Earn-out mechanisms have become one of the most practical pricing tools in Turkish M&A transactions, especially where the buyer and seller disagree on valuation, future growth, customer retention, EBITDA quality, or the real sustainability of the target’s business after closing. In simple terms, an earn-out allows part of the purchase price to be paid later if agreed post-closing performance targets are achieved. In Turkish deal practice, earn-outs are especially common in founder-led companies, technology businesses, distribution platforms, healthcare businesses, service companies, and targets whose value depends heavily on future contracts, management continuity, or uncertain growth projections. Turkish law does not contain a separate chapter titled “earn-out agreements,” but the Turkish Code of Obligations gives parties broad freedom to shape contractual consideration, remedies, and risk allocation, which is why earn-outs are generally built and enforced as contractual pricing mechanisms rather than as a special statutory institution.
That contractual freedom, however, should not be confused with unlimited freedom. The same Code states that contracts contrary to mandatory law, morality, public order, personality rights, or impossibility are null, and it also invalidates advance clauses excluding liability for gross fault. For Turkish M&A drafting, this means earn-outs are possible and often commercially useful, but they must be drafted with legal precision. A poorly drafted earn-out may not fail because Turkish law rejects the concept. It may fail because the formula is vague, the target performance metric is manipulable, the reporting framework is incomplete, or the seller’s protections are written so weakly that the buyer can steer the outcome after closing without clearly breaching the contract.
As a matter of legal inference, the combination of contract freedom and the Code’s acceptance that sale price may be determined by an objective standard rather than only by a fixed number supports the use of formula-based deferred consideration in Turkish acquisition agreements. The Code expressly states that, in sales, if the buyer definitively agrees to purchase without specifying the price, the sale is deemed made at the average market price at the place and time of performance. That provision is not an M&A earn-out rule as such, but it shows that Turkish law is familiar with determinable price structures and does not insist that every valid sale price be fully fixed in advance as a single static number.
Why parties use earn-outs in Turkish deals
The commercial logic of an earn-out is easy to understand. The seller says the company is worth more because its customer pipeline, product rollout, or profitability will increase after closing. The buyer says those projections are uncertain and does not want to pay the full optimistic price on day one. The earn-out bridges that valuation gap by splitting the price into an upfront amount and a contingent amount. In Turkish practice, this is particularly useful where the business is fast-growing, heavily dependent on the founder, exposed to market volatility, or in a sector where historical accounts do not fully capture future commercial upside. Because Turkish law leaves the content of contracts largely to the parties, earn-outs can be designed around revenue, EBITDA, net profit, gross margin, customer retention, regulatory milestones, product launches, or other agreed indicators, provided the clause is drafted clearly enough to be workable.
Earn-outs are also used because they can reduce immediate conflict around headline valuation while preserving deal momentum. Instead of forcing one side to “win” the pricing debate entirely at signing, the mechanism allows the price to respond to post-closing reality. That is often more commercially sensible than walking away from an otherwise viable Turkish transaction. Yet this same flexibility is also what makes earn-out disputes common after closing. The parties sign because they disagree less about whether value exists than about how to measure it later. If the contract does not solve that measurement problem with precision, the disagreement simply moves from negotiations into litigation or arbitration.
The legal basis under Turkish contract law
The starting point remains Article 26 of the Turkish Code of Obligations, which allows parties to determine the content of a contract freely within the limits prescribed by law. Article 19 adds another important principle: when identifying and interpreting the type and content of a contract, Turkish law looks to the parties’ true and common intention, rather than only to the labels or wording they used by mistake or to disguise their real purpose. For earn-outs, that is highly relevant. Turkish courts and tribunals will not be bound only by the word “earn-out” or by how the clause is marketed in the SPA; they will focus on what the parties actually intended the contingent price mechanism to do.
This interpretive rule has two consequences. First, if the clause is drafted carefully, Turkish law gives the parties room to create sophisticated deferred-price structures. Second, if the clause is internally inconsistent, Turkish decision-makers are likely to reconstruct the actual commercial bargain from the full agreement, negotiations, and surrounding structure rather than apply a purely formal label. In practice, this means Turkish earn-out drafting should avoid vague compromises that look acceptable at signing but cannot survive a serious interpretation fight later. An earn-out should be written as an operational rule, not as a political truce.
