Earnout Valuation Disputes

An earnout valuation dispute erupts when a buyer and seller disagree over whether the acquired company met the financial milestones that determine the final acquisition price. These disputes arise because earnouts tie payment to forward performance—and forecasts diverge from reality.

Why earnout definitions breed disputes

An earnout is contingent consideration—extra cash the buyer pays only if the acquired business hits agreed targets. The appeal is obvious: seller gets upside if the business thrives; buyer caps exposure if it doesn’t. But the definition must specify exactly what “hits the target” means.

In practice, most earnout agreements are loose. They reference “revenue” or “adjusted EBITDA,” but leave room for interpretation on what counts as revenue (do returns reduce it?), which costs adjust EBITDA (severance, legal fees, interest?), and whether the buyer’s integration decisions—new pricing, layoffs, overhead—affect the calculation. The buyer typically controls the accounting; the seller has only contractual rights to object.

The two core sources of disagreement

Accounting method divergence. One earnout clause says “EBITDA as calculated under GAAP,” but the seller’s historical financials used non-GAAP metrics. Another refers to “standalone EBITDA,” yet post-close, the buyer consolidates the division with corporate overhead, raising the question of which overhead allocates to the acquired unit. The seller expected clean EBITDA; the buyer now deducts $2 million in shared corporate costs the seller never bore.

Operating decisions that affect results. A seller negotiates an earnout tied to revenue growth. On day one, the new owner raises prices 15 percent; revenue drops 20 percent because customers flee. Did the buyer sabotage the earnout on purpose, or make a legitimate business decision? Or the buyer axes the sales team for cost reasons; revenue plummets. The contract may have language like “the buyer shall operate the business in the ordinary course,” but what counts as ordinary is contested.

Common gaming tactics

Accounting choices. The buyer delays revenue recognition, records customer refunds, or writes off obsolete inventory—each reducing the reported number. The seller claims these were unusual and should be added back. Meanwhile, the buyer insists it’s just sound conservative accounting, same practice it uses company-wide.

Cost allocation. The earnout measures “adjusted EBITDA.” The buyer then assigns head-office IT, HR, or legal costs to the acquired unit’s P&L. These costs may never have appeared in the seller’s historical model. The contract didn’t explicitly exclude them, so the buyer claims they’re legitimate operating costs.

Timing shifts. Revenue is recognized in period X, but the earnout measure ends in period Y. The buyer accelerates invoicing of period-Y revenue in period X, or vice versa, moving the needle unfavorably.

Working capital traps. If the earnout measures “net revenue after collections,” the buyer may intentionally extend payment terms to customers, pushing actual cash collection into the next measurement period.

How disputes are resolved in practice

Escrow agent review. Many deals place 10–20% of the purchase price in a holdback escrow, specifically to cover earnout adjustments and indemnification. The escrow agent (typically a major bank or law firm) receives both buyer and seller calculations and arbitrates if they conflict. This is fast but limited to what the escrow term allows—often 12–18 months post-close.

Negotiated settlement. Buyer and seller each hire an accounting firm to audit the calculation independently. If they disagree, they negotiate a midpoint or agree on a specific item-by-item adjustment. Many deals settle 50–80% of the way to the seller’s position, trading certainty for closure.

Independent auditor review. The contract may stipulate that a “Big Four” auditor decides which calculation is correct. Both parties submit detailed workpapers. The auditor rules on methodology and judgment calls. This is more expensive (auditor bills $200K+) but carries weight with both sides.

Litigation. If the gap is large and no resolution path exists, one party sues for breach of the earnout definition. Courts interpret the contract language and may order the buyer to pay the earnout or reduce it, depending on whether the buyer met the “ordinary course” covenant. This is rare—litigation can cost more than the earnout itself—but serves as a backstop threat that pushes settlement.

Measurement period misalignment

Earnouts often span multiple years. Year 1 revenue is measured January–December of year 1; year 2 measured separately. But calendar year doesn’t match the buyer’s fiscal year, or the buyer closes the deal on June 15 and must decide whether year 1 is six or eighteen months. These gaps create boundary disputes: did that June 20 invoice count as year 1 or year 2? If it’s $5 million and tips the milestone, the entire earnout payment swings.

Smart contracts specify measurement windows in absolute terms: “the twelve calendar months ending December 31, 2023,” not “the first full year post-close.”

Prevention: clarity in the earn-out clause

Well-drafted earnouts include schedules showing:

• Exact metric definition. Revenue is “invoiced customer revenue excluding returns, rebates, and taxes.”
• Adjustments explicitly enumerated. “EBITDA is adjusted for severance, legal fees related to integration, and one-time software licenses—and these items only.”
• Third-party auditor sign-off. Both buyer and seller agree upfront that a named Big Four firm will calculate the result; their determination is binding.
• Measurement schedule. Calendar-day boundaries, not relative terms, with clear handling of partial periods.
• Baseline compliance. A statement that the buyer will operate the acquired business “in the ordinary course consistent with past practice and industry custom,” constraining post-close changes that might tank the earnout.

These details cost time in negotiation but save millions in post-close dispute costs.

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