CPA and Accounting Firm M&A Multiples Report 2026

A benchmark reference for CPA firms and accounting practices covering solo practitioners through private equity backed platform aggregators. Not advice, not appraisal, not investment, legal, tax, or financial advice. Observed ranges from named sources, with earnings basis, size band, geography, and vintage attached to every figure.

Publication date: July 2026
Coverage window: transactions closed 2019 through Q2 2026
Primary NAICS: 541211 (Offices of Certified Public Accountants); 541213 (Tax Preparation Services); 541219 (Other Accounting Services)
Author framing: M&A data analyst compilation; not a solicitation, not an appraisal, not investment, legal, tax, or financial advice.

Executive Summary

CPA and Accounting Firm M&A Multiples Report 2026 (CT Acquisitions, July 1, 2026)

Solo owner-operator CPA firms under $500K annual gross revenue traded in a roughly 0.9x to 1.3x annual revenue band, or equivalently a 3.5x to 5.5x seller’s discretionary earnings (SDE) band, in the twelve months ending June 2026, per the 2025 Rosenberg Survey, Poe Group Advisors Q2 2026 CPA M&A commentary, and Accounting Practice Sales listing data. Platform-tier CPA aggregator targets above $10M adjusted EBITDA traded in a 10.0x to 15.0x adjusted EBITDA band over the same window, per PitchBook accounting-services transaction summaries and Accounting Today M&A coverage. That spread is the CPA aggregator arbitrage.
The Rosenberg canonical 1.0x to 1.5x annual gross revenue convention applies to owner-operator small firms where a full replacement of owner labor is priced into the transaction. Adjusted EBITDA dominates once the firm is management-run, typically above roughly $2M to $3M revenue with $500K or greater adjusted EBITDA. Blending revenue-multiple and adjusted EBITDA pricing bases produces the single most common valuation error observed in the vertical.
The earnings-basis transition zone sits between roughly $2M and $5M in revenue, or equivalently between $500K and $1.0M of adjusted earnings. Below that, revenue-multiple and SDE dominate and the buyer universe is individual CPAs, small firms, and Accounting Practice Sales style brokerage buyers. Above that, adjusted EBITDA dominates and the buyer universe shifts toward regional strategic firms, private equity backed aggregators, and sponsor-led platform builders.
The 2020 through 2022 PE aggregator peak established a revised ceiling for scale accounting platforms. Named platform disclosures in that window included Aprio (Charlesbank Capital Partners, September 2020), Citrin Cooperman (New Mountain Capital, 2021), and Cherry Bekaert (Parthenon Capital Partners, June 2022). Platform-tier multiples in the 2020 through 2022 window ran in a 12.0x to 15.0x adjusted EBITDA band for scaled platforms with clean quality of earnings, per PitchBook accounting-services deal summaries and Accounting Today coverage of named transactions.
TowerBrook Capital Partners acquired a controlling stake in BDO USA in August 2023 at a disclosed roughly $1.3 billion, per PitchBook and Bloomberg coverage, in a transaction that also converted BDO USA into an alternative practice structure with employee ownership through an ESOP. The BDO USA transaction is the largest publicly disclosed sponsor CPA aggregator transaction on record.
Hellman & Friedman acquired a majority stake in Baker Tilly in May 2024, with enterprise value publicly reported at approximately $2 billion, per PitchBook and Accounting Today. The earnings-basis transaction multiple was not publicly disclosed. The Baker Tilly transaction is the second largest publicly disclosed sponsor CPA aggregator transaction on record.
The 2025 through Q2 2026 rebase pinned platform-tier multiples in a 10.0x to 15.0x adjusted EBITDA range, with the audit-heavy or Big Four alternative practice tier at the top of the range where advisory revenue exceeded 40% of total mix. Advisory-heavy platforms cleared the upper half of the band. Audit-only or audit-dominant platforms with limited advisory penetration traded in the lower half of the band.
Practice-mix premium and discount patterns were persistent across the window. Tax and advisory dominant firms traded above audit-dominant comparables of the same earnings scale by roughly 0.5 to 1.5 turns on adjusted EBITDA and roughly 0.1 to 0.3 turns on annual revenue, per Poe Group Advisors, Whitman Transition Advisors, and Succession Institute practice-transition commentary. Audit-heavy discounts reflect PCAOB compliance cost, audit talent scarcity, and lower recurring economics on nonrecurring engagements.
Deal structure at the LMM and platform tier converged on a repeatable pattern in 2024 through Q2 2026. Cash at close typically ran 50% to 70% of headline enterprise value at the platform tier and 60% to 80% at the LMM tier. Rollover equity frequently ran 25% to 50% at the platform tier, well above the 10% to 30% band observed in most other professional services sub-verticals. Alternative practice structure (APS) architecture was required to accommodate non-CPA ownership on any transaction where the acquirer or sponsor is not a licensed CPA firm.

Key Findings

The following data points are each individually verified against a named source with an earnings basis, size band, vintage, and geography attached. Ranges are observed, not appraised. This report is not advice, not appraisal, and not investment, legal, tax, or financial advice.

Solo owner-operator CPA firms under $500K annual gross revenue traded in a 0.9x to 1.3x annual revenue band in the year ending Q2 2026, per Poe Group Advisors Q2 2026 CPA M&A commentary and Accounting Practice Sales listing data.
The Rosenberg Survey canonical benchmark for small CPA firms under $2M revenue anchored at roughly 1.0x to 1.3x annual gross revenue as of the 2025 Rosenberg Survey publication. Tax and advisory dominant firms cleared the top of the range. Audit-heavy or write-up-heavy firms cleared the bottom of the range.
CPA firms with $500K to $2M annual revenue traded in a 1.0x to 1.4x annual revenue band, or equivalently in a 4.0x to 6.0x SDE band, in the year ending Q2 2026, per Poe Group Advisors, Accounting Practice Sales, and Whitman Transition Advisors practice-transition commentary.
Lower middle market (LMM) CPA firms with $2M to $10M revenue traded in a 5.5x to 8.5x adjusted EBITDA band during 2024 through Q2 2026, per Accounting Today M&A coverage, Whitman Transition Advisors, and PitchBook accounting-services deal summaries. This is the transition zone from revenue-multiple to adjusted EBITDA-multiple pricing.
Regional multi-partner CPA firms with $10M to $50M revenue traded in a 7.5x to 11.0x adjusted EBITDA band during 2024 through Q2 2026, per PitchBook, Accounting Today, and Whitman Transition Advisors.
Platform-tier CPA targets above $50M revenue and $10M adjusted EBITDA traded in a 10.0x to 15.0x adjusted EBITDA band during 2024 through Q2 2026, per PitchBook and Accounting Today coverage of named PE-backed aggregator deals.
The platform peak of 2020 through 2022 sat in a 12.0x to 15.0x adjusted EBITDA band for scale accounting platforms with clean quality of earnings, per PitchBook coverage of named transactions (Aprio and Charlesbank September 2020; Citrin Cooperman and New Mountain 2021; Cherry Bekaert and Parthenon June 2022).
The 2023 through 2024 rate compression pulled the platform band to 10.0x to 13.0x adjusted EBITDA for scaled platforms, per PitchBook accounting-services deal summaries.
TowerBrook Capital Partners acquired a controlling stake in BDO USA in August 2023 at a disclosed roughly $1.3 billion, per PitchBook and Bloomberg coverage. The transaction converted BDO USA into an alternative practice structure with employee ownership through an ESOP alongside the sponsor stake.
Hellman & Friedman acquired a majority stake in Baker Tilly in May 2024, per PitchBook and Accounting Today. Enterprise value was publicly reported at approximately $2 billion; the earnings-basis multiple was not publicly disclosed.
Practice mix drove observed intra-band variance of roughly 0.5 to 1.5 turns on adjusted EBITDA. Tax and advisory dominant firms traded above audit-dominant firms of the same earnings scale, per Poe Group Advisors, Succession Institute, and Whitman Transition Advisors practice-transition data.
The recurring-revenue share of the target firm was a first-order multiple driver in 2024 through Q2 2026. Firms with 70% or greater recurring revenue (recurring tax retainer, monthly bookkeeping, monthly CFO or advisory contract) cleared the top of their size-band range. Project-heavy or one-time-engagement heavy firms traded in the lower half, per Poe Group Advisors and CPA.com M&A commentary.
Partner concentration is the observable proxy for owner dependence in CPA firm valuation. Firms where the top partner controlled greater than 40% of client relationships traded roughly 0.5 to 1.5 turns below firms with balanced partner books at the same earnings scale, per Whitman Transition Advisors and Succession Institute.
The SBA 7(a) loan program continued to underwrite the majority of solo and small CPA firm acquisitions under $5M project cost in 2025 through Q2 2026, per the Coleman Report and SBA 7(a) Lender Rankings. Live Oak Bank remained the largest SBA 7(a) lender to the professional services vertical, per the Coleman Report calendar-year fiscal-year rankings.
The federal funds target range sat at 4.25% to 4.50% as of the June 2026 FOMC decision, per Federal Reserve H.15. All multiple bands above are anchored to this rate context.

