That distinction matters. The Real Exit describes an earnout as a structure that "can bridge valuation gaps between buyers and sellers" while introducing a specific risk: if the targets are not met, the seller may never receive the contingent portion at all. It is a financing device for uncertainty, and the uncertainty is usually about your numbers.
This guide covers how earnouts work, the metrics and structures both sides negotiate, the risks sellers need to protect against, how tax and accounting treatment factor in, and how earnouts compare with seller notes and rollover equity. Exit Boston works with founders across New England on exactly these decisions.
Key Takeaways
- An earnout ties part of the price to post-closing performance, typically 10% to 30%+ over 1 to 3 years
- Earnouts are usually the price of an unresolved earnings-quality question, and QoE EBITDA discrepancies doubled as a cause of broken deals between 2023 and 2025
- Revenue, EBITDA, gross profit and milestones each shift manipulation risk to a different party
- The highest headline price is frequently the one with the most contingency attached to it
- Model the deal at the closing payment alone; if it does not work there, the earnout is masking a problem, not solving one
What Is an Earnout and Why Do Owners Encounter Them?
An earnout is contingent consideration: part of your sale price paid only if the business hits agreed targets after closing. Buyers and sellers use it when they cannot agree on what the business is worth today.
The Real Exit frames the arithmetic plainly: on a $25,000,000 purchase price, a buyer might pay $20,000,000 in cash at closing and place $5,000,000 in earnout potential. Nothing about that is unusual. What is unusual is how rarely sellers price the second number at anything other than face value.
How common is this? According to the 2025 ABA Private Target M&A Deal Points Study, earnouts appeared in 18% of surveyed middle-market deals, down from 26% in the 2023 study.
SRS Acquiom's research puts the figure closer to one in five transactions overall, and far higher in life sciences, where earnouts show up in over 80% of deals.
Typical earnout terms include:
- Duration: 1 to 3 years is standard outside life sciences (life sciences deals often run 3-5+ years)
- Share of price: 15% to 30% is common in the lower middle market; a 2024 Harvard Law School Forum median was 31% of closing payments outside life sciences
- Seller obligation: you will likely need to stay and run the business through the earnout period, which changes the entire negotiation
That last point matters more than most sellers expect. You are not only negotiating a price. You are negotiating the terms of a job you will be doing for someone else, with your remaining proceeds depending on how well that arrangement holds.
There is a readiness question underneath this. A company with recurring revenue, clean financials and documented EBITDA adjustments rarely needs an earnout to close at fair value: there is nothing left for the buyer to be uncertain about. A company with recent, unproven growth almost always does.
How Earnout Structures and Metrics Are Negotiated
Every earnout has two components: a fixed payment at closing and a contingent payment tied to future performance. The negotiation lives almost entirely in how the second piece is defined.
Choosing the Metric
The Real Exit lists four metric families that middle-market earnouts are typically built on: revenue targets, EBITDA targets, customer retention, and product milestones. Which one you accept determines who carries the manipulation risk.
| Metric | Who tends to prefer it | Why |
|---|---|---|
| Revenue/net revenue | Sellers | Harder to manipulate through cost allocation or accounting changes |
| EBITDA | Buyers | Reflects profitability, but easily shifted by how the buyer allocates costs post-close |
| Gross profit | Middle ground | Reduces some manipulation risk without ignoring cost structure |
| Customer retention | Buyers, where concentration exists | Objective and verifiable, but exposes you to churn you no longer control |
| Milestones | Both, situationally | Clear-cut (a regulatory approval, a contract renewal) but only works for verifiable events |
According to SRS Acquiom's 2025 deal terms research, 68% of earnout deals now include multiple metrics rather than relying on just one. Neither side fully trusts a single number, so stacked metrics have become the default compromise.
