withholding (in shares)	200,000						174,000
Indirect repurchase of shares for minimum tax withholding	$ (11,508)						$ (11,508)
Restricted stock units and awards and Performance share units (in shares)					126,000	273,000
Restricted stock units and awards and Performance share units		$ 0	$ 0		$ 1	$ 3			$ (1)	$ (3)
Stock options exercised (in shares)	0
Share-based compensation	$ 13,836							13,836
Shares issued during period for acquisitions (in shares)				159,000
Business acquisitions	$ 945,558			$ 2				945,556
Common stock, ending balances (in shares) at Dec. 31, 2024	137,945,000			137,945,000
Treasury stock, ending balance (in shares) at Dec. 31, 2024	87,747,000						87,747,000
Ending balance at Dec. 31, 2024	$ 1,779,983			$ 1,380			$ (910,601)	$ 1,791,863			$ 896,122	$ 1,219

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Cash flows from operating activities:
Net income	$ 41,038	$ 120,968	$ 105,354
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on sale of operations, net of tax	(4,932)	(176)	(413)
Depreciation and amortization expense	48,060	36,269	32,895
Bad debt expense, net of recoveries	3,792	1,551	1,173
Adjustment to contingent earnout liability, net	6,993	2,743	2,435
Deferred income taxes	(8,621)	11,273	13,877
Stock-based compensation expense	13,836	12,286	14,689
Other, net	130	(2,365)	(1,835)
Changes in assets and liabilities, net of acquisitions and divestitures:
Accounts receivable, net	48,218	(36,093)	(61,106)
Other assets	2,809	(6,626)	(11,855)
Accounts payable	(18,846)	2,210	14,363
Income taxes payable	(7,544)	(5,918)	(5,578)
Accrued personnel costs	(5,830)	2,711	24,009
Other liabilities	4,589	14,674	(1,876)
Net cash provided by operating activities	123,692	153,507	126,132
Cash flows from investing activities:
Business acquisitions and purchases of client lists, net of cash acquired	(1,087,521)	(53,110)	(79,141)
Purchases of client fund investments	(23,210)	(14,122)	(19,771)
Proceeds from the sales and maturities of client fund investments	21,923	18,465	12,400
Proceeds from sales of assets and divested operations	7,131	3,059	3,022
Additions to property and equipment	(12,914)	(23,052)	(8,641)
Other, net	(34,692)	(10,633)	(6,987)
Net cash used in investing activities	(1,129,283)	(79,393)	(99,118)
Cash flows from financing activities:
Proceeds from Term Loan	1,400,000	0	0
Proceeds from Revolver	1,087,900	1,224,000	824,900
Payments on Revolver	(1,379,400)	(1,177,300)	(714,500)
Deferred financing costs	(20,654)	0	(2,072)
Payment for acquisition of treasury stock	0	(65,378)	(122,538)
Indirect repurchase of shares for minimum tax withholding	(11,508)	(8,448)	(7,289)
Changes in client funds obligations	16,035	(13,574)	15,352
Payment of contingent consideration of acquisitions and client lists	(56,760)	(45,175)	(21,231)
Proceeds from exercise of stock options	0	8,764	10,035
Net cash provided by (used in) financing activities	1,035,613	(77,111)	(17,343)
Net increase (decrease) in cash, cash equivalents and restricted cash	30,022	(2,997)	9,671
Cash, cash equivalents and restricted cash at beginning of year	157,148	160,145	150,474
Cash, cash equivalents and restricted cash at end of year	187,170	157,148	160,145
Reconciliation of cash, cash equivalents and restricted cash to the Consolidated Balance Sheets:
Cash and cash equivalents	13,826	8,090	4,697
Restricted cash	38,661	30,362	28,487
Cash equivalents included in funds held for clients	134,683	118,696	126,961
Cash, cash equivalents and restricted cash at end of year	187,170	157,148	160,145
Supplemental disclosures of cash flow information:
Cash paid for interest	25,686	19,127	7,421
Cash paid for income taxes, net of income tax refunds	$ 37,537	$ 39,976	$ 27,815

BASIS OF PRESENTATION AND SIGNI

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES	12 Months Ended
	Dec. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES	BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES Selected Terms Used in Notes to Consolidated Financial Statements ASA - Administrative Service Agreement. ASC - Accounting Standards Codification. ASU - Accounting Standards Update. CPA firm - Certified Public Accounting firm. FASB - The Financial Accounting Standards Board. GAAP - United States Generally Accepted Accounting Principles. LIBOR - London Interbank Offered Rate. SOFR - The Secured Overnight Financing Rate. ROU - Right of Use. SEC - United States Securities & Exchange Commission. Marcum Acquisition - the Transaction Organization - CBIZ, Inc. is a leading provider of financial, insurance and advisory services to businesses throughout the United States and parts of Canada. Acting through its subsidiaries, it has been serving small and medium-sized businesses, as well as individuals, governmental entities, and not-for-profit enterprises. CBIZ, Inc. manages and reports its operations along three practice groups: Financial Services, Benefits and Insurance Services and National Practices. A further description of products and services offered by each of the practice groups is provided in Note 19, Segment Disclosures, to the accompanying consolidated financial statements. In July 2024, CBIZ announced the acquisition of Marcum LLP, representing the largest transaction in the Company’s history. That acquisition closed on November 1, 2024, augmenting the Company’s services across the three practice groups. Refer to Note 2. Business Combination for further discussion of the Marcum Acquisition (the "Transaction"). Effective April 1, 2023, CBIZ, Inc. formed Rockside Insurance Company, Inc. ("Rockside"), a captive insurance company licensed in Vermont. Rockside, wholly owned by CBIZ, Inc., provides insurance coverages for a portion of the retention deductibles from CBIZ, Inc.'s certain insurance programs with third party insurers. Basis of Presentation - The accompanying consolidated financial statements reflect the operations of CBIZ, Inc. and all of its wholly-owned subsidiaries (“CBIZ,” the “Company,” “we,” “us” or “our”), after elimination of all intercompany accounts and transactions. We have prepared the accompanying consolidated financial statements in accordance with United States Generally Accepted Accounting Principles ("GAAP") and pursuant to the rules and regulations of the United States Securities & Exchange Commission ("SEC"). We have determined that our relationship with certain CPA firms with whom we maintain ASAs qualify as variable interest entities ("VIEs"), and we are the primary beneficiary of such VIE. The accompanying consolidated financial statements do not reflect the results of operations or the financial position of the VIEs as the impact is not material to our consolidated financial condition, results of operations or cash flows. Fees earned by us under the ASAs are recorded at net realizable value as a component of “Revenue” in the accompanying Consolidated Statements of Comprehensive Income and were approximately $306.5 million, $259.6 million and $235.4 million for the years ended December 31, 2024, 2023 and 2022, respectively, the majority of which was related to services rendered to privately-held clients. As of December 31, 2024, we have $22.2 million in notes receivable from CBIZ CPAs. Certain prior period amounts have been reclassified to conform to current year's presentation. Significant Accounting Policies - We consider the following policies to be beneficial in understanding the judgments that are involved in the preparation of our consolidated financial statements and the uncertainties that could impact our financial condition, results of operations and cash flows. Use of Estimates - The preparation of consolidated financial statements in conformity with GAAP and pursuant to the rules and regulations of the SEC requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Management’s estimates and assumptions are derived from and are continually evaluated based upon available information, judgment and experience. Actual results may differ materially from these estimates. Revenue Recognition - We account for revenue in accordance with Topic 606, Revenue from Contracts with Customers. We recognize revenue based on the five-step model; (i) identify the contract with the customer; (ii) identify the performance obligation in the contract; (iii) determine the contract price; (iv) allocate the transaction price; and (v) recognize revenue as each performance obligation is satisfied. If we determine that a contract with enforceable rights and obligations does not exist, revenues are deferred until all criteria for an enforceable contract are met. For further information on our various streams of revenue, refer to Note 3, Revenue, to the accompanying consolidated financial statements. Operating Expenses - Operating expenses represent costs of service and other costs incurred to operate our business units and are primarily comprised of personnel costs and occupancy related expenses. Personnel costs include (i) salaries and benefits; (ii) commissions paid to producers; (iii) incentive compensation; and (iv) share-based compensation. Incentive compensation costs and share-based compensation are estimated and accrued. The final determination of incentive compensation is made after year-end results are finalized. The largest components of occupancy costs are rent expense and utilities. Base rent expense is recognized over respective lease terms, while utilities and common area maintenance charges are recognized as incurred. Share-Based Compensation - The measurement of all share-based compensation arrangements is based on their respective grant date fair value. The grant date fair value of restricted stock awards and restricted stock units is based on the closing price of the underlying stock on the date of issuance. The grant date fair value of the performance share units is based on the closing price of the underlying stock on the date of issuance and recorded based on achievement of target performance metrics. The expense related to restricted stock awards and restricted stock units is recognized over the requisite service period which is generally three Share-based compensation expense is recorded in the accompanying Consolidated Statements of Comprehensive Income as “Operating expenses” or “Corporate general and administrative expenses,” depending on where the respective individual’s compensation is recorded. For additional discussion regarding share-based awards, refer to Note 15, Employee Stock Plans, to the accompanying consolidated financial statements. Operating Leases - We determine if a contract is a lease at inception. We have leases for office space and facilities, automobiles, and certain information technology equipment. Certain of these leases include options to extend the lease and some include options to terminate the lease early. As an accounting policy election, we elected not to apply the recognition requirements to short term leases (a lease at commencement date that has a lease term of 12 months or less and does not contain a purchase option that we are reasonably certain to exercise). The ROU assets and lease liabilities are recognized as of the commencement date based on the present value of the lease payments over the lease term. The discount rate utilized for the measurement purpose is based on our secured fixed rate to borrow over a comparable term for the lease because the rate implicit in the lease is not determinable. The lease term may include the options to extend or terminate the lease when it is reasonably certain that we will exercise the applicable option. Related rent expense under such leases is recognized evenly throughout the term of the lease when the total lease commitment is a known amount, and recorded on an as incurred basis when future rent payment increases under the obligation are unknown due to rent escalations being tied to factors that are not currently measurable (such as increases in the consumer price index). Differences between rent expense recognized and the cash payments required under these leases are recorded as a component of “Lease liability” in the current and non-current liabilities sections of the accompanying Consolidated Balance Sheets. We may receive incentives to lease office facilities in certain areas. Such incentives are recorded as a change in lease payments and may require us to remeasure the lease liability to reflect the change in lease payments. Cash and Cash Equivalents - Cash and cash equivalents consist of cash on hand and investments with an original maturity of three months or less when purchased. Restricted Cash - Restricted cash consists of funds held by us in relation to our capital and investment advisory services as those funds are restricted in accordance with applicable Financial Industry Regulatory Authority regulations. Restricted cash also consists of funds on deposit from clients in connection with the pass-through of insurance premiums to the carrier with the related liability for these funds recorded in “Accounts payable” in the accompanying Consolidated Balance Sheets. Accounts Receivable and Allowance for Doubtful Accounts - Accounts receivable, less allowances for doubtful accounts, reflects the net realizable value of receivables and approximates fair value. Unbilled revenues are recorded at estimated net realizable value. Assessing the collectability of receivables (billed and unbilled) requires management judgment based on a combination of factors. When evaluating the adequacy of the allowance for doubtful accounts and the overall probability of collecting on receivables, we analyze historical experience, client credit-worthiness, the age of the trade receivable balances, current economic conditions that may affect a client’s ability to pay and current and projected economic trends and conditions at the balance sheet date. At December 31, 2024 and 2023, the allowance for doubtful accounts was $31.7 million and $25.6 million, respectively, in the accompanying Consolidated Balance Sheets. Funds Held for Clients and Client Fund Obligations - Services provided by our payroll operations include the preparation of payroll checks, federal, state, and local payroll tax returns, and flexible spending account administration. In relation to these services, as well as other similar service offerings, we collect funds from our clients’ accounts in advance of paying client obligations. These funds, collected before they are due, are segregated and invested in accordance with our investment policy, which requires all investments carry an investment grade rating at the time of initial investment. These investments, primarily consisting of corporate and municipal bonds and U.S. treasury bills, are classified as available-for-sale and are included in the “Funds held for clients” line item on the accompanying Consolidated Balance Sheets. The underlying obligation is recorded as “Client fund obligations” on the Consolidated Balance Sheets. The balances in these accounts fluctuate with the timing of cash receipts and the related cash payments and may vary significantly during the year based on the timing of client’s payroll periods. Other than certain federal and state regulations pertaining to flexible spending account administration, there are no regulatory or other contractual restrictions placed on these funds. Refer to Note 7, Financial Instruments, to the accompanying consolidated financial statements for further discussion of investments related to funds held for clients. Property and Equipment - Property and equipment are recorded at cost less accumulated depreciation and amortization. Depreciation and amortization are provided on a straight-line basis over the following estimated useful lives: Buildings 25 to 40 years Furniture and fixtures 5 to 10 years Capitalized software 3 to 5 years Equipment 3 to 7 years Leasehold improvements are amortized using the straight-line method over the shorter of their estimated useful lives or the remaining respective lease term. The cost of software purchased or developed for internal use is capitalized and amortized using the straight-line method over an estimated useful life not to exceed five years. We periodically review long-lived assets for impairment whenever events or changes in business circumstances indicate that the carrying value of the assets may not be recoverable. Under those circumstances, if the fair value were less than the carrying amount of the asset, we would recognize a loss for the difference. Goodwill and Other Intangible Assets - Goodwill represents the excess of the purchase price of the acquired businesses over the related fair value of the net assets acquired. At December 31, 2024, the carrying value of goodwill totaled $2.3 billion, compared to total assets of $4.5 billion and total stockholders’ equity of $1.8 billion. Intangible assets consist of identifiable intangibles other than goodwill. Identifiable intangible assets other than goodwill include client lists and non-compete agreements which require significant judgments in determining the fair value. We carry client lists and non-compete agreements at cost, less accumulated amortization, in the accompanying Consolidated Balance Sheets. Goodwill is reviewed for impairment annually during the fourth quarter or more frequently in the event of an impairment indicator. We are required to consider whether it is more likely than not (defined as a likelihood of more than 50%) that the fair value of each reporting unit has fallen below its carrying value, thus requiring us to perform an interim goodwill impairment test. Intangible assets with definite lives, such as client lists and non-compete agreements, are amortized using the straight-line method over their estimated useful lives (generally ranging from three The goodwill impairment test is performed at a reporting unit level. A reporting unit is an operating segment of a business or one level below an operating segment. At December 31, 2024, we had six reporting units carrying goodwill balances, of which one is a new reporting unit resulting from the Transaction. The new reporting unit was added to align the internal reporting structure with services provided by the three practice groups. As of December 31, 2024, the amount of goodwill assigned to this reporting unit is subject to change upon the finalization of the purchase price allocation. Refer to Note. 2 Business Combinations for detailed discussion of the Transaction. We may use either a qualitative or quantitative approach when testing a reporting unit’s goodwill for impairment. Under the qualitative assessment, we are not required to calculate the fair value of a reporting unit unless we determine that it is more likely than not that its fair value is less than its carrying amount. If under the quantitative assessment the fair value of a reporting unit is less than its carrying amount, then the amount of the impairment loss, if any, must be measured. Any such impairment charge would reduce earnings and could be material. After considering changes to assumptions used in our most recent quantitative testing for each reporting unit, including the capital market environment, economic and market conditions, industry competition and trends, our weighted average cost of capital, changes in management and key personnel, the price of our common stock, changes in our results of operations, the magnitude of the excess of fair value over the carrying amount of each reporting unit as determined in our most recent quantitative testing, and other factors, we concluded that it was more likely than not that the fair values of each of our reporting units exceeded their respective carrying values and, therefore, did not perform a quantitative impairment analysis. For further information regarding our goodwill balances, refer to Note 6, Goodwill and Other Intangible Assets, net, to the accompanying consolidated financial statements. Income Taxes - Income taxes are provided for the tax effects of transactions reported in the consolidated financial statements and consist of taxes currently payable and deferred taxes. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax basis, and operating losses and tax credit carryforwards. State income tax credits are accounted for using the flow-through method. A valuation allowance is provided when it is more-likely-than-not that all or some portion of a deferred tax asset will not be realized. We determine valuation allowances based on all available evidence. Such evidence includes historical results, the reversal of deferred tax liabilities, expectations of future consolidated and/or separate company profitability and the feasibility of tax-planning strategies. Determining valuation allowances includes significant judgment by management, and different judgments could yield different results. Accounting for uncertain tax positions requires a more-likely-than-not threshold for recognition in the consolidated financial statements. We recognize a tax benefit based on whether it is more-likely-than-not that a tax position will be sustained. We record a liability to the extent that a tax position taken or expected to be taken on a tax return exceeds the amount recognized in the consolidated financial statements. Business Combinations - We recognize and measure identifiable tangible and intangible assets acquired and liabilities assumed as of the acquisition date at fair value. Fair value measurements require extensive use of estimates and assumptions, including estimates of future cash flows to be generated by the acquired assets. The operating results of acquired businesses are included in our consolidated financial statements beginning on the date of acquisition. The purchase price is equivalent to the fair value of consideration transferred. Goodwill is recognized for the excess of purchase price over the net fair value of assets acquired and liabilities assumed. Contingent Purchase Price Liabilities - Contingent purchase price liabilities consisting of cash payments and common stock issuances resulting from our business acquisitions are recorded at fair value at the time of acquisition as “Contingent purchase price liability - current” and “Contingent purchase price liability - non-current” in the accompanying Consolidated Balance Sheets. We estimate the fair value of our contingent purchase price liabilities using a probability-weighted discounted cash flow model. We probability weight risk-adjusted estimates of future performance of acquired businesses, then calculate the contingent purchase price based on the estimates and discount them to present value representing management’s best estimate of fair value. The fair value of the contingent purchase price liabilities, which is considered a Level 3 unobservable input, is reassessed on a quarterly basis based on assumptions provided by practice group leaders and business unit controllers together with our corporate finance department. Any change in the fair value estimate, including the revaluation of common stock, is recorded in the earnings of that period. For the years ended December 31, 2024, 2023 and 2022, we recorded other expense of $7.0 million, $2.7 million and $2.4 million, respectively, related to net changes in the fair value of contingent consideration. Refer to Note 8, Fair Value Measurements, and Note 2, Business Combinations, for further discussion of our contingent purchase price liabilities and acquisitions. Interest Rate Derivative Instruments - We maintain interest rate swaps that are designated as cash flow hedges to manage the market risk from changes in interest rates on our floating-rate debt under our $2.0 billion unsecured credit facility, by and among CBIZ Operations, Inc., CBIZ, Inc. and Bank of America, N.A., as administrative agent and bank, and other participating banks. The designation of a derivative instrument as a hedge and its ability to meet the hedge accounting criteria determine how we reflect the change in fair value of the derivative instrument. A derivative qualifies for hedge accounting treatment if, at inception, it meets defined correlation and effectiveness criteria. These criteria require that the anticipated cash flows and/or changes in fair value of the hedging instrument substantially offset those of the position being hedged. We utilize derivative instruments to manage interest rate risk associated with our floating-rate debt under the credit facility. Interest rate swap contracts mitigate the risk associated with the underlying hedged item. If the contract is designated as a cash flow hedge, the mark-to-market gains or losses on the swap are deferred and included as a component of accumulated other comprehensive income, net of tax, to the extent effective, and reclassified to interest expense in the same period during which the hedged transaction affects earnings. For further discussion regarding derivative financial instruments, refer to Note 7, Financial Instruments, to the accompanying consolidated financial statements. Recent Accounting Pronouncements - The FASB ASC is the sole source of authoritative GAAP other than the SEC issued rules and regulations that apply only to SEC registrants. The FASB issues an ASU to communicate changes to the FASB codification. We assess and review the impact of all ASUs. ASUs not listed below were reviewed and determined to be either not applicable or are not expected to have a material impact on the consolidated financial statements. Accounting Standards Adopted in 2024 In November 2023, the FASB issued ASU No. 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures, which improves reportable segment disclosure requirements, primarily through enhanced disclosure about significant segment expenses. We adopted ASU No. 2023-07 for the annual reporting period ending December 31, 2024, and disclosure of the significant segment expenses can be found in Note 19, Segment Disclosure, for the years ended December 31, 2024, 2023 and 2022. Accounting Standards Issued But Not Yet Adopted In December 2023, the FASB issued ASU No. 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures, which requires disaggregated information about an entity's effective tax rate reconciliation as well as information on income tax paid. The guidance in this ASU is effective for public companies with annual periods beginning after December 15, 2024. We plan to adopt the guidance for the fiscal year ending December 31, 2025. We are currently evaluating the effect adoption of this ASU will have on our consolidated financial statements

