Business law in Turkey is not a single statute but an integrated system of commercial, civil, labor, tax, administrative, and sector-specific regulatory frameworks that collectively govern how companies are formed, how contracts are made and enforced, how employment relationships are managed, how taxes are assessed and collected, and how disputes are resolved. The primary statutory foundations are: the Turkish Commercial Code (Türk Ticaret Kanunu, TTK, Law No. 6102), which governs corporate entities, commercial transactions, negotiable instruments, and commercial agents; the Turkish Code of Obligations (Türk Borçlar Kanunu, TBK, Law No. 6098), which governs contract formation, performance, breach, and the general principles of civil liability; the Labor Code (İş Kanunu, Law No. 4857) and the Social Security and General Health Insurance Law (Law No. 5510), which govern employment relationships and social security contributions; the Tax Procedure Law (Vergi Usul Kanunu, VUK, Law No. 213) and the specific tax laws governing corporate income tax, VAT, and other levies; and the Civil Procedure Law (Hukuk Muhakemeleri Kanunu, HMK, Law No. 6100) and the Enforcement and Bankruptcy Law (İcra ve İflas Kanunu, İİK, Law No. 2004), which govern dispute resolution and debt enforcement. Layered over these general frameworks are sector-specific regulatory regimes — BDDK for banking and financial services, SPK for capital markets, EPDK for energy, BTK for telecommunications, RTÜK for broadcasting, and the Competition Authority (Rekabet Kurumu) for competition law — each with their own licensing, compliance, and enforcement mechanisms. This guide explains the key areas of Turkish business law that every company operating in Turkey must understand. Practice may vary by authority and year — verify current statutory requirements directly before relying on any information in this guide.
The TTK commercial law framework — the foundation of Turkish business law
A lawyer in Turkey advising on the Turkish Commercial Code framework must explain that the TTK is the primary source of Turkish business law for commercial entities — governing not only the creation and internal governance of companies but also the specific rules applicable to commercial transactions that distinguish them from ordinary civil transactions between non-merchants. The TTK's commercial entity provisions (Articles 124-644 for capital companies) establish the mandatory governance structure for anonim şirket (AŞ) and limited şirketi (Ltd. Şti.) — including the board of directors (yönetim kurulu) and general assembly (genel kurul) requirements for AŞ, the manager (müdür) and shareholders' assembly requirements for Ltd. Şti., the mandatory commercial bookkeeping obligations (Article 64), the annual financial statement preparation and disclosure obligations, and the specific corporate finance provisions governing capital increases, reductions, and distributions. The TTK also governs commercial agents (acenteler) under Articles 102-123, commercial representatives (ticari temsilciler), negotiable instruments (kambiyo senetleri) including bills of exchange and promissory notes, and maritime commercial law. Practice may vary by authority and year — verify current TTK mandatory provision standards and the specific corporate governance requirements applicable to the entity type before any TTK-related legal assessment or advisory.
An Istanbul Law Firm advising on commercial practice standards under TTK must explain that the TTK's commercial practice framework creates specific rules for merchants (tacirler) that differ materially from the rules applicable to non-merchants under TBK. The most significant commercial practice distinctions include: the tacir solidarity presumption (tacirler arasında müteselsil borçluluk) under TTK Article 7, which creates joint and several liability among co-debtors in commercial transactions without requiring a specific agreement; the commercial interest (ticari faiz) rate that applies to overdue obligations between merchants, which operates differently from the civil default interest applicable to non-commercial transactions; the commercial custom (ticari örf ve adet) that supplements TTK provisions in the absence of specific rules; the commercial lien (ticari hapis hakkı) under TTK Article 96-99 that gives merchants a right of retention over goods in their possession belonging to the debtor; and the specific commercial books (ticari defterler) obligations under TTK Article 64-88, which require merchants to maintain specified accounting records in prescribed formats as evidence of commercial transactions. A commercial dispute in Turkey is litigated before the commercial court of first instance (asliye ticaret mahkemesi) rather than the general civil court, with specific procedural characteristics including the mandatory appointment of bilirkişi (court experts) for technical matters. Practice may vary — verify current Turkish commercial court practice standards and the specific commercial law provisions applicable to the transaction type before any commercial law advisory. Practice may vary — check current guidance before acting on any information on this page.
An English speaking lawyer in Turkey advising on mandatory commercial mediation must explain that since 2018, Turkish commercial law includes a mandatory commercial mediation requirement (zorunlu ticari arabuluculuk) — under the Mediation Law (Law No. 6325) as amended — that makes commercial mediation a mandatory condition precedent to filing certain types of commercial lawsuits. Specifically, commercial disputes about monetary claims arising from commercial transactions must first go through a mandatory mediation phase administered by a certified mediator before the claimant can file a lawsuit in the commercial court. The mandatory mediation process typically lasts 3 weeks (extendable by agreement), is conducted by a registered mediator, and if unsuccessful, results in a non-settlement record (anlaşamama tutanağı) that the claimant must attach to the subsequent court filing as proof that mediation was attempted. A commercial lawsuit filed without first completing the mandatory mediation phase is dismissed procedurally. For commercial disputes about non-monetary matters and certain other excluded categories, mediation is not mandatory but remains available as a voluntary option. Practice may vary — verify current mandatory commercial mediation scope and the specific commercial dispute categories subject to mandatory mediation before any commercial dispute management strategy. The commercial litigation framework is analyzed in the resource on commercial litigation in Turkey.
