Investment Arbitration and Foreign Investors in Turkey: Legal Protection, Treaty Claims and Dispute Resolution

Introduction

Türkiye has become an important destination for foreign investment in sectors such as energy, construction, manufacturing, technology, transportation, healthcare, finance, real estate, mining and infrastructure. According to the Presidency of the Republic of Türkiye Investment Office, Türkiye attracted USD 13.1 billion in foreign direct investment during 2025.

Foreign investors establishing companies, acquiring shares, developing infrastructure projects or entering into long-term agreements with Turkish public entities may face risks that differ from ordinary commercial risks. These may include regulatory changes, cancellation of licences, discriminatory treatment, restrictions on the transfer of profits, administrative measures, termination of concessions, expropriation and conduct attributed to state authorities.

Investment arbitration provides a mechanism through which qualifying foreign investors may submit certain disputes against a host state to an independent international tribunal. Unlike ordinary commercial arbitration, investment arbitration does not always depend on an arbitration clause contained in a private contract. The state’s consent may arise from a bilateral investment treaty, a multilateral treaty, domestic legislation or an investment agreement concluded directly with the investor.

However, the existence of a foreign investment in Türkiye does not automatically create a right to commence international arbitration. The investor must identify a valid legal basis for consent, satisfy the nationality and investment definitions, comply with any waiting periods or procedural conditions and establish that the alleged state conduct breaches a legally binding investment obligation.

This comprehensive guide examines investment arbitration and foreign investors in Turkey, including Foreign Direct Investment Law No. 4875, bilateral investment treaties, ICSID arbitration, Energy Charter Treaty claims, expropriation, fair and equitable treatment, jurisdictional conditions, damages and enforcement of investment arbitral awards.

What Is Investment Arbitration?

Investment arbitration is a dispute resolution mechanism used for certain disputes between a foreign investor and the state hosting the investment.

The claimant is usually:

• A foreign natural person;
• A company incorporated in another country;
• A qualifying foreign-controlled company;
• In some circumstances, a locally incorporated investment company treated as foreign-controlled under the applicable instrument.

The respondent is generally:

• The Republic of Türkiye;
• Another sovereign state where a Turkish investor has invested;
• In some cases, a public authority or state entity whose conduct may legally be attributed to the state.

Investment arbitration must be distinguished from international commercial arbitration.

Commercial arbitration

Commercial arbitration usually concerns a private contract between companies or commercial organisations. The tribunal’s jurisdiction arises from an arbitration clause or separate arbitration agreement signed by the parties.

Examples include disputes under:

• Construction contracts;
• Supply agreements;
• Share purchase agreements;
• Joint venture agreements;
• Distribution agreements;
• Technology contracts;
• Financing documents.

Investment arbitration

Investment arbitration generally concerns alleged violations of obligations owed by a host state to a protected foreign investor.

The legal basis may be:

• A bilateral investment treaty;
• A treaty containing investment protections;
• The Energy Charter Treaty;
• An investment contract;
• Domestic investment legislation containing valid arbitration consent.

A single project may generate both commercial and investment claims. For example, a foreign contractor may have a contractual claim against a Turkish public enterprise while the foreign shareholder separately alleges that sovereign state measures violated an investment treaty.

Foreign Direct Investment Law No. 4875

The principal general legislation governing foreign direct investment in Türkiye is the Foreign Direct Investment Law No. 4875.

The law defines a foreign investor to include foreign nationals, Turkish nationals residing abroad, foreign legal entities and international institutions making qualifying direct investments in Türkiye. It also recognises foreign investment through the establishment of a company or branch, acquisition of shares, imported capital, machinery, intellectual property rights, reinvested earnings and commercial rights concerning natural resources.

Law No. 4875 is based on several important principles.

Freedom to invest and national treatment

Unless an international agreement or special law provides otherwise, foreign investors are free to make direct investments and are subject to equal treatment with domestic investors.

