# How an earn-out is paid over time in a deal How earn-outs defer part of the price, what triggers each payment, and how the deferred amounts are settled to the seller over time. --- ## How an earn-out is paid over time in a deal Every deal professional has sat across the table from a seller who heard a headline number and assumed they were going to receive it in full at closing. The earn-out is where that assumption breaks down. Earn-outs work by delaying the payment of a part of the total purchase price and making the payment contingent on the target company's post-acquisition performance. That deferred slice of consideration does not move on closing day. It moves later — if it moves at all — and only when specific, contractually defined conditions have been satisfied. Understanding the precise mechanics of how that money gets triggered, measured, calculated, and ultimately paid is not optional knowledge for anyone who closes business sales for a living. It is the difference between a seller who gets paid what they expected and a seller who spends two years in a dispute they were not prepared for. ## Why part of the price gets deferred in the first place Before getting into the payment mechanics, it is worth being precise about what an earn-out actually solves for, because the structure of the deferred consideration flows directly from the problem it is trying to solve. An earn-out is a contingent payment linked to the target's post-closing results. It allows the seller to receive an additional amount if agreed performance metrics are achieved, aligning part of the price with future success. This differs from deferred consideration, which is an unconditional portion of the price paid over time regardless of performance. Both structures appear in deals, sometimes in the same transaction, and a practitioner needs to understand the difference clearly. A seller note or installment payment is unconditional — the buyer owes it regardless of what the business does after closing. An earn-out is conditional — the buyer only owes it if the business performs. Earn-outs are particularly useful in situations where buyer and seller have different views on the business's future potential; where the seller remains involved in the business post-completion and can influence its performance; or where market or operational uncertainty makes payment of the full price upfront a risky deal for the buyer. Earn-outs give buyers and sellers a way to strike a deal without settling on the aggregate purchase price prior to the closing date. This can be especially helpful for buyers who are wary of a target business's economic outlook or trying to be judicious about future capital outlays. They offer certain comfort, knowing that if a company does not hit revenue targets, there will be some financial relief for the buyer. From the seller's perspective, the equation is different. The seller accepts deferred, contingent consideration because they believe the business will perform and the earn-out will pay. The right framework treats an earn-out as "upside on top of price," not as price. If you wouldn't accept the deal at the cash-only price, don't accept it at the headline cash-plus-earnout price either. That framing matters when advising a client on whether to accept a structure. Median realization rates of 50–70% suggest most sellers receive meaningful but partial earn-out payments. The variability is wide: some sellers receive 100% of the maximum, others receive zero. The variability is driven primarily by post-close business performance — which is genuinely uncertain — and secondarily by measurement and conduct mechanics, which are negotiable upfront. ## The earn-out period: how long the clock runs Instead of paying everything upfront, the buyer agrees to make earn-out payments if the company hits certain financial or operational targets during a set earn-out period — typically 12 to 36 months post-acquisition. Most earnout agreements span one to three years, although this is not a hard-and-fast rule. The earn-out period represents how long the seller remains accountable for performance metrics after closing. Shorter periods reduce the seller's risk exposure and uncertainty. Longer periods give buyers more confidence about business sustainability, but increase the seller's vulnerability to factors outside their control. The appropriate length depends on the business's stability, the buyer's risk tolerance, and the seller's willingness to remain involved. Per SRS Acquiom data, the median earn-out measurement period has trended upward in recent years. The direction matters to sellers. Every additional year the earn-out runs is another year the buyer controls the operational decisions that affect the metric. A two-year earn-out on revenue is a very different risk profile from a five-year earn-out on EBITDA. The period also determines the payment schedule. Annual measurement is the most common structure — the parties calculate performance at the end of each year and the buyer either pays or doesn't. Payment terms are usually structured in annual installments, triggered once performance targets are verified. Quarterly measurement exists, particularly in businesses with short operating cycles. Quarterly payments suit businesses with short operating cycles and stable performance patterns, providing sellers faster access to deferred consideration while