Calculator
Rent Increase Calculator
Calculate the new rent instantly with the selected period’s CPI rate and the legal cap.
Calculator
CPI Increase Calculation
Calculate within legal limits using current CPI (TÜFE) rates
TÜFE%39.62
Selected CPI Data: 2025 September
CPI Rate %39.62
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Enter the required information and click "Calculate Increase" to calculate rent increase.
Full control with withholding calculation
Also Calculate Rent Withholding!
After calculating your rent increase, find out the withholding tax deducted from your new rent. Calculate 20% withholding, net rental income, and yearly projections.
About CPI And Rent Increases
- Legal cap
- The increase rate may be capped by the legal upper limit for the period (often 25%).
- What is CPI
- The Consumer Price Index is the official inflation measure published by TurkStat.
- Calculation period
- Pick the CPI period that matches your contract renewal date.
How Is A Rent Increase Calculated?
New rent = current rent × (1 + applicable rate). If CPI exceeds the legal cap, the tool applies the cap.
Formula
New rent = Current rent × (1 + Applicable rate / 100)
Applicable rate = min(CPI, legal cap)
Track It With Kira Portal
Manage collections, reminders and renewals in one place — don’t miss increase dates.
Frequently Asked Questions
- How is the rent increase rate set?
- Usually the period’s CPI and the legal cap in force are considered together.
- When can rent be increased?
- For most residential leases, at the contract anniversary within the legal framework.
- What if CPI exceeds the legal cap?
- If a legal cap applies, the tool uses it and notes this on the result screen.
- Is the calculator free?
- Yes. It’s free — no signup required.