National treatment does not mean that all sectors are entirely free from regulation. Banking, insurance, energy, mining, telecommunications, aviation, defence and other regulated sectors may require licences, approvals or compliance with special legislation.

Protection against expropriation

Foreign investments may not be expropriated or nationalised except for a public interest purpose, in accordance with due process and upon payment of compensation.

The protection is relevant not only to formal transfer of legal title. Depending on the applicable treaty, state conduct that substantially deprives an investment of its use, value or economic benefit may also be examined as indirect expropriation.

Free transfer of investment proceeds

Law No. 4875 permits foreign investors to transfer abroad profits, dividends, proceeds from sale or liquidation, compensation, licensing payments and amounts connected with foreign loans through banks or authorised financial institutions.

The precise application of transfer rights remains subject to tax, banking, anti-money-laundering, sanctions and other mandatory legal requirements.

Dispute settlement

Article 3 permits disputes arising from private-law investment agreements and qualifying public service concession arrangements to be submitted to local courts, domestic or international arbitration or another agreed dispute resolution mechanism where the applicable conditions are fulfilled and the parties have agreed.

This provision should not be treated as automatic and unconditional consent by Türkiye to arbitrate every dispute with every foreign investor. A claimant must still establish a valid agreement or treaty basis authorising arbitration.

Bilateral Investment Treaties of Türkiye

A bilateral investment treaty, commonly known as a BIT, is an agreement between two states concerning the promotion and protection of investments made by investors of each state in the territory of the other.

Türkiye has developed an extensive network of bilateral investment treaties. The Ministry of Trade identifies common protections in Türkiye’s treaty practice, including national treatment, most-favoured-nation treatment, fair and equitable treatment, full protection and security, protection against expropriation, free transfer of returns and access to international dispute settlement.

Official public sources currently present differing totals concerning the number of Turkish BITs in force. Investors should therefore avoid relying only on a general treaty count and should verify the specific treaty text, ratification status, entry-into-force date, termination history and any survival clause applicable to their investment. UNCTAD maintains a country-specific international investment agreement database that can assist with this initial verification.

The existence of a BIT between Türkiye and the investor’s home state is only the beginning of the legal analysis. Counsel must examine:

• Whether the treaty is currently in force;
• Whether it applied when the investment was made;
• Whether it applied when the alleged breach occurred;
• Whether a terminated treaty contains a sunset clause;
• Whether the investor qualifies under the nationality definition;
• Whether the relevant asset qualifies as an investment;
• Whether the investor complied with applicable law;
• Whether investor-state arbitration is available;
• Which arbitration forums are permitted;
• Whether a waiting period applies;
• Whether local court proceedings affect arbitration rights.

Different Turkish BITs contain materially different language. Older treaties may provide broader and less detailed standards, while newer treaties may contain more precise definitions, regulatory exceptions, limitation periods and procedural requirements.

Türkiye and the ICSID Convention

Türkiye is a contracting state to the Convention on the Settlement of Investment Disputes between States and Nationals of Other States, commonly known as the ICSID Convention. Türkiye signed the Convention in 1987 and deposited its instrument of ratification in 1989.

ICSID membership alone does not mean that Türkiye has consented to arbitrate every investment dispute.

Under Article 25 of the ICSID Convention, the Centre’s jurisdiction generally requires:

1. A legal dispute;
2. Arising directly out of an investment;
3. Between an ICSID contracting state and a national of another contracting state;
4. Written consent of both parties to ICSID arbitration.

The ICSID Convention provides the institutional framework, but the state’s consent must usually be found in a BIT, multilateral treaty, domestic law or investment contract.

Consent is therefore a jurisdictional requirement rather than a procedural formality.

Sources of Consent to Investment Arbitration

A foreign investor considering arbitration against Türkiye should identify the exact source of the state’s consent.