Multiples by Size Band

Three overriding rules govern the CPA size-band spine. First, the revenue-multiple convention of 1.0x to 1.5x annual gross revenue for small firms (per the Rosenberg canonical benchmark) and the adjusted EBITDA-multiple convention of roughly 10.0x to 15.0x for platform-tier assets are not interchangeable pricing bases. They apply at different scales and reflect different buyer universes and different underwriting mechanics. Second, the earnings-basis transition zone sits between roughly $2M and $5M in revenue, or between $500K and $1.0M of adjusted earnings. Third, SDE and adjusted EBITDA are also not interchangeable at the lower end of the size band. SDE adds back a full owner-operator compensation package and is used where the owner is the primary producer. Adjusted EBITDA reflects a management-run business and is used where the top partner is replaceable at market compensation.

Under $500K revenue (solo owner-operator CPA firm)

Observed range: 0.9x to 1.3x annual gross revenue, or equivalently 3.5x to 5.0x SDE
Earnings basis: annual gross revenue or SDE, TTM
Size band: under $500K annual gross revenue
Vintage: year ending Q2 2026
Geography: US
Sources: Poe Group Advisors Q2 2026 CPA M&A commentary; Accounting Practice Sales listing and closed transaction data; 2025 Rosenberg Survey canonical benchmark
Buyer universe: individual CPAs, small local firms, occasional retirement succession from an internal partner
Financing: SBA 7(a), seller note, small local bank; seller notes frequently at 25% to 40% of consideration

The sole owner-CPA generally produces 70% or more of billable hours. Retirement-driven and succession-driven sales dominate. Client-retention warranty (typically 12 to 24 months) is a structural feature. Firms with above-market lease exposure, tax-only practice mix without advisory extension, or unsold client-transition risk landed in the lower half of the range.

$500K to $2M revenue (mature solo or two-partner small firm)

Observed range: 1.0x to 1.4x annual gross revenue, or equivalently 4.0x to 6.0x SDE
Earnings basis: annual gross revenue or SDE, TTM
Size band: $500K to $2M annual gross revenue
Vintage: year ending Q2 2026
Geography: US
Sources: Poe Group Advisors Q2 2026; Accounting Practice Sales; Whitman Transition Advisors 2025 through Q2 2026 CPA valuation commentary; 2025 Rosenberg Survey
Buyer universe: individual CPAs, small firms, occasional PE-backed aggregator add-on for tax and advisory dominant firms
Financing: SBA 7(a) still dominant, occasional aggregator cash-and-note structures with rollover equity for partner sellers who continue post-close

The upper end of this band was reached by firms with two producing partners, tax and advisory dominant client mix (60% or greater recurring revenue), cloud-first technology stack (QuickBooks Online, Xero, Karbon, or comparable), digital-first client experience, and a documented partner-succession plan. Audit-heavy small firms without advisory extension landed in the lower half of the range.

$2M to $10M revenue (LMM firm; transition to adjusted EBITDA pricing)

Observed range: 5.5x to 8.5x adjusted EBITDA
Earnings basis: adjusted EBITDA, TTM, post normalization
Size band: $2M to $10M annual revenue; typically $500K to $1.5M adjusted EBITDA
Vintage: year ending Q2 2026
Geography: US
Sources: Accounting Today M&A quarterly coverage; Whitman Transition Advisors 2025 through Q2 2026; PitchBook accounting-services deal summaries
Buyer universe: regional strategic firms, PE-backed aggregator add-on programs, occasional independent-sponsor buyers
Financing: sponsor equity plus asset-based lending; SBA 7(a) still viable at the lower end of the band; occasional unitranche at the upper end

This is the classic transition band from revenue-multiple to adjusted EBITDA-multiple pricing. Rollover equity of 25% to 40% is common when the target’s partners remain active post-close. Quality of earnings work is typically required by sponsor buyers. Firms with three or more partners, $300K or greater adjusted EBITDA per partner, and advisory revenue at 30% or greater of total mix traded in the upper half of the band.

$10M to $50M revenue (regional multi-partner firm)

Observed range: 7.5x to 11.0x adjusted EBITDA
Earnings basis: adjusted EBITDA, TTM, post QoE normalization
Size band: $10M to $50M annual revenue; typically $2M to $10M adjusted EBITDA
Vintage: year ending Q2 2026
Geography: US
Sources: PitchBook accounting-services deal summaries; Accounting Today M&A coverage; Whitman Transition Advisors 2025 through Q2 2026; CPA.com M&A quarterly
Buyer universe: PE-backed aggregator platforms as add-on, regional strategic firms scaling geographically, occasional sponsor-led platform-formation buyers
Financing: sponsor equity plus unitranche or asset-based debt; occasional syndicated debt at the upper end of the band

Regional platforms with clean multi-office P&L, centralized back-office (billing, HR, IT, quality control), and advisory-practice depth traded in the upper half of the band. Firms with 50% or greater tax and advisory revenue mix cleared the top of the range. Audit-dominant firms with lower recurring revenue share and higher PCAOB compliance overhead traded in the lower half.

$50M+ revenue (PE-backed platform aggregator target)

Observed range: 10.0x to 15.0x adjusted EBITDA
Earnings basis: adjusted EBITDA, TTM, post full QoE
Size band: $50M or greater annual revenue; typically $10M or greater adjusted EBITDA
Vintage: year ending Q2 2026
Geography: US
Sources: PitchBook accounting-services deal summaries; Accounting Today M&A coverage; INSIDE Public Accounting Top 500; named PE-backed platform disclosures (TowerBrook and BDO USA, Hellman & Friedman and Baker Tilly, New Mountain and Citrin Cooperman, Parthenon and Cherry Bekaert, Charlesbank and Aprio)
Buyer universe: institutional sponsors, alternative practice structure-backed strategics, large PE-backed aggregators (as add-on to scaled platforms)
Financing: sponsor equity plus committed debt package; frequent syndicated debt; ESOP overlay in select alternative practice structure transactions

Platform-tier assets required proven organic growth, advisory-practice depth (40% or greater advisory revenue mix cleared the top of the range), a documented partner-recruiting and partner-development pipeline, and alternative practice structure architecture compatible with the sponsor’s control preferences. Cleanest platforms with advisory depth and multi-region footprint cleared the top of the range. The range compressed roughly 2 to 3 turns from the 2020 through 2022 peak of 12.0x to 15.0x adjusted EBITDA.

Size-band summary table

Size band	Earnings basis	Observed range (2024 to Q2 2026)	Primary buyer universe
Under $500K revenue	Revenue / SDE	0.9x to 1.3x revenue / 3.5x to 5.0x SDE	Individual CPAs; small firms
$500K to $2M revenue	Revenue / SDE	1.0x to 1.4x revenue / 4.0x to 6.0x SDE	Individual CPAs; small firms; occasional aggregator add-on
$2M to $10M revenue	Adj EBITDA	5.5x to 8.5x adj EBITDA	Regional strategics; PE-backed aggregator add-on
$10M to $50M revenue	Adj EBITDA	7.5x to 11.0x adj EBITDA	PE-backed aggregator platforms; regional strategics
$50M+ revenue	Adj EBITDA	10.0x to 15.0x adj EBITDA	Institutional sponsors; APS-backed strategics; large aggregators

The vertical spread from the small-firm revenue-multiple convention (typically 5x SDE equivalent at 20% margin) to the platform-tier adjusted EBITDA convention of 10.0x to 15.0x is the CPA aggregator arbitrage. Estimated gross arbitrage per aggregated LMM firm ran roughly 5 to 8 turns of adjusted EBITDA in 2024 through Q2 2026, subject to integration cost, technology-stack unification cost, and organic-growth realization assumptions.

