Learn how termination of contracts works under Turkish law, including rescission, notice-based termination, immediate termination for just cause, impossibility, hardship, lease and employment rules, and the legal consequences of ending a contract in Turkey.
Introduction
Termination of contracts in Turkey is not governed by a single universal rule. Turkish law distinguishes between contracts that end because their agreed term expires, contracts that end by mutual agreement, contracts that are rescinded because of default, contracts that are terminated prospectively because they involve continuous performance, and contracts that end because performance became impossible or excessively burdensome. The main statutory framework is found in the Turkish Code of Obligations No. 6098, especially its general provisions on contract formation, freedom of contract, debtor default, impossibility, and hardship, together with the special rules for individual contract types such as service contracts and leases.
This matters in practice because “termination” in Turkish law does not always mean the same thing. In some cases, the contract is treated as unwound with restitution of performances. In others, the contract ends only for the future. In still others, the contractual relationship continues unless a valid notice period is observed or a statutory ground exists. The real legal question is therefore not whether a party wants out of the contract, but which legal route applies to that particular contract and breach scenario.
For that reason, anyone dealing with termination of contracts in Turkey should begin with classification. Is the contract an instantaneous reciprocal contract such as a sale? Is it a continuing-performance contract such as a lease, service contract, agency agreement, or long-term supply relationship? Did the other party fall into default, did performance become impossible, or did the economic balance collapse because of extraordinary hardship? Each answer leads to a different statutory path.
This article explains the subject in practical English. It focuses on the main grounds for termination, the most important notice requirements, and the legal consequences that follow when a contract is ended under Turkish law.
1. Contract Termination Starts With Contract Structure
The starting point is contract formation and contractual freedom. Under Articles 1 and 2 of the Turkish Code of Obligations, a contract is formed by corresponding declarations of intent, and if the parties agree on the essential points the contract is considered concluded even if secondary points remain unresolved. Article 26 allows the parties to determine contractual content freely within legal limits, while Article 27 invalidates contracts contrary to mandatory law, morality, public order, personal rights, or impossible subject matter.
These rules matter for termination because they explain two important things. First, parties may contractually regulate termination mechanisms, including notice periods, cure periods, material-breach definitions, and exit rights, so long as they remain within legal limits. Second, not every contractual end is a “termination” in the same legal sense. Some agreements end because the term expires, some by mutual release, some by rescission after breach, and some by special statutory grounds that apply to specific contract types.
A practical drafting lesson follows immediately: a Turkish-law contract should not simply say “either party may terminate for breach” and stop there. It should identify whether the contract is meant to end retroactively or prospectively, whether an additional period must be given, and whether special statutory rules for that contract type override the general clause. Otherwise, the parties may discover only during litigation that Turkish law treated their chosen wording differently from what they expected.
2. Mutual Termination by Agreement
Because Article 26 protects freedom of contract, Turkish law generally allows parties to end a contract by mutual agreement, unless a mandatory rule or a special form requirement prevents that result. In practical terms, this is the cleanest path where both sides want to unwind or close the relationship without litigating breach or cause.
But mutual termination still requires care. If the original contract was subject to a legally required form, the safest practice is to ensure the termination or release arrangement matches that formal discipline or at least does not undermine it. Turkish law is generally flexible on release, but form-sensitive transactions and sector-specific rules can create risk if parties try to end a formally regulated relationship through casual or ambiguous documents.
In commercial practice, mutual termination agreements should also state what happens to already-accrued obligations, partial performances, payments already made, confidentiality, penalties, securities, and dispute releases. Turkish law will not invent perfect close-out mechanics for the parties if the document stays silent.
3. Rescission for Default in Reciprocal Contracts
One of the main statutory termination routes is debtor default in reciprocal contracts. Under Article 123 of the Turkish Code of Obligations, where reciprocal obligations are due and one party falls into default, the other party may grant an appropriate additional period for performance or ask the court to grant one. Article 124 then lists cases where granting such an additional period is unnecessary, including where it is obvious the additional period would be ineffective, where delay made performance useless for the creditor, or where the contract shows that late performance will not be accepted after a fixed time or period.
Article 125 then sets out the creditor’s elective remedies once the debtor fails to perform within the additional period, or where no additional period was required. The creditor may still demand performance together with delay damages. Or the creditor may immediately declare that it waives performance and demand compensation for non-performance. Or it may rescind the contract. In the event of rescission, the parties are released from their reciprocal duty to perform and may reclaim what they have already rendered; if the debtor cannot prove absence of fault in falling into default, the creditor may also claim the loss suffered because the contract became ineffective.