Consent through a bilateral investment treaty

A BIT may contain a standing offer by the state to arbitrate qualifying disputes. The investor accepts that offer by filing an arbitration request in accordance with the treaty.

The treaty may permit:

• ICSID arbitration;
• ICSID Additional Facility arbitration;
• Ad hoc arbitration under the UNCITRAL Rules;
• Another agreed institution;
• A choice between domestic courts and arbitration.

The precise wording must be followed.

Consent through a multilateral treaty

Certain investment protections and arbitration rights may arise from a multilateral treaty.

The Energy Charter Treaty has historically been particularly relevant to investments in electricity, petroleum, natural gas, renewable energy, pipelines and energy infrastructure.

Türkiye signed the Energy Charter Treaty in 1994, ratified it in 2001 and is listed by the Energy Charter Secretariat as a contracting party.

The Energy Charter framework has undergone significant change. Amendments concerning modernisation were adopted in December 2024, while several other contracting parties have withdrawn or notified withdrawal. The applicable treaty relationship must therefore be verified according to the investor’s nationality, date of investment, date of the alleged conduct, ratification status, withdrawal provisions and any continuing protection under the treaty’s sunset mechanism.

Consent through an investment contract

Türkiye or a Turkish public entity may enter into an investment agreement containing an arbitration clause.

Such agreements may concern:

• Public infrastructure;
• Energy projects;
• Concessions;
• Mining;
• Transport;
• Healthcare projects;
• Public-private partnerships.

A contract-based arbitration claim is not automatically the same as a treaty claim. The tribunal must distinguish between breach of the commercial contract and breach of international investment obligations.

Consent through domestic legislation

Domestic investment legislation can, in some countries, contain an offer to arbitrate. In Türkiye, Law No. 4875 recognises national and international arbitration where applicable conditions are met and the parties agree. It should not be interpreted without further analysis as unconditional unilateral consent covering every foreign investor dispute.

Jurisdictional Requirements

Investment arbitration frequently begins with extensive jurisdictional objections.

Nationality of the investor

The claimant must qualify as an investor of the other contracting state.

For an individual, nationality may depend on:

• Citizenship;
• Dual nationality;
• Residence;
• Effective nationality;
• Treaty-specific exclusions.

For a company, relevant factors may include:

• Place of incorporation;
• Registered office;
• Effective management;
• Control;
• Ownership;
• Substantial business activity.

A company incorporated in a treaty country may not always receive protection if the treaty contains denial-of-benefits provisions or requires genuine economic activity.

Existence of a protected investment

The relevant treaty defines what constitutes an investment.

Protected assets may include:

• Company shares;
• Concession rights;
• Contractual rights;
• Loans;
• Real estate;
• Intellectual property;
• Licences;
• Claims to money;
• Rights concerning natural resources;
• Machinery and equipment.

An ordinary one-off commercial sale may not necessarily qualify as an investment.

Under ICSID arbitration, the claimant must also satisfy the jurisdictional framework of Article 25 of the ICSID Convention.

Legality of the investment

Many investment treaties protect only investments made in accordance with the host state’s laws.

Jurisdiction or admissibility may be challenged where the investment involved:

• Fraud;
• Corruption;
• Misrepresentation;
• Unlawful licensing;
• Breach of foreign ownership restrictions;
• Concealment of beneficial ownership;
• Material regulatory violations.

Foreign investors should conduct legal due diligence and preserve evidence demonstrating lawful establishment and operation of the investment.

Temporal jurisdiction

A treaty tribunal may only exercise jurisdiction over matters falling within the treaty’s temporal scope.

Relevant dates include:

• Entry into force of the treaty;
• Date the investor acquired nationality;
• Date the investment was made;
• Date the dispute arose;
• Date of the alleged state measure;
• Date of treaty termination;
• Duration of any sunset clause.

Restructuring ownership after a dispute has become foreseeable may not create valid treaty jurisdiction and may be characterised as an abuse of process.

