Inflation expectations and calculation process for the October 2026 rent increase rate
The October rent increase rate, awaited by millions of tenants and landlords, will become clear with the September inflation data to be announced by TÜİK on October 5, 2026.
While inflation expectations are taking shape for landlords and tenants renewing their lease agreements in October 2026, the exact increase rate will be determined by the data to be announced by TÜİK on October 5, 2026.
Expectations for the October rent increase rate
Millions of tenants and landlords who will renew their lease agreements in October are focused on inflation figures to learn what the rent increase rate applied in the new period will be.
Estimates made by economists ahead of the September inflation figures have also caused new rent increase rate calculations to be reshaped.
Economists' September inflation forecasts
According to the results of the Inflation Expectation Survey conducted by AA Finance with twenty economists, the average September monthly CPI expectation was calculated as 2.18 percent.
In the event that economists' monthly expectation of 2.18 percent materializes, annual inflation, which was 31.51 percent in August, is projected to drop to 30.16 percent in September.
Additionally, in the Central Bank of the Republic of Turkey's September 2026 Market Participants Survey, the current year-end CPI expectation was announced as 29.61 percent, and the September monthly CPI expectation as 2.12 percent.
Calculation method of the rent increase rate
The October 2026 rent increase rate has not yet been finalized, and monthly or annual inflation figures are not applied directly in rent increases.
In the current calculation system, the rate of change in the consumer price index based on twelve-month averages is taken as the basis, and current expectations indicate that the new rate may remain at around the 31.5 levels.
TÜİK data announcement and previous rates
The September 2026 inflation figures will be announced to the public by the Turkish Statistical Institute on Monday, October 5, 2026, and following these data, the ceiling rate for October will be finalized.
According to TÜİK data, while consumer prices increased by 1.84 percent on a monthly basis in August, annual inflation was 31.51 percent and the change according to twelve-month averages was 31.79 percent.
The legal upper limit applied in lease agreements renewed in the September 2026 period stood at 31.79 percent.