Start from the default position
An earnout converts a certain payment into a claim against a business you no longer control, measured by figures the buyer computes, over a period during which the buyer makes every operating decision.
Stated that way, the default position is obvious: prefer not to. In a competitive process with several credible bidders, a seller should usually be able to trade the earnout away for a lower but certain headline number, and frequently that trade is worth taking even at a meaningful discount.
The cases where an earnout is the right answer are narrower than how often they appear.
When it does bridge something real
A real valuation gap, where buyer and seller hold defensible but different views of the forecast, and where the difference turns on something that will be settled quickly and observably. A pending contract renewal, a product launch with a known date, a regulatory decision.
A business whose recent growth is real but short-lived in evidence. Two quarters of a new trend is not enough for a buyer to underwrite and may be entirely sound.
A transaction where the seller is staying and wants the upside. This is the strongest case, because the person whose performance drives the metric is the person receiving the payment.
Where none of those apply, an earnout is usually a device for closing a gap in conviction rather than a gap in value, and it transfers risk to the party least able to manage it.
Choosing the metric
Revenue is the most common in technology deals and the most defensible, because it is the hardest for a buyer to reshape after completion. Its weakness is that it ignores profitability, and a revenue-only earnout can push a seller who stays toward signing business at any margin.
EBITDA aligns with value creation and is the most manipulable. Cost allocation, group charges, integration expense and accounting judgement all move it, and every one of those is under the buyer's control after completion. If EBITDA is the metric, the definition needs the same care as a working capital definition, with exclusions listed explicitly.
Annual recurring revenue or bookings suit subscription businesses and are usually the best compromise. They track the thing that drives value, and they are relatively hard to distort.
Product or customer milestones work where the acquisition is fundamentally a technology purchase and the question is whether something ships or a named account signs. They are binary, which removes most of the argument.
Whatever the metric, keep the measurement period short. One to two years. Beyond that the business has been integrated to the point where the standalone figure is an accounting construct rather than a measurement of anything.
What the seller has to negotiate
Operating covenants requiring the buyer to run the business consistently with past practice during the earnout period, with specifics rather than generalities. Sales headcount maintained. Pricing not changed unilaterally. The product not merged into another line.
Anti-manipulation language prohibiting actions taken with the purpose of reducing the payment. Useful, though hard to enforce, because intent is difficult to prove.
Acceleration on defined events. If the buyer resells the business, materially reorganises it, or terminates the seller's employment without cause, the earnout pays in full. This is the single most valuable protection available, because it removes the buyer's incentive to engineer a miss.
Information rights. Monthly or quarterly reporting on the metric, and audit rights over the calculation. A seller who first sees the number when the payment is refused has no practical remedy.
Security. An escrow, a letter of credit or a parent guarantee, particularly where the acquiring entity is a special purpose vehicle with no assets of its own.
A dispute mechanism naming an independent accounting firm with binding authority and a defined timetable.
What buyers should watch
The mirror image. A revenue-only earnout invites unprofitable business. A metric measured on the standalone entity discourages the integration that created the rationale for buying it. An earnout that requires the acquired team to be left alone for two years may cost more in delayed synergy than it saves in purchase price.
Buyers who structure earnouts to be difficult to achieve usually find the cost arrives elsewhere, in the departure of the people they were trying to retain.
How it usually ends
Most earnouts pay out partially or not at all. Some of that is genuine underperformance. A good deal of it is that the business the earnout measures stops existing in recognisable form within a year of completion.
Price that reality into the decision. If the earnout is worth thirty percent of the headline consideration, assume a materially lower expected value and ask whether the certain portion alone is a price you would accept. If it is not, the negotiation is not finished.
Editorial Team · Published for orientation, not as advice on a specific transaction. Any figure cited is orientation, not a valuation. See market notes.