Compliance with procedural conditions

A treaty may require:

• Written notice of dispute;
• A consultation period;
• A cooling-off period;
• Negotiation;
• Recourse to domestic courts for a specified period;
• Waiver of other proceedings;
• Filing within a limitation period.

Failure to comply may lead to jurisdictional or admissibility objections.

Fork-in-the-Road Clauses

Some treaties require the investor to choose between domestic courts and international arbitration.

Where a fork-in-the-road clause applies, commencing litigation before Turkish courts may affect the investor’s ability to pursue treaty arbitration.

The effect depends on the specific wording and whether the domestic and international proceedings concern:

• The same parties;
• The same fundamental cause of action;
• The same legal dispute;
• The same relief.

Foreign investors should obtain treaty advice before filing domestic proceedings, accepting a contractual forum or signing a settlement agreement.

Substantive Standards of Investment Protection

Fair and Equitable Treatment

Fair and equitable treatment, commonly abbreviated as FET, is one of the most frequently invoked investment treaty standards.

Depending on the treaty, FET may concern:

• Arbitrary state conduct;
• Lack of due process;
• Denial of justice;
• Discrimination;
• Fundamental procedural unfairness;
• Lack of transparency;
• Frustration of specific assurances;
• Manifestly inconsistent regulatory treatment.

FET does not ordinarily freeze the legal system permanently. States retain authority to regulate taxation, environment, health, energy, competition, labour and public safety.

An investor should distinguish between an ordinary regulatory change and conduct serious enough to breach the treaty standard.

Full Protection and Security

Full protection and security may require the host state to take reasonable measures to protect the investment.

Traditionally, the standard was associated with physical protection. Depending on the treaty and tribunal’s interpretation, arguments may also concern legal security.

The obligation is generally one of due diligence rather than absolute liability. A state does not guarantee that no third party will ever damage an investment.

National Treatment

National treatment protects foreign investors against less favourable treatment compared with domestic investors in comparable circumstances.

A claimant should identify:

• The relevant domestic comparator;
• Similarity of circumstances;
• Difference in treatment;
• Whether a legitimate regulatory reason exists.

Different treatment is not automatically discriminatory where the compared investors operate under materially different legal, economic or regulatory conditions.

Most-Favoured-Nation Treatment

Most-favoured-nation treatment, commonly known as MFN treatment, generally requires the host state not to treat protected investors less favourably than investors from a third state in comparable circumstances.

Whether an MFN clause may be used to import substantive or procedural benefits from another treaty is highly dependent on treaty wording and applicable jurisprudence.

Investors should not assume that an MFN clause automatically replaces unfavourable dispute settlement conditions.

Protection against Expropriation

Investment treaties typically regulate direct and indirect expropriation.

Direct expropriation

Direct expropriation involves a formal transfer, seizure or nationalisation of property.

Indirect expropriation

Indirect expropriation may arise where state measures do not formally transfer title but substantially deprive the investor of the economic use, control or value of the investment.

Examples may include:

• Cancellation of a fundamental licence;
• Permanent seizure of operational control;
• Destruction of core investment rights;
• Measures making the investment effectively unusable.

Not every loss of value amounts to expropriation. Non-discriminatory regulation adopted for legitimate public purposes may fall within the state’s regulatory powers, depending on proportionality, treaty wording, expectations and overall effect.

Law No. 4875 also protects foreign investment against expropriation and nationalisation except for public interest and upon compensation in accordance with due process.

Free Transfer of Funds

Investment treaties may guarantee the transfer of:

• Profits;
• Dividends;
• Sale proceeds;
• Loan repayments;
• Compensation;
• Royalties;
• Management fees.

These protections remain subject to the wording of the treaty and may include exceptions concerning insolvency, taxation, criminal enforcement, financial stability or compliance with judgments.

Umbrella Clauses

Some treaties contain an umbrella clause requiring the host state to observe certain obligations entered into with protected investors.

