Enter the current and proposed rent to get the increase percentage — and check it against the legal cap and notice rules in your country.
Legal caps are approximate and from RentFlow's country dataset (2025-Q4). Always verify with official sources before issuing an increase. Local/city rules may be stricter.
Most countries limit how much and how often rent can rise, and require written notice. Calculate your increase percentage above, check it against your country's cap, and give the required notice. For the full rules, see the rent increase laws guide for your country.
Percentage increase = (new rent − current rent) ÷ current rent × 100. A rise from 1,500 to 1,600 is a 6.7% increase.
It depends on the country — from a hard cap (e.g. 20% over 3 years in Germany) to an index (e.g. TÜFE in Turkey) to no national cap (e.g. England). Select your country above to check.
Almost always yes. Notice periods range from 30 to 120 days depending on the country. The calculator shows the required notice for your selection.
RentFlow flags when a proposed increase exceeds your country's cap or notice rules — before you send it. Free to start.
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