This is one of the most important general termination mechanisms in Turkish law. It is especially relevant for sale contracts, one-off delivery contracts, turnkey obligations, and other reciprocal relationships where the breach concerns a discrete performance rather than a long-term ongoing relationship. A party terminating on this basis should be careful to comply with the statutory sequence: maturity, default, additional period unless excused, then election of remedy.
4. Termination in Continuous-Performance Contracts
Turkish law draws a crucial distinction for continuous-performance contracts. Article 126 states that in contracts involving continuous performance, where performance has already started and the debtor falls into default, the creditor may seek performance and delay damages, but may also terminate the contract and demand compensation for the loss caused by the contract ending before its expected term.
This matters because Turkish law does not treat continuing relationships exactly like ordinary one-shot exchanges. In a continuing contract such as a lease, service contract, or agency relationship, it often makes more legal and commercial sense to end the relationship for the future rather than trying to unwind the entire past. Article 126 reflects that logic.
The practical lesson is that parties should not use “rescission” and “termination” interchangeably in Turkish-law drafting. For continuing-performance contracts, a prospective termination model is usually more consistent with the Code than a full retroactive unwinding model.
5. Impossibility as a Ground for Ending the Contract
Another major route is impossibility of performance. Under Article 136, if performance becomes impossible for reasons for which the debtor cannot be held responsible, the obligation ends. In reciprocal contracts, the party released from performance must return what it received under unjust-enrichment principles and loses the right to demand the counter-performance not yet rendered, unless the law or contract placed the pre-performance risk on the creditor. The debtor must also notify the creditor without delay and take necessary steps to prevent the increase of loss, otherwise it becomes liable for the additional damage caused by its omission.
This rule is central to termination analysis because impossibility is not the same as default. If performance truly became impossible without attributable fault, Turkish law does not usually frame the result as a punitive breach-based rescission. It treats the obligation as having ended by operation of law.
For drafting and litigation, the key distinction is between real impossibility and mere inconvenience. Turkish law does not end a contract simply because performance became harder, more expensive, or commercially unattractive. The impossibility must be serious enough that performance can no longer be rendered in the legal sense contemplated by Article 136.
6. Partial Impossibility
Article 137 deals with partial impossibility. If performance becomes only partly impossible for reasons not attributable to the debtor, the debtor is released only from the impossible part. But if it is clear that the parties would not have concluded the contract had they foreseen that partial impossibility, the entire obligation ends. In reciprocal contracts, if the creditor accepts partial performance, the counter-performance is reduced proportionally; if the creditor does not accept partial performance or if the counter-performance is indivisible, the rules of total impossibility apply.
This provision is particularly important in supply contracts, staged-delivery arrangements, construction packages, and other business relationships where one part of performance may fail while the rest remains possible. It means Turkish law can scale the termination consequence to the actual disruption rather than forcing an all-or-nothing answer in every case.
7. Excessive Hardship and Judicial Adaptation
Article 138 regulates what Turkish law calls aşırı ifa güçlüğü, usually translated as excessive hardship. It applies where an extraordinary event that was not foreseen and could not reasonably have been foreseen at the time of contracting arises from a cause not attributable to the debtor and changes the circumstances so dramatically that demanding performance would be contrary to the rules of honesty. The debtor must also either not yet have performed or must have performed while reserving its rights. In that case, the debtor may ask the judge to adapt the contract to the new conditions, and if adaptation is not possible, may rescind; in continuous-performance contracts, termination is generally used instead of rescission. The article also applies to foreign-currency debts.
This is an essential part of Turkish termination law because not every extraordinary event makes performance impossible. Some events leave performance technically possible but destroy the economic basis of the bargain. Turkish law does not automatically end the contract in that situation. It usually prefers adaptation first, with rescission or termination as the fallback if adaptation is not possible.
In practice, Article 138 is especially relevant to long-term supply agreements, leases, construction contracts, foreign-currency payment structures, and other continuing arrangements exposed to severe inflation, exchange-rate shock, regulatory change, or market disruption.
