How Earn-Outs Change Business Value in an SME Sale

An earn-out is simple on paper. You sell the business, get some money at completion, and the rest later if the company hits agreed targets.

What matters is this: the headline price and the real value are not always the same thing. If you’re an SME owner planning a sale, raising investment, or thinking about an exit, that gap can be expensive. In the current UK market, buyers are still selective, and earn-outs remain common where growth looks strong but still needs proving.

That doesn’t make earn-outs good or bad. It means you need to read the deal for what it is, cash now, risk later, and not confuse structure with value.

What an earn-out is and why buyers use it

An earn-out is a deal structure where part of the sale price is paid upfront and part is paid later, if the business performs as agreed after completion. The future payment is usually tied to numbers such as revenue, EBITDA, customer retention, or a milestone like winning a contract or launching a product.

For buyers, the logic is simple. They don’t want to pay today for growth that may never arrive tomorrow. If forecasts look strong but not fully proven, an earn-out gives them a way to move ahead without taking all of that risk on day one.

How the payment is split between now and later

Most earn-outs have two parts. First, there is guaranteed cash at completion. Second, there is deferred consideration, paid only if targets are hit.

Say a buyer offers £4m for your company. They might pay £3m on completion and hold back up to £1m over the next two years if EBITDA reaches agreed levels. On paper, the sale price is £4m. In practice, only £3m is certain.

That is why owners get caught out. The number sounds bigger than the amount they can bank.

Why earn-outs are common in SME deals

They show up often in SME sales because smaller businesses usually carry more uncertainty. A large corporate buyer may have layered reporting, management depth, and long trading history. Many SMEs don’t.

Maybe growth has been sharp but recent. Maybe the founder still drives sales. Maybe margins are improving, but the systems are still catching up. In 2026, those are exactly the points buyers are testing. An earn-out helps them preserve cash, avoid overpaying, and tie part of the price to what happens next, not only what happened last year.

The real way earn-outs affect business value

This is the part that matters most. An earn-out can make a business look more valuable, but that does not mean the business is more valuable in hard cash terms.

There are really three numbers in play: the headline price, the guaranteed amount, and the expected amount after you allow for risk. If you have a £1m earn-out and only a fair chance of collecting it, that £1m should not be treated as £1m of certain value today.

A £5m offer is not a £5m value if £1m depends on targets you may not control.

Why deferred money is usually worth less than cash upfront

A pound paid later is usually worth less than a pound paid now. Part of that is timing. Part of it is risk.

You wait longer, you carry uncertainty, and things can change. The buyer may alter strategy. Key staff may leave. Market conditions may soften. The business may still perform well, but not in the exact way the earn-out measures.

Even where everyone acts fairly, delayed money has a lower present value. You cannot use it now, invest it now, or remove the same level of personal risk today. That is why proper valuation work adjusts for both probability and timing, rather than treating the earn-out at face value.

How earn-outs can close a valuation gap

Earn-outs can still be useful. If you think your business is worth £6m and the buyer thinks it is worth £5m, an earn-out can bridge the difference. You might agree £5m upfront, plus £1m if the business hits targets over the next 12 months.

That can get a deal moving. It can also help when the gap is driven by growth forecasts rather than disagreement over the current year.

But be clear-eyed about what is happening. The earn-out does not always increase value. Often, it simply shifts part of the risk from buyer to seller. For many owners, that sits inside the wider SME value gap explained, where the buyer questions how much of the forecast can be trusted.

The upsides and downsides for sellers and buyers

Earn-outs are one of those deal terms that can look fair to both sides, at least at first glance. The seller sees upside. The buyer sees protection. Both are right. Both can also be wrong if the drafting is weak.

Where sellers can benefit

For sellers, the attraction is obvious. An earn-out can support a higher total price, keep a cautious buyer in the process, and reward genuine momentum in the business.

If your forecasts are grounded in real trading, strong retention, and a credible pipeline, an earn-out may help you prove that the business is worth more than last year’s accounts alone suggest. Growth companies often use them for exactly that reason.

Where sellers can lose value

This is where many owners feel the sting. Once the deal completes, you may no longer control the levers that drive the target. The buyer might cut marketing, merge functions, move costs, or change pricing. None of that has to be dishonest to damage your earn-out.

Disputes also tend to start with definitions. What counts as revenue? Which costs sit in EBITDA? Are central overheads pushed down after the sale? If the wording is loose, friction follows.

