A detailed legal guide to commercial lease agreements in Turkey, covering rent clauses, currency rules, deposits, assignment, sublease, fit-out, eviction, mandatory mediation, and dispute risks.
Introduction
Commercial lease agreements in Turkey are rarely simple occupancy contracts. For most businesses, the lease is one of the core documents that determines operational continuity, fixed cost exposure, fit-out rights, exit flexibility, and litigation risk. A poorly drafted commercial lease can turn a profitable location into a long-term legal problem, while a well-structured lease can reduce conflict over rent, common expenses, improvements, assignment, default, and termination. Under the Turkish Code of Obligations, leases of roofed workplaces fall within a protected statutory regime that includes several mandatory tenant-protective rules, meaning not every clause parties agree on will actually be enforceable.
In Turkish practice, many commercial leasing disputes are not caused by the absence of a contract, but by the false assumption that “anything can be agreed in a commercial lease.” That assumption is unsafe. Turkish law regulates delivery obligations, rent increases, deposits, assignment, sublease, renewal, default notices, eviction grounds, and even certain clauses that are invalid if they impose unrelated obligations on the tenant or worsen the tenant’s legal position beyond what the statute allows. Since 1 September 2023, most lease-related disputes must also pass through mandatory mediation before a lawsuit is filed, except for non-judgment enforcement eviction proceedings under the Enforcement and Bankruptcy Law.
This article explains commercial lease agreements in Turkey with a focus on the clauses that matter most in practice and the dispute risks that businesses, landlords, and investors should identify before signing. It is written for tenants, landlords, developers, asset managers, and foreign investors who want a practical legal map of Turkish commercial leasing.
The Legal Framework for Commercial Leases in Turkey
The starting point is Article 339 of the Turkish Code of Obligations. It states that the rules on residential and roofed workplace leases apply to roofed commercial premises as well, and also to movable items delivered together with those premises. The same article excludes, by nature, immovables allocated to temporary use and leased for six months or less. In other words, most ordinary office, retail, restaurant, warehouse-with-office, and similar enclosed workplace leases are governed by the roofed-workplace regime rather than by a completely free commercial-contract model.
That matters because several provisions in this regime are mandatory or semi-mandatory. Article 301 requires the landlord to deliver the premises in a condition fit for the agreed use and keep them in that condition during the lease term; for residential and roofed workplace leases, this rule cannot be changed against the tenant. Article 343 adds that, except for determination of the rent amount, the lease may not be modified against the tenant. Article 354 further states that the statutory rules on ending the lease by court action cannot be altered to the tenant’s detriment. These provisions sharply limit the idea that commercial parties can simply contract around the Turkish lease regime.
Why the Description of the Premises and Permitted Use Clause Matters
One of the most important clauses in a Turkish commercial lease is the description of the leased premises and the agreed use. This is not only a commercial point. Article 301 ties the landlord’s delivery obligation to the use intended by the contract, which means the legal standard for delivery and continued suitability depends partly on how the lease defines the premises and the permitted activity. If a space is leased for restaurant use, boutique retail, logistics support, or office use, that wording can affect later arguments about defects, compliance, access, fit-out, and suitability for operation.
For that reason, the lease should clearly identify the independent section, annexes if any, storage rights, parking allocations, signage rights, and the business activity permitted in the premises. A generic clause saying the tenant may use the premises “for commercial purposes” often leaves too much room for later conflict, especially in shopping centers, mixed-use projects, and managed commercial sites where management rules, licensing limits, or co-occupancy issues matter. The clearer the use clause, the easier it is to assess both compliance and breach later.
Rent Clauses: Base Rent, Indexation, and Payment Structure
Rent clauses in Turkish commercial leases should do more than state an amount. They should also address payment date, payment method, VAT treatment where relevant, service-charge separation, and adjustment mechanism. Under Article 314, unless otherwise agreed or unless local custom indicates otherwise, the tenant must pay rent and, where applicable, ancillary expenses at the end of each month and at the latest by the end of the lease term. Article 315 then provides the landlord’s remedy for default after delivery of the premises: the landlord may give written notice and allow time for payment, and in roofed workplace leases that cure period must be at least thirty days.
