By Av. Serkan Kara, Istanbul Bar No. 53770. Last updated: 14 June 2026.
A contract under Turkish law is formed by the mutual and matching declarations of will of the parties under the Turkish Code of Obligations No. 6098, and a defensible contract is one whose essential elements, applicable form, and dispute-resolution mechanism are settled at drafting rather than litigated later. For cross-border companies and foreign investors, the highest-value drafting decisions are the governing-law clause under Private International Law Act No. 5718 and the choice between national courts and arbitration enforceable under the New York Convention.
What are the essential elements of a valid contract under Turkish law?
Under the Turkish Code of Obligations No. 6098, a contract arises from the mutual and congruent declarations of will of the parties, so a sound agreement must fix the parties, the subject matter, the rights and obligations, the duration and exit terms, and the consequences of breach. Turkish law applies freedom of contract, meaning the parties may shape terms freely except where a mandatory rule overrides them. Clauses that contradict a mandatory provision are void by operation of law, so the drafting task is to allocate risk inside those limits.
A well-structured commercial contract should address each of the following:
- Type of the contract (for example work, construction, agency, distribution, or service)
- Identification and notification addresses of the parties
- Purpose and subject matter of the agreement
- Definitions of the operative terms
- Rights and obligations of each party
- Duration, renewal, and termination conditions
- Force majeure provisions under Article 136 of Code No. 6098
- Penalty clause and liquidated damages under Articles 179 to 182 of Code No. 6098
- Security or deposit arrangements
- Governing law, jurisdiction, or arbitration clause
- Attachments such as technical documents and trade registry excerpts
| Clause | Legal basis | Purpose | Risk if omitted |
|---|---|---|---|
| Governing law | Private International Law Act No. 5718, Art. 24 | Fixes which country’s law governs the contract | Uncertainty and forum disputes in cross-border matters |
| Dispute resolution | Civil Procedure Code No. 6100 / International Arbitration Law No. 4686 | Selects courts or arbitration as the forum | Default to local courts; harder enforcement abroad |
| Force majeure | Code of Obligations No. 6098, Art. 136 | Excuses performance during extraordinary events | Liability can persist despite unforeseeable events |
| Penalty clause | Code of Obligations No. 6098, Art. 179 to 182 | Pre-agreed consequence for breach | Court may reduce an amount it finds excessive |
| Termination | Code of Obligations No. 6098, Art. 117 to 126 | Defines exit conditions and notice | Ambiguity over how the relationship ends |
What form requirements must a contract meet to be valid?
Most commercial contracts under Turkish law follow the freedom-of-form principle in Article 12 of the Code of Obligations No. 6098, so they are valid even when concluded orally. The exceptions matter: where a statute prescribes a specific form, a contract that ignores that form is void. A real estate sale requires an official form executed at the Land Registry under Article 237, a suretyship requires written form with the guaranteed amount in the guarantor’s handwriting under Article 583, and an employment contract of one year or more must be in writing under Article 8 of Labour Law No. 4857.
Form also drives proof. Even where an oral contract is valid, a dispute above the monetary threshold in Article 200 of the Civil Procedure Code No. 6100 cannot be proven by witness testimony alone and needs written evidence. That threshold is set by law and revised periodically, so confirm the figure in force at the time of the dispute rather than relying on a fixed number.
| Contract type | Form requirement | Legal basis | Consequence of non-compliance |
|---|---|---|---|
| Real estate sale | Official form at the Land Registry | Code No. 6098, Art. 237 | Absolutely void |
| Suretyship (guarantee) | Written, with handwritten amount | Code No. 6098, Art. 583 | Void |
| Employment contract of one year or more | Written form | Labour Law No. 4857, Art. 8 | Indefinite-term presumption applies |
| General commercial contract | No mandatory form | Code No. 6098, Art. 12 | Oral contract remains valid |
| Higher-value contracts | Written evidence for proof | Civil Procedure Code No. 6100, Art. 200 | Cannot be proven by witnesses alone |
Beyond statutory form, sound execution practice protects the document itself. Confirm that the signatories are legally competent and properly authorised, attach identification documents and signature circulars, and have company representatives sign together with the corporate seal. Each page should be initialled, the final page signed by all parties, and the number of pages and counterparts stated in the text. For a tailored execution checklist, our commercial contract lawyer guidance for Turkey sets out the practical steps in more detail.
How should the dispute resolution clause be drafted in an international contract?
