Ecommerce Earnouts in Acquisitions: How They Work and How to Protect Yourself

An ecommerce earnout is a part of the purchase price that the buyer pays only if the brand hits agreed targets after closing, usually measured on revenue or gross profit over one to three years. It lets a seller collect a higher total price when the buyer doubts that recent growth will hold, but the deferred money is at risk once the buyer controls the store, the ad accounts and the inventory budget.

This guide explains how earnouts are built in Shopify, Amazon and multichannel deals, which metrics suit online brands, a worked example with the math, and the contract terms that protect the seller.

Key Takeaways

• An earnout is contingent consideration: money you earn after closing, not money you are owed regardless of results.
• In the private deals tracked by SRS Acquiom’s 2025 Deal Terms Study, about one in five non-life-sciences transactions in 2024 included an earnout, and the median earnout potential was 31% of the closing payment.
• Gross profit is usually a fairer metric for an online brand than EBITDA, because the buyer cannot reduce it by loading the business with its own overhead.
• Graduated payouts, monthly reporting, operating covenants and acceleration on a resale or default protect sellers far better than a single all-or-nothing target.
• Value an earnout at a discount. Judge whether the cash at closing is acceptable on its own before you count on the deferred amount.

What Is an Earnout in an Ecommerce Sale?

When a buyer and a seller disagree about what a brand is worth, an earnout splits the price into two parts: a fixed amount paid at closing and a contingent amount paid later if the business performs. Accountants call the second part contingent consideration. Lawyers usually call the clause that defines it the earnout provision.

The disagreement is common in online retail. A brand that grew 60% last year after a viral product, a new Amazon category or a TikTok moment looks very different to a seller, who sees a new baseline, and to a buyer, who sees a spike. An earnout lets the buyer pay for proven earnings now and for the rest only if the growth turns out to be durable.

Earnouts are one of several ways to defer part of a price. Our ecommerce business brokers see them most often in larger brand sales to strategic acquirers and private equity groups, and less often in smaller deals funded with SBA loans, where lender rules shape how the seller can be paid after closing.

When buyers propose an earnout

• Recent, steep growth. The trailing twelve months are much stronger than the year before, and the buyer will not pay a full multiple on the new number.
• Concentration. One hero SKU, one channel or one supplier drives most of the profit.
• Founder dependence. The owner runs product development, influencer relationships or wholesale accounts personally, and the buyer wants an incentive for a smooth handover.
• Unproven assumptions. A new product line, a retail launch or a subscription program is in the forecast but has little history yet.
• Financing gaps. The buyer cannot raise all of the cash at closing and uses the earnout to bridge the difference.

How an Ecommerce Earnout Is Structured

Every earnout agreement answers the same five questions. The quality of the answers decides whether the seller is ever paid.

1. Metric. What is measured: revenue, gross profit, contribution margin, EBITDA, units sold or a milestone such as a retail launch.
2. Measurement period. How long the earnout runs and how it is divided, for example two annual periods or eight quarters.
3. Targets and payout curve. The threshold at which payment starts, the level at which it is fully earned, and whether the curve is graduated or a cliff.
4. Cap and floor. The maximum the seller can earn, and sometimes a guaranteed minimum.
5. Accounting and dispute rules. How the metric is calculated, who prepares the statement, how the seller reviews it and who resolves a disagreement.

What the market data shows

The most detailed public figures come from SRS Acquiom, which administers private-target acquisitions and publishes an annual study of their terms. Its 2025 study, covering deals that closed from 2022 to 2024, reported for non-life-sciences transactions:

• Earnouts appeared in 21% of deals in 2022, 33% in 2023 and 22% in 2024.
• The median earnout potential was 31% of the closing payment in 2024.
• Revenue was the most common metric (65% of earnout deals in 2024), while earnings or EBITDA appeared in 13%, and many deals used more than one metric.
• In 76% of 2024 earnout deals, the last earnout period ended more than a year after closing. SRS has described the median earnout period as 24 months.

SRS has also reported that earnouts in its data paid out about 21 cents per dollar of potential value and were contested at least 28% of the time. Its dataset is weighted toward larger, often investor-backed companies, so treat these numbers as a reference point rather than a forecast for a $2 million Shopify brand. The direction is still clear: a seller should not assume the full earnout will arrive.

Choosing the Right Earnout Metric for an Online Brand

The metric matters more than the headline amount. The wrong one lets ordinary post-closing decisions erase your payout without anyone acting in bad faith.

For most physical-product brands, gross profit tied to the brand’s own SKUs is the cleanest compromise. It rewards real sales at real margins, and it sits above the operating costs that a buyer with several brands tends to share across its portfolio. If the earnout uses EBITDA or SDE, list every cost that is excluded, the way you would recast a P&L for add-backs buyers accept, and attach a sample calculation to the purchase agreement.

Ecommerce details that change the number

• Which sales count. Define the brand by SKUs, ASINs, domains and trademarks, so revenue still counts if the buyer moves listings into its own Amazon account or relaunches the store on a new domain.
• Returns and chargebacks. Agree whether the metric is gross or net of refunds, and how a late return reserve is handled.
• Marketplace fees. Amazon referral and FBA fees change over time. Decide whether fee increases the seller could not control are adjusted out.
• Inventory decisions. If the buyer under-orders before Q4, stockouts can sink a gross profit target. The closing side is covered in our article on how stock is treated when an online brand changes hands; the earnout needs a commitment on post-closing stock as well.
• Seasonality. Measurement periods should cover full years or compare like-for-like periods, so a target is not judged on a quarter without the holiday peak.

Worked Example: A Graduated Earnout on Gross Profit (Hypothetical)

Every number in this example is made up for illustration; none of it is DealPipe deal data or a typical price.

