Rent index
Find the rent index and prepare comparable rent
Official starting points for Berlin, Hamburg, Munich, Leipzig and Cologne plus a clear order for the rent-increase check signal.
Classify the home
Note city, location, building age, area, fittings and modernization separately.
Use the official source
Open rent-index calculator, brochure or table and document the matching comparable rent.
Run the check signal
Enter current base rent, proposed base rent, comparable rent, months since last increase and cap.
2024 rent index with online query
Use the official query for location, age band, fittings and comparable rent separately.
Do not confuse it with asking rents; increases need the matching local comparable rent.Open source2025 rent index
Check table, location and building age first, then compare net base rent per square meter.
Hamburg uses its own location and table logic; do not transfer flat rules from other cities.Open sourceQualified 2025 rent index
Use the official online calculator and enter that value into the check signal.
Munich publishes an average, but the specific home depends on location, size, building age and features.Open source2025-2027 rent index
Use the official calculator for midpoint and range; keep the result protocol for your own documentation.
For rent increases, the brochure is decisive; the calculator helps prepare the check.Open sourceCologne 2025 rent index
Check document status, table row and home features directly in the PDF, not from listing portals.
Depending on the document, Cologne may be read as a simple rent index; check status and reasoning carefully.Open sourceSource first, calculator second
The check signal needs a comparable rent that fits the specific home. Get that value from the rent index, official query or document first, then compare current and proposed base rent.
Keep features separate
Building age, location, size, fittings, modernization and range belong separately in your notes. A single average is too rough for an individual case.
Keep the boundary visible
This page links sources and orders the calculation steps. It does not decide whether a rent-increase request is valid.