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Buy a CPA Firm in 2026: 1-1.5x Revenue or 6-12x EBITDA, Alternative Practice Structure, Named PE Platforms

Updated June 2026 · CT Acquisitions

Buying a CPA firm is the dominant lower-middle-market professional services play of this decade. Between 2021 and 2025, private equity broke a 130-year tradition of partner-only ownership through the alternative practice structure, and every quarter brings a new platform deal: Aprio to Charlesbank, CohnReznick to Apax, Grant Thornton to New Mountain. For buyers, the opportunity is structural: roughly 75% of CPA firms have at least one partner past traditional retirement age, the AICPA pipeline shortage means founders cannot easily sell internally, and recurring CAS revenue commands premium multiples that did not exist five years ago. The difficulty is sourcing the right firm, underwriting it correctly under state ownership rules, and integrating without breaking partner relationships.

Why CPA firms are the hottest professional services roll-up

Three structural forces have turned buying a CPA firm into the most actively contested professional services trade in the lower middle market, and they reinforce each other.

First, recurring revenue with switching costs few service businesses match. A typical accounting practice sees 80%+ of clients return year over year. Tax compliance follows the calendar, monthly bookkeeping and CAS engagements run on retainer, and audit work for closely held companies is locked in by relationship inertia and the pain of switching attest firms. Add CAS or virtual CFO on top of compliance and per-client revenue and retention both step up.

Second, succession demand. Accounting Today reporting on AICPA demographics pegs the share of firms with at least one partner over 55 at roughly 75%. Internal succession is harder than ever because the AICPA candidate pipeline has been shrinking for a decade and the cost of partner buy-in is at multi-decade highs. Founders who would historically have sold internally are now selling externally.

Third, the alternative practice structure opened the door to PE capital. The breakthrough came in August 2021 when New Mountain Capital acquired Citrin Cooperman through an alternative practice structure where the holding company owns the non-attest book and a CPA-owned attest firm operates the licensed audit work under a long-term services agreement. Every major PE platform deal since (CohnReznick / Apax 2024, Cherry Bekaert / Parthenon 2022, Aprio / Charlesbank 2024, EisnerAmper / TowerBrook 2021, Grant Thornton / New Mountain 2024) has used a variant of the same structure.

What buyers are actually paying for CPA firms in 2026

Valuation ranges in accounting are wider than most categories because the revenue mix swing is enormous. A firm generating $3M of revenue from straight 1040 compliance and quarterly bookkeeping is a fundamentally different asset than a $3M firm generating 50% from CAS, virtual CFO, and advisory engagements. The multiples reflect the difference, and the gap has widened since 2022 as PE platforms have aggressively bid up advisory-led firms.

The spread between a 5x firm and a 12x firm is not random. Six factors explain almost all of it:

• CAS and advisory mix. Client Accounting Services, virtual CFO, and advisory engagements bill on retainer and carry the highest margins. Buyers apply platform multiples (9x to 12x) to this revenue and lower multiples to seasonal compliance.
• Partner retention. Non-founding partners and senior managers who hold client relationships need to stay. Buyers structure equity rollover and earnout specifically to retain second-tier partners.
• Client concentration. No single client over 10% of revenue for platform pricing. Above 15% triggers a discount; above 25% is often a deal breaker.
• Recurring revenue percentage. Monthly retainer engagements (CAS, virtual CFO, payroll, fractional controller) command the highest multiples. Annual tax compliance is recurring but commands lower multiples than monthly work.
• Technology stack. Firms on QuickBooks Online, Xero, Karbon, or Canopy with clean client data are valuation multipliers. Paper files and spreadsheets are a discount.
• Founder dependence. If the founding partner manages the top 20 client relationships and signs every return, buyers apply a key-person discount and require a 2 to 5 year transition. Firms where the founder has already moved into a chairman role command premium multiples.

The 2026 pricing reality

PE platforms are aggressively competing for advisory-led firms in the $1.5M to $10M EBITDA range. Platform-grade firms in this band routinely receive multiple LOIs at 9x to 11x EBITDA, often with substantial equity rollover into the platform itself. Founders who two years ago would have sold to a regional CPA firm for 1.0x revenue and a 3-year payout are now closing platform transactions at 1.4x revenue with 20% equity rollover into a holding company that is on its own path to a strategic exit.