8. Legal Consequences After Termination
The legal consequences of ending a contract depend on the route used. In rescission after reciprocal default under Article 125, the parties are released from future performance and may reclaim performances already rendered; the creditor may also seek the loss caused by the contract’s ineffectiveness if the debtor cannot prove absence of fault. In continuous-performance contracts under Article 126, termination generally works prospectively, and the creditor may seek the damage caused by the premature ending of the relationship. Under impossibility, the Code directs the parties toward unjust-enrichment restoration and risk allocation rather than ordinary default damages. Under hardship, the law prefers adaptation first and only then rescission or termination.
Accessory rights must also be considered. Article 131 states that when the principal obligation ends through performance or another cause, accessory rights and obligations such as pledge, suretyship, interest, and penalty clauses also end. But the right to request accrued interest and a penalty may survive if reserved by contract, by notice up to the time of performance, or if the circumstances show such reservation.
This means a termination clause should not focus only on the end date. It should also state what happens to securities, penalties, accrued claims, confidentiality obligations, intellectual-property arrangements, transition duties, and already-issued invoices. Under Turkish law, post-termination silence often creates avoidable disputes.
9. Notice Requirements Matter
Turkish contract termination law is highly sensitive to notice. Articles 123 to 125 require an additional period in many default cases unless one of the statutory exceptions in Article 124 applies. Article 136 requires the debtor to notify the creditor without delay when performance becomes impossible. Article 138 effectively requires the debtor relying on hardship to act consistently and, if it has performed, to reserve its rights.
In special contract types, notice becomes even more structured. That is why a Turkish-law contract should not leave termination notice to general assumptions. It should say how notice is given, when it is effective, how much cure time exists, and whether email, registered letter, notary notice, or other durable method is required or preferred. Turkish law supplies defaults, but clear contract drafting reduces later procedural fights.
10. Service Contracts: A Special Termination Regime
The Turkish Code of Obligations contains a detailed special regime for service contracts. Article 430 states that a fixed-term service contract ends automatically at the expiry of the term unless otherwise agreed, and if it continues tacitly after expiry it converts into an indefinite-term contract. It also allows either party to terminate a service contract lasting more than ten years after the tenth year by observing a six-month notice period.
For indefinite-term service contracts, Article 431 gives each party the right to terminate by observing notice periods. Article 432 then sets those periods: two weeks if service lasted up to one year, four weeks if it lasted from one to five years, and six weeks if it lasted more than five years. These periods cannot be shortened, though they can be increased by contract, and if the parties wrote different notice periods, the longer one applies to both.
Article 433 also allows a probation period of up to two months, during which either side may terminate without notice and without compensation, while the employee’s accrued wage and other rights for days worked remain preserved. Article 434 provides special protection against abusive use of the termination right by requiring the employer to pay compensation equal to three times the wage corresponding to the notice period where the right was abused.
Immediate termination is governed by Article 435. Either party may terminate immediately for just cause, and the terminating party must state the reason in writing. Turkish law defines just cause broadly as all circumstances in which, according to the rules of honesty, continuation of the service relationship can no longer reasonably be expected from the terminating party. Article 437 governs the financial consequences of justified immediate termination, while Article 438 protects the employee where the employer immediately terminates without just cause.
These rules show that service-contract termination in Turkey is highly structured and cannot safely be handled through generic “either party may terminate at any time” wording alone.
11. Lease Agreements: Notice, Default, and Eviction
Lease termination also follows a special regime. Article 315 states that if the tenant does not pay due rent or ancillary expenses after delivery of the leased property, the landlord may grant a written period and warn that the lease will be terminated if payment still is not made. The minimum cure period is ten days in ordinary leases and thirty days in residential and roofed workplace leases.
Article 331 then allows either party to terminate the lease at any time, while observing the statutory notice period, if important reasons make continuation of the relationship intolerable. The judge determines the financial consequences of that extraordinary termination according to the circumstances.
Residential and roofed workplace leases are subject to special protection. Article 347 provides that in fixed-term residential and roofed workplace leases, if the tenant does not give notice at least fifteen days before expiry, the lease is deemed extended for one year on the same conditions. The landlord cannot terminate merely by relying on expiry of the term, though after the ten-year extension period the landlord may terminate without cause by written notice given at least three months before the end of each extension year. Article 348 requires written form for the validity of termination notice in these leases.
These rules make Turkish lease termination highly statutory, especially in tenant-protective lease categories. A landlord cannot safely rely on generic termination language if the Code gives the tenant stronger protections.