In a cross-border contract the dispute resolution clause is the single provision that decides whether a favourable outcome can actually be enforced, so it should name the forum, the seat, the language, and the governing law explicitly. International arbitration is usually preferred because an award is enforceable across the member states of the New York Convention with only narrow grounds for refusal under Article V, whereas a national court judgment depends on bilateral treaties or local recognition procedures. Turkish-seated arbitration is governed by the International Arbitration Law No. 4686, and the governing-law choice itself rests on Article 24 of the Private International Law Act No. 5718.
The choice of arbitral institution shapes cost, speed, and procedure. The two most common choices for contracts connected to Turkey are the International Chamber of Commerce (ICC) and the Istanbul Arbitration Centre (ISTAC).
| Factor | ICC (International Chamber of Commerce) | ISTAC (Istanbul Arbitration Centre) |
|---|---|---|
| Profile | Global institution with broad cross-border recognition | Turkey-based institution designed for regional and cross-border disputes |
| Award scrutiny | Scrutiny of the draft award by the ICC Court before issue | Streamlined administration, including a fast-track option |
| Typical fit | High-value or multi-jurisdiction contracts seeking maximum recognition | Cost-sensitive and Turkey-centred commercial disputes |
| Enforcement | Award enforceable under the New York Convention | Award enforceable under the New York Convention |
Mediation can resolve disputes more cheaply and preserve a commercial relationship, but it binds the parties only once a settlement is reached, so it works best as a first tier before arbitration rather than as a substitute. Whatever the forum, pairing a clear governing-law clause under Article 24 of Act No. 5718 with the dispute-resolution clause removes the largest single source of cross-border uncertainty.
What happens if a contract clause violates a mandatory rule?
A clause that contradicts a mandatory provision of Turkish law is void and unenforceable regardless of what the parties agreed, under the absolute-nullity principle of the Code of Obligations No. 6098. Absolute nullity applies automatically, can be raised by any party or by the court of its own motion at any stage, and is not cured by the passage of time. In practice this means the freedom to draft is real but bounded, and a clause drafted around a mandatory rule rather than against it is the safer design.
The penalty clause is the clearest illustration. Under Articles 179 to 182 of Code No. 6098 the parties may agree a fixed sum payable on breach, and unlike a common-law liquidated-damages clause it does not have to mirror the actual loss. The limit is judicial: a court retains the power to reduce a penalty it finds excessive or disproportionate to the harm suffered, so an unreasonably large figure invites reduction rather than guaranteeing recovery.
Stamp duty on contracts
Many written contracts in Turkey attract stamp duty under the Stamp Duty Law, and the drafting team should account for it rather than discover it later. The applicable rate and the reporting and payment deadlines are set by the Stamp Duty Law and its annexes and are revised periodically, so confirm the rate and the deadlines in force at the time of execution rather than relying on a figure quoted in any article. The recurring practical points are these:
- All signatories are jointly responsible for the duty.
- Where a contract is executed in more than one original copy, each copy is assessed separately.
- Where a single contract contains several transactions arising from different causes, the duty is levied on the transaction carrying the highest charge.
- Reporting and payment follow statutory deadlines that differ for permanent and non-permanent taxpayers; confirm the current deadlines before filing.
How do international contracts differ from domestic agreements?
An international contract differs from a purely domestic one because it must reconcile more than one legal system, so it has to settle questions a single-jurisdiction agreement can leave implied: which law governs, which forum decides, which language prevails, and how an outcome is enforced abroad. The governing-law clause under Article 24 of the Private International Law Act No. 5718 is decisive, because the chosen law determines the validity of specific clauses, the remedies available for breach, the limitation periods, and the rules of interpretation. Parties should choose a law with a developed body of commercial precedent and predictable judicial reasoning.
Two further provisions deserve dedicated attention in cross-border drafting. Where the contract exists in more than one language, the parties must name a single prevailing version to resolve inconsistencies. Currency and payment provisions must address exchange-rate risk, payment timing, and compliance with applicable sanctions and anti-money-laundering rules. Enforcement then turns on the dispute-resolution choice: an arbitral award travels under the New York Convention across its member states, while a court judgment depends on the recognition regime of each country where enforcement is sought, which is why arbitration is the default mechanism for cross-border commercial contracts. Our overview of cross-border consumer and refund obligations in Turkey shows how these enforcement questions also reach business-to-consumer terms.
What are the risks of a poorly drafted contract?
