Buying a Small Business With an Earnout: Bridging the Valuation Gap Without Blowing Up Your Books

The seller wants $900,000 for the business. Your numbers say it is worth $650,000 today — but could easily be worth the full asking price if next year's growth plan actually lands. Neither of you is wrong; you just disagree about the future. An earnout lets you both be right: you pay $650,000 at closing, and the seller collects up to $250,000 more if the business hits agreed targets after the sale.

That simple bargain hides real accounting and tax complexity. As the buyer, you must record the earnout on your balance sheet on day one and revalue it every reporting period. As the seller, you must report contingent payments you have not received yet — and part of every check may be taxed as ordinary interest income even though you sold a capital asset. And both sides should know the sobering deal data before signing: earnouts appear in roughly one in four private-company acquisitions, yet across thousands of tracked deals they pay out an average of only about 21 cents on each promised dollar, with more than four in ten paying nothing at all.

This guide walks through how earnouts work in small-business deals, how buyers book them under ASC 805, how both sides handle the taxes, and the five drafting mistakes behind most earnout disputes.

How an Earnout Actually Works​

An earnout splits the purchase price into two pieces: a fixed amount paid at closing and a contingent amount paid later, only if the acquired business clears defined hurdles. The moving parts are:

• The metric. Revenue is the most common in small deals because it is hard to manipulate. EBITDA and gross profit appear often too, as do non-financial milestones such as retaining key customers, landing a contract, or obtaining a license.
• The measurement period. Typically one to three years after closing, sometimes with interim checkpoints that release partial payments.
• The payout formula. This can be all-or-nothing (hit $2 million in revenue, collect $100,000), tiered (a sliding scale per dollar of revenue above a threshold), or capped (up to a maximum regardless of how far targets are exceeded).
• The accounting rulebook. Which financial statements govern, whose accounting policies apply, and who gets to review the calculation — the section most small-deal agreements under-specify, and the section most disputes are fought over.

Earnouts are most useful when the buyer and seller genuinely cannot agree on value: a young company with one blockbuster year, a business whose biggest customer might leave, or a founder-led shop where results depend on relationships walking out the door. The earnout converts an argument about projections into a bet both sides can price.

The Buyer's Books: Contingent Consideration Under ASC 805​

If your company reports under US GAAP, you do not get to wait until the earnout pays out before recording it. Under ASC 805 (Business Combinations), contingent consideration is part of the purchase price and must be recognized at fair value on the acquisition date — day one, before a single target has been hit.

Day one: book the earnout at fair value​

Suppose you buy a plumbing supply distributor for $650,000 cash plus an earnout of up to $250,000 if revenue tops $3 million next year. Your valuation puts the fair value of that contingency at $150,000 — roughly a 60% probability of full payout, discounted to present value. Your acquisition entry looks like this:

• Debit the identifiable net assets acquired at their fair values (say $500,000)
• Debit goodwill for the remainder ($300,000, which is the $800,000 total consideration minus $500,000 of net assets)
• Credit cash $650,000
• Credit contingent consideration liability $150,000

Notice what happened: total consideration is $800,000, not $650,000. The earnout inflates goodwill on day one even though you may never pay it. If you use audited or reviewed statements, expect your CPA to scrutinize that $150,000 estimate closely — Monte Carlo simulations and probability-weighted scenarios are standard for larger earnouts, while smaller deals often use a straightforward expected-value calculation documented in a memo.

Private companies should also check whether they have elected the private-company alternative for goodwill, which amortizes goodwill on a straight line (generally over ten years) instead of testing it for impairment annually. Either way, the earnout liability itself follows the remeasurement rules below.

Every period after: remeasure the liability through earnings​

Here is the part that surprises first-time buyers. Under ASC 805-30-35, a liability-classified earnout must be remeasured to fair value at each reporting period until the contingency is resolved, with the change recorded in earnings — not as an adjustment to goodwill.

Continuing the example: six months later the distributor is crushing its revenue target, and the earnout's fair value rises from $150,000 to $220,000. You record a $70,000 loss in the income statement. If the business then stumbles and the fair value falls to $40,000, you record a $180,000 gain. These swings flow straight to net income and can dominate a small company's reported results in the earnout years — a real conversation to have with your bank if your loan covenants reference net income or EBITDA.

