Earnout

An earnout is a provision in a merger or acquisition agreement that ties a portion of the purchase price to the acquired business’s financial performance after the deal closes. Rather than paying the full agreed price at signing, the buyer pays an initial amount upfront and promises additional payments if the target hits specified performance targets — revenue, profit, customer retention, or other metrics — over a defined period.

Why buyers and sellers use earnouts

Earnouts emerge from a fundamental M&A problem: disagreement about what the target is worth. The seller (and its shareholders) believes the business will grow rapidly and is worth a premium price. The buyer is more skeptical, fearing overoptimism in forecasts or key customer departures post-closing. Rather than deadlock, both sides compromise: the buyer pays a lower upfront price and agrees to pay more later if the seller’s optimistic projections prove correct.

From the buyer’s perspective, earnouts reduce risk. If the target underperforms, the buyer avoids overpaying. They also align incentives: the seller’s founders, who often stay on post-acquisition to manage the business, earn extra cash only if they deliver the promised results. This encourages them to stay engaged and help the combined company succeed.

For sellers, earnouts offer a safety valve when valuations feel inadequate. If the buyer won’t pay the full price upfront, earnouts allow the seller to capture value from their expected future success. This is especially common in acquisition of smaller, high-growth private companies where forecasts are inherently uncertain but plausible.

Structuring an earnout: the mechanics

A typical earnout agreement specifies:

The payment trigger. The parties define precise financial targets — for instance, “total revenue of $50 million in year two post-closing” or “EBITDA of $15 million averaged over three years.” These must be measurable and based on the target’s financial statements, audited if necessary.

The payment schedule. Earnout payments are often tiered: if the target hits 80 per cent of the revenue target, the seller receives 50 per cent of the earnout; if it hits 100 per cent, it receives 100 per cent. Some earnouts have upside — exceeding targets unlocks additional payments, up to a cap.

The earnout period. Most earnouts run two to three years post-closing, though longer periods (up to five years) occur with particularly uncertain targets. The longer the period, the greater the risk the seller will not receive the full amount due to factors outside their control.

Exclusions and adjustments. The agreement must address how to account for extraordinary events. If the target is damaged in a disaster, do earnout targets get adjusted downward? If the buyer integrates the target into a larger operation, how are revenues and profits allocated to ensure fair measurement? These clauses often become sources of dispute.

Governance and audit rights. The seller typically retains the right to audit the target’s financial records, allowing them to verify the buyer’s calculations. This prevents the buyer from manipulating accounting to avoid earnout payments.

The tax implications for sellers

Earnouts carry tax complications. For the seller, an earnout payment received in a future year is typically treated as gain in that year, not at the original acquisition. This can push the seller into a higher tax bracket if the earnout is substantial. Moreover, if the earnout is never paid because targets are missed, the seller cannot claim a deduction in the acquisition year — they must wait and see if future payments materialise.

Buyers may also face tax issues. In some cases, earnout payments qualify as additional purchase price (a cost basis add-on), increasing the buyer’s depreciable or amortizable base. In others, the earnout is treated as compensation for the seller’s continued services if founders stay post-closing. The distinction affects the buyer’s deductions.

Both parties should obtain tax advice before agreeing to earnout terms, as the structure can significantly affect after-tax proceeds and costs.

Common disputes: Why earnouts turn ugly

Earnouts are notorious sources of post-acquisition conflict. The fundamental problem is misalignment between the buyer’s and seller’s incentives once the deal is done.

Strategic changes. The buyer may integrate the target into its own operations, cut costs aggressively, or reallocate resources away from the target’s business lines. These decisions can make earnout targets impossible to hit, even if the underlying business is sound. The seller feels cheated; the buyer argues it has operational discretion post-closing.

Accounting interpretation. The earnout agreement specifies a measurement metric — often “EBITDA” or “revenue” — but accounting allows latitude. Does EBITDA include or exclude corporate overhead allocations? Are stock-based compensation charges deducted? One party’s reasonable interpretation is the other’s deliberate manipulation.

Performance shortfalls. If the target genuinely underperforms, the seller blames external factors (market downturn, customer loss, supply chain issues) beyond their control. The buyer insists the forecasts were unrealistic and the seller oversold the opportunity.

Litigation over earnouts is costly and acrimonious. Courts must unpick complex accounting, assess causation (was the miss due to the buyer’s decisions or external factors?), and determine damages. Many advisors now recommend avoiding earnouts if the parties cannot agree on simple, objective metrics.

Earnouts versus other contingent pricing structures

Earnouts are one form of contingent consideration. Stock in the acquirer can also be used — the seller receives additional shares if the target hits targets, aligning the seller with the buyer’s future success but also exposing the seller to market risk.

Seller financing (where the seller lends money back to the buyer) is another alternative, offering the seller ongoing upside but also credit risk. A note issued by the buyer to the seller at an agreed interest rate is more predictable than an earnout, though it lacks the incentive alignment.

Some deals combine multiple structures: upfront cash, seller financing, and an earnout. This gives the seller multiple streams of value and multiple layers of risk.

When earnouts make sense

Earnouts work best when:

• The target is a smaller, well-defined business unit, not a complex merger of two large enterprises.
• The performance metrics are objective and based on audited financial statements, not subjective measures like customer satisfaction.
• The earnout period is short (two to three years), minimising the time for disputes and external factors to intervene.
• The seller’s founders remain involved post-closing and have genuine control over the metrics.
• The upfront price is not so low that the seller feels cheated from day one.

Earnouts are poor choices when the target is being heavily integrated, when metrics are ambiguous, or when the seller has little post-closing involvement. In these cases, a lump-sum price — even if lower — is cleaner and less likely to spawn disputes.

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