Payout Mechanics
Beyond the metric, the mechanics of payout matter just as much:
- Cliffs vs. sliding scales: nothing below a threshold, or a proportional payment as results build
- Tiers and caps: whether a ceiling still applies if performance runs well past target
- Cumulative/carry-forward thresholds: whether a strong year 2 can make up for a weak year 1
Operational Autonomy Is the Real Battleground
The metric definition means nothing if you do not control the inputs. Who sets staffing levels? Who approves budget? Who sets accounting policy during the earnout period?
If the buyer controls all three, the buyer controls your outcome. Precise metric definitions and real operational guardrails have to be settled before you sign the letter of intent, not after. Bring in an experienced M&A advisor, accountant and attorney at this stage. Once the LOI is signed and exclusivity begins, your leverage falls away quickly.
Why Buyers and Sellers Use Earnouts
Buyers and sellers rarely want the same thing from an earnout, but both can walk away satisfied if it is structured well.
Buyers use earnouts to:
- Defer part of the payment and reduce acquisition risk
- Test whether the seller's growth projections actually hold
- Retain the founder's involvement and institutional knowledge through transition
Sellers use earnouts to:
- Capture upside from recent momentum the buyer will not fund at closing
- Bridge a valuation gap that would otherwise end the process
- Reach a total number the buyer will not pay in cash
It is worth knowing why that gap keeps appearing. Axial's 2025 Dead Deal Report found that quality of earnings discrepancies as a cause of broken letters of intent more than doubled, from 10.6% in 2023 to 21.3% in 2025, while non-QoE diligence findings rose from 19.1% to 25.3%. Over the same period, financing failures fell from 21.3% to 10.7%. Buyers are not short of money. They are short of earnings they can underwrite.
That is the earnout in one line: what a buyer offers when earnings are real but durability has not been demonstrated. Many businesses that performed unusually well in 2021 and 2022 normalized by 2023 and 2024, and a quality of earnings provider finds that inside the first two weeks of diligence.
Risks of Earnouts and How Sellers Can Protect Themselves
The central risk is simple: you lose day-to-day control, but your final payday depends on decisions made without you.
Once the buyer takes over, they control:
- Cost allocation: shared services, overhead or corporate charges pushed onto your division
- Customer reassignment: accounts moved to other units, cutting the revenue that feeds your metric
- Accounting policy changes: new expense or revenue recognition rules that quietly shrink your number
- Integration interference: combined operations that bury standalone performance
This is not theoretical. SRS Acquiom's 2024 research found earnouts realized only about 21 cents on the dollar on average, and were contested at least 28% of the time. Harvard's research noted that litigation dockets mentioning "earn-out" nearly doubled year over year in early 2023.
Those odds are why contract design, not goodwill, is the protection.
The Price Illusion
The Real Exit gives this failure mode a name: the Price Illusion. Many founders focus on price above all else, because a higher offer looks like a better outcome. But some buyers offer a higher headline valuation while placing significant portions of the price in earnouts, contingent payments or aggressive performance targets. Others rely on heavy leverage that pressures the business after closing. The highest number is not always the best outcome, and it is frequently the number with the most contingency attached.
How to Protect Yourself
- Define every metric precisely: lock the accounting methodology and include worked examples in the contract
- Negotiate an ordinary-course covenant: require the buyer to run the business consistent with past practice
- Include acceleration on change of control: if the buyer sells mid-earnout, the remaining payment comes due
- Specify dispute resolution upfront: choose expert determination or arbitration and define the scope narrowly
The ABA's 2023 study found only 25% of earnout deals included a covenant requiring the buyer to maximize the earnout or operate the division on a standalone basis. That is a low number given how much protection it provides.
Model a downside scenario before you sign anything. Treat the contingent portion as a bonus, not as proceeds. If the deal does not work at the closing payment alone, the earnout is not solving your problem. It is masking it.
Tax and Deal-Structure Considerations
How an earnout is characterized shapes your tax bill and how the buyer books the obligation. Lock the treatment into the purchase agreement before closing, not after the first payment lands.
Are Earnouts Taxed as Capital Gains?
