Part of the topic: 🏠 Home, energy & car
Rent increase check (§ 558 BGB)
Enter your net cold rent three years ago, today, the requested new rent and the local comparative rent from the Mietspiegel. General information, not legal advice.
Voluntary support · Thank-you gift: our checklist PDF · Secure checkout via Digistore24 (Apple Pay, Google Pay, PayPal, card)
🔒 Runs entirely in your browser – nothing you enter is uploaded or stored.
How to use it
- Enter the rent from three years ago and today.
- Enter the requested rent and the comparative rent from the Mietspiegel.
- Choose the cap for your city.
Last checked: October 2026 · Based on: § 558 and § 558b German Civil Code (BGB). Found a mistake? Use the form below – we fix confirmed errors and update the date.
Frequently asked questions
How much can the rent rise in Germany?
Up to the local comparative rent, but by at most 20 % within three years – 15 % in many cities with a tight housing market.
How long do I have to agree?
Until the end of the second month after receiving the request; the new rent applies from the third month.