Earnout Agreements in Business Sales

Complete Guide: How They Work & How to Negotiate Better Terms

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Published: 2026 | Category: M&A Process | Read Time: 12 minutes

An earnout is when the buyer doesn't pay you the full purchase price at closing. Instead, they pay you additional money in the future based on business performance.

Earnouts are common in business sales. They give buyers confidence and let sellers participate in future growth. But they're also risky for sellers. Many earnouts go uncollected or get disputed.

This guide explains how earnouts work, why buyers use them, and how to negotiate to protect yourself.

30-50%

Typical Earnout as % of Deal

1-3 years

Typical Earnout Period

70%

Collection Rate (not 100%!)

What Is an Earnout?

An earnout is contingent payment tied to post-acquisition performance.

Simple Example:

• Business valuation: £2M

• Upfront payment at close: £1.4M (70%)

• Earnout potential: £0.6M (30%)

• Earnout condition: If EBITDA grows 20% in Year 2, seller gets full £0.6M earnout

The buyer essentially says: "I'll pay you less upfront, but if the business performs well, you get paid more."

Why Buyers Use Earnouts

• Risk Reduction: Don't pay full price if business underperforms post-acquisition

• Founder Incentive: Motivate founder to stay and help during transition (if applicable)

• Cash Flow: Spread payment over time rather than all at close

• Lower Initial Price: Earn discount by tying payment to performance

• Validation: Use earnout to confirm business value before paying full amount

Earnout Metrics: What Gets Measured?

Metric	How It Works	Risk to Seller
Revenue Target	If revenue reaches £2.5M in Year 2, earnout paid	Medium. Revenue is relatively objective but buyer can cut pricing to hit targets
EBITDA Target	If EBITDA reaches £600k in Year 2, earnout paid	High. Buyer controls costs and can cut margins to avoid paying
Customer Retention	If 90% of customers stay, earnout paid	Medium. Objective but buyer can alienate customers
Milestone Completion	If product launched or customer acquired, earnout paid	Low. Objective and verifiable
Product Metrics	If MRR (monthly recurring revenue) reaches £50k, earnout paid	Medium. Depends on how measured

The Earnout Problem: Manipulation Risk

Here's the danger: After buying your business, the buyer wants to pay you as little as possible. So they might:

• Cut pricing: Reduce customer prices to hit revenue target but miss EBITDA target

• Allocate costs: Assign corporate overhead to your business to reduce reported EBITDA

• Change accounting: Use different accounting policies to reduce earnings

• Delay investment: Cut marketing/R&D to hit short-term EBITDA targets

• Manipulate metrics: Define metrics in contract to their advantage

Real Example: Seller negotiates earnout based on EBITDA target. Buyer then loads business with corporate allocations and overhead, crushing EBITDA. Earnout not triggered. Seller gets nothing.

How to Protect Yourself: Negotiation Strategies

1. Minimize the Earnout Percentage

Goal: Keep earnout to 20-30% of deal value

Higher upfront payment = less risk. Negotiate for 70-80% at close, max 20-30% as earnout.

• Instead of: 50% cash, 50% earnout

• Negotiate: 75% cash, 25% earnout

• Result: You have majority of proceeds regardless of performance

2. Use Objective Metrics (Not EBITDA)

Best: Revenue or milestone-based

• Revenue-based: Objective, hard to manipulate, aligns with buyer

• Customer retention: Verifiable, tied to business quality

• Milestones: "Product launched," "100 customers acquired"—difficult to game

Avoid: EBITDA or profit-based

Too easy for buyer to manipulate through cost allocation and accounting changes.

3. Define Metrics Clearly in Writing

Be extremely specific:

• "Revenue" = invoiced customer sales (not ARR projections)

• "EBITDA" = GAAP basis, audited financials, no corporate overhead allocation

• "Customer Retention" = customers who didn't cancel (definition of "cancellation")

Include:

• Exact calculation methodology

• Who calculates (independent accountant?)

• Dispute resolution process

• Required documentation

4. Set Achievable Targets

Negotiate targets based on realistic forecasts:

• Use historical performance as baseline

• Include normal business growth expectations

• Account for seasonality and cycles

• Don't accept unrealistic stretch goals

Example:

If business grew 10% annually historically, earnout target of 50% growth in Year 1 is unrealistic and likely won't be met.

5. Limit the Earnout Period

Shorter is better:

• 1 year earnout = lower risk (easier to forecast)

• 2-year earnout = medium risk

• 3+ year earnout = high risk (too many variables)

Negotiate:

Maximum 2 years for typical business. Anything longer creates excessive uncertainty.

6. Get Escrow or Holdback

Don't rely on buyer to pay later:

• Require earnout funds held in escrow at closing

• Funds released when targets hit (instead of buyer writing check)

• Protects you if buyer goes bankrupt or refuses to pay

Or demand:

Buyer provides letter of credit guaranteeing earnout payment

7. Add Dispute Resolution Clause

Include in purchase agreement:

• If dispute on whether targets met, go to independent accountant

• Their determination is binding

• Buyer pays if they lose dispute by >10%

Without this:

You'll have to sue buyer to collect—expensive and uncertain

Real Earnout Example with Risks

Deal Structure:

• Business valuation: £3M

• Upfront payment: £1.8M (60%)

• Earnout: £1.2M (40%) if EBITDA reaches £400k in Year 2

Year 1 Results (Seller's perspective):

• Business growing well

• Forecasts show £420k EBITDA in Year 2

• Earnout looks achievable

• Seller feeling good about deal

Year 2 Reality (The Problem):

• Buyer allocates £200k in corporate overhead to your business

• Actual EBITDA reported: £220k (below £400k target)

• Earnout not triggered—seller gets ZERO additional payment

• Seller expected £1.2M more, instead gets £0

What Went Wrong:

• No clarity on how "EBITDA" defined

• Buyer could allocate costs as they wished

• No independent verification requirement

• No dispute resolution process

Is Earnout Worth It?

Generally: Try to avoid earnouts if possible. They create:

• Uncertainty (you don't know if you'll get paid)

• Risk (buyer controls the metrics)

• Complication (ongoing relationship with buyer)

• Legal costs (if disputes arise)

If you must accept earnout:

• Keep it <25% of total deal value

• Use revenue or milestone metrics (not EBITDA)

• Keep period to 1 year max

• Get detailed contract protections

• Use escrow or letter of credit

Key Principle: Cash in hand at close is worth more than a promise of payment later. Discount earnouts appropriately.

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