Contract law under TBK — formation, enforcement, and breach remedies
A Turkish Law Firm advising on Turkish contract law must explain that the Turkish Code of Obligations (TBK, Law No. 6098) provides the general framework for contract formation and enforcement in Turkey — governing all contractual relationships between private parties, including commercial transactions that are also subject to the TTK's commercial law overlays. The TBK's contract formation requirements follow civil law principles: a contract is formed when a valid offer and a corresponding acceptance meeting the offer's terms are exchanged between parties with legal capacity, and the contract's subject matter must be possible, lawful, and determinate or determinable. The TBK departs significantly from common law contract doctrine in several areas: there is no requirement for "consideration" — Turkish contracts can be binding without exchange of value (as in gratuitous contracts under TBK Articles 285-340); the doctrine of error (hata) under TBK Article 30-35 allows avoidance of contracts formed under fundamental mistake, including mistakes about facts that the mistaken party would not have contracted without knowing; and the hardship doctrine (aşırı ifa güçlüğü) under TBK Article 138 allows courts to modify or dissolve contracts where changed circumstances have made performance excessively burdensome relative to the original allocation of risk. Practice may vary by authority and year — verify current TBK contract formation and enforcement standards applicable to the specific contract type before any contract design or dispute analysis.
An Istanbul Law Firm advising on specific contract types under TBK must explain that TBK governs specific named contract types (isimli sözleşmeler) with their own mandatory provisions — and parties cannot contract out of these mandatory provisions regardless of what the contract document says. The most commercially significant named contracts include: sales contracts (satış sözleşmesi, TBK Articles 207-281) with mandatory warranty provisions for defects (ayıp ihbarı obligations requiring defect notification within specific periods); lease contracts (kira sözleşmesi, TBK Articles 299-340) with mandatory tenant protection provisions that significantly limit landlord termination rights; mandate and agency contracts (vekalet sözleşmesi, TBK Articles 502-529); and employment contracts (hizmet sözleşmesi, TBK Articles 393-447) that interact with the mandatory provisions of the specialized Labor Code (İş Kanunu). The interaction between the TBK's general contract provisions and the specific mandatory rules in each named contract type creates a layered compliance requirement — a commercial lease, for example, must comply with both the TBK's general contract formation requirements and the specific mandatory tenant protection provisions of TBK Articles 299-340, neither of which can be waived by the parties. Practice may vary — verify current TBK mandatory provisions applicable to the specific contract type and the specific defect notification periods and procedures before any contract design or breach response. Practice may vary — check current guidance before acting on any information on this page.
A lawyer in Turkey advising on breach of contract remedies under TBK must explain that the Turkish remedial framework for breach of contract differs from common law in ways that significantly affect the commercial value of contractual breach claims. The primary breach remedies under TBK include: specific performance (aynen ifa) — requiring the breaching party to perform the contractual obligation as agreed, which is the default remedy in Turkish law rather than damages alone; reduction of the price (bedelden indirim) — available as an alternative to specific performance or alongside damages; damages (tazminat) for losses caused by the breach, calculated based on the actual loss (müspet zarar — positive damages including lost profits) or the reliance interest (menfi zarar — negative damages for costs incurred in reliance on the contract); and termination (dönme veya fesih) where the breach is fundamental or where the performance obligation has become permanently impossible. Interest on monetary obligations accrues at the applicable legal rate from the date of default — and for commercial obligations between merchants, the commercial interest rate applies. The specific conditions and procedures for exercising each remedy, including applicable notice periods, grace periods, and procedural deadlines, must be complied with precisely to preserve the remedy. Practice may vary — verify current TBK breach remedy conditions and the specific notice requirements applicable to the specific contract type before any breach response or claim strategy.
Competition law — the Turkish framework under Law No. 4054
An English speaking lawyer in Turkey advising on Turkish competition law must explain that the Law on the Protection of Competition (Rekabet Kanunu, Law No. 4054) and its implementing regulations — administered by the Competition Authority (Rekabet Kurumu) — create a competition law framework structurally similar to EU competition law (Articles 101-102 TFEU) but with specific Turkish implementation characteristics that require direct compliance analysis rather than reliance on EU precedent. The three primary prohibitions are: Article 4 (equivalent to TFEU Article 101) — prohibiting agreements between undertakings, decisions by associations of undertakings, and concerted practices that have as their object or effect the restriction of competition in Turkey; Article 6 (equivalent to TFEU Article 102) — prohibiting the abuse of a dominant position in Turkey; and Article 7 (equivalent to the EU Merger Regulation) — prohibiting mergers and acquisitions that significantly impede effective competition in Turkey. The Competition Authority has active enforcement authority and has imposed significant fines — the maximum fine for Article 4 and 6 violations is 10% of the Turkish annual turnover of each undertaking involved in the violation, and fines in significant cartel cases have reached hundreds of millions of TRY. Practice may vary by authority and year — verify current Rekabet Kurumu enforcement standards and the specific competition exemption criteria applicable to the planned commercial activity before any competition law compliance assessment.