An umbrella clause may potentially elevate qualifying contractual obligations into the treaty framework. However, not every Turkish BIT contains the same clause, and tribunals have taken different approaches to its scope.

A simple breach of contract should not automatically be characterised as a treaty violation without examining the treaty wording, nature of the state entity and conduct involved.

Common Investment Disputes in Türkiye

Investment disputes may arise in sectors including:

• Energy and renewable energy;
• Mining and natural resources;
• Construction and infrastructure;
• Transportation;
• Telecommunications;
• Banking and financial services;
• Healthcare;
• Manufacturing;
• Tourism;
• Public-private partnership projects.

Common allegations may concern:

• Revocation or non-renewal of licences;
• Changes to tariffs or support mechanisms;
• Cancellation of permits;
• Discriminatory administrative treatment;
• Unlawful termination of concessions;
• Transfer restrictions;
• Regulatory interference;
• Tax measures;
• Court or administrative delays;
• Expropriation;
• Failure to protect an investment.

An unfavourable administrative decision does not itself prove a treaty breach. The claimant must connect the state measure to a specific international obligation and establish jurisdiction, attribution, causation and loss.

Attribution of Conduct to the State

Investment arbitration concerns international responsibility of the state.

The investor must establish that the challenged conduct is attributable to Türkiye under the applicable rules.

Potential actors include:

• Ministries;
• Regulatory authorities;
• Municipalities;
• Courts;
• Public agencies;
• State-owned enterprises;
• Public project companies.

A state-owned enterprise is not automatically equivalent to the state for every purpose. Relevant questions may include whether it exercised governmental authority, acted under state instructions or functioned as an ordinary commercial company.

Attribution should be assessed separately from whether the conduct breached the treaty.

State Defences and Regulatory Powers

The host state may defend a claim by arguing that:

• No protected investment exists;
• The claimant lacks qualifying nationality;
• Consent was not established;
• The claim is time-barred;
• Procedural preconditions were not satisfied;
• The investment was unlawful;
• The relevant conduct is not attributable to the state;
• The measure was non-discriminatory regulation;
• No treaty standard was breached;
• The investor caused or contributed to the loss;
• Damages are speculative;
• The claim is barred by settlement or prior proceedings.

States retain the right to regulate in the public interest. Investment treaties do not generally guarantee a permanently unchanged legal and economic environment.

Damages in Investment Arbitration

A successful investor must establish both liability and loss.

Potential remedies may include:

• Compensation for expropriation;
• Fair market value;
• Sunk investment costs;
• Lost profits;
• Interest;
• Arbitration costs.

Common valuation methods include:

• Discounted cash flow;
• Comparable transactions;
• Market multiples;
• Asset-based valuation;
• Replacement cost;
• Historical investment cost.

Discounted cash flow analysis may be challenged where the project lacks a reliable operating history or future income depends on uncertain assumptions.

Damages experts should address:

• Causation;
• Valuation date;
• Future cash flows;
• Discount rates;
• Regulatory risk;
• Taxes;
• Debt;
• Mitigation;
• Contributory fault;
• Double recovery.

The investor cannot recover losses unrelated to the treaty breach.

Commencing an Investment Arbitration

A typical investment arbitration may involve:

1. Treaty and jurisdictional analysis;
2. Notice of dispute;
3. Consultation or cooling-off period;
4. Request for arbitration;
5. Registration or constitution of the tribunal;
6. Jurisdictional objections;
7. Written pleadings;
8. Document production;
9. Witness and expert evidence;
10. Hearing;
11. Costs submissions;
12. Final award;
13. Post-award remedies;
14. Recognition and enforcement.

The procedure may be conducted under ICSID, UNCITRAL or another applicable framework.

Investment arbitration is rarely an immediate remedy. The investor should develop a strategy before the dispute escalates.