Earn-out clauses are only as strong as their formula
The single biggest legal risk in a Turkish earn-out is formula uncertainty. Turkish law is comfortable with determinable price structures, but determinability is not the same as ambiguity. If the earn-out depends on EBITDA, the agreement should define EBITDA. If it depends on revenue, the agreement should define whether it means booked revenue, invoiced revenue, cash-collected revenue, or revenue recognized under a specific accounting basis. If it depends on customer retention, the agreement should define what counts as the same customer, when churn is measured, how related parties are treated, and what happens if the buyer merges the target’s customer base into another group entity. Turkish law will respect a formula the parties created, but it will not manufacture a commercially sensible formula out of vague drafting if the contract fails to do so.
This problem is often underestimated in founder exits. The parties may agree informally on a concept such as “extra payment if business doubles” or “bonus if EBITDA target is hit,” but Turkish disputes rarely arise at that abstract level. They arise because one side says EBITDA should exclude extraordinary integration costs, management fees, or new group allocations, while the other side says those items are part of ordinary post-closing business reality. The legal lesson is that the formula must allocate accounting and operational assumptions before closing. If it does not, the earn-out becomes a dispute engine rather than a valuation bridge.
Accounting standards and information rights
Because most earn-outs depend on financial metrics, Turkish acquisition agreements should specify the accounting framework with unusual care. The agreement should state whether the earn-out accounts will be prepared under Turkish statutory accounting, Turkish Financial Reporting Standards, historic target accounting policies, IFRS-style management accounting, or another defined framework. It should also set a hierarchy in case those approaches conflict. Without this, the buyer can later argue that post-closing accounting must follow its group policies, while the seller can argue that the historic basis used to price the deal should continue during the earn-out period. Turkish law will not fill that gap with an M&A-specific default rule. It will resolve the dispute through ordinary contract interpretation, which is exactly what the parties should try to avoid.
Information rights are equally important. A seller cannot verify an earn-out without access to books, management accounts, underlying contracts, and the calculation methodology. If the agreement does not define reporting frequency, audit rights, management access, and the procedure for objecting to calculations, the seller may be left with only a high-level figure announced by the buyer. In Turkish practice, that asymmetry is one of the main triggers of post-closing disputes. An earn-out clause should therefore behave like a mini-reporting regime: it should state what statements will be delivered, when, with what supporting detail, and how disagreements will be escalated.
Buyer control after closing is the core earn-out risk
The most difficult problem in almost every earn-out is that the buyer controls the company after closing. That means the buyer typically controls budgeting, staffing, group allocations, pricing strategy, integration speed, financing costs, customer routing, and even the decision whether the target will remain a standalone profit center. A seller who agreed to a contingent price based on post-closing performance is therefore taking a legal and economic risk that the metric may be influenced by the very party who benefits from paying less. Turkish law does not forbid this structure, but it does mean the earn-out clause should include explicit conduct obligations if the seller expects genuine protection.
In Turkish drafting terms, those protections often include covenants that the buyer will operate the target in good faith, will not take actions primarily designed to defeat the earn-out, will maintain separate books for the earn-out business, will not divert customers or opportunities unfairly, and will not impose extraordinary or non-arm’s-length group charges inconsistent with the agreed methodology. These are not automatic rules under Turkish law; they are contractual protections that must be stated. Because Article 19 directs interpretation toward the parties’ real common intention, Turkish decision-makers can give real weight to such anti-manipulation language when it exists. When it does not, the seller’s position becomes much harder.
Seller protections should be specific, not moralistic
One recurring mistake in Turkish earn-out drafting is replacing measurable operational covenants with vague moral language. Phrases such as “the buyer shall use best efforts” or “the buyer shall not frustrate the earn-out” may sound useful, but they are often too abstract to resolve a serious dispute over customer migration, margin compression, or internal cost allocation. Under Turkish law, broad contractual freedom allows far more specific drafting. The better approach is to define exact prohibitions and exact obligations: for example, limits on related-party charges, rules on intercompany service allocations, prohibitions on transferring key contracts away from the earn-out perimeter without seller consent, minimum reporting packages, and objective procedures for approving extraordinary spending during the earn-out period.