For independent buyers, search funders, and smaller regional CPA firms competing with PE platforms, the implication is that you either need a differentiated thesis (industry niche the platforms overlook, geography below their radar, sub-$1M EBITDA scale) or you need to win on non-price factors like cultural fit, partnership track, and operational continuity. In the sub-$1M EBITDA band, valuations are still 0.9x to 1.2x revenue and founders frequently weight legacy and team continuity above maximum check size.

The alternative practice structure: how PE actually owns CPA firms

You cannot buy a CPA firm in 2026 without understanding the alternative practice structure (APS). The AICPA Code of Conduct and state boards of accountancy require majority ownership of any firm performing attest services (audits, reviews, SSAE examinations) be held by licensed CPAs. State rules in CA, NY, IL, TX, FL, and others further restrict non-CPA ownership.

The standard structure:

• The licensed attest firm stays majority-owned by CPAs. It performs all audit, review, and attestation work and bears licensing, peer review, and PCAOB (where applicable) obligations.
• A separate holding company is owned by the PE sponsor and rolled-over founder equity. It owns and operates the non-attest book: tax compliance, CAS, advisory, bookkeeping, virtual CFO, R&D credit work, transaction advisory, valuation, wealth management. It employs the non-attest staff.
• A long-term services agreement binds the two entities. The holding company provides administrative, technology, real estate, marketing, and back-office services to the attest firm at arm’s-length pricing.

Citrin Cooperman / New Mountain (Aug 2021) was the first major test. Cherry Bekaert / Parthenon (June 2022), EisnerAmper / TowerBrook (Aug 2021), Aprio / Charlesbank (2024), CohnReznick / Apax (2024), Grant Thornton / New Mountain (2024), and Crete Professionals Alliance (Cathay Capital since 2022) replicated the structure. State boards in CA, NY, IL, and TX engaged with the model and accepted it with disclosure and independence protections.

For buyers below platform scale, you do not need an APS if you are a CPA buying another CPA firm. The structure exists specifically to let non-CPA capital own the non-attest economics. Search funders, family offices, and non-CPA strategics must work with counsel experienced in state board negotiations.

The six buyer archetypes in CPA accounting

Understanding which buyer you are (and which you are competing against) changes how you structure offers.

1. PE-backed accounting platforms

National platforms acquiring 10 to 40 add-ons over a 4 to 7 year hold. They pay the highest multiples because they can apply debt against the combined entity, charge management services fees, and exit at a higher multiple. Target profile: $2M+ EBITDA, 30%+ CAS or advisory mix, multiple non-founding partners. Active platforms: Aprio (Charlesbank 2024), Citrin Cooperman (New Mountain 2021), Cherry Bekaert (Parthenon 2022), CohnReznick (Apax 2024), EisnerAmper (TowerBrook 2021), Crete Professionals Alliance (Cathay Capital 2022), Grant Thornton Advisors (New Mountain 2024). They move fast and write 65% to 75% at close with 15% to 25% equity rollover.

2. Strategic acquirers (regional and national CPA firms)

Mid-sized and large independent CPA firms filling geographic gaps, adding industry depth, or buying into new service lines. Competitive multiples for firms that complete a regional footprint. Integration is smoother since they understand the model. Smith + Howard (Goldenrod Capital Partners minority since 2024), PKF O’Connor Davies, and dozens of regional firms are active here.

3. Independent sponsors and family offices

Deal-by-deal capital that compete on creative structuring (earnouts, rollover equity, seller notes) when they cannot match platform pricing. Family offices with 10 to 25 year horizons are increasingly active because the cash yield fits their mandate.

4. Search funders

Individual operators with institutional backing looking for one firm to run. CPA searchers must either be CPAs or partner with a licensed CPA for the attest entity. Multiples: 4x to 6x SDE/EBITDA. Target: $400K to $2M SDE, established client base, processes that do not require the founder.

