Earnout

An earnout is a contingent acquisition payment tied to the acquired company hitting post-close milestones over a defined performance period, typically 1 to 3 years. Milestones cover revenue, EBITDA, product launches, customer-retention thresholds, or other operating metrics, and the structure is used to bridge valuation gaps between buyer and seller when the buyer doesn't want to pay up front for value that depends on future performance. It is one of the most-negotiated and least-loved acquisition mechanics, because it transfers performance risk from buyer to seller and gives the seller limited control over the metrics they're now paid to hit.

The typical structure: an earnout represents 10 to 40 percent of total deal value (sometimes more in distressed or pre-revenue deals), spread across one or more milestone tranches tied to specific metrics. The metrics chosen matter enormously: revenue-based earnouts (cleanest but easiest for the buyer to manipulate by changing pricing or comp structure), EBITDA-based earnouts (subject to allocation games such as corporate overhead, transfer pricing, R&D capitalization), non-financial earnouts (product milestones, customer counts, retention thresholds; often less gameable but harder to define cleanly). The structural risk for sellers: once acquired, sellers usually don't control the integration decisions that affect their metrics. The acquirer may reorganize teams, reprice products, redirect engineering, or shift strategy in ways that make earnout targets harder to hit, and disputes over whether those changes were "good faith" land in litigation. Industry studies of earnouts (Shareholder Forum, various M&A practitioners) consistently find that fewer than half of earnouts pay out their full target amount; many pay out partially or not at all. Famous examples that went sideways: Yahoo's acquisition of Tumblr (2013, $1.1B; founder David Karp had a retention package tied to performance milestones that were never hit cleanly). The deals that work tend to have very tightly-scoped earnouts on metrics the seller can clearly control.

What founders get wrong: Trusting the earnout math at the LOI stage without negotiating the operational covenants that determine whether the metrics are achievable. The buyer will integrate in whatever way is best for them; the seller's only protection is contractual covenants requiring the buyer to operate the business in good faith and provide the resources needed to hit the targets. Without those covenants, the earnout is a hope dressed up as a contract.

Related: Acquisition · Definitive Agreement · Exit Strategy · Letter of Intent

FAQ

What is an earnout?
A contingent acquisition payment tied to the acquired company hitting specified post-close milestones (revenue, EBITDA, product launches, retention thresholds) over a defined performance period (typically 1 to 3 years post-close). Used to bridge valuation gaps between buyer and seller.

How much of an acquisition is typically an earnout?
10 to 40 percent of total deal value is the typical range, sometimes more in distressed or pre-revenue deals. The earnout is usually structured as one or more milestone tranches tied to specific metrics, paid over 1 to 3 years.

Do earnouts usually pay out?
Often partially or not at all. Industry studies consistently find that fewer than half of earnouts pay their full target amount. The acquirer typically controls integration decisions that affect the metrics, and disputes over whether changes were good faith land in litigation. Lower-cash-all-cash deals frequently beat higher-headline-half-earnout deals once you probability-weight the earnout.