This is also where Turkish law on general terms and conditions becomes relevant. Article 20 defines general terms as pre-drafted clauses prepared unilaterally for repeated use, and the following provisions state that clauses contrary to the counterparty’s interests may be treated as unwritten if not properly brought to that party’s attention, while ambiguous standard terms are interpreted against the drafter. In a heavily buyer-drafted earn-out, especially one inserted into a template SPA, overly one-sided operational discretion clauses may become vulnerable to this framework if they were not genuinely negotiated. For that reason, earn-out provisions should be demonstrably negotiated and commercially balanced, not buried as standard boilerplate.
Milestone earn-outs versus financial earn-outs
Not every Turkish earn-out needs to be linked to financial performance. In some sectors, milestone-based earn-outs are more defensible and easier to audit. For example, a healthcare, licensing, energy, biotech, or regulated-product transaction may tie contingent price to the grant of a permit, the completion of a clinical or technical milestone, the signing of a major customer contract, or the launch of a product. Legally, milestone earn-outs can reduce some accounting disputes because the trigger is external and binary. But they create a different drafting challenge: the agreement must define exactly what counts as achievement, who controls the application or process, and what happens if the milestone is delayed by a regulator, a force majeure event, or a strategic decision by the buyer after closing. Turkish law will enforce what the parties define, but it will not save a milestone clause from vagueness simply because the underlying event sounds objective.
Financial earn-outs remain more common because they map directly to valuation models. Yet they also create more room for buyer influence. That is why, in Turkish transactions, milestone earn-outs are often preferable where the business can be valued by reference to a specific regulatory, commercial, or product event rather than a multi-variable profit metric. When financial earn-outs are used, the drafting burden becomes significantly higher.
Set-off, escrow, and security for payment
Another core issue is payment security. The seller’s biggest fear is often not only that the earn-out will be measured unfairly, but that even a valid claim will be difficult to collect. Turkish law permits parties to structure payment obligations flexibly, which means the agreement can include escrow arrangements, deferred bank guarantees, holdbacks, or set-off limitations. The legal need for such protection becomes stronger because Article 112 frames breach primarily as a damages claim unless the contract gives the parties more specific payment mechanics. In practice, a seller should prefer a payment structure that reduces the need to litigate or arbitrate just to secure money already earned under the formula.
If the parties use escrow or holdback arrangements, the earn-out clause should also state whether the buyer may set off indemnity claims against contingent payments. This is one of the most common sources of post-closing tension. Buyers often want broad set-off rights; sellers often argue that earn-out is part of the price and should not be frozen by disputed indemnity allegations. Turkish law does not solve this automatically. The answer depends on the contract. That makes the set-off and payment-security architecture just as important as the earn-out formula itself.
Penalty clauses and reporting breaches
Turkish law expressly recognizes penalty clauses. Articles 179 and 180 provide that if a penalty is agreed for non-performance or improper performance, the creditor may generally demand either performance or the penalty, and the agreed penalty may be payable even if no actual damage occurred. Article 182 adds that the parties are free to determine the amount of the penalty, but the judge may reduce an excessive penalty ex officio. These provisions make penalty clauses particularly useful in earn-out structures for obligations that are not easy to value in damages terms, such as failure to deliver statements on time, refusal to provide access to records, breach of agreed reporting covenants, or failure to cooperate with an agreed expert determination process.
That does not mean every earn-out should be backed by a heavy penalty. Excessive penalties are vulnerable to judicial reduction, and overly aggressive sanctions may simply create a second layer of dispute. Still, Turkish law gives parties a real tool for strengthening ancillary obligations around the earn-out. Used carefully, a penalty clause can improve compliance with process obligations even where the main contingent price dispute remains unresolved.
Limitation periods and survival periods
Earn-out disputes also require careful attention to time limits. Article 146 of the Turkish Code of Obligations sets a general ten-year limitation period unless the law provides otherwise. By contrast, Article 231 states that claims arising from seller liability for defects are generally time-barred after two years from delivery unless the seller assumed a longer period, and a seller that transferred the item defectively with gross fault cannot benefit from that shorter period. In an M&A context, an earn-out claim is usually better characterized as an ordinary contractual price claim rather than a classic sale-defect claim, but the parties should not leave that classification to later argument. They should specify notice deadlines, calculation objection periods, expert referral timing, and payment dates with precision.