BUSINESS COMBINATIONS

BUSINESS COMBINATIONS	12 Months Ended
	Dec. 31, 2024
Business Combination, Asset Acquisition, and Joint Venture Formation [Abstract]
BUSINESS COMBINATIONS	BUSINESS COMBINATIONS Acquisition of Marcum LLP On November 1, 2024, the Company completed the acquisition of Marcum LLP (“Marcum”), an accounting and advisory services firm headquartered in New York City with offices in major markets throughout the United States, to expand the breadth and depth of the Company’s professional services portfolio in the U.S. Pursuant to the Agreement and Plan of Merger dated July 30, 2024 (the “Merger Agreement”), a wholly owned subsidiary of the Company (“Merger Sub”) merged with and into Marcum Advisory Group, a wholly owned subsidiary of Marcum ("MAG"), to which Marcum contributed substantially all of its non-attest business assets and liabilities, (the “Merger”), resulting in MAG surviving the Merger and becoming a wholly owned subsidiary of the Company. In a separate transaction, CBIZ CPAs P.C., with which the Company has an existing ASA, purchased from Marcum substantially all of Marcum’s attest business assets, subject to certain exclusions (the "Attest Purchase"). As noted in Note 1, Basis of Presentation and Significant Accounting Policies, the Company does not consolidate certain CPA firms with whom we maintain ASAs, including CBIZ CPAs P.C., therefore, the Merger solely is referred to herein as the “Transaction”. During the period from the acquisition date of Transaction through December 31, 2024, the Company's consolidated results of operations included $108.9 million of revenues and $57.1 million of operating losses, including $8.9 million of intangible assets amortization associated with the results of operations of Marcum. Summary of Consideration Transferred At closing, the purchase price for the purpose of the Merger consisted of an aggregate of $1,063.0 million of net cash consideration and $934.7 million of the Company’s common stock, which represents a fair value of 13.6 million shares issued as stock consideration. Fair Value of Purchase Consideration Cash consideration (1) $ 1,063,037 Share consideration (2) 934,744 Total $ 1,997,781 (1) Reflects the amount of cash consideration, which is equal to the Cash Payment Amount of $1,142.4 million as defined in the Merger Agreement, adjusted for the assumed indebtedness as outlined in the Merger Agreement, consisting of contingent consideration expected to be paid within 18 months of close, earned bonuses for Marcum employees, certain specific deferred revenue balances, and adjustments for certain lease liabilities, plus Marcum's finance lease obligations settled by the Company at close. (2) Reflects the fair value of 13.6 million shares to be issued as Transaction consideration. As defined in the Merger Agreement, the total number of shares to be issued was calculated on November 1, 2024, using the Base Purchase Price of $2,247.7 million less the Cash Payment Amount, assumed liabilities expected to be paid subsequent to 18-months after the closing date, and an adjustment for net working capital and deposit balances divided by $76.84, to arrive at 14.3 million shares. The total number of shares is fixed on November 1, 2024, the closing date of the Transaction. Of the 14.3 million shares, approximately 0.7 million shares represent the share-based compensation awards which are subject to continued service requirements and therefore are not included in Transaction consideration. The remaining 13.6 million shares constitute the share consideration and are included in Transaction consideration, of which approximately 3.1 million shares were delivered on January 2, 2025 and 0.3 million shares were delivered on February 3, 2025. The remaining 10.2 million shares will be delivered in 34 monthly installments starting on March 3, 2025. The estimated fair value of this deferred share consideration was estimated using a Monte Carlo simulation (“MC Simulation”). In the MC Simulation, the stock price is assumed to follow a Geometric Brownian Motion, using the following key assumptions: term of 3.1 years consistent with the issuance schedule outlined in the Merger Agreement, risk-free rate, stock price as of October 31, 2024, and volatility of 35% based on the weekly historic volatility observed in the Company and guideline companies. The Company fully financed the Cash consideration for the Transaction by borrowing under its 2024 Credit Facilities, as described in Note 10, Debt and Financing Arrangements. The Company has applied the acquisition method of accounting in accordance with ASC 805, Business Combinations (“ASC 805”) and recognized assets acquired and liabilities assumed at their fair value as of the date of acquisition, with the excess purchase consideration recorded to goodwill. As the Company finalizes the estimation of the fair value of the assets acquired and liabilities assumed, additional adjustments may be recorded during the measurement period (a period not to exceed 12 months from the acquisition date). The following table summarizes the preliminary acquisition date fair value of net tangible and intangible assets acquired, net of liabilities assumed from Marcum, with the excess recorded as goodwill (in thousands): On November 1, 2024 Fair Value Total consideration transferred $ 1,997,781 Asset acquired: Account receivable 170,139 Unbilled revenue 23,247 Other current assets 25,914 Property and equipment 31,292 Other intangible assets 490,000 Right-of- use asset 164,970 Deferred income taxes, net 3,427 Total identifiable asset acquired 908,989 Liabilities assumed: Account payable 25,370 Accrued personnel costs 44,650 Other current liabilities 27,267 Contingent purchase price assumed (current and non-current) 24,232 Lease liabilities (current and non-current) 172,792 Other non-current liabilities 61,967 Total liabilities assumed 356,278 Net asset acquired 552,711 Goodwill $ 1,445,070 The preliminary purchase price allocation is subject to further refinement and may require adjustments to arrive at the final purchase price allocation. The above fair values of assets acquired and liabilities assumed are preliminary and are based on the information that was available as of the reporting date. The final determination of the fair value of certain assets and liabilities will be completed as soon as the necessary information, such as final working capital adjustments, becomes available but no later than one year from the acquisition date. Goodwill Goodwill is calculated as the difference between the aggregated purchase price and the fair value of the net assets acquired. Goodwill represents the value of expected future earnings and cash flows, as well as the synergies created by the integration of the new businesses within our organization, including cross-selling opportunities expected with our Financial Services practice group and the Benefits and Insurance Services practice group, to help strengthen our existing service offerings and expand our market position, the enhanced expertise and experiences from the assembled workforce acquired, as well as operating efficiencies and cost savings. As of November 1, 2024, the amount of goodwill deductible for income tax purposes was approximately $379.5 million. The amount of goodwill deductible for tax purposes is expected to fluctuate as the share considerations are delivered to the sellers. As of November 1, 2024, we recognized $1,445.1 million goodwill of which $1,433.5 million was allocated to the Financial Services practice group and $11.6 million was allocated to the Benefit and Insurance Services practice group on a provisional basis. Identifiable Intangible Assets Acquired The following table summarizes key information underlying identifiable intangible assets related to the Transaction (in thousands): Weighted Average Useful Life (in years) Fair Value Client lists 10.0 $ 474,000 Non-competition agreements 3.0 16,000 Unfavorable leaseholds, net 7.9 (7,822) Total $ 482,178 The preliminary estimate of the fair value of the identifiable intangible assets was determined using the methods described below. The fair value measurements were primarily based on significant inputs that are not observable in the market and thus represent a Level 3 measurement of the fair value hierarchy as defined in ASC 820, Fair Value Measurements (“ASC 820”). Intangible assets consist of acquired customer relationships and non-competition agreements. ◦ Client list intangible assets were valued using the excess earnings method. The excess earning method of valuation is an approach where the net earnings attributable to the asset being measured are isolated from other “contributory assets” over the intangible asset’s remaining economic life. ◦ Non-competition agreements intangible assets were valued using the discounted earnings method, specifically the with and without method. The with and without method of valuation is an approach that considers the hypothetical impact to the projected cash flows of the business if the intangible asset was not in place. ◦ Unfavorable leaseholds, net are valued using the discounted cash flow approach. The discounted cash flow approach method of valuation is an approach that compares the future contract rents of acquired leases with the projected market rents. If the lease terms are favorable compared to the market, the Company records an asset. If the lease terms are unfavorable as compared to the market, the Company records a liability. Deferred Income Taxes The preliminary purchase allocation includes net deferred tax assets of $3.4 million, primarily related to the deferred taxes established on the right-of-use asset and lease liabilities associated with the operating leases, deferred revenue liabilities, and deferred performance obligations. Pro Forma Financial Information The following table summarizes, on an unaudited pro forma basis, the condensed combined results of operations of the Company for the year ended December 31, 2024 and 2023, assuming the Transaction had occurred on January 1, 2023 (in thousands). For the year ended December 31, 2024 2023 Net Sales $ 2,790,091 $ 2,698,828 Net Income $ 111,015 $ 88,371 The foregoing unaudited pro forma amounts have been presented for informational purposes only and are not necessarily indicative of what CBIZ’s results of operations actually would have been had the Transaction been completed on January 1, 2023. In addition, the unaudited pro forma income statements do not intend to project the future operating results of the Company. The unaudited pro-forma information for all periods presented includes the following adjustments, where applicable, for business combination accounting effects resulting from the Transaction: i. additional amortization expense related to intangible assets acquired and net unfavorable leases, ii. additional salary and bonus for Marcum’s partners which have been recognized in equity historically iii. incremental interest expense as a result of Transaction financing and pay down of historical debt of Marcum and the Company iv. adjustment to conform Marcum's process of estimating unbilled revenue at net realizable value to the accounting policy utilized by the Company, v. incremental expense for the performance bonuses and the tail insurance policy as a result of the Transaction, vi. the related tax effects assuming that the Transaction occurred on January 1, 2023. Additionally, the pro forma adjustments also include acquisition related transaction costs of $28.7 million incurred by the Company. These expenses are included in Corporate general and administrative expenses on the Company’s Consolidated Statements of Comprehensive Income for the year ended December 31, 2024 and are reflected in pro forma earnings for the year ended December 31, 2023 in the table above. The majority of the operating results of Marcum are reported in the Financial Services Practice group and the remainder of the operating results are reported in the Benefit and Insurance Services practice group. Other Acquisitions During the years ended December 31, 2024 and 2023, in addition to the Transaction discussed above, we also completed the following immaterial acquisitions: • Effective February 1, 2024, we acquired all of the assets of Erickson, Brown & Kloster LLC ("EBK"). EBK, based in Colorado Springs, Colorado, is a provider of a full range of accounting, tax, and financial advisory services to clients in a wide array of industries. Operating results for EBK are reported in the Financial Services practice group. • Effective March 1, 2024, we acquired all the assets of CompuData, Inc ("CompuData"). CompuData, based in Philadelphia, Pennsylvania, is a provider of technology services and solutions, such as Cloud Hosting, ERP Solutions, IT Security and Managed IT Services. Operating results for CompuData are reported in the Financial Services practice group. • Effective June 1, 2024, we acquired all of the assets of Educational & Institutional Insurance Administrators, Inc ("EIIA"). EIIA, based in Chicago, Illinois, is a provider of private higher education specific insurance and risk management programs and services. Operating results for EIIA are reported in the Benefits and Insurance practice group. • Effective October 1, 2024, we acquired all of the assets of Hoover Financial Advisors, Inc ("Hoover"). Hoover, based in Indianapolis, Indiana, is a provider of financial planning advice for individuals, families, and small businesses. Operating results of Hoover are reported in the Benefits and Insurance Services practice group. • Effective January 1, 2023, we acquired all of the assets of Danenhauer and Danenhauer, Inc. ("Danenhauer and Danenhauer"). Danenhauer and Danenhauer, based in California, is a provider of forensic accounting, business valuation, expert witness testimony, and other services for businesses and individuals. Operating results for Danenhauer and Danenhauer are reported in the Financial Services practice group. ◦ Effective February 1, 2023, we acquired the non-attest assets of Somerset CPAs and Advisors ("Somerset"). Somerset, based in Indianapolis, Indiana, is a provider of a full range of accounting, tax, and financial advisory services to clients in a wide array of industries. Operating results for Somerset are reported in the Financial Services practice group. ◦ Effective June 1, 2023, we acquired all of the assets of Pivot Point Security ("PPS"). PPS, based in Hamilton, New Jersey, is a provider of cyber and information security, and compliance services for small and middle market businesses. Operating results for PPS are reported in the Financial Services practice group. ◦ Effective June 1, 2023, we acquired all of the assets of Ickovic and Co. PC ("Ickovic and Co."). Ickovic and Co., based in Denver, Colorado, is a provider of bespoke services and solutions for high-net-worth individuals, business owners and executives. Operating results for Ickovic and Co. are reported in the Financial Services practice group. ◦ Effective July 1, 2023, we acquired all of the assets of American Pension Advisors, Ltd. ("APA"). APA, based in Indianapolis, Indiana, is a provider of full-service retirement plan consulting and administration assisting more than 1,200 clients in the design, implementation, and administration of all types of retirement plans including 401(k), 403(b), 457(b), defined benefit and cash balance. Operating results for APA are reported in the Benefits and Insurance Services practice group. Total purchase price consideration for the acquisitions of EBK, CompuData, EIIA, and Hoover (together, the “Other 2024 Acquisitions”) was $42.2 million, of which $24.0 million was paid in cash, $2.4 million in our Common Stock, and $15.8 million in contingent purchase considerations. The Other 2024 Acquisitions added approximately $28.7 million incremental revenue in 2024. Total purchase price consideration for the acquisitions of Danenhauer and Danenhauer, Somerset, PPS, Ickovic and Co., and APA (together, the "2023 Acquisitions") was $90.0 million, of which $53.0 million was paid in cash, $4.8 million in our Common Stock, and $32.1 million in contingent purchase considerations. The 2023 Acquisitions added approximately $64.9 million in incremental revenue in 2023. Pro forma results of operations for both the Other 2024 Acquisitions and the 2023 Acquisitions are not provided due to limitations in retrospective application of estimates to historical financial information as well as the immateriality of such information as compared to our total revenue and net income for year ended December 31, 2024 and 2023, respectively. The following table summarizes the aggregated goodwill and intangible asset amounts resulting from the Other 2024 Acquisitions and the 2023 Acquisitions for the twelve months ended December 31, 2024 and 2023, respectively (in thousands): Twelve Months Ended December 31, 2024 2023 Financial Services Benefits & Insurance Financial Services Benefits & Insurance Goodwill $ 25,237 $ 2,345 $ 41,322 $ 3,932 Client list 10,514 2,644 33,196 2,053 Other intangibles — — 18 — Total $ 35,751 $ 4,989 $ 74,536 $ 5,985 Goodwill from the Other 2024 Acquisitions and 2023 Acquisitions is calculated as the difference between the aggregated purchase price and the fair value of the net assets acquired. Goodwill represents the value of expected future earnings and cash flows, as well as the synergies created by the integration of the new businesses within our organization, including cross-selling opportunities expected with our Financial Services practice group and the Benefits and Insurance Services practice group, to help strengthen our existing service offerings and expand our market position, the enhanced expertise and experiences from the assembled workforce acquired, as well as operating efficiencies and cost savings. Client lists generally have an expected life of 10 years, and other intangibles, primarily non-compete agreements, have an expected life of 3 years. Client lists and non-compete agreements are valued using a discounted cash flow technique based on management estimates of future cash flows from such assets. Other Disclosures The following table summarizes the changes in contingent purchase price consideration for previous acquisitions and contingent payments made for previous business acquisitions during the year ended December 31, 2024 and 2023, respectively (in thousands): 2024 2023 Net expense 6,994 2,743 Cash settlement paid 56,594 45,010 Shares issued (number) 126 140

REVENUE

REVENUE	12 Months Ended
	Dec. 31, 2024
Revenue from Contract with Customer [Abstract]
REVENUE	REVENUE The following tables disaggregate our revenue by source (in thousands): For the Year Ended December 31, 2024 Financial Benefits and National Consolidated Accounting, tax, advisory and consulting $ 1,362,539 $ — $ — $ 1,362,539 Core Benefits and Insurance Services — 383,550 — 383,550 Non-core Benefits and Insurance Services — 17,498 — 17,498 Managed networking, hardware services — — 41,526 41,526 National Practices consulting — — 8,359 8,359 Total revenue $ 1,362,539 $ 401,048 $ 49,885 $ 1,813,472 For the Year Ended December 31, 2023 Financial Benefits and National Consolidated Accounting, tax, advisory and consulting $ 1,160,686 $ — $ — $ 1,160,686 Core Benefits and Insurance Services — 365,848 — 365,848 Non-core Benefits and Insurance Services — 16,757 — 16,757 Managed networking, hardware services — — 36,984 36,984 National Practices consulting — — 10,919 10,919 Total revenue $ 1,160,686 $ 382,605 $ 47,903 $ 1,591,194 For the Year Ended December 31, 2022 Financial Benefits and National Consolidated Accounting, tax, advisory and consulting $ 1,010,068 $ — $ — $ 1,010,068 Core Benefits and Insurance Services — 342,063 — 342,063 Non-core Benefits and Insurance Services — 15,944 — 15,944 Managed networking, hardware services — — 33,503 33,503 National Practices consulting — — 10,401 10,401 Total revenue $ 1,010,068 $ 358,007 $ 43,904 $ 1,411,979 Financial Services Revenue primarily consists of professional service fees derived from traditional accounting services, tax return preparation, administrative services, financial and risk advisory, consulting, valuation, and IT services. Clients are billed for these services based upon a fixed-fee, an hourly rate, or an outcome-based fee. Time related to the performance of all services is maintained in a time and billing system. Revenue for fixed-fee arrangements is recognized over time with the performance obligation measured in hours worked and anticipated realization. Anticipated realization is defined as the fixed fee divided by the product of the hours anticipated to complete a performance obligation and the standard billing rate. Anticipated realization rates are applied to hours charged to a contract when recognizing revenue. At the end of each reporting period, we evaluate the work performed to date to ensure that the amount of revenue recognized in each reporting period for the client arrangement is equal to the performance obligations met. Time and expense arrangement revenue is recognized over time with progress measured towards completion with value being transferred through our hourly fee arrangement at expected net realizable rates per hour, plus agreed-upon out-of-pocket expenses. The cumulative impact on any subsequent revision in the estimated realizable value of unbilled fees for a particular client project is reflected in the period in which the change becomes known. Prior to recognizing revenue for outcome-based arrangement, we estimate the transaction price, including variable consideration that is subject to a constraint based on risks specific to the arrangement. We evaluate the estimate in each reporting period and recognize revenue to the extent it is probable that a significant reversal of revenue will not occur. Revenue is recognized when the constraint is lifted at a point in time when the value is determined and verified by a third party. Benefits and Insurance Services Benefits and Insurance Services provides brokerage and consulting along lines of service which include group health benefits consulting and brokerage, property and casualty brokerage, retirement plan advisory, payroll, human capital management, actuarial, life insurance and other related services. Revenue consists primarily of fee income for administering health and retirement plans and brokerage commissions. Revenue also includes investment income related to client payroll funds that are held in CBIZ accounts, as is industry practice. We pay commissions monthly and require the recipient of the commission to be employed as of the end of the month in which the commissions are earned (as opposed to at the time of actual payment). Failure to remain employed at the date the commission is payable results in the forfeiture of commissions that would otherwise be due. Therefore, we have determined that the requirement of continued employment is substantive and accordingly, do not consider the commissions to be incremental costs of obtaining the customer contract and consequently a contract acquisition cost is not recognized for those commissions. Revenue related to group health benefits consulting consists of (i) commissions, (ii) fee income which can be fixed or variable based on a price per participant and (iii) contingent revenue. • Commission revenue and fee income are recognized over the contract period as these services are provided to clients continuously throughout the term of the arrangement. Our customers benefit from each month of service on its own and although volume and the number of participants may differ month to month, our obligation to perform substantially remains the same. • Contingent revenue arrangements are related to carrier-based performance targets. Due to the uncertainty of the outcome and the probability that a change in estimate would result in a significant reversal of revenue, we have applied a constraint on recording contingent revenue. Revenue is recognized when the constraint has been lifted which is the earlier of written notification from a carrier that the target has been achieved or cash collection. Contingent revenue is not a significant revenue stream to our consolidated financial position or results of operations. Revenue related to property and casualty consists of (i) commissions and (ii) contingent revenue. • Commissions relating to agency billing arrangements (pursuant to which we bill the insured, collect the funds and forward the premium to the insurance carrier less our commission) and direct billing arrangements (pursuant to which the insurance carrier bills the insured directly and forwards the commission to us) are both recognized on the effective date of the policy. Commission revenue is reported net of reserves for estimated policy cancellations and terminations. The cancellation and termination reserve is based upon estimates and assumptions using historical cancellation and termination experience and other current factors to project future experience. • Contingent revenue arrangements related to carrier-based performance targets include claim loss experience and other factors. Due to the uncertainty of the outcome and the probability that a change in estimate would result in a significant reversal of revenue, we have applied a constraint on recording contingent revenue. Revenue is recognized when the constraint has been lifted which is the earlier of written notification from a carrier that the target has been achieved or cash collection. Contingent revenue is not a significant revenue stream to our consolidated financial position or results of operations. Revenue related to retirement plan services consist of advisory, third party administration and actuarial services. • Advisory revenue is either (i) based on the value of assets under management, as provided by a third party, multiplied by an agreed upon rate, (ii) fee based, or (iii) a combination of fixed fee and value of assets under management. Advisory services revenue, derived from the value of assets under management, is calculated monthly or quarterly based on the estimated value of assets under management, as it is earned over the duration of the reporting period and relates to performance obligations satisfied during that period. The variability related to the estimated asset values used to recognize revenue during the reporting period is resolved and the amount of related revenue recognized is adjusted when the actual value of assets under management is known. Fee based Advisory revenue is recognized over the contract period as these services are provided to clients continuously throughout the term of the arrangement. Our clients benefit from each month of service on its own, and although the volume of tasks may differ month to month, our obligation to perform substantially remains the same. • Third party administration revenue is recognized over the contract period as these services are provided to clients continuously throughout the term of the arrangement. Our clients benefit from each month of service on its own, and although the volume of tasks may differ month to month, our obligation to perform substantially remains the same. • Actuarial revenue is recognized over the contract period with performance measured in hours in relation to the expected total hours. Under certain defined benefit plan administration arrangements, we charge new clients an initial, non-refundable, set-up fee as part of a multi-year service agreement. Revenue and costs related to the set-up fees are deferred and recognized over the life of the contract or the expected customer relationship, whichever is longer. Revenue related to payroll processing consists of a (i) fixed fee or (ii) variable fee based on a price per employee or check processed. Revenue is recognized when the actual payroll processing occurs. Our customers benefit from each month of service on its own and although volume and the variability may differ month to month, our obligation to perform substantially remains the same. Non-core Benefits and Insurance Services consists of transactional businesses that tend to fluctuate. These include life insurance, talent and compensation services. National Practices Managed networking, hardware services revenue consists of installation, maintenance and repair of computer hardware. These services are charged to a single customer based on cost plus an agreed-upon markup percentage, which has existed since 1999. National Practices consulting revenue is based upon a fixed fee, an hourly rate, or outcome-based. Revenue for fixed fee and time and expense arrangements is recognized over the performance period based upon actual hours incurred, while revenue for outcome-based arrangements is recognized similar to the outcome-based arrangements in the Financial Services practice group. Transaction Price Allocated to Future Obligations - The revenue recognition standard requires the disclosure of the aggregate amount of transaction price allocated to performance obligations that have not yet been satisfied as of the reporting date. The guidance provides certain practical expedients that limit this requirement, including performance obligations that are part of a contract that is one year or less. Since the majority of our contracts are one year or less, we have applied this practical expedient related to quantifying remaining performance obligations. In regards to contracts with terms in excess of one year, certain contract periods related to our government healthcare consulting, group health and benefits consulting, and property and casualty insurance businesses have an original specified contract duration in excess of one year, however, the agreements provide CBIZ and the client with the right to cancel or terminate the contract with no substantial penalty. We have applied the provisions of Topic 606 and the FASB Transition Resource Group memo number 10-14, and note that the definition of contract duration does not extend beyond the goods and services already transferred for contracts that provide both the Company and the client with the right to cancel or terminate the contract with no substantial penalty.