Evidence in Investor-State Disputes

Important evidence may include:

• Investment agreements;
• Licences and permits;
• Corporate ownership records;
• Government correspondence;
• Regulatory decisions;
• Business plans;
• Financial models;
• Board minutes;
• Legal opinions;
• Project reports;
• Communications with public authorities;
• Expert valuation reports;
• Evidence of lawful investment.

Contemporaneous documents are generally more persuasive than explanations created after the dispute has arisen.

Foreign investors should maintain a clear record of:

• Representations made by public authorities;
• Reliance on those representations;
• Capital contributions;
• Project expenses;
• Compliance efforts;
• Regulatory applications;
• Objections to adverse measures;
• Steps taken to mitigate damage.

Interim Measures

An investment tribunal may have authority to recommend or order provisional measures under the applicable rules.

Possible measures may seek to:

• Preserve evidence;
• Protect the procedural integrity of arbitration;
• Prevent aggravation of the dispute;
• Preserve assets or rights;
• Protect confidential information.

A tribunal should not use interim measures to prevent a state from exercising every regulatory function. The requested measure must be connected with rights being adjudicated and must satisfy the applicable urgency and necessity standards.

Transparency and Confidentiality

Investment arbitration has a public dimension because it concerns state conduct and public resources.

Although commercially sensitive material may be protected, investment proceedings may be less confidential than private commercial arbitration.

The ICSID 2022 framework includes rules concerning publication, public access to certain documents and hearings, subject to consent, redaction and protection of confidential information. The applicable transparency regime depends on the procedural rules, treaty and party agreements.

Investors should prepare for the possibility that:

• The existence of the case may become public;
• Certain decisions or awards may be published;
• Hearings may include public access;
• Confidential business information may require specific protection.

ICSID Awards and Post-Award Remedies

An ICSID award is binding on the parties and is not subject to an ordinary appeal or review by the national courts at the seat.

The ICSID Convention provides limited post-award remedies, including:

• Supplementary decision;
• Rectification;
• Interpretation;
• Revision;
• Annulment.

Article 52 establishes exclusive annulment grounds, including improper constitution of the tribunal, manifest excess of powers, corruption, serious departure from a fundamental procedural rule and failure to state reasons. Annulment is an exceptional remedy and is not a rehearing of the merits.

Enforcement of ICSID Awards

Articles 53 and 54 of the ICSID Convention establish a distinctive enforcement system.

Each ICSID contracting state must recognise an ICSID award as binding and enforce its pecuniary obligations as if the award were a final judgment of its own courts. A party seeking enforcement generally provides a certified copy of the award to the competent court or authority designated by the member state.

The enforcement obligation does not eliminate rules concerning sovereign immunity from execution.

There is an important distinction between:

• Recognising an award as binding; and
• Seizing particular state assets.

Certain assets used for diplomatic, military, central banking or sovereign public purposes may benefit from immunity. Commercially used state assets may be assessed differently under the law of the enforcement jurisdiction.

Enforcement of Non-ICSID Investment Awards

An investment award rendered under the UNCITRAL Rules or another non-ICSID procedure is generally linked to a legal seat of arbitration.

Such awards may be:

• Challenged before the competent courts of the seat;
• Recognised and enforced under the New York Convention;
• Refused enforcement on the Convention’s limited grounds.

Unlike an ICSID award, a non-ICSID award may therefore be subject to national setting-aside proceedings at the seat.

Protecting a Foreign Investment before a Dispute

Foreign investors should consider treaty protection at the investment-planning stage.

Important measures include:

Treaty due diligence

The investor should identify the applicable BIT or multilateral treaty and review its definitions, protections and dispute settlement provisions.

Corporate structuring

The investment structure should be established for genuine commercial reasons before a dispute becomes foreseeable. Late restructuring designed solely to manufacture treaty jurisdiction may be challenged.

Contract drafting

Investment and concession agreements should address:

• Governing law;
• Arbitration;
• Stabilisation;
• Change in law;
• Compensation;
• Termination;
• Force majeure;
• Sovereign acts;
• Waiver and dispute escalation.