A home goods brand sells through Shopify and Amazon. Trailing twelve-month revenue is $4.5 million and gross profit is about $2.0 million. The owner asks $3.6 million. The buyer believes last year’s growth came partly from a one-off retail promotion and offers $2.9 million at closing plus an earnout of up to $700,000, split into two annual payments of up to $350,000 each.

• Year 1 target: gross profit of $2.1 million. Nothing is paid below 90% of target ($1.89 million). Between $1.89 million and $2.1 million, the payment rises in a straight line from $0 to $350,000.
• Year 2 target: gross profit of $2.25 million, with the same 90% threshold (about $2.03 million) and the same $350,000 cap.

Suppose the brand earns $2.04 million of gross profit in year 1 and $2.30 million in year 2.

The year 1 math: ($2.04M minus $1.89M) divided by ($2.1M minus $1.89M) equals 0.714, and 0.714 times $350,000 is about $250,000. Missing the target by less than 3% costs nothing like the full payment under the graduated curve, while a cliff would pay zero. That single drafting choice is worth $250,000 in this example.

The example also shows why the cash at closing deserves the most attention. If the brand had stalled, the owner would have received $2.9 million. Ask yourself whether that number works before you negotiate the rest. Our guide to how buyers value an ecommerce business explains where offers like these usually start.

Earnout vs Seller Note vs Holdback vs Equity Rollover

Buyers often propose an earnout alongside, or instead of, other deferred terms. They carry very different risks.

A seller note is usually more certain than an earnout because it is a debt, not a bet. Seller holdbacks are different again: they secure the buyer against claims rather than pay for growth. When you compare offers, convert each one into an expected amount of cash and a date, not a headline price.

How to Protect Yourself in an Earnout Agreement

Once the deal closes, the buyer owns the store, the Amazon account or the entity, the ad accounts and the supplier relationships. The protections you negotiate before signing are the only control you keep.

1. Use a graduated curve. Partial payment from a threshold (for example 80% or 90% of target) avoids losing everything over a small miss.
2. Fix the accounting. Attach a worked calculation and state the cost definitions, the accounting basis and the data sources (Shopify, Amazon Seller Central, the 3PL and the bookkeeping system).
3. Get reporting and audit rights. Monthly or quarterly dashboards, access to the underlying reports, and the right to have an accountant review the annual statement.
4. Negotiate operating covenants. Commitments to keep listings live, keep the brand name, maintain a minimum ad budget or inventory level, and not divert sales to the buyer’s other brands. Courts read these clauses closely, so wording matters.
5. Add acceleration triggers. The full earnout, or a fixed portion, becomes payable if the buyer resells the brand, merges it, stops operating it, breaches the covenants or misses a payment.
6. Secure the payment. Escrow, a parent-company guarantee or a security interest reduces the risk that the money disappears if the buyer runs into trouble. Several heavily financed ecommerce acquirers went through restructurings in recent years, and unsecured deferred payments are the first to suffer.
7. Limit set-off. Buyers often want to deduct indemnity claims from earnout payments. Cap this right and require claims to be resolved first.
8. Define your role. If you stay on, agree your title, authority, time commitment and what happens to the earnout if the buyer ends your engagement without cause.
9. Agree a dispute process. A short review window, a meeting to resolve differences and an independent accountant as the final decision maker on calculation questions are faster and cheaper than litigation.

Red flags in an earnout offer

• The earnout is larger than the cash at closing.
• Targets require growth well above the brand’s own history.
• The metric is net income or EBITDA with no list of excluded costs.
• The buyer refuses reporting rights or any operating commitment.
• Payments depend on you staying employed, which can change both your leverage and the tax treatment.

How Earnout Payments Are Taxed

Treat what follows as general education rather than tax advice. Earnout tax treatment depends on the deal structure and your situation, so involve a CPA before you sign the letter of intent.

In an asset sale, an earnout usually creates what the IRS calls a contingent payment sale: one where the total selling price cannot be determined by the end of the tax year of sale. Such sales can often be reported on the installment method, so gain is recognized as payments arrive, under the special rules IRS Publication 537 sets out for these sales. Three points come up often in ecommerce deals:

• Inventory. The IRS states that sales of inventory cannot be reported on the installment method, so gain on the stock portion of the price is generally reported in the year of sale.
• Interest. If deferred payments carry little or no stated interest, part of each payment may be treated as interest rather than sale price.
• Compensation risk. When payments depend on the seller’s continued employment, tax advisers warn they may be treated as ordinary compensation income instead of purchase price.

How the total price is allocated among inventory, equipment, intangibles and goodwill also affects your tax bill, and that allocation should be settled together with the earnout terms.

When to Talk to a Broker

An advisor is most useful the moment an earnout shows up in a letter of intent, and earlier still if you can manage it. The time to set the metric, the curve and the protections is the LOI stage, when you still have competing interest and leverage. After exclusivity, every change costs negotiating capital.

A broker who runs a competitive process can often reduce the share of the price that is deferred, because a second buyer offering more cash at closing changes the conversation. If an exit is one or two years away and you want to sell your ecommerce business on strong terms, start with an honest view of value and a clear sense of how much cash at closing you need. Amazon-led brands have extra transfer issues, which our page on Amazon FBA brand sales covers.

On fees, our model is 100% performance-based. There is no retainer and no upfront charge; we earn a success fee only if the sale closes, and we set out the exact structure for each engagement during a free, confidential consultation.

Next Step

An earnout can turn a gap in opinion into a higher total price, but only when the cash at closing stands on its own and the agreement keeps the buyer accountable. Use our free business valuation calculator for a first estimate, and then schedule a confidential consultation to test any offer you have, or expect, against the structures above.