An earnout can bridge a disagreement about future performance, but it also creates a measurement problem. If buyer and seller mean different things by revenue or profit, the headline purchase price conceals a future dispute. Define the measurement process before negotiating the maximum payout.
Choose a metric both parties can reproduce
A useful metric has a clear source, measurement period, and calculation method. Revenue may look simple, but the agreement still needs to address recognition timing, refunds, credits, uncollected invoices, related-party sales, and work performed across the measurement boundary. Profit metrics introduce additional cost-allocation questions.
Have the accountant produce a sample calculation from historical records. Ask both sides to calculate the same period independently using the proposed definition. Differences reveal ambiguity while there is still time to fix it.
Use an example that includes an adjustment
Suppose a fictional proposal pays the seller 20% of eligible revenue above $1 million, subject to a $100,000 cap. Reported revenue is $1.4 million. The preliminary payout is $80,000. If $100,000 of that revenue must be excluded under the agreed definition, eligible revenue is $1.3 million and the payout becomes $60,000.
The $20,000 difference comes from the definition, not the percentage. State the treatment of the disputed category directly rather than relying on a broad label such as ordinary accounting practice.
Match responsibility with control
List the decisions that affect the metric: pricing, staffing, marketing, credit terms, product changes, customer allocation, and shared overhead. Identify who controls each after closing. The seller may depend on buyer decisions; the buyer may need freedom to integrate the business. Those interests should be addressed explicitly through the transaction documents.
For a profit-based metric, test what happens when the buyer hires a replacement manager or allocates central-office costs. For a revenue-based metric, test whether low-margin discounts could increase the payout while reducing the business's cash. Neither metric is automatically fair in every situation.
Design reporting and dispute handling
Agree on reporting frequency, supporting records, delivery deadlines, review rights, objection periods, and how a calculation dispute will be resolved. Ask counsel to distinguish an accounting disagreement from a broader contractual dispute. Do not leave the process to an informal promise to work it out later.
The buyer should model the maximum payout and its due date in the cash forecast. The seller should evaluate the uncertainty of contingent proceeds. Both should obtain transaction-specific tax and legal advice on the structure.
Use the worksheet below with the earnout field guide. Its purpose is to surface questions for the transaction team, not to supply contract language.
Download the working checklist
Download the acquisition earnouts: define the measurement before the price worksheet (CSV). Fill it with verified information; blank cells identify work still to be done.