increasing administrative burden on buyers. Semi-annual is relatively rare. The frequency of measurement should match the reporting cadence of the business, not just default to annual because that is common. ## What triggers a payment: the metric and the threshold This is the most consequential piece of the earn-out, and the most heavily negotiated. The earn-out threshold is the financial performance metric level that the business must achieve for the seller to receive a payout. Thresholds are typically based on the seller's projections for the business. Thresholds should be objective and measurable, plainly defined, and consistent with the character of the business. The principal metric categories — and their real-world implications — break down as follows. ### Revenue Revenue is the cleanest metric for an earn-out, and it is the seller's preferred ask in most deals. Revenue is cleanest because it is hardest to manipulate. Revenue-based earn-outs require careful definition of recognized revenue, particularly for software companies recognizing revenue over time or businesses with significant deferred revenue balances at closing. The measurement methodology should mirror the target's historical accounting policies to avoid artificial baseline shifts. The precision required here is often underestimated. What counts as revenue? Does it include revenue from new product lines introduced by the buyer? From customers acquired by the parent company and assigned to the target? From contracts that existed at closing but were renewed at different pricing? Each of those questions needs a written answer in the purchase agreement, because each one will be disputed otherwise. ### EBITDA EBITDA is the buyer's preferred metric in most private equity-backed deals, and it is the most dangerous terrain for a seller. EBITDA-based earn-outs expose sellers to significant risk because the new owners control expense allocation. They decide what corporate overhead gets pushed down to the business unit, how much to invest in marketing, what salaries to pay, and countless other decisions that affect EBITDA but may be outside the seller's control. The parties must precisely define the adjusted EBITDA calculation methodology, including treatment of integration costs, corporate overhead allocations, synergy adjustments, and one-time expenses. Earn-out provisions typically specify that EBITDA will be calculated using the same accounting principles and policies applied during the quality of earnings review, with explicitly enumerated adjustments. Sellers should never accept EBITDA without a long, written list of pre-agreed adjustments and a no-change-in-accounting-policy covenant. That covenant is not a formality. It is the primary protection against a buyer who reorganizes the chart of accounts after closing and suddenly discovers that a significant portion of group overhead needs to be allocated to the acquired business. ### Milestones Milestone-based triggers depend on achieving defined goals, such as completing a product rollout, entering a new market, or securing a strategic partnership. When tied to meaningful progress, milestones can provide flexibility while still aligning incentives between both sides. Milestone-based earn-outs are the cleanest because outcomes are typically binary and externally verified — FDA approval, contract award, regulatory clearance. When a regulatory body makes a decision, neither party has room to argue about whether the trigger was met. That binary certainty makes milestone earn-outs relatively dispute-proof compared to financial metric earn-outs, which is why they are the standard structure in pharmaceutical and biotech transactions. ### Customer retention Customer retention is standard in services businesses and requires a precise definition of "retained" — still purchasing? Still paying the same dollar amount? Same product mix? Disputes around customer retention usually turn on how the buyer reorganized the customer base post-closing. A buyer who merges the target's customer relationships into a new entity, renegotiates contracts under the parent's master pricing, or realigns account managers across the combined business can substantially alter the customer retention calculation without any intent to harm the earn-out — or, in some cases, with precisely that intent. ## The payout formula: binary, linear, and graduated structures Knowing the metric is only half of it. The formula that converts metric performance into a dollar payment is the other half. Under a binary or "all-or-nothing" payout formula, a lump sum is payable only upon the achievement of a stated target — for example, $10 million upon the launch of Product X. Binary payout formulas are more commonly found in earn-outs with non-financial milestones. A binary formula can incentivize the buyer or incumbent management to take actions to miss or achieve the threshold, as the case may be. A binary formula can also demotivate incumbent management when it becomes apparent that the business will not be able to achieve a required target. Given the negative incentives of a binary payout formula, sellers will try to negotiate a payout formula that is a percentage of the performance threshold — for example, "the annual payout shall equal 5 percent of adjusted EBITDA" — or a graduated payout formula. Graduated payout formulas are relatively uncommon, as buyers resist paying