Arbitration in Turkey for Foreign Investors: Which Law Applies, What Can Be Arbitrated, How Arbitrators and Courts Divide the Work, What ISTAC Offers, How an Award Is Attacked and Made Enforceable, and How a Foreign Award Is Enforced Under the New York Convention

Most of the arbitration clauses I am asked to review were written for a different country: a seat in London or Geneva, a Turkish counterparty that signs, and nobody asking what happens when the award must be enforced against assets in Istanbul, or when the Turkish party sues in a Turkish court regardless of the clause. The other half of my files run the opposite way: a Turkish seat was accepted without knowing that Turkey has two arbitration statutes, that the foreign element decides which applies, and that a party domiciled abroad can waive the right to attack the award in advance. This page sets out the framework as the statutes state it: the International Arbitration Law of 2001 and the domestic chapter of the Code of Civil Procedure, the limits on arbitrability, the court's role, the Istanbul Arbitration Centre's rules, the set-aside action, the certificate that makes a Turkish award enforceable, and the enforcement of foreign awards under the New York Convention and the Private International Law Code.

Sources, checked 9 September 2026. International Arbitration Law No. 4686 (Official Gazette 24453, 5 July 2001, as amended by Law No. 7101); Code of Civil Procedure No. 6100, Articles 407 to 444; Private International and Procedural Law No. 5718, Articles 1, 55 to 57 and 60 to 63; Law No. 4501 on arbitration in public service concession contracts; the UNCITRAL status table of the 1958 New York Convention; the ICSID list of contracting states (ICSID/3, 9 June 2020); the Energy Charter Secretariat's page for Türkiye; the Istanbul Arbitration Centre Arbitration Rules, Emergency Arbitrator Rules and fast track page.

Two statutes, and the foreign element that chooses between them

Law No. 4686 applies to disputes that carry a foreign element and are seated in Turkey, or in which the parties or the tribunal have chosen the Law; its Articles 5 and 6, on the arbitration objection in court and on interim relief, apply even when the seat is abroad. Article 2 defines the foreign element widely: parties with domiciles, habitual residences or places of business in different states; a seat, place of performance or closest connection outside the parties' state; a shareholder of a contracting company who brought in foreign capital under the foreign investment legislation, or a contract that needs foreign loan or security agreements; or a contract that moves capital or goods from one country to another. A dispute without any of these is domestic and falls under Articles 407 to 444 of the Code of Civil Procedure, drafted on the same model and reading almost identically, with the differences in the table. Both statutes exclude the same subjects: disputes over rights in rem in immovable property in Turkey, and disputes not within the parties' free disposal, cannot be arbitrated at all. A construction dispute is arbitrable; a claim to be registered as owner of a Turkish plot is not, and stays with the courts on the land registry page.

The arbitration agreement and how a Turkish court treats it

Article 4 requires writing, satisfied by a signed document, an exchange of letters, faxes or electronic messages, a reference to a document containing the clause, or a claim in a statement of case that the defendant fails to contest in its answer. The agreement is valid if it complies with the law the parties chose for it or, absent a choice, with Turkish law; it cannot be attacked on the ground that the main contract is invalid or that the dispute had not yet arisen, and Article 7(H) lets the tribunal rule on its own jurisdiction with the clause treated as independent of the contract. If one party sues in a Turkish court despite the clause, Article 5 allows the other to raise the arbitration objection as a preliminary objection, in practice in the first answer, and the court dismisses the action on procedural grounds; a defendant who argues the merits first loses the objection. Article 8(B) allows representation by foreign lawyers or foreign entities in the arbitration itself, but not in the court applications the Law provides for, where a Turkish advocate is needed.

Arbitrators, seat, language and the one-year clock

Article 7 leaves the number of arbitrators to the parties provided it is odd and supplies three by default. Absent an agreed mechanism, each party appoints one and the two choose the chair; if a party fails to appoint within thirty days of the request, or the two cannot agree within thirty days, the civil court of first instance appoints on application, finally. The court must respect the parties' agreement, the arbitrators' independence and, where the parties are of different nationalities, the principle that a sole arbitrator is of neither party's nationality and that two of three arbitrators are not of one party's nationality. An arbitrator must disclose circumstances that justify doubts about impartiality; a challenge must be raised within thirty days of learning the ground and, if the tribunal rejects it, taken to the court within a further thirty days. Article 9 lets the parties or their institution fix the seat. Article 10(C) permits the proceedings in Turkish or in the official language of any state recognised by Turkey, chosen by the parties or, failing that, by the tribunal. Article 10(B) requires the award on the merits within one year from the sole arbitrator's appointment or the tribunal's first meeting; the parties may extend, the court may extend on application if they cannot agree, and if the court refuses the arbitration ends when the period runs out. Under Article 12(C) the tribunal applies the rules of law the parties chose, otherwise the substantive law of the state most closely connected with the dispute; a decision in equity needs express authority. Article 16 lets the arbitrators' fees be fixed by agreement, by reference to institutional rules or, failing both, by the Ministry of Justice tariff, and makes costs follow the event unless agreed otherwise.

