An earnout is a provision in a business sale where a portion of the purchase price is contingent on the business achieving specific financial or operational targets after closing. In the lower middle market, earnouts appear in roughly 25-40% of transactions and have become increasingly common as buyers and sellers navigate valuation disagreements, economic uncertainty, and the complexity of transitioning founder-led businesses.
Earnouts can be the mechanism that gets a deal across the finish line — or the source of the most contentious post-closing disputes in M&A. Understanding how they work, when they make sense, and how to structure them to minimize conflict is essential for any business owner considering a sale.
How Earnouts Work
In a typical earnout structure, the buyer pays a base purchase price at closing — often 60-80% of the agreed total value — and commits to paying additional consideration over a defined period (usually one to three years) if the business hits predetermined targets.
Those targets are typically tied to revenue, EBITDA, gross profit, or specific operational milestones like customer retention rates, contract renewals, or product launches. The earnout payments can be structured as a fixed amount triggered by achieving a threshold, or as a formula that scales proportionally with performance.
For example, a $12M deal might be structured as $9M at close plus up to $3M in earnout payments over two years — $1.5M paid if the business achieves $4M in EBITDA in year one, and another $1.5M if it hits $4.2M in year two.
When Earnouts Make Strategic Sense
Earnouts are most useful in specific deal situations where there is a legitimate gap between what the buyer and seller believe the business is worth.
High-growth businesses. If your business has been growing at 20-30% annually and you believe the trajectory will continue, a buyer may discount that growth because they cannot verify it will persist under new ownership. An earnout lets you capture the value of that growth without asking the buyer to pay for unproven future performance upfront.
Customer concentration risk. If 30%+ of your revenue comes from a small number of customers, buyers will discount the purchase price to account for the risk that those customers leave after the transition. An earnout tied to customer retention demonstrates your confidence that relationships will hold — and compensates you if they do.
Transition-dependent value. In founder-led businesses where the owner’s relationships, expertise, or personal involvement drive significant value, earnouts tied to a successful transition period ensure the seller stays engaged and motivated during the handoff.
Valuation disagreements. When a buyer and seller are $1M-$3M apart on price and neither side will move, an earnout can bridge the gap by letting the business’s actual performance determine who was right. This is the most common use case in practice.
The Risks Sellers Need to Understand
Earnouts introduce risk that does not exist in a clean cash-at-close deal. The most significant risks include:
Loss of control. Once you sell the business, the buyer controls operations. They make decisions about pricing, staffing, capital expenditure, sales strategy, and overhead allocation. Any of those decisions can negatively impact the metrics your earnout is tied to — intentionally or unintentionally. This is the single biggest source of earnout disputes.
Accounting manipulation. If your earnout is tied to EBITDA, the buyer can influence that number through expense allocation, overhead charges from a parent company, management fees, accelerated depreciation, or changes to revenue recognition policies. Without tight accounting definitions and protections in the purchase agreement, you are exposed.
Business integration changes. If the buyer integrates your business into their existing operations — merging accounting systems, consolidating facilities, reassigning staff — it may become impossible to cleanly measure the standalone performance of your former business. This makes earnout calculations contentious or meaningless.
Payment disputes. Even with clear metrics, disputes over earnout calculations are common. The buyer prepares the earnout calculation, the seller reviews it, and disagreements over methodology, adjustments, or interpretation of defined terms frequently end up in arbitration or litigation.
How to Structure an Earnout That Actually Works
If an earnout is part of your deal, invest significant time and legal attention in the structure. The following principles dramatically reduce the likelihood of disputes.
Use revenue-based metrics over EBITDA. Revenue is harder to manipulate than EBITDA because it sits at the top of the income statement. While EBITDA can be affected by dozens of expense-side decisions the buyer controls, revenue is more transparent and easier to verify. If the buyer insists on EBITDA-based earnouts, demand detailed definitions of what gets included and excluded, and require that accounting policies remain consistent with pre-closing practices.
Define everything in the purchase agreement. The earnout section of your purchase agreement should be one of the most detailed provisions in the entire document. Define exactly how metrics will be calculated, what accounting standards apply, what expenses can and cannot be allocated, and how disputes will be resolved. Leave nothing to interpretation.
Require the buyer to operate in good faith. Your purchase agreement should include an explicit covenant that the buyer will operate the business in the ordinary course and will not take actions designed to reduce earnout payments. While "good faith" covenants are imperfect, they create a legal standard that provides recourse if the buyer deliberately undermines your earnout.
Establish an independent dispute resolution mechanism. Specify that earnout calculation disputes will be resolved by an independent accounting firm (not the buyer’s auditor) whose decision is final and binding. This avoids lengthy litigation and creates a neutral arbiter.
Negotiate a floor. If possible, negotiate a minimum earnout payment regardless of performance — effectively converting a portion of the contingent consideration into a guaranteed payment. Even if the floor is modest (say, 30-50% of the total earnout), it ensures you receive meaningful additional consideration.
Keep the earnout period short. One to two years is ideal. Three years is the maximum you should accept. The longer the earnout period, the more exposure you have to operational changes, market shifts, and buyer decisions that are beyond your control.
Earnout vs. Seller Note: Know the Difference
Sellers frequently confuse earnouts with seller financing, but they are fundamentally different instruments. A seller note is a fixed debt obligation — the buyer owes you the money regardless of business performance. An earnout is contingent consideration — you only receive payment if specific conditions are met.
From a risk perspective, a seller note is significantly safer. If you have the negotiating leverage to convert an earnout into a seller note (even at a slightly lower amount), that is usually the better outcome.
The Bottom Line
Earnouts are a legitimate deal tool that can bridge valuation gaps and align incentives between buyers and sellers. However, they carry real risk — particularly around loss of control and accounting manipulation — that sellers must understand and negotiate against. The quality of your earnout structure depends almost entirely on the quality of the legal documentation, the specificity of the defined terms, and the protections built into the purchase agreement.
If you are evaluating a deal that includes an earnout component, schedule a conversation with Icon Business Advisors. We help sellers negotiate earnout structures that maximize upside while minimizing the risk of post-closing disputes.