You have agreed on a price. The buyer says they want to include an earn-out. You nod along but are not entirely sure what that means for your payout. This is one of the most misunderstood parts of small business acquisitions, and sellers who do not understand how earn-outs work often end up collecting far less than they expected when the deal was signed.

Here is everything you need to know about earn-outs: what they are, how they are structured, when they make sense, and when you should push back hard.

What Is an Earn-Out?

An earn-out is a deal structure where a portion of the purchase price is paid to the seller over time, contingent on the business hitting certain performance targets after closing. Instead of receiving 100% of the purchase price at closing, the seller receives a portion upfront and the rest later, if and when specific milestones are met.

Example: A buyer and seller agree on a $1.5 million valuation. The buyer offers $1 million at closing and $500,000 as an earn-out, payable over two years if the business maintains $400,000 in annual revenue. If the business hits the target, the seller collects the full $1.5 million. If it misses, the seller collects less or nothing on the earn-out portion.

Earn-outs bridge a valuation gap. When a buyer and seller cannot agree on what the business is worth right now, particularly when the seller is projecting future growth the buyer is not ready to pay for upfront, an earn-out lets both sides bet on the future together.

How Earn-Outs Are Typically Structured

The Performance Metric

Earn-out payments are tied to a specific, measurable metric. The most common options are:

• Revenue: Simple and easy to verify, but a buyer can hit revenue targets while still losing money
• Gross profit: Better than revenue because it accounts for cost of goods, but still allows expense manipulation
• EBITDA: The seller’s preferred metric because it is harder for a buyer to manipulate through expense allocation
• Customer retention: Common for subscription or service businesses where the value is in the client base
• Specific milestones: Product launches, contract signings, or geographic expansion

Sellers should push for EBITDA or gross profit over revenue whenever possible. A buyer who acquires your business and starts loading it with corporate overhead, allocated IT costs, or management fees can dramatically reduce reported EBITDA, all while your revenue looks healthy. If your earn-out is tied to EBITDA, insist on a clearly defined formula that excludes post-acquisition expenses the buyer controls.

The Payment Period

Most earn-outs in small business deals run 12 to 36 months. Longer periods increase your risk because more can go wrong and because the buyer has more operational control over the outcome the longer you wait. As a seller, you want the earn-out period as short as possible. Two years is common. Three years is long. Anything over three years is almost always unfavorable for sellers.

Threshold vs Tiered Structures

A threshold earn-out pays nothing below a target and the full amount above it. A tiered earn-out pays proportionally based on performance. Sellers generally prefer tiered structures because they get something even if they fall short of the full target. Buyers sometimes prefer threshold structures because they create cleaner accounting. Know which structure you are agreeing to and model out multiple scenarios before you sign.

When Earn-Outs Make Sense to Accept

Earn-outs are not inherently bad. There are legitimate situations where accepting one is the right move:

• You are confident in the projections. If you believe the business will absolutely hit the targets and the earn-out lets you get a higher total price, it can be a fair trade.
• The deal would not close otherwise. In some cases, an earn-out is the only way to bridge a valuation gap and get the deal done. A bird in hand at closing plus a realistic earn-out may be better than walking away from the table.
• You are staying involved. If you are remaining with the business for a transition period and maintaining some operational control, you have more influence over whether the targets are hit.
• The metric is clean and hard to manipulate. If the earn-out is tied to revenue from existing customers, with no ability for the buyer to exclude customers or reclassify revenue, the risk of gaming is lower.

When to Push Back Hard on an Earn-Out

Sellers should resist earn-outs in several situations:

• You are leaving the business entirely. If you have no ongoing role, you have no control over outcomes. Your earn-out payment depends entirely on how the buyer runs the business.
• The metric is EBITDA and the buyer can add overhead. A buyer who allocates corporate costs to your business unit after closing can destroy EBITDA on paper while the underlying business performs well.
• The earn-out represents a large percentage of total price. If more than 30% to 40% of your purchase price is contingent, you are taking on significant deal risk. Fight to bring more to closing.
• The targets are unrealistic. Some buyers intentionally set earn-out targets just high enough to be unlikely. If the targets require performance significantly above historical trends, the earn-out may be a way to offer a high headline price they never intend to fully pay.

The BizBuySell platform publishes quarterly transaction reports that track deal structures, including how often earn-outs appear in small business deals and at what percentage of total deal value. It is useful context when you are evaluating whether a proposed earn-out is market-standard or unusual.

Protections to Negotiate Into an Earn-Out

If you accept an earn-out, negotiate these protections into the agreement:

• Defined accounting methodology: Specify exactly how the performance metric will be calculated, including what expenses are excluded
• No material change clause: The buyer cannot radically change the business strategy in ways that undermine the earn-out targets without seller consent
• Audit rights: You have the right to review the financial statements that determine your earn-out payment
• Acceleration on sale: If the buyer sells the business before the earn-out period ends, the full remaining earn-out is paid immediately
• Dispute resolution mechanism: A neutral third-party accountant (not the buyer’s CPA) resolves any disputes over earn-out calculations

These protections are standard asks in any serious negotiation. If a buyer refuses all of them, that tells you something about how they intend to handle the earn-out period.

Before you sign anything, make sure you understand how this fits into the full deal structure. Our overview of M&A for small business walks through the full acquisition process, and our guide on Letters of Intent explains how earn-out terms typically get introduced and locked in before the full purchase agreement is drafted.

The Short Version

An earn-out is a seller financing the gap between what a buyer is willing to pay today and what the seller believes the business is worth. It is not free money. It is contingent money, and the contingency is controlled, in part, by the person writing the checks. Go in with clear eyes, negotiate strong protections, and make sure the earn-out period is as short as possible with targets that are genuinely achievable given realistic assumptions.

Sellers who understand earn-outs negotiate them well. Sellers who treat them as a formality often collect far less than the headline number they celebrated when the deal was announced.

Related Reading: How to Value a Small Business

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