Earnout in a Business Sale: What It Pays

The short answer

An earnout is the part of your price that is not paid at closing. It is paid later, only if the company hits agreed targets after you no longer control it. Roughly one in five M&A transactions carries one, the median performance period is 24 months, and across private-target deals earnouts pay out about 21 cents on every dollar of earnout consideration on offer (SRS Acquiom).

That number is the whole argument. An earnout is not a higher price. It is a contingent claim against a business somebody else is running, and the discount to face value is far steeper than most sellers assume when they agree to one.

How an earnout actually works

Four terms define one, and all four are negotiable:

• The metric. Revenue, gross profit, EBITDA, unit count, a contract renewal, a regulatory approval. Revenue is easiest to verify and easiest for a buyer to hit while destroying margin. EBITDA is the better economic measure and far easier for a buyer to suppress through allocated overhead, management fees, and new hires.
• The target and the period. In SRS Acquiom's 2025 Deal Terms Study — over 2,200 private-target acquisitions closed between 2019 and 2024 — periods have been shortening, with no earnout longer than four years among deals closing in 2024 (SRS Acquiom).
• The structure. All-or-nothing at a single threshold, or a sliding scale. All-or-nothing is where disputes live: land one percent under and you are paid zero. The same study found 68% of earnout deals use multiple metrics, which multiplies the ways to miss.
• The protections. What the buyer must do, or may not do, during the period. This decides the outcome, and it is the clause sellers spend the least time on.

What earnouts actually pay

The data on realised payouts is unflattering and consistent. Of private-target deals with earnouts, 59% pay something and 41% pay nothing at all; among those that do pay, roughly half the maximum available is what lands. Blend the zeros back in and you get the 21 cents. Of the deals that paid, 17% needed a renegotiation to avoid litigation, and earnouts are contested at least 28% of the time (SRS Acquiom).

Two of those figures matter most to a lower-middle-market owner. A better-than-one-in-four chance of a fight is not a tail risk, it is a base case to budget legal fees against. And SRS Acquiom's claims data notes that deals with upfront value of $50 million or less generally show lower earnout achievement than the broader sample (SRS Acquiom, 2024 M&A Claims Insights Report). In that range, 21 cents is the optimistic end.

Pricing an earnout: a worked example

The company below is invented. The numbers are arithmetic on a hypothetical, not a quote, a projection, or a description of any transaction.

A business does $6 million of normalized EBITDA. The buyer will pay 7.0x, or $42 million. You believe it is worth 8.0x, or $48 million, because next year's pipeline supports it. The buyer proposes closing the $6 million gap with a two-year earnout: the full $6 million if EBITDA reaches $7.2 million in year two, nothing if it does not. Headline price, $48 million. Now apply the observed distribution to the $6 million at risk.

Outcome	Earnout paid	Total consideration	Effective multiple
Pays nothing (41% of earnouts)	$0	$42.0M	7.0x
Pays partially (~50 cents, the typical successful case)	$3.0M	$45.0M	7.5x
Pays in full	$6.0M	$48.0M	8.0x
Blended at the observed 21 cents	$1.26M	$43.26M	7.2x

The 8.0x offer is a 7.2x offer with a lottery ticket stapled to it. That is not an argument against ever taking one — it is an argument for negotiating the multiple on the cash at closing and treating the earnout as upside you have already written off. Run your own EBITDA through the business valuation calculator first, and read how PE firms value a company for the adjustments a buyer will make to the EBITDA an earnout is then measured against. A seller note at least carries a coupon and a maturity date, and rollover equity converts when the sponsor sells; an earnout is the only deferred piece whose amount depends on decisions made by the person who owes it.

Why the buyer's post-close conduct is the real variable

From the day you sign, the company is run by someone whose economic interest is to miss your target. That is not an accusation of bad faith, it is arithmetic: every dollar of discretionary spend the buyer pushes through the earnout period — a sales hire, a systems migration, allocated corporate overhead, a management fee — reduces the EBITDA your payment depends on and belongs to them either way.

So the accounting has to be frozen in the contract rather than left to the buyer's policies, and you need the information rights to check it: periodic statements, access to the underlying records, and a defined window to object. An earnout you cannot audit is not an earnout.

Governance is the other half: a buyer holding veto rights over budgets, hires and capital spending can starve the business of what it needs to hit the number while breaching nothing, and the 100-day plan that follows a private equity buyout lands on your team during exactly the period you are being measured.

What the courts have said

Earnout litigation turns almost entirely on the efforts clause. Delaware's recent decisions are mostly life-sciences milestone deals rather than lower-middle-market operating companies, but they show how narrowly the words get read, and that lesson transfers exactly.

Buyers won where the clause was loose. Himawan v. Cephalon (April 2024, affirmed January 2025) set an objective standard measured against similarly-resourced companies and expressly let the buyer weigh costs and profitability; it stopped the programme, the court held that was reasonable, and roughly $200 million of claimed milestones went unpaid. In Fortis Advisors v. Medtronic (July 2024) the buyer was barred only from acts whose "primary purpose" was frustrating the earnout, and the claim was dismissed (Jones Day).