Interim measures: what the tribunal can and cannot do

Article 6 draws the line. A party may ask a Turkish court for a preliminary injunction or precautionary attachment before or during the arbitration without breaching the clause, and a party that obtains such an order must commence the arbitration within thirty days or the order lapses. The tribunal may itself order interim measures or attachment, against security if it wishes, but it cannot make orders that require execution offices or other public authorities to act, and it cannot bind third parties; where a party ignores a tribunal's order, the other applies to the court for an order in the same terms. Where the real objective is to freeze a Turkish bank account or a plot, the route is therefore the court, on the standards on the asset seizure page, with the arbitration running alongside.

The Istanbul Arbitration Centre

The Istanbul Arbitration Centre is an independent institution whose Arbitration and Mediation Rules entered into force on 26 October 2015 and which administers domestic and international cases without any membership requirement. Under its Arbitration Rules the parties fix the number of arbitrators, odd if more than one, and where they are silent the Board decides between a sole arbitrator and a tribunal of three on the circumstances of the case (Article 13); a sole arbitrator not agreed within thirty days of notification of the request is appointed by the Board, as is an arbitrator a party fails to nominate (Article 14). The seat is Istanbul unless the parties agree otherwise (Article 23); the language is the parties' choice, otherwise the tribunal's, with translations for documents in other languages (Article 24); the tribunal draws up terms of reference after the request and answer (Article 26) and must render the award within six months of their signature or of the Board's approval of the timetable, extendable by the Board (Article 33); the proceedings are confidential unless the parties agree otherwise (Article 21). Two further procedures matter to a party in a hurry. Under the Emergency Arbitrator Rules in Appendix 1, which apply unless excluded in writing, the President of the Board appoints the emergency arbitrator within two working days of the application, the arbitrator decides within seven days of receiving the file, and the decision binds the parties until the tribunal revisits it. Under the Fast Track Arbitration Rules, disputes whose value does not exceed TRY 5,000,000 are decided by a sole arbitrator within three months unless the parties agree otherwise. Whether to choose the Centre over a foreign institution depends on the counterparty, the assets and the likely enforcement forum, and I answer it case by case.

Attacking the award: the set-aside action

Article 15(A) makes the set-aside action the only recourse against a Turkish-seated international award. Since 15 March 2018, when Law No. 7101 amended the provision, the action is filed with the regional court of appeal for the place of the competent first-instance court and heard with priority. The applicant must prove one of the listed grounds: incapacity of a party or invalidity of the arbitration agreement under its governing law or Turkish law; a tribunal not constituted as agreed or as the Law requires; an award rendered out of time; a wrong decision by the tribunal on its own jurisdiction; an award beyond the agreement, incomplete or in excess of authority; a procedure not conducted as agreed or as the Law provides, where that affected the merits; or a breach of the equality of the parties. The court raises two grounds itself: that the dispute was not arbitrable under Turkish law, and that the award is contrary to public policy. Where an award exceeds the agreement on a severable point, only that part is set aside. The action must be filed within thirty days of notification of the award or of any correction, interpretation or supplementary award, and filing it suspends enforcement automatically. The court decides on the file unless it orders otherwise, and its judgment may be appealed to the Court of Cassation, limited to the set-aside grounds. The provision a foreign investor should read twice is the waiver: parties domiciled or habitually resident outside Turkey may, by an express statement in the arbitration agreement or by later written agreement, waive the action entirely or for particular grounds. Domestic arbitration under the Code differs in three respects: the time limit is one month, filing does not suspend enforcement unless the court so orders against security covering the sum awarded, and no advance waiver is provided.

Making a Turkish award enforceable

Under Article 15(B), once the judgment rejecting the set-aside action has become final, the civil court of first instance issues, on request and without a fee, a certificate that the award is enforceable; the execution of the award itself is subject to the Fees Law. Where the thirty days have passed without an action, or the parties waived it, the court issues the certificate after checking arbitrability and public policy on its own motion. With the certificate the award is executed through the enforcement offices like a Turkish judgment, as described on the debt collection page and on the page for claims against Turkish companies.

