Av. Dr. Arzu ONGUR, PhD
Ongur & Partners International Law Office, Istanbul, Türkiye
Abstract: Türkiye has, over the past two decades, developed a modern and internationally aligned legal architecture for the resolution of cross-border commercial and investment disputes through arbitration. Anchored by International Arbitration Law No. 4686 of 2001, which closely follows the UNCITRAL Model Law, and reinforced by Türkiye’s adherence to the New York Convention, the European Convention on International Commercial Arbitration, and the ICSID Convention, the country has positioned itself as an increasingly credible seat for international arbitration. The establishment of the Istanbul Arbitration Centre (ISTAC) has further strengthened institutional capacity. This article examines the historical evolution, statutory framework, treaty commitments, institutional infrastructure, and enforcement practice governing arbitration in Türkiye by perception of an arbitration lawyer, and considers the principal challenges and opportunities as Türkiye seeks to consolidate its role as a regional dispute resolution hub, with particular relevance to the energy and foreign direct investment sectors.
Keywords: international arbitration, Türkiye, Law No. 4686, ISTAC, New York Convention, ICSID, investment disputes, energy arbitration, Turkish Arbitration Law, Arbitration Lawyer, İstanbul Arbitration Center
I. Introduction
Arbitration has become an increasingly preferred mechanism for resolving international commercial and investment disputes involving Turkish parties, foreign investors, and cross-border transactions. This trend reflects both a global shift toward private dispute resolution mechanisms that offer neutrality, confidentiality, and enforceability across borders, and a deliberate policy effort by Türkiye to modernize its legal infrastructure in order to attract foreign direct investment. Türkiye’s strategic geographic position bridging Europe, Asia, and the Middle East, combined with its active role in large-scale energy, infrastructure, and construction projects, has made the reliability of its arbitration framework a matter of considerable practical importance for arbitration lawyers in Türkiye advising cross-border clients.
This article provides an overview of the legal and institutional framework governing arbitration in Türkiye with perception of an arbitration lawyer in Türkiye, tracing its historical development, examining the principal statutory sources, reviewing Türkiye’s international treaty commitments, and assessing the enforcement landscape for arbitral awards. The article closes with observations on recent trends and the outlook for arbitration practice in Türkiye, with particular attention to sectors of high foreign investment activity such as energy. As an İstanbul law firm, the actual experiences of the author create a particular understanding on the subject.
II. Historical Development of Arbitration Law in Türkiye
Prior to 2001, arbitration proceedings in Türkiye, whether domestic or international, were governed by the general provisions of the Civil Procedure Law of 1927 (Law No. 1086). Those provisions had been drafted with domestic arbitration in mind and proved increasingly inadequate for the needs of parties to cross-border disputes, who required greater procedural certainty, party autonomy, and alignment with internationally accepted standards by arbitration lawyers in Türkiye.
In response, the Turkish legislature enacted International Arbitration Law No. 4686 in 2001, closely modelled on the UNCITRAL Model Law on International Commercial Arbitration. The stated aim of the new law was to position Türkiye as a centre for international arbitration and to enhance the confidence of foreign investors in the Turkish legal system and make contribution to the arbitration lawyers in Türkiye. This was followed in 2007 by the Code on International Private and Procedural Law No. 5718, which governs choice-of-law questions, jurisdiction of Turkish courts, and recognition and enforcement of foreign judgments, and which complements the arbitration-specific framework. In 2011, the enactment of the Code of Civil Procedure No. 6100 introduced a modernized statutory basis for domestic arbitration, largely mirroring the structure of Law No. 4686 so as to bring domestic and international arbitration practice into closer alignment.
This layered legislative development reflects a deliberate and gradual harmonization of Turkish arbitration law with international norms, culminating in a framework that is now widely regarded by arbitration lawyers as modern, arbitration-friendly, and broadly familiar to foreign counsel accustomed to UNCITRAL-based systems.