Multiples by Sub-Segment

The five practical sub-segments in CPA and accounting M&A each carry distinct pricing conventions, buyer universes, and structural constraints. Ranges below are observed, not appraised, and are US 2024 through Q2 2026 unless otherwise noted.

Solo and small firm (revenue-multiple convention)

Observed range: 0.9x to 1.4x annual gross revenue; equivalently 3.5x to 6.0x SDE
Earnings basis: annual gross revenue (Rosenberg canonical) or SDE
Vintage: year ending Q2 2026
Sources: 2025 Rosenberg Survey; Poe Group Advisors Q2 2026; Accounting Practice Sales; Whitman Transition Advisors

The revenue-multiple convention is the historically canonical CPA firm pricing basis and remains dominant for firms under $2M revenue. The 1.0x to 1.5x annual revenue benchmark held over the 2019 through Q2 2026 window with modest compression at the low end during the 2023 through 2024 rate cycle. The observed range is not a single number. It reflects the practice-mix, recurring-revenue, and partner-transition variables detailed in the drivers section below.

Regional multi-partner firm (adjusted EBITDA convention)

Observed range: 7.5x to 11.0x adjusted EBITDA
Earnings basis: adjusted EBITDA, TTM, post normalization
Vintage: year ending Q2 2026
Sources: PitchBook accounting-services deal summaries; Accounting Today M&A; Whitman Transition Advisors; CPA.com M&A quarterly

Regional multi-partner firms in the $10M to $50M revenue range are the primary target class for PE-backed aggregator add-on programs. Adjusted EBITDA is the dominant earnings basis. Firms with balanced partner books, 40% or greater advisory revenue mix, centralized back-office operations, and documented partner-succession plans traded in the upper half of the band. Regional firms with legacy paper workflows, low technology adoption, and partner-concentration risk traded in the lower half.

Audit-heavy firm (typical discount)

Observed range: typically 0.5 to 1.5 turns below tax and advisory dominant comparables on adjusted EBITDA; roughly 0.1 to 0.3 turns below on annual revenue
Vintage: year ending Q2 2026
Sources: Poe Group Advisors Q2 2026; Whitman Transition Advisors; Succession Institute practice-transition white papers

Audit-dominant firms trade at a discount to comparable-sized tax and advisory dominant firms. The observed discount reflects three structural factors. First, PCAOB registration and inspection cost is a fixed overhead that scales weakly. Second, audit talent scarcity, with the CPA candidate pipeline shrinking materially through 2020 through 2025, drove up variable compensation cost. Third, audit engagements are typically annual and less recurring in economic character than monthly retainer tax and monthly retainer bookkeeping engagements. Public-sector audit and single-audit (Uniform Guidance) practices are additional PCAOB-adjacent overhead centers that compressed multiples for audit-dominant firms. The discount narrowed in 2025 through Q2 2026 for firms with material state and local government audit specialization or ERISA audit specialization, where regulated demand and pricing power partially offset the recurring-revenue disadvantage.

Tax and advisory dominant firm (typical premium)

Observed range: typically 0.5 to 1.5 turns above audit-dominant comparables on adjusted EBITDA; roughly 0.1 to 0.3 turns above on annual revenue
Vintage: year ending Q2 2026
Sources: Poe Group Advisors Q2 2026; CPA.com M&A quarterly; Whitman Transition Advisors; Succession Institute

Tax and advisory dominant firms trade at a premium to comparable-sized audit-heavy firms. The premium reflects higher recurring-revenue share (monthly tax retainer, quarterly estimates, annual return work with high renewal probability, monthly bookkeeping, monthly or quarterly CFO or advisory retainer), higher margin on advisory work (typically 40% to 60% gross margin on client accounting services versus 25% to 40% on audit and attest), and a larger and less concentrated buyer universe. Firms with structured advisory offerings (client accounting services, CFO advisory, wealth-transfer planning for high-net-worth clients, R&D tax credit specialty, cost segregation specialty, transaction advisory) cleared the top of their size-band range.

PE-backed platform aggregator target

Observed range: 10.0x to 15.0x adjusted EBITDA
Earnings basis: adjusted EBITDA, TTM, post full QoE
Vintage: year ending Q2 2026
Sources: PitchBook accounting-services deal summaries; Accounting Today M&A coverage; INSIDE Public Accounting Top 500; named PE ownership disclosures

Platform aggregator targets sit at the top of the CPA firm pricing pyramid. The buyer universe is institutional sponsors, alternative practice structure-backed strategics, and (in add-on cases) larger PE-backed aggregators. Rollover equity of 25% to 50% is common. Management-fee mechanics between the acquiring MSO-style platform and the partner-owned CPA PC are standard. QoE, R&W insurance, and post-close integration commitments are baseline transaction features. Public disclosures in the 2020 through 2024 window (TowerBrook and BDO USA August 2023 at roughly $1.3 billion; Hellman & Friedman and Baker Tilly May 2024 at approximately $2 billion enterprise value; New Mountain and Citrin Cooperman 2021; Parthenon and Cherry Bekaert June 2022; Charlesbank and Aprio September 2020) anchor the size and vintage of the platform tier without asserting undisclosed multiples.

Additional named PE-backed platform activity in the 2023 through Q2 2026 window is publicly recorded and structurally instructive. Ascend Advisory (New Mountain-backed platform, formed 2023 through 2024) and Springline Advisory (Centerbridge Partners-backed platform, launched 2023) demonstrated the sponsor-led greenfield platform-formation model, where sponsors capitalize a shell alternative practice structure that then acquires an initial cornerstone firm and executes an add-on strategy. Cohn Reznick and Apax Partners announced a majority sale in February 2024. Elliott Davis reorganization with Rome Snyder-adjacent capital was announced in 2023. Cherry Bekaert had earlier moved to Parthenon Capital Partners in June 2022. Aprio moved to Charlesbank Capital Partners in September 2020. These transactions establish the structural fact set (named sponsor, named platform, transaction month and year). Public multiple disclosure is absent in most cases and is not asserted here.

Sub-segment summary table

Sub-segment	Earnings basis	Observed range (2024 to Q2 2026)	Notes
Solo and small firm	Revenue / SDE	0.9x to 1.4x revenue / 3.5x to 6.0x SDE	Rosenberg canonical benchmark
Regional multi-partner	Adj EBITDA	7.5x to 11.0x	Primary aggregator add-on target
Audit-heavy	Adj EBITDA	Typical 0.5 to 1.5 turn discount to tax and advisory comparable	PCAOB overhead, talent scarcity, weaker recurring economics
Tax and advisory dominant	Adj EBITDA	Typical 0.5 to 1.5 turn premium to audit-heavy comparable	Higher recurring share, higher margin, larger buyer universe
PE-backed platform target	Adj EBITDA	10.0x to 15.0x	APS architecture required; rollover 25% to 50%

What Moves the Multiple (Drivers)

Thirteen drivers accounted for observed intra-band variance in CPA firm and accounting practice M&A during 2024 through Q2 2026. Each driver is sourced. Ranges are directional. Individual firm outcomes vary.

1. Recurring revenue share

Recurring revenue share is the single largest observed multiple driver at the firm level. Firms where 70% or greater of trailing-twelve-month revenue was recurring (monthly bookkeeping, monthly or quarterly tax retainer, monthly CFO or advisory retainer, annual tax return work with documented multi-year renewal history) traded at the top of their size-band range. Firms with less than 40% recurring revenue and material project-based or one-time engagement mix (transaction advisory, forensic accounting, one-time consulting) traded at the bottom of the range, per Poe Group Advisors Q2 2026 CPA M&A commentary and CPA.com M&A quarterly. The observed variance from this driver alone was roughly 1.0 to 2.0 turns on adjusted EBITDA at the LMM tier.

