Rent Increase Cap in Türkiye: Legal Limit, Calculation and Tenant Rights

What Is the Rent Increase Cap in Türkiye?

The rent increase cap is the statutory upper limit on how much the rent payable may rise when a lease renews. The parties are not free to set this figure at will; the legislator has fixed an explicit ceiling in order to protect the tenant.

Article 344 of the Turkish Code of Obligations provides that agreements on the rent payable in renewed lease periods are valid only insofar as they do not exceed the twelve-month average change in the consumer price index for the preceding lease year. The rule applies to leases longer than one year as well.

In short: whatever percentage the contract names, the increase that can actually be demanded is capped by the twelve-month index average.

Which Index Figure Applies?

The calculation uses the consumer price index published by the Turkish Statistical Institute, and specifically the change according to twelve-month averages. This is not the same as the annual change in the index. The two are calculated differently and the gap between them can be substantial — a point foreign landlords and tenants frequently misread.

The applicable figure is fixed by reference to the month in which the lease year renews. For a lease renewing each March, the twelve-month average change published in February governs.

Leases Denominated in Foreign Currency

This is the rule that most often surprises foreign parties, and it works in the opposite direction from the ceiling described above.

Where the rent is agreed in a foreign currency, the rent may not be altered for five years. Neither indexation nor any contractual escalation clause changes this. Once five years have elapsed, the rent may be redetermined, and in that determination the change in the value of the foreign currency is taken into account alongside the other criteria.

In Antalya, where a significant share of leases involving foreign owners and tenants is denominated in euro or dollar, escalation demands made before the five-year period expires are a recurring source of dispute. A demand raised in year two of such a lease has no legal basis, however the contract is worded.

What If the Lease Does Not State an Increase Rate?

Silence does not mean the rent is frozen. Where the contract contains no clause on escalation, the statutory ceiling still applies and the rent may be raised by the same index figure.

The landlord must, however, notify the tenant of the demand. The extent to which arrears may be claimed for periods that passed without notification is assessed in light of the circumstances and the conduct of the parties.

Can a Higher Increase Be Agreed?

No. A clause naming a figure above the statutory ceiling is not automatically struck out, but the increase that may be demanded remains capped. The tenant is not obliged to pay the excess.

Nor does payment of the excess create an acquired right for the landlord. Sums paid above the ceiling may be reclaimed or set off against subsequent rent. Where such a payment is made under practical pressure, it should be made with an express reservation of rights, since an unreserved payment may later be argued to constitute acceptance.

After Five Years the Regime Changes

For leases running longer than five years, or renewed after five years, the increase is no longer tied to the index. At that stage the rent is redetermined on equitable principles, taking into account the change in the index, the condition of the leased property and comparable rents in the area.

That determination is made through a rent determination action. The mere expiry of five years does not raise the rent automatically; the landlord must bring proceedings.

The detail of market-rent assessment and the procedure is set out in our guide on rent determination for leases exceeding five years.

Where the Tenant Faces an Excessive Demand

A demand above the statutory ceiling creates no obligation to pay. So long as the tenant continues to pay the correctly calculated statutory increase, the tenant is not in default and eviction on grounds of non-payment is not available to the landlord.

Before proceedings may be brought in a dispute arising from a lease relationship, recourse to mediation is a condition precedent. An action filed without completing mediation is rejected on procedural grounds.

How Should an Increase Be Notified?

Notarial service is not a condition of validity, but a written and demonstrably delivered channel should be preferred for evidentiary purposes. A formal notice establishes both the date and the content of the demand should a dispute follow.

Rent Increase and Rent Determination Are Not the Same

An increase is an ordinary annual adjustment within the index ceiling, made under the existing contract. A rent determination is a judicial redetermination of the rent and, as a rule, depends on the five-year period having elapsed.

A judgment in a rent determination action takes effect for the period following the lease year in which the action was brought. The timing of filing is therefore decisive for the amount that may ultimately be claimed.