Selling an Accounting Practice: How the Taxes Work When the Price Rides on Client Retention

What a buyer is actually paying for in an accounting firm

An accounting firm has few hard assets. The buyer is paying for the expectation that your clients will keep sending their returns, payroll and bookkeeping to the new owner. For tax purposes that expectation is goodwill and a customer-based intangible (the client list), both listed as Section 197 intangibles in IRC 197(d)(1). In your hands they are capital assets or Section 1231 property, so the gain is long-term capital gain once you have held the practice more than a year.

Because you built the list yourself, its tax basis is usually zero, which means nearly every dollar allocated to goodwill is gain. The allocation is set on Form 8594 under the residual method of IRC 1060, and you and the buyer should file matching numbers. The purchase price allocation page walks through the seven asset classes.

The retention clause, and why it changes how the gain is reported

Very few accounting practices sell for a fixed price paid in full at closing. The common shape is a down payment, then one or two later payments sized by the fees the buyer actually collects from your clients. If 10 of your 200 clients leave, the price drops.

The IRS treats that as a contingent payment installment sale, governed by Treas. Reg. 15a.453-1(c). Which basis-recovery rule applies depends on how the contract is written:

• Stated maximum price (for example, "up to $1,200,000"): you report as if the maximum will be paid, under Reg. 15a.453-1(c)(2). If retention falls short, the gross profit ratio is recomputed for the later payments.
• No maximum, but a fixed payout period (for example, a percentage of collected fees for 36 months): basis is recovered in equal slices over the period, under Reg. 15a.453-1(c)(3).
• Neither: basis is spread over 15 years and the IRS looks hard at whether the deal is a sale at all, under Reg. 15a.453-1(c)(4).

With a zero-basis practice the basis rules matter less than the timing: you pay tax on each payment as it arrives instead of on the whole price in the year of sale. See contingent payment installment sale for the mechanics and Form 6252 reporting.

Worked example: one check versus a retention payout in Illinois

Our Illinois couple sells a $1,200,000 practice. Paid all at closing, the sale adds $316,575 of tax in 2026, an effective rate of 26.4% on the gain. Paid 30% at closing and the rest in two retention payments, the same full price produces $237,498 of tax across 2026 to 2028, or $79,077 less. The difference comes from keeping more of the goodwill gain inside the 15% federal bracket (20% applies above $613,700 of taxable income for joint filers, Rev. Proc. 2025-32, 2026) and out of the alternative minimum tax. Illinois takes a flat 4.95% either way (Illinois Department of Revenue, rate in effect since July 1, 2017), so the state cost does not change with timing.

Two items cannot be spread. The $20,000 of depreciated equipment is Section 1245 recapture, reported in the year of sale under IRC 453(i). The work in process and the non-compete are ordinary income paid at closing in this example. The full federal rate table lives on the capital gains hub, and the Illinois rules are on the Illinois page.

Work in process, receivables and the non-compete

A cash-basis firm has never reported its unbilled time or its open invoices as income. When the buyer pays you for work in process, that payment is ordinary income, because fees for services are not capital assets under IRC 1221(a)(4). Many sellers simply keep their receivables and collect them as normal fee income.

The non-compete is the other ordinary income line. Buyers of accounting practices want one because the seller's relationships are the asset. A buyer amortizes goodwill and a non-compete the same way, over 15 years under IRC 197, so it is often indifferent to the split. You are not: every dollar moved from goodwill to the covenant moves from a top federal capital gain rate of 20% to an ordinary rate of up to 37% (Rev. Proc. 2025-32, 2026). Keep the covenant's value tied to what a real competitor could take, and keep any paid transition work (introducing the buyer, reviewing returns in the first busy season) in a separate consulting agreement at a market rate.

Personal goodwill when the practice is a corporation

Many older firms operate as professional corporations. If the corporation is a C corporation and it sells the goodwill, the gain is taxed once inside the corporation and again when the cash comes out to you. The escape route is personal goodwill: client loyalty that belongs to you, not the entity, sold by you directly.

The leading case is about accountants. In Norwalk v. Commissioner, T.C. Memo 1998-279, the Tax Court held that the client relationships of two CPAs belonged to them personally because they had no non-compete or employment agreement with their own corporation. The reverse is also true: if you signed an employment agreement or covenant with your own professional corporation, the goodwill is likely the corporation's. The personal goodwill sale page and the C corporation double tax page show the two outcomes side by side.

Sharing client tax information during the sale

Accountants carry a disclosure rule that other sellers do not. IRC 7216 penalizes a return preparer who discloses or uses client tax return information without consent. The regulations carve out the sale itself: under Treas. Reg. 301.7216-2(n), a taxpayer list may be transferred in conjunction with the sale of a tax return preparation business, and due diligence before the sale is covered when it is done under a written agreement that requires confidentiality and bars any other use of the information. Sign that agreement before a buyer sees a single client file.

Selling to an employee or partner on a note

Internal buyers, such as a senior manager or a junior partner, rarely have the cash, so the seller often carries part of the price as a note. That is a classic seller financing deal and it spreads the gain the same way as the retention payout. Protect yourself the way a bank would: a meaningful down payment, a UCC lien on the practice assets, a personal guarantee from the buyer, interest at or above the applicable federal rate, acceleration on default or on a resale of the practice, and annual financial statements from the firm. If the buyer is your child or another related person, read the resale and depreciable-property rules first on the related-party installment sale page.

For most firms the interest charge on large installment notes will not apply: it only reaches notes above $5,000,000 outstanding at year end (IRC 453A(b)(2), not indexed for inflation).

Choosing the shape before the letter of intent

The tax result of an accounting practice sale is mostly decided by three documents: the allocation schedule, the retention or earn-out clause, and the non-compete. Once a letter of intent is signed, buyers rarely reopen them. Model the cash, payout and seller-note versions first, including your other income in each payout year, then negotiate the version that leaves you the most after tax and the risk you can live with. The earn-out and installment sale pages cover the trade-offs in more depth.

Get the Big Sale Tax Analysis to see your firm's numbers modeled side by side before you commit.

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