Two clocks: seasonal tax vs. recurring advisory
Every accounting firm runs on two different revenue clocks, and buyers price them very differently. Seasonal tax work, the 1040 rush, is real income but arrives in a narrow window and often follows the individual preparer; if clients came for "my CPA," they may leave when that CPA does. Recurring work, monthly bookkeeping, client accounting and advisory services (CAAS), quarterly reviews, payroll, is the opposite: predictable, embedded in the client’s operations, and hard to unwind. As firms shift their mix toward recurring advisory, the multiple climbs, because the buyer is purchasing a subscription base rather than a to-do list that resets every January.
What buyers check first
- Recurring vs. seasonal fee mix. The clearest driver of durability and multiple.
- Client retention and concentration. Historical attrition and whether any client or industry dominates the book.
- Partner / owner dependence. Whether relationships and signing authority transfer, or walk out the door.
- Realization and staff continuity. Billed-vs-collected rates and whether the team stays post-close.
A tax season is income. A monthly bookkeeping book is an asset. Buyers pay for the second.
Retention-based deal structures
Accounting is one of the few sectors where the purchase price is routinely tied to client retention after closing. Because the risk is that clients leave with the departing owner, many practice sales use a retention clawback or a multi-year earnout: the seller is paid in full only if a defined percentage of the fee base stays through a transition period, often with the seller staying on to hand off relationships. That structure is why the headline multiple and the cash actually received can diverge, and why retention history is diligence item number one.
Read the retention clause
In accounting deals the multiple is often contingent. Model what you actually pay if 10 to 20% of the book leaves in year one, because a retention-adjusted price is the real price.
Sources
- BizBuySell, Accounting & Tax Practice Valuation Benchmarks
- NCS Global, How to Value a CPA Firm (2025)
- FirmLever, CPA Practice Valuation Guide (2025 to 2026)
- Auxo Capital Advisors, Accounting Firm M&A Multiples (2026)
Accounting Firm valuation multiples, FAQ
Both. Buyers price on SDE/earnings (about 2.3× in 2026, with a 1.8×, 3.25× range) and cross-check against the old rule of thumb of roughly 1× annual recurring fees. The two should agree; when they don’t, mix and retention explain the gap.
Recurring bookkeeping and advisory (CAAS) work is predictable, embedded in the client’s operations, and harder to leave. Seasonal 1040 work is concentrated in a few weeks and often follows the individual preparer. Durable, year-round fees reduce buyer risk, so they earn the top of the SDE range.
Because the core risk in buying a practice is that clients leave with the departing owner. Sellers are commonly paid via a retention clawback or multi-year earnout, receiving full value only if a set share of the fee base stays through the transition. It aligns both sides and makes retention history the most important diligence item.
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