ACCOUNTS RECEIVABLE, NET

ACCOUNTS RECEIVABLE, NET	12 Months Ended
	Dec. 31, 2024
Receivables [Abstract]
ACCOUNTS RECEIVABLE, NET	ACCOUNTS RECEIVABLE, NET Accounts receivable, net balances at December 31, 2024 and 2023 were as follows (in thousands): 2024 2023 Trade accounts receivable $ 416,211 $ 309,640 Unbilled revenue, at net realizable value 150,362 96,110 Total accounts receivable 566,573 405,750 Allowance for doubtful accounts (31,715) (25,598) Accounts receivable, net $ 534,858 $ 380,152 Changes in the allowance for doubtful accounts on accounts receivable are as follows (in thousands): 2024 2023 2022 Balance at beginning of period $ (25,598) $ (20,801) $ (16,158) Provision (19,979) (13,681) (13,545) Charge-offs, net of recoveries 13,862 8,884 8,902 Balance at end of period $ (31,715) $ (25,598) $ (20,801)

PROPERTY AND EQUIPMENT, NET

PROPERTY AND EQUIPMENT, NET	12 Months Ended
	Dec. 31, 2024
Property, Plant and Equipment [Abstract]
PROPERTY AND EQUIPMENT, NET	PROPERTY AND EQUIPMENT, NET Property and equipment, net at December 31, 2024 and 2023 consisted of the following (in thousands): 2024 2023 Buildings and leasehold improvements $ 81,753 $ 58,537 Furniture and fixtures 44,192 36,039 Capitalized software 32,906 34,635 Equipment 45,365 39,398 Total property and equipment 204,216 168,609 Accumulated depreciation (116,053) (111,597) Property and equipment, net $ 88,163 $ 57,012 Depreciation expense for property and equipment was $15.3 million, $12.5 million and $11.2 million in 2024, 2023 and 2022, respectively.

GOODWILL AND OTHER INTANGIBLE A

GOODWILL AND OTHER INTANGIBLE ASSETS, NET	12 Months Ended
	Dec. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
GOODWILL AND OTHER INTANGIBLE ASSETS, NET	GOODWILL AND OTHER INTANGIBLE ASSETS, NET A summary of changes in the carrying amount of goodwill by operating segment for the years ended December 31, 2024 and 2023 were as follows (in thousands): Financial Benefits and National Total Gross $ 549,906 $ 320,125 $ 33,873 $ 903,904 Accumulated impairment (44,047) (7,733) (32,207) (83,987) Net at December 31, 2022 $ 505,859 $ 312,392 $ 1,666 $ 819,917 Additions 41,322 3,932 — 45,254 Divestitures and other adjustments 9 — — 9 Gross 591,237 324,057 33,873 949,167 Accumulated impairment (44,047) (7,733) (32,207) (83,987) Net at December 31, 2023 $ 547,190 $ 316,324 $ 1,666 $ 865,180 Additions 1,458,747 13,905 — 1,472,652 Divestitures and other adjustments (6,371) — — (6,371) Gross 2,043,613 337,962 33,873 2,415,448 Accumulated impairment (44,047) (7,733) (32,207) (83,987) Net at December 31, 2024 $ 1,999,566 $ 330,229 $ 1,666 $ 2,331,461 We review goodwill at the reporting unit level at least annually, as of November 1, for impairment. We had six reporting units at November 1, 2024. No goodwill impairment was recognized as a result of the annual evaluation. As a result of the Transaction, we recognized $1,445.1 million goodwill of which $1,433.5 million was allocated to the Financial Services practice group and $11.6 million was allocated to the Benefit and Insurance Services practice group on a provisional basis. The components of goodwill and other intangible assets, net at December 31, 2024 and 2023 were as follows (in thousands): 2024 2023 Goodwill $ 2,331,461 $ 865,180 Intangibles : Client lists 820,564 338,237 Other intangibles 32,481 11,481 Total intangibles 853,045 349,718 Total goodwill and other intangibles assets 3,184,506 1,214,898 Accumulated amortization: Client lists (227,943) (196,412) Other intangibles (11,093) (9,882) Total accumulated amortization (239,036) (206,294) Goodwill and other intangible assets, net $ 2,945,470 $ 1,008,604 Amortization expense for client lists and other intangible assets was $32.7 million, $23.8 million and $21.7 million in 2024, 2023 and 2022, respectively. The weighted-average useful lives of total intangible assets, client lists and other intangible assets were 9.1 years, 9.2 years and 6.3 years, respectively, as of December 31, 2024. Other intangible assets are amortized over periods ranging from 3 to 15 years. Based on the amount of intangible assets subject to amortization at December 31, 2024, the estimated amortization expense is $75.1 million for 2025, $73.1 million for 2026, $71.1 million for 2027, $64.6 million for 2028, $64.0 million for 2029, and $266.1 million thereafter.

FINANCIAL INSTRUMENTS

FINANCIAL INSTRUMENTS	12 Months Ended
	Dec. 31, 2024
Investments, All Other Investments [Abstract]
FINANCIAL INSTRUMENTS	FINANCIAL INSTRUMENTS The carrying amounts of our cash and cash equivalents, accounts receivable and accounts payable approximate fair value because of the short maturity of these instruments and are classified as Level 1 in the fair value hierarchy. The carrying value of bank debt approximates fair value, as the interest rate on the bank debt is variable and approximates current market rates. As a result, the fair value measurement of our bank debt is classified as Level 2 in the fair value hierarchy. Concentrations of Credit Risk - Financial instruments that may subject us to concentration of credit risk consist primarily of cash and cash equivalents and accounts receivable. We place our cash and cash equivalents with highly-rated financial institutions, limiting the amount of credit exposure with any one financial institution. Our client base consists of large numbers of geographically diverse customers dispersed throughout the United States; thus, concentration of credit risk with respect to accounts receivable is not significant. Available-For-Sale Debt Securities - Available-for-sale debt securities consist primarily of corporate and municipal bonds. The net par values of these securities total $41.3 million and $40.0 million at December 31, 2024 and 2023, respectively. The bonds have maturity dates or callable dates ranging from January 2025 through November 2027, and are included in “Funds held for clients — current” in the accompanying Consolidated Balance Sheets based on our intent and ability to sell these investments at any time under favorable conditions. At December 31, 2024 and December 31, 2023, unrealized losses on the securities were not material and have not been recognized as a credit loss because the bonds are investment grade quality and management is not required or does not intend to sell prior to an expected recovery in value. The bond issuers continue to make timely principal and interest payments. The following table summarizes our bond activity for the years ended December 31, 2024 and 2023 (in thousands): 2024 2023 Fair value at January 1 $ 39,459 $ 43,485 Purchases 23,210 14,122 Redemptions (500) (3,310) Maturities (21,423) (15,155) Change in bond premium (386) (1,099) Fair market value adjustment 639 1,416 Fair value at December 31 $ 40,999 $ 39,459 In addition to the available-for-sale securities discussed above, we also held other depository assets in the amount of $0.2 million and $1.0 million at December 31, 2024 and December 31, 2023, respectively. Those depository assets are classified as Level 1 in the fair value hierarchy. Interest Rate Swaps - We utilize interest rate swaps to manage interest rate risk exposure associated with our floating-rate debt under the 2024 Credit Facilities, or the forecasted acquisition of such liability. To mitigate counterparty credit risk, we only enter into contracts with selected major financial institutions with investment grade ratings and continually assess their creditworthiness. There are no credit risk-related contingent features in our interest rate swaps nor do the swaps contain provisions under which we would be required to post collateral. We do not purchase or hold any derivative instruments for trading or speculative purposes. The designation of a derivative instrument as a hedge and its ability to meet the hedge accounting criteria determine how we reflect the change in fair value of the derivative instrument. A derivative qualifies for hedge accounting treatment if, at inception, it meets defined correlation and effectiveness criteria. These criteria require that the anticipated cash flows and/or changes in fair value of the hedging instrument substantially offset those of the position being hedged. We had no fair value hedging instruments at December 31, 2024 or 2023. Our interest rate swaps are designated as cash flow hedges. Accordingly, the interest rate swaps are recorded as either an asset or liability in the accompanying Consolidated Balance Sheets at fair value. The mark-to-market gains or losses on the swaps are deferred and included as a component of accumulated other comprehensive income (“AOCI”), net of tax, to the extent the hedge is determined to be effective, and reclassified to interest expense in the same period during which the hedged transaction affects earnings. The interest rate swaps are assessed for effectiveness and continued qualification for hedge accounting on a quarterly basis. For the years ended December 31, 2024 and 2023, the interest rate swaps were deemed to be effective. CBIZ did not amend the interest rate swap agreements from under the 2024 Credit Facilities. The interest rate of the swaps are set to one-month term SOFR to align the swaps to term SOFR in the 2024 Credit Facilities. As of December 31, 2024, we have five interest rate swaps outstanding. Under the terms of the interest rate swaps, we pay interest at a fixed rate of interest plus applicable margin as stated in the amended agreements, and receive interest that varies with the one-month term SOFR. The following table summarizes our outstanding interest rate swaps and their classification in the accompanying Consolidated Balance Sheets at December 31, 2024 and 2023 (in thousands). Refer to Note 8, Fair Value Measurements, for additional disclosures regarding fair value measurements. December 31, 2024 Notional Fixed Rate Expiration Fair Balance Sheet Location Interest rate swap $ 50,000 0.834% 4/14/2025 $ 495 Other current asset Interest rate swap $ 30,000 1.186% 12/14/2026 $ 1,604 Other non-current asset Interest rate swap $ 20,000 2.450% 8/14/2027 $ 776 Other non-current asset Interest rate swap $ 25,000 3.669% 4/14/2028 $ 243 Other non-current asset Interest rate swap $ 25,000 4.488% 10/14/2028 $ (437) Other non-current liability December 31, 2023 Notional Fixed Rate Expiration Fair Balance Sheet Location Interest rate swap $ 50,000 0.834% 4/14/2025 $ 2,282 Other current asset Interest rate swap $ 30,000 1.186% 12/14/2026 $ 2,125 Other non-current asset Interest rate swap $ 20,000 2.450% 8/14/2027 $ 784 Other non-current asset Interest rate swap $ 25,000 3.669% 4/14/2028 $ (129) Other non-current liability Interest rate swap $ 25,000 4.488% 10/14/2028 $ (1,063) Other non-current liability During the next twelve months, the amount of the December 31, 2024, AOCI balance that will be reclassified to earnings is expected to be immaterial. The following table summarizes the effects of the interest rate swap on our accompanying Consolidated Statements of Comprehensive Income for the years ended December 31, 2024 and 2023 (in thousands): Gain recognized in Gain reclassified from Twelve Months Ended December 31, Twelve Months Ended December 31, Location 2024 2023 2024 2023 Interest rate swaps $ 2,396 $ 393 $ 4,513 $ 4,285 Interest expense

FAIR VALUE MEASUREMENTS

FAIR VALUE MEASUREMENTS	12 Months Ended
	Dec. 31, 2024
Fair Value Disclosures [Abstract]
FAIR VALUE MEASUREMENTS	FAIR VALUE MEASUREMENTS FASB ASC Topic 820, Fair Value Measurements and Disclosures, establishes a fair value hierarchy that requires us to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. Fair value is defined as the price that would be received on the sale of an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (exit price). The inputs used to measure fair value are classified into the following hierarchy: • Level 1 — Unadjusted quoted prices in active markets for identical assets or liabilities • Level 2 — Unadjusted quoted prices in active markets for similar assets or liabilities, or unadjusted quoted prices for identical or similar assets or liabilities in markets that are not active, or inputs other than quoted prices that are observable for the asset or liability • Level 3 — Unobservable inputs for the asset or liability We endeavor to utilize the best available information in measuring fair value. Financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. As circumstances change, we will reassess the level in which the inputs are included in the fair value hierarchy. For the years ended December 31, 2024 and 2023, there were no transfers between the valuation hierarchy Levels 1, 2 and 3. The following table summarizes our assets and (liabilities) at December 31, 2024 and 2023 that are measured at fair value on a recurring basis subsequent to initial recognition and indicates the fair value hierarchy of the valuation techniques utilized by us to determine such fair value (in thousands): Level December 31, 2024 December 31, 2023 Deferred compensation plan assets 1 167,170 143,499 Available-for-sale debt securities 1 40,999 39,459 Other depository assets 1 176 1,031 Deferred compensation plan liabilities 1 (167,170) (143,499) Interest rate swaps, net 2 2,681 3,999 Bank debt 2 (1,399,932) (310,826) Contingent purchase price liabilities 3 (96,967) (114,946) Contingent Purchase Price Liabilities - During the years ended December 31, 2024 and 2023, we recorded expense of $7.0 million and expense of $2.7 million, respectively, due to accretion, adjusting for expected results of acquired businesses and the revaluation of stock related to contingent payments. These changes are included in Other income (expense), net in the accompanying Consolidated Statements of Comprehensive Income. Refer to Note 2, Business Combinations, for further discussion of our acquisitions and contingent purchase price liabilities. The following table summarizes the change in fair value of our contingent purchase price liabilities identified as Level 3 for the years ended December 31, 2024 and 2023 (pre-tax basis, in thousands): Contingent Beginning balance — December 31, 2022 $ (132,010) Additions from business acquisitions (32,142) Settlement of contingent purchase price payable 51,949 Change in fair value of contingency 62 Change in net present value of contingency (2,805) Balance — December 31, 2023 $ (114,946) Additions from business acquisitions (40,034) Settlement of contingent purchase price payable 65,007 Change in fair value of contingency (4,710) Change in net present value of contingency (2,284) Balance — December 31, 2024 $ (96,967)

INCOME TAXES

INCOME TAXES	12 Months Ended
	Dec. 31, 2024
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES For financial reporting purposes, income before income taxes includes the following components (in thousands): 2024 2023 2022 United States $ 57,521 $ 165,869 $ 141,288 Foreign (Canada) 286 434 187 Total $ 57,807 $ 166,303 $ 141,475 Income tax expense included in the accompanying Consolidated Statements of Comprehensive Income for the years ended December 31, 2024, 2023 and 2022 was as follows (in thousands): 2024 2023 2022 Current: Federal $ 23,362 $ 29,835 $ 20,910 Foreign 76 116 50 State and local 8,164 10,298 7,299 Total 31,602 40,249 28,259 Deferred: Federal (10,920) 3,978 5,667 State and local (3,913) 1,108 2,195 Total (14,833) 5,086 7,862 Total income tax expense 16,769 45,335 36,121 The provision for income taxes attributable to income operations differed from the amount obtained by applying the federal statutory income tax rate to income before income taxes, as follows (in thousands, except percentages): 2024 2023 2022 Tax at U.S. federal statutory rates $ 12,139 $ 34,924 $ 29,714 State taxes (net of federal benefit) 3,182 10,576 9,019 Reserves for uncertain tax positions 209 (241) 337 Share-based compensation (3,907) (5,820) (6,832) Meals and entertainment 1,193 1,168 337 Non-deductible officers' compensation 3,762 5,485 2,507 Other, net 191 (757) 1,039 Provision for income taxes $ 16,769 $ 45,335 $ 36,121 Effective income tax rate 29.0 % 27.3 % 25.5 % The tax effects of temporary differences that gave rise to significant portions of the deferred tax assets and deferred tax liabilities at December 31, 2024 and 2023, were as follows (in thousands): 2024 2023 Deferred tax assets: Net operating loss carryforwards $ 2,912 $ 1,515 Allowance for doubtful accounts 7,596 4,876 Employee benefits and compensation 45,122 38,137 Acquisition-related costs 9,110 — Deferred revenue 4,446 — Property and equipment 141 — Lease liabilities 116,080 7,398 Other deferred tax assets 1,103 1,888 Total gross deferred tax assets 186,510 53,814 Less: valuation allowance (2,941) (2,721) Total deferred tax assets, net 183,569 51,093 Deferred tax liabilities: Goodwill and other intangibles 85,771 77,005 Right of Use assets 105,478 — Property and equipment — 836 Other deferred tax liabilities 3,200 2,539 Total gross deferred tax liabilities 194,449 80,380 Deferred income taxes, net $ (10,880) $ (29,287) We have established valuation allowances for deferred tax assets related to certain employee benefits and compensation and state net operating loss (“NOL”) carryforwards at December 31, 2024 and December 31, 2023. The net increase in the valuation allowance of $0.2 million for the year ended December 31, 2024, related to changes in the valuation allowance for NOLs and certain employee benefits and compensation. In assessing the realization of deferred tax assets, management considers all available positive and negative evidence, including projected future taxable income, scheduled reversal of deferred tax liabilities, historical financial operations and tax planning strategies. Based upon review of these items, management believes it is more-likely-than-not that the Company will realize the benefits of these deferred tax assets, net of the existing valuation allowances. We file income tax returns in the United States, Canada, and most state jurisdictions. Beginning in 2024, we will file tax returns in the Philippines. In general, the examination of our material tax returns is complete for years ending prior to January 1, 2021. In the fourth quarter of 2024, the Internal Revenue Service selected our 2022 federal tax return for examination. As we are in the early stages of the examination, we have received no indications of material adjustments that will be assessed as a result of the examination. With limited exceptions, our state and local income tax returns for years ending prior to January 1, 2020, and non-U.S. income tax returns for years ending prior to January 1, 2021, are no longer subject to tax authority examinations. The availability of NOLs and state tax credits are reported as a component of deferred tax assets, net of applicable valuation allowances, in the accompanying Consolidated Balance Sheets. At December 31, 2024, we had state net operating loss carryforwards of $84.6 million and a state tax credit carryforward of $0.1 million. The state net operating loss carryforwards expire on various dates between 2026 and 2045 and the state tax credit carryforward expires in 2028. A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows (in thousands): 2024 2023 2022 Balance at January 1 $ 1,847 $ 2,111 $ 1,594 Additions for tax positions of the current year 197 178 175 Additions for positions of prior years 168 103 486 Lapse of statutes of limitation (174) (545) (144) Balance at December 31 $ 2,038 $ 1,847 $ 2,111 Included in the balance of unrecognized tax benefits at December 31, 2024 are $1.3 million of unrecognized tax benefits that, if recognized, would affect the effective tax rate. We believe it is reasonably possible that certain of these unrecognized tax benefits could change in the next twelve months. We expect reductions in the liability for unrecognized tax benefits of approximately $0.2 million within the next twelve months due to expiration of statutes of limitation. Given the number of years that are currently subject to examination, we are unable to estimate the range of potential adjustments to the remaining balance of unrecognized tax benefits at this time. We recognize interest expense and penalties related to unrecognized tax benefits as a component of income tax expense. During 2024, we recorded an immaterial increase in accrued interest, and, as of December 31, 2024, we had recognized a liability for interest expense and penalties of $0.3 million and $0.2 million, respectively, relating to unrecognized tax benefits. During 2023, we recorded an immaterial increase in accrued interest, and, as of December 31, 2023, we had recognized a liability for interest expense and penalties of $0.3 million and $0.2 million, respectively, relating to unrecognized tax benefits.

DEBT AND FINANCING ARRANGEMENTS

DEBT AND FINANCING ARRANGEMENTS	12 Months Ended
	Dec. 31, 2024
Debt Disclosure [Abstract]
DEBT AND FINANCING ARRANGEMENTS	DEBT AND FINANCING ARRANGEMENTS 2024 Credit Facilities On November 1, 2024, the Company and CBIZ Operations, Inc., a wholly owned subsidiary of the Company, as the borrower (“CBIZ Operations”), Bank of America, N.A., as administrative agent, and the other financial institutions party thereto entered into an amended and restated credit agreement (the “2024 Credit Facilities”) providing for $2.0 billion in senior secured credit facilities, consisting of a $1.4 billion term loan (the “Term Loan”) and $600.0 million revolving credit facility (the “Revolving Credit Facility”). The 2024 Credit Facilities amend and restate the 2022 credit facility entered into on May 4, 2022 (the "2022 Credit Facility"). The proceeds of the Term Loan were used to pay the cash consideration and make certain other payments in connection with the closing of the Transaction and to repay outstanding amounts under the 2022 Credit Facility. Th e 2024 Credit Facilities mature on November 1, 2029. The Term Loan provides for scheduled annual principal amortization payments of 5% in the first two years following closing, 7.5% annually in the third and fourth year following closing and 10% in the fifth year following closing, with the balance due at maturity. The commitments under the 2024 Credit Facilities may be increased in the form of incremental term facilities and/or increased commitments under the Revolving Credit Facility in an aggregate principal amount of up to the sum of (a) the greater of (i) $465.0 million and (ii) 100% of EBITDA, plus (b) an unlimited amount, so long as Total Net Leverage Ratio (“TNLR”) is no more than the lesser of 3.50 to 1.00 and TNLR at the closing after giving pro forma effect to the Transaction. The Company may elect an interest rate for the Term Loan and the Revolving Credit Facility based on the Base Rate or Term SOFR, plus an applicable spread. The Base Rate option is the highest of: (i) the Bank of America prime rate; (ii) the federal funds rate plus 0.50% ; or (iii) Term SOFR plus 1.0% . Term SOFR is the forward-looking term rate based on the secured overnight financing rate that is published by CME Group Benchmark Administration Limited (or a successor administrator of such rate) plus a 0.10% SOFR Adjustment. The applicable spreads under the 2024 Credit Facilities will be 0.375% to 1.50% and 1.375% to 2.50% above the Base Rate and Term SOFR, respectively. The 2024 Credit Facilities contains certain restrictive covenants customary for facilities of this type, including restrictions on indebtedness, liens or other encumbrances, making certain payments, investments, or to sell or otherwise dispose of a substantial portion of assets, or to merge or consolidate with an unaffiliated entity. The 2024 Credit Facilities also limits our ability to make dividend payments. Historically, we have not paid cash dividends on our common stock. Our Board of Directors has discretion over the payment and level of dividends on common stock, subject to the limitations of the 2024 Credit Facilities and applicable law. The 2024 Credit Facilities contain a provision that, in the event of a defined change in control, the 2024 Credit Facilities may be terminated. In addition, the 2024 Credit Facilities include a financial covenant requiring that TNLR not exceed 5.00 to 1.00 initially, stepping down in increments to 3.75 to 1.00 during and after the seventh fiscal quarter after the closing (with a limited ability to temporarily increase in connection with material acquisitions commencing in the sixth fiscal quarter after the closing). The 2024 Credit Facilities also require a Minimum Consolidated Interest Coverage Ratio of 3.00 to 1.00 and affirmative and negative covenants that are in each case generally similar to those contained in the 2022 Credit Facility, but with increases to certain baskets and caps and certain other exceptions. As of December 31, 2024, we are in compliance with all covenants. In connection with our 2024 Credit Facilities, we incurred $20.7 million of financing costs during the year ended December 31, 2024. The financing costs are deferred and reported as a reduction of debt on the accompanying Consolidated Balance Sheets, are included as a component of cash flow from financing activities on the accompanying Consolidated Statements of Cash Flows, and are being amortized as interest expense over the term of the 2024 Credit Facilities. As of December 31, 2024, the borrowings outstanding under the 2024 Credit Facilities was $1.42 billion, consisting of $1.4 billion of the Term Loan and $20.9 million of borrowings under the Revolving Credit Facility. As of December 31, 2023 the outstanding debt balance was $312.4 million under the 2022 Credit Facility. The blended interest rates under the 2024 Credit Facilities and 2022 Credit Facility, including the impact of interest rate swaps associated with those credit facilities, were as follows: 2024 2023 Weighted average blended interest rate 6.00% 5.23% Range of blended interest rates 1.93% - 6.84% 1.93% - 8.00% We had approximately $556.0 million of available funds under the 2024 Credit Facilities at December 31, 2024, based on the terms of the commitment. Available funds under the 2024 Credit Facilities are based on a multiple of earnings before interest, taxes, depreciation and amortization as defined in the 2024 Credit Facilities, and are reduced by letters of credit, other indebtedness and outstanding borrowings under the 2024 Credit Facilities. Under the 2024 Credit Facilities, loans are charged an interest rate consisting of a base rate or term SOFR rate plus an applicable margin, letters of credit are charged based on the same applicable margin, and a commitment fee is charged on the unused portion of the 2024 Credit Facilities. Other line of credit We have an unsecured $20.0 million line of credit by and among CBIZ Benefits and Insurance, Inc., our wholly owned subsidiary, and the Huntington Bank. We utilize this line of credit to support our short-term funding requirements of payroll client fund obligations due to the investment of client funds, rather than liquidating client funds that have already been invested in available-for-sale securities. Refer to Note 7, Financial Instruments, for further discussion regarding these investments. The line of credit did not have a balance outstanding at December 31, 2024 and 2023. On August 1, 2024, we renewed the line of credit and it will now terminate on July 31, 2025. Borrowings under the line of credit bear interest at the prime rate. Interest expense Interest expense, including amortization of deferred financing costs, commitment fees, line of credit fees, and other applicable bank charges, was as follows (in thousands): 2024 2023 2022 Credit facilities $ 34,376 $ 20,093 $ 8,033 Other line of credit — 1 6 Other 3 37 — $ 34,379 $ 20,131 $ 8,039