A Turkish Law Firm advising on competition compliance for commercial agreements must explain that the Article 4 prohibition applies to a wide range of commercial agreement types that businesses routinely enter — including horizontal agreements between competitors (price-fixing, market sharing, bid-rigging, output limitation) and vertical agreements between companies at different levels of the supply chain (distribution agreements, agency agreements, franchise agreements). While certain categories of vertical agreements benefit from a block exemption under the Communiqué on Vertical Agreements (Dikey Anlaşmalara İlişkin Tebliğ, No. 2002/2), the block exemption is not available if the supplier's market share exceeds 30% or if the agreement contains hardcore restrictions — such as resale price maintenance (fixing minimum resale prices), absolute territorial exclusivity preventing passive sales, or restrictions on cross-supplies within selective distribution systems. The Turkish Competition Authority has been particularly active in enforcement against: retail sector price coordination; information exchange among competitors in concentrated markets; and online platform exclusivity arrangements that exclude competing suppliers. Practice may vary — verify current Turkish competition law block exemption conditions and the specific enforcement priorities of the Rekabet Kurumu before any distribution agreement or commercial cooperation design.
An Istanbul Law Firm advising on AML and MASAK compliance must explain that the anti-money laundering framework in Turkey — administered by the Financial Crimes Investigation Board (Mali Suçları Araştırma Kurulu, MASAK) under the Anti-Money Laundering Law (Law No. 5549) — creates compliance obligations for a broad range of businesses beyond the financial sector. Obliged parties under Law No. 5549 include: banks and financial institutions; money transfer and currency exchange businesses; notaries, lawyers, and accountants when providing specific services (including company formation, real estate transactions, and trust-related services); real estate agents; precious metals dealers; and gaming and betting establishments. Obliged party obligations include: customer identification and know-your-customer (KYC) procedures; beneficial ownership identification for corporate clients; suspicious transaction reporting (STR) to MASAK within 2 business days of detection; record keeping for 8 years; and the appointment of a designated AML compliance officer for larger obliged parties. Violations of MASAK obligations create significant administrative fines and in serious cases, criminal liability under TCK Article 282 (aklama — money laundering). Practice may vary — verify current MASAK obliged party scope and the specific KYC documentation requirements applicable to the specific business type before any AML compliance program design. Practice may vary — check current guidance before acting on any information on this page.
Labor law — the İş Kanunu framework for employment relationships
A lawyer in Turkey advising on Turkish labor law must explain that the Labor Code (İş Kanunu, Law No. 4857) creates a comprehensive mandatory employment protection framework that substantially limits the parties' freedom to contract in employment relationships — and the mandatory provisions of the Labor Code apply to all qualifying employment relationships regardless of what the employment contract says. The most practically significant mandatory provisions include: the minimum notice periods (ihbar süreleri) that scale from 2 to 8 weeks depending on tenure; the mandatory severance pay (kıdem tazminatı) entitlement of one month's gross salary per year of service (capped at a statutory ceiling) for employees who are terminated without just cause or who resign for statutory qualifying reasons; the annual paid leave entitlement (yıllık ücretli izin) of at least 14 days per year (increasing with tenure); the maximum regular working hours of 45 hours per week with overtime rate protections; the mandatory rest periods; and the specific requirements for termination for behavioral grounds — requiring a written termination notice with specific grounds and a 5-working-day advance notice to the employee to present their defense. Practice may vary by authority and year — verify current Labor Code mandatory provision standards applicable to the specific employment category and the specific termination ground before any termination decision.
An Istanbul Law Firm advising on mandatory labor mediation must explain that the 2018 amendment to the Labor Code (Law No. 4857) and the Mediation Law (Law No. 6325) introduced mandatory mediation as a condition precedent to filing labor court claims for monetary labor claims — similar to the mandatory commercial mediation requirement but specifically for employment disputes. Labor claims that are subject to mandatory mediation include: severance pay (kıdem tazminatı) claims; notice pay (ihbar tazminatı) claims; unused annual leave pay (yıllık izin ücreti) claims; overtime pay (fazla mesai ücreti) claims; and other claims for monetary compensation arising from the employment relationship. Before filing a labor lawsuit for these monetary claims, the employee must file an application with a certified mediator and participate in the mediation process. If mediation fails (or if the respondent fails to appear), the mediator issues a non-settlement record that the employee must attach to the subsequent labor court filing. Labor court claims filed without the mandatory mediation record are dismissed procedurally. Importantly, mandatory mediation does not apply to reinstatement claims (işe iade davası) — those can be filed directly in the labor court within one month of the termination. Practice may vary — verify current mandatory labor mediation scope and procedures before any labor dispute management strategy.
