What is an Earnout? M&A Earnout Structures Explained
An earnout is a deal structure in which part of the purchase price is contingent on the business achieving specified financial or operational targets after closing. For sellers, earnouts are one of the most misunderstood and sometimes painful features of M&A — because they look like additional consideration at the time of signing, but can be extremely difficult to achieve once the business is under new ownership.
Why earnouts are used
Earnouts are typically used to bridge a valuation gap between buyer and seller — usually when the seller believes the business will perform significantly better than historical results suggest, and the buyer is not willing to pay for that potential upfront. By deferring part of the consideration, the parties agree that the seller gets paid more if the upward case materialises, and the buyer limits its downside if it does not. Earnouts are also common in sectors where revenue visibility is limited — media, professional services, and project-based businesses — and in transactions where key people retention is essential to value.
How earnout structures work
An earnout has three key parameters: the metric (what gets measured), the target (what threshold must be achieved), and the payment (how much is paid if the target is met). Earnout metrics can be revenue, gross profit, EBITDA, or specific operational KPIs. Payment structures range from simple binary (full amount if target achieved) to graduated (pro-rata payment across a range of outcomes). Earnout periods typically run 1–3 years post-closing, with financial targets measured annually. Critically, the buyer has operational control of the business during the earnout period — which creates fundamental tension.
The fundamental problem with earnouts for sellers
Once a deal closes, the buyer controls the business. They make decisions about pricing, investment, hiring, cost allocation, and accounting. All of these decisions affect the earnout metric. A buyer who allocates group overhead to the acquired business, decides to invest aggressively (depressing near-term profits), or integrates the acquired business in a way that makes its standalone performance impossible to measure — has created a situation where the earnout becomes impossible to achieve or impossible to verify. This is not always intentional, but it is a structural problem with earnouts that sellers must understand and protect against.
How to protect yourself in an earnout negotiation
If an earnout is unavoidable, the protective provisions you negotiate are as important as the earnout amount. Key protections include: operating covenants that restrict the buyer from making decisions that materially harm the earnout metric without seller consent; accounting protections that require consistent accounting treatment during the earnout period; integration protections that restrict the extent to which the business can be merged or its costs re-allocated; dispute resolution mechanisms that are independent and efficient; and a cap on the costs that can be allocated to the business from the wider group. Without these protections, earnouts are frequently not achieved even when the business performs well.
When earnouts make sense — and when to refuse them
Earnouts make sense when: the valuation gap is real and the seller genuinely believes in the upside case; the buyer has a track record of respecting earnout arrangements; the business will operate largely independently post-close; and the metric is objective and clearly measurable. Earnouts should be strongly resisted when: the business will be integrated into the buyer's operations; the buyer has discretion over decisions that directly affect the earnout metric; or the seller does not trust the buyer's commercial intentions. The best outcome for sellers is always upfront cash consideration — earnouts are a compromise that frequently disappoint.
Key takeaways
An earnout defers part of the purchase price, making it contingent on post-closing financial performance.
Earnouts bridge valuation gaps but create fundamental tension — the buyer controls the business during the earnout period.
Sellers should negotiate operating covenants, accounting protections, and integration restrictions to protect earnout achievement.
Earnouts in integrated businesses are extremely difficult to achieve because revenue and cost allocation decisions are entirely within the buyer's control.
The best outcome for sellers is maximising upfront cash — earnouts should be a last resort, not an accepted feature of every deal.
Related M&A terms
Continue building your M&A knowledge with these related guides.
Considering selling your business?
Understanding the mechanics is preparation. The conversation about your specific business — what it is worth in the current market, what a sale process would look like, and whether the timing is right — is a different one. We offer an initial consultation at no charge and without obligation. If it is not the right time, we will tell you that too.