ACCUMULATED OTHER COMPREHENSIVE

ACCUMULATED OTHER COMPREHENSIVE INCOME	12 Months Ended
	Dec. 31, 2024
Equity [Abstract]
ACCUMULATED OTHER COMPREHENSIVE INCOME	ACCUMULATED OTHER COMPREHENSIVE INCOME The components of accumulated other comprehensive income at December 31, 2024 and 2023 were as follows (in thousands): 2024 2023 Net unrealized loss of available-for-sale securities, net of income tax expense of $14 and income tax benefit of $168, respectively $ (48) $ (505) Net unrealized gain on interest rate swap, net of income tax expense of $685 and $972, respectively 2,075 3,064 Foreign currency translation (808) (781) Accumulated other comprehensive income $ 1,219 $ 1,778

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES	12 Months Ended
	Dec. 31, 2024
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES Acquisitions - The purchase price that we normally pay for businesses and client lists consists of two components: an up-front non-contingent portion, and a portion which is contingent upon the acquired businesses or client lists’ future performance. The fair value of the contingent purchase price consideration is recorded at the date of acquisition and re-measured each reporting period until the liability is settled. Shares of our common stock that are issued in connection with acquisitions may be contractually restricted from sale for periods up to one year. Acquisitions are further disclosed in Note 2, Business Combinations. Indemnifications - We have various agreements in which we may be obligated to indemnify the other party with respect to certain matters. Generally, these indemnification clauses are included in contracts arising in the normal course of business under which the Company customarily agrees to hold the other party harmless against losses arising from a breach of representations, warranties, covenants or agreements, related to matters such as title to assets sold and certain tax matters. Payment by us under such indemnification clauses are generally conditioned upon the other party making a claim. Such claims are typically subject to challenge by us and to dispute resolution procedures specified in the particular contract. Further, our obligations under these agreements may be limited in terms of time and/or amount and, in some instances, we may have recourse against third parties for certain payments made by us. It is not possible to predict the maximum potential amount of future payments under these indemnification agreements due to the conditional nature of our obligations and the unique facts of each particular agreement. Historically, we have not made any payments under these agreements that have been material individually or in the aggregate. As of December 31, 2024, we were not aware of any obligations arising under indemnification agreements that would require material payments, and therefore have not recorded a liability. Employment Agreements - We maintain severance and employment agreements with certain of our executive officers, whereby such officers may be entitled to payment in the event of termination of their employment. We also have arrangements with certain non-executive employees which may include severance and other employment provisions. We accrue for amounts payable under these contracts and arrangements as triggering events occur and obligations become known. During the years ended December 31, 2024, 2023, and 2022, payments under such contracts and arrangements were not material. Letters of Credit and Guarantees - We provide letters of credit to landlords (lessors) of our leased premises in lieu of cash security deposits, which totaled $3.2 million and $3.5 million at December 31, 2024 and 2023, respectively. In addition, we provide license bonds to various state agencies to meet certain licensing requirements. The amount of license bonds outstanding was $2.2 million and $2.3 million at December 31, 2024 and 2023, respectively. Legal Proceedings - On December 19, 2016, CBIZ Operations, Inc. ("CBIZ Operations") was named as a defendant in a lawsuit filed by Zotec Partners, LLC (“Zotec”) in the Marion County Indiana Superior Court. After various amendments, the lawsuit asserted claims under Indiana law for securities, statutory and common law fraud or deception, unjust enrichment, breach of contract, and vicarious liability against CBIZ Operations and a former employee of CBIZ MMP in connection with the sale of the CBIZ MMP medical billing practice to Zotec. The plaintiff claimed that CBIZ Operations had a duty to disclose the fact, unknown to employees of CBIZ Operations at the time of the transaction, that the former employee had a financial arrangement with a Zotec vendor at the time CBIZ Operations sold CBIZ MMP to Zotec. The plaintiff sought damages of up to $177.0 million out of the $200.0 million transaction price. Trial was held in October 2021. The jury found in favor of CBIZ on all fraud, contract and other claims before it. On November 14, 2022, the trial court ruled in favor of CBIZ and against Zotec’s claim for statutory securities fraud. The court also ruled in favor of CBIZ on its counterclaim for indemnification under contract. The trial court conducted a hearing on December 12, 2023, to consider evidence regarding the amount of damages owed by Zotec to CBIZ on the counterclaim. On March 12, 2024, the court awarded CBIZ $3.1 million on its counterclaim. On April 10, 2024, Zotec filed a notice of appeal. On November 10, 2023, CBIZ was named as a defendant in a putative class action lawsuit in the United States District Court for the District of Massachusetts by an individual claiming to be an employee of a CBIZ client whose personally identifiable information (“PII”) was compromised and stolen during a cyberattack CBIZ experienced on or about May 31, 2023. As a result of this incident, hackers were able to access and download certain files from CBIZ’s MOVEit Transfer server. The lawsuit alleges that CBIZ and Progress Software Corporation, the owner of MOVEit Transfer, failed to adequately secure and safeguard the individual’s, and similarly situated employees of CBIZ’s clients, PII from unauthorized access. The lawsuit seeks various remedies, including actual, compensatory, and punitive damages, along with injunctive relief, costs, and attorneys’ fees. On December 8, 2023, CBIZ was named as a defendant in a second putative class action lawsuit in the United States District Court for the District of Massachusetts by an individual making similar claims and seeking similar remedies as in the first lawsuit. Both cases were transferred into a multidistrict litigation, styled as In Re: MOVEit Customer Data Security Breach Litigation , pending in the United States District Court for the District of Massachusetts (the “MDL”). To date, the MDL has over 180 cases against over 100 different defendants, all with claims arising out of the cyberbreach by hackers of Progress Software Corporation’s MOVEit Transfer software. Due to the early stage of litigation, the Company is not able to determine or predict the ultimate outcome of these lawsuits nor reasonably provide an estimate or range of the possible outcome or losses, if any. In addition to the item disclosed above, the Company is, from time to time, subject to claims and lawsuits arising in the ordinary course of business. We cannot predict the outcome of all such matters or estimate the possible loss, if any. Although the proceedings are subject to uncertainties in the litigation process and the ultimate disposition of these proceedings is not presently determinable, we intend to vigorously defend these matters.

EMPLOYEE BENEFITS

EMPLOYEE BENEFITS	12 Months Ended
	Dec. 31, 2024
Retirement Benefits [Abstract]
EMPLOYEE BENEFITS	EMPLOYEE BENEFITS Employee Savings Plan - We sponsor a qualified 401(k) defined contribution plan that covers substantially all of our employees. Participating employees may elect to contribute, on a tax-deferred basis, up to 80% of their pre-tax annual compensation (subject to a maximum permissible contribution under Section 401(k) of the Internal Revenue Code). Matching contributions by us are 50% of the first 6% of base compensation that the participant contributes, and additional amounts may be contributed at the discretion of the Board of Directors. Participants may elect to invest their contributions in various funds including: equity, fixed income, stable value, and balanced-lifecycle funds. Employer contributions (net of forfeitures) made to the plan during the years ended December 31, 2024, 2023, and 2022 were approximately $22.9 million, $18.5 million and $16.1 million, respectively. Non-qualified Deferred Compensation Plan - We sponsor a non-qualified deferred compensation plan, under which certain members of management and other highly compensated employees may elect to defer receipt of a portion of their annual compensation, subject to maximum and minimum percentage limitations. The amount of compensation deferred under the plan is credited to each participant’s deferral account and a non-qualified deferred compensation plan obligation is established by us. An amount equal to each participant’s compensation deferral is transferred into a rabbi trust and invested in various debt and equity securities as directed by the participants. The assets of the rabbi trust are held by us and recorded as “Assets of deferred compensation plan” in the accompanying Consolidated Balance Sheets. Assets of the non-qualified deferred compensation plan consist primarily of investments in mutual funds, money market funds and equity securities. The values of these investments are based on published market prices at the end of the period. Adjustments to the fair value of these investments are recorded in “Other (expense) income, net,” offset by the same adjustments to compensation expense (recorded as “Operating expenses” or “G&A expenses” in the accompanying Consolidated Statements of Comprehensive Income). We recorded income of $21.1 million related to those investments for the year ended December 31, 2024. For the year ended December 31, 2023, we recorded income of $19.5 million and a loss of $19.6 million for the year ended December 31, 2022, related to these investments. These investments are specifically designated as available to us solely for the purpose of paying benefits under the non-qualified deferred compensation plan. However, the investments in the rabbi trusts would be available to all unsecured general creditors in the event that we become insolvent. Deferred compensation plan obligations represent amounts due to plan participants and consist of accumulated participant deferrals and changes in fair value of investments thereon since the inception of the plan, net of withdrawals. This liability is an unsecured general obligation of ours and is recorded as “Deferred compensation plan obligations” in the accompanying Consolidated Balance Sheets. The assets and liabilities related to the non-qualified deferred compensation plan at December 31, 2024 and 2023 were $167.2 million and $143.5 million, respectively.

COMMON STOCK

COMMON STOCK	12 Months Ended
	Dec. 31, 2024
Equity [Abstract]
COMMON STOCK	COMMON STOCK Share Repurchase Program - Our Board of Directors approved various share repurchase programs that were effective during the years ended December 31, 2024 and 2023. Under these programs, shares may be purchased in the open market or in privately negotiated transactions according to SEC rules. The Share Repurchase Program does not obligate us to acquire any specific number of shares and may be suspended at any time. Repurchased shares are held in treasury and may be reserved for future use in connection with acquisitions, employee share plans and other general purposes. Under the 2024 Credit Facilities, described in Note 10, Debt and Financing Arrangements, share repurchases are unlimited when total leverage is less than 3.0x on a proforma basis including such share repurchases. When leverage is greater than 3.0x but less than the Adjusted Total Leverage Ratio (defined as the maximum leverage ration less 0.25x) on a proforma basis including share repurchases, the annual share repurchase is limited to the greater of $50.0 million and 10 percent of Pro Forma EBITDA. Under the Share Repurchase Program, we repurchased no shares on the open market during the year ended December 31, 2024. We repurchased 1.3 million shares on the open market at a cost (including fees and commissions) of $65.1 million during the year ended December 31, 2023. Shares repurchased to settle statutory employee withholding related to vesting of stock awards were 0.2 million shares at a cost of $11.5 million during the year ended December 31, 2024 and 0.2 million shares at a cost of $8.4 million during the year ended December 31, 2023. Common Stock Issued for Marcum Acquisition -

EMPLOYEE STOCK PLANS

EMPLOYEE STOCK PLANS	12 Months Ended
	Dec. 31, 2024
Share-Based Payment Arrangement [Abstract]
EMPLOYEE STOCK PLANS	EMPLOYEE STOCK PLANS Employee Stock Purchase Plan - The 2007 Employee Stock Purchase Plan (“ESPP”), which has a termination date of June 30, 2026, allows qualified employees to purchase shares of common stock through payroll deductions up to a limit of $25,000 of stock per calendar year. The price an employee pays for shares is 85% of the fair market value of our common stock on the last day of the purchase period. Purchase periods begin on the sixteenth day of the month and end on the fifteenth day of the subsequent month. Other than a one-year holding period from the date of purchase, there are no vesting or other restrictions on the stock purchased by employees under the ESPP. The total number of shares of common stock that can be purchased under the ESPP shall not exceed 2.0 million shares. Stock Awards - We granted various stock-based awards through the year ended December 31, 2024 under the CBIZ, Inc. 2019 Stock Omnibus Incentive Plan (“2019 Plan”). On May 10, 2023, the stockholders of the Company approved an amendment to the 2019 Plan. The amendment added 1.5 million shares to the total number of shares that may be issued under the 2019 Plan. The 2019 Plan, which expires in 2029, permits the grant of various forms of stock-based awards. The terms and vesting schedules for the share-based awards vary by type and date of grant. Under the 2019 Plan, a maximum of 4.6 million stock options, restricted stock or other stock based compensation awards may be granted. Shares subject to award under the 2019 Plan may be either authorized but unissued shares of our common stock or treasury shares. At December 31, 2024, approximately 2.0 million shares were available for future grant under the 2019 Plan. During the years ended December 31, 2024, 2023 and 2022, we recognized compensation expense (before income tax expense) for these awards as follows (in thousands): 2024 2023 2022 Stock options $ — $ 768 $ 248 Restricted stock units and awards 7,771 5,258 5,204 Performance share units 6,065 6,260 9,237 Total share-based compensation expense $ 13,836 $ 12,286 $ 14,689 Stock Options - Certain employees and non-employee directors were granted stock options. During the year ended December 31, 2024, there were no stock options granted or exercised. As of December 31, 2024, we have 150 thousand stock options outstanding with a weighted average exercise price per share of $35.22. Restricted Stock Units and Awards - Under the 2019 Plan, certain employees, non-employee directors, and third-party service providers were granted restricted stock units and awards. Restricted stock units and awards vest at no cost to the recipients. Restricted stock units and awards are subject to forfeiture if employment terminates prior to the release of restrictions, generally one . Restricted stock units and awards activity during the year ended December 31, 2024 was as follows (in thousands, except per share data): Number of Weighted Average Grant-Date Fair Value (1) Non-vested at December 31, 2023 223 $ 41.19 Granted (2) 810 $ 69.46 Vested (131) $ 38.76 Forfeited (3) $ 38.52 Non-vested at December 31, 2024 899 $ 67.01 (1) Represents weighted average market value of the shares as the awards are granted at no cost to the recipients. (2) As a result of the Transaction approximately 713 thousand shares were granted to certain employees and third-party providers. • At December 31, 2024, we had unrecognized compensation cost for restricted stock units and awards of $53.6 million to be recognized over a weighted average period of approximately 3.20 years. • The total fair value of shares vested during the years ended December 31, 2024, 2023, and 2022 was approximately $5.1 million, $5.1 million and $5.6 million, respectively. • The market value of shares awarded during the years ended December 31, 2024, 2023, and 2022 was $56.2 million, $5.3 million and $5.0 million, respectively. This market value was recorded as unearned compensation and is recognized as expense ratably over the periods which the restrictions lapse. • Awards outstanding at December 31, 2024 will be released from restrictions at dates ranging from February, 2025 through November, 2028. Performance Share Units (“PSUs”) - PSUs are earned based on our financial performance over a contractual term of three years and the associated expense is recognized over that period based on the fair value of the award. A three-year cliff vesting schedule of the PSUs is dependent upon the Company’s performance relative to pre-established goals based on earnings per share target (weighted 70%) and total growth in revenue (weighted 30%). The fair value of PSUs is calculated using the market value of our common stock on the date of grant. For performance achieved above specified levels, the recipient may earn additional shares of stock, not to exceed 200% of the number of PSUs initially granted. The following table presents our PSUs award activity during the twelve months ended December 31, 2024 (in thousands, except per share data): Performance Share Units Weighted Average Grant-Date Fair Value Per Unit (1) Outstanding at December 31, 2023 464 $ 33.84 Granted 70 $ 66.07 Vested (273) $ 27.51 Adjustments for performance results (2) 31 $ 38.12 Forfeited (7) $ 39.09 Outstanding at December 31, 2024 285 $ 48.18 ( 1) Represents weighted average market value of the shares; awards are granted at no cost to the recipients.

EARNINGS PER SHARE

EARNINGS PER SHARE	12 Months Ended
	Dec. 31, 2024
Earnings Per Share [Abstract]
EARNINGS PER SHARE	EARNINGS PER SHARE The following table sets forth the reconciliation of the numerator and the denominator of basic earnings per share and diluted earnings per share for the years ended December 31, 2024, 2023, and 2022 (in thousands, except per share data): Year Ended December 31, 2024 2023 2022 Numerator: Net income $ 41,038 $ 120,968 $ 105,354 Denominator: Basic Weighted average common shares outstanding 52,375 49,989 51,502 Diluted Stock options 78 172 487 Restricted stock awards (1) 78 98 141 Contingent shares (2) 3 21 14 Performance share units (3) 127 277 244 Diluted weighted average common shares outstanding 52,661 50,557 52,388 Earnings Per Share: Basic earnings per share $ 0.78 $ 2.42 $ 2.05 Diluted earnings per share $ 0.78 $ 2.39 $ 2.01 (1) For the years ended December 31, 2024, 2023 and 2022, a total of 173 thousand, 58 thousand and 68 thousand stock based awards, respectively, were excluded from the calculation of diluted earnings per share as their exercise prices would render them anti-dilutive. (2) Contingent shares represent additional shares to be issued for purchase price earned by former owners of businesses acquired by us once future conditions have been met. For further details, refer to Note 2, Business Combinations . (3) The denominator used in calculating diluted earnings per share did not include 0.2 million, 0.2 million and 0.2 million performance share units for the twelve months ended December 31, 2024, 2023 and 2022, respectively. The performance conditions associated with these performance share units were not met and consequently none of these performance share units were considered as issuable for the years ended December 31, 2024, 2023 and 2022.

LEASES

LEASES	12 Months Ended
	Dec. 31, 2024
Leases [Abstract]
LEASES	LEASES We determine if a contract is a lease at inception. We have leases for office space and facilities, automobiles and certain information technology equipment. All of our leases are classified as operating leases and the majority of which are for office space and facilities. Supplemental balance sheet information related to the Company’s operating leases as of December 31, 2024 and 2023 was as follows (in thousands): December 31, 2024 December 31, 2023 Weighted-average remaining lease term 7.5 years 7.3 years Weighted-average discount rate 5.91 % 5.51 % The components of lease cost and other lease information as of and during the year ended December 31, 2024 and 2023 are as follows (in thousands): December 31, 2024 December 31, 2023 Operating lease cost $ 51,783 $ 45,088 Cash paid for amounts included in measurement of lease liabilities Operating cash flows for operating leases $ 52,483 $ 46,936 Our leases have remaining lease terms ranging from less than 1 year to approximately 19 years. These leases generally contain renewal options for periods ranging from two reasonably certain to exercise these renewal options, the options are not included in the lease term, and associated potential option payments are excluded from lease payments. Maturities of operating lease liabilities at December 31, 2024 and minimum cash commitments under operating leases at December 31, 2023 were as follows (in thousands): December 31, 2024 2025 $ 84,270 2026 83,995 2027 80,062 2028 63,907 2029 55,120 Thereafter 178,389 Total undiscounted lease payments 545,743 Less: imputed interest (112,608) Total lease liabilities $ 433,135 December 31, 2023 2024 $ 47,446 2025 46,623 2026 43,131 2027 40,678 2028 29,261 Thereafter 90,535 Total undiscounted lease payments 297,674 Less: imputed interest (57,486) Total lease liabilities $ 240,188

RELATED PARTIES

RELATED PARTIES	12 Months Ended
	Dec. 31, 2024
Related Party Transactions [Abstract]
RELATED PARTIES	RELATED PARTIES The following is a summary of certain agreements and transactions between or among us and certain related parties. Management reviews these transactions as they occur and monitors them for compliance with our Code of Conduct, internal procedures and applicable legal requirements. The Audit Committee reviews and ratifies such transactions annually, or as they are more frequently brought to the attention of the Audit Committee by our Director of Internal Audit, General Counsel or other members of Management. A number of the businesses acquired by us are located in properties owned indirectly by and leased from persons employed by us, none of whom are members of our senior management. In the aggregate, we paid approximately $1.6 million, $1.2 million and $1.9 million during the years ended December 31, 2024, 2023 and 2022, respectively, under such leases.