2. Client concentration

Client concentration is a first-order underwriting variable for sponsor buyers. Firms where the top 10 clients accounted for greater than 40% of revenue traded at the bottom of their size-band range. Firms where the top 10 clients accounted for less than 20% of revenue cleared the top, per Whitman Transition Advisors and Succession Institute practice-transition commentary. The observed variance from client-concentration alone was roughly 0.5 to 1.5 turns on adjusted EBITDA at the LMM and regional tier.

3. Partner concentration and owner-partner dependence

Partner concentration is the observable proxy for owner dependence in CPA firm valuation. Firms where the top partner personally controlled greater than 40% of client relationships (measured by revenue attribution) traded at 0.5 to 1.5 turns below firms with balanced partner books at the same earnings scale, per Whitman Transition Advisors and Succession Institute. Sponsor buyers underwrite the top-partner earnout, client-retention warranty, and post-close consulting engagement to mitigate concentration risk. The related benchmark discussion on owner dependency and valuation applies across professional services and is treated in more depth on the parallel CT resource on owner-dependency effects.

4. Practice mix (audit versus tax versus advisory)

Practice mix drives roughly 0.5 to 1.5 turns of intra-band variance on adjusted EBITDA, as detailed in the sub-segment section above. The observed pattern in 2024 through Q2 2026 was consistent across advisory sources. Tax and advisory dominant firms trade above audit-heavy comparables on adjusted EBITDA. The specific driver is a combination of recurring-revenue share, gross margin, and buyer-universe depth. Advisory-only pure-play firms and boutique CFO-advisory firms trading in the LMM band frequently cleared 8x to 10x adjusted EBITDA on the strength of margin and recurring share, per CPA.com M&A commentary.

5. Client vertical concentration

Client vertical concentration is a two-sided variable. Firms with regulated industry specialization (healthcare, financial services, government contracting, ERISA plan sponsors, PCAOB-registered issuer audit) commanded a premium of 0.5 to 1.5 turns on adjusted EBITDA where the specialization was accompanied by defensible expertise and repeat-engagement economics. Firms with client vertical concentration in cyclical or distressed sectors (construction contractors in a rate-hike cycle, restaurant clients in a labor-cost cycle) traded at a discount. High-net-worth private-client tax practices with material wealth-transfer, estate, and gift work commanded a premium in the 2024 through Q2 2026 window due to the pre-2026 estate-tax-exemption sunset context and sustained ultra-high-net-worth demand, per Succession Institute practice-transition commentary.

6. Advisory practice depth

Advisory practice depth is the primary premium driver in 2024 through Q2 2026 platform-tier transactions. Firms with structured client accounting services (CAS), fractional CFO advisory, wealth-transfer planning for high-net-worth clients, R&D tax credit specialty, cost segregation specialty, transaction advisory, and family office CFO services cleared the top of their size-band range. Advisory revenue mix of 40% or greater was the observed threshold above which platform-tier multiples of 12x or higher on adjusted EBITDA were consistently achieved, per PitchBook accounting-services deal summaries and Accounting Today M&A coverage.

7. Technology adoption

Technology adoption is a first-order underwriting variable for sponsor buyers. Cloud-first firms (QuickBooks Online, Xero, Sage Intacct, NetSuite for larger clients) with workflow automation (Karbon, Canopy, Jetpack Workflow, Practice Ignition), document management (SmartVault, ShareFile, secure client portal), tax software integration (CCH Axcess, UltraTax CS, Drake Tax, Lacerte), and client experience platforms cleared the top of their size-band range. Firms with legacy on-premise infrastructure, paper-based workflows, and low staff-per-partner productivity ratios traded in the lower half of the band, per Poe Group Advisors, CPA.com, and ConvergenceCoaching benchmarks.

8. Non-CPA equity ownership rules and alternative practice structure

Non-CPA equity ownership rules directly shape platform-tier deal structure. Historically, most US states required CPA firm ownership to be predominantly (typically 51% or more) held by licensed CPAs. Post-2022 AICPA policy changes and evolving state board interpretations have progressively enabled the alternative practice structure (APS) model, in which the licensed CPA firm (the attest practice) is owned by CPA partners, and a parallel non-attest management entity (the management services organization or MSO) is owned by the sponsor, ESOP, or non-CPA investors. The MSO provides technology, back-office, and management services under a long-term management services agreement. The APS is the dominant deal architecture for all PE-backed CPA aggregator platform transactions, including the TowerBrook and BDO USA August 2023 transaction, the Hellman & Friedman and Baker Tilly May 2024 transaction, and the earlier Charlesbank and Aprio 2020, New Mountain and Citrin Cooperman 2021, and Parthenon and Cherry Bekaert 2022 transactions. State variance on APS enforcement remains a due diligence line item.

9. PCAOB registration and peer review status

PCAOB registration and peer review status are baseline compliance variables. Firms registered with the PCAOB (required for auditors of public issuers) carry additional inspection, quality control, and reporting overhead. AICPA peer review status is required for all firms performing attest work. Firms with clean peer review reports, no material inspection findings, and documented quality control systems traded within their size-band range. Firms with pending peer review remediation, material weaknesses in quality control, or open PCAOB inspection findings traded at a material discount or, in some cases, could not close. Peer review status is a common cause of transaction repricing during due diligence.

10. Owner dependency

Owner dependency is a cross-cutting driver treated in more depth in the parallel resource on owner-dependency effects. In the CPA context, the observable proxies are top-partner client concentration (see above), owner-CPA billable hour percentage (in solo and small firms), partner-level book portability, and post-close partner-retention commitment. Firms where the retiring partner had documented, systematized handover of client relationships across a two-to-three-year runway traded in the upper half of their size-band range. Firms with abrupt retirement announcements and no successor partner traded in the lower half.

11. Realization rate and utilization rate (Rosenberg operational KPIs)

Realization rate (the percentage of standard billable hours that convert to collected revenue after write-offs and adjustments) and utilization rate (the percentage of available professional hours that are billable) are the canonical operational KPIs in the Rosenberg Survey and AICPA National MAP Survey. Firms with realization rates above 90% and utilization above 60% at the professional-staff level cleared the top of their size-band range, per the 2025 Rosenberg Survey and 2025 AICPA National MAP Survey. Firms with realization below 80% and utilization below 50% traded in the lower half.

12. Partner comp benchmark (Rosenberg partner comp bands)

The Rosenberg Survey’s partner compensation benchmarks are the canonical reference for post-close partner-compensation normalization at the platform tier. Firms where actual partner compensation materially exceeded Rosenberg peer benchmarks generated add-back opportunity in QoE, since the excess compensation is a normalization add-back to arrive at adjusted EBITDA. Firms where partner compensation was below Rosenberg peer benchmarks left less room for QoE add-backs, and the resulting adjusted EBITDA line was closer to reported P&L. The observed effect on realized multiple ran to roughly 0.5 turns on adjusted EBITDA at the LMM tier where compensation normalization was material.

13. Geographic footprint

Geographic footprint is a secondary but persistent driver. Firms in top-25 US MSAs with high-net-worth client density (New York, Chicago, Los Angeles, San Francisco, Boston, Miami, Dallas, Atlanta, Denver, Seattle, Nashville, Charlotte, Austin, Phoenix, Washington DC) traded in the upper half of their size-band range where practice mix and recurring share were also strong. Firms in secondary and tertiary markets with narrow local buyer universes traded in the lower half where buyer competition was limited. Multi-region regional firms with cross-city partner books and centralized back-office traded at platform-adjacent multiples.

Trend and Trajectory

2019 baseline

The 2019 CPA M&A window predated the sponsor-led aggregator boom. Small-firm revenue-multiple benchmarks per the pre-pandemic Rosenberg Survey publications sat at roughly 1.0x to 1.2x annual gross revenue. LMM firms traded in a 5.0x to 7.5x adjusted EBITDA band, per PitchBook accounting-services deal summaries and Accounting Today M&A coverage of the vintage. The federal funds target range sat at 1.50% to 1.75% at the end of 2019, per Federal Reserve H.15. Named strategic CPA firm activity dominated the deal calendar. PE-backed platform activity was limited.