An English speaking lawyer in Turkey advising on collective bargaining and union law must explain that Turkish collective labor law — governed by the Trade Unions and Collective Labor Agreements Law (Law No. 6356) — creates specific legal obligations for employers in workplaces where unionization has occurred and collective bargaining rights have been established. A trade union acquires the right to represent workers for collective bargaining when it has membership of at least 1% of workers in the relevant sector (yetkili sendika) and at least 40% of workers at the specific workplace — and once this threshold is met, the employer must engage in collective bargaining (toplu iş sözleşmesi müzakereleri) with the authorized union. The collective bargaining agreement (toplu iş sözleşmesi, TİS) that results from successful negotiations is binding on all workers at the covered workplace — including non-union members — and sets minimum employment conditions (wages, working hours, benefits, and social rights) that individual employment contracts cannot fall below. An employer's refusal to engage in collective bargaining with an authorized union is an unfair labor practice (sendika karşıtı eylem) subject to sanctions under Law No. 6356. Practice may vary — verify current trade union authorization procedures and collective bargaining obligations applicable to the specific workplace and sector before any union relations strategy. Practice may vary — check current guidance before acting on any information on this page.
Tax law framework — corporate income tax, KDV, and withholding obligations
A Turkish Law Firm advising on the Turkish corporate tax framework must explain that Turkish tax law for commercial entities consists of three primary tax obligations: corporate income tax (kurumlar vergisi) under Law No. 5520; value added tax (katma değer vergisi, KDV) under Law No. 3065; and withholding tax (tevkifat) obligations on specified payments, administered through the Tax Procedure Law (VUK, Law No. 213). The standard corporate income tax rate is currently 25% for most commercial entities (verify current rate — the rate has changed multiple times in recent years through legislative amendments). Corporate income tax is self-assessed through quarterly provisional advance payments (geçici vergi) at 25% of the period's taxable income, with an annual reconciliation through the annual corporate income tax return (kurumlar vergisi beyannamesi) due by the end of the fourth month following the fiscal year end. Turkish companies are subject to corporate income tax on their worldwide income, with a foreign tax credit mechanism (yurt dışında ödenen vergilerin mahsubu) for taxes paid abroad on foreign-source income. Practice may vary by authority and year — verify current corporate income tax rates and payment deadlines and the specific exempt income categories applicable to the company's business activities before any Turkish corporate tax planning.
An Istanbul Law Firm advising on KDV (Turkish VAT) compliance must explain that the Turkish VAT system is structured similarly to the EU VAT system but with specific Turkish characteristics that create compliance challenges for foreign-owned companies and international transactions. The standard KDV rate is currently 20% for most goods and services (with reduced rates of 10% for certain food items and basic goods, and 1% for specific essential items and certain real estate transactions). Turkish KDV operates on an input-output credit mechanism — companies collect output KDV from their customers on taxable sales and can credit input KDV paid on their purchases, with the net balance either payable to the tax authority or creditable against future KDV obligations. For cross-border services, the reverse charge mechanism (sorumlu sıfatıyla KDV) requires the Turkish recipient to self-assess and pay KDV on services imported from abroad — a particularly important compliance point for Turkish companies purchasing digital services, cloud computing, and professional services from foreign providers. Turkish companies providing services abroad can claim KDV exemption for exported services where the service is exclusively utilized outside Turkey. Practice may vary — verify current KDV rates, exemption conditions, and the specific place of supply rules applicable to the company's international transactions before any KDV compliance program design.
A lawyer in Turkey advising on transfer pricing compliance must explain that Turkish transfer pricing rules — under Corporate Income Tax Law Article 13 and the General Communiqué on Disguised Profit Distribution through Transfer Pricing (Seri No. 1) — require that transactions between related parties be conducted at arm's length prices, and that companies document their transfer pricing positions to demonstrate that intercompany prices meet the arm's length standard. Turkish transfer pricing documentation requirements include: an annual master file describing the group's business, organizational structure, and global transfer pricing policies; a local file specifically describing Turkish intercompany transactions and the methodology used to set arm's length prices; and country-by-country reporting for qualifying large multinational groups. The Revenue Administration actively audits transfer pricing positions — particularly in sectors with large intercompany transactions such as financial services, manufacturing, and technology — and transfer pricing adjustments can trigger both additional tax assessments and tax penalties. Companies with significant intercompany transactions (related-party loans, management service fees, royalties, and goods and services sales) should maintain contemporaneous transfer pricing documentation before the transactions occur, not after an audit begins. Practice may vary — verify current transfer pricing documentation requirements and the specific arm's length methods acceptable to the Turkish Revenue Administration before any intercompany pricing structure is designed. Practice may vary — check current guidance before acting on any information on this page.
Commercial dispute resolution — courts, arbitration, and enforcement
An English speaking lawyer in Turkey advising on the Turkish commercial court system must explain that commercial disputes in Turkey are litigated before specialized commercial courts (asliye ticaret mahkemesi) in provinces where they exist — and before the general civil courts with commercial chambers in provinces where there is no dedicated commercial court. The Turkish commercial litigation process under the HMK is a written-pleading-based civil law system with the following distinct characteristics from common law litigation: the claimant must submit all evidence in the initial petition (dava dilekçesi) and the defendant must submit all evidence in the response (cevap dilekçesi) — late-filed evidence may be excluded unless the party demonstrates inability to submit earlier; there is no discovery process equivalent to US-style pre-trial discovery, though courts can order evidence production and witnesses can be examined; the court appoints bilirkişi (court experts) for technical matters including accounting, financial, engineering, and construction disputes, and the bilirkişi report significantly influences the court's decision on technical facts; and the appeals process through the Bölge Adliye Mahkemesi (Regional Court of Appeals) and Yargıtay (Court of Cassation) creates potential timelines of 4-6 years for complex contested commercial disputes. Practice may vary by authority and year — verify current HMK commercial litigation procedural requirements and the specific evidence format expectations at the relevant court before any commercial dispute strategy.