A major point in modern Turkish practice is rent increase control. The current public legal text for Article 344 states that agreements on rent for renewed lease periods are valid only to the extent they do not exceed the twelve-month average CPI change for the previous rental year, and that after five years or after renewal beyond five years, the court may determine rent by considering CPI, the condition of the premises, and comparable rents. This matters in commercial leasing because even sophisticated parties often draft fixed annual increase clauses that assume total contractual freedom. Turkish law places a statutory ceiling on ordinary renewal increases and a separate court-based regime on long-running leases.
Foreign Currency Clauses in Commercial Leases
Currency clauses are another high-risk area. The Treasury and Finance framework currently states that Turkey-resident persons cannot, as a rule, agree domestic real estate lease payments in foreign currency or indexed to foreign currency for immovables located in Turkey, including roofed workplaces. The same current communiqué also provides an exception where the tenant is a Turkey-resident person without Turkish citizenship or a company within the specific foreign-control category described in paragraph 19. Treasury’s updated FAQ further clarifies that this exception is permissive, not mandatory: the parties may use Turkish lira or foreign currency if they fall within the exception.
This means the currency clause in a commercial lease cannot be treated as a purely commercial drafting choice. The first legal question is whether the parties fall within the prohibition or an exception. The second is whether the lease involves an old converted contract, a PPP-related exception, or another special scenario under the Treasury regime. A lease that violates the currency rules may create enforceability and compliance risk from the outset.
Service Charges, Operating Expenses, Taxes, and Insurance
Commercial lease negotiations in Turkey often focus heavily on rent while leaving cost allocation vague. That is a mistake. Article 302 states that mandatory insurance, taxes, and similar burdens connected with the leased property are borne by the landlord unless otherwise agreed or otherwise provided by law. Article 303 states that the landlord bears ancillary expenses connected with the use of the leased premises where those expenses are incurred by the landlord or a third party. At the same time, Article 341 provides that in residential and roofed workplace leases the tenant bears usage expenses such as heating, lighting, and water unless the contract or local custom provides otherwise, and the party bearing those expenses must provide supporting documents upon request.
For commercial leasing, this makes cost drafting essential. The lease should distinguish between base rent, utility consumption, common-area service charges, management fees, insurance recoveries, marketing contributions if relevant, and taxes that the law places primarily on ownership rather than on use. Ambiguous “all expenses belong to the tenant” clauses are risky because Turkish law already allocates some burdens and requires documentability for certain usage expenses.
Security Deposits and Bank Guarantees
Deposits in Turkish roofed workplace leases are regulated. Article 342 states that if the lease obliges the tenant to provide security, that security cannot exceed three months’ rent. If the security is cash or negotiable instruments, it must be deposited with a bank under the statutory mechanism, and release generally requires both parties’ consent, a finalized enforcement proceeding, or a final court decision. If the landlord does not notify the bank within three months after the lease ends that legal proceedings or enforcement have begun, the bank must return the security upon the tenant’s request.
This rule is especially important because many commercial leases in practice ask for both cash deposit and additional blanket security without carefully examining the statutory structure. Where a bank letter of guarantee is used instead of cash, the drafting should be extremely precise about trigger events, expiry, reduction, and return mechanics. Where cash security is used, parties should remember that informal possession of the deposit by the landlord does not mirror the structure contemplated by Article 342.
Fit-Out, Alterations, and Reinstatement Clauses
Fit-out rights are central in commercial space, especially for retail, restaurant, medical, logistics, and branded office uses. Article 321 states that the tenant may make innovations and alterations only with the landlord’s written consent. If the landlord consented, the landlord cannot demand reinstatement unless this was agreed in writing; and unless otherwise agreed in writing, the tenant cannot demand compensation for value increase resulting from those approved works. Article 320 separately allows the landlord to carry out alterations that do not justify termination and can reasonably be tolerated, while preserving the tenant’s rights to rent reduction and damages if appropriate.
