An earnout is a deferred payment structure in a business sale where the seller receives additional consideration after closing, contingent on the business hitting agreed-upon performance targets (typically revenue or EBITDA milestones). The tax treatment of earnout payments depends on the structure, they can be taxed as capital gain, ordinary income, or a combination of both, making earnouts one of the more complex financial planning elements of a business exit.
Buyers use earnouts to bridge a valuation gap, when the seller believes the business is worth more than the buyer is willing to pay upfront. The earnout says: 'If the business performs as you claim it will, you'll be paid the difference over time.' This is common in service businesses where value is tied to the owner's continued involvement.
The tax treatment of an earnout isn't automatic. If the earnout is structured as part of the purchase price for the business (a contingent payment sale), the IRS generally allows the seller to treat earnout payments as capital gain as they're received, using the installment method under Section 453. However, if the earnout payments are tied to your continued employment or consulting work for the buyer, the IRS will recharacterize them as ordinary income (compensation), not capital gain.
This distinction is critical. An earnout tied to revenue the business generates is capital gain. An earnout tied to your continued involvement, especially if you signed an employment agreement, is likely ordinary income taxed at up to 37%. Negotiating the earnout structure and its relationship to any post-closing employment arrangement requires coordinated input from your transaction attorney and CPA.
Earnouts also create income planning complexity in retirement. You may close the deal at 62 and receive earnout payments through 65 or 67, creating higher-than-expected taxable income in those years. This affects Social Security timing decisions, IRMAA thresholds, Roth conversion opportunities, and Medicare enrollment planning.
Key facts
- Earnouts tied to business performance (not personal services): generally taxed as capital gain under the installment method
- Earnouts tied to your continued employment or consulting: recharacterized as ordinary income, taxed at up to 37%
- Earnouts can affect IRMAA thresholds for Medicare premiums in years received
- Earnout payments can complicate Social Security timing, income from earnouts doesn't count as 'earned income' for Social Security purposes
- The contingent sale rules under Section 453 determine how earnout basis is allocated across payments if the total amount is uncertain
Should I negotiate against an earnout as a business seller?
Generally, yes, sellers prefer more upfront cash and less contingent consideration. Earnouts are uncertain, expose you to buyer management decisions that affect performance targets, and can create cash flow gaps in early retirement. If you must accept an earnout, negotiate a short earnout period (12-24 months), simple metrics you can verify, and a cap on post-closing employment requirements.
How does an earnout affect my retirement income plan?
Earnout payments create lumpy, hard-to-predict income in your first years of retirement. We model earnout scenarios into your income plan, showing best-case, base-case, and no-earnout scenarios, and structure your other income sources (investments, Social Security timing) to hold up regardless of whether the earnout pays out.