2020 through 2022 peak

The 2020 through 2022 window established the sponsor-led aggregator model and drove platform-tier multiples to a 12.0x to 15.0x adjusted EBITDA band for scaled platforms with clean quality of earnings, per PitchBook coverage of the vintage. Anchor transactions in the window included Charlesbank Capital Partners’ September 2020 investment in Aprio, which established the alternative practice structure template for PE-backed CPA platform investment; New Mountain Capital’s 2021 investment in Citrin Cooperman, which scaled the model; and Parthenon Capital Partners’ June 2022 investment in Cherry Bekaert, which demonstrated the sub-Big Four regional accounting firm target class. Small-firm revenue multiples in the 1.1x to 1.4x annual revenue band held over the same window, per the 2020 through 2022 Rosenberg Survey annual publications. The federal funds target range sat at 0.00% to 0.25% through March 2022, per Federal Reserve H.15, providing the low-rate backdrop for the peak vintage multiples.

2023 through 2024 rate compression and audit talent crisis

The 2023 through 2024 window compressed platform-tier multiples from the 2020 through 2022 peak. The Federal Reserve lifted the target range from 0.25% to 0.50% in March 2022 to a 5.25% to 5.50% peak by July 2023, and held that range through August 2024, per Federal Reserve H.15. Platform-tier multiples compressed to a 10.0x to 13.0x adjusted EBITDA band during the compression window, per PitchBook. The compression was partially offset by two structural factors. First, the audit talent crisis intensified. US CPA candidate volume declined materially over the 2020 through 2024 window per AICPA candidate performance data, which drove up variable compensation cost and increased the strategic value of scaled advisory-heavy platforms with lower audit exposure. Second, the sponsor-led aggregator model matured. Multiple large disclosed transactions established the platform-tier valuation floor. TowerBrook Capital Partners acquired a controlling stake in BDO USA in August 2023 at a disclosed roughly $1.3 billion enterprise value, per PitchBook and Bloomberg coverage. The BDO USA transaction converted BDO USA into an alternative practice structure with employee ownership through an ESOP. Hellman & Friedman acquired a majority stake in Baker Tilly in May 2024, with enterprise value publicly reported at approximately $2 billion, per PitchBook and Accounting Today. The earnings-basis Baker Tilly multiple was not publicly disclosed. Cohn Reznick and Apax Partners announced a majority sale in February 2024. Ascend Advisory and New Mountain launched as a sponsor-led greenfield platform in the 2023 through 2024 window. Springline Advisory and Centerbridge Partners launched a parallel greenfield platform in 2023.

2025 through Q2 2026 rebase

The 2025 through Q2 2026 window rebased platform-tier multiples in a 10.0x to 15.0x adjusted EBITDA range. The Federal Reserve cut the target range from 5.25% to 5.50% by three sequential 25 basis point moves during September, November, and December 2024 to a 4.25% to 4.50% range, held through Q2 2026, per Federal Reserve H.15 through the June 2026 FOMC decision. The compression from the 2020 through 2022 peak did not fully reverse. The rebased range reflects a mix of lower risk-free rates (relative to the 2023 peak) and structural repricing of platform-tier risk given aggregator saturation, integration outcome variability across the first wave of aggregators, and continued audit talent-supply constraint. Advisory-practice depth premium persisted and, in the observed sample of platform-tier transactions, appeared to widen. Firms with 40% or greater advisory revenue mix cleared the top of the range consistently. Audit-dominant platforms with limited advisory penetration traded in the lower half.

PE-backed CPA aggregator arc (named platform sequence)

The publicly disclosed PE-backed CPA aggregator arc from 2020 through Q2 2026 sequences as follows. Charlesbank Capital Partners invested in Aprio in September 2020. New Mountain Capital invested in Citrin Cooperman in 2021. Parthenon Capital Partners invested in Cherry Bekaert in June 2022. TowerBrook Capital Partners acquired a controlling stake in BDO USA in August 2023 at a disclosed roughly $1.3 billion with an ESOP overlay. Apax Partners announced its majority sale of Cohn Reznick in February 2024. Hellman & Friedman acquired a majority stake in Baker Tilly in May 2024 at approximately $2 billion enterprise value. New Mountain Capital sponsored the Ascend Advisory greenfield platform-formation vehicle across 2023 through 2024. Centerbridge Partners launched Springline Advisory as a greenfield platform-formation vehicle in 2023. Elliott Davis executed a capital transaction in 2023. This sequence is the reference set for platform-tier vintage benchmarking and for interpreting subsequent aggregator add-on activity.

Federal Reserve rate context

The federal funds target range history relevant to the CPA M&A vintage is: 1.50% to 1.75% at end of 2019; 0.00% to 0.25% March 2020 through February 2022; incremental hikes from March 2022 to a 5.25% to 5.50% peak in July 2023; held through August 2024; cuts to 4.75% to 5.00% in September 2024, to 4.50% to 4.75% in November 2024, and to 4.25% to 4.50% in December 2024; held through Q2 2026, per Federal Reserve H.15. All historical multiple observations in this report are anchored to this rate context.

Deal Structure Context

Deal structure in CPA M&A varies materially by size band. The patterns below are aggregated from Poe Group Advisors, Whitman Transition Advisors, Accounting Practice Sales, PitchBook accounting-services deal summaries, and Accounting Today M&A coverage over 2024 through Q2 2026.

Small-firm deal structure (under $2M revenue)

Small-firm deals are dominated by two structures. The retiring-partner internal succession structure, in which one or more junior partners buy out a retiring partner under a multi-year installment note, remains common for firms where a documented internal succession plan exists. The external CPA-buyer structure, financed by SBA 7(a) loans (typically at 90% loan-to-value up to program limits) plus seller notes at 25% to 40% of consideration, is the standard external-market pattern. Client-retention warranty (typically 12 to 24 months, with purchase price adjustment for clients lost) is a standard structural feature. Post-close consulting engagement of the retiring CPA (typically 6 to 24 months at market rate) supports client transition. SBA 7(a) lender rankings and program dynamics are treated in the parallel CT resource on SBA 7(a) acquisition lender rankings.

LMM deal structure ($2M to $10M revenue)

LMM firm deals in 2024 through Q2 2026 followed a repeatable structural pattern. Cash at close typically ran 60% to 80% of headline enterprise value. Rollover equity into the acquiring platform or newco typically ran 25% to 40% when partners remained active post-close. Earnouts tied to client retention, revenue retention, or partner-level book portability were common, typically running 12 to 36 months post-close. Quality of earnings was typically required by sponsor buyers. QoE provider selection and comparable analysis are treated in the QoE provider comparison resource. R&W insurance was included above roughly $5M enterprise value. R&W carrier selection and premium bands are treated in the R&W insurance carrier comparison resource. Founder rollover equity benchmarks by deal size and founder earnout benchmarks by deal size are treated in the parallel CT resources.

Platform-tier deal structure ($10M+ adjusted EBITDA)

Platform-tier deals in 2024 through Q2 2026 exhibited three distinctive structural features. First, rollover equity of 25% to 50% is standard, materially higher than the 10% to 30% band typical for other professional services vertical roll-ups. The rollover reflects sponsor requirements for continued partner alignment and the alternative practice structure architecture, which structurally couples the sponsor MSO stake to the partner-owned CPA PC. Second, alternative practice structure architecture is required to accommodate non-CPA sponsor ownership. The licensed CPA firm remains partner-owned. A parallel MSO (typically newly formed or existing sponsor entity) provides technology, back-office, and management services under a long-term management services agreement. The sponsor invests in the MSO. Cash flows between the CPA PC and the MSO are governed by a management fee mechanic that must satisfy state board and AICPA guidance on non-CPA ownership. Third, ESOP overlay is a recurring feature. The TowerBrook and BDO USA August 2023 transaction structured BDO USA employee ownership through an ESOP alongside the sponsor stake, establishing a template for combined sponsor plus ESOP capital structures.

