Earnout Provisions in Business Sales: Metrics, Control, and Dispute Risk

An earnout defers part of the purchase price and ties it to how the acquired business performs after closing. It exists to bridge a valuation gap: the seller believes growth is coming, and the buyer will not pay today for results it has not seen. The structure works only when three things are drafted with equal care — the metric that will be measured, the buyer's freedom to run the business while it is being measured, and the machinery that resolves a disagreement about the resulting number.

Most earnout litigation is not a fight about whether the target performed. It is a fight about what the contract defined performance to mean, and about who was permitted to change the conditions under which performance was measured.

What the earnout is actually doing

An earnout is deferred, conditional consideration. Legally it is a payment obligation subject to a condition precedent; commercially it is a risk-shifting device that moves valuation uncertainty from the buyer to the seller. That transfer is the source of the problem. After closing, the seller carries the risk of a result that the buyer now controls.

That asymmetry is why earnouts should be drafted alongside the rest of the risk-allocation package rather than bolted on at the end. The same agreement that contains the earnout usually contains a set of representations and warranties with their own remedy architecture, including an basket and cap structure. Buyers frequently want the right to set off indemnity claims against unpaid earnout amounts. Sellers usually resist, or accept setoff only for finally determined claims. Whichever way it lands, the point should be decided in the document rather than discovered during the first payment cycle.

Where the buyer is a public company, the terms of the earnout are often readable in the acquisition agreement filed as an exhibit with the U.S. Securities and Exchange Commission. That is a practical drafting resource: the market's current formulations for metric definitions and objection procedures are on the public record. If earnout consideration will be paid in buyer stock rather than cash, securities-law analysis attaches to the instrument itself, which is a separate workstream from the earnout mechanics.

Choosing the metric

Every metric protects one party and exposes the other. There is no neutral choice, only a choice whose failure mode you have thought about.

Revenue-based earnouts generate the fewest measurement disputes and the most economic complaints. EBITDA-based earnouts match the valuation logic and generate the most disputes, because every line between revenue and EBITDA can be argued. A workable compromise is EBITDA with a closed list of permitted and prohibited adjustments, negotiated line by line, rather than a general reference to accounting principles.

Post-closing control and operating covenants

After closing, the buyer owns the business. Absent express restrictions, it may integrate, reorganize, reprice, or redirect it. Operating covenants are the seller's only durable protection, and they must be specific enough to be enforceable.

• Integration risk. The target is folded into a larger unit and the metric becomes unmeasurable. Control: a covenant to maintain separate books and records for the earnout period, with a defined carve-out methodology if integration occurs.
• Cost-allocation risk. Corporate overhead, management fees, or shared-services charges are pushed onto the target's profit and loss statement. Control: cap or prohibit allocations not consistent with pre-closing practice.
• Investment risk. Sales headcount, marketing spend, or capital expenditure is cut, depressing the metric. Control: a minimum spend or headcount commitment for the earnout period.
• Channel risk. Revenue is booked through an affiliate rather than the target. Control: attribution rules covering affiliate and cross-sold transactions.
• Milestone risk. The buyer simply declines to pursue the condition. Control: a commercially reasonable efforts covenant with a defined standard, or a deemed-achievement trigger.

Buyers resist these covenants for a real reason, not merely a tactical one: they constrain the operation of a business the buyer has paid for. The usual landing zone is a short list of specific commitments plus an express statement that, outside those commitments, the buyer has sole discretion. That express statement matters more than sellers expect, for the reason set out next.

The implied covenant and its limits

Every commercial contract carries an implied covenant of good faith and fair dealing. Sellers often assume it will fill the gaps in a thin earnout clause. Under Delaware law — the common reference point for deal disputes, because so many acquisition agreements select it and so many targets are Delaware entities under the Delaware General Corporation Law — the covenant is understood narrowly. It is used to imply a term the parties would obviously have agreed to had they considered the gap. It is not used to override or supplement terms they did agree to.

The practical consequence is uncomfortable for sellers. A clause stating that the buyer has no obligation to operate the business so as to maximize the earnout is generally given effect. Once the contract expressly allocates discretion to the buyer, an argument that the buyer exercised that discretion unfairly becomes much harder to run. Good faith constrains how a discretionary power is used; it does not create obligations the seller failed to negotiate.

Verify before relying: the reach of the implied covenant is a question of governing law, and formulations differ across states. Confirm the standard in the law actually selected by the agreement — not the law of the state where the business happens to sit.

Accounting methodology and the measurement sequence

A metric definition that says "determined in accordance with GAAP" is an invitation to argue. Generally accepted accounting principles permit ranges of treatment, and the buyer will apply its own policies after closing. Better definitions specify a hierarchy: the defined adjustments first, then the target's historical accounting practices, then GAAP — and they attach a worked sample calculation using the most recent full period as a schedule.

