Tool · Rent Increase
Rent Increase Calculator (CPI / TÜFE)
Enter your current rent and the 12-month CPI (TÜFE) average for your contract renewal month to instantly see the new rent, the monthly increase and the annual difference. In Türkiye, home and workplace rent increases are legally tied to this rate.
Enter the current rent to calculate.
How is a rent increase calculated?
New rent = current rent × (1 + CPI rate / 100). For example, with ₺20,000 rent and a 30% CPI rate the new rent is ₺26,000 (+₺6,000/month, +₺72,000/year). The rate to use is the latest 12-month CPI (TÜFE) average announced by TÜİK for your contract renewal month; it changes monthly, so confirm the figure for your renewal month with TÜİK.
The legal cap and your rights
Under the Turkish Code of Obligations, the annual increase in home and workplace lease contracts cannot exceed the 12-month CPI average for the renewal month. Even if the contract states a higher rate, the portion above this cap is invalid. The parties may agree on a lower rate, but not above the cap. In a dispute, a rent-determination/adaptation case can be filed at the civil court. This tool is informational; seek legal advice for your specific case.
Frequently Asked Questions
How is the rent increase rate determined?
The legal cap is the 12-month CPI (Consumer Price Index) average for the contract renewal month. TÜİK announces this rate every month.
Does the same rule apply to commercial leases?
Yes. As the temporary measures for workplace leases ended after 2024, commercial rent increases are also capped at the 12-month CPI average.
Which month's CPI should I use?
Use the 12-month CPI average for your contract's renewal (start) month. As the rate changes monthly, verify the current value for your renewal month with TÜİK.
Can the landlord ask for an increase above the cap?
No. Increase demands exceeding the cap are legally invalid. The tenant is only obliged to pay the increase up to the legal cap.
Is it different for leases longer than 5 years?
Yes. For tenancies longer than 5 years, the court may set the rent according to market value without being bound by the CPI cap. Legal support is recommended for this case.