Regulatory compliance

The investor should comply with licensing, tax, environmental, competition, employment and reporting requirements.

Record keeping

The investor should preserve evidence of assurances, approvals, capital expenditure and regulatory communications.

Dispute escalation strategy

Potential treaty issues should be reviewed before filing domestic litigation or accepting amendments, waivers or settlements that may affect arbitration rights.

Frequently Asked Questions

Can every foreign investor sue Türkiye in international arbitration?

No. The investor must identify valid consent through a treaty, investment contract or another legally sufficient instrument and must satisfy the applicable jurisdictional conditions.

Does Law No. 4875 automatically permit every investor to commence arbitration?

No. The law recognises arbitration where applicable conditions are fulfilled and the parties have agreed. A separate and valid legal basis for consent must be identified.

Is Türkiye a member of ICSID?

Yes. Türkiye signed the ICSID Convention in 1987 and ratified it in 1989.

Does ICSID membership itself create consent?

No. ICSID membership provides access to the system but does not constitute consent to arbitrate every dispute.

What protections may be available under a Turkish BIT?

Depending on the treaty, protections may include fair and equitable treatment, full protection and security, national treatment, most-favoured-nation treatment, protection against expropriation and free transfer of funds.

Can regulatory change create an investment claim?

Potentially, but regulatory change alone is not necessarily a treaty breach. The investor must establish violation of a specific treaty obligation.

Can an investor use both Turkish courts and treaty arbitration?

The answer depends on the treaty. Cooling-off, fork-in-the-road, waiver or local-remedy provisions may restrict parallel proceedings.

Can a contract breach also be a treaty breach?

Possibly, but not every contractual breach violates international law. The treaty wording and nature of state conduct must be examined.

Are ICSID awards appealable before Turkish courts?

No. ICSID awards are subject only to the post-award remedies established by the ICSID Convention.

Can state assets be seized after an investment award?

Enforcement may be subject to sovereign immunity. Recognition of an award does not mean that every state asset can be attached.

Conclusion

Investment arbitration and foreign investors in Turkey are governed by a combination of domestic legislation, bilateral investment treaties, multilateral treaties, investment contracts and international arbitration rules.

Foreign Direct Investment Law No. 4875 establishes principles including freedom to invest, equal treatment, protection against uncompensated expropriation, transfer of investment proceeds and access to agreed dispute settlement mechanisms. However, the law does not automatically provide unconditional arbitration consent for every foreign investment dispute.

The most important preliminary issue is identifying the applicable legal instrument.

A foreign investor must establish:

• Protected nationality;
• A qualifying investment;
• Valid state consent;
• Temporal jurisdiction;
• Compliance with procedural conditions;
• Lawful establishment of the investment;
• A breach of a substantive protection;
• Causation and recoverable loss.

Türkiye has an extensive BIT network and is a contracting state to the ICSID Convention. It is also a contracting party to the Energy Charter Treaty, although the international energy treaty framework has undergone significant modernisation and withdrawal-related changes that require current, case-specific analysis.

Investment arbitration should not be treated as a substitute for every administrative, contractual or commercial remedy. A regulatory decision, contractual breach or commercial loss does not automatically amount to an international law violation.

Foreign investors can reduce risk through early treaty due diligence, lawful corporate structuring, careful investment contract drafting, regulatory compliance and preservation of contemporaneous evidence.

When a dispute begins to emerge, legal advice should be obtained before commencing domestic litigation, restructuring the investment, accepting a settlement or issuing formal notices. Those steps may affect jurisdiction and the investor’s ability to pursue international arbitration.

For foreign investors, project companies and multinational businesses operating in Türkiye, a coordinated strategy involving Turkish regulatory law, public law, international investment law, valuation and enforcement may significantly improve the protection of the investment and the effective resolution of disputes.