5. CPA-led roll-ups (operator consolidators)

CPAs assembling multi-office platforms funded by seller financing, SBA, and mezzanine. Cannot match institutional platform pricing but move fast on smaller deals ($300K to $1.5M EBITDA) with the strongest cultural continuity story.

6. Specialty buyers (wealth managers, law firms, fintech)

RIAs and wealth managers increasingly acquire small CPA practices to capture tax and accounting work for HNW clients. Fintech and CAS-focused operators occasionally buy regional bookkeeping books. These buyers price idiosyncratically.

Due diligence: the CPA-specific deep dive

Generic M&A diligence is necessary but not sufficient. The CPA-specific signals are where value creation and destruction actually happen. Here is what experienced CPA buyers do in addition to standard quality of earnings, legal, and insurance review.

Revenue mix decomposition

Do not accept the seller’s definition of recurring revenue. Pull 24 months of billing data and bucket every invoice into: annual 1040 compliance, annual 1120/1065 entity compliance, monthly bookkeeping, CAS, virtual CFO and advisory, audit and review (attest), specialty engagements (R&D credit, ERC, transaction advisory, valuation), and project work. The boundaries are fuzzy and sellers classify aggressively. Buyers who do not rebuild the mix routinely overpay because they apply CAS multiples to revenue that is functionally seasonal compliance.

Client book analysis

For every active client engagement: acquisition date, current fee, contract type (annual, monthly retainer, project), service lines purchased, and historical fee trajectory. A healthy CPA firm shows:

• 80%+ annual client retention by count, 90%+ by revenue
• Average revenue per client growing 4% to 8% annually through pricing and cross-sell
• 30% or more of compliance clients also purchasing CAS, advisory, or specialty work
• Client age distribution with healthy ingress (clients added in the last 24 months), not just an aging existing base

The red flags are clients on below-market pricing that have not been repriced in 3+ years, declining same-client revenue over the trailing 3 years, and an aging client base with little new client acquisition (often a sign the founder has stopped selling).

Partner and senior manager economics

Build a partner-and-manager-level P&L for the trailing 12 months. Key metrics: book of business per partner, realization rate (collected vs standard rate), chargeable hour utilization, and individual gross margin contribution. The delta between top-third and bottom-third partners is typically 30% to 50%. Identify which partners are essential client relationship owners and structure retention specifically for them.

Realization and recovery

Pull realization data by service line, client, and partner. CPA firms typically run at 85% to 95% realization on standard rates. Firms below 80% often have one of three problems: under-pricing, inefficient delivery, or a write-down culture compounded over years. All three are addressable but represent real EBITDA work.

Client concentration stress test

Pull the top 20 clients by revenue and trailing 12 month gross profit. Identify which clients are transferable (long-tenured operating companies, firms that hired the practice and not the partner) versus at-risk (founder personal relationships, single-person decision makers, clients added through the founder’s civic or country club network). Model loss scenarios where 50% of the founder-relationship clients churn in the 24 months post close.

Attest book and peer review

Pull the most recent peer review and any inspection findings (PCAOB if applicable). Review the attest client list for industry concentration, going-concern history, restatements, and litigation. Attest work carries malpractice risk that is often the single largest contingent liability in a CPA acquisition.

Regulatory and state board

Confirm the firm permit is in good standing in every state of practice. Review CPE compliance for every CPA on staff. For PE-backed transactions, plan for state-by-state APS filings in CA, NY, IL, TX, and FL. Multi-state APS legal work runs 60 to 120 days and $200K to $500K for a platform-scale transaction.

Structuring the offer

The best buyers win on structure as often as on price. A well-structured offer can beat a higher nominal offer if it matches what the selling partners actually care about.