1. Period closes

   The measurement period ends. The buyer prepares the earnout statement using the contractual hierarchy, not its own consolidated reporting policies.

2. Statement delivered

   The buyer delivers the calculation with supporting detail. Weak clauses omit the detail requirement, leaving the seller unable to test the number.

3. Access window

   The seller gets books-and-records access and personnel availability for a defined period. Without an express access right, the seller is reviewing a conclusion, not a computation.

4. Objection notice

   The seller delivers a written objection identifying each disputed item and its proposed value. Unstated items are typically deemed accepted.

5. Negotiation period

   The parties attempt resolution for a fixed number of days before any neutral is engaged.

6. Referral

   Remaining disputed items go to the designated neutral accountant, whose authority is limited to the items in dispute.

Deadline discipline: objection windows are short — commonly thirty to sixty days — and are usually drafted as conditions rather than as procedural preferences. A seller that misses the window can find the buyer's calculation contractually final regardless of its accuracy.

Dispute mechanics: who decides what

The most consequential drafting choice is jurisdictional in the private sense: which neutral gets which question. Three forums are typically in play, and disputes about the boundary between them are common enough to be a planning assumption.

The independent accountant is usually appointed as an expert rather than an arbitrator, with authority confined to specified accounting items and often constrained to select a value within the range of the parties' positions. That is efficient for computational questions and a poor fit for anything else. The arbitrator handles broader contractual claims where the parties chose arbitration; the resulting arbitral award is reviewable only on narrow grounds, which is a feature for finality and a problem when the reasoning is wrong. The court hears breach-of-covenant and implied-covenant claims where no arbitration clause applies, with the full discovery apparatus of the Federal Rules of Civil Procedure if the case sits in federal court. If you are choosing between the last two at the drafting stage, the trade-offs are set out in our brief on arbitration versus court.

Two drafting habits reduce the boundary fight. First, define the accountant's mandate by listing the categories referred to it, rather than by referring "all earnout disputes." Second, state expressly that claims alleging breach of the operating covenants are not accounting items. Without that sentence, the parties will litigate about where to litigate before reaching the merits.

Note also what a materiality qualifier cannot do here. Qualifiers narrow representations; they do not soften an arithmetic threshold. An earnout that pays nothing below a target pays nothing at ninety-nine percent of target unless the clause contains a sliding scale. Cliff structures produce the most aggressive behavior on both sides near period end; a linear or tiered payout removes much of that incentive.

Questions the desk gets

Which metric produces the fewest disputes?

Revenue, by a wide margin. It sits at the top of the income statement, so fewer intervening decisions can move it, and it can usually be tested against the buyer's own reported figures. The cost is economic rather than procedural: a revenue earnout can be satisfied through unprofitable sales. Sellers who want profit-linked upside generally have to accept the definitional complexity that comes with it.

Can a seller stop the buyer from restructuring the business?

Not in general terms. Once the sale closes, the buyer owns the enterprise and may reorganize it. What a seller can obtain is narrower and more useful: covenants to keep separate records, limits on charges allocated to the acquired unit, minimum investment commitments, and attribution rules for revenue booked elsewhere. A broad promise to run the business "consistently with past practice" is far weaker than three specific commitments.

Does the implied covenant of good faith rescue a badly drafted earnout?

Rarely. It is a gap-filler, not a rewriting tool. Where the agreement expressly gives the buyer discretion over operations, courts applying Delaware law have generally declined to imply obligations that contradict that grant. The covenant does real work where the contract is silent on a point the parties plainly assumed, which is a much narrower opening than sellers expect.

Is the accountant's determination final?

Usually yes, within its mandate. Expert determinations are typically drafted as final and binding on the items referred, with judicial review limited to whether the expert acted within the scope of the appointment. That is why the scope clause deserves more attention than the selection criteria. An expert who resolves a question outside the mandate creates a second dispute rather than ending the first.

Where the risk actually sits

The risk does not sit in the payout formula. It sits in the definitions schedule, the operating covenants, and the two sentences that decide which neutral hears which question. Draft the earnout by writing the argument you expect to have three years later, then check whether the current language answers it.

Three practical steps follow. Attach a worked sample calculation to the agreement using real historical figures, so the intended methodology is demonstrated rather than described. Keep the seller's information rights explicit — access to books, records, and the people who prepared the statement — because a right to object is worthless without the ability to test the number. And make sure the corporate record supports the deal: approvals, consents, and the authority to bind the entity should be documented as described in our brief on board minutes and written consents, and coordinated with the officer-protection package covered in director and officer indemnification.

This brief is general information from an independent legal publisher, not legal advice, and no part of it evaluates a specific transaction. Deal terms interact, and the same earnout clause behaves differently depending on the surrounding agreement and the governing law. Further material on transaction risk sits in the Corporate Operations & Risk desk.