for performance that does not achieve the relevant target. To put this in concrete terms: a deal structure that pays $5 million if EBITDA hits $3 million is an all-or-nothing structure. Miss by $1 and the seller receives nothing. A graduated structure might pay $1 million per $1 million of EBITDA above $2 million, capped at $5 million. The seller receives something for partial performance, and the buyer pays proportionally for incremental results. That difference is not academic — it defines whether a seller who delivers 90% of target receives $0 or $4.5 million. Most earn-out caps fall between 25% and 100% of the at-closing consideration. A seller receiving $10 million at closing might have an earn-out capped at $2.5 million to $10 million, depending on risk allocation preferences and performance upside potential. In SRS Acquiom data, the median earn-out pool was 26% of total deal consideration, with a long tail of pharma and biotech deals where the contingent portion exceeded 100% of base consideration — a $50 million base with a $100 million milestone earn-out for FDA approval being a representative example. ## The settlement process: how a payment actually gets made Agreeing on the structure at signing is one thing. The mechanical process by which earn-out payments are actually calculated and paid after each measurement period is something practitioners need to understand in detail, because this is where deals fall apart. The parties should specify who will prepare the initial financial statements and calculations for the earn-out — whether that is the party in control of the business post-closing or an independent accounting firm — what participation, review, and objection rights the other party will have in the process and how and when they may be exercised, the timetable for the process, and how disputes will be resolved. The standard settlement mechanics work as follows. At the end of each measurement period — typically 30 to 90 days after the fiscal year closes — the buyer prepares a calculation statement showing the relevant metric and the resulting earn-out payment. At a minimum, the earn-out agreement should require the buyer to deliver periodic financial statements for the earn-out business unit, specify the accounting standards applicable to those statements, require the buyer to maintain records sufficient to verify the earn-out calculation, and deliver a formal earn-out calculation notice within a defined period after each measurement period ends. The seller then has a review period — commonly 30 to 45 days — to examine the calculation and raise objections. Audit and review rights should be tiered. An initial review period allows the seller to pose questions and seek corrections. If disagreements persist, the seller may engage an independent accountant to conduct a review or audit limited to the earn-out metrics. The agreement should allocate costs based on outcome — for example, loser pays or materiality thresholds — and should define the scope to avoid fishing expeditions. Without an express audit right in the purchase agreement, the seller has no contractual basis to demand access to the buyer's books and records to verify the earn-out calculation. Sellers should negotiate express audit rights before closing, specifying who can conduct the audit, what records are subject to review, the notice period required to trigger an audit, and how costs are allocated. If the parties cannot resolve a disagreement within the objection period, most well-drafted agreements escalate the dispute to an independent accounting expert. Parties often agree that any controversy will be referred to a third-party expert, typically one of the Big Four accounting firms, whose determination is final and binding. This is practical in theory, but in large transactions those firms are often conflicted — either because they advise one of the parties elsewhere or because they audit a related company. In such cases, the process can stall, leaving the parties in limbo until a suitable alternative is agreed. If the purchase agreement includes a mandatory arbitration clause for earn-out disputes, parties will likely resolve accounting-based disagreements through that process. The key advantage is subject-matter expertise: neutral financial professionals evaluate the disputed metrics, apply the agreed-upon calculation methodology, and issue binding decisions grounded in accounting standards rather than legal theory alone. The trade-off is limited appeal rights. Once the arbitrator decides, the result is generally final. Once the calculation is agreed — or adjudicated — payment typically follows within 5 to 10 business days. There is no universal standard here, but most agreements specify a payment deadline to prevent a buyer from delaying disbursement after the earn-out amount is determined. This is where the mechanics of settlement become operationally important for the deal professional managing multiple recipients. In deals involving a single seller, the path is straightforward: the buyer wires the agreed amount to the seller's designated account. In deals with multiple selling shareholders, a management team earn-out that is split across several people, or a situation where the sale proceeds are to be distributed according to a waterfall, the settlement process gets substantially more complex. Each payment must be apportioned correctly, and