The standard CPA deal structure (2026)

• Cash at close: 60% to 75% of total consideration for platform deals; 70% to 85% for non-PE strategic deals.
• Equity rollover: 15% to 25% in PE platform deals, almost always into the holding company alongside the sponsor. Often 0% in strategic deals.
• Earnout: 10% to 20% over 24 to 36 months, typically tied to revenue retention or recurring revenue growth (not EBITDA, because the platform controls post-close cost allocation).
• Escrow: 10% to 15% held 12 to 24 months against indemnification claims, with malpractice claims often handled through separate tail insurance.
• Seller note: 0% to 15%, typically subordinated to senior debt, 5 to 7 year amortization. Common in independent sponsor, search fund, and CPA-led roll-up deals; less common in PE platform deals.
• Partner employment agreements: typically 3 to 5 years for founding partners, 2 to 3 years for second-tier partners, with non-compete and non-solicit covenants tailored to enforceable state law.

Where smart buyers differentiate

The offer components partners weight most heavily (in order): cash at close, partner retention and equity participation, cultural and professional continuity, client treatment and brand continuity, and timeline certainty. Price per se is often the 4th or 5th factor, particularly for founders approaching retirement who care about how the firm and their team are treated.

Buyers who win on non-price factors typically pre-commit to retention bonuses for named senior managers and second-tier partners (often 30% to 60% of annual compensation paid over 24 to 36 months), write earnouts with achievable floors (90% revenue retention triggers a minimum payment), commit to brand continuity for 2 to 5 years, and minimize disruption to existing client service teams in the first 12 months.

The earnout trap in CPA deals

The single most destructive element of a CPA deal is a poorly designed earnout. If the earnout is tied to EBITDA, partners worry about post-close cost allocation and rationally underperform. If it is tied to new client acquisition, the founder may not have the energy or pipeline to deliver. If it is tied to metrics the partner does not control (cross-sell of services the platform adds), it is functionally a price reduction.

The structures that work in CPA: client retention percentage (measured against a baseline list at close), recurring revenue retention rate, and partner retention (the second-tier partners staying for 24 to 36 months). All three are things the selling partner can meaningfully influence in the transition window.

Integration: where acquirers create or destroy value

PE platforms publicly cite their integration playbooks, but the reality is more variable than the marketing decks suggest. The CPA deals that compound are the ones where buyers respect three principles.

Do not break client relationships in year one

Selling partners have spent decades building trust with their clients. Buyers who push centralized client service models, re-team accounts, or impose unfamiliar billing systems in the first 6 months see client churn that destroys the deal thesis. The correct approach is a 12 to 18 month transition where client teams stay stable, billing continues as-is, and operational integration happens in the back office.

Lock in second-tier partners before close

Top non-founding partners and senior managers know their value. Once a deal is announced, recruiters call within 48 hours. Smart buyers structure retention packages for named senior managers and partners (typically 30% to 60% of annual comp, paid over 24 to 36 months) contingent on continued employment. Finalize before close, not after.

Preserve the partnership culture

CPA firms run on partnership culture: weekly partner meetings, mentor relationships, how engagements are staffed and reviewed. Buyers who swap in corporate processes in month one frequently break the firm. Document the existing rhythms, identify what is working, and change deliberately over 9 to 18 months with the second-tier partners who will be running the firm in 5 years.

Financing a CPA firm acquisition

Capital structure varies by buyer type, but some patterns are consistent in 2026.

SBA 7(a) loans

Independent buyers and search funders commonly use SBA 7(a) for CPA acquisitions up to $5M. Rates are prime plus 2.0% to 2.75% with 10-year amortization. The constraint: SBA requires the seller to exit operationally within 12 months. For CPA deals requiring a 3 to 5 year founder transition, SBA can be a problem. Many SBA-funded CPA buyers structure a year-one full-time founder role, then consulting in year 2.

Commercial bank acquisition lending

Regional banks with professional services experience will lend 2.5x to 4.0x EBITDA at prime plus 1.5% to 2.5% because recurring revenue is bankable. Cash flow covenants typical. Best for CPA-led roll-ups and strategic CPA acquirers.

Mezzanine and unitranche

For platform or larger independent deals ($5M+ EBITDA), mezzanine bridges senior debt and equity. Rates 10% to 14% with warrants. Common providers: Twin Brook, Monroe, Antares, Audax Senior Debt. PE platforms typically run 4x to 5x EBITDA on platform deals and 3x to 4x on add-ons.