A Turkish Law Firm advising on arbitration as a dispute resolution mechanism must explain that Turkish law provides three primary arbitration frameworks for commercial disputes: domestic arbitration under HMK Articles 407-444 for domestic disputes without international elements; international arbitration under the International Arbitration Law (Law No. 4686) for disputes with an international element (involving parties from different countries, performance in multiple countries, or other international connections); and international institutional arbitration under the rules of international arbitration bodies (ICC, LCIA, ISTAC, or others) with a foreign or Turkish seat. Turkey is a signatory to the New York Convention on the Recognition and Enforcement of Foreign Arbitral Awards, meaning that international arbitral awards can be enforced in Turkey through the recognition and enforcement (tenfiz) procedure — and Turkish arbitral awards can be enforced in the 168+ other New York Convention signatory states. The Istanbul Arbitration Centre (ISTAC — İstanbul Tahkim Merkezi), established in 2015, has developed a track record for complex commercial disputes and provides Turkish-law-familiar administration while supporting international parties. Practice may vary — verify current Law No. 4686 arbitration requirements and ISTAC procedural rules before any arbitration clause design or arbitration proceeding initiation. The asset enforcement framework is analyzed in the resource on asset freezing orders in Turkey.
An Istanbul Law Firm advising on judgment and award enforcement must explain that obtaining a favorable judgment or arbitral award is only the first step in a successful dispute resolution — enforcement against the debtor's assets requires separate proceedings through the enforcement offices (icra müdürlükleri) under the İİK, and understanding the enforcement process is essential for realistic dispute resolution planning. For domestic Turkish court judgments, enforcement is initiated by filing an execution request (icra takibi) with the competent enforcement office, which issues a payment notice (ödeme emri) to the debtor. If the debtor does not pay or object within the applicable period, the creditor can apply for seizure and liquidation of the debtor's assets — including bank account attachment (banka haczi), real estate annotation (tapu müdürlüğüne haciz bildirimi), and vehicle seizure. For foreign court judgments and foreign arbitral awards, enforcement in Turkey requires a formal recognition and enforcement application (tenfiz davası) before the Turkish civil courts — establishing that the foreign judgment or award meets the requirements of MÖHUK Articles 50-59 (for foreign court judgments) or the New York Convention (for arbitral awards). Practice may vary — verify current enforcement office procedural requirements and the specific tenfiz application requirements applicable to the foreign jurisdiction and judgment type before any enforcement strategy. Practice may vary — check current guidance before acting on any information on this page.
Digital commerce, technology, and data protection in Turkish business law
A Turkish Law Firm advising on the digital commerce regulatory framework must explain that Turkish businesses operating in the digital economy face a specific regulatory landscape that combines the general business law framework with specific digital-economy statutes — and the regulatory environment has evolved rapidly since 2020 with several significant legislative updates that affect platform operators, e-commerce businesses, and digital service providers. The Electronic Commerce Law (Law No. 6563) establishes mandatory obligations for e-commerce service providers (hizmet sağlayıcılar) and e-commerce intermediary service providers (aracı hizmet sağlayıcılar — marketplaces and platforms) — including mandatory pre-contract disclosure requirements, consumer withdrawal rights, electronic contract formation rules, and specific transparency and reporting obligations for large platforms. The Law No. 5651 on Internet Regulation creates specific obligations for hosting providers (hosting hizmet sağlayıcıları) and large social network providers (sosyal ağ sağlayıcıları) with more than 1 million Turkish daily active users — including content removal obligations, Turkish data localization requirements, Turkish representative appointment, and BTK reporting obligations. Practice may vary by authority and year — verify current Law No. 6563 and Law No. 5651 compliance requirements applicable to the specific digital business model before any digital commerce legal compliance assessment.
An Istanbul Law Firm advising on KVKK data protection compliance must explain that the Personal Data Protection Law (KVKK, Law No. 6698) creates data protection compliance obligations for all businesses operating in Turkey that process personal data of Turkish residents — and these obligations apply regardless of the company's ownership nationality or the location of its servers. The KVKK's key compliance obligations for commercial entities include: VERBIS (Veri Sorumluları Sicil Bilgi Sistemi) data controller registry registration for entities above the applicable threshold (companies with more than 10 employees and whose primary commercial activity involves personal data processing); preparation of Records of Processing Activities documenting all personal data categories, purposes, legal bases, and retention periods; implementation of KVKK-compliant privacy notices at all data collection touchpoints (websites, applications, employment, and customer relationships); establishment of data subject rights response procedures; implementation of technical and organizational security measures; data processing agreements with all third-party processors; and in specific cases, cross-border data transfer mechanisms for transferring Turkish personal data abroad. The KVKK Board (Kişisel Verileri Koruma Kurulu) has administrative fine authority of up to 1% of annual Turkish turnover for KVKK violations. Practice may vary — verify current KVKK Board guidance and the specific VERBIS registration threshold applicable to the company before any data protection compliance program design. The data protection framework is analyzed in the resource on personal data protection law in Turkey.