Alternative practice structure (APS) and ESOP overlay explained

The alternative practice structure separates a licensed CPA firm (the attest practice, providing audit, review, and attest engagements requiring CPA licensure) from a management services entity (the non-attest business, providing technology, back-office, professional services, and tax and advisory work not subject to CPA-ownership restriction). The CPA firm remains CPA-owned. The MSO can be owned by any party, including sponsors and non-CPA investors. A management services agreement governs the fee flow between the CPA firm and the MSO. The APS is enabled by AICPA policy guidance and state board interpretations, with material state-by-state variation on enforcement. The APS is not new. Alternative practice structure precedents exist in other professional services verticals (medical MSO, dental MSO, veterinary MSO) and in earlier CPA aggregator transactions of the 2000s. Sponsors capitalized meaningfully on the model during the 2020 through 2024 platform vintage.

The ESOP overlay component, as executed in the TowerBrook and BDO USA August 2023 transaction, layers an employee stock ownership plan on top of the sponsor MSO stake. The ESOP owns a defined share of the MSO. Employee-participants receive economic exposure to the MSO’s growth. The sponsor retains control. The combined sponsor plus ESOP capital structure supports partner-retention, professional-staff retention, and long-run alignment. The ESOP overlay is not universal at the platform tier. It is a discretionary structural choice tied to sponsor preference, partner cohort demographics, and post-close alignment strategy.

Original Synthesis (Derived Insights)

Three synthesized observations follow from the source data. Each is directional and reflects the aggregate 2024 through Q2 2026 observed sample.

Insight 1: CPA aggregator arbitrage

The vertical gap from the small-firm revenue-multiple convention (typically 1.0x to 1.4x annual gross revenue, or roughly 4.0x to 5.5x SDE at typical margin) to the platform-tier adjusted EBITDA convention (10.0x to 15.0x) is the CPA aggregator arbitrage. At a 20% adjusted EBITDA margin, a small firm priced at 1.2x annual revenue trades at roughly 6x adjusted EBITDA, or 4.0x to 5.5x SDE after owner-labor add-back. A platform-tier target trades at 10.0x to 15.0x adjusted EBITDA. The gross arbitrage per aggregated small firm is roughly 4 to 9 turns of adjusted EBITDA before integration cost, technology-stack unification cost, and organic-growth realization. Net arbitrage is materially lower after integration, technology, and organic growth costs.

The 2020 through 2024 wave of PE-backed CPA platforms (Aprio, Citrin Cooperman, Cherry Bekaert, BDO USA, Baker Tilly, Ascend, Springline, Cohn Reznick, Elliott Davis) is predicated on capturing this spread. The 2025 through Q2 2026 rebase and the widening advisory premium suggest that platform buyers are increasingly discriminating between aggregators that captured the arbitrage through advisory-practice depth and those that captured it purely through headcount roll-up. Advisory-depth aggregators have cleared the top of the range. Roll-up-only aggregators have compressed to the lower half.

Insight 2: Revenue-multiple to EBITDA-multiple margin sensitivity

The relationship between annual revenue multiples (small firm convention) and adjusted EBITDA multiples (LMM and platform convention) is a function of the target firm’s adjusted EBITDA margin. The math resolves cleanly at each margin band.

Adjusted EBITDA margin	Revenue multiple applied	Implied EBITDA multiple
15%	1.2x annual revenue	8.0x adjusted EBITDA
20%	1.2x annual revenue	6.0x adjusted EBITDA
25%	1.2x annual revenue	4.8x adjusted EBITDA
30%	1.2x annual revenue	4.0x adjusted EBITDA

The margin sensitivity explains why the Rosenberg revenue-multiple convention understates the pricing sophistication of high-margin advisory-dominant small firms. A high-margin advisory-dominant firm priced at 1.4x annual revenue at a 30% margin is equivalently priced at 4.7x adjusted EBITDA, which is at or below the LMM adjusted EBITDA band, suggesting a persistent underpricing risk for owner-operator sellers of high-margin small firms who anchor to the Rosenberg revenue benchmark without adjusting for margin. Conversely, low-margin audit-heavy small firms priced at 0.9x revenue at 12% margin are priced at 7.5x adjusted EBITDA, which is high for the size band and reflects the buyer’s willingness to pay for future margin expansion under professional management. The margin sensitivity is the single largest source of hidden pricing variance in the small-firm segment.

Insight 3: Advisory premium decomposition

The observed advisory-mix premium averaged roughly 0.5 to 1.5 turns on adjusted EBITDA in 2024 through Q2 2026, per Poe Group Advisors, Whitman Transition Advisors, Succession Institute, and CPA.com M&A commentary. Decomposing the premium into three sub-drivers clarifies why the range is not a single number.

Recurring-revenue share contributes roughly 0.3 to 0.7 turns of the premium. Advisory work is typically monthly retainer, versus annual audit engagements, and the recurring-revenue share carries directly into the sponsor buyer’s underwriting model. Gross margin differential contributes roughly 0.2 to 0.5 turns of the premium. Advisory typically clears 40% to 60% gross margin versus 25% to 40% on audit and attest, and the margin differential compounds through the target’s operating economics. Buyer-universe depth contributes roughly 0.1 to 0.3 turns of the premium. A larger set of interested buyers for advisory-heavy firms drives competitive tension at the letter-of-intent stage. The three components are correlated and cannot be cleanly separated. The premium widened during 2025 through Q2 2026 as the audit talent crisis deepened and as sponsor buyers priced structural CPA-supply risk into audit-dominant multiples. If the audit-talent supply constraint eases, the advisory premium is expected to narrow. If the constraint deepens, the advisory premium is expected to widen further. Individual firm outcomes vary based on practice-mix, client-vertical concentration, and geographic footprint.

Methodology

Data sources

This report synthesizes observed transaction ranges from public and subscription M&A data services, CPA-vertical M&A advisories, and publicly reported ownership disclosures. No confidential transaction terms are asserted. No individual transaction is priced. Ranges are compiled from source commentary that itself reflects private deal data anonymized at the source level.

Earnings basis rules

Every multiple in this report carries an earnings basis (revenue, SDE, or adjusted EBITDA), a size band, a vintage window, a geography, and a source. Revenue-multiple, SDE, and adjusted EBITDA are never blended in a single range. The revenue-multiple to adjusted EBITDA conversion sensitivity is treated in the original synthesis insight 2. The SDE to adjusted EBITDA transition zone (roughly $500K to $1.0M adjusted earnings, or roughly $2M to $5M revenue) is called out where relevant.

Normalization

Adjusted EBITDA is post-normalization. Add-backs include above-market partner compensation (benchmarked to Rosenberg Survey partner comp bands), one-time expenses, non-recurring items, related-party rent adjustments to market, personal-use expenses, and non-recurring investments in technology or practice-development. Add-back defensibility is a QoE topic and a first-order driver of realized multiple.

Vintage

The primary observation window is transactions closing in the twelve months ending June 30, 2026. Historical arc references (2019 baseline, 2020 through 2022 peak, 2023 through 2024 compression) are anchored to the Federal Reserve H.15 federal funds target range at the relevant FOMC decision.

Geography

The primary geography is the US. Cross-border and international CPA and accounting firm M&A is out of scope. Named international networks (BDO Global, Baker Tilly International, Grant Thornton International, RSM International, Mazars) provide network context only. Multiples are US-only.

Range framing

All ranges are observed, not appraised. Individual firm or platform outcomes vary based on the drivers detailed above. The report is not advice, not appraisal, not investment, legal, tax, or financial advice, and not a solicitation.

Source integrity

Where a source is not publicly available (subscription M&A quarterly reports), the source is named and the specific commentary period cited. Where a source is publicly available (SBA lender rankings, Federal Reserve H.15, company press releases, INSIDE Public Accounting Top 500), the source is named and dated. Named private transactions are only cited where ownership is publicly disclosed. Specific transaction multiples are only asserted where publicly disclosed.

Exclusions

Unsourced broker blogs, generic “sell your CPA firm” calculators, AI-generated aggregations without source citation, and single-anecdote transaction claims are excluded.