any error in the split creates its own dispute. When Shaka is part of the deal infrastructure, the earn-out distribution settles differently. The professional sets the recipient wallets and split percentages at the outset, and each earn-out installment — once the trigger conditions are confirmed — moves directly to each recipient in the pre-agreed proportions, in a single transaction, without manual reconciliation or a holding account in between. The deal closes the same way it was structured. ## What the buyer controls and why that matters Post-closing, the seller has a diluted or no role in managing the business and its accounting or in drafting the earn-out measurements. At the same time, the new owner may be incentivized by the earn-out mechanism to make decisions for the acquired business and its accounting with a possible intent to avoid making or reducing the earn-out payments to the seller. This is not an accusation — it is structural reality. The buyer who acquires a business inherits a thousand decisions that affect the earn-out metric. In negotiating commercial contracts, the buyer may have an incentive to structure deals with customers or suppliers in a way that defers revenue or accelerates costs. Disputes arise when buyers allocate corporate costs to the acquired business, implement operational changes that temporarily depress margins, or defer discretionary spending to reduce earn-out liability. Sellers argue that integration decisions outside their control should not reduce earn-out payments, while buyers contend that normalized EBITDA must reflect actual costs of operating the business within the combined entity. The seller would want to negotiate contractual protections, such as covenants from the purchaser on operating the target in the ordinary course of business, as well as seller information and consent rights. A general "reasonable efforts" covenant is difficult to enforce. Specific covenants — such as minimum headcount, marketing budget floors, customer assignment restrictions, and limitations on accounting method changes — are much easier to enforce and much harder for buyers to argue around. The covenants are not about distrust. They are about removing ambiguity from situations where the buyer's legitimate business interests and the seller's earn-out interests diverge. Both outcomes can be commercially rational from each side's perspective; the covenant creates a pre-agreed boundary. ## The tax dimension of earn-out payments The tax treatment of each earn-out installment is not simple, and it affects both what the seller actually nets and how the deal needs to be structured at signing. From a tax perspective, an earn-out can be viewed as contingent consideration that may be eligible for capital gain treatment, or as compensation for services subject to ordinary income rates and payroll taxes. The distinction often hinges on whether the buyer is paying for the business itself or for the seller's ongoing efforts after closing. When the seller continues to work in the company, tax authorities may question whether part of the earn-out reflects remuneration for personal services rather than payment for the shares. This potential reclassification — from capital gain to employment income — is one of the reasons earn-outs require careful structuring and documentation. For U.S. transactions, IRC § 453 offers taxpayers a way to defer the recognition of gains from certain property sales when payments extend beyond the year of purchase. Under the installment method, taxpayers are able to pay tax on their gains as payments are received rather than recognizing the entire taxable gain in the year of closing. For a seller receiving earn-out payments over three years, this can meaningfully reduce the present value of the tax liability. Earn-outs paid more than 12 months after close trigger imputed interest under IRC Section 1274, with a portion of payment taxed as ordinary income. That imputed interest is not visible in the earn-out formula, but it reduces the after-tax value of each payment. Deals with long earn-out periods — three years or more — need to be modeled with this cost explicitly included. The tax character, timing, and reporting of each earn-out payment often turn on subtle details in the transaction documents, the actual performance metrics, and the seller's post-closing involvement. Even when the economics appear straightforward, the tax treatment is rarely simple. This is not a place for generic advice. Every seller should have a tax advisor specifically reviewing the earn-out structure before signing. ## The dispute problem and how to reduce it Earn-outs often prevent disagreements during the negotiation of the deal price only to result in post-closing disputes over the earn-out itself. That pattern is well-documented and predictable. Whether certain revenue and earnings targets have been satisfied may seem simple enough — a matter of basic accounting — but complications can arise when the buyer takes control of the business and makes strategic or opportunistic changes. The buyer may change accounting practices such as revenue recognition and reserves, or take other steps such as changing customer mix or pursuing a different line of business that impacts earnings. Ambiguous definitions account for most post-closing conflicts. Terms like "net income" or "adjusted EBITDA" carry different meanings