In commercial drafting, this means the lease should address fit-out approval procedure, landlord design review rights, permitting responsibility, ownership of fixtures, removal obligations, and reinstatement standard at exit. A common dispute risk is a lease that says “tenant may fit out with landlord consent” but says nothing about who owns the improvements, whether the landlord may later keep them without payment, or what condition the tenant must return the premises in. Turkish law fills some gaps, but a careful fit-out clause prevents avoidable litigation.
Sublease, Sharing, and Assignment of the Lease
Subletting and assignment are not the same thing under Turkish law, and commercial leases should distinguish them carefully. Article 322 provides that, in residential and roofed workplace leases, the tenant cannot sublease the premises or transfer the right of use without the landlord’s written consent. Article 323 separately regulates transfer of the lease relationship and states that the tenant cannot transfer the lease without the landlord’s written consent, but in workplace leases the landlord may not refuse consent without justified cause. Once the lease is validly transferred, the transferee steps into the tenant’s position and the transferring tenant is released from obligations toward the landlord.
This is one of the most important commercial points in Turkish leasing. Many leases try to prohibit all transfer and assignment under any circumstances. Turkish law is less absolute: in workplace leases, refusal to consent to lease transfer must rest on a justified reason. That is why assignment, group-company occupation, internal restructuring, franchise change, and business sale scenarios should be drafted with care. The lease should say what requires consent, what constitutes justified refusal, whether share-deal control changes are treated as assignment-like events, and what documents the landlord may request.
Linked Contracts and Side Obligations
Article 340 is highly relevant to shopping-center, managed-office, and branded-concept leases. It states that in residential and roofed workplace leases, if formation or continuation of the lease is made dependent on the tenant undertaking another obligation that is not directly related to the use of the premises and does not benefit the tenant, that lease-linked contract is invalid. This provision is a serious warning against overreaching package arrangements.
In commercial practice, this can affect clauses that force the tenant into unrelated service packages, affiliated purchasing obligations, or side undertakings not genuinely connected to the leased premises. Not every operational covenant is invalid; but where the side obligation is not directly linked to the use of the premises and serves no tenant benefit, Article 340 becomes a real risk.
Tenant-Unfavorable Clauses and Penalty Risks
Article 343 states that, other than determination of the rent amount, changes to the lease cannot be made against the tenant. Article 346 adds that the tenant cannot be burdened with payments other than rent and ancillary expenses; specifically, clauses providing for a contractual penalty for late payment or acceleration of future rents are invalid. These two provisions are among the most commercially disruptive rules for aggressive landlord drafting because they invalidate some clauses that would otherwise be standard in general commercial contracts.
This is why penalty, acceleration, and “all losses of any kind” clauses should be drafted with caution. Turkish commercial landlords often try to secure stronger payment remedies through the lease text, but where the lease qualifies as a roofed workplace lease, statutory limits matter. A sophisticated-looking clause is not useful if Turkish law treats it as invalid.
Early Exit, Default, and Extraordinary Termination
Early exit is a major dispute area in commercial leasing. Article 325 provides that if the tenant returns the premises before the contract term ends or before the relevant notice period, the tenant’s obligations continue for a reasonable period during which the premises could be re-let under similar conditions. However, if the tenant finds a financially capable replacement tenant whom the landlord can reasonably be expected to accept and who is ready to take over the lease before that period expires, the outgoing tenant’s obligations end. The landlord must deduct expenses saved and benefits obtained or deliberately not obtained.
This rule makes replacement-tenant drafting and mitigation important. A lease should define the process for proposing a replacement tenant, what documents the landlord may demand, and how handover timing affects liability. Without that structure, early surrender disputes become fact-intensive and expensive.
Article 315 governs rent default after delivery and requires written notice with a minimum thirty-day cure period for roofed workplace leases. Article 316 governs misuse and neighbor-respect breaches; in roofed workplace leases the landlord generally must grant at least thirty days to cure, unless the tenant intentionally causes severe damage, cure time would clearly be useless, or the conduct is intolerable. Article 331 also allows either party to terminate extraordinarily if important reasons make continuation unbearable, with the court determining the financial consequences if disputed.
