DigiKitRent Increase Calculator
Enter your current rent and the increase rate to instantly calculate the new rent amount.
In Turkey, this is legally capped by the 12-month average CPI — look up the current official rate on TÜİK's website and enter it here.
How is rent increase regulated in Turkey?
Under Turkish Code of Obligations, the increase applied when renewing an existing residential lease cannot exceed the 12-month average Consumer Price Index (CPI) change, and the law has occasionally added further temporary caps. Because the applicable rate changes monthly, confirm the current figure on TÜİK's official site or with a legal advisor before using it — this tool only performs the arithmetic, it does not determine the current legal rate.
Why it matters
This calculator is built around Turkish rental rules. Under the Turkish Code of Obligations, an increase on a renewed lease cannot exceed the change in the 12-month average consumer price index (TÜFE) for the previous lease year. Even if a contract names a higher rate, the portion above that limit is generally not enforceable. So the rate you plug in matters as much as the result. Temporary extra caps have also been applied in the past, so it is worth checking which rule covers your period.
Finding the right rate
When TÜİK, Turkey's statistics institute, publishes inflation data each month, it reports several figures: monthly change, annual change, and change based on 12-month averages. Rent increases use the 12-month average figure. The usual practice is to take the most recent release before your lease renewal month. Reading the wrong column can throw the result off by several points.
An example
Say your rent is 20,000 TRY a month and, purely as an example, the applicable 12-month average rate at renewal is 30%. The new rent is 20,000 × 1.30 = 26,000 TRY. If the landlord asks for 40% and that exceeds the legal limit, the tenant does not have to accept the difference. Always take the actual rate from TÜİK's official release.
Common mistakes
- Using the annual change rate instead of the 12-month average.
- Applying the increase partway through the lease year instead of at renewal.
- Trying to apply several missed years of increases in one compounded jump.
- Including separate charges like building maintenance fees in the increase.
- Agreeing the new rent verbally and keeping no written record.
Leases older than five years
Once a lease has run for more than five years and the parties cannot agree, a court can set the new rent based on comparable rents and fairness. In that situation the CPI limit is no longer the only factor.
When to get advice
If you and your landlord or tenant cannot agree on the rate, a rent determination case is on the table, or the contract sets rent in foreign currency or has an unusual increase clause, talk to a lawyer or mediator. The calculator only does the math with the rate you enter. It does not decide whether that rate is legally enforceable.