12. Agency Agreements: Ongoing Commercial Relationships
Agency contracts also have their own termination regime. Article 121 of the Turkish Commercial Code states that an agency agreement made for an indefinite period may be terminated by either party on three months’ notice. Even if the contract was made for a fixed term, it may be terminated at any time for just cause. If a fixed-term agency continues after expiry, it becomes indefinite-term. A party that terminates without just cause or without respecting the three-month notice period must compensate the other party for the loss caused by unfinished business.
This is an important example of how Turkish law handles continuing commercial contracts. The logic is similar to other long-term relationships: ordinary exit by notice where the relationship is indefinite, but immediate exit for justified reason where continuation became unacceptable.
13. Good Faith Still Controls Termination
Throughout all of these rules, good faith remains central. Article 2 of the Turkish Civil Code requires everyone to act according to the rules of honesty while exercising rights and performing obligations, and it denies legal protection to manifest abuse of rights. That means even where a party has a contractual or statutory termination right, Turkish law still examines whether the right is being exercised honestly and consistently with its proper purpose.
This matters especially in hardship cases, urgent terminations for alleged just cause, notice timing disputes, and attempts to use expiry or technical breach as a pretext for commercially opportunistic exit. Turkish courts do not ignore the text, but the text is always read within the broader framework of honest dealing.
14. Procedural Point: Mediation Before Litigation
Termination disputes often lead to damages, receivables, restitution, or compensation claims. In many categories of Turkish contract litigation, mandatory mediation now comes first. Article 5/A of the Turkish Commercial Code makes mediation a condition of action for many commercial claims involving money, compensation, annulment of objection, negative declaration, and restitution. Article 18/A of the Mediation Law states that if mediation is required, the claimant must attach the final non-settlement report to the statement of claim, and if mediation was skipped entirely the case is dismissed procedurally. Article 18/B adds that, with a limited exception for non-judgment execution eviction, lease disputes also require mediation before suit.
This procedural layer is extremely important. A party may have a strong termination case on the merits and still lose time, and sometimes limitation safety, by filing in court without first satisfying the mediation requirement where the statute makes mediation mandatory.
Conclusion
Termination of contracts in Turkey is governed by a structured and differentiated legal system. Under the Turkish Code of Obligations, contracts may end by mutual agreement, expiry of term, rescission after default, prospective termination in continuing-performance relationships, impossibility, partial impossibility, or hardship-based adaptation followed by rescission or termination. Special contract types such as service contracts, leases, and agency agreements have their own rules on notice periods, just cause, and financial consequences.
The practical takeaway is simple. In Turkey, termination is never just a one-line clause saying “this agreement may be terminated.” A well-structured Turkish-law contract should say which ground applies, whether notice and cure are required, whether the consequence is rescission or prospective termination, what happens to accrued obligations and securities, and whether any special statutory regime overrides the general rule. That is what turns a commercial exit clause into a legally workable termination mechanism under Turkish law.
FAQ
What is the difference between rescission and termination under Turkish law?
In Turkish practice, rescission is commonly associated with reciprocal contracts and can unwind the relationship with restitution effects under Article 125, while termination is the more natural model for continuous-performance contracts and generally works prospectively under Article 126 and in special contract regimes.
Can a contract be terminated immediately in Turkey?
Yes, but usually only where the law or contract allows it. Article 124 lists cases where no additional cure period is required in default situations, Article 435 allows immediate termination of service contracts for just cause, and special contract types such as leases and agency agreements also recognize extraordinary or justified termination in specific circumstances.
Is notice always required before termination?
No, but notice is very often central. Default-based rescission generally requires an additional period unless Article 124 excuses it; indefinite-term service contracts require notice periods under Article 432; residential and roofed workplace lease termination notices must be in writing under Article 348; and agency contracts usually require three months’ notice if indefinite.
What happens if performance becomes impossible?
If performance becomes impossible for reasons not attributable to the debtor, Article 136 states that the obligation ends. In reciprocal contracts, already-received performance must generally be returned under unjust-enrichment rules, and the debtor loses the right to claim the unperformed counter-performance.
Can a contract be ended because it became too burdensome to perform?
Yes, potentially. Article 138 allows the debtor to ask for judicial adaptation where an extraordinary unforeseen event radically changes the contractual equilibrium; if adaptation is not possible, rescission or, in continuous contracts, termination may follow.
Do lease disputes and commercial termination disputes require mediation first?
Often yes. Many commercial monetary and compensation claims require mediation first under Article 5/A of the Turkish Commercial Code, and most lease disputes require mediation first under Article 18/B of the Mediation Law, with limited statutory exceptions.
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