An earnout in M&A makes part of the purchase price contingent on the acquired business reaching specified post-closing targets. It can bridge a valuation gap, but only if the agreement defines the metric, calculation policies, operating authority, reporting process, and remedies with enough precision to survive changes after closing. Otherwise, the parties may postpone a pricing disagreement rather than resolve it.
Buyers and sellers should underwrite two transactions: the transfer at closing and the operating relationship continuing through the earnout period.
What Is an Earnout in M&A?
An earnout is additional consideration payable after closing if defined financial or operational conditions are satisfied. Common measures include revenue, gross profit, EBITDA, customer retention, unit sales, regulatory approval, product launch, or another milestone. The agreement may use a threshold, stepped payments, a percentage of performance above a threshold, a maximum payout, or a combination.
Earnouts can help when buyer and seller disagree about forecasts, when recent growth has not yet appeared in historical results, or when value depends on a future event. They also reduce cash paid at closing and can keep sellers involved. Those benefits come with a basic conflict: the buyer usually controls the business after closing while the seller retains an economic interest in how it is operated and measured.
A public SEC-filed set of earnout provisions illustrates how detailed the mechanism can become. It defines the calculation, requires an earnout report, imposes an aggregate cap, gives the seller representative 30 days to object, and establishes a period for resolving disputed items. It is an example of negotiated drafting, not a template for another transaction.
The Payment Formula Must Work Without Interpretation
The agreement should permit an independent reviewer to reproduce the earnout from source records. Define the performance period, measurement date, currency, accounting records, formula, threshold, rate, cap, floor, rounding, payment date, and partial periods. Include examples testing performance below, at, and above each breakpoint.
Revenue is visible but still requires rules
Revenue-based earnouts may appear objective because they avoid expense allocations. They still require decisions about recognition timing, returns, rebates, discounts, bundled products, intercompany sales, deferred revenue, discontinued customers, bad debt, foreign currency, acquisitions, and sales transferred to another buyer entity.
EBITDA connects to profitability but creates more adjustment risk
An EBITDA earnout should identify the controlling accounting policies and every permitted adjustment. Questions commonly involve owner compensation, corporate overhead, shared services, integration costs, management fees, transaction expenses, new leases, hiring, research, marketing, reserves, extraordinary items, and costs imposed by the buyer.
Primior’s quality of earnings preparation guide explains why recurring earnings, unsupported add-backs, revenue recognition, customer concentration, and owner-related expenses should be resolved before a sale process advances. The earnout should begin with a reconciled historical baseline rather than introduce a new definition after closing.
Milestones must identify objective evidence
A milestone tied to a permit, approval, product release, contract, location opening, or customer event should specify the responsible party, required standard, deadline, evidence, cure period, and treatment of partial achievement. “Commercial launch” or “successful completion” can be disputed if the agreement does not state what those terms mean.
Operating Control and Earnout Economics Must Match
The parties should list the decisions that can materially influence the metric. Depending on the business, those may include pricing, staffing, compensation, marketing, capital spending, product timing, customer assignment, inventory, vendor selection, debt, acquisitions, facility closure, integration, and the transfer of revenue or cost to an affiliate.
A seller who has no post-closing control may seek operating covenants, access to information, separate books, minimum funding, restrictions on affiliate allocations, consent rights over specified actions, or acceleration after a sale or shutdown. A buyer generally needs flexibility to operate and integrate the acquired company. The agreement must define that boundary rather than assume both sides share the same understanding of ordinary operations.
The March 16, 2026 Delaware Court of Chancery opinion in Fortis Advisors v. Krafton demonstrates the significance of expressly negotiated control rights. The court found breaches involving termination and operational control, ordered specific performance, and extended the base earnout period by the duration of the improper ouster. The result turned on that agreement and record; it does not establish a universal earnout remedy.
Business owners and acquisition teams structuring contingent consideration can work with Primior to connect valuation, earnings quality, capitalization, operating control, and transaction execution alongside qualified legal, tax, accounting, and financial advisers.
An Earnout Calculation Scenario
Assume a buyer pays $18 million at closing and agrees to an earnout of up to $6 million over two years. For each year, the seller receives 50% of EBITDA above $3 million, capped at $3 million annually.
In year one, the acquired business reports $6.4 million of EBITDA before new corporate allocations. The preliminary payment is:
($6.4 million EBITDA – $3 million threshold) × 50% = $1.7 million.
