Earnouts in M&A: Structure, Dispute Triggers, and Fixes

October 1, 2026 · 9 min read · Capital Markets Law Group, LLP

An earnout pays part of the purchase price after closing, only if the acquired business hits defined targets. It is a standard bridge across a valuation gap, and it is also one of the most common sources of post-closing M&A disputes. The disputes are rarely about honesty; they are about how the earnout was drafted: whose decisions drive the metric, how the metric is measured, and what happens when the business is integrated before the measurement period ends.

Key Rules

Most earnouts run one to three years and use revenue, EBITDA, gross profit, or a customer or product milestone as the metric.
The buyer typically controls the levers that drive the metric (spend, hiring, pricing), which is the structural source of earnout disputes.
A well-drafted earnout specifies the accounting policies used, who prepares the calculation, and how disagreements are resolved.
Integration is the classic earnout killer: once the target's line items are merged into the buyer, the metric may become unmeasurable or inequitable.
Escrow, holdback, and indemnification are separate mechanisms; do not let the buyer's counsel blur them into the earnout.

Why Earnouts Exist

Buyer and seller disagree about the future. The seller believes a product line or customer relationship is about to compound; the buyer is not willing to pay for that belief today. The earnout splits the difference: the seller gets paid more if the belief turns out to be right, and the buyer only pays for performance it can see. That trade is legitimate and it can be structured cleanly. The trouble starts when the drafting leaves open who controls the variables that determine the payment.

The Three Classic Dispute Triggers

Buyer control over the metric. If the earnout is EBITDA and the buyer decides post-closing how much to spend on R&D, marketing, or executive compensation, the buyer can legally steer the metric below target. Sellers should seek covenants requiring the buyer to operate the business consistent with past practice, or to agree on a budget up front.
Accounting interpretation. "EBITDA" is not one number. Revenue recognition, capitalized development costs, and the treatment of one-time items all change the calculation. The earnout should lock the accounting policies to the target's historical practices, with an independent accountant as the tiebreaker.
Integration. If the buyer folds the target into a segment and reallocates shared costs, the target's stand-alone revenue or EBITDA may no longer exist. The earnout should say what happens then: a deemed payment, a pre-agreed reallocation methodology, or acceleration.

Drafting Provisions That Prevent Disputes

Define the metric precisely. Name the accounting policies, the comparatives, and the adjustments that are and are not permitted.
Fix the operating covenants. Spell out how the buyer must run the business during the measurement period: budgets, headcount, spend categories, pricing latitude.
Set the calculation and dispute process. Who prepares the earnout calculation, when it is delivered, what the other side's objection window is, and who resolves unresolved disputes (independent accountant, arbitration, or court).
Address early termination. If the buyer sells the business before the earnout period ends, the earnout should either accelerate or survive the sale in some defined form.
Separate the earnout from indemnification. An earnout is a purchase price mechanism; an indemnity is a risk-allocation mechanism. Merging them invites double-counting arguments in both directions.

How Earnouts Are Paid

Term	Typical structure	Why it matters
Metric	Revenue, EBITDA, gross profit, milestones	Drives who controls the outcome and how easily it can be gamed
Period	1 to 3 years	Long enough to be meaningful, short enough to stay measurable
Capped vs. uncapped	Usually capped; sometimes sliding scale	Buyer's maximum exposure and seller's upside are both fixed
Payment form	Cash, buyer stock, or note	Stock adds valuation, dilution, and registration questions
Dispute resolution	Independent accountant or arbitration	Keeps disagreements out of court and off the deal timeline

When the payment form is buyer stock, the agreement should fix how the stock is valued, whether a collar protects either side, and what registration rights the seller gets if the buyer is public. Those terms determine whether a $2 million earnout is actually worth $2 million.

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This post is general legal information, not legal advice, and it does not create an attorney-client relationship. Questions in this area turn on the specific facts of your matter. Contact the firm for advice on your situation.

Frequently Asked Questions

What Is an Earnout in an M&A Deal?

A contingent payment: part of the purchase price is paid after closing only if the acquired business hits defined targets over a set period. It bridges valuation gaps and keeps sellers incentivized, at the cost of later disputes over whether the targets were met.

What Metrics Do Earnouts Usually Use?

Revenue and EBITDA are the most common, with gross profit, net income, customer retention, and product milestones also seen. The metric should be one the seller can influence and the buyer can measure without discretionary judgments.

How Do Earnout Disputes Usually Arise?

Three ways: the buyer controls spending, hiring, or pricing that drives the metric; the parties disagree over accounting interpretations; or the buyer integrates the business so the target line can no longer be measured cleanly.

How Long Do Earnout Periods Run?

Typically one to three years after closing, long enough for the metric to be meaningful, short enough that the parties and the management team still remember what was agreed.

Can an Earnout Be Paid in Buyer Stock?

Yes, and the LOI or purchase agreement should specify the stock's valuation, whether there is a collar, and any registration rights if the buyer is public, because those terms materially change what the earnout is actually worth.