Earnout: What It Is, How It Works, and How to Structure One
An earnout is a deferred payment in a business acquisition that is contingent on the acquired business hitting specific performance targets after closing. The buyer pays part of the purchase price upfront and commits to paying additional amounts later — but only if the business performs as the seller projected.
Earnouts are used to bridge valuation gaps. When a buyer and seller disagree on what the business is worth — usually because the seller believes earnings will grow but the buyer isn't willing to pay for speculative future results — an earnout lets both parties act on their own view of the future.
How Earnouts Work
An earnout has four core elements:
- Metric: the financial measure that triggers payment (revenue, gross profit, EBITDA, or specific customer counts)
- Threshold: the performance level the business must hit to trigger earnout payments
- Payment: how much is paid if thresholds are met — often a sliding scale or binary trigger
- Period: how long performance is measured (typically 1 to 3 years post-close)
Example: A $1.2M Acquisition With an Earnout
A buyer and seller agree on a base price of $1,000,000 paid at closing, plus an earnout:
- If revenue in Year 1 exceeds $600,000: seller receives $100,000
- If revenue in Year 2 exceeds $650,000: seller receives $100,000
- Maximum total earnout: $200,000 (bringing total deal value to $1,200,000)
The buyer is protected: they only pay the full $1.2M if the seller's projections actually prove out. The seller is protected: if the business does perform, they get paid for it.
Choosing the Right Metric
Revenue is the most seller-friendly metric because it's harder for a buyer to manipulate. EBITDA is more buyer-friendly because the buyer controls operating expenses post-close and can increase costs (new hires, marketing) that reduce EBITDA without hurting the business. Gross profit is often the most balanced choice — it captures top-line performance without being affected by corporate overhead decisions.
Avoid vague metrics like "customer satisfaction" or "growth" without precise definitions. Every earnout word ends up in front of an arbitrator eventually.
Buyer Risks
Buyers face the risk that a seller who stays involved post-close manages the business to hit the earnout metric at the expense of long-term health — a phenomenon called "sandbagging." A seller might defer expenses, accelerate revenue recognition, or make short-term decisions that boost the metric but damage the business.
Seller Risks
Sellers face the risk that the buyer changes the business in ways that make the earnout unachievable — cutting marketing, entering new markets, or raising prices in ways that depress the metric. Sellers should insist on language that requires the buyer to operate the business in the ordinary course, maintain key employees, and not make material changes without seller consent during the earnout period.
Earnout Disputes
Earnouts are the most litigated provision in small business M&A. The best protection is precision in drafting: define every term, specify the accounting methodology, agree on audit rights, and include a dispute resolution mechanism (usually binding arbitration with a neutral accountant). Any ambiguity about how the metric is calculated will be exploited.
Deal-Model Context
An earnout is useful when buyer and seller disagree about future performance. It can bridge a valuation gap by making part of the price contingent, but it also creates post-close measurement, control, and dispute risk.
Model an earnout separately from guaranteed purchase price. If the payment depends on revenue, EBITDA, gross profit, customer retention, or contract renewal, show the formula, timing, cap, and downside scenario. Do not treat contingent money as certain funding.
Buyer Diligence Questions
Strong earnouts use objective metrics, clean accounting definitions, short measurement periods, caps, and clear dispute procedures. Weak earnouts depend on vague ideas like effort, growth potential, or buyer-managed decisions that the seller cannot verify.
This term connects to seller financing, reps and warranties, LOIs, and customer concentration. Ask whether the earnout reduces cash at closing, whether it affects seller motivation during transition, and whether the metric can be manipulated after closing.
Practical Review Checklist
Before relying on Earnout: What It Is, How It Works, and How to Structure One in an acquisition model, turn the term into a written assumption. State what source document proves it, what dollar amount or risk category it changes, and whether it affects purchase price, cash at closing, debt service, working capital, legal exposure, or post-close operations. That step makes the concept auditable instead of merely descriptive.
For buyer diligence, collect at least one primary source document, one seller explanation, and one downside case. If the source document is missing, keep the assumption out of the base case. If the downside case changes DSCR, working capital, customer retention, or transition risk enough to threaten closing, address it through price, seller financing, escrow, earnout, indemnity, or a closing condition.
When using AcquireCalc, enter the verified number first, then test the seller's number and a conservative number. The spread between those cases shows whether Earnout: What It Is, How It Works, and How to Structure One is a minor definition, a negotiation point, or a risk that should change the structure of the deal.
Related Terms
- Seller financing — a non-contingent deferred payment; different from earnout
- Deal stack — how earnouts fit alongside other funding layers
- Reps and warranties — separate protections covering what the seller disclosed
Sources & Further Reading
- International Business Brokers Association (IBBA) — industry standards for deal structuring