Earnouts and seller notes exist to solve the oldest problem in dealmaking: the buyer thinks the business is worth less than the seller does. Instead of walking away, the parties bridge the gap with future payments — some tied to performance, some simply financed over time. Used well, these tools save deals. Used carelessly, they start lawsuits.
This guide explains how earnouts and seller notes work, how they differ, the tax rules that shape them, and the specific terms that decide who actually wins. It is written for owners buying or selling a business who want to understand the paper before they sign it.
What You’ll Learn
- Why deals stall: the valuation gap
- How earnouts work
- How seller notes work
- Which one bridges the gap
- The tax angle
- 5 terms that decide who wins
- A simple example of the bridge
- The risks on each side
- Frequently asked questions
Why Deals Stall: The Valuation Gap
A valuation gap is the space between the seller’s number and the buyer’s number. Sellers price the business on its potential and their years of work; buyers price it on proven, transferable cash flow and the risk that it slips after closing. Both can be reasonable and still be far apart.
Rather than let the gap kill the deal, dealmakers push part of the price into the future. That is the shared job of earnouts and seller notes: keep the headline price acceptable to the seller while protecting the buyer from paying full value for performance that has not happened yet. The bridge you choose also interacts with structure — whether the deal is an asset sale or equity sale affects how the payments are documented and secured.
How Earnouts Work
An earnout is a portion of the price the seller earns only if the business hits agreed targets after closing — revenue, gross profit, EBITDA, unit volume, or a milestone like renewing a key contract. The buyer pays it out over a defined period, often one to three years.
The appeal is obvious: the seller gets paid for the upside they promised, and the buyer pays only for results that actually arrive. The danger is just as obvious. After closing, the buyer controls the business, and the buyer’s choices — how it invests, allocates costs, or books revenue — can move the very numbers the earnout depends on. That conflict is why earnouts generate so much litigation, a pattern we cover in this earnout dispute breakdown.
What a good earnout defines
- The metric: a number both sides can calculate the same way.
- The measurement: the accounting method, locked so it cannot be gamed.
- The control covenants: what the buyer must, and must not, do during the earnout period.
Earnouts show up constantly in industries where future value is uncertain — cannabis M&A is a prime example, where licensing timelines cloud valuation, as our colleagues at Cannabis Industry Lawyer see regularly.
How Seller Notes Work
A seller note is simpler: the seller finances part of the purchase price and the buyer repays it over time, with interest, like a loan from the seller. It is common in small-business deals where a bank will not fund the entire price, and it signals the seller’s own confidence in the business.
Unlike an earnout, a seller note usually does not depend on future performance — the buyer owes the money regardless. Terms cover the interest rate, the repayment schedule, security or collateral, and what happens on default. These payment mechanics sit alongside closing adjustments like the working capital adjustment that fine-tunes the cash price. A note also often sits behind the buyer’s primary lender, meaning the bank gets paid first if things go wrong.
Earnouts and Seller Notes: Which Bridges the Gap?
They solve related problems in different ways, and many deals use both. The quick contrast:
| Feature | Earnout | Seller Note |
|---|---|---|
| Payment depends on | Future performance | A fixed schedule |
| Who carries the risk | Seller (performance) | Seller (credit risk) |
| The main fight | How metrics are measured | Default and security |
| Best when | Sides disagree on upside | Financing falls short |
Choosing between earnouts and seller notes — or combining them — comes down to why the gap exists. If the disagreement is about future growth, an earnout fits. If the business is solid but the buyer is short on cash, a note fits.
The Tax Angle: Installment Sales and Imputed Interest
Deferring payments changes the tax picture. When a seller receives payments across more than one tax year, the transaction can qualify as an installment sale, letting the seller report gain as payments arrive rather than all at once. The rules live in IRS Publication 537, and the income is reported on IRS Form 6252.
Interest matters too. A seller note has to charge at least a minimum rate, or the IRS will impute interest and tax it anyway. Earnout payments raise thornier questions — part may be treated as purchase price and part as compensation, which are taxed very differently. That is why earnouts and seller notes should be modeled with a tax advisor before the structure is locked.
5 Terms That Decide Who Wins
The concept is simple; the terms are where deals are won and lost. Five to negotiate hard:
- The metric and its definition. EBITDA calculated whose way? Ambiguity here is the number-one source of earnout litigation.
- Operating covenants. What the buyer must do to run the business normally during the earnout — and what counts as sabotage.
- Acceleration. Does the earnout pay in full if the buyer resells the business or fires the team before the period ends?
- Security on the note. Collateral, personal guaranties, and where the seller stands relative to the bank.
- Set-off rights. Whether the buyer can reduce note or earnout payments to cover indemnity claims — a favorite buyer lever.
Buyers weighing these levers should also read our guide for business buyers on finding the landmines before closing.
A Simple Example of the Bridge
Numbers make it concrete. Suppose a seller wants $5 million and a buyer offers $4 million, convinced the last stretch of growth is unproven. Rather than split the difference and leave both unhappy, they build a bridge: $3.5 million in cash at closing, a $1 million seller note repaid over four years with interest, and a $500,000 earnout the seller collects only if revenue holds for two years.
The seller can still reach the full $5 million, but only part of it is guaranteed. The buyer protects its downside: if the growth is real, it happily pays the earnout out of the very performance that funds it; if it is not, the buyer never overpaid. That is the whole point of earnouts and seller notes — they let a deal close on terms that would otherwise be a stalemate. The catch is that every number in that structure needs a definition both sides will still agree on two years later.
The Risks on Each Side
For the seller, both tools mean getting paid later and trusting someone else with the money. An earnout depends on a business you no longer control; a note depends on a buyer who may default. Sellers reduce that risk with tight covenants, security, and acceleration triggers.
For the buyer, the risk is a dispute that poisons the relationship and lands in court. Vague metrics, missing covenants, and loose set-off language are how a clever bridge becomes an expensive fight. Both sides are better served by precise drafting up front — and by remembering that diligence, not the note, is where price should first be tested, as we explain in how due diligence reprices the deal.
Frequently Asked Questions
What is the difference between an earnout and a seller note?
An earnout pays the seller only if the business hits agreed post-closing targets, so the seller carries performance risk. A seller note is financing the buyer repays on a fixed schedule with interest, regardless of performance. Many deals use both.
Are earnout payments taxed as capital gains?
It depends on how they are characterized. Part of an earnout may be treated as additional purchase price and part as compensation, which are taxed differently. Installment-sale rules can also apply. Model the result with a tax advisor before signing.
Why do earnouts lead to lawsuits?
Because the buyer controls the business during the earnout and the seller’s payment depends on numbers the buyer can influence. Vague metrics and missing operating covenants are the usual triggers. Precise drafting prevents most disputes.
Should a seller note be secured?
Ideally, yes. Collateral, personal guaranties, and clear default remedies protect the seller if the buyer stops paying. A note often ranks behind the buyer’s bank, so the security terms deserve real attention.
Next Steps
Earnouts and seller notes can rescue a deal or wreck a relationship — the difference is in the drafting. Contact Howard East to structure or review the earnout and note in your transaction. If a deal has already gone sideways, our colleagues at Howard Law Group handle earnout and contract litigation.
This article is general information, not legal advice. No attorney-client relationship is created by reading it. Attorney Advertising.