A lawyer in Turkey advising on fintech and digital financial services regulation must explain that digital financial services in Turkey — including payment services, electronic money issuance, digital lending, and investment fintech — are subject to specific licensing and regulatory oversight by the Banking Regulation and Supervision Agency (BDDK) under the Payment and Securities Settlement Systems, Payment Services and Electronic Money Institutions Law (Law No. 6493) and related regulations. A company that wants to provide payment services, issue electronic money, or operate a payment system in Turkey must obtain a specific BDDK license before commencing operations — and operating payment services without a BDDK license is a serious regulatory violation subject to significant administrative sanctions and criminal liability for the company's officers. The Law No. 6493 framework distinguishes between: payment service providers (ödeme hizmeti sağlayıcıları); electronic money institutions (elektronik para kuruluşları); and payment system operators (ödeme sistemi işleticileri) — each with different capital requirements, technical infrastructure requirements, and ongoing reporting obligations. The fintech licensing process is detailed and requires significant capital and operational infrastructure — typically taking 6-12 months from initial application to license grant. Practice may vary — verify current BDDK fintech licensing requirements and the specific capital and infrastructure standards applicable to the planned digital financial service before any fintech business model design in Turkey. Practice may vary — check current guidance before acting on any information on this page.
Foreign investment legal framework and market entry strategy
An English speaking lawyer in Turkey advising on the foreign investment legal framework must explain that Turkey's foreign investment legal environment is defined by three foundational elements: the Foreign Direct Investment Law (Law No. 4875), which establishes the equal treatment principle for foreign investors and the free capital repatriation guarantee; Turkey's network of bilateral investment treaties (BİT — ikili yatırım anlaşmaları) with more than 90 countries, which provide additional protections including fair and equitable treatment, most-favored-nation treatment, protection against expropriation without adequate compensation, and investor-state dispute settlement through international arbitration; and Turkey's double taxation treaty network with more than 80 countries, which affects the tax cost of cross-border investment flows. The combination of domestic equal treatment guarantees and bilateral treaty protections makes Turkey's foreign investment legal environment generally stable for qualifying investments — though sector-specific restrictions (broadcasting, aviation, maritime cabotage) and the specific regulatory requirements for financial services, energy, and telecommunications create additional compliance requirements that must be assessed before investment structures are finalized. Practice may vary by authority and year — verify current bilateral investment treaty provisions applicable to the specific investor's nationality and the specific investment protection standards before any investment structure design.
A Turkish Law Firm advising on investment zone and incentive structures must explain that Turkey's strategic geographic position — straddling Europe and Asia, serving as a logistics hub for MENA and Black Sea markets, and providing access to the EU Customs Union through Turkey's customs union membership — has driven significant investment incentive programs designed to attract foreign capital to priority sectors and geographic regions. The Investment Incentive System (Yatırım Teşvik Sistemi), administered by the Ministry of Industry and Trade, provides differentiated benefits across six regional zones (1 through 6, with Zone 1 covering Istanbul and Zone 6 covering the most underdeveloped eastern provinces) — including customs duty exemptions, VAT exemptions, corporate income tax reductions, SGK employer premium support, and in Zone 6, direct grant support. Strategic investments (stratejik yatırımlar) in import-substitution sectors, large-scale manufacturing, and technology industries receive the most generous incentive packages. Free zones (serbest bölgeler) provide additional advantages including corporate income tax exemptions on manufacturing income and customs-free trade for qualifying activities. Practice may vary — verify current investment incentive zone classifications and specific benefit packages applicable to the investment type and location before any investment incentive application strategy.
An Istanbul Law Firm advising on the Turkey-EU Customs Union's implications for business must explain that Turkey's Customs Union agreement with the EU (in effect since 1996) creates a specific trade law environment for industrial goods that is significantly advantageous for manufacturers and exporters operating in Turkey — providing tariff-free access to EU markets for qualifying Turkish industrial goods without requiring Turkey's full EU membership. Under the Customs Union: industrial goods originating in Turkey can be exported to EU member states without customs duties; Turkey applies the EU's Common External Tariff to imports from third countries; and Turkey has aligned its technical standards, product safety regulations, and intellectual property protection framework with EU standards in the covered sectors. For foreign investors, the Customs Union means that Turkey can function as an EU-access manufacturing and services base — goods produced in Turkey with sufficient Turkish origin content can enter EU markets on favorable terms that would not be available to goods produced in non-Customs Union countries. However, the Customs Union does not extend to agricultural goods, public procurement, or services — these sectors are governed by separate bilateral arrangements. Practice may vary — verify current Customs Union applicable goods categories and the specific rules of origin requirements for EU market access before any Turkey-based manufacturing or export strategy. Practice may vary — check current guidance before acting on any information on this page.
How we advise on Turkish business law across practice areas
A best lawyer in Turkey advising on Turkish business law explains that ER&GUN&ER's approach to business law mandates is organized around the principle that legal advice is most valuable when it is specific, timely, and actionable — not generic, delayed, or theoretical. For each new business law mandate, we begin with a rapid issue identification exercise: which specific Turkish law provisions apply to the specific situation, what the specific compliance obligations are, what the specific risks of non-compliance are, and what the specific remedial or preventive steps are available. We then provide advice in writing — distinguishing between what Turkish law requires (mandatory provisions that cannot be contracted around), what Turkish law permits (default rules that can be modified by agreement), and what Turkish law leaves to practice and business judgment. For foreign clients, we add a fourth dimension: we explain where Turkish law differs materially from the client's home jurisdiction in ways that would affect specific business decisions. This structure — specific, written, distinguishing mandatory from optional, and flagging cross-system differences — produces advice that clients can actually use in making decisions rather than general orientation about the legal landscape.
