Rent Increase Rate
Calculate the CPI-based legal rent increase rate and the new rent ceiling by renewal month.
This mode calculates the legal maximum rent increase rate and the highest new rent amount for the selected renewal month based on the 12-month CPI average.
How is the rent increase rate calculated?
In a standard annual renewal, the rent increase ceiling is determined by the 12-month CPI average under the Turkish Code of Obligations. The tool multiplies the published rate for the selected month by the current rent to find the highest new rent and the monthly/annual difference. If the contract has a lower agreed rate, you can apply it in custom-rate mode.
Scope and assumptions
The tool is for practical rent renewal calculations. It uses monthly rates after July 1, 2024, when the temporary 25% cap for residential leases ended. The April 2026 rate is derived from the 12-month average in the official CPI bulletin dated April 3, 2026 because the corresponding archive notice was not publicly visible.