This is especially important because earn-out disputes often arise in phases. First comes delivery of the buyer’s calculation. Then comes the seller’s objection. Then often an expert or accountant review. Only after that does a monetary dispute become ripe. A Turkish agreement that says only “the seller may object within a reasonable time” is inviting a later fight about whether the objection was late or incomplete. Clear contractual micro-deadlines are one of the cheapest ways to prevent a long and expensive post-closing dispute.
Arbitration is often the best forum for cross-border earn-out disputes
For cross-border transactions, arbitration is often the most suitable forum for earn-out disputes. Turkey’s International Arbitration Law applies where the dispute has a foreign element and the seat of arbitration is in Turkey, or where the parties choose the law to apply. The law also states that it does not apply to disputes relating to rights in rem over immovables in Turkey or disputes not subject to party disposition. That framework is well suited to earn-out conflicts, which are typically contractual, valuation-heavy, multilingual, and commercially sensitive.
The same law gives parties significant procedural autonomy. Article 8 provides that parties may freely determine the procedural rules to be applied by the arbitrator or tribunal, subject to mandatory provisions, or may do so by reference to institutional or other arbitration rules. It also confirms equality of the parties and the right to present claims and defenses. For Turkish acquisition agreements, this is highly useful because earn-out disputes often need bespoke procedural design: document production around management accounts, accountant-style expert input, confidentiality, English-language proceedings, and expedited timetables. Arbitration allows parties to build a forum that fits those needs better than ordinary court litigation often does.
Tax and stamp duty should not be ignored
Earn-out clauses are not only litigation risks; they are also documentation and tax risks. Türkiye’s official tax guide states that VAT generally applies at 1%, 10%, and 20% and that stamp duty applies to a wide range of documents, including contracts, at rates ranging from 0.189% to 0.948%. For deferred-price structures, this means parties should not assume that amendments, side letters, or contingent payment instruments are economically neutral from a document-tax perspective. The exact tax treatment of a particular earn-out structure may depend on the transaction design, but the broad official rule is clear enough: contract-heavy pricing mechanisms should be reviewed with Turkish tax consequences in mind.
This matters in practice because earn-outs sometimes evolve after signing. The parties may amend the formula, extend the earn-out period, settle a dispute by side agreement, or convert contingent consideration into a fixed payment. In Turkish transactions, every such step should be reviewed not only for corporate and contractual enforceability, but also for document-tax implications. A seemingly simple settlement of an earn-out argument can itself create new tax friction if documented carelessly.
The drafting mistakes that create most Turkish earn-out disputes
The most common Turkish earn-out mistakes are usually the simplest ones. The first is using undefined financial language. The second is failing to state which accounting principles prevail if local law, past practice, and buyer group policies conflict. The third is omitting seller access rights and audit mechanics. The fourth is letting the buyer retain complete operational discretion without any anti-manipulation covenant. The fifth is failing to address set-off, payment security, and dispute escalation. And the sixth is inserting a sophisticated contingent-price clause into a template agreement without checking Turkish rules on contract interpretation, standard terms, penalty clauses, limitation, and gross-fault carve-outs. None of these mistakes is exotic. All are avoidable with disciplined drafting.
Conclusion
Earn-out mechanisms in Turkish acquisition agreements are legally workable, commercially valuable, and often the best solution when buyer and seller disagree on value. Turkish law does not contain a special statutory earn-out regime, but its combination of contract freedom, true-intent interpretation, acceptance of determinable price concepts, and enforceable penalty and arbitration frameworks makes earn-outs fully usable when drafted properly. At the same time, Turkish law imposes meaningful discipline through rules on mandatory law, general terms, gross-fault liability, and limitation periods.
The practical lesson is simple. In a Turkish deal, an earn-out should never be treated as a loose commercial compromise to be “worked out later.” It should be treated as a self-contained contractual system with a clear formula, a clear accounting framework, clear information rights, clear anti-manipulation rules, clear payment mechanics, clear time limits, and a clear dispute forum. When parties do that, the earn-out can bridge valuation gaps and help close otherwise difficult transactions. When they do not, the earn-out usually becomes the first major dispute of the post-closing period.
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