🏠 Rent Increase Calculator

What does this rent increase calculator calculate?

This calculator estimates the new rent amount using the current rent, a user-entered TÜFE 12-month average rate and, optionally, an applied increase rate. If the applied rate is left empty, the TÜFE rate is used. If the applied rate is higher than TÜFE, the calculator caps the calculation at the TÜFE rate.

• Estimates the new rent amount.
• Shows the monthly increase amount and applied rate.
• Shows the TÜFE upper-limit rent based on the entered rate.
• Shows the difference if a lower-than-TÜFE increase is applied.
• Does not fetch live TÜİK data automatically.

How is rent increase calculated?

The basic calculation adds a percentage increase to the current rent. The key is not the arithmetic itself, but entering the correct TÜFE 12-month average rate for the correct renewal period.

The simplified formula is: new rent = current rent × (1 + applied increase rate / 100). If no applied rate is entered, the TÜFE rate is used. If a separate applied rate is entered, it is applied only up to the TÜFE cap used by the calculator.

What is the TÜFE 12-month average?

For rent increases in Turkey, the relevant TÜFE figure is commonly the change based on twelve-month averages in the consumer price index, not simply a headline annual inflation figure.

Article 344 of the Turkish Code of Obligations links renewal-period rent increases for housing and roofed workplace leases to a cap based on the twelve-month average change in the consumer price index. For leases longer than five years or renewed after five years, additional judicial rent determination considerations may arise.

What is the applied increase rate field for?

The parties may agree on an increase below the TÜFE cap. The optional applied increase rate field is designed for that situation. If it is empty, the calculator uses TÜFE; if a lower rate is entered, the new rent is calculated using that lower rate.

If the applied rate entered is higher than TÜFE, the calculator uses the TÜFE rate instead. This prevents the page from presenting an above-cap rate as a normal rent increase result.

Housing and roofed workplace leases: what to watch

Rent increase calculations often concern housing and roofed workplace leases. The general framework for these contracts is linked to Article 344, but each contract can still require its own review.

• The renewal date must be identified correctly.
• The TÜFE rate must match the relevant renewal month.
• Leases older than five years may involve rent determination proceedings.
• Foreign-currency rents can involve different restrictions or analysis.
• In disputes, the lease and legal assessment matter more than a calculator result.

What does this calculator not do?

The calculator provides a numerical estimate. It does not issue a legal opinion, official decision or court-level rent determination.

• It does not fetch live TÜİK data.
• It does not calculate rent determination lawsuits.
• It does not model judicial discretion after five years.
• It does not separately evaluate foreign-currency rent.
• It does not calculate rental income tax, withholding or eviction processes.
• It does not produce a legally binding result.

Is rent increase the same as inflation calculation?

No. Inflation calculation generally shows how purchasing power changes. Rent increase calculation estimates a new rent amount for a lease renewal period using a relevant rent-increase input.

Headline inflation, annual TÜFE change and TÜFE 12-month average should not be mixed. The correct input for a rent increase depends on the lease period and the applicable legal framework.

Why can the real result differ from the calculator?

The same current rent and TÜFE rate can produce the same mathematical result, but that result can have different legal meaning depending on the contract and context.

• The TÜFE rate for the wrong renewal month may have been used.
• The contract may specify a lower rate.
• A five-year rent determination issue may exist.
• The parties may have a separate agreement or dispute.
• The rental relationship may not fit a simple housing/roofed workplace case.

When is professional review needed?

For a simple renewal estimate, the calculator can be useful. But if the increase is disputed, the contract is old, the five-year threshold matters, the rent is in foreign currency, or the parties disagree, an automatic calculation is not enough.

The lease contract, payment history, renewal date, comparable rents and current legal framework should be evaluated together.

How should you read the result?

The new rent shown by the calculator is an informational estimate based on your inputs. The most important point is to enter the correct current rent and the correct TÜFE 12-month average rate.

• New rent: estimated rent after the applied increase.
• Increase amount: the monthly difference added to current rent.
• TÜFE upper-limit rent: the upper amount based on the entered TÜFE rate.
• Annual difference: the monthly increase multiplied by 12.
• Below TÜFE limit: the difference if a lower applied rate is used.