Seller financing and partner notes

Often 5% to 15% of purchase price, subordinated, 5 to 7 year term, 6% to 8% rate. Useful for cash preservation and to keep the seller economically tied to firm performance during transition.

Red flags that kill CPA deals

Some deals should not close. The patterns that consistently predict post-close failure:

• Quality of earnings reveals 15%+ EBITDA adjustment. Usually from owner compensation, related-party transactions (rent paid to partner-owned real estate), or aggressive revenue recognition on multi-year engagement agreements. A 10% adjustment is normal in CPA. Above 15% the diligence premium typically makes the deal uneconomic.
• Top 5 clients exceed 35% of revenue. Especially when one or more are founder personal relationships. Buyers model 50% loss of these revenues post-close and it usually kills the deal.
• Partner book of business is concentrated in one partner with no succession. If the founder personally owns 70%+ of client revenue with no transferred relationships, you are acquiring a person, not a firm. The post-close transition risk is typically the largest single risk in CPA M&A.
• Realization rate below 75% on standard rates. Indicates either chronic under-pricing, inefficient delivery, or a culture of write-downs. All three are addressable but require 18 to 36 months of operational work that the buyer must price into the deal.
• Recent peer review findings or PCAOB inspection issues. Attest practice quality problems carry malpractice tail risk and reputational risk. Many platforms will pass on a firm with active peer review remediation in process.
• State board ownership questions unresolved. If counsel cannot confirm the APS will clear in every state where the firm holds a permit, the deal cannot close until it does. Multi-state firms with active practice in CA, NY, IL, TX, and FL require 60 to 120 days of state board work.

The CT Acquisitions perspective

We work both sides of the CPA market: introducing sellers to qualified buyers and sourcing deal flow for institutional buyer networks that have engaged us. Our observations from the last 36 months of accounting M&A:

• The best deals are not the highest-priced. Partners who get the strongest outcomes prioritize buyer fit (partnership culture, second-tier partner treatment, client continuity, brand respect) alongside price. Buyers who credibly signal these commitments win deals that higher bidders lose.
• CAS conversion is the post-close value lever. Compliance-only firms acquired by advisory-led platforms typically grow EBITDA 25% to 50% in 24 to 36 months post-close by converting compliance clients to monthly CAS, virtual CFO, and advisory engagements.
• Independents win on speed below $1.5M EBITDA. Platform buyers are often slower than they signal. In competitive sub-$1.5M EBITDA deals, independent buyers, search funders, and CPA-led roll-ups closing in 90 to 120 days frequently beat platforms on terms.
• Cultural diligence predicts partner retention. The integration failures we have seen are rarely financial misalignment. They are buyers who promised partnership continuity and imposed corporate processes in month three. The buyers who preserve value diligence the second-tier partners and senior managers, not just the founding partner.
• State-level rules matter. CA, NY, IL, TX, and FL ownership rules require thoughtful structuring even within APS. Multi-state firms without specialized counsel consistently encounter avoidable delays.

If you’re a buyer, here’s what we recommend

Whether you are a first-time search fund buyer, an independent sponsor building a CPA thesis, a CPA firm building a regional roll-up, or a PE platform looking for add-ons, the same playbook works in accounting:

1. Write down your thesis in one page. Geography, size, service mix (compliance, CAS, advisory, attest), industry niche, partner profile, hold period. Everything you buy should be defensible against this thesis.
2. Build a deal-flow machine before you need deals. Proprietary sourcing typically outperforms broker-led processes on price and terms. This means direct outreach to founders, relationships with AICPA chapters and state society boards, presence at industry events, and standing relationships with CPA-focused M&A advisors.
3. Underwrite from the partners and senior managers up. The best CPA firms are built on partnership culture and second-tier partner depth. Your diligence should reach into the senior manager group. Your integration plan should start with the people who will be running client relationships in 5 years.
4. Solve for the alternative practice structure early. If you are not a CPA, engage counsel experienced with state board negotiations before you sign your first LOI. The APS is well-trodden but execution-sensitive, and getting it wrong post-LOI can blow up an otherwise clean deal.
5. Do not mistake price for deal quality. Buyers who pay 10x for a platform-grade CPA firm with 50%+ CAS, documented operations, and a deep partner bench typically return capital more reliably than buyers who pay 5x for a founder-dependent compliance shop that looks cheap on paper.