The buyer then allocates $900,000 of centralized technology, insurance, human-resources, and executive costs to the acquired business. If every allocation is permitted, EBITDA becomes $5.5 million and the payment falls to:
($5.5 million adjusted EBITDA – $3 million threshold) × 50% = $1.25 million.
The allocation changes the earnout by $450,000. That variance does not prove either calculation is correct. The agreement must decide whether post-closing corporate allocations are allowed, how they are measured, whether new services produce offsetting savings, and which evidence controls.
The scenario also shows why an earnout cap is not equivalent to cash. A maximum $6 million earnout should not be presented as $6 million of certain sale proceeds. Sellers should model zero, partial, and full payment cases, together with tax, time value, collection, employment, and dispute costs. Buyers should model liquidity for the maximum contractual payment even when management expects a lower outcome.
Build the Reporting and Objection Process Before Closing
The agreement should identify who prepares the earnout statement, delivery deadlines, access to books and personnel, record-retention obligations, the review period, permitted objections, and payment timing. Monthly or quarterly reporting during the measurement period can expose a disagreement while evidence and corrective options remain available.
Separate calculation disputes from contract disputes. An independent accountant may be suited to accounting-policy, classification, or mathematical issues within a defined range. A court or arbitrator may be needed to interpret operating covenants, bad-faith allegations, access rights, or a disputed definition. The documents should state the decision-maker’s authority, evidentiary limits, fees, finality, and available remedies.
Earnout reporting should also reconcile with the closing balance sheet. Primior’s working capital adjustment framework explains why account definitions, reserves, cutoff rules, and accounting hierarchies must be settled before the post-closing calculation. The same dollar should not be captured once through working capital and again through the earnout.
Plan for Integration, Resale, and Unexpected Events
Earnout terms should address what happens if the buyer combines entities, transfers customers, changes the business model, discontinues a product, acquires a competing company, sells the acquired business, replaces management, or experiences a force majeure event. The answer may be continued measurement, a substitute calculation, acceleration, deemed achievement, tolling, or termination. Each choice changes risk allocation.
Employment and sale consideration should also remain conceptually separate. If payment depends on continued employment or future services, the legal, accounting, and tax treatment may differ from contingent purchase price. Compensation, noncompetition, rollover equity, indemnification, escrow, working-capital adjustments, and earnouts should be reviewed as one economic package without assuming they receive identical treatment.
For buyers backed by an investment vehicle, Primior’s private fund due-diligence controls provide a useful governance lens: material calculations need defined owners, source records, independent review, conflict controls, and escalation procedures.
Tax and Accounting Conclusions Require Separate Analysis
The IRS Publication 537, updated April 30, 2026 for the 2025 tax year, explains that a contingent payment sale exists when the total selling price cannot be determined by the end of the sale year. It also states that a sale of an entire business for one overall price is not treated as the sale of one asset and that consideration must be allocated among asset classes.
Form 6252 and the contingent-payment regulations address reporting mechanics, including transactions with and without a stated maximum selling price. Actual treatment depends on deal structure, asset allocation, payment terms, employment conditions, interest rules, entity type, basis, and taxpayer facts. An earnout should not be structured from the payment formula alone.
Buyer accounting also requires attention. A public-company acquisition note filed with the SEC reports a $25.5 million acquisition-date fair value for contingent consideration with a $111.4 million maximum. This illustrates why the contractual cap, expected payment, accounting fair value, and eventual cash settlement are different amounts.
Treat the Earnout as a Second Closing
A disciplined earnout in M&A defines the performance target, protects the integrity of the measurement, matches operating authority with economic exposure, and creates an executable reporting and dispute process. The payment should be modeled as contingent value, not assumed proceeds, while the maximum obligation should remain visible in the buyer’s capital plan.
Owners, investors, and acquisition teams can work with Primior to evaluate contingent consideration, transaction economics, capital requirements, and post-closing controls with independent legal, tax, accounting, valuation, and other professional advisers.
This article is provided for general informational purposes only and does not constitute investment, legal, tax, accounting, valuation, employment, financial advisory, or other professional advice, an offer to sell, or a solicitation of an offer to buy any security or investment product. Earnout rights, calculations, remedies, tax treatment, and accounting depend on the negotiated documents, transaction structure, facts, parties, jurisdiction, and current law. All investments involve risk, including possible loss of principal.