SEGMENT DISCLOSURES

SEGMENT DISCLOSURES	12 Months Ended
	Dec. 31, 2024
Segment Reporting [Abstract]
SEGMENT DISCLOSURES	SEGMENT DISCLOSURES Our business units have been aggregated into three practice groups: (i) Financial Services, (ii) Benefits and Insurance Services and (iii) National Practices, based on the following factors: similarity of the products and services provided to clients, similarity of the regulatory environment in which they operate; and similarity of economic conditions affecting long-term performance. The business units are managed along these segment lines. A general description of services provided by practice groups is provided in the table below. Financial Services Benefits and Insurance Services National Practices Accounting and Tax Employee Benefits Consulting Information Technology Managed Networking and Hardware Services Financial Advisory Payroll / Human Capital Management National Technology Property and Casualty Insurance Government Heath Care Consulting Retirement and Investment Services Corporate and Other - Included in Corporate and Other are operating expenses that are not directly allocated to the individual business units. These expenses primarily consist of certain healthcare costs, gains or losses attributable to assets held in our non-qualified deferred compensation plan, stock-based compensation, consolidation and integration charges, certain professional fees, certain advertising costs and other various expenses. The discrete financial information of those practice groups are available and regularly reviewed by the Chief Operating Decision Maker ("CODM"). The CODM, who is our CEO, allocates resources to and assesses the performance of each practice group using information about their respective revenue and income (loss) before income tax expense (benefit), excluding those costs listed above, which are reported in the “Corporate and Other”. Upon consolidation, intercompany accounts and transactions are eliminated, thus inter-segment revenue is not included in the measure of profit or loss for the practice groups. The CODM does not evaluate practice groups using discrete asset information, and we do not identify or allocate assets by practice groups. We operate in the United States and Canada and revenue generated from such operations during the years ended December 31, 2024, 2023 and 2022 was as follows (in thousands): Year Ended December 31, 2024 2023 2022 United States $ 1,811,113 $ 1,589,478 $ 1,410,255 Canada 2,359 1,716 1,724 Total revenue $ 1,813,472 $ 1,591,194 $ 1,411,979 There is no one customer that represents a significant portion of our revenue. The practice groups respective revenue and pre-tax income, significant segment expenses, and a reconciliation of segment profit or loss measure to the consolidated income before income tax expense for the years ended December 31, 2024, 2023 and 2022 are presented below (in thousands). For the Year Ended December 31, 2024 Financial Benefits and National Total Revenue from external customers $ 1,362,539 $ 401,048 $ 49,885 $ 1,813,472 Significant expenses: Personnel costs 972,730 257,166 42,913 1,272,809 Facility costs 55,178 12,481 177 67,836 Other costs, gains, and losses, net (1) 185,091 58,476 (3,394) 240,173 Total segment expense 1,212,999 328,123 39,696 1,580,818 Segment income before income tax expenses 149,540 72,925 10,189 232,654 Corporate & other: Unallocated corporate operating expenses 44,485 General & administrative expenses 108,753 Interest expense 34,374 Other income, net (12,765) Consolidated income before income tax expenses $ 57,807 For the Year Ended December 31, 2023 Financial Benefits and National Total Revenue from external customers $ 1,160,686 $ 382,605 $ 47,903 $ 1,591,194 Significant expenses: Personnel costs 793,791 242,340 40,949 1,077,080 Facility costs 44,444 12,196 250 56,890 Other costs, gains, and losses, net (1) 134,623 53,916 1,860 190,399 Total segment expense 972,858 308,452 43,059 1,324,369 Segment income before income tax expenses 187,828 74,153 4,844 266,825 Corporate & other: Unallocated corporate operating expenses 39,344 General & administrative expenses 57,965 Interest expense 20,129 Other income, net (16,916) Consolidated income before income tax expenses $ 166,303 For the Year Ended December 31, 2022 Financial Benefits and National Total Revenue from external customers $ 1,010,068 $ 358,007 $ 43,904 $ 1,411,979 Significant expenses: Personnel costs 688,555 225,871 36,832 951,258 Facility costs 42,617 12,831 250 55,698 Other costs, gains, and losses, net (1) 118,184 49,299 2,109 169,592 Total segment expense 849,356 288,001 39,191 1,176,548 Segment income before income tax expenses 160,712 70,006 4,713 235,431 Corporate & other: Unallocated corporate operating expenses 8,986 General & administrative expenses 55,023 Interest expense 8,033 Other expense, net 21,914 Consolidated income before income tax expenses $ 141,475 (1)

SUBSEQUENT EVENTS

SUBSEQUENT EVENTS	12 Months Ended
	Dec. 31, 2024
Subsequent Events [Abstract]
SUBSEQUENT EVENTS	SUBSEQUENT EVENTS Share Repurchase Program On February 11, 2025, our Board of Directors authorized the continuation of the Share Repurchase Program, which has been renewed annually for the past twenty years. It is effective beginning March 31, 2025, to which the amount of shares to be purchased will be reset to 5.0 million, and expires one year from the respective effective date. The Share Repurchase Program allows the Company to purchase shares of its common stock (i) in the open market, (ii) in privately negotiated transactions, or (iii) under Rule 10b5-1 trading plans. Privately negotiated transactions may include purchases from employees, officers and directors, in accordance with SEC rules. Privately negotiated transactions may also include purchases from former partners of Marcum LLP pursuant to the Company’s right, but not obligation, to repurchase any shares issued to such former partners as consideration for the Company’s recent acquisition, in the event that the former partner intends to sell the shares in a market transaction in the four years following closing. Rule 10b5-1 trading plans allow for repurchases during periods when the Company would not normally be active in the trading market due to regulatory restrictions. The Share Repurchase Program does not obligate the Company to acquire any specific number of shares and may be suspended at any time. Any repurchases would only be made to the extent permitted under the Company’s current or any future credit facility.

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Pay vs Performance Disclosure
Net income	$ 41,038	$ 120,968	$ 105,354

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
	Dec. 31, 2024
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Insider Trading Policies and Pr

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

Cybersecurity Risk Management a

Cybersecurity Risk Management and Strategy Disclosure	12 Months Ended
	Dec. 31, 2024
Cybersecurity Risk Management, Strategy, and Governance [Line Items]
Cybersecurity Risk Management Processes for Assessing, Identifying, and Managing Threats [Text Block]	CBIZ maintains a cyber risk management program designed to identify, assess, manage, mitigate, and respond to cybersecurity threats. This program, which is integrated into the Company’s enterprise risk management system, includes the development, implementation, and maintenance of security measures and controls, as well as policies and procedures governing the operation of these security measures and controls. The underlying controls of the cyber risk management program are based on recognized practices and standards for cybersecurity and information technology, including the National Institute of Standards and Technology (“NIST”) Cybersecurity Framework (“CSF”) and the International Organization Standardization (“ISO”) 27002 framework and code of practice for information security controls to establish, implement, and improve an Information Security Management System focused on cybersecurity. Cyber partners are a key part of CBIZ’s cybersecurity infrastructure. CBIZ partners with leading cybersecurity companies and organizations, leveraging third-party technology and expertise. CBIZ engages with these partners to monitor and maintain the performance and effectiveness of third-party products and services that are deployed in CBIZ’s environment, to scan for potential vulnerabilities and to conduct penetration testing. CBIZ’s Vice President, IT Security and Compliance reports to CBIZ’s Chief Information Officer and is the head of the Company’s cybersecurity team. The IT Security Director is responsible for assessing and managing CBIZ’s cyber risk management program, informs senior management regarding the prevention, detection, mitigation, and remediation of cybersecurity incidents and supervises such efforts. The cybersecurity team has decades of experience selecting, deploying and operating cybersecurity technologies, initiatives and processes. Additionally, members of the cyber security team have extensive information technology and program management expertise and have earned various cybersecurity certifications. Finally, the cybersecurity team relies on threat intelligence as well as other information obtained from governmental, public or private sources, including external consultants engaged by CBIZ.
Cybersecurity Risk Management Processes Integrated [Flag]	true
Cybersecurity Risk Management Processes Integrated [Text Block]	This program, which is integrated into the Company’s enterprise risk management system, includes the development, implementation, and maintenance of security measures and controls, as well as policies and procedures governing the operation of these security measures and controls.
Cybersecurity Risk Management Third Party Engaged [Flag]	true
Cybersecurity Risk Third Party Oversight and Identification Processes [Flag]	true
Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Flag]	false
Cybersecurity Risk Board of Directors Oversight [Text Block]	The Board of Directors oversees CBIZ’s cybersecurity risk exposures and the steps taken by management to monitor and mitigate cybersecurity risks. The cybersecurity team briefs the Board of Directors on the status of CBIZ’s cyber risk management program, typically on a semi-annual basis.
Cybersecurity Risk Board Committee or Subcommittee Responsible for Oversight [Text Block]	The Board of Directors oversees CBIZ’s cybersecurity risk exposures and the steps taken by management to monitor and mitigate cybersecurity risks.
Cybersecurity Risk Process for Informing Board Committee or Subcommittee Responsible for Oversight [Text Block]	The cybersecurity team briefs the Board of Directors on the status of CBIZ’s cyber risk management program, typically on a semi-annual basis.
Cybersecurity Risk Role of Management [Text Block]	CBIZ’s Vice President, IT Security and Compliance reports to CBIZ’s Chief Information Officer and is the head of the Company’s cybersecurity team. The IT Security Director is responsible for assessing and managing CBIZ’s cyber risk management program, informs senior management regarding the prevention, detection, mitigation, and remediation of cybersecurity incidents and supervises such efforts. The cybersecurity team has decades of experience selecting, deploying and operating cybersecurity technologies, initiatives and processes. Additionally, members of the cyber security team have extensive information technology and program management expertise and have earned various cybersecurity certifications. Finally, the cybersecurity team relies on threat intelligence as well as other information obtained from governmental, public or private sources, including external consultants engaged by CBIZ.
Cybersecurity Risk Management Positions or Committees Responsible [Flag]	true
Cybersecurity Risk Management Positions or Committees Responsible [Text Block]	CBIZ’s Vice President, IT Security and Compliance reports to CBIZ’s Chief Information Officer and is the head of the Company’s cybersecurity team. The IT Security Director is responsible for assessing and managing CBIZ’s cyber risk management program, informs senior management regarding the prevention, detection, mitigation, and remediation of cybersecurity incidents and supervises such efforts.
Cybersecurity Risk Management Expertise of Management Responsible [Text Block]	The cybersecurity team has decades of experience selecting, deploying and operating cybersecurity technologies, initiatives and processes. Additionally, members of the cyber security team have extensive information technology and program management expertise and have earned various cybersecurity certifications.
Cybersecurity Risk Process for Informing Management or Committees Responsible [Text Block]	The IT Security Director is responsible for assessing and managing CBIZ’s cyber risk management program, informs senior management regarding the prevention, detection, mitigation, and remediation of cybersecurity incidents and supervises such efforts.
Cybersecurity Risk Management Positions or Committees Responsible Report to Board [Flag]	true

BASIS OF PRESENTATION AND SIG_2

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Policies)	12 Months Ended
	Dec. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization	Organization - CBIZ, Inc. is a leading provider of financial, insurance and advisory services to businesses throughout the United States and parts of Canada. Acting through its subsidiaries, it has been serving small and medium-sized businesses, as well as individuals, governmental entities, and not-for-profit enterprises. CBIZ, Inc. manages and reports its operations along three practice groups: Financial Services, Benefits and Insurance Services and National Practices. A further description of products and services offered by each of the practice groups is provided in Note 19, Segment Disclosures, to the accompanying consolidated financial statements. In July 2024, CBIZ announced the acquisition of Marcum LLP, representing the largest transaction in the Company’s history. That acquisition closed on November 1, 2024, augmenting the Company’s services across the three practice groups. Refer to Note 2. Business Combination for further discussion of the Marcum Acquisition (the "Transaction").
Basis of Presentation	Basis of Presentation - The accompanying consolidated financial statements reflect the operations of CBIZ, Inc. and all of its wholly-owned subsidiaries (“CBIZ,” the “Company,” “we,” “us” or “our”), after elimination of all intercompany accounts and transactions. We have prepared the accompanying consolidated financial statements in accordance with United States Generally Accepted Accounting Principles ("GAAP") and pursuant to the rules and regulations of the United States Securities & Exchange Commission ("SEC"). We have determined that our relationship with certain CPA firms with whom we maintain ASAs qualify as variable interest entities ("VIEs"), and we are the primary beneficiary of such VIE. The accompanying consolidated financial statements do not reflect the results of operations or the financial position of the VIEs as the impact is not material to our consolidated financial condition, results of operations or cash flows.
Use of Estimates	Use of Estimates - The preparation of consolidated financial statements in conformity with GAAP and pursuant to the rules and regulations of the SEC requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Management’s estimates and assumptions are derived from and are continually evaluated based upon available information, judgment and experience. Actual results may differ materially from these estimates.
Revenue Recognition	Revenue Recognition -
Operating Expenses	Operating Expenses - Operating expenses represent costs of service and other costs incurred to operate our business units and are primarily comprised of personnel costs and occupancy related expenses. Personnel costs include (i) salaries and benefits; (ii) commissions paid to producers; (iii) incentive compensation; and (iv) share-based compensation. Incentive compensation costs and share-based compensation are estimated and accrued. The final determination of incentive compensation is made after year-end results are finalized. The largest components of occupancy costs are rent expense and utilities. Base rent expense is recognized over respective lease terms, while utilities and common area maintenance charges are recognized as incurred.
Share-Based Compensation	Share-Based Compensation - The measurement of all share-based compensation arrangements is based on their respective grant date fair value. The grant date fair value of restricted stock awards and restricted stock units is based on the closing price of the underlying stock on the date of issuance. The grant date fair value of the performance share units is based on the closing price of the underlying stock on the date of issuance and recorded based on achievement of target performance metrics. The expense related to restricted stock awards and restricted stock units is recognized over the requisite service period which is generally three
Operating Leases	Operating Leases - We determine if a contract is a lease at inception. We have leases for office space and facilities, automobiles, and certain information technology equipment. Certain of these leases include options to extend the lease and some include options to terminate the lease early. As an accounting policy election, we elected not to apply the recognition requirements to short term leases (a lease at commencement date that has a lease term of 12 months or less and does not contain a purchase option that we are reasonably certain to exercise). The ROU assets and lease liabilities are recognized as of the commencement date based on the present value of the lease payments over the lease term. The discount rate utilized for the measurement purpose is based on our secured fixed rate to borrow over a comparable term for the lease because the rate implicit in the lease is not determinable. The lease term may include the options to extend or terminate the lease when it is reasonably certain that we will exercise the applicable option. Related rent expense under such leases is recognized evenly throughout the term of the lease when the total lease commitment is a known amount, and recorded on an as incurred basis when future rent payment increases under the obligation are unknown due to rent escalations being tied to factors that are not currently measurable (such as increases in the consumer price index). Differences between rent expense recognized and the cash payments required under these leases are recorded as a component of “Lease liability” in the current and non-current liabilities sections of the accompanying Consolidated Balance Sheets. We may receive incentives to lease office facilities in certain areas. Such incentives are recorded as a change in lease payments and may require us to remeasure the lease liability to reflect the change in lease payments.
Cash and Cash Equivalents	Cash and Cash Equivalents - Cash and cash equivalents consist of cash on hand and investments with an original maturity of three months or less when purchased.
Restricted Cash	Restricted Cash - Restricted cash consists of funds held by us in relation to our capital and investment advisory services as those funds are restricted in accordance with applicable Financial Industry Regulatory Authority regulations. Restricted cash also consists of funds on deposit from clients in connection with the pass-through of insurance premiums to the carrier with the related liability for these funds recorded in “Accounts payable” in the accompanying Consolidated Balance Sheets.
Accounts Receivable and Allowance for Doubtful Accounts	Accounts Receivable and Allowance for Doubtful Accounts -
Funds Held for Clients and Client Fund Obligations	Funds Held for Clients and Client Fund Obligations -
Property and Equipment	Property and Equipment - Property and equipment are recorded at cost less accumulated depreciation and amortization. Depreciation and amortization are provided on a straight-line basis over the following estimated useful lives: Buildings 25 to 40 years Furniture and fixtures 5 to 10 years Capitalized software 3 to 5 years Equipment 3 to 7 years
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets - Goodwill represents the excess of the purchase price of the acquired businesses over the related fair value of the net assets acquired. At December 31, 2024, the carrying value of goodwill totaled $2.3 billion, compared to total assets of $4.5 billion and total stockholders’ equity of $1.8 billion. Intangible assets consist of identifiable intangibles other than goodwill. Identifiable intangible assets other than goodwill include client lists and non-compete agreements which require significant judgments in determining the fair value. We carry client lists and non-compete agreements at cost, less accumulated amortization, in the accompanying Consolidated Balance Sheets. Goodwill is reviewed for impairment annually during the fourth quarter or more frequently in the event of an impairment indicator. We are required to consider whether it is more likely than not (defined as a likelihood of more than 50%) that the fair value of each reporting unit has fallen below its carrying value, thus requiring us to perform an interim goodwill impairment test. Intangible assets with definite lives, such as client lists and non-compete agreements, are amortized using the straight-line method over their estimated useful lives (generally ranging from three The goodwill impairment test is performed at a reporting unit level. A reporting unit is an operating segment of a business or one level below an operating segment. At December 31, 2024, we had six reporting units carrying goodwill balances, of which one is a new reporting unit resulting from the Transaction. The new reporting unit was added to align the internal reporting structure with services provided by the three practice groups. As of December 31, 2024, the amount of goodwill assigned to this reporting unit is subject to change upon the finalization of the purchase price allocation. Refer to Note. 2 Business Combinations for detailed discussion of the Transaction. We may use either a qualitative or quantitative approach when testing a reporting unit’s goodwill for impairment. Under the qualitative assessment, we are not required to calculate the fair value of a reporting unit unless we determine that it is more likely than not that its fair value is less than its carrying amount. If under the quantitative assessment the fair value of a reporting unit is less than its carrying amount, then the amount of the impairment loss, if any, must be measured. Any such impairment charge would reduce earnings and could be material.
Income Taxes	Income Taxes - Income taxes are provided for the tax effects of transactions reported in the consolidated financial statements and consist of taxes currently payable and deferred taxes. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax basis, and operating losses and tax credit carryforwards. State income tax credits are accounted for using the flow-through method. A valuation allowance is provided when it is more-likely-than-not that all or some portion of a deferred tax asset will not be realized. We determine valuation allowances based on all available evidence. Such evidence includes historical results, the reversal of deferred tax liabilities, expectations of future consolidated and/or separate company profitability and the feasibility of tax-planning strategies. Determining valuation allowances includes significant judgment by management, and different judgments could yield different results. Accounting for uncertain tax positions requires a more-likely-than-not threshold for recognition in the consolidated financial statements. We recognize a tax benefit based on whether it is more-likely-than-not that a tax position will be sustained. We record a liability to the extent that a tax position taken or expected to be taken on a tax return exceeds the amount recognized in the consolidated financial statements.
Business Combinations	Business Combinations - We recognize and measure identifiable tangible and intangible assets acquired and liabilities assumed as of the acquisition date at fair value. Fair value measurements require extensive use of estimates and assumptions, including estimates of future cash flows to be generated by the acquired assets. The operating results of acquired businesses are included in our consolidated financial statements beginning on the date of acquisition. The purchase price is equivalent to the fair value of consideration transferred. Goodwill is recognized for the excess of purchase price over the net fair value of assets acquired and liabilities assumed.
Contingent Purchase Price Liabilities	Contingent Purchase Price Liabilities -
Interest Rate Derivative Instruments	Interest Rate Derivative Instruments - We maintain interest rate swaps that are designated as cash flow hedges to manage the market risk from changes in interest rates on our floating-rate debt under our $2.0 billion unsecured credit facility, by and among CBIZ Operations, Inc., CBIZ, Inc. and Bank of America, N.A., as administrative agent and bank, and other participating banks. The designation of a derivative instrument as a hedge and its ability to meet the hedge accounting criteria determine how we reflect the change in fair value of the derivative instrument. A derivative qualifies for hedge accounting treatment if, at inception, it meets defined correlation and effectiveness criteria. These criteria require that the anticipated cash flows and/or changes in fair value of the hedging instrument substantially offset those of the position being hedged.
Recent Accounting Pronouncements, Accounting Standards Adopted, and Accounting Standards Issued But Not Yet Adopted	Recent Accounting Pronouncements - The FASB ASC is the sole source of authoritative GAAP other than the SEC issued rules and regulations that apply only to SEC registrants. The FASB issues an ASU to communicate changes to the FASB codification. We assess and review the impact of all ASUs. ASUs not listed below were reviewed and determined to be either not applicable or are not expected to have a material impact on the consolidated financial statements. Accounting Standards Adopted in 2024 In November 2023, the FASB issued ASU No. 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures, which improves reportable segment disclosure requirements, primarily through enhanced disclosure about significant segment expenses. We adopted ASU No. 2023-07 for the annual reporting period ending December 31, 2024, and disclosure of the significant segment expenses can be found in Note 19, Segment Disclosure, for the years ended December 31, 2024, 2023 and 2022. Accounting Standards Issued But Not Yet Adopted In December 2023, the FASB issued ASU No. 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures, which requires disaggregated information about an entity's effective tax rate reconciliation as well as information on income tax paid. The guidance in this ASU is effective for public companies with annual periods beginning after December 15, 2024. We plan to adopt the guidance for the fiscal year ending December 31, 2025. We are currently evaluating the effect adoption of this ASU will have on our consolidated financial statements

BASIS OF PRESENTATION AND SIG_3

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Tables)	12 Months Ended
	Dec. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Summary of Estimated Useful Lives Property and Equipment	Depreciation and amortization are provided on a straight-line basis over the following estimated useful lives: Buildings 25 to 40 years Furniture and fixtures 5 to 10 years Capitalized software 3 to 5 years Equipment 3 to 7 years

BUSINESS COMBINATIONS (Tables)

BUSINESS COMBINATIONS (Tables)	12 Months Ended
	Dec. 31, 2024
Business Combination, Asset Acquisition, and Joint Venture Formation [Abstract]
Summary of Business Acquisitions, by Acquisition	At closing, the purchase price for the purpose of the Merger consisted of an aggregate of $1,063.0 million of net cash consideration and $934.7 million of the Company’s common stock, which represents a fair value of 13.6 million shares issued as stock consideration. Fair Value of Purchase Consideration Cash consideration (1) $ 1,063,037 Share consideration (2) 934,744 Total $ 1,997,781 (1) Reflects the amount of cash consideration, which is equal to the Cash Payment Amount of $1,142.4 million as defined in the Merger Agreement, adjusted for the assumed indebtedness as outlined in the Merger Agreement, consisting of contingent consideration expected to be paid within 18 months of close, earned bonuses for Marcum employees, certain specific deferred revenue balances, and adjustments for certain lease liabilities, plus Marcum's finance lease obligations settled by the Company at close. (2)
Summary of Recognized Identified Assets Acquired and Liabilities Assumed	The following table summarizes the preliminary acquisition date fair value of net tangible and intangible assets acquired, net of liabilities assumed from Marcum, with the excess recorded as goodwill (in thousands): On November 1, 2024 Fair Value Total consideration transferred $ 1,997,781 Asset acquired: Account receivable 170,139 Unbilled revenue 23,247 Other current assets 25,914 Property and equipment 31,292 Other intangible assets 490,000 Right-of- use asset 164,970 Deferred income taxes, net 3,427 Total identifiable asset acquired 908,989 Liabilities assumed: Account payable 25,370 Accrued personnel costs 44,650 Other current liabilities 27,267 Contingent purchase price assumed (current and non-current) 24,232 Lease liabilities (current and non-current) 172,792 Other non-current liabilities 61,967 Total liabilities assumed 356,278 Net asset acquired 552,711 Goodwill $ 1,445,070
Summary of Identifiable Intangible Assets Acquired	The following table summarizes key information underlying identifiable intangible assets related to the Transaction (in thousands): Weighted Average Useful Life (in years) Fair Value Client lists 10.0 $ 474,000 Non-competition agreements 3.0 16,000 Unfavorable leaseholds, net 7.9 (7,822) Total $ 482,178
Summary of Pro Forma Financial Information	The following table summarizes, on an unaudited pro forma basis, the condensed combined results of operations of the Company for the year ended December 31, 2024 and 2023, assuming the Transaction had occurred on January 1, 2023 (in thousands). For the year ended December 31, 2024 2023 Net Sales $ 2,790,091 $ 2,698,828 Net Income $ 111,015 $ 88,371
Summary of Segment Allocation	The following table summarizes the aggregated goodwill and intangible asset amounts resulting from the Other 2024 Acquisitions and the 2023 Acquisitions for the twelve months ended December 31, 2024 and 2023, respectively (in thousands): Twelve Months Ended December 31, 2024 2023 Financial Services Benefits & Insurance Financial Services Benefits & Insurance Goodwill $ 25,237 $ 2,345 $ 41,322 $ 3,932 Client list 10,514 2,644 33,196 2,053 Other intangibles — — 18 — Total $ 35,751 $ 4,989 $ 74,536 $ 5,985
Summary of Contingent Consideration	The following table summarizes the changes in contingent purchase price consideration for previous acquisitions and contingent payments made for previous business acquisitions during the year ended December 31, 2024 and 2023, respectively (in thousands): 2024 2023 Net expense 6,994 2,743 Cash settlement paid 56,594 45,010 Shares issued (number) 126 140

