Private equity owned CPA firms: why advisory growth matters and where referrals fit

Why private equity is buying into accounting firms

Investors are drawn to CPA firms because compliance work recurs and client relationships last for years. Sellers typically cite succession planning and the cost of technology and hiring as reasons to bring in outside capital, though the motives differ from firm to firm and this page does not rely on any single transaction.

Once an investor is in, the firm's plan starts to look like any other private equity plan. McKinsey's 2026 global private markets report says multiple expansion and cheap leverage, which accounted for 59 percent of private equity returns between 2010 and 2022, have faded, so operational value creation is now likely the primary source of returns. In an accounting firm, operational value creation mostly means growing service lines with better margins and less seasonality than compliance work. That is advisory.

How the alternative practice structure works

Most of these deals use an alternative practice structure (APS), which splits the firm in two so outside investors can own part of the business without owning the attest practice.

In practice the structure usually works like this:

1. Partners sell the non-attest business to the investor-backed company and often keep equity in it.
2. The attest firm stays owned by CPAs to the extent state accountancy rules on firm ownership require; those rules differ by state.
3. Most staff are employed by the services company and provided to the attest firm under the services agreement.
4. Growth targets, pricing and add-on acquisitions are set at the holding company, which is where advisory expansion gets planned and funded.

Why advisory carries the growth plan

Advisory is where an investor-backed firm can grow without adding the same volume of credentialed, deadline-bound hours. Seen from the owner's side, the main revenue lines compare like this.

For partners and directors, this usually shows up as advisory targets per partner or per client and steady pressure to find services that existing clients will actually buy. That is where clients with years of operational records come in.

Independence checks before any referral income

Referral income is the quickest advisory-adjacent line to add, and the one most likely to run into attest independence. The AICPA's Commissions and Referral Fees Rule (ET 1.520) bars a member in public practice from accepting a commission for recommending a product or service to a client when the member or the firm also performs an audit, a review, certain compilations or an examination of prospective financial information for that client, and requires permitted commissions and referral fees to be disclosed; see the AICPA Code of Professional Conduct. Compensation for introducing a client to a third party's service can fall under this rule, so ask your ethics partner how it is classified.

Contingent fees carry a parallel restriction. As the NYSSCPA explains, a fee that depends on achieving a specific result cannot be charged to a client for whom the firm performs those attest services. Firms that audit SEC registrants also answer to the SEC's auditor-independence rules, a separate regime from the AICPA Code, as SEC staff correspondence with the AICPA ethics committee reflects. State law sits on top: some states adopt the AICPA rule by reference, as Kansas does in K.A.R. 74-5-103, while others write their own.

In an APS, the analysis has to cover both entities and the people shared between them.

This is general information, not legal, tax or financial advice. Confirm with your own counsel, ethics partner and state board before acting.

Where data licensing introductions fit in an investor-backed advisory line

Investor-backed firms tend to serve many mid-market operating companies, and some of those clients hold years of operational records that AI labs and data buyers license. Introducing those clients to SourceX is a narrow advisory adjacency: the firm spots the fit and makes the introduction, and the company works with SourceX on the inventory, rights review, pricing, contracting and delivery. The firm never exports, uploads or describes confidential client records.

Clients worth screening share a profile:

• Non-attest clients, or clients the ethics review has cleared in writing, since that screen comes first
• US operating companies that reached 50+ full-time employees at peak (contractors excluded)
• A multi-year operating record spread over email, chat, CRM, finance, support and engineering systems
• Clear rights to license what the company created, and a sponsor at owner or executive level

Partners earn 25% of the eligible platform fees SourceX actually collects from the referred company's licensing deals, capped at $100,000 per referred company. Rewards are payable only after the buyer pays and SourceX receives its fee, and no reward is guaranteed. The reward is a share of SourceX's fee, so the client's proceeds are untouched.

The guide to new revenue streams for accounting firms compares this line with the alternatives, and the agenda template for annual advisory meetings shows where the topic fits in a client conversation.

What firm leaders should decide first

1. Which entity may receive referral compensation, and how it is booked, so the revenue lands where the operating plan expects it.
2. An attest-client screen run against the attest firm's engagement list before any introduction.
3. Client disclosure wording, and when it is delivered, preferably in writing before the introduction.
4. Who approves each introduction, typically the relationship partner plus the ethics or risk partner.
5. How introductions are logged in the CRM, so the firm can show its screen was applied.
6. When the policy is reviewed, at least annually and whenever the structure changes.

The CPA firm referral fee policy template turns these decisions into a written policy.

Limits and open questions

• Reliable public figures on deal values and terms for CPA firm investments are uneven, and this page does not depend on any particular firm's numbers.
• Independence in an APS is fact-specific; how the two entities share people, leadership and systems can change the answer.
• State rules apply where each CPA is licensed and can be tighter than the AICPA Code.
• Investor-backed firms often add house policies on third-party compensation that go beyond professional rules.

Next step

Ask your ethics partner which clients are eligible, then screen the rest against the who qualifies criteria and the company fit checker. Once the policy is signed off, register as a partner. For the wider picture, the partner page for accountants covers how other firms approach introductions.