Sale of the Property, Registration Annotation, and Business Continuity
Businesses often assume that if the building is sold, the lease automatically ends. That is not the Turkish rule. Article 310 provides that if the leased property changes hands for any reason after the lease is formed, the new owner becomes a party to the lease. Article 312 further allows the parties to agree that the tenant’s lease right be annotated in the land registry in immovable leases. For anchor tenants, long-term occupiers, and investors making serious fit-out investments, registration annotation can be strategically important.
This does not mean every sale is harmless for the tenant. A new owner may still use statutory need-based termination routes in appropriate cases, and operational disruption can still arise. But the automatic substitution rule in Article 310 gives commercial tenants a meaningful baseline protection that should be considered during due diligence and drafting.
Handover, Exit Condition, and the Landlord’s Lien
Exit disputes in commercial leasing are often about condition, not rent. Article 334 states that the tenant must return the premises in the condition in which it was received, except for wear and deterioration resulting from proper use, and invalidates pre-agreed clauses requiring extra compensation beyond damages caused by non-compliant use. Article 335 requires the landlord to inspect the premises upon return and promptly notify the tenant in writing of defects and deficiencies for which the tenant is responsible; if the landlord does not do so, the tenant is released, except for defects that could not be discovered in an ordinary inspection.
Commercial leases should therefore include a detailed handover protocol at entry and a clear return standard at exit. Without those documents, disputes about floor damage, MEP works, façade changes, partitions, cabling, and signage removal become hard to prove.
A uniquely commercial risk is the landlord’s statutory lien. Article 336 provides that, in immovable leases, the landlord has a lien over movables found in the premises and used for furnishing or operating the premises as security for one year of accrued rent and six months of accruing rent; the lien also extends, within limits, to similar movables brought by a subtenant. This can be highly relevant in retail, restaurant, warehouse, and showroom disputes.
Renewal, Eviction, and Litigation Risk
Commercial parties are often surprised by Turkish renewal rules. Article 347 states that in roofed workplace leases, if the tenant does not give notice at least fifteen days before the end of a fixed term, the lease is deemed extended for one year on the same terms. The landlord cannot terminate merely because the term expired. After the end of the ten-year extension period, however, the landlord may terminate without reason by giving at least three months’ notice before the end of the relevant extension year.
Eviction by lawsuit is also statute-driven. Article 350 allows termination actions based on the landlord’s or close relatives’ need for residential or workplace use, or because substantial reconstruction or redevelopment makes continued use impossible. Article 351 gives a new owner a need-based action route if written notice is served within one month of acquisition. Article 352 provides additional tenant-based grounds, including a valid written vacate undertaking, repeated justified payment notices, and certain cases where the tenant or spouse has another suitable residence in the same locality. Article 355 then restricts re-letting after need-based or reconstruction-based eviction and imposes compensation consequences for abuse.
Mandatory Mediation Before Suit
A final practical point is procedure. Article 18/B of the Mediation Law states that, except for the non-judgment enforcement eviction route under the Enforcement and Bankruptcy Law, disputes arising from the lease relationship require mandatory mediation before filing suit. For commercial leases, this means rent, receivables, deposit return, many termination disputes, and other lease-based claims generally cannot go straight to court.
That procedural rule changes drafting strategy as well as dispute strategy. Clear written notices, payment records, service-charge support, and handover minutes become even more valuable because they shape the mediation process before any judge sees the file.
Conclusion
Commercial lease agreements in Turkey sit at the intersection of contract drafting and mandatory lease law. The most important clauses are not only the rent amount and term, but also use definition, cost allocation, currency, security, fit-out, assignment, early exit, notice, and handover provisions. Turkish law limits some landlord-friendly drafting strategies, especially through Articles 340, 343, 346, 347, and 354, while also giving landlords structured remedies for default, misuse, need-based termination, and protection of rent through the statutory lien.
The practical lesson is simple: a commercial lease in Turkey should be drafted as a litigation-prevention document, not merely a rent agreement. Where the premises are valuable, the fit-out is significant, or the tenant’s business depends heavily on location, investing in careful drafting at the start is far cheaper than arguing later over a clause Turkish law never allowed in the first place.
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