REVENUE (Tables)

REVENUE (Tables)	12 Months Ended
	Dec. 31, 2024
Revenue from Contract with Customer [Abstract]
Summary of Disaggregation of Revenue by Source	The following tables disaggregate our revenue by source (in thousands): For the Year Ended December 31, 2024 Financial Benefits and National Consolidated Accounting, tax, advisory and consulting $ 1,362,539 $ — $ — $ 1,362,539 Core Benefits and Insurance Services — 383,550 — 383,550 Non-core Benefits and Insurance Services — 17,498 — 17,498 Managed networking, hardware services — — 41,526 41,526 National Practices consulting — — 8,359 8,359 Total revenue $ 1,362,539 $ 401,048 $ 49,885 $ 1,813,472 For the Year Ended December 31, 2023 Financial Benefits and National Consolidated Accounting, tax, advisory and consulting $ 1,160,686 $ — $ — $ 1,160,686 Core Benefits and Insurance Services — 365,848 — 365,848 Non-core Benefits and Insurance Services — 16,757 — 16,757 Managed networking, hardware services — — 36,984 36,984 National Practices consulting — — 10,919 10,919 Total revenue $ 1,160,686 $ 382,605 $ 47,903 $ 1,591,194 For the Year Ended December 31, 2022 Financial Benefits and National Consolidated Accounting, tax, advisory and consulting $ 1,010,068 $ — $ — $ 1,010,068 Core Benefits and Insurance Services — 342,063 — 342,063 Non-core Benefits and Insurance Services — 15,944 — 15,944 Managed networking, hardware services — — 33,503 33,503 National Practices consulting — — 10,401 10,401 Total revenue $ 1,010,068 $ 358,007 $ 43,904 $ 1,411,979

ACCOUNTS RECEIVABLE, NET (Table

ACCOUNTS RECEIVABLE, NET (Tables)	12 Months Ended
	Dec. 31, 2024
Receivables [Abstract]
Summary of Accounts Receivable, Net	Accounts receivable, net balances at December 31, 2024 and 2023 were as follows (in thousands): 2024 2023 Trade accounts receivable $ 416,211 $ 309,640 Unbilled revenue, at net realizable value 150,362 96,110 Total accounts receivable 566,573 405,750 Allowance for doubtful accounts (31,715) (25,598) Accounts receivable, net $ 534,858 $ 380,152
Summary of Changes to the Allowance for Doubtful Accounts on Accounts Receivable	Changes in the allowance for doubtful accounts on accounts receivable are as follows (in thousands): 2024 2023 2022 Balance at beginning of period $ (25,598) $ (20,801) $ (16,158) Provision (19,979) (13,681) (13,545) Charge-offs, net of recoveries 13,862 8,884 8,902 Balance at end of period $ (31,715) $ (25,598) $ (20,801)

PROPERTY AND EQUIPMENT, NET (Ta

PROPERTY AND EQUIPMENT, NET (Tables)	12 Months Ended
	Dec. 31, 2024
Property, Plant and Equipment [Abstract]
Summary of Property and Equipment, Net	Property and equipment, net at December 31, 2024 and 2023 consisted of the following (in thousands): 2024 2023 Buildings and leasehold improvements $ 81,753 $ 58,537 Furniture and fixtures 44,192 36,039 Capitalized software 32,906 34,635 Equipment 45,365 39,398 Total property and equipment 204,216 168,609 Accumulated depreciation (116,053) (111,597) Property and equipment, net $ 88,163 $ 57,012

GOODWILL AND OTHER INTANGIBLE_2

GOODWILL AND OTHER INTANGIBLE ASSETS, NET (Tables)	12 Months Ended
	Dec. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of Changes in Carrying Amount of Goodwill by Operating Segment	A summary of changes in the carrying amount of goodwill by operating segment for the years ended December 31, 2024 and 2023 were as follows (in thousands): Financial Benefits and National Total Gross $ 549,906 $ 320,125 $ 33,873 $ 903,904 Accumulated impairment (44,047) (7,733) (32,207) (83,987) Net at December 31, 2022 $ 505,859 $ 312,392 $ 1,666 $ 819,917 Additions 41,322 3,932 — 45,254 Divestitures and other adjustments 9 — — 9 Gross 591,237 324,057 33,873 949,167 Accumulated impairment (44,047) (7,733) (32,207) (83,987) Net at December 31, 2023 $ 547,190 $ 316,324 $ 1,666 $ 865,180 Additions 1,458,747 13,905 — 1,472,652 Divestitures and other adjustments (6,371) — — (6,371) Gross 2,043,613 337,962 33,873 2,415,448 Accumulated impairment (44,047) (7,733) (32,207) (83,987) Net at December 31, 2024 $ 1,999,566 $ 330,229 $ 1,666 $ 2,331,461
Summary of Components of Goodwill and Other Intangible Assets, Net	The components of goodwill and other intangible assets, net at December 31, 2024 and 2023 were as follows (in thousands): 2024 2023 Goodwill $ 2,331,461 $ 865,180 Intangibles : Client lists 820,564 338,237 Other intangibles 32,481 11,481 Total intangibles 853,045 349,718 Total goodwill and other intangibles assets 3,184,506 1,214,898 Accumulated amortization: Client lists (227,943) (196,412) Other intangibles (11,093) (9,882) Total accumulated amortization (239,036) (206,294) Goodwill and other intangible assets, net $ 2,945,470 $ 1,008,604

FINANCIAL INSTRUMENTS (Tables)

FINANCIAL INSTRUMENTS (Tables)	12 Months Ended
	Dec. 31, 2024
Investments, All Other Investments [Abstract]
Summary of Investments	The following table summarizes our bond activity for the years ended December 31, 2024 and 2023 (in thousands): 2024 2023 Fair value at January 1 $ 39,459 $ 43,485 Purchases 23,210 14,122 Redemptions (500) (3,310) Maturities (21,423) (15,155) Change in bond premium (386) (1,099) Fair market value adjustment 639 1,416 Fair value at December 31 $ 40,999 $ 39,459
Summary of Outstanding Interest Rate Swaps	The following table summarizes our outstanding interest rate swaps and their classification in the accompanying Consolidated Balance Sheets at December 31, 2024 and 2023 (in thousands). Refer to Note 8, Fair Value Measurements, for additional disclosures regarding fair value measurements. December 31, 2024 Notional Fixed Rate Expiration Fair Balance Sheet Location Interest rate swap $ 50,000 0.834% 4/14/2025 $ 495 Other current asset Interest rate swap $ 30,000 1.186% 12/14/2026 $ 1,604 Other non-current asset Interest rate swap $ 20,000 2.450% 8/14/2027 $ 776 Other non-current asset Interest rate swap $ 25,000 3.669% 4/14/2028 $ 243 Other non-current asset Interest rate swap $ 25,000 4.488% 10/14/2028 $ (437) Other non-current liability December 31, 2023 Notional Fixed Rate Expiration Fair Balance Sheet Location Interest rate swap $ 50,000 0.834% 4/14/2025 $ 2,282 Other current asset Interest rate swap $ 30,000 1.186% 12/14/2026 $ 2,125 Other non-current asset Interest rate swap $ 20,000 2.450% 8/14/2027 $ 784 Other non-current asset Interest rate swap $ 25,000 3.669% 4/14/2028 $ (129) Other non-current liability Interest rate swap $ 25,000 4.488% 10/14/2028 $ (1,063) Other non-current liability
Summary of Effects of Interest Rate Swap	The following table summarizes the effects of the interest rate swap on our accompanying Consolidated Statements of Comprehensive Income for the years ended December 31, 2024 and 2023 (in thousands): Gain recognized in Gain reclassified from Twelve Months Ended December 31, Twelve Months Ended December 31, Location 2024 2023 2024 2023 Interest rate swaps $ 2,396 $ 393 $ 4,513 $ 4,285 Interest expense

FAIR VALUE MEASUREMENTS (Tables

FAIR VALUE MEASUREMENTS (Tables)	12 Months Ended
	Dec. 31, 2024
Fair Value Disclosures [Abstract]
Summary of Assets and Liabilities Measured at Fair Value on a Recurring Basis	The following table summarizes our assets and (liabilities) at December 31, 2024 and 2023 that are measured at fair value on a recurring basis subsequent to initial recognition and indicates the fair value hierarchy of the valuation techniques utilized by us to determine such fair value (in thousands): Level December 31, 2024 December 31, 2023 Deferred compensation plan assets 1 167,170 143,499 Available-for-sale debt securities 1 40,999 39,459 Other depository assets 1 176 1,031 Deferred compensation plan liabilities 1 (167,170) (143,499) Interest rate swaps, net 2 2,681 3,999 Bank debt 2 (1,399,932) (310,826) Contingent purchase price liabilities 3 (96,967) (114,946)
Summary of Change in Level 3 Fair Values of Contingent Purchase Price Liabilities	The following table summarizes the change in fair value of our contingent purchase price liabilities identified as Level 3 for the years ended December 31, 2024 and 2023 (pre-tax basis, in thousands): Contingent Beginning balance — December 31, 2022 $ (132,010) Additions from business acquisitions (32,142) Settlement of contingent purchase price payable 51,949 Change in fair value of contingency 62 Change in net present value of contingency (2,805) Balance — December 31, 2023 $ (114,946) Additions from business acquisitions (40,034) Settlement of contingent purchase price payable 65,007 Change in fair value of contingency (4,710) Change in net present value of contingency (2,284) Balance — December 31, 2024 $ (96,967)

INCOME TAXES (Tables)

INCOME TAXES (Tables)	12 Months Ended
	Dec. 31, 2024
Income Tax Disclosure [Abstract]
Summary of Income Before Income Taxes	For financial reporting purposes, income before income taxes includes the following components (in thousands): 2024 2023 2022 United States $ 57,521 $ 165,869 $ 141,288 Foreign (Canada) 286 434 187 Total $ 57,807 $ 166,303 $ 141,475
Summary of Income Tax Expense Included in Consolidated Statements of Comprehensive Income	Income tax expense included in the accompanying Consolidated Statements of Comprehensive Income for the years ended December 31, 2024, 2023 and 2022 was as follows (in thousands): 2024 2023 2022 Current: Federal $ 23,362 $ 29,835 $ 20,910 Foreign 76 116 50 State and local 8,164 10,298 7,299 Total 31,602 40,249 28,259 Deferred: Federal (10,920) 3,978 5,667 State and local (3,913) 1,108 2,195 Total (14,833) 5,086 7,862 Total income tax expense 16,769 45,335 36,121
Summary of Provision for Income Taxes Attributable to Income from Continuing Operations	The provision for income taxes attributable to income operations differed from the amount obtained by applying the federal statutory income tax rate to income before income taxes, as follows (in thousands, except percentages): 2024 2023 2022 Tax at U.S. federal statutory rates $ 12,139 $ 34,924 $ 29,714 State taxes (net of federal benefit) 3,182 10,576 9,019 Reserves for uncertain tax positions 209 (241) 337 Share-based compensation (3,907) (5,820) (6,832) Meals and entertainment 1,193 1,168 337 Non-deductible officers' compensation 3,762 5,485 2,507 Other, net 191 (757) 1,039 Provision for income taxes $ 16,769 $ 45,335 $ 36,121 Effective income tax rate 29.0 % 27.3 % 25.5 %
Summary of Tax Effects of Temporary Differences That Rises to Significant Portions of Deferred Tax Assets and Deferred Tax Liabilities	The tax effects of temporary differences that gave rise to significant portions of the deferred tax assets and deferred tax liabilities at December 31, 2024 and 2023, were as follows (in thousands): 2024 2023 Deferred tax assets: Net operating loss carryforwards $ 2,912 $ 1,515 Allowance for doubtful accounts 7,596 4,876 Employee benefits and compensation 45,122 38,137 Acquisition-related costs 9,110 — Deferred revenue 4,446 — Property and equipment 141 — Lease liabilities 116,080 7,398 Other deferred tax assets 1,103 1,888 Total gross deferred tax assets 186,510 53,814 Less: valuation allowance (2,941) (2,721) Total deferred tax assets, net 183,569 51,093 Deferred tax liabilities: Goodwill and other intangibles 85,771 77,005 Right of Use assets 105,478 — Property and equipment — 836 Other deferred tax liabilities 3,200 2,539 Total gross deferred tax liabilities 194,449 80,380 Deferred income taxes, net $ (10,880) $ (29,287)
Summary of Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits	A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows (in thousands): 2024 2023 2022 Balance at January 1 $ 1,847 $ 2,111 $ 1,594 Additions for tax positions of the current year 197 178 175 Additions for positions of prior years 168 103 486 Lapse of statutes of limitation (174) (545) (144) Balance at December 31 $ 2,038 $ 1,847 $ 2,111

DEBT AND FINANCING ARRANGEMEN_2

DEBT AND FINANCING ARRANGEMENTS (Tables)	12 Months Ended
	Dec. 31, 2024
Debt Disclosure [Abstract]
Summary of Unsecured Credit Facility	The blended interest rates under the 2024 Credit Facilities and 2022 Credit Facility, including the impact of interest rate swaps associated with those credit facilities, were as follows: 2024 2023 Weighted average blended interest rate 6.00% 5.23% Range of blended interest rates 1.93% - 6.84% 1.93% - 8.00%
Summary of Recognized Interest Expense	Interest expense, including amortization of deferred financing costs, commitment fees, line of credit fees, and other applicable bank charges, was as follows (in thousands): 2024 2023 2022 Credit facilities $ 34,376 $ 20,093 $ 8,033 Other line of credit — 1 6 Other 3 37 — $ 34,379 $ 20,131 $ 8,039

ACCUMULATED OTHER COMPREHENSI_2

ACCUMULATED OTHER COMPREHENSIVE INCOME (Tables)	12 Months Ended
	Dec. 31, 2024
Equity [Abstract]
Summary of Components of Accumulated Other Comprehensive Income (Loss)	The components of accumulated other comprehensive income at December 31, 2024 and 2023 were as follows (in thousands): 2024 2023 Net unrealized loss of available-for-sale securities, net of income tax expense of $14 and income tax benefit of $168, respectively $ (48) $ (505) Net unrealized gain on interest rate swap, net of income tax expense of $685 and $972, respectively 2,075 3,064 Foreign currency translation (808) (781) Accumulated other comprehensive income $ 1,219 $ 1,778

EMPLOYEE STOCK PLANS (Tables)

EMPLOYEE STOCK PLANS (Tables)	12 Months Ended
	Dec. 31, 2024
Share-Based Payment Arrangement [Abstract]
Summary of Share-Based Compensation Awards	During the years ended December 31, 2024, 2023 and 2022, we recognized compensation expense (before income tax expense) for these awards as follows (in thousands): 2024 2023 2022 Stock options $ — $ 768 $ 248 Restricted stock units and awards 7,771 5,258 5,204 Performance share units 6,065 6,260 9,237 Total share-based compensation expense $ 13,836 $ 12,286 $ 14,689
Summary of Restricted Stock Award Activity	Restricted stock units and awards activity during the year ended December 31, 2024 was as follows (in thousands, except per share data): Number of Weighted Average Grant-Date Fair Value (1) Non-vested at December 31, 2023 223 $ 41.19 Granted (2) 810 $ 69.46 Vested (131) $ 38.76 Forfeited (3) $ 38.52 Non-vested at December 31, 2024 899 $ 67.01 (1) Represents weighted average market value of the shares as the awards are granted at no cost to the recipients. (2) As a result of the Transaction approximately 713 thousand shares were granted to certain employees and third-party providers.
Summary of PSU Award Activity	The following table presents our PSUs award activity during the twelve months ended December 31, 2024 (in thousands, except per share data): Performance Share Units Weighted Average Grant-Date Fair Value Per Unit (1) Outstanding at December 31, 2023 464 $ 33.84 Granted 70 $ 66.07 Vested (273) $ 27.51 Adjustments for performance results (2) 31 $ 38.12 Forfeited (7) $ 39.09 Outstanding at December 31, 2024 285 $ 48.18 ( 1) Represents weighted average market value of the shares; awards are granted at no cost to the recipients.

EARNINGS PER SHARE (Tables)

EARNINGS PER SHARE (Tables)	12 Months Ended
	Dec. 31, 2024
Earnings Per Share [Abstract]
Summary of Computation of Basic and Diluted Earnings Per Share from Continuing Operations	The following table sets forth the reconciliation of the numerator and the denominator of basic earnings per share and diluted earnings per share for the years ended December 31, 2024, 2023, and 2022 (in thousands, except per share data): Year Ended December 31, 2024 2023 2022 Numerator: Net income $ 41,038 $ 120,968 $ 105,354 Denominator: Basic Weighted average common shares outstanding 52,375 49,989 51,502 Diluted Stock options 78 172 487 Restricted stock awards (1) 78 98 141 Contingent shares (2) 3 21 14 Performance share units (3) 127 277 244 Diluted weighted average common shares outstanding 52,661 50,557 52,388 Earnings Per Share: Basic earnings per share $ 0.78 $ 2.42 $ 2.05 Diluted earnings per share $ 0.78 $ 2.39 $ 2.01 (1) For the years ended December 31, 2024, 2023 and 2022, a total of 173 thousand, 58 thousand and 68 thousand stock based awards, respectively, were excluded from the calculation of diluted earnings per share as their exercise prices would render them anti-dilutive. (2) Contingent shares represent additional shares to be issued for purchase price earned by former owners of businesses acquired by us once future conditions have been met. For further details, refer to Note 2, Business Combinations . (3) The denominator used in calculating diluted earnings per share did not include 0.2 million, 0.2 million and 0.2 million performance share units for the twelve months ended December 31, 2024, 2023 and 2022, respectively. The performance conditions associated with these performance share units were not met and consequently none of these performance share units were considered as issuable for the years ended December 31, 2024, 2023 and 2022.

LEASES (Tables)

LEASES (Tables)	12 Months Ended
	Dec. 31, 2024
Leases [Abstract]
Summary of Balance Sheet Information Related to Leases	Supplemental balance sheet information related to the Company’s operating leases as of December 31, 2024 and 2023 was as follows (in thousands): December 31, 2024 December 31, 2023 Weighted-average remaining lease term 7.5 years 7.3 years Weighted-average discount rate 5.91 % 5.51 %
Summary of Lease Cost and Other Lease Information	The components of lease cost and other lease information as of and during the year ended December 31, 2024 and 2023 are as follows (in thousands): December 31, 2024 December 31, 2023 Operating lease cost $ 51,783 $ 45,088 Cash paid for amounts included in measurement of lease liabilities Operating cash flows for operating leases $ 52,483 $ 46,936
Summary of Maturity of Operating Lease Liabilities	Maturities of operating lease liabilities at December 31, 2024 and minimum cash commitments under operating leases at December 31, 2023 were as follows (in thousands): December 31, 2024 2025 $ 84,270 2026 83,995 2027 80,062 2028 63,907 2029 55,120 Thereafter 178,389 Total undiscounted lease payments 545,743 Less: imputed interest (112,608) Total lease liabilities $ 433,135 December 31, 2023 2024 $ 47,446 2025 46,623 2026 43,131 2027 40,678 2028 29,261 Thereafter 90,535 Total undiscounted lease payments 297,674 Less: imputed interest (57,486) Total lease liabilities $ 240,188

SEGMENT DISCLOSURES (Tables)

SEGMENT DISCLOSURES (Tables)	12 Months Ended
	Dec. 31, 2024
Segment Reporting [Abstract]
Summary of Revenue from External Customers	We operate in the United States and Canada and revenue generated from such operations during the years ended December 31, 2024, 2023 and 2022 was as follows (in thousands): Year Ended December 31, 2024 2023 2022 United States $ 1,811,113 $ 1,589,478 $ 1,410,255 Canada 2,359 1,716 1,724 Total revenue $ 1,813,472 $ 1,591,194 $ 1,411,979
Summary of Segment Information	The practice groups respective revenue and pre-tax income, significant segment expenses, and a reconciliation of segment profit or loss measure to the consolidated income before income tax expense for the years ended December 31, 2024, 2023 and 2022 are presented below (in thousands). For the Year Ended December 31, 2024 Financial Benefits and National Total Revenue from external customers $ 1,362,539 $ 401,048 $ 49,885 $ 1,813,472 Significant expenses: Personnel costs 972,730 257,166 42,913 1,272,809 Facility costs 55,178 12,481 177 67,836 Other costs, gains, and losses, net (1) 185,091 58,476 (3,394) 240,173 Total segment expense 1,212,999 328,123 39,696 1,580,818 Segment income before income tax expenses 149,540 72,925 10,189 232,654 Corporate & other: Unallocated corporate operating expenses 44,485 General & administrative expenses 108,753 Interest expense 34,374 Other income, net (12,765) Consolidated income before income tax expenses $ 57,807 For the Year Ended December 31, 2023 Financial Benefits and National Total Revenue from external customers $ 1,160,686 $ 382,605 $ 47,903 $ 1,591,194 Significant expenses: Personnel costs 793,791 242,340 40,949 1,077,080 Facility costs 44,444 12,196 250 56,890 Other costs, gains, and losses, net (1) 134,623 53,916 1,860 190,399 Total segment expense 972,858 308,452 43,059 1,324,369 Segment income before income tax expenses 187,828 74,153 4,844 266,825 Corporate & other: Unallocated corporate operating expenses 39,344 General & administrative expenses 57,965 Interest expense 20,129 Other income, net (16,916) Consolidated income before income tax expenses $ 166,303 For the Year Ended December 31, 2022 Financial Benefits and National Total Revenue from external customers $ 1,010,068 $ 358,007 $ 43,904 $ 1,411,979 Significant expenses: Personnel costs 688,555 225,871 36,832 951,258 Facility costs 42,617 12,831 250 55,698 Other costs, gains, and losses, net (1) 118,184 49,299 2,109 169,592 Total segment expense 849,356 288,001 39,191 1,176,548 Segment income before income tax expenses 160,712 70,006 4,713 235,431 Corporate & other: Unallocated corporate operating expenses 8,986 General & administrative expenses 55,023 Interest expense 8,033 Other expense, net 21,914 Consolidated income before income tax expenses $ 141,475 (1)

