Earnout Tax Treatment: Contingent Payment Sales Under Section 453
An earnout is part of a business sale price that depends on future results, such as revenue or profit targets in the years after closing. For tax, it is a contingent payment sale reported on the installment method unless you elect out, under Temp. Reg. §15a.453-1(c). You pay tax on each earnout payment as you receive it, generally as capital gain if you sold stock or capital assets, but part of each payment can be recharacterized as interest, and payments that really reward your continued work can be taxed as ordinary compensation.
This page covers the three basis recovery rules, a labeled simple example, imputed interest, and how to keep an earnout from turning into wages. For the bigger picture, see selling a business: tax implications.
What counts as a contingent payment sale
The regulation defines it as "a sale or other disposition of property in which the aggregate selling price cannot be determined by the close of the taxable year in which such sale or other disposition occurs." Earnouts, royalty-style payments on a sold business, and price adjustments tied to future events all fit.
It does not include a payment right that is really a retained interest in the business, a partnership interest or equity. If the "earnout" gives you an ongoing share of the upside like an owner, it may not be a sale payment at all.
Three ways your basis is recovered
How much of each payment is tax-free return of basis depends on the deal terms:
| Deal term | Basis recovery rule | Citation |
|---|---|---|
| Stated maximum selling price (the most you could ever get is known at year-end) | Treat the maximum as the selling price and use a normal gross profit ratio; recompute if the maximum is later reduced | §15a.453-1(c)(2) |
| No maximum, but a fixed period (e.g., "a share of profits for 5 years") | Spread basis in equal annual amounts over the years payments may be received | §15a.453-1(c)(3) |
| Neither | Recover basis evenly over 15 years; the IRS says such deals "will be closely scrutinized" as possibly rent or royalty instead of a sale | §15a.453-1(c)(4) |
If a year's payment is less than the basis allocated to it under the fixed-period or 15-year rules, you generally cannot take a loss until the final payment year (or until the right becomes worthless); the unused basis carries forward.
Simple example: $7 million at closing plus up to $3 million earnout
Simple example. Assumptions: you sell all your company's stock for $7,000,000 cash at closing plus an earnout of up to $3,000,000 over three years, so the stated maximum price is $10,000,000. Your stock basis, including selling costs, is $1,000,000. All gain is long-term capital gain. Married filing jointly with $200,000 of other taxable income each year. 2026 federal brackets and 3.8% net investment income tax, computed with the §1(h)(1) ordering. State tax and imputed interest ignored here.
Gross profit ratio: ($10,000,000 minus $1,000,000) divided by $10,000,000 = 90%.
| Year | Payment | Gain at 90% | Federal tax | NIIT |
|---|---|---|---|---|
| Year of sale | $7,000,000 | $6,300,000 | $1,239,315 | $237,500 |
| Each earnout year, if $1,000,000 paid | $1,000,000 | $900,000 | $159,315 | $32,300 |
Compare electing out. You would report the fair market value of the earnout right in year one; if it were valued at the full $3,000,000 (an assumption; a real valuation would usually be lower), reporting $9,000,000 of gain in year one would cost $1,779,315 federal plus $340,100 NIIT that year, including tax on earnout money you may never receive.
If the earnout comes up short. Suppose only $1,000,000 of the $3,000,000 is ever paid. Under the stated-maximum rule, the ratio is recomputed when the maximum is reduced, for payments in and after that year, and any basis still unrecovered at the end becomes a loss in the final payment year. Installment reporting means you were never taxed on the $2,000,000 you did not get.
Model the timing of your own deal in the calculator.
Imputed interest on earnout payments
Deferred payments on a sale carry interest whether the contract says so or not. For contingent payments, Reg. §1.483-4 applies "even if the contract provides for adequate stated interest." Noncontingent payments are treated as a separate contract, and "each contingent payment under the overall contract is characterized as principal and interest" when it is paid, using rules similar to Reg. §1.1275-4(c)(4).
In practice, part of each earnout payment, discounted back to the sale date at the applicable federal rate, becomes ordinary interest income, and the rest is price. The longer the earnout runs, the bigger the interest slice. See imputed interest and seller financing interest rates and the AFR.
The compensation trap
If you stay on after the sale, the IRS can argue that an earnout is really pay for your services, taxed as ordinary wages rather than capital gain. Factors that point toward compensation:
- Payments stop if you quit or are fired, even without cause.
- Only selling owners who keep working get the earnout; passive co-owners do not.
- Your separate salary is below market for the role.
- The earnout formula tracks your personal performance rather than the business's.
- Earnout amounts are out of proportion to ownership percentages.
Factors that support purchase price:
- Payments go to all sellers pro rata by ownership.
- Employment and earnout are in separate agreements, and the earnout survives termination.
- You have a market-rate employment or consulting contract.
- The earnout reflects business value that was hard to agree on at closing.
For asset sales, how the price is allocated among classes of assets also matters, because payments for equipment can carry §1245 recapture, which §453(i) taxes in the year of sale regardless of when paid. See Form 8594 and purchase price allocation and installment sales of stock and partnership interests.
Earnout vs seller note
| Earnout | Seller note | |
|---|---|---|
| Amount | Uncertain; depends on results | Fixed principal |
| Tax timing | Installment method as paid | Installment method as paid |
| Basis recovery | Special contingent payment rules | Normal gross profit ratio |
| Interest | Imputed on each contingent payment | Stated rate, at least the AFR |
| Risk | Buyer controls the results that drive payment | Buyer credit; often secured |
| §453A interest charge | Applies to large obligations outstanding at year-end | Same |
Many deals combine both. For seller notes in business sales, see seller financing a business.
Bottom line
An earnout is taxed like an installment sale with uncertain payments: you pay as you collect, with basis recovered under the stated-maximum, fixed-period or 15-year rule. Watch for imputed interest inside each payment and keep the earnout clearly separate from any pay for your ongoing work, or capital gain can turn into wages.
Questions to ask your CPA
- Does my earnout have a stated maximum price or a fixed period, and which basis rule applies?
- How much of each earnout payment will be treated as interest under Reg. §1.483-4?
- Should I elect out and report the fair market value now, or use installment reporting?
- How do we document that the earnout is price, not compensation?
- Does the asset allocation create §1245 recapture taxed in the year of sale?
- Will the §453A interest charge apply to my deferred payments?
Run your own numbers. Compare a cash sale, seller financing and a structured installment sale side by side, free.
Educational only, not tax, legal or investment advice. Examples are illustrative. Have your CPA or tax attorney review your facts before you act. Hans Goldstein is a licensed insurance agent (CA Insurance License #4273294) and is not a CPA or attorney. He is paid a commission only if a structured installment sale is funded; seller financing pays him nothing. Disclosures.