It depends on what the payment is for:
- Goodwill or equity value: generally qualifies for capital gains treatment
- Employment, consulting or a non-compete: typically taxed as ordinary income, often with payroll tax on top
The IRS applies substance over form. Labels in the deal documents matter less than what the earnout actually compensates you for, so the tax character is not always obvious on the face of the agreement.
Are Earnout Payments Expensed?
From the buyer's side, earnout obligations are generally recorded as contingent consideration at fair value under ASC 805, not expensed like a normal operating cost.
Changes in that fair-value estimate typically flow through the buyer's income statement each reporting period until the earnout resolves. That volatility is one reason buyers push hard on earnout caps.
For sellers: involve a tax advisor early. Model after-tax proceeds under best-case, base-case and worst-case performance before you sign.
Earnout vs. Seller Note and Other Deal Structure Alternatives
What Is the Difference Between an Earnout and a Seller Note?
A seller note is a fixed, scheduled deferred payment. The Real Exit works it through as a $25,000,000 purchase price paid as $18,000,000 in cash at closing and a $7,000,000 note, earning interest and repaid on a negotiated schedule. Your risk is the buyer's creditworthiness, not the company's performance, because you have become a lender to the business you used to own.
An earnout is contingent. What you receive, and whether you receive anything, depends on targets you may not control.
Other structures address the same risk-allocation problem:
- Escrows and holdbacks: part of the price is held back against indemnification claims, then released
- Rollover equity: you reinvest part of your proceeds into the acquiring entity. On a $25,000,000 enterprise value, that is typically $20,000,000 in cash and $5,000,000 rolled, and private equity buyers favour it because it aligns both sides on growth. Founders call it the second bite of the apple
Compare the Whole Structure, Not the Headline
The Real Exit poses the comparison directly. Offer A is $25 million, all cash at closing. Offer B is $30 million: 70% cash, 20% rollover, 10% earnout. Which is better depends on the buyer's credibility, the likelihood of achieving the earnout targets, the potential value of the rollover, and your own financial goals. The book's answer is that the higher headline valuation does not always produce the better financial outcome.
The book's label company case study shows what the rollover side of that trade can be worth. A regional label manufacturer with $3.4 million of EBITDA sold at 6.4x after roughly six months of preparation work, rolling 20% of the equity, valued at $4.35 million. As the platform scaled, EBITDA grew to $9.0 million and that retained 20% was worth $14.76 million at the second sale. The founder had expected roughly $16 million at the outset. The total outcome exceeded $32 million.
Rollover and earnout are not the same bet. One pays you for enterprise value you help create; the other pays you for a metric someone else administers. Both ask the same question: how much of your proceeds should depend on what happens after you hand over the keys?
Frequently Asked Questions
What is an earnout in a business sale?
An earnout is a portion of the sale price paid after closing, contingent on the business hitting agreed financial or operational targets. It is used to bridge valuation disagreements between buyer and seller.
What is the difference between an earnout and a seller note?
A seller note is a fixed, scheduled payment regardless of business performance, so your risk is the buyer's credit. An earnout is contingent and tied directly to how the business performs after the sale.
Are earnouts taxed as capital gains?
Payments tied to goodwill or equity value generally qualify for capital gains treatment. Payments tied to continued employment or non-compete covenants are typically taxed as ordinary income.
Are earnout payments expensed?
No. Buyers generally record earnout obligations as contingent consideration at fair value under ASC 805, with fair-value changes flowing through the income statement rather than being expensed as operating costs.
How long does a typical earnout period last?
Most earnouts run 1 to 3 years outside life sciences, where 3 to 5+ years is common. Longer periods generally increase dispute risk, since more can change in the business and the market.
How can a seller protect themselves in an earnout negotiation?
Insist on precise metric definitions with worked examples, an ordinary-course-of-business covenant, acceleration on change of control, and a clear dispute-resolution mechanism. Model a downside scenario before signing.
Can I avoid an earnout altogether?
Often, yes. An earnout prices an uncertainty. Where the uncertainty is earnings quality, resolving it before going to market, with clean financials and documented EBITDA adjustments, removes the reason a buyer proposes contingent consideration in the first place.