BASIS OF PRESENTATION AND SIG_4

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details) $ in Thousands		12 Months Ended
	Nov. 01, 2024 reporting_unit	Dec. 31, 2024 USD ($) reporting_unit practice_group	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Number of practice groups | practice_group		3
Revenue		$ 1,813,472	$ 1,591,194	$ 1,411,979
Notes receivable		$ 22,200
Maximum maturity period of investments		3 months
Allowance for doubtful accounts		$ 31,715	25,598	20,801	$ 16,158
Goodwill		2,331,461	865,180	819,917
Assets		4,470,883	2,043,592
Total stockholders' equity		$ 1,779,983	791,618	713,452	$ 704,548
Intangible assets amortization period		9 years 1 month 6 days
Number of reporting units | reporting_unit	6	6
Increase (decrease) in the fair value of contingent consideration, net		$ 6,993	2,743	2,435
Unsecured credit facility		2,000,000
Other income (expense), net
Summary Of Significant Accounting Policies [Line Items]
Increase (decrease) in the fair value of contingent consideration, net		$ (7,000)	(2,700)	(2,400)
Performance share units
Summary Of Significant Accounting Policies [Line Items]
Shares vesting term		3 years
Minimum
Summary Of Significant Accounting Policies [Line Items]
Shares vesting term		3 years
Intangible assets amortization period		3 years
Minimum | Capitalized software
Summary Of Significant Accounting Policies [Line Items]
Property and equipment useful life		3 years
Maximum
Summary Of Significant Accounting Policies [Line Items]
Shares vesting term		4 years
Intangible assets amortization period		15 years
Maximum | Capitalized software
Summary Of Significant Accounting Policies [Line Items]
Property and equipment useful life		5 years
Financial service
Summary Of Significant Accounting Policies [Line Items]
Revenue		$ 306,500	$ 259,600	$ 235,400

BASIS OF PRESENTATION AND SIG_5

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Summary of Estimated Useful Lives Property and Equipment (Details)	Dec. 31, 2024
Buildings | Minimum
Summary Of Significant Accounting Policies [Line Items]
Property and equipment useful life	25 years
Buildings | Maximum
Summary Of Significant Accounting Policies [Line Items]
Property and equipment useful life	40 years
Furniture and fixtures | Minimum
Summary Of Significant Accounting Policies [Line Items]
Property and equipment useful life	5 years
Furniture and fixtures | Maximum
Summary Of Significant Accounting Policies [Line Items]
Property and equipment useful life	10 years
Capitalized software | Minimum
Summary Of Significant Accounting Policies [Line Items]
Property and equipment useful life	3 years
Capitalized software | Maximum
Summary Of Significant Accounting Policies [Line Items]
Property and equipment useful life	5 years
Equipment | Minimum
Summary Of Significant Accounting Policies [Line Items]
Property and equipment useful life	3 years
Equipment | Maximum
Summary Of Significant Accounting Policies [Line Items]
Property and equipment useful life	7 years

BUSINESS COMBINATIONS - Additio

BUSINESS COMBINATIONS - Additional Information (Details) $ in Thousands, shares in Millions			2 Months Ended	12 Months Ended
	Nov. 01, 2024 USD ($) shares	Jul. 01, 2023 client	Dec. 31, 2024 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Business Acquisition, Contingent Consideration [Line Items]
Cash consideration				$ 1,087,521	$ 53,110	$ 79,141
Goodwill			$ 2,331,461	2,331,461	865,180	819,917
Number of clients from acquiree | client		1,200
Annual aggregate revenue				$ 2,790,091	2,698,828
Client lists
Business Acquisition, Contingent Consideration [Line Items]
Weighted Average Useful Life (in years)				10 years
Other intangibles
Business Acquisition, Contingent Consideration [Line Items]
Weighted Average Useful Life (in years)				3 years
Benefits and Insurance Services
Business Acquisition, Contingent Consideration [Line Items]
Goodwill			330,229	$ 330,229	316,324	$ 312,392
Marcum LLP
Business Acquisition, Contingent Consideration [Line Items]
Revenues			108,900
Operating losses			57,100
Amortization of intangible assets			8,900
Cash consideration	$ 1,063,037
Common stock	$ 934,744
Equity interest issued or issuable (in shares) | shares	13.6
Amount of goodwill deductible for income tax purposes	$ 379,500
Goodwill	1,445,070
Deferred income taxes, net	3,427		3,400	3,400
Transaction and integration related costs				28,700
Total consideration transferred	1,997,781
Cash payment amount	1,142,400
Contingent purchase price assumed (current and non-current)	$ 24,232
Marcum LLP | Client lists
Business Acquisition, Contingent Consideration [Line Items]
Weighted Average Useful Life (in years)	10 years
Marcum LLP | Financial Services Practice Group
Business Acquisition, Contingent Consideration [Line Items]
Goodwill	$ 1,433,500
Marcum LLP | Benefits and Insurance Services
Business Acquisition, Contingent Consideration [Line Items]
Goodwill	$ 11,600
Other 2024 Acquisitions
Business Acquisition, Contingent Consideration [Line Items]
Common stock				2,400
Total consideration transferred				42,200
Cash payment amount				24,000
Contingent purchase price assumed (current and non-current)			$ 15,800	15,800
Annual aggregate revenue				$ 28,700
2023 Acquisitions
Business Acquisition, Contingent Consideration [Line Items]
Common stock					4,800
Total consideration transferred					90,000
Cash payment amount					53,000
Contingent purchase price assumed (current and non-current)					32,100
Annual aggregate revenue					$ 64,900

BUSINESS COMBINATIONS - Summary

BUSINESS COMBINATIONS - Summary of Business Acquisitions, by Acquisition (Details) $ / shares in Units, $ in Thousands, shares in Millions					12 Months Ended
	Feb. 03, 2025 shares	Jan. 02, 2025 shares	Nov. 01, 2024 USD ($) $ / shares shares	Oct. 31, 2024	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Feb. 27, 2025 installment shares
Business Acquisition [Line Items]
Cash consideration					$ 1,087,521	$ 53,110	$ 79,141
Marcum LLP
Business Acquisition [Line Items]
Cash consideration			$ 1,063,037
Share consideration			934,744
Total			1,997,781
Cash payment amount			$ 1,142,400
Contingent consideration, period			18 months
Equity interest issued or issuable (in shares) | shares			13.6
Base purchase price			$ 2,247,700
Share price (in dollars per share) | $ / shares			$ 76.84
Equity interest issued or issuable, gross (in shares) | shares			14.3
Share-based compensation awards subject to continued service requirements (in shares) | shares			0.7
Expected term				3 years 1 month 6 days
Marcum LLP | Volatility
Business Acquisition [Line Items]
Stock price, measurement input				0.35
Marcum LLP | Subsequent Event
Business Acquisition [Line Items]
Shares issued during period for acquisitions (in shares) | shares	0.3	3.1
Remaining number of shares issuable (in shares) | shares								10.2
Number of monthly installments for remaining shares issuable | installment								34

BUSINESS COMBINATIONS - Summa_2

BUSINESS COMBINATIONS - Summary of Recognized Identified Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Nov. 01, 2024	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Liabilities assumed:
Goodwill		$ 2,331,461	$ 865,180	$ 819,917
Marcum LLP
Business Acquisition [Line Items]
Total consideration transferred	$ 1,997,781
Asset acquired:
Account receivable	170,139
Unbilled revenue	23,247
Other current assets	25,914
Property and equipment	31,292
Other intangible assets	490,000
Right-of- use asset	164,970
Deferred income taxes, net	3,427	$ 3,400
Total identifiable asset acquired	908,989
Liabilities assumed:
Account payable	25,370
Accrued personnel costs	44,650
Other current liabilities	27,267
Contingent purchase price assumed (current and non-current)	24,232
Lease liabilities (current and non-current)	172,792
Other non-current liabilities	61,967
Total liabilities assumed	356,278
Net asset acquired	552,711
Goodwill	$ 1,445,070

BUSINESS COMBINATIONS - Summa_3

BUSINESS COMBINATIONS - Summary of Identifiable Intangible Assets Acquired (Details) - USD ($) $ in Thousands		12 Months Ended
	Nov. 01, 2024	Dec. 31, 2024
Client lists
Business Acquisition [Line Items]
Weighted Average Useful Life (in years)		10 years
Marcum LLP
Business Acquisition [Line Items]
Fair Value	$ 482,178
Marcum LLP | Client lists
Business Acquisition [Line Items]
Weighted Average Useful Life (in years)	10 years
Fair Value	$ 474,000
Marcum LLP | Non-competition agreements
Business Acquisition [Line Items]
Weighted Average Useful Life (in years)	3 years
Fair Value	$ 16,000
Marcum LLP | Unfavorable leaseholds, net
Business Acquisition [Line Items]
Weighted Average Useful Life (in years)	7 years 10 months 24 days
Fair Value	$ (7,822)

BUSINESS COMBINATIONS - Summa_4

BUSINESS COMBINATIONS - Summary of Pro Forma Financial Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Business Combination, Asset Acquisition, and Joint Venture Formation [Abstract]
Net Sales	$ 2,790,091	$ 2,698,828
Net Income	$ 111,015	$ 88,371

BUSINESS COMBINATIONS - Summa_5

BUSINESS COMBINATIONS - Summary of Segment Allocation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Business Combination Segment Allocation [Line Items]
Goodwill	$ 1,472,652	$ 45,254
Financial Services
Business Combination Segment Allocation [Line Items]
Goodwill	1,458,747	41,322
Financial Services | Other 2024 Acquisitions and 2023 Acquisitions
Business Combination Segment Allocation [Line Items]
Goodwill	25,237	41,322
Total	35,751	74,536
Financial Services | Client lists | Other 2024 Acquisitions and 2023 Acquisitions
Business Combination Segment Allocation [Line Items]
Intangibles	10,514	33,196
Financial Services | Other intangibles | Other 2024 Acquisitions and 2023 Acquisitions
Business Combination Segment Allocation [Line Items]
Intangibles	0	18
Benefits and Insurance Services
Business Combination Segment Allocation [Line Items]
Goodwill	13,905	3,932
Benefits and Insurance Services | Other 2024 Acquisitions and 2023 Acquisitions
Business Combination Segment Allocation [Line Items]
Goodwill	2,345	3,932
Total	4,989	5,985
Benefits and Insurance Services | Client lists | Other 2024 Acquisitions and 2023 Acquisitions
Business Combination Segment Allocation [Line Items]
Intangibles	2,644	2,053
Benefits and Insurance Services | Other intangibles | Other 2024 Acquisitions and 2023 Acquisitions
Business Combination Segment Allocation [Line Items]
Intangibles	$ 0	$ 0

BUSINESS COMBINATIONS - Summa_6

BUSINESS COMBINATIONS - Summary of Contingent Consideration (Details) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Business Combination, Asset Acquisition, and Joint Venture Formation [Abstract]
Net expense	$ 6,994	$ 2,743
Cash settlement paid	$ 56,594	$ 45,010
Shares issued (number) (in shares)	126	140

REVENUE (Details)

REVENUE (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Total revenue	$ 1,813,472	$ 1,591,194	$ 1,411,979
Financial Services
Disaggregation of Revenue [Line Items]
Total revenue	1,362,539	1,160,686	1,010,068
Benefits and Insurance Services
Disaggregation of Revenue [Line Items]
Total revenue	401,048	382,605	358,007
National Practices
Disaggregation of Revenue [Line Items]
Total revenue	49,885	47,903	43,904
Accounting, tax, advisory and consulting
Disaggregation of Revenue [Line Items]
Total revenue	1,362,539	1,160,686	1,010,068
Accounting, tax, advisory and consulting | Financial Services
Disaggregation of Revenue [Line Items]
Total revenue	1,362,539	1,160,686	1,010,068
Core Benefits and Insurance Services
Disaggregation of Revenue [Line Items]
Total revenue	383,550	365,848	342,063
Core Benefits and Insurance Services | Benefits and Insurance Services
Disaggregation of Revenue [Line Items]
Total revenue	383,550	365,848	342,063
Non-core Benefits and Insurance Services
Disaggregation of Revenue [Line Items]
Total revenue	17,498	16,757	15,944
Non-core Benefits and Insurance Services | Benefits and Insurance Services
Disaggregation of Revenue [Line Items]
Total revenue	17,498	16,757	15,944
Managed networking, hardware services
Disaggregation of Revenue [Line Items]
Total revenue	41,526	36,984	33,503
Managed networking, hardware services | National Practices
Disaggregation of Revenue [Line Items]
Total revenue	41,526	36,984	33,503
National Practices consulting
Disaggregation of Revenue [Line Items]
Total revenue	8,359	10,919	10,401
National Practices consulting | National Practices
Disaggregation of Revenue [Line Items]
Total revenue	$ 8,359	$ 10,919	$ 10,401

ACCOUNTS RECEIVABLE, NET - Summ

ACCOUNTS RECEIVABLE, NET - Summary of Accounts Receivables Net (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Receivables [Abstract]
Trade accounts receivable	$ 416,211	$ 309,640
Unbilled revenue, at net realizable value	150,362	96,110
Total accounts receivable	566,573	405,750
Allowance for doubtful accounts	(31,715)	(25,598)	$ (20,801)	$ (16,158)
Accounts receivable, net	$ 534,858	$ 380,152

ACCOUNTS RECEIVABLE, NET - Su_2

ACCOUNTS RECEIVABLE, NET - Summary of Changes to the Allowance for Doubtful Accounts on Accounts Receivable (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	$ (25,598)	$ (20,801)	$ (16,158)
Provision	(19,979)	(13,681)	(13,545)
Charge-offs, net of recoveries	13,862	8,884	8,902
Balance at end of period	$ (31,715)	$ (25,598)	$ (20,801)

PROPERTY AND EQUIPMENT, NET - S

PROPERTY AND EQUIPMENT, NET - Summary of Property and Equipment, Net (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 204,216	$ 168,609
Accumulated depreciation	(116,053)	(111,597)
Property and equipment, net	88,163	57,012
Buildings and leasehold improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	81,753	58,537
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Total property and equipment	44,192	36,039
Capitalized software
Property, Plant and Equipment [Line Items]
Total property and equipment	32,906	34,635
Equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 45,365	$ 39,398

PROPERTY AND EQUIPMENT, NET - A

PROPERTY AND EQUIPMENT, NET - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Abstract]
Depreciation expense for property and equipment	$ 15.3	$ 12.5	$ 11.2

GOODWILL AND OTHER INTANGIBLE_3

GOODWILL AND OTHER INTANGIBLE ASSETS, NET - Summary of Changes in Carrying Amount of Goodwill by Operating Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Gross	$ 2,415,448	$ 949,167	$ 903,904
Accumulated impairment	(83,987)	(83,987)	(83,987)
Goodwill [Roll Forward]
Beginning balance, Goodwill	865,180	819,917
Additions	1,472,652	45,254
Divestitures and other adjustments	(6,371)	9
Ending balance, Goodwill	2,331,461	865,180
Financial Services
Finite-Lived Intangible Assets [Line Items]
Gross	2,043,613	591,237	549,906
Accumulated impairment	(44,047)	(44,047)	(44,047)
Goodwill [Roll Forward]
Beginning balance, Goodwill	547,190	505,859
Additions	1,458,747	41,322
Divestitures and other adjustments	(6,371)	9
Ending balance, Goodwill	1,999,566	547,190
Benefits and Insurance Services
Finite-Lived Intangible Assets [Line Items]
Gross	337,962	324,057	320,125
Accumulated impairment	(7,733)	(7,733)	(7,733)
Goodwill [Roll Forward]
Beginning balance, Goodwill	316,324	312,392
Additions	13,905	3,932
Divestitures and other adjustments	0	0
Ending balance, Goodwill	330,229	316,324
National Practices
Finite-Lived Intangible Assets [Line Items]
Gross	33,873	33,873	33,873
Accumulated impairment	(32,207)	(32,207)	$ (32,207)
Goodwill [Roll Forward]
Beginning balance, Goodwill	1,666	1,666
Additions	0	0
Divestitures and other adjustments	0	0
Ending balance, Goodwill	$ 1,666	$ 1,666

GOODWILL AND OTHER INTANGIBLE_4

GOODWILL AND OTHER INTANGIBLE ASSETS, NET - Additional Information (Details)		2 Months Ended	12 Months Ended
	Nov. 01, 2024 USD ($) reporting_unit	Dec. 31, 2024 USD ($)	Dec. 31, 2024 USD ($) reporting_unit	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Finite-Lived Intangible Assets [Line Items]
Number of reporting units | reporting_unit	6		6
Goodwill impairment	$ 0
Goodwill		$ 2,331,461,000	$ 2,331,461,000	$ 865,180,000	$ 819,917,000
Intangible assets amortization period		9 years 1 month 6 days	9 years 1 month 6 days
2025		$ 75,100,000	$ 75,100,000
2026		73,100,000	73,100,000
2027		71,100,000	71,100,000
2028		64,600,000	64,600,000
2029		64,000,000	64,000,000
Thereafter		$ 266,100,000	$ 266,100,000
Minimum
Finite-Lived Intangible Assets [Line Items]
Intangible assets amortization period		3 years	3 years
Maximum
Finite-Lived Intangible Assets [Line Items]
Intangible assets amortization period		15 years	15 years
Client Lists and Other Intangible Assets
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets			$ 32,700,000	23,800,000	21,700,000
Client lists
Finite-Lived Intangible Assets [Line Items]
Intangible assets amortization period		9 years 2 months 12 days	9 years 2 months 12 days
Other intangibles
Finite-Lived Intangible Assets [Line Items]
Intangible assets amortization period		6 years 3 months 18 days	6 years 3 months 18 days
Other intangibles | Minimum
Finite-Lived Intangible Assets [Line Items]
Intangible assets amortization period		3 years	3 years
Other intangibles | Maximum
Finite-Lived Intangible Assets [Line Items]
Intangible assets amortization period		15 years	15 years
Marcum LLP
Finite-Lived Intangible Assets [Line Items]
Goodwill	1,445,070,000
Amortization of intangible assets		$ 8,900,000
Financial Services Practice Group | Marcum LLP
Finite-Lived Intangible Assets [Line Items]
Goodwill	1,433,500,000
Benefits and Insurance Services
Finite-Lived Intangible Assets [Line Items]
Goodwill		$ 330,229,000	$ 330,229,000	$ 316,324,000	$ 312,392,000
Benefits and Insurance Services | Marcum LLP
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 11,600,000

GOODWILL AND OTHER INTANGIBLE_5

GOODWILL AND OTHER INTANGIBLE ASSETS, NET - Summary of Components of Goodwill and Other Intangible Assets, Net (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 2,331,461	$ 865,180	$ 819,917
Intangibles :
Total intangibles	853,045	349,718
Total goodwill and other intangibles assets	3,184,506	1,214,898
Accumulated amortization:
Total accumulated amortization	(239,036)	(206,294)
Goodwill and other intangible assets, net	2,945,470	1,008,604
Client lists
Intangibles :
Total intangibles	820,564	338,237
Accumulated amortization:
Total accumulated amortization	(227,943)	(196,412)
Other intangibles
Intangibles :
Total intangibles	32,481	11,481
Accumulated amortization:
Total accumulated amortization	$ (11,093)	$ (9,882)

FINANCIAL INSTRUMENTS - Additio

FINANCIAL INSTRUMENTS - Additional Information (Details) $ in Thousands	Dec. 31, 2024 USD ($) swap	Dec. 31, 2023 USD ($)
Debt Securities, Available-for-sale [Line Items]
Par value of available-for-sale debt securities	$ 41,300	$ 40,000
Funds held for clients	$ 175,853	159,186
Interest rate swaps
Debt Securities, Available-for-sale [Line Items]
Number of interest rate swaps held | swap	5
Certified deposits and other depository assets
Debt Securities, Available-for-sale [Line Items]
Funds held for clients	$ 200	$ 1,000

FINANCIAL INSTRUMENTS - Summary

FINANCIAL INSTRUMENTS - Summary of Investments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Debt Securities, Available for Sale [Roll Forward]
Fair value at beginning of period	$ 39,459	$ 43,485
Purchases	23,210	14,122
Redemptions	(500)	(3,310)
Maturities	(21,423)	(15,155)
Change in bond premium	(386)	(1,099)
Fair market value adjustment	639	1,416
Fair value at end of period	$ 40,999	$ 39,459

FINANCIAL INSTRUMENTS - Summa_2

FINANCIAL INSTRUMENTS - Summary of Outstanding Interest Rate Swaps (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Interest Rate Swap, April 2025 Expiration | Other current asset
Derivatives, Fair Value [Line Items]
Notional amount, asset	$ 50,000	$ 50,000
Interest rate swap, fixed interest rate	0.834%	0.834%
Fair value, asset	$ 495	$ 2,282
Interest Rate Swap, December 2026 Expiration | Other non-current asset
Derivatives, Fair Value [Line Items]
Notional amount, asset	$ 30,000	$ 30,000
Interest rate swap, fixed interest rate	1.186%	1.186%
Fair value, asset	$ 1,604	$ 2,125
Interest Rate Swap, August 2027 Expiration | Other non-current asset
Derivatives, Fair Value [Line Items]
Notional amount, asset	$ 20,000	$ 20,000
Interest rate swap, fixed interest rate	2.45%	2.45%
Fair value, asset	$ 776	$ 784
Interest Rate Swap, April 2028 Expiration | Other non-current asset
Derivatives, Fair Value [Line Items]
Notional amount, asset	$ 25,000
Interest rate swap, fixed interest rate	3.669%
Fair value, asset	$ 243
Interest Rate Swap, April 2028 Expiration | Other non-current liability
Derivatives, Fair Value [Line Items]
Notional amount, liability		$ 25,000
Interest rate swap, fixed interest rate		3.669%
Fair value, liability		$ (129)
Interest Rate Swap, October 2028 Expiration | Other non-current liability
Derivatives, Fair Value [Line Items]
Notional amount, liability	$ 25,000	$ 25,000
Interest rate swap, fixed interest rate	4.488%	4.488%
Fair value, liability	$ (437)	$ (1,063)