III. The Legal Framework Governing International Arbitration in Türkiye
A. A Dual-Track System
Türkiye currently operates a dual-track statutory arbitration system. International Arbitration Law No. 4686 applies where the seat of arbitration is in Türkiye and the dispute contains a foreign element, or where the parties have expressly chosen the law to govern their proceedings. A foreign element is generally understood to exist where the parties are domiciled or habitually resident in different states, where the subject matter of the dispute is connected to more than one state, or where performance under the relevant contract occurs outside Türkiye. Purely domestic arbitrations, lacking any such foreign element, instead fall under the arbitration provisions of the Code of Civil Procedure No. 6100.
Because both statutes are modelled closely on the UNCITRAL Model Law, foreign counsel encountering Turkish arbitration for the first time generally find the conceptual architecture familiar, even where specific procedural details diverge from their home jurisdictions.
B. Party Autonomy
A defining feature of Turkish arbitration law is its emphasis on party autonomy for arbitration law in Türkiye. Parties are, in general, free to determine the number of arbitrators, the procedure to be followed, the seat and language of the proceedings, İstanbul arbitration lawyer and the substantive law applicable to the merits of the dispute. Law No. 4686 requires, however, that the number of arbitrators be odd, and it establishes default rules that apply in the absence of party agreement, including mechanisms for the appointment of arbitrators by the competent Turkish court where the parties fail to reach agreement.
C. The Arbitration Agreement
Law No. 4686 sets out formal and substantive conditions for the validity of an arbitration agreement, generally requiring that it be in writing and that it evidence the parties’ clear intention to submit present or future disputes arising from a defined legal relationship to arbitration. Turkish courts have generally adopted an arbitration-friendly posture in interpreting the scope and validity of arbitration clauses, consistent with the broader policy objectives underlying the 2001 reform in Türkiye.
D. Interim Measures and Tribunal Powers
Unless the parties have agreed otherwise, an arbitral tribunal constituted under Law No. 4686 is empowered to order interim or conservatory measures and, in appropriate circumstances, preliminary determinations necessary to preserve the effectiveness of the eventual award requested by arbitration lawyers in Türkiye. Turkish courts retain a supporting and supervisory role, including in respect of the appointment and challenge of arbitrators and the setting aside of awards on the limited grounds specified in the law.
IV. Türkiye’s International Treaty Commitments
A. The New York Convention
Türkiye ratified the 1958 New York Convention on the Recognition and Enforcement of Foreign Arbitral Awards in 1991 and incorporated its principles into domestic law principally through Law No. 4686 and Law No. 5718. Türkiye’s accession was made subject to two reservations of continuing practical relevance. First, the reciprocity reservation confines recognition and enforcement to awards rendered in the territory of another contracting state; given that well over one hundred and seventy states are now parties to the Convention, this reservation rarely presents a practical obstacle, though counsel must always verify the seat of the award in question. Second, Türkiye applies a commercial reservation, limiting the Convention’s application to disputes considered commercial in nature under Turkish law.
B. The European Convention on International Commercial Arbitration
Türkiye is also a party to the 1961 European Convention on International Commercial Arbitration, ratified alongside the New York Convention in 1991, which supplements the recognition and enforcement regime in respect of arbitration between parties from contracting states.
C. The ICSID Convention and Investment Arbitration
Türkiye ratified the 1965 Washington Convention establishing the International Centre for Settlement of Investment Disputes (ICSID) in 1987. Together with the network of bilateral investment treaties to which Türkiye is party, this has made investor-State arbitration a significant avenue for foreign investors, particularly in capital-intensive sectors such as energy, infrastructure, and natural resources, where disputes frequently implicate questions of regulatory change, expropriation, and fair and equitable treatment standards.
V. Institutional Arbitration: The Rise of ISTAC
A significant institutional development in Türkiye’s arbitration landscape has been the establishment of the Istanbul Arbitration Centre (ISTAC). Conceived as part of a broader strategy to position Istanbul as a regional and international arbitration seat, ISTAC offers institutional arbitration and mediation services under its own procedural rules, supported by a panel of arbitrators drawn from Türkiye and abroad. The development of ISTAC has been widely credited with enhancing the practical infrastructure available to parties choosing Türkiye as a seat, complementing the statutory framework established under Law No. 4686 and providing an institutional alternative to ad hoc arbitration and to the use of foreign arbitral institutions in disputes with a Turkish connection.