ER&GUN&ER advises Turkish and international businesses across the full spectrum of Turkish business law — TTK corporate governance and company formation; TBK commercial contract drafting, review, and dispute management; Law No. 4054 competition law compliance and Competition Authority representation; İş Kanunu employment contract design, termination management, and labor court representation; VUK tax compliance, transfer pricing, and Revenue Administration representation; HMK and İİK commercial litigation and enforcement; international and domestic arbitration under Law No. 4686; KVKK data protection compliance; Law No. 6563 e-commerce regulatory compliance; fintech licensing under Law No. 6493; Law No. 4875 foreign direct investment structuring; investment incentive applications; real estate and commercial lease transactions; construction contract drafting and dispute management; IP protection and enforcement at TÜRKPATENT and IP courts; mandatory commercial and labor mediation; and M&A transactions including Competition Authority notification under Law No. 4054. We work in English throughout all international mandates. For detailed coverage of corporate law specifically — see the resource on corporate legal services in Turkey. For foreign investor company formation — see the resource on foreigners establishing a business in Turkey. Practice may vary — check current guidance before acting on any information on this page.
Frequently Asked Questions
- What is the primary legal framework governing commercial entities in Turkey? The Turkish Commercial Code (TTK, Law No. 6102) governs commercial entity formation, governance, and commercial transactions. The Turkish Code of Obligations (TBK, Law No. 6098) governs contract formation, performance, and breach. The Labor Code (İş Kanunu, Law No. 4857) governs employment. The Tax Procedure Law (VUK, Law No. 213) and specific tax laws govern tax obligations. The Civil Procedure Law (HMK) and Enforcement and Bankruptcy Law (İİK) govern dispute resolution and enforcement. Sector-specific regulators (BDDK, SPK, EPDK, BTK) administer additional licensing frameworks. Practice may vary — verify current statutory requirements.
- What is mandatory commercial mediation in Turkey and when does it apply? Since 2018, certain commercial monetary claims must go through mandatory mediation (zorunlu ticari arabuluculuk) before a lawsuit can be filed in the commercial court. A commercial lawsuit filed without first completing mandatory mediation is dismissed procedurally. The process typically lasts 3 weeks and is conducted by a certified mediator. If mediation fails, the non-settlement record must be attached to the subsequent court filing. Practice may vary — verify current mandatory mediation scope applicable to the specific dispute type.
- What does Turkish competition law prohibit for businesses? Law No. 4054 prohibits three categories of conduct: anticompetitive agreements (Article 4 — equivalent to TFEU Article 101), covering both horizontal cartels and vertical agreements with anti-competitive effects; abuse of dominant position (Article 6 — equivalent to TFEU Article 102); and anti-competitive mergers and acquisitions (Article 7). The Competition Authority can impose fines up to 10% of annual Turkish turnover for violations. Practice may vary — verify current competition law enforcement standards and applicable block exemptions.
- What are the mandatory employee rights under Turkish labor law? The İş Kanunu's mandatory provisions include: notice periods of 2-8 weeks depending on tenure; severance pay (kıdem tazminatı) of one month per year of service for qualifying terminations; annual paid leave of at least 14 days increasing with tenure; maximum 45 hours regular weekly work; and the 5-working-day employee defense right before behavioral-grounds termination. These provisions apply regardless of contrary contractual terms. Practice may vary — verify current mandatory employment standards.
- What is mandatory labor mediation in Turkey? Since 2018, labor claims for monetary compensation (severance pay, notice pay, unused leave, overtime pay) must go through mandatory mediation before a labor lawsuit can be filed. The process follows the same structure as commercial mandatory mediation. Reinstatement claims (işe iade davası) are not subject to mandatory mediation and can be filed directly within one month of termination. Practice may vary — verify current mandatory labor mediation scope.
- What Turkish corporate tax rate and VAT rate apply to commercial entities? The standard corporate income tax (kurumlar vergisi) rate is currently 25% of taxable income (verify current rate — it has changed in recent years). The standard KDV (VAT) rate is 20% for most goods and services, with 10% and 1% reduced rates for specific categories. Monthly KDV returns and quarterly provisional corporate income tax advances are required. Practice may vary — verify current rates as they are subject to legislative amendment.
- What are the Turkish transfer pricing documentation requirements? Turkish transfer pricing rules require arm's length pricing for intercompany transactions and contemporaneous documentation — including a master file describing the group's global transfer pricing approach and a local file documenting Turkish intercompany transactions. Country-by-country reporting applies to qualifying large multinational groups. The Revenue Administration actively audits transfer pricing in financial services, manufacturing, and technology sectors. Documentation should be prepared before transactions occur, not after an audit begins. Practice may vary — verify current documentation requirements.