depending on which exclusions, adjustments, and one-time charges each party believes should apply. Clear, specific, business-contextualized drafting — and strict adherence to the procedures set forth — are critical. Earn-out provisions should be drafted with as much clarity and specificity as possible, and the provisions and procedures should be contextualized for the specific business at issue. The earn-out provisions should specify the accounting methodology — stating clearly whether calculations follow GAAP, non-GAAP, or a custom approach — along with inclusions and exclusions that list every adjustment, one-time charge, and intercompany allocation that applies or does not apply to the earn-out calculation. The single most effective clause a practitioner can push for on the seller's side is a worked example embedded in the purchase agreement itself. A sample calculation using the prior year financials, run through the exact earn-out formula with each line item labeled, is the single most effective tool for preventing definitional disputes. It shows exactly how the formula applies rather than describing it abstractly. ## Earn-out versus deferred consideration: the structural distinction in practice Many deals combine both mechanisms, which creates additional complexity that professionals need to track separately. Deferred consideration represents a portion of the purchase price that is fixed and payable over time, without depending on future performance. It is usually less contentious, commercially and from a tax perspective, because the amount and timing are predetermined. Earn-outs, by contrast, are conditional payments tied to the company's results after closing. In a typical mid-market transaction, a deal might be structured as $6 million at closing, a $1 million seller note payable in 24 months regardless of performance, and an earn-out of up to $2 million tied to two-year EBITDA. The seller note is a receivable. The earn-out is a contingency. The seller, their accountant, and their attorney need to treat them differently in every respect: tax reporting, risk assessment, and enforcement mechanics. Common formats include earn-outs linked to revenue or EBITDA targets, installment notes with fixed schedules, and holdbacks used to secure indemnities. Each structure balances risk transfer, tax timing, and lender consent differently. Holdbacks deserve specific mention because they are sometimes confused with earn-outs in smaller deals. A holdback is generally a portion of the closing consideration withheld to secure the seller's indemnification obligations — not a performance-contingent payment. If the seller breaches a rep and warranty, the buyer may draw down the holdback. If no breach occurs, the holdback releases to the seller at a predetermined date. The trigger is legal compliance, not business performance. ## What a well-structured earn-out looks like in practice To make this concrete: consider a manufacturing business selling for a total consideration of $15 million. The buyer and seller disagree on valuation — the buyer values the business at $12 million on current trailing EBITDA of $2 million, while the seller projects forward EBITDA of $2.8 million based on two new contracts under letter of intent. The structure that closes the deal: $11 million at closing, with a two-year earn-out capped at $4 million, structured as follows. If Year 1 adjusted EBITDA exceeds $2.2 million, the seller receives 4x the excess above $2.2 million, up to $2 million. The same formula applies in Year 2. Adjusted EBITDA is defined in a six-page exhibit with specific treatment for integration costs, management fees charged by the parent, and a cap on overhead allocations at the same percentage as the trailing 12 months preceding closing. The buyer covenants to maintain the business unit as a separate reporting entity for earn-out measurement purposes for 24 months. The seller has a right to appoint an independent accountant to review the earn-out calculation within 30 days of receiving the buyer's statement, with cost allocation to the buyer if the independent review reveals an error exceeding $50,000. That structure is not perfect — no earn-out structure is — but it allocates risk deliberately, defines the trigger with precision, and creates an enforcement mechanism. The seller knows what they are getting at closing and what they are betting on afterward. The earn-out period ends, the final year closes, the numbers are verified. At that point, the payment is determinate and final. How cleanly that payment reaches the seller — and how quickly it splits to any co-sellers, founding shareholders, or management recipients — depends entirely on the infrastructure the deal team put in place. The deal professional's job was to build the structure. The payment infrastructure is what determines whether the money lands the way the deal was written. An earn-out is ultimately a bet on the future dressed up as a purchase price. The professional who understands its mechanics — how the trigger is constructed, how the measurement runs, how the settlement gets done, and where the disputes emerge — is the one who can protect both sides from the version of this instrument that looks good at signing and falls apart at year two. The headline number is what gets everyone to the table. The payment mechanics are what determine whether anyone leaves satisfied.