VI. Recognition and Enforcement of Foreign Arbitral Awards
The enforcement of foreign arbitral awards in Türkiye is not automatic. Even where a dispute has been finally resolved through arbitration seated abroad, the resulting award must be submitted to and reviewed by the competent Turkish court before it can be executed against assets or parties within Türkiye. This review is generally limited to the grounds recognized under the New York Convention and Turkish private international law, including questions of arbitrability, proper notice, and compliance with Turkish public policy, rather than a re-examination of the merits of the underlying dispute.
Recent case law has continued to refine the scope of the public policy exception as applied by Turkish courts to both foreign court judgments and foreign arbitral awards, with a discernible trend toward a narrower and more predictable application of the exception, consistent with the pro-enforcement orientation that has generally characterized Turkish judicial practice since the 2001 reform.
VII. Recent Developments and Sectoral Relevance
Arbitration practice in Türkiye continues to evolve alongside the country’s economic priorities. The energy sector, in particular, has generated a substantial share of high-value arbitration activity, reflecting the scale of investment in generation, transmission, and related infrastructure, and the corresponding exposure of both host-state and investor parties to regulatory and contractual risk. Disputes arising from power purchase agreements, concession arrangements, and regulatory measures affecting the energy sector have accordingly become a recurring feature of both institutional arbitration before ISTAC and investor-State proceedings before ICSID and ad hoc tribunals.
More broadly, Turkish policymakers and practitioners have continued to discuss further legislative consolidation, including proposals to bring domestic and international arbitration procedure into still closer alignment under a unified statutory framework, a proposal that remains the subject of ongoing debate within the profession.
VIII. Challenges and Outlook
Notwithstanding the progress of the past two decades, certain structural features continue to warrant attention from foreign counsel and investors. The dual-track statutory system, while conceptually coherent, requires careful analysis at the outset of any dispute to determine whether Law No. 4686 or the Code of Civil Procedure governs a given arbitration. The commercial reservation under the New York Convention likewise requires care in disputes at the margins of what Turkish law treats as a commercial matter. Enforcement, while generally reliable, remains subject to judicial review that can extend proceedings beyond what parties may initially anticipate.
Looking forward, continued institutional investment in ISTAC, further refinement of the statutory framework, and the accumulation of a body of predictable, arbitration-friendly case law are likely to remain the principal drivers of Türkiye’s development as a regional arbitration hub. For practitioners advising clients in energy, infrastructure, and foreign direct investment matters, a sound understanding of this evolving framework remains essential to effective risk management and dispute resolution strategy.
IX. Conclusion
Türkiye’s arbitration framework, built upon Law No. 4686 and reinforced by the country’s adherence to the New York Convention, the European Convention on International Commercial Arbitration, and the ICSID Convention, reflects a sustained and largely successful effort to align Turkish practice with international standards. The establishment of ISTAC has added meaningful institutional depth to this framework. As cross-border investment in Türkiye, particularly in the energy sector, continues to generate disputes of increasing complexity and value, the continued development of a predictable, arbitration-friendly legal environment will remain central to Türkiye’s ambition to serve as a trusted seat for international dispute resolution.
References
- International Arbitration Law No. 4686, Official Gazette, 5 July 2001.
- Code of Civil Procedure No. 6100, Official Gazette, 12 January 2011.
- Code on International Private and Procedural Law No. 5718, Official Gazette, 27 November 2007.
- UNCITRAL Model Law on International Commercial Arbitration (1985, as amended).
- Convention on the Recognition and Enforcement of Foreign Arbitral Awards (New York, 1958).
- European Convention on International Commercial Arbitration (Geneva, 1961).
- Convention on the Settlement of Investment Disputes between States and Nationals of Other States (Washington, 1965).
- Istanbul Arbitration Centre (ISTAC), Arbitration and Mediation Rules.
- Global Arbitration Review, “Türkiye’s Arbitration Landscape: Key Legal Frameworks, Institutions and Recent Developments,” The European Arbitration Review 2026.
Author: Av. Dr. Arzu ONGUR, PhD — Ongur & Partners International Law Office, Istanbul.