Only changes during the short measurement period (up to one year from closing) that reflect new information about conditions existing at the acquisition date adjust goodwill instead. Everything else — performance updates, revised forecasts, the passage of time — runs through profit and loss.

Liability or equity? The classification question​

Not every earnout is a liability. Broadly:

• Cash-settled earnouts are liabilities. If hitting the target means you pay cash, you owe a liability, and the remeasurement rules above apply. This covers the vast majority of small-business earnouts.
• Share-settled earnouts can be equity. If the contingency is settled in a fixed number of your own shares, it may qualify for equity classification — recorded once at fair value on day one and never remeasured. But variable-share settlements and obligations the issuer can settle in cash generally stay liabilities.

Classification follows the detailed tests in ASC 480 and ASC 815, and close calls deserve professional advice: misclassifying a liability as equity means missing every remeasurement, which is exactly the kind of error that restates financial statements.

The Buyer's Taxes: Earnout Payments Are (Mostly) More Purchase Price​

For federal income tax, an earnout payment is generally treated as additional purchase price when paid — not as a deductible business expense. What that costs or saves you depends on the deal structure:

• Asset deal. The closed payment gets allocated among the acquired assets under the residual method, matching the allocation on Form 8594 that you and the seller both file. Amounts landing on goodwill and other Section 197 intangibles are amortized over 15 years. Your day-one Form 8594 shows the fixed consideration; earnout payments paid later generally require amended allocations reflecting the increased price.
• Stock deal. The payment adds to your basis in the acquired stock, which mostly matters when you later sell — there is no current deduction at all.

One slice of each payment gets different treatment: imputed interest. Any deferred payment due more than six months after the sale is split by the tax law into principal and unstated interest under Section 483 (with Section 1274 lurking for debt-like instruments). The interest slice is ordinary income to the seller and an interest deduction for you. In a low-rate environment the amount is modest; when rates run high, it is a meaningful part of each check — and it must be computed whether or not your agreement mentions interest.

The mirror-image risk: if the selling owner stays on as an employee and the earnout is contingent on continued employment, the IRS can recharacterize some or all of it as compensation — deductible for you, but ordinary wage income (plus payroll taxes) for the seller instead of capital gain. Buyers sometimes prefer this; sellers rarely do. Either way, decide the intended character deliberately in the agreement rather than discovering it in an audit.

The Seller's Taxes: Installment Reporting on Money You Have Not Received​

Sellers usually report an earnout sale under the installment method (Section 453), which taxes gain as payments arrive rather than all at closing. You report the sale on Form 6252, computing a gross profit percentage in the year of sale and applying it to each payment as received. Gain then flows to Schedule D or Form 4797 depending on the assets sold.

Contingent payments complicate the math, and the rules turn on one question: can you compute a maximum sale price?

• Capped earnout (maximum determinable). You must compute your gross profit percentage as if you will receive the maximum — the full cap. Each payment is then part gain, part basis recovery under that percentage. If the earnout ultimately pays less than the cap, the shortfall generally produces a loss in the final year.
• Uncapped earnout (no maximum). You generally recover your basis first — early payments come back tax-free until basis is exhausted — and later payments are fully gain. Special allocation rules apply when the payment period is fixed versus open-ended.

Three more seller-side traps deserve attention:

1. Imputed interest is ordinary income. The same Section 483 slice the buyer deducts is interest income to you, taxed at ordinary rates. It is not capital gain, even though it arises from selling your business.
2. Big earnouts can trigger the Section 453A interest charge. If the face amount of your outstanding installment obligations exceeds $5 million at year-end, you owe an interest charge on the deferred tax — effectively the government charging you for the time value of the tax you postponed. Most small-business sellers land well under this line, but a large multi-year earnout can cross it.
3. Your Form 8594 must match the buyer's. In an asset sale, both sides file Form 8594 allocating the price across asset classes, and the allocations must agree. Negotiate the allocation schedule as part of the deal — sellers generally want more toward capital-gain assets, buyers toward depreciable or amortizable ones — rather than filing conflicting forms and inviting matching notices.

You can also elect out of the installment method entirely by reporting the full gain in the year of sale (simply report the sale without Form 6252). That rarely makes sense for an earnout — you would pay tax on money you may never receive — but it can be rational if you expect much higher future tax rates or have expiring losses to absorb the gain.