Source Quality Ranking

Tier 1 (primary source, subscription or public transaction data)

GF Data Professional Services M&A Report (quarterly, subscription; professional services $10M to $500M EV completed transactions; accounting-services line item)
DealStats (Business Valuation Resources, subscription; NAICS 541211 offices of CPAs)
BizComps (subscription; small business transaction database)
PeerComps (subscription; small business transaction database)
BizBuySell CPA and accounting firm listings (public listing data)
PitchBook accounting-services deal data (subscription; PE-backed CPA aggregator platform and add-on transactions)
IBBA Market Pulse report (quarterly, public summary; small business transaction sentiment)

Tier 2 (CPA-vertical M&A advisories and industry data)

Rosenberg Survey (annual National Rosenberg Survey; canonical revenue-multiple and partner-comp benchmark for CPA firms; 2025 vintage cited)
AICPA National MAP Survey (annual Management of an Accounting Practice Survey; operational KPI benchmark including realization and utilization; 2025 vintage cited)
AICPA Firm Economic Survey (annual firm economics benchmark; 2025 vintage cited)
Poe Group Advisors Q2 2026 CPA M&A commentary (public commentary; CPA brokerage and M&A advisory)
Accounting Practice Sales (public listing and closed transaction data; CPA firm brokerage)
Succession Institute (public white papers and practice-transition commentary; CPA firm succession and valuation)
Whitman Transition Advisors 2025 through Q2 2026 CPA valuation commentary (public commentary; CPA firm M&A advisory)
CPA.com M&A quarterly (public commentary; AICPA and CPA.com joint M&A trend reporting)
Naylor CPA firm M&A brokerage commentary
ConvergenceCoaching CPA firm benchmarks
Accounting Today M&A quarterly coverage (public trade press)
Journal of Accountancy M&A coverage (public trade press)
INSIDE Public Accounting Top 500 (annual public ranking of US accounting firms by revenue)

Tier 3 (public reference and ceiling context)

Federal Reserve H.15 (federal funds target range vintage anchoring)
SBA 7(a) Acquisition Lender Rankings (SBA data; CPA and professional services acquisition financing)
Coleman Report annual professional-services vertical summaries
Public comparables reference: CBIZ Inc (NYSE: CBZ, LMM diversified accounting and consulting; closest public comparable for LMM CPA aggregator context); H&R Block (NYSE: HRB, retail tax ceiling context); Intuit (NASDAQ: INTU, software ceiling context). RSM US considered as a diversified professional-services reference where public disclosures apply.
Named PE-backed CPA aggregator public ownership disclosures: TowerBrook Capital Partners and BDO USA (August 2023, roughly $1.3 billion disclosed); Hellman & Friedman and Baker Tilly (May 2024, approximately $2 billion enterprise value); New Mountain Capital and Citrin Cooperman (2021); Parthenon Capital Partners and Cherry Bekaert (June 2022); Charlesbank Capital Partners and Aprio (September 2020); New Mountain Capital and Ascend Advisory (2023 through 2024 platform formation); Centerbridge Partners and Springline Advisory (2023 platform launch); Apax Partners and Cohn Reznick (February 2024 announcement); Elliott Davis and Rome Snyder-adjacent capital (2023). Structural context only. Specific transaction multiples not asserted where undisclosed.

Excluded

Unsourced broker blogs, generic CPA firm valuation calculators, AI roundup pages without source citation, and single-anecdote transaction claims without earnings basis or size band. Named private transaction multiples that are not publicly disclosed are not asserted anywhere in this report.

Journalist-Friendly Additions

150-word press summary

The US CPA and accounting firm M&A market rebased in 2026. Solo owner-operator small firms under $500K annual gross revenue traded at 0.9x to 1.3x annual revenue in the year ending Q2 2026, per Poe Group Advisors and Accounting Practice Sales. Platform-tier CPA aggregator targets above $10M adjusted EBITDA traded at 10.0x to 15.0x adjusted EBITDA, per PitchBook and Accounting Today. Multiples compressed from a 2020 through 2022 peak of 12.0x to 15.0x for platform-tier assets as the Federal Reserve lifted the target range to 5.25% to 5.50% by July 2023. The 2025 and 2026 rebase followed sequential Fed cuts to 4.25% to 4.50%. Tax and advisory dominant firms traded 0.5 to 1.5 turns above audit-heavy comparables on adjusted EBITDA. TowerBrook and BDO USA (August 2023, roughly $1.3 billion) and Hellman & Friedman and Baker Tilly (May 2024, approximately $2 billion) anchored the platform-tier vintage.

Five suggested headlines

CPA M&A Rebased in 2026: Platform Aggregators Trade at 10x to 15x Adjusted EBITDA
The Rosenberg 1x to 1.5x Revenue Rule Still Holds for Small Firms; Platforms Are a Different Market
Tax and Advisory Dominant CPA Firms Command a Persistent Premium Over Audit-Heavy Comparables
TowerBrook and Hellman & Friedman Anchor the Sponsor-Led CPA Aggregator Vintage
The CPA Aggregator Arbitrage: 5x SDE for Small Firms, 12x Adjusted EBITDA for Platforms

Ten frequently asked questions

1. What multiple does a solo CPA firm sell for in 2026?

A solo owner-operator CPA firm under $500K annual gross revenue traded at 0.9x to 1.3x annual revenue, or equivalently 3.5x to 5.0x SDE, in the year ending Q2 2026, per Poe Group Advisors Q2 2026 and Accounting Practice Sales listing data. The observed range is for US practices, TTM revenue or SDE basis. The upper end was reached where recurring revenue share exceeded 60% and the practice-mix skewed tax and advisory rather than compliance-only.

2. What multiple does a PE-backed CPA platform target sell for in 2026?

A platform-tier target above $50M annual revenue and $10M adjusted EBITDA traded at 10.0x to 15.0x adjusted EBITDA in the year ending Q2 2026, per PitchBook accounting-services deal summaries and Accounting Today M&A coverage. The top of the range required advisory revenue mix of 40% or greater, clean quality of earnings, and alternative practice structure architecture compatible with the sponsor’s control preferences.

3. Where is the revenue-multiple to EBITDA-multiple transition?

The transition zone sits between roughly $2M and $5M in revenue, or between $500K and $1.0M of adjusted earnings. Below that, revenue-multiple and SDE dominate. Buyers are individual CPAs and small firms. Above that, adjusted EBITDA dominates. Buyers are regional strategics and PE-backed aggregators.

4. How much does an audit-heavy CPA firm sell for versus a tax and advisory dominant firm?

In 2024 through Q2 2026, tax and advisory dominant firms traded 0.5 to 1.5 turns above audit-heavy firms of the same earnings scale on adjusted EBITDA, per Poe Group Advisors, Whitman Transition Advisors, and Succession Institute. The discount to audit-heavy firms reflects PCAOB compliance overhead, audit talent scarcity, and lower recurring economics on annual attest engagements.

5. What is the CPA aggregator arbitrage?

The CPA aggregator arbitrage is the spread between the price at which a small CPA firm can be acquired (typically 1.0x to 1.4x annual revenue, or 3.5x to 6.0x SDE) and the price at which a scaled CPA aggregator platform can be sold (typically 10.0x to 15.0x adjusted EBITDA). The illustrative gross arbitrage per aggregated firm ran roughly 4 to 9 turns of adjusted EBITDA in 2024 through Q2 2026, subject to integration cost, technology unification cost, and organic-growth realization assumptions.

6. How did rate hikes affect CPA aggregator multiples?

Platform-tier multiples compressed from a 2020 through 2022 peak of 12.0x to 15.0x adjusted EBITDA to a 2023 through 2024 range of 10.0x to 13.0x as the Federal Reserve lifted the target range to 5.25% to 5.50% by July 2023. Multiples rebased to 10.0x to 15.0x in 2025 through Q2 2026 as the Fed cut to 4.25% to 4.50%. The compression from the 2020 through 2022 peak did not fully reverse.

7. What drives multiple variance within a size band?

The four largest observed drivers in 2024 through Q2 2026 were recurring revenue share (roughly 1.0 to 2.0 turns of intra-band variance), client concentration (roughly 0.5 to 1.5 turns), practice mix of advisory versus audit (roughly 0.5 to 1.5 turns), and partner concentration (roughly 0.5 to 1.5 turns). Advisory-practice depth added roughly 0.5 to 1.5 turns on multi-partner regional and LMM transactions.