Sellers won where the clause was specific. In Fortis Advisors v. Johnson & Johnson the standard was tied to the buyer's own usual practice for priority products of similar commercial potential, against ten enumerated factors, and expressly excluded the cost of the earnout as a consideration. Chancery found a breach and awarded approximately $1 billion. The Delaware Supreme Court affirmed most of it on 12 January 2026, reversing only the first milestone on the ground that there was no contractual gap for the implied covenant to fill once the agreement named a specific regulatory pathway. Damages were measured by the probability each milestone would have been reached absent the breach, not by paying the milestones in full (Mayer Brown, Sidley).

The lesson is narrow and expensive: courts will not write the protection you failed to negotiate, a standard benchmarked to the buyer's own practice beats a generic one, and even a win is discounted by probability. Vague drafting is a transfer of value to the buyer, priced at signing.

The tax treatment nobody prices at the table

An earnout is usually a contingent payment sale — in the IRS's words, one "in which the total selling price can't be determined by the end of the tax year of sale." It is reported under the installment method, where each payment splits into three parts: interest income, return of basis, and gain (IRS Publication 537).

The interest part is the trap. A contract must provide "adequate stated interest" — broadly, the stated principal cannot exceed the present value of the principal and interest the contract promises. Where it does not, the IRS imputes the difference and treats it as interest income to you whatever the agreement calls the payment. A flat $6 million payable in 24 months with no stated interest therefore does not deliver $6 million of capital gain; part arrives as ordinary interest income at a higher rate. The after-tax ledger on a private equity sale works through how much of a headline price survives tax, and a deferred, contingent, partly-recharacterized payment survives less of it.

What to negotiate, in order

1. Less earnout. On the observed payout rate, a dollar of closing cash is worth roughly five dollars of earnout. Trade length or metric for a higher number at closing before you trade anything else.
2. A benchmarked efforts standard. Tie it to the buyer's own conduct for comparable businesses, enumerate what they may and may not consider, and exclude the cost of the earnout from those factors.
3. Frozen accounting and information rights. Named accounting principles, excluded cost categories, capped overhead and management fees, separate reporting unit, periodic statements, audit access, defined objection window.
4. Acceleration. Payable in full on a resale of the business, a termination of your employment without cause, or a material breach. Without it, any of those events can simply end your payment.
5. A real dispute mechanism. An independent accountant whose determination is final and binding will be enforced absent manifest error — and without an explicit fee-shifting clause you pay your own costs even when you win (Jones Day). Write the fee-shifting in.
6. No set-off. Bar the buyer from netting indemnity claims against the earnout unless the claim has been adjudicated.

All six belong in the letter of intent, not the last week of documentation. Choosing an M&A advisory firm covers what to ask a prospective advisor, including whether the fee is calculated on the headline price or on money you actually receive — which decides how hard anyone at the table argues about the difference.

Frequently asked questions

What is an earnout in a business sale? A portion of the purchase price paid after closing, only if the business hits agreed targets during a defined period. It bridges a disagreement about value: the buyer will not pay today for performance it has not seen, so it offers to pay later if that performance arrives.

How long do earnouts last? The median performance period is 24 months, and periods have been shortening — no deal closing in 2024 in SRS Acquiom's study carried an earnout longer than four years. Shorter is better for a seller: less time for the buyer's decisions to move the number.

Is an earnout taxed as capital gain? Partly. A contingent payment sale is reported under the installment method, and each payment splits into interest income, return of basis, and gain. If the contract does not provide adequate stated interest, the IRS imputes it, so some of what you thought was capital gain arrives as ordinary interest income. Price it with your own tax advisor before you agree to the structure.

Can I avoid an earnout altogether? Sometimes, by changing the buyer rather than the clause. A strategic buyer paying for synergies, or a structure that finances the full value against the business itself, removes the need to bridge a valuation gap with a contingency at all. The alternatives to selling to private equity sets out the routes and what each pays.

Sources

• SRS Acquiom – Managing M&A Earnouts (prevalence, median period, payout and dispute rates)
• SRS Acquiom – 2025 M&A Deal Terms Study (2,200+ private-target deals closed 2019–2024)
• SRS Acquiom – 2024 M&A Claims Insights Report (earnout achievement by deal size)
• Jones Day – Earnouts in M&A Transactions: Recent Decisions From Delaware
• Mayer Brown – Delaware Law Alert: New Perspectives on Earnouts (Johnson & Johnson v. Fortis Advisors, Del. Jan. 12, 2026)
• Sidley – Delaware Supreme Court partially reverses the Fortis Advisors earnout decision
• IRS Publication 537 – Installment Sales (contingent payment sales, unstated interest and OID)

The bottom line

An earnout converts a price into a probability. The honest way to read an offer is to strike the earnout out entirely, look at the cash at closing, and ask whether that number alone is one you would accept — because 41% of the time, that is the deal you signed.

The deeper problem is that an earnout exists because the buyer will not fund your view of the company's value today. An Independent Buyout makes your own leadership team the buyer, financed against the business at a valuation set the way a sponsor would set it, so the value is paid at closing rather than made contingent on a business someone else is running. The IBO versus private equity numbers sets the two side by side, and every exit option puts both in context.

If your company does $3M+ in EBITDA and you are weighing an offer with an earnout in it, talk to IBO Advisors and have the contingent part costed before you sign.