Founder-led firms are even more exposed. If the buyer worries that relationships, sales, or delivery still sit too heavily with one person, they often use structure to protect themselves. That is why founder dependence reducing exit value often shows up not only in the multiple, but in the earn-out itself.

Why buyers like earn-outs, but still need to be careful

Buyers like earn-outs because they reduce upfront risk, protect cash flow, and tie price to actual post-sale performance. On a spreadsheet, that makes perfect sense.

Still, a bad earn-out can hurt the buyer as well. It can create conflict with the seller, distract management, and limit the freedom to integrate the business properly. If the buyer wants to change systems, reshape the team, or fold the company into a wider group, the earn-out can become a constant argument over whether those decisions affected the result.

A fair earn-out should support the deal, not poison the relationship after it closes.

What makes an earn-out fair, or unfair, in a valuation

The fairness of an earn-out is not only about how much is deferred. It is also about how the rules work in real life. A deal with 20 per cent held back can be fairer than one with 10 per cent held back, if the wording is tighter and the protections are better.

The metrics need to be clear and measurable

Vague targets are a problem waiting to happen. “Growth”, “improved profitability”, or “commercial progress” mean very little once money is on the line.

The better route is measurable definitions with locked accounting rules. If the earn-out uses EBITDA, both sides should know exactly how EBITDA is calculated, which costs are included, and whether accounting policies can change. If it uses revenue, the contract should say what counts as recognised income and how returns, discounts, or group sales are treated.

The time period should be short enough to stay realistic

Long earn-outs usually carry more uncertainty. More time means more scope for market changes, staff turnover, buyer strategy shifts, and plain old disagreement.

For most SMEs, shorter periods work better. In the current market, 12 to 24 months is common because it gives enough time to test performance without pushing the seller too far beyond the point of exit. Once the period stretches much longer, the value of that deferred money often drops in real terms, even if the headline figure stays the same.

Control, reporting, and protection against manipulation matter

A seller needs visibility after completion. That means regular reporting, access to relevant records, and a clear right to challenge the calculation. It also helps to set rules on how the buyer can run the business during the earn-out period, particularly where a sudden change could distort the target.

This is where a fair SME business valuation and a partner-led review from Consult EFC can make a real difference. You need to see what is guaranteed, what is conditional, and what risk still sits with you after the sale agreement is signed.

How to think about an earn-out when you are valuing your own business

When owners ask, “What is my business worth?”, they often mean one number. With earn-outs, one number is not enough. You need to separate certainty from possibility.

Ask what part of the price is actually certain

Two offers can carry the same headline price and have very different real value. This quick comparison shows why:

The headline is identical. The certainty is not. If targets are demanding, or the buyer controls the outcome, Offer B may be worth much less in practice.

Compare the offer against your business plan and forecast

An earn-out only makes sense if the targets line up with trading reality. Look at historic performance, seasonality, customer concentration, recruitment plans, and the effect of any owner handover. Then stress-test the numbers.

Don’t benchmark the earn-out against your best-case scenario. Benchmark it against a forecast you could defend in front of a buyer, a lender, or HMRC. A proper independent pre-exit valuation gives you a better base for that conversation than taking the buyer’s structure at face value.

Get the structure reviewed before you sign

Valuation, tax, and legal points all matter here. The sale price may look fine, but the mechanics can still damage your outcome.

Get the earn-out reviewed before heads of terms harden into a signed deal. If the target is unclear, the period is too long, or the buyer has too much freedom to alter the result, that needs fixing early. It is far easier to protect value before completion than to argue for it afterwards.

Headline price is not the same as value

Earn-outs do not automatically increase what a business is worth. They change how value is paid, when it is paid, and who carries the risk in the meantime.

That can be perfectly sensible where buyer and seller are close, but not quite aligned. Still, the only number that counts is the one you are likely to receive, on terms you can live with.

If you’re weighing an offer, look past the headline. Ask what is certain, what is conditional, and how much faith you should place in the rest.

Kishen Patel, BFP ACA Founder, Consult EFC · ICAEW Chartered Accountant

Over 12 years across Big Four audit, Investment Banking and corporate advisory. Kishen works with UK SMEs on valuations, exit planning, fundraising and financial strategy. ICAEW regulated. Big Four trained. Based in London.