Five Earnout Mistakes Behind Most Disputes​

Deal-data providers consistently find earnout provisions among the leading causes of post-closing disputes, with roughly three in ten middle-market acquisitions experiencing some post-closing fight. The same drafting failures recur:

1. Tying the payout to a metric the buyer controls​

Net income sounds fair — pay the seller a share of actual profit — but after closing, the buyer sets salaries, allocates corporate overhead, chooses depreciation policies, and decides when to recognize expenses. Every one of those choices moves net income. Revenue-based earnouts avoid most of this because top-line sales are harder to engineer downward, which is why revenue dominates small-deal earnouts. If you must use a profit metric, define it exhaustively: which expenses are excluded, how related-party charges are capped, and which accounting policies are frozen.

2. Leaving the accounting rulebook blank​

"Calculated in accordance with GAAP" is not a rulebook — it is an invitation to argue. GAAP permits different revenue-recognition judgments, different inventory methods, and different bad-debt estimates. A workable agreement specifies: the exact financial statements that govern, whether the seller's historical policies or the buyer's policies apply, how policy changes during the earnout period are handled, and the seller's right to review workpapers with their own accountant. Freeze the policies as of closing wherever possible.

3. No operating covenants — or ones with no teeth​

The buyer now runs the business, and its incentives may point away from your earnout: diverting sales to another division, deferring marketing spend, or folding the company into a larger unit where its standalone results vanish. Sellers should negotiate affirmative operating covenants — commitments to operate the business in the ordinary course, maintain staffing or marketing levels, or keep separate books — rather than relying on an implied duty of good faith, which courts have repeatedly held does not rescue a poorly drafted agreement. Buyers, for your part, should resist covenants so tight they prevent you from running the company you just bought.

4. Conditioning payment on the seller staying employed​

Requiring the selling owner to remain employed to collect the earnout feels like sensible retention planning, but it hands the IRS its strongest argument for compensation recharacterization — converting the seller's capital gain into ordinary wage income with employment taxes. If retention matters, separate the instruments: a real employment agreement with real salary for the services, and an earnout that pays based on business results whether or not the seller is still in the building.

5. Agreeing on price but not on tax allocation​

Buyer and seller can shake hands on $800,000 and still file irreconcilable tax returns, because the buyer wants that $800,000 assigned to amortizable assets while the seller wants it on capital-gain property. Attach the allocation schedule — including how future earnout payments will be allocated — to the purchase agreement itself. The hour of negotiation it costs at closing is far cheaper than the dueling Forms 8594 and the IRS notices that follow.

A Practical Checklist Before You Sign​

If you are the buyer:

• Model the earnout's fair value before closing so the day-one liability and goodwill do not surprise you — or your lender.
• Confirm how remeasurement gains and losses will interact with loan covenants tied to net income.
• Decide deliberately whether any payment could look like compensation, and document the business purpose for the structure you chose.
• Set up a separate general-ledger account for the contingent liability and a calendar reminder to revalue it each reporting period.

If you are the seller:

• Discount the earnout aggressively in your own head: across the market, most of the promised dollars never arrive. Negotiate as much fixed consideration as the buyer can possibly pay.
• Insist on a precise metric definition, frozen accounting policies, audit rights, and operating covenants with specifics, not aspirations.
• Keep the earnout independent of any employment or consulting role you take on.
• Line up installment-sale reporting with your CPA before closing, including the Form 8594 allocation and any Section 483 interest computations.

Both sides: put the tax allocation, the accounting rulebook, and the dispute-resolution mechanics (who calculates, who reviews, who arbitrates, and on what timetable) in the signed agreement — not in a side letter you will draft later and never do.

Keep Your Deal Accounting Organized From Day One​

An earnout turns a one-day transaction into a multi-year accounting relationship: a liability to revalue, installment basis to track, interest slices to bifurcate, and allocation schedules to keep consistent across returns. That is exactly the kind of long-lived, audit-sensitive record-keeping that suffers in a spreadsheet and thrives in version-controlled books. Beancount.io provides plain-text accounting that gives you complete transparency and control over your financial data — no black boxes, no vendor lock-in. Get started for free and see why developers and finance professionals are switching to plain-text accounting.