A poorly drafted contract converts ordinary commercial risk into legal exposure, and the failure usually traces back to one of a small number of recurring drafting gaps. The most damaging are these:
- Ambiguous terms that invite competing interpretations and turn a routine performance question into litigation.
- Missing essential clauses such as force majeure, termination, or dispute resolution, which forces a court to fill the gap with default rules the parties never chose.
- Non-compliance with form in the statutory cases, which can void the entire contract under the relevant provision of Code No. 6098 and leave a party without recourse.
- Inadequate liability provisions, where the absence of a limitation-of-liability or indemnity clause exposes a party to open-ended damages.
- Weak cross-border enforcement design, where a missing governing-law or arbitration clause makes a favourable outcome difficult to enforce outside the home jurisdiction.
Defective-goods and warranty exposure is a frequent example of the third and fourth risks combining, and our note on defective goods and warranty claims in Turkey shows how a clear liability clause changes the outcome.
How are electronic and digital contracts handled?
Electronic contracts are legally recognised in Turkey under the Electronic Signature Law No. 5070 and the Electronic Commerce Law No. 6563, so a digital agreement can be as binding as a paper one when it is executed correctly. The drafting requirements are specific: use a qualified electronic signature for any contract that requires written form, build in a valid electronic-consent mechanism, comply with distance-selling rules for consumer contracts, apply data-protection measures consistent with the Personal Data Protection Law No. 6698, and retain audit trails for regulatory compliance. Standard terms must be made available to the other party before the contract is formed, otherwise they may not bind.
Frequently asked questions about contract drafting
Is a verbal agreement legally binding in Turkey?
Yes. Under the freedom-of-form principle in Article 12 of the Code of Obligations No. 6098, most commercial contracts are valid even when made orally. The exceptions are the statutorily prescribed cases, such as real estate sales, suretyship, and longer-term employment contracts, which require specific written or official form. Even where an oral contract is valid, a written instrument is strongly advisable, because a dispute above the threshold in Article 200 of the Civil Procedure Code No. 6100 cannot be proven by witness testimony alone.
What is the difference between a penalty clause and ordinary damages?
A penalty clause under Articles 179 to 182 of the Code of Obligations No. 6098 fixes a sum payable on breach in advance, and it is owed without proof of the actual loss, which is its main advantage over ordinary damages. Ordinary damages must be proven and quantified. The trade-off is judicial control: a court may reduce a penalty it considers excessive, so the figure should be commercially defensible rather than punitive.
How should force majeure be defined in an international contract?
Article 136 of the Code of Obligations No. 6098 gives a general framework for impossibility of performance, but an international contract should define force majeure expressly. Good practice lists the qualifying events, such as natural disasters, pandemics, war, government action, and sanctions; sets notification duties and timelines; specifies whether the effect is suspension or termination; and fixes a maximum suspension period after which either party may exit. The ICC Force Majeure Clause 2020 is a widely accepted model for cross-border drafting.
How is a contract enforced across borders?
Enforcement depends on the dispute-resolution clause. An arbitral award benefits from the New York Convention, which allows recognition across its member states with only the narrow refusal grounds in Article V. A court judgment is harder to enforce abroad and depends on bilateral treaties or each country’s recognition procedure. For this reason a well-drafted arbitration clause, naming the institution and seat, is the most reliable route to international enforceability.
Which law should govern a cross-border contract connected to Turkey?
The parties may choose the governing law under Article 24 of the Private International Law Act No. 5718, and the choice should fall on a legal system with developed commercial precedent and predictable interpretation. The governing law decides the validity of clauses, the remedies for breach, the limitation periods, and the rules of construction, so it is selected deliberately rather than left to default. The clause should be paired with a matching dispute-resolution clause so that the chosen law and the chosen forum work together.
Speak to a cross-border contract lawyer
Whether you are negotiating a distribution agreement, structuring a joint venture, or stress-testing an existing portfolio, the value is in the clauses that decide governing law, form, and enforcement before a dispute arises. Serka Law Firm drafts, reviews, and negotiates domestic and international commercial agreements for foreign investors and cross-border companies, with arbitration and litigation clauses built for enforceability. To structure or review your agreements, work with our corporate and commercial law team, or for a forum-selection strategy speak to our international arbitration practice.
General information, not legal advice. Turkish law; verify your specific situation with qualified counsel.
Related legal guides
- For related guidance, see our Turkce: Ticari Sozlesme Hazirlama Rehberi.