What Is the 2026 Rent Increase Rate? How Is Rent Increase Calculated?

For 2026, the rent increase rate is calculated based on the twelve-month average of the Consumer Price Index (CPI) announced by the Turkish Statistical Institute (TÜİK) for the relevant period. The applicable increase rate for residential and commercial leases may differ within legal limits. This article is prepared for general legal information purposes. It does not constitute a specific assessment or advice for your individual situation. If you have doubts regarding rent increases, it is recommended to seek legal support. • For 2026, the rent increase rate is determined according to the twelve-month average CPI data announced for the relevant period. • The increase rate for residential and commercial leases may differ; legal limits must be observed. • This article is for general legal information; for advice tailored to your situation, legal support may be sought.

The rent increase rate refers to the maximum rate of increase that the landlord can demand when renewing a lease agreement. This rate is regulated by law to protect tenants. The Turkish Code of Obligations (TBK) includes provisions regarding rent increases, especially for residential and roofed commercial leases. According to the relevant articles of the TBK, the rent increase rate is generally determined based on the twelve-month average of the CPI. Different rules may apply for lease relationships of five years or more. • The rent increase rate refers to the maximum rate of increase applicable when renewing a lease agreement. • The relevant articles of the Turkish Code of Obligations (e.g., TBK Art. 344) form the basis for this matter. • For residential and roofed commercial leases, the increase rate is generally determined by the twelve-month average of the CPI. • Different rules may apply for lease relationships of five years or more.

The applicable rent increase rate for 2026 will be calculated based on the twelve-month average CPI announced by TÜİK. This rate is determined using official data updated each month, and the rate valid at the time of contract renewal is taken as the basis. For residential leases, even if a higher rate is agreed in the contract, the legal limit—the twelve-month average CPI—cannot be exceeded. For commercial leases, if a different rate is agreed between the parties, that rate may apply; however, legal limits must still be observed. • The applicable rate for 2026 is calculated based on the twelve-month average CPI announced by the Turkish Statistical Institute (TÜİK). • For residential leases, this rate cannot be exceeded, even if otherwise agreed in the contract. • For commercial leases, the twelve-month average CPI is generally applied; however, if a different rate is agreed between the parties, that rate may be valid. • Since rates may vary by year and month, current data should be checked at the time of publication.

For residential leases, the rent increase rate is legally capped and generally cannot exceed the twelve-month average CPI. This upper limit cannot be surpassed to protect tenants. For commercial leases, the twelve-month average CPI also applies to contracts made after July 1, 2020. However, if a different rate is agreed between the parties, that rate may be valid. For lease relationships of five years or more, a rent determination lawsuit may be filed, in which case the court considers comparable rents. • For residential leases, the increase rate is legally capped and generally cannot exceed the twelve-month average CPI. • For commercial leases, the twelve-month average CPI also applies to contracts made after July 1, 2020. • Even if a different rate is agreed between the parties, the legal upper limit should not be exceeded. • For lease relationships of five years or more, a rent determination lawsuit may be filed.

To calculate the rent increase, first, the twelve-month average CPI for the relevant month announced by TÜİK should be determined. This is the rate valid at the time of contract renewal. The current rent is multiplied by this rate to find the new rent amount. If a lower rate is agreed in the contract, the rate in favor of the tenant may be applied. When calculating the rent increase, legal limits must not be exceeded. • First, determine the twelve-month average CPI for the relevant month announced by TÜİK. • Multiply the current rent by this rate to calculate the new rent. • For example, if the current rent is 10,000 TL and the twelve-month average CPI is 55%, the new rent = 10,000 TL x 1.55 = 15,500 TL. • If a lower rate is agreed in the contract, that rate may be applied.

When a lease agreement reaches five years, the parties have the right to file a rent determination lawsuit. In this case, the court may be applied to for the rent to be re-determined. The court determines the new rent by considering comparable rents, market values, and the characteristics of the property. At this stage, the CPI rate may not be binding; the court sets a fair rent. Certain procedural and time requirements must be followed for a rent determination lawsuit. • If the lease agreement has reached five years, the parties may file a rent determination lawsuit. • The court determines the new rent by considering comparable rents and market values. • In this case, the CPI rate may not be binding; the court's discretion prevails. • There are specific procedural and time requirements for a rent determination lawsuit.

It should not be assumed that a fixed rate will apply every year for rent increases. Rates may change each year or even each month according to CPI data. The landlord cannot demand an increase exceeding the legal limit. If no rate is specified in the contract, the twelve-month average CPI still applies. Rent determination lawsuits cannot be filed before five years, except in exceptional cases. • A fixed rate does not apply every year; rates change according to the CPI. • The landlord cannot demand an increase exceeding the legal limit. • If no rate is specified in the contract, the twelve-month average CPI still applies. • Rent determination is not possible before five years, except for exceptional cases.

The rent increase rate and calculation method may vary according to legal regulations and current CPI data. Since each case may differ, it may be beneficial to seek legal support in case of doubt. In disputes regarding rent increases, it is important to pay attention to deadlines and procedures to protect the rights of the parties. In Ankara or elsewhere, you may consult a law office for detailed information and assessment. • The rent increase rate and calculation method may change according to legal regulations and current CPI data. • Since each case may differ, it may be beneficial to seek legal support in case of doubt. • In disputes regarding rent increases, attention should be paid to deadlines and procedures to protect the rights of the parties.