- Is Turkey's commercial arbitration award enforceable internationally? Yes — Turkey is a signatory to the New York Convention on the Recognition and Enforcement of Foreign Arbitral Awards, meaning Turkish arbitral awards can be enforced in the 168+ other signatory states through recognition proceedings. Conversely, foreign arbitral awards from New York Convention signatory states can be recognized and enforced in Turkey through the tenfiz procedure. International commercial arbitration under ICC, LCIA, or ISTAC rules with a Turkish or foreign seat are all recognized and enforceable. Practice may vary — verify current recognition requirements in the specific enforcement jurisdiction.
- What KVKK compliance obligations apply to all commercial entities in Turkey? KVKK (Law No. 6698) requires all entities processing personal data of Turkish residents to: implement compliant privacy notices; establish data subject rights procedures; implement security measures; enter data processing agreements with processors; and for eligible entities, register in VERBIS. The KVKK Board can impose fines up to 1% of annual Turkish turnover. Compliance obligations apply from the first data collection regardless of company size. Practice may vary — verify current KVKK Board guidance.
- What licenses are required for digital financial services in Turkey? Payment services, electronic money issuance, and payment system operation require specific BDDK licensing under Law No. 6493. Operating payment services without a BDDK license is a serious regulatory violation. The licensing process is detailed and typically takes 6-12 months. Capital, infrastructure, and technical standards requirements apply. Fintech businesses must assess their licensing requirements before commencing operations, not after launch. Practice may vary — verify current BDDK fintech licensing requirements.
- What e-commerce compliance obligations apply to digital businesses in Turkey? Law No. 6563 requires e-commerce service providers and marketplace operators to provide mandatory pre-contract disclosures, consumer withdrawal rights, and electronic contract formation compliance. Law No. 5651 creates specific content removal, data localization, Turkish representative appointment, and BTK reporting obligations for large platforms exceeding 1 million Turkish daily active users. All digital businesses collecting Turkish user data must comply with KVKK. Practice may vary — verify current digital commerce regulatory requirements.
- What does the Turkey-EU Customs Union mean for businesses? The Customs Union (in effect since 1996) allows qualifying Turkish industrial goods to be exported to EU member states without customs duties, and Turkey applies the EU's Common External Tariff to third-country industrial imports. Turkey has aligned its technical standards and IP framework with EU standards in covered sectors. Turkey can function as an EU-access manufacturing base for goods with sufficient Turkish origin content. The Customs Union does not extend to agricultural goods, public procurement, or services. Practice may vary — verify current rules of origin requirements.
- What investment incentives are available for commercial entities in Turkey? Turkey's Investment Incentive System provides differentiated benefits across six regional zones including customs duty exemptions, VAT exemptions, corporate income tax reductions, and SGK employer premium support. Strategic investments in import-substitution sectors receive enhanced benefits. Free zones provide corporate income tax exemptions on manufacturing income. Technology Development Zones (Teknopark) provide tax exemptions for qualifying R&D activities under Law No. 4691. Practice may vary — verify current incentive conditions and applicable benefit packages.
- How does mandatory mediation affect commercial dispute strategy in Turkey? Mandatory commercial mediation for monetary commercial claims and mandatory labor mediation for monetary employment claims require pre-litigation mediation attempts that add 3 weeks to the dispute resolution timeline but create settlement opportunities before costly litigation begins. The mediation process is confidential — positions taken in mediation cannot be used as evidence in subsequent litigation. Parties should plan for mandatory mediation when drafting dispute escalation timelines in commercial contracts. Practice may vary — verify current mandatory mediation procedural requirements.
- Do you advise both Turkish and foreign businesses on business law matters? Yes — we advise Turkish companies on domestic business law compliance and dispute management, and we advise foreign investors and multinational companies on all aspects of Turkish business law from initial market entry through ongoing operations and dispute resolution. For foreign clients, our standard practice is to explain specifically where Turkish law differs from the client's home jurisdiction in ways that affect specific decisions, and to manage all Turkish-language legal processes (filings, correspondence, hearings) entirely on the client's behalf. We work in English throughout all international mandates.
Author: Mirkan Topcu is an attorney registered with the Istanbul Bar Association (Istanbul 1st Bar), Bar Registration No: 67874. His practice focuses on cross-border and high-stakes matters where evidence discipline, procedural accuracy, and risk control are decisive.
He advises Turkish and international businesses across TTK Corporate Governance, TBK Commercial Contract Law, Law No. 4054 Competition Compliance and Competition Authority Representation, İş Kanunu Employment Law and Labor Court Representation, VUK Tax Compliance and Revenue Administration Representation, HMK Commercial Litigation, İİK Enforcement, International and Domestic Arbitration, KVKK Data Protection Compliance, Law No. 6563 E-Commerce Regulatory Compliance, Law No. 6493 Fintech Licensing, Law No. 4875 Foreign Direct Investment Structuring, Investment Incentive Applications, Real Estate and Commercial Lease Transactions, Construction Contract Law, IP Protection and TÜRKPATENT Registration, Mandatory Commercial and Labor Mediation, and M&A Transactions matters where comprehensive Turkish business law expertise is decisive.
Education: Istanbul University Faculty of Law (2018); Galatasaray University, LL.M. (2022). LinkedIn: Profile. Istanbul Bar Association: Official website.