October 2026 Rent Increase Cap
Based on TÜİK's September 2026 inflation release, the legal ceiling for lease renewals dated October 2026 is now confirmed.
Rent Increase Cap
%31.49
12-month average TÜFE
Annual Inflation
%29.73
September 2026 (annual TÜFE)
Monthly Inflation
%1.84
September 2026 (monthly TÜFE)
Note: the rent-increase cap is not the same as the headline annual or monthly inflation rate. Turkish law caps rent increases at the average of the last 12 months' TÜFE changes — a different, usually lower, number.
2026 Rent Increase Rate History
The 12-month average TÜFE used for rent caps has trended gradually downward through the year:
| Period | 12-Month Average TÜFE (Rent Cap) |
|---|---|
| January 2026 | 34.88% |
| May 2026 | ~33% |
| August 2026 | ~32.1% |
| September 2026 | 31.79% |
| October 2026 | 31.49% |
May and August figures are approximate; check TÜİK’s official releases for exact monthly rates.
How Is the Rent Increase Calculated?
Article 344 of Turkey's Code of Obligations (TBK, Law No. 6098) sets a legal ceiling on rent increases for residential and roofed-commercial leases: the average of the last 12 months' Consumer Price Index (TÜFE) changes, as published by TÜİK.
Worked example
A lease at 30,000 TRY/month renewing in October 2026:
30.000 TL × (1 + %31.49) ≈ 39.447 TL
A landlord can ask for less than this amount; a demand above it is not legally enforceable.
This cap applies only to residential and roofed-commercial leases under 5 years old. For leases over 5 years, a judge may apply a different fair-market assessment instead.
Renting as a foreigner in Istanbul?
Our full housing guide covers neighborhood quotas, notary rules, and how to spot an unfair rent-increase demand before you sign.
Read the Istanbul Housing GuideFrequently Asked Questions
The questions we get most often about Turkey’s rent increase cap and TÜİK inflation data.
Official Sources
- TÜİK — official Consumer Price Index (TÜFE) data releases — www.tuik.gov.tr
- Mevzuat.gov.tr — Turkish Code of Obligations (TBK), Article 344 — www.mevzuat.gov.tr/mevzuat?MevzuatNo=6098&MevzuatTur=1&MevzuatTertip=5
This page was last updated 2026-10-05. Rent caps and inflation figures change every month — always confirm the current rate against TÜİK's official release before relying on it.