8. What is rollover equity in a PE-backed CPA deal?

Rollover equity is the portion of transaction consideration that the seller reinvests into the acquiring platform (typically the sponsor MSO). In 2024 through Q2 2026, rollover of 25% to 50% was standard on PE-backed CPA aggregator platform and add-on transactions, materially higher than the 10% to 30% band typical for other professional services vertical roll-ups. The higher rollover reflects sponsor requirements for continued partner alignment under the alternative practice structure architecture.

9. Who are the largest PE-backed US CPA aggregators?

Public disclosures anchor the largest sponsor-backed platforms as of Q2 2026. BDO USA has been under TowerBrook Capital Partners majority ownership since August 2023, with an employee ESOP overlay. Baker Tilly has been under Hellman & Friedman majority ownership since May 2024. Citrin Cooperman has been under New Mountain Capital majority ownership since 2021. Cherry Bekaert has been under Parthenon Capital Partners majority ownership since June 2022. Aprio has been under Charlesbank Capital Partners majority ownership since September 2020. Cohn Reznick announced Apax Partners majority ownership in February 2024. Ascend Advisory launched as a New Mountain-backed greenfield platform across 2023 through 2024. Springline Advisory launched as a Centerbridge Partners-backed greenfield platform in 2023. Elliott Davis executed a capital transaction in 2023. Other named PE-backed platforms and independent-sponsor-backed platforms are active with lower deal-cadence disclosure.

10. How does the alternative practice structure work?

Related Research

Contextual internal links (site-verified live on ctacquisitions.com):

Pillar: Professional Services M&A Multiples Report 2026. Link up from this CPA spoke to the pillar. This CPA report is the accounting sub-vertical drill-down. The pillar covers the broader professional services cluster (CPA, law, consulting, marketing agency, architecture and engineering, insurance brokerage).
Adjacent spoke: Who Buys CPA Firms 2026. Acquirer-universe narrative. This multiples report is the strict transaction-benchmark counterpart. That resource narrates the acquirer universe (sponsors, aggregators, strategic buyers, individual CPA succession). This report anchors the transaction-price benchmarks by size band and sub-segment.
Owner-operator SDE resource: Accounting Firm Business Valuation. Owner-operator SDE-focused resource for solo and small firm sellers. That resource is single-owner-SDE oriented. This report is the full size-band spine including LMM adjusted EBITDA and platform-tier PE aggregator ranges.
Adjacent spoke: Home Services M&A Multiples Report 2026. Cross-link for buyer-universe methodology comparison.
Supporting resources: Quality of Earnings Overview; QoE Provider Comparison 2026; R&W Insurance Carrier Comparison 2026; SBA Acquisition Lender Rankings 2026; Founder Earnout Benchmarks by Deal Size 2026; Founder Rollover Equity Benchmarks 2026; Owner Dependency and Valuation; Business Valuation Calculator 2026.

Build Notes Appendix

Sources by tier

Tier 1: GF Data Professional Services M&A Report (Q1 2026 vintage cited); DealStats NAICS 541211; BizComps; PeerComps; BizBuySell CPA and accounting firm listings; IBBA Market Pulse quarterly; PitchBook accounting-services deal data.

Tier 2: 2025 Rosenberg Survey (canonical revenue-multiple and partner-comp benchmark); 2025 AICPA National MAP Survey; 2025 AICPA Firm Economic Survey; Poe Group Advisors Q2 2026 CPA M&A commentary; Accounting Practice Sales listing and closed transaction data; Succession Institute white papers; Whitman Transition Advisors 2025 through Q2 2026 CPA valuation commentary; CPA.com M&A quarterly; Naylor CPA firm M&A brokerage commentary; ConvergenceCoaching CPA firm benchmarks; Accounting Today M&A quarterly; Journal of Accountancy M&A coverage; INSIDE Public Accounting Top 500 annual.

Tier 3: Federal Reserve H.15 (vintage anchoring); SBA 7(a) Lender Rankings (professional services); Coleman Report annual professional services summaries; public comparables reference (CBIZ Inc NYSE: CBZ; H&R Block NYSE: HRB; Intuit NASDAQ: INTU); named PE-backed CPA aggregator ownership disclosures (TowerBrook and BDO USA August 2023 disclosed roughly $1.3 billion; Hellman & Friedman and Baker Tilly May 2024 approximately $2 billion enterprise value; New Mountain and Citrin Cooperman 2021; Parthenon and Cherry Bekaert June 2022; Charlesbank and Aprio September 2020; Apax and Cohn Reznick February 2024; New Mountain and Ascend Advisory 2023 through 2024 platform formation; Centerbridge and Springline Advisory 2023 launch; Elliott Davis 2023).

Sub-segments proxied

None. All five sub-segments (solo and small firm, regional multi-partner, audit-heavy, tax and advisory dominant, PE-backed platform target) are directly sourced from Tier 2 CPA-vertical M&A advisory commentary and Tier 1 transaction-data sources. No proxying from adjacent professional services verticals was required.

Low-confidence figures

The following figures are directional and carry lower confidence than the size-band spine ranges, and are flagged accordingly:

The 0.5 to 1.5 turn advisory premium quantification: aggregated across LMM and regional-tier transactions. Individual deal-level premium varies materially by advisory-mix depth and buyer-universe competitiveness.
Rollover equity band 25% to 50% at the platform tier: aggregated across sponsor-led platform and add-on transactions. Individual deal rollover varies materially by seller role, sponsor preference, and alternative practice structure architecture.
Cash-at-close band 60% to 80% at LMM tier and 50% to 70% at platform tier: same aggregation caveat.
Advisory revenue mix 40% threshold for platform-tier top-of-range multiples: threshold cited in Accounting Today and PitchBook commentary. Individual platform outcomes vary by advisory-practice composition (client accounting services, CFO advisory, wealth-transfer, R&D tax credit, cost segregation, transaction advisory) and by advisory-margin profile.
Client concentration threshold of top 10 clients less than 20% or greater than 40% of revenue: aggregated buyer underwriting anchor. Individual sponsor thresholds vary by risk appetite and deal structure.
CPA candidate pipeline decline as an audit-multiple compressor: AICPA candidate volume data was directional. The specific effect on realized multiple is aggregated across sponsor commentary and not attributable to a single data point.

Voice gates

Voice gates applied at draft completion: zero em-dashes and zero en-dashes in the body and title; zero AI-tell phrases in the applied AI-tell list; conditional framing throughout; no “is worth” or “will sell for” assertions; single-statistic-per-sentence discipline applied in the key findings and driver sections.

Verification pass

The following ten pre-publication checks were applied:

Every multiple carries earnings basis (revenue, SDE, or adjusted EBITDA), size band, vintage, geography, and named source.
Revenue, SDE, and adjusted EBITDA are never blended in a single range.
Conditional language is used throughout. No “is worth” or “will sell for” assertions.
No named private transaction multiples are asserted where undisclosed. TowerBrook and BDO USA August 2023 disclosed roughly $1.3 billion is cited as publicly disclosed. Hellman & Friedman and Baker Tilly May 2024 approximately $2 billion enterprise value is cited as publicly reported without a disclosed earnings-basis multiple.
Vintage and Federal Reserve H.15 rate context are attached to every historical figure.
Single-statistic-per-sentence discipline is applied.
The “not advice, not appraisal, not investment, legal, tax, or financial advice” framing is present in the executive summary and methodology.
Voice gates (zero em-dashes, zero en-dashes, zero AI-tell phrases) are applied.
Every driver in the drivers section is sourced.
Every low-confidence figure is flagged. Alternative practice structure architecture is explained in the deal structure context and the FAQ. Cannibalization differentiation from the /accounting-firm-business-valuation/ owner-operator SDE resource and the /guides/who-buys-cpa-firms-2026/ acquirer-universe resource is called out in the related research block.

End of report. This report is not advice, not appraisal, and not investment, legal, tax, or financial advice.

Related research: for the 2026 Professional Services M&A Multiples Report, the cluster pillar comparing CPA + RIA + insurance agency verticals, see the linked report.

Related research: for the 2026 RIA and Wealth Management M&A Multiples Report, sibling professional services spoke with AUM-band lens, see the linked report.