FINANCIAL INSTRUMENTS - Summa_3

FINANCIAL INSTRUMENTS - Summary of Effects of Interest Rate Swaps (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Derivatives, Fair Value [Line Items]
Gain recognized in AOCI, net of tax	$ (989)	$ (2,821)	$ 5,986
Interest rate swaps
Derivatives, Fair Value [Line Items]
Gain recognized in AOCI, net of tax	2,396	393
Interest rate swaps | Interest expense
Derivatives, Fair Value [Line Items]
Gain reclassified from AOCI into expense	$ 4,513	$ 4,285

FAIR VALUE MEASUREMENTS - Addit

FAIR VALUE MEASUREMENTS - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair value measurements, inter-transfers between levels	$ 0	$ 0
Increase (decrease) in the fair value of contingent consideration, net	6,993,000	2,743,000	$ 2,435,000
Other income (expense), net
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Increase (decrease) in the fair value of contingent consideration, net	$ (7,000,000)	$ (2,700,000)	$ (2,400,000)

FAIR VALUE MEASUREMENTS - Summa

FAIR VALUE MEASUREMENTS - Summary of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred compensation plan assets	$ 167,170	$ 143,499
Available-for-sale debt securities	40,999	39,459	$ 43,485
Deferred compensation plan liabilities	(167,170)	(143,499)
Bank debt	(20,900)	(312,400)
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred compensation plan assets	167,170	143,499
Available-for-sale debt securities	40,999	39,459
Other depository assets	176	1,031
Deferred compensation plan liabilities	(167,170)	(143,499)
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swaps, net	2,681	3,999
Bank debt	(1,399,932)	(310,826)
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent purchase price liabilities	$ (96,967)	$ (114,946)

FAIR VALUE MEASUREMENTS - Sum_2

FAIR VALUE MEASUREMENTS - Summary of Change in Level 3 Fair Values of Contingent Purchase Price Liabilities (Details) - Contingent Purchase Price Liabilities - Level 3 - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ (114,946)	$ (132,010)
Additions from business acquisitions	(40,034)	(32,142)
Settlement of contingent purchase price payable	65,007	51,949
Change in fair value of contingency	(4,710)	62
Change in net present value of contingency	(2,284)	(2,805)
Ending balance	$ (96,967)	$ (114,946)

INCOME TAXES - Summary of Incom

INCOME TAXES - Summary of Income Before Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
United States	$ 57,521	$ 165,869	$ 141,288
Foreign (Canada)	286	434	187
Income before income tax expense	$ 57,807	$ 166,303	$ 141,475

INCOME TAXES - Summary of Inc_2

INCOME TAXES - Summary of Income Tax Expense Included in Consolidated Statements of Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Current:
Federal	$ 23,362	$ 29,835	$ 20,910
Foreign	76	116	50
State and local	8,164	10,298	7,299
Total	31,602	40,249	28,259
Deferred:
Federal	(10,920)	3,978	5,667
State and local	(3,913)	1,108	2,195
Total	(14,833)	5,086	7,862
Total income tax expense	$ 16,769	$ 45,335	$ 36,121

INCOME TAXES - Summary of Provi

INCOME TAXES - Summary of Provision for Income Taxes Attributable to Income from Continuing Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Tax at U.S. federal statutory rates	$ 12,139	$ 34,924	$ 29,714
State taxes (net of federal benefit)	3,182	10,576	9,019
Reserves for uncertain tax positions	209	(241)	337
Share-based compensation	(3,907)	(5,820)	(6,832)
Meals and entertainment	1,193	1,168	337
Non-deductible officers' compensation	3,762	5,485	2,507
Other, net	191	(757)	1,039
Total income tax expense	$ 16,769	$ 45,335	$ 36,121
Effective income tax rate	29%	27.30%	25.50%

INCOME TAXES - Summary of Tax E

INCOME TAXES - Summary of Tax Effects of Temporary Differences That Rises to Significant Portions of Deferred Tax Assets and Deferred Tax Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Deferred tax assets:
Net operating loss carryforwards	$ 2,912	$ 1,515
Allowance for doubtful accounts	7,596	4,876
Employee benefits and compensation	45,122	38,137
Acquisition-related costs	9,110	0
Deferred revenue	4,446	0
Property and equipment	141	0
Lease liabilities	116,080	7,398
Other deferred tax assets	1,103	1,888
Total gross deferred tax assets	186,510	53,814
Less: valuation allowance	(2,941)	(2,721)
Total deferred tax assets, net	183,569	51,093
Deferred tax liabilities:
Goodwill and other intangibles	85,771	77,005
Right of Use assets	105,478	0
Property and equipment	0	836
Other deferred tax liabilities	3,200	2,539
Total gross deferred tax liabilities	194,449	80,380
Deferred income taxes, net	$ (10,880)	$ (29,287)

INCOME TAXES - Additional Infor

INCOME TAXES - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Income Tax Disclosure [Abstract]
Net increase in valuation allowance	$ 0.2
State net operating loss carryforwards	84.6
State tax credit carryforwards	0.1
Unrecognized tax benefits that would impact effective tax rate	1.3
Reductions in the liability for unrecognized tax benefits due to expiration of statues of limitation	0.2
Liability for interest expense	0.3	$ 0.3
Liability for penalties	$ 0.2	$ 0.2

INCOME TAXES - Summary of Recon

INCOME TAXES - Summary of Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Unrecognized Tax Benefits [Roll Forward]
Beginning Balance	$ 1,847	$ 2,111	$ 1,594
Additions for tax positions of the current year	197	178	175
Additions for positions of prior years	168	103	486
Lapse of statutes of limitation	(174)	(545)	(144)
Ending Balance	$ 2,038	$ 1,847	$ 2,111

DEBT AND FINANCING ARRANGEMEN_3

DEBT AND FINANCING ARRANGEMENTS - Additional Information (Details) - USD ($)		12 Months Ended
	Nov. 01, 2024	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Deferred financing costs		$ 20,654,000	$ 0	$ 2,072,000
Revolver Facility		20,900,000	312,400,000
Line of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		20,000,000
Total short-term debt		0	0
2024 Credit Facilities | Line of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 2,000,000,000
Annual amortization rate first two years	5%
Annual amortization rate third and fourth years	7.50%
Annual amortization rate, year five	10%
Covenant leverage ratio, maximum, tranche one	5
Covenant leverage ratio, maximum, tranche two	3.75
Covenant interest coverage ratio, minimum	3
Deferred financing costs		20,700,000
Long-term line of credit	$ 1,420,000,000
Available funds under credit facility		556,000,000
2024 Credit Facilities | Line of Credit | Fed Funds Effective Rate Overnight Index Swap Rate
Debt Instrument [Line Items]
Basis spread on variable rate	0.50%
2024 Credit Facilities | Line of Credit | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Basis spread on variable rate	1%
2024 Credit Facilities | Line of Credit | SOFR Adjustment
Debt Instrument [Line Items]
Basis spread on variable rate	0.10%
2024 Credit Facilities | Line of Credit | Adjusted Base Rate | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	0.375%
2024 Credit Facilities | Line of Credit | Adjusted Base Rate | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate	1.50%
2024 Credit Facilities | Line of Credit | Adjusted Term Secured Overnight Financing Rate (SOFR) | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	1.375%
2024 Credit Facilities | Line of Credit | Adjusted Term Secured Overnight Financing Rate (SOFR) | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate	2.50%
2024 Credit Facilities | Line of Credit | Secured Debt
Debt Instrument [Line Items]
Debt instrument, face amount	$ 1,400,000,000
Long-term line of credit		$ 1,400,000,000
2024 Credit Facilities | Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	600,000,000
Incremental borrowing capacity	$ 465,000,000
Percent of EBITDA	100%
Net leverage ratio	3.50
Long-term line of credit	$ 20,900,000
2022 Credit Facility | Line of Credit
Debt Instrument [Line Items]
Revolver Facility			$ 312,400,000

DEBT AND FINANCING ARRANGEMEN_4

DEBT AND FINANCING ARRANGEMENTS - Summary of Unsecured Credit Facility (Details) - Line of Credit	Dec. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Weighted average blended interest rate	6%	5.23%
Minimum
Debt Instrument [Line Items]
Range of blended interest rates	1.93%	1.93%
Maximum
Debt Instrument [Line Items]
Range of blended interest rates	6.84%	8%

DEBT AND FINANCING ARRANGEMEN_5

DEBT AND FINANCING ARRANGEMENTS - Summary of Recognized Interest Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Total	$ 34,379	$ 20,131	$ 8,039
Credit facilities
Debt Instrument [Line Items]
Total	34,376	20,093	8,033
Other line of credit
Debt Instrument [Line Items]
Total	0	1	6
Other
Debt Instrument [Line Items]
Total	$ 3	$ 37	$ 0

ACCUMULATED OTHER COMPREHENSI_3

ACCUMULATED OTHER COMPREHENSIVE INCOME (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Equity [Abstract]
Unrealized (loss) gain on available for sale securities, income tax (benefit) expense	$ 14	$ (168)
Unrealized loss on interest rate swaps, income tax expense (benefit)	685	972
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total stockholders' equity	1,779,983	791,618	$ 713,452	$ 704,548
Accumulated Other Comprehensive (Loss) Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total stockholders' equity	1,219	1,778	$ 3,604	$ (967)
Net unrealized loss of available-for-sale securities, net of income tax expense of $14 and income tax benefit of $168, respectively
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total stockholders' equity	(48)	(505)
Net unrealized gain on interest rate swap, net of income tax expense of $685 and $972, respectively
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total stockholders' equity	2,075	3,064
Foreign currency translation
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total stockholders' equity	$ (808)	$ (781)

COMMITMENTS AND CONTINGENCIES -

COMMITMENTS AND CONTINGENCIES - Acquisitions (Details)	12 Months Ended
	Dec. 31, 2024
Commitments and Contingencies Disclosure [Abstract]
Period of time shares are contractually restricted from sale (up to)	1 year

COMMITMENTS AND CONTINGENCIES_2

COMMITMENTS AND CONTINGENCIES - Letters of Credit and Guarantees (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Commitments and Contingencies Disclosure [Abstract]
Letters of credit outstanding	$ 3.2	$ 3.5
License bonds outstanding amount	$ 2.2	$ 2.3

COMMITMENTS AND CONTINGENCIES_3

COMMITMENTS AND CONTINGENCIES - Legal Proceedings (Details) $ in Millions			12 Months Ended
	Mar. 12, 2024 USD ($)	Dec. 19, 2016 USD ($)	Dec. 31, 2024 defendant claim
CBIZ Operations and former employee of CBIZ MMP
Commitments And Contingencies [Line Items]
Total transaction price		$ 200
Loss contingency, amount of damages awarded	$ 3.1
CBIZ Operations and former employee of CBIZ MMP | Maximum
Commitments And Contingencies [Line Items]
Amount of damages sought (up to)		$ 177
MOVEit Customer Data Security Breach Litigation
Commitments And Contingencies [Line Items]
Number of claims filed | claim			180
Number of defendants | defendant			100

EMPLOYEE BENEFITS (Details)

EMPLOYEE BENEFITS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Retirement Benefits [Abstract]
Maximum percentage of a participant's eligible compensation that a participating may elect to contribute, on a tax-deferred annually to the plan (as a percent)	80%
Percentage of matching contribution made by company, of first 6.0% of participating employees contributions (as a percent)	50%
Percentage of participating employees contribution, matched 100% (as a percent)	6%
Employer contribution	$ 22,900	$ 18,500	$ 16,100
Non-qualified deferred income (loss) on investment	21,100	19,500	$ (19,600)
Non-qualified deferred compensation plan assets	167,170	143,499
Non-qualified deferred compensation plan liabilities	$ 167,170	$ 143,499

COMMON STOCK (Details)

COMMON STOCK (Details)			12 Months Ended
	Feb. 03, 2025 shares	Jan. 02, 2025 shares	Dec. 31, 2024 USD ($) shares	Dec. 31, 2023 USD ($) shares	Dec. 31, 2022 USD ($)	Feb. 27, 2025 installment shares
Schedule Of Common Stock [Line Items]
Senior leverage ratio			3
Adjusted total leverage ratio spread			25%
Pro forma EBITDA threshold (as a percent)			10%
Cost of shares repurchased | $				$ 65,142,000	$ 122,773,000
Indirect repurchase of shares for minimum tax withholding (in shares) | shares			200,000	200,000
Indirect repurchase of shares for minimum tax withholding | $			$ 11,508,000	$ 8,448,000	$ 7,289,000
Marcum LLP | Subsequent Event
Schedule Of Common Stock [Line Items]
Shares issued during period for acquisitions (in shares) | shares	300,000	3,100,000
Remaining number of shares issuable (in shares) | shares						10,200,000
Number of monthly installments for remaining shares issuable | installment						34
Share Repurchase Program
Schedule Of Common Stock [Line Items]
Shares repurchased to settle statutory employee withholding related to vesting of stock awards (in shares) | shares			0	1,300,000
Cost of shares repurchased | $				$ 65,100,000
Maximum
Schedule Of Common Stock [Line Items]
Annual share repurchase limit | $			$ 50,000,000

EMPLOYEE STOCK PLANS - Addition

EMPLOYEE STOCK PLANS - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	May 10, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Price an employee pays for shares as percentage of fair market value	85%
Holding period of stock	1 year
Granted (in shares)	0
Stock options exercised (in shares)	0
Stock options outstanding (in shares)	150,000
weighted average exercise price (in dollars per share)	$ 35.22
Restricted stock units and awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost for restricted stock awards	$ 53,600,000
Compensation cost for non-vested stock options weighted average period	3 years 2 months 12 days
Total fair value of shares vested during period	$ 5,100,000	$ 5,100,000	$ 5,600,000
Market value of shares awarded during period	$ 56,200,000	$ 5,300,000	$ 5,000,000
Performance share units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares vesting term	3 years
Share-based compensation arrangement by share-based payment award, remaining contractual terms	3 years
Achievement of an earnings per share target	70%
Achievement of total growth in revenue	30%
2019 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Additional shares authorized for issuance (in shares)				1,500,000
Share available for future grant (in shares)	2,000,000			4,600,000
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
ESPP allows qualified employees to purchase shares of common stock	$ 25,000
Shares purchased under ESPP	2,000,000
Shares vesting term	4 years
Maximum | Restricted stock units and awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares vesting term	4 years
Maximum | Performance share units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of initial grant	200%
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares vesting term	3 years
Minimum | Restricted stock units and awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares vesting term	1 year

EMPLOYEE STOCK PLANS - Summary

EMPLOYEE STOCK PLANS - Summary of Share-Based Compensation Awards (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Share-Based Payment Arrangement [Abstract]
Stock options	$ 0	$ 768	$ 248
Restricted stock units and awards	7,771	5,258	5,204
Performance share units	6,065	6,260	9,237
Total share-based compensation expense	$ 13,836	$ 12,286	$ 14,689

EMPLOYEE STOCK PLANS - Summar_2

EMPLOYEE STOCK PLANS - Summary of Restricted Stock Award Activity (Details) shares in Thousands	12 Months Ended
	Dec. 31, 2024 $ / shares shares
Marcum LLP
Number of Shares
Granted (in shares)	713
Restricted stock units and awards
Number of Shares
Outstanding at beginning of period (in shares)	223
Granted (in shares)	810
Vested (in shares)	(131)
Forfeited (in shares)	(3)
Outstanding at end of period (in shares)	899
Weighted Average Grant Date Fair Value
Outstanding at beginning of period (in dollars per share) | $ / shares	$ 41.19
Granted (in dollars per share) | $ / shares	69.46
Vested (in dollars per share) | $ / shares	38.76
Forfeited (in dollars per share) | $ / shares	38.52
Outstanding at end of period (in dollars per share) | $ / shares	$ 67.01

EMPLOYEE STOCK PLANS - Summar_3

EMPLOYEE STOCK PLANS - Summary of PSU Award Activity (Details) - Performance share units shares in Thousands	12 Months Ended
	Dec. 31, 2024 $ / shares shares
Performance Share Units
Outstanding at beginning of period (in shares) | shares	464
Granted (in shares) | shares	70
Vested (in shares) | shares	(273)
Adjustments for performance results (in shares) | shares	31
Forfeited (in shares) | shares	(7)
Outstanding at end of period (in shares) | shares	285
Weighted Average Grant Date Fair Value Per Unit
Outstanding at beginning of period (in dollars per share) | $ / shares	$ 33.84
Granted (in dollars per share) | $ / shares	66.07
Vested (in dollars per share) | $ / shares	27.51
Adjustments for performance results (in dollars per share) | $ / shares	38.12
Forfeited (in dollars per share) | $ / shares	39.09
Outstanding at end of period (in dollars per share) | $ / shares	$ 48.18

EARNINGS PER SHARE (Details)

EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Numerator:
Net income	$ 41,038	$ 120,968	$ 105,354
Basic
Weighted average common shares outstanding (in shares)	52,375	49,989	51,502
Diluted
Stock options (in shares)	78	172	487
Restricted stock awards (in shares)	78	98	141
Contingent shares (in shares)	3	21	14
Performance share units (in shares)	127	277	244
Diluted weighted average common shares outstanding (in shares)	52,661	50,557	52,388
Basic earnings per share (in dollars per share)	$ 0.78	$ 2.42	$ 2.05
Diluted earnings per share (in dollars per share)	$ 0.78	$ 2.39	$ 2.01
Share-based Payment Arrangement
Dilutive Securities Included And Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Share based awards excluded from the calculation of diluted earnings per share (in shares)	173	58	68
Performance share units
Dilutive Securities Included And Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Share based awards excluded from the calculation of diluted earnings per share (in shares)	200	200	200

LEASES - Summary of Balance She

LEASES - Summary of Balance Sheet Information Related to Leases (Details)	Dec. 31, 2024	Dec. 31, 2023
Leases [Abstract]
Weighted-average remaining lease term	7 years 6 months	7 years 3 months 18 days
Weighted-average discount rate	5.91%	5.51%

LEASES - Summary of Lease Cost

LEASES - Summary of Lease Cost and Other Lease Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Leases [Abstract]
Operating lease cost	$ 51,783	$ 45,088
Cash paid for amounts included in measurement of lease liabilities
Operating cash flows for operating leases	$ 52,483	$ 46,936

LEASES - Additional Information

LEASES - Additional Information (Details)	Dec. 31, 2024
Minimum
Lessee, Lease, Description [Line Items]
Operating lease, remaining lease term	1 year
Operating lease, renewal term	2 years
Maximum
Lessee, Lease, Description [Line Items]
Operating lease, remaining lease term	19 years
Operating lease, renewal term	5 years

LEASES - Summary of Maturity of

LEASES - Summary of Maturity of Operating Lease Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Leases [Abstract]
Year One	$ 84,270	$ 47,446
Year Two	83,995	46,623
Year Three	80,062	43,131
Year Four	63,907	40,678
Year Five	55,120	29,261
Thereafter	178,389	90,535
Total undiscounted lease payments	545,743	297,674
Less: imputed interest	(112,608)	(57,486)
Total lease liabilities	$ 433,135	$ 240,188

RELATED PARTIES (Details)

RELATED PARTIES (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Related Party Transaction [Line Items]
Operating cash flows for operating leases	$ 52,483	$ 46,936
Related Party
Related Party Transaction [Line Items]
Operating cash flows for operating leases	$ 1,600	$ 1,200	$ 1,900

SEGMENT DISCLOSURES - Additiona

SEGMENT DISCLOSURES - Additional Information (Details)	12 Months Ended
	Dec. 31, 2024 segment
Segment Reporting [Abstract]
Number of business units of the company	3

SEGMENT DISCLOSURES - Schedule

SEGMENT DISCLOSURES - Schedule of Revenue from External Customers (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 1,813,472	$ 1,591,194	$ 1,411,979
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	1,811,113	1,589,478	1,410,255
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 2,359	$ 1,716	$ 1,724

SEGMENT DISCLOSURES - Schedul_2

SEGMENT DISCLOSURES - Schedule of Segment Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Revenue	$ 1,813,472	$ 1,591,194	$ 1,411,979
Corporate & other:
General & administrative expenses	108,753	57,965	55,023
Interest expense	34,379	20,131	8,039
Other income (expense), net	(13,538)	(21,019)	19,243
Income before income tax expense	57,807	166,303	141,475
Financial Services
Segment Reporting Information [Line Items]
Revenue	1,362,539	1,160,686	1,010,068
Benefits and Insurance Services
Segment Reporting Information [Line Items]
Revenue	401,048	382,605	358,007
National Practices
Segment Reporting Information [Line Items]
Revenue	49,885	47,903	43,904
Operating Segments
Segment Reporting Information [Line Items]
Revenue	1,813,472	1,591,194	1,411,979
Personnel costs	1,272,809	1,077,080	951,258
Facility costs	67,836	56,890	55,698
Other costs, gains, and losses, net	240,173	190,399	169,592
Total segment expense	1,580,818	1,324,369	1,176,548
Corporate & other:
Income before income tax expense	232,654	266,825	235,431
Operating Segments | Financial Services
Segment Reporting Information [Line Items]
Revenue	1,362,539	1,160,686	1,010,068
Personnel costs	972,730	793,791	688,555
Facility costs	55,178	44,444	42,617
Other costs, gains, and losses, net	185,091	134,623	118,184
Total segment expense	1,212,999	972,858	849,356
Corporate & other:
Income before income tax expense	149,540	187,828	160,712
Operating Segments | Benefits and Insurance Services
Segment Reporting Information [Line Items]
Revenue	401,048	382,605	358,007
Personnel costs	257,166	242,340	225,871
Facility costs	12,481	12,196	12,831
Other costs, gains, and losses, net	58,476	53,916	49,299
Total segment expense	328,123	308,452	288,001
Corporate & other:
Income before income tax expense	72,925	74,153	70,006
Operating Segments | National Practices
Segment Reporting Information [Line Items]
Revenue	49,885	47,903	43,904
Personnel costs	42,913	40,949	36,832
Facility costs	177	250	250
Other costs, gains, and losses, net	(3,394)	1,860	2,109
Total segment expense	39,696	43,059	39,191
Corporate & other:
Income before income tax expense	10,189	4,844	4,713
Corporate And Eliminations
Corporate & other:
Unallocated corporate operating expenses	44,485	39,344	8,986
General & administrative expenses	108,753	57,965	55,023
Interest expense	34,374	20,129	8,033
Other income (expense), net	$ (12,765)	$ (16,916)	$ 21,914

SUBSEQUENT EVENTS (Details)

SUBSEQUENT EVENTS (Details) - Subsequent Event	Feb. 11, 2025 shares
Subsequent Event [Line Items]
Stock repurchase program duration	20 years
Stock repurchase program authorized to be repurchased (in shares)	5,000,000
Renewal period of share repurchase	1 year