A buyer agrees that your company is worth $20 million, but will pay only $15 million at closing. The remaining $5 million depends on performance over the next two years. That gap is an earnout, and how are earnouts structured can determine whether it becomes a fair bridge to closing or a source of costly post-sale conflict.
For lower middle market owners, earnouts often arise when the seller and buyer see the business’s future differently. The seller may have strong contracted growth, a new product gaining traction, or a customer concentration issue that is expected to improve. The buyer may recognize that potential while resisting payment for results that have not yet materialized. A properly designed earnout can close that valuation gap. A poorly designed one can leave the seller exposed to decisions they no longer control.
How Are Earnouts Structured in M&A Transactions?
An earnout is contingent consideration. It is an additional payment, made after closing, if the acquired company meets specified financial or operational targets during a defined period. The buyer pays a fixed amount at closing, then pays some or all of the contingent amount as milestones are achieved.
The structure is usually set out in the purchase agreement with far more precision than a term sheet can provide. It must identify the metric, measurement period, accounting rules, payment dates, reporting requirements, operating covenants, dispute procedures, tax treatment, and the parties responsible for managing the business.
The central principle is straightforward: the metric should reflect the value uncertainty that caused the earnout in the first place. If the disagreement concerns whether a signed pipeline will convert into revenue, revenue may be appropriate. If the buyer questions the durability of margins, EBITDA or gross profit may be more relevant. Using a familiar metric simply because it is easy to describe is not enough.
The Core Elements of an Earnout
The upfront payment and contingent amount
Earnouts are commonly expressed as a portion of total potential consideration. For example, a transaction may provide $15 million at closing and up to $5 million in earnout payments. In lower middle market transactions, the proportion varies widely based on risk, the buyer’s confidence in diligence findings, financing constraints, management retention, and competitive tension in the sale process.
A larger earnout can increase headline value, but headline value is not the same as realized value. Sellers should evaluate the probability of achieving the targets, their ability to influence performance, and the creditworthiness of the buyer. A certain $18 million may be economically superior to $15 million at close plus a speculative $5 million earnout.
The performance metric
Revenue, EBITDA, gross profit, recurring revenue, customer retention, and regulatory or product milestones are common earnout measures. Each creates different incentives and risks.
Revenue is often easier to verify, but it can reward unprofitable growth. EBITDA aligns more closely with economic performance, yet it is vulnerable to changes in expense allocations, integration costs, executive compensation, capital spending, and accounting policies. Customer retention may work well for service businesses with recurring contracts, provided the agreement clearly defines what constitutes a retained customer and how renewals, downgrades, and cross-selling are treated.
For a founder-led business, an EBITDA-based earnout deserves particular scrutiny. After closing, the buyer may control pricing, staffing, overhead allocation, investment priorities, and the timing of expenses. Without carefully negotiated protections, the buyer can make commercially reasonable decisions for its broader organization that nonetheless reduce the seller’s earnout.
The measurement period and payment timing
Most earnouts run from one to three years. Shorter periods reduce uncertainty and allow the seller to move on sooner. Longer periods may be justified when value depends on multiyear contracts, a product launch, regulatory approval, or a longer integration cycle.
The agreement should specify whether performance is measured annually, cumulatively, or at the end of the full period. Annual measurement can provide earlier payments and reduce the risk that one weak quarter eliminates the entire earnout. A cumulative structure may better fit a business with seasonal results or uneven project timing.
Payment mechanics matter as much as the target. A seller may negotiate installment payments as thresholds are reached, rather than waiting until the end of a two-year period. The parties should also address whether an overachievement in year one carries forward to offset a shortfall in year two.
The payout formula
Earnouts may be structured as a binary payment, a tiered payment, or a sliding scale. A binary structure pays the full amount only if the target is met. It is simple but can produce an unfair cliff: missing a target by one dollar yields no payment.
Tiered or linear formulas generally create better alignment. A business might earn 50 percent of the contingent payment at 90 percent of target, 100 percent at target, and additional consideration for results above target, subject to a cap. The formula needs examples in the purchase agreement so both sides can test how it operates under realistic outcomes.
Protections Sellers Should Negotiate
A seller should not assume the buyer will preserve business operations solely to support an earnout. The buyer has paid for the company and must run the combined organization in its own commercial interest. The goal is not to prevent normal integration. It is to prevent actions that artificially or unnecessarily impair the agreed metric.
Key protections often include:
- Consistent accounting principles and clearly defined adjustments for nonrecurring items, purchase accounting, intercompany charges, and integration expenses.
- Reasonable operating covenants requiring the buyer not to take actions primarily intended to reduce the earnout.
- Limits on changes to expense allocations, sales territories, pricing authority, or customer ownership when those changes directly affect the measure.
- Timely financial reporting, access to supporting records, and a defined review period for the seller.
- An independent accounting dispute process with a clear scope, timeline, and allocation of costs.
These provisions must be calibrated. A buyer will rarely agree to operate a business solely for the seller’s contingent payment, particularly where integration is central to the acquisition thesis. Overly restrictive covenants can also create friction after closing. The more practical approach is to define the metric precisely, identify foreseeable integration issues during negotiations, and establish objective treatment for them.
Control, Employment, and the Post-Closing Reality
Earnouts frequently overlap with management employment arrangements, but they should not be confused. An employment agreement compensates the seller for continuing to work. An earnout compensates the seller for achieving the transaction’s contingent value targets. Combining the two too closely can create tax, employment, and negotiation complications.
Control is especially important when the seller is expected to remain as president or general manager. What decisions require buyer approval? Can the buyer replace the seller before the earnout period ends? What happens if the seller is terminated without cause, resigns for good reason, becomes disabled, or dies? The purchase agreement and employment documents should provide a coordinated answer.
Sellers should also examine acceleration provisions. If the buyer sells the acquired business during the earnout period, merges it into another division, or materially changes the reporting structure, the original metric may become impossible to calculate. Potential solutions include acceleration at a negotiated value, measurement immediately before the event, or a successor obligation to honor the earnout.
Tax and Financing Considerations
The after-tax value of an earnout can differ materially from its stated amount. The characterization of payments may depend on the transaction structure, whether payments are contingent purchase price or compensation, and the seller’s continued employment. Tax counsel should review these issues early, not after the commercial terms are largely settled.
Sellers should also assess payment security. An earnout is generally an unsecured promise of the buyer unless the agreement provides otherwise. In appropriate circumstances, parties may consider an escrow, letter of credit, parent guarantee, setoff limitations, or other credit support. The right approach depends on the buyer’s financial strength, acquisition financing, and the size of the contingent amount.
Build the Earnout Before the Letter of Intent Is Final
Earnout disputes are often born in the gap between a high-level letter of intent and a detailed purchase agreement. Before accepting a contingent offer, model the payout under downside, expected, and upside cases. Recast historical financials using the proposed definitions. Identify every decision the buyer could make that changes the result. Then negotiate the commercial principles while leverage is still highest.
An earnout can be a disciplined solution when it measures a specific uncertainty, uses a transparent formula, and recognizes the realities of post-closing control. For business owners, the useful question is not whether an earnout raises the purchase price. It is whether the structure converts the value you built into consideration you can reasonably expect to receive.