Enforcing a foreign award in Turkey

Turkey acceded to the 1958 New York Convention on 2 July 1992 and it entered into force on 30 September 1992, with the two permitted reservations: Turkey applies the Convention only to awards made in the territory of another contracting state, and only to disputes regarded as commercial under Turkish law. Article 1(2) of the Private International Law Code reserves international conventions, so for awards from the other contracting states the Convention's grounds govern, and the Code's Articles 60 to 63 supply the procedure and cover the residual cases. The application is a petition to the civil court of first instance at the place the parties agreed in writing, otherwise at the defendant's Turkish domicile, failing that its residence, failing that the place of assets that could be executed against (Article 60). It is filed with the original or certified copy of the arbitration agreement and of the award, final and binding under its own law, with certified translations (Article 61). The court refuses enforcement where there is no arbitration agreement, where the award offends morality or public policy, or where the dispute is not arbitrable under Turkish law, and, on proof by the defendant, where a party was not properly represented and did not later ratify, where the defendant was not duly notified of the appointment or was deprived of the right to be heard, where the agreement is invalid under its governing law or the law of the seat, where the tribunal or procedure departed from the agreement or the law of the seat, where the award exceeds the agreement, for that part, or where it is not yet binding or has been set aside at the seat (Article 62). The procedure follows the rules for foreign judgments by analogy: the petition is served with a hearing date, the simplified procedure applies, the defendant may raise only the listed defences or performance, the appeal suspends execution, and the enforced award is executed like a Turkish judgment. The parallel route for court judgments, with the reciprocity condition that applies to them and not to awards, is on the foreign judgment enforcement page.

The investment treaty layer

Treaty arbitration against the state is a second protection, and Turkey is inside both systems. Turkey signed the ICSID Convention on 24 June 1987, deposited its ratification on 3 March 1989 and has been a contracting state since 2 April 1989. It signed the Energy Charter Treaty on 17 December 1994, ratified it on 13 February 2001 and has been bound since 4 July 2001. Its bilateral investment treaties, listed by the Ministry of Industry and Technology, provide the consent on which an investor-state claim rests, and each must be read for its own definition of investor, cooling-off period and forum. For public service concessions, Law No. 4501 permits a contract with a foreign element, defined by a foreign-capital shareholder or by the need for foreign financing or security, to provide for arbitration seated in Turkey or abroad, under Turkish or foreign law, or before an international institution, and requires the clause to settle the rules, seat, arbitrators, language, applicable law, evidence, time limits and costs in detail; Law 4686 then governs the arbitration. The broader protections are on the foreign investment guide, the map of Turkish courts for a foreign party is on the lawyers for foreigners page, and the equivalent choice on the other side of the Adriatic is on the Montenegro arbitration or court page.

Drafting for Turkey: the points that decide the case later

Name the seat and the rules expressly, because the seat decides which statute applies, which court assists and where the award can be attacked. Fix the language and the number of arbitrators, with an appointing authority, so that a recalcitrant counterparty cannot force a court appointment. If the investor is domiciled abroad and wants finality, add the express waiver of the set-aside action that Article 15(A) allows. And check the enforcement forum before the seat is chosen: an award against a Turkish party with Turkish assets will be enforced in Turkey either way, and the public policy and arbitrability checks apply under the Convention and through the certificate alike.

Whose side we are on, and how we are paid

The counterparty's lawyer drafted the clause for the counterparty. The institution administers the case and takes no position on whether it should have been brought. None of them is paid to tell you, before signature, that your seat leaves your award attackable, that your interim relief must come from a Turkish court anyway, or that your subject matter is not arbitrable at all.

We take no commission or referral fee from arbitral institutions, arbitrators, experts or enforcement agents, in any form, on any file. The fee you pay us is our only income from your matter, and it does not depend on whether the case goes to arbitration or to court, or on the outcome. Because our position does not move with the forum, advising you that a Turkish court action would serve you better, or that a clause should not be signed as drafted, costs us nothing to say.

One boundary, stated plainly. We are lawyers, not licensed investment advisers and not arbitrators for hire. We do not decide whether your project makes commercial sense. What we protect is the Turkish legal position: a clause that is valid and enforceable in Turkey, the arbitration objection raised in time, the court applications that need a Turkish advocate, the set-aside action or its waiver, the enforceability certificate, and the enforcement of a foreign award against assets here.

Before the clause is signed, or the award is sent for enforcement

Send us the clause, the parties and their domiciles, the assets in Turkey, and, if there is already an award, the award, the agreement and the notification correspondence. We will tell you which statute applies, whether the subject is arbitrable, what the clause needs, what the set-aside exposure is and whether it can be waived, and how the award is enforced against the assets. Our enforcement work is described on the enforcement and insolvency page.

What this page does not settle

Consumer and employment arbitration, the mandatory mediation before commercial court actions, the arbitrators' fee tariff, the treaty-by-treaty terms of Turkey's investment agreements, and the taxation of awards are separate subjects. Court practice on public policy is a moving body of case law and is not summarised here.