Earn-outs that work: structuring contingent consideration both sides can live with

An earn-out is a promise to pay part of the purchase price later if the business hits defined targets. It usually appears when buyer and seller disagree about the future: the seller points to a strong pipeline or a recent contract win, the buyer points to a thin track record. Deferring part of the price to see who was right is a reasonable compromise in principle. In practice, earn-outs are among the most frequently disputed provisions in private company acquisitions.

Most of those disputes trace back to a few decisions made, or not made, when the earn-out was drafted. The goal is not to avoid earn-outs, but to write one that both sides can measure without an argument.

Use an earn-out for the right gap

Earn-outs work best when the disagreement is about a specific, observable outcome: renewal of a large contract, a product launch, a regulatory approval, or revenue from a new customer segment. They work poorly as a general hedge against a buyer’s skepticism about the whole business. If the gap between bid and ask is more than a modest portion of the price, an earn-out often just postpones the disagreement into the first year of ownership, when the seller no longer controls the business.

As a rule of thumb, sellers should value contingent consideration at a meaningful discount to its face amount. The money is later, uncertain, and depends on decisions someone else will make. A deal with a lower headline price and more cash at close is often worth more than it looks.

Choose a metric that resists manipulation

The choice of metric shapes almost every later argument. Each common option has a trade-off.

• Revenue is the easiest to measure and the hardest for a buyer to influence through cost allocations, which is why sellers usually prefer it. Buyers worry it rewards growth at any margin.
• Gross profit sits in the middle: it captures pricing discipline without exposing the seller to corporate overhead.
• EBITDA aligns most closely with how the buyer valued the business, but it is also the metric most affected by integration costs, shared services charges and accounting choices after closing.
• Non-financial milestones, such as a contract signature or a certification, are binary and clean, which makes them attractive when they genuinely drive value.

If EBITDA is the metric, the agreement should list what is excluded: transaction costs, integration expenses, management fees, allocated corporate overhead, and any costs the buyer chooses to add. A worked example attached as an exhibit, showing how the number would have been calculated for the last historical year, prevents many disputes before they start.

Define the accounting, not just the target

The earn-out should be measured using the same accounting principles, applied consistently, that produced the financial statements on which the price was based. Buyers frequently move acquired businesses onto their own revenue recognition policies, close calendars or cost allocation methods. Each change can shift the result without anyone acting in bad faith. A clause that says “in accordance with GAAP” is not enough, because GAAP permits a range of choices.

A clause that says “in accordance with GAAP” is not enough, because GAAP permits a range of choices.

Operating covenants and the seller’s protections

Once the deal closes, the buyer runs the business. Sellers reasonably worry that a buyer might redirect customers, cut sales headcount, or integrate the company so fully that its results can no longer be isolated. Buyers reasonably resist being told how to manage an asset they just paid for. The usual compromise is a short list of specific covenants rather than a general promise to maximize the earn-out.

• Maintain separate books or a reporting segment sufficient to calculate the metric.
• Do not take actions with the primary purpose of reducing or avoiding the earn-out.
• Maintain a defined level of sales or operational resources, where that level matters to the target.
• Accelerate some or all of the earn-out if the business is sold, the buyer materially breaches its covenants, or the seller is terminated without cause.
• Provide periodic reporting, with access to the underlying records.

Courts generally read earn-out language as written, and an implied duty of good faith offers limited protection. If a protection matters, it should be in the agreement.

Structure the payout curve

All-or-nothing targets create sharp incentives and sharp disputes: missing a threshold by a small amount costs the seller the entire payment. A sliding scale, with payments beginning at a floor and rising linearly to a cap, reduces the stakes of any single accounting judgment. Multi-year earn-outs benefit from catch-up provisions, where a strong second year can recover a shortfall in the first, and from cumulative measurement where that better reflects the business cycle.

Duration matters too. One to three years is typical. Longer periods increase the chance that the buyer’s strategy, the market or the seller’s role will change in ways nobody anticipated when the deal was signed.

Payment mechanics, security and taxes

Earn-out payments are typically unsecured obligations, and if the buyer has senior lenders, they are frequently subordinated to that debt. Sellers should understand any conditions under which a lender can block payment, and should consider whether a guarantee from a parent entity or a portion held in escrow is appropriate. Buyers often seek a right to offset indemnity claims against earn-out payments; sellers can limit that right to claims that are finally determined rather than merely asserted.

Tax and accounting treatment deserves early attention. If payments are conditioned on the seller remaining employed, they may be treated as compensation rather than purchase price, with very different tax consequences for the seller and different accounting for the buyer. Installment sale treatment may also be available. These questions belong with tax counsel before the structure is agreed, not after.

Disputes

Finally, specify a process. The buyer delivers an earn-out statement within a set number of days after each period; the seller has a defined window to review the records and object; unresolved items go to an independent accounting firm acting as an expert, limited to the disputed items and bound by the agreement’s definitions. This is faster and cheaper than litigation and keeps the argument on numbers rather than motives.

A well-drafted earn-out is one where both parties could calculate the payment independently and arrive at the same number. If that test cannot be met at signing, the structure is not finished.