Working with CT Acquisitions as a buyer

We maintain a qualified buyer network of PE platforms, strategic acquirers, family offices, independent sponsors, search funders, and CPA-led consolidators. If your thesis fits the deal flow we see, we are direct, fast, and selective about the introductions we make. We do not run broad auction processes. We match founders to the small number of buyers who are right for their specific firm.

For buyers, this means no wasted time on mis-fit deals, early access to firms that have not gone to market, and a sellers-first reputation that founders trust. We are paid by the buyer at close. Founders pay nothing.

If you are actively acquiring in CPA, set up a 30-minute conversation to walk us through your thesis. We will be direct about whether our deal flow fits.

Frequently asked questions about buying a CPA firm

What multiple should I pay for buying a CPA firm in 2026?

Platform-grade accounting firms with 35%+ CAS or advisory mix, documented operations, and a partner bench command 9x to 12x EBITDA, or roughly 1.3x to 1.6x trailing revenue. Compliance-only firms with founder dependence transact at 4x to 6x EBITDA or 0.8x to 1.1x revenue. CAS and advisory mix is the dominant multiple driver; partner retention and client concentration come next.

How does the alternative practice structure work when buying an accounting firm?

The licensed attest firm stays majority-owned by CPAs and performs all audit and review work. A separate PE-backed holding company owns the non-attest book (tax, CAS, advisory) and employs non-attest staff. A long-term administrative services agreement binds the two. This structure, pioneered by Citrin Cooperman / New Mountain in August 2021, lets institutional capital own the non-attest economics while respecting AICPA and state CPA ownership rules.

How long does it take to close a CPA firm acquisition?

90 to 150 days from signed LOI. Single-state deals close at the fast end. Multi-state firms in CA, NY, IL, TX, and FL require additional time for state board notifications and APS structuring. Add 30 to 60 days for active peer review or PCAOB findings.

Can I buy a CPA firm if I am not a CPA?

Yes, with structure. Non-CPA buyers (search funders, family offices, PE) acquire the non-attest book through an APS and contract with a CPA-owned attest entity for audit and review. Roughly half of all platform CPA deals since 2021 have used this approach. The attest entity remains the licensed practice; you cannot hold yourself out as a CPA firm.

Should I use an SBA loan to buy an accounting firm?

SBA 7(a) works for CPA acquisitions up to $5M. Rates are prime plus 2.0% to 2.75% with 10-year amortization. The constraint is the SBA requirement that the seller exit operationally within 12 months, which conflicts with the multi-year founder transitions common in CPA. For 2+ year transitions, commercial bank or seller financing is usually better.

How do I source CPA deal flow if I am new to the category?

In order of yield: direct outreach to firms identified through state society directories and AICPA membership lists; CPA-focused M&A attorneys and consultants; AICPA Engage, state society meetings, and industry events; specialized M&A advisors (CT Acquisitions among them); and broker-listed deals.

What is the biggest mistake first-time CPA buyers make?

Underestimating partner and senior manager retention. CPA firms run on people, and second-tier partners hold the client relationships. First-time buyers focus on the founder transition and discover in the first 90 days that they did not secure the senior managers and partners who deliver the work. Retention packages and transparent communication before LOI signing are essential.

How does CAS revenue change the value of a CPA firm?

CAS revenue (monthly close, virtual CFO, advisory) commands 9x to 12x EBITDA at platform scale, vs 4x to 6x for traditional compliance. A firm with 50% CAS mix can be worth 60% to 100% more than the same-revenue compliance firm. This is the single largest multiple lever in CPA M&A.

Related resources for buyers

• CPA firm valuations and multiples (seller perspective) useful context on what sellers are being told
• CPA business valuation methodology how revenue and EBITDA multiples are constructed
• How to buy a CPA firm step by step tactical playbook for first-time buyers
• Who buys CPA firms in 2026 PE platforms, strategics, and the full buyer landscape
• All vertical buyer playbooks adjacent professional services and home services categories