Mietpreisbremse (Rent Cap) 2026: What Tenants Need to Know Now

What is the Mietpreisbremse (rent cap)?

The Mietpreisbremse is a statutory rule under § 556d BGB that applies to new lettings in tight housing markets. It caps the permissible rent at no more than 10 percent above the ortsübliche Vergleichsmiete (local comparative rent). Its aim is to protect tenants from excessive rent demands and to safeguard affordable housing in major cities.

Since its introduction in 2015, the Mietpreisbremse has been reformed and tightened several times. With the latest amendment, it now applies until at least 2029 — a clear signal from lawmakers that tenant protection remains a high priority.

Extension until 2029: What is changing

The Bundestag (federal parliament) has extended the Mietpreisbremse until 31 December 2029. This decision affects millions of tenants in Germany. Here is an overview of the most important changes:

• Longer duration: The federal states (Bundesländer) can now apply the Mietpreisbremse by ordinance until the end of 2029, instead of only for five years as before.
• Stronger claim for reimbursement: Tenants can reclaim overpaid rent from the moment they file a Rüge (formal objection). Since the Mietrechtsanpassungsgesetz (Rent Law Adjustment Act) of 1 January 2019, a simple, informal objection is sufficient — a qualified objection with detailed reasoning is no longer required. The limitation period is three years.
• Extended duty of disclosure: When the contract is signed, landlords must state, without being asked, whether an exemption from the Mietpreisbremse applies and on what basis the requested rent is calculated.
• Stronger enforcement: The burden of proof lies more heavily with the landlord when it comes to grounds for exemption.

Which cities are affected?

The Mietpreisbremse does not automatically apply everywhere. Each federal state decides for itself which areas the ordinance covers. It currently applies in over 300 cities and municipalities, including:

• Berlin: Applies across the entire city since 2015
• Munich: One of Germany's tightest housing markets
• Hamburg: Applies since 2015, with regularly updated Mietspiegel (rent indexes)
• Frankfurt am Main: Particularly affected by high demand in and around the banking district
• Cologne, Düsseldorf, Stuttgart: All major cities in North Rhine-Westphalia and Baden-Württemberg are included
• Leipzig, Dresden: East German cities with rising rents are now covered too

You can check directly whether your city is affected with the KlarMiet rent checker. Simply enter your address and get an assessment within seconds.

Exemptions: When does the Mietpreisbremse not apply?

There are important exemptions where the Mietpreisbremse does not apply:

• New builds: Flats first used and let after 1 October 2014 are exempt.
• Comprehensive modernisation: If the flat has been renovated so extensively that it is equivalent to a new build, the cap does not apply.
• Previous tenant's rent: If the previous tenant's rent was already higher than the rent permitted under the Mietpreisbremse, the landlord may keep that rent.
• Furnished flats: Special rules apply here regarding the furniture surcharge.

How to check your rent in 3 steps

Checking your rent is easier than many people think. With KlarMiet it takes just a few minutes:

• Step 1 — Enter your data: Enter your city, the size of the flat, the year of construction, and the current Kaltmiete (base/net rent excluding utilities).
• Step 2 — AI analysis: Our AI compares your rent with the current Mietspiegel (rent index) and calculates the maximum permissible rent.
• Step 3 — Get your result: You will immediately learn whether your rent is too high and how much you overpay each month. If needed, KlarMiet drafts a letter of objection.

Reclaiming overpaid rent

If your rent exceeds the maximum permissible rent, you have the right to reclaim the overpaid difference. To do so, you must send a Rüge (formal objection) to the landlord. You can only reclaim the rent that became due after the objection was received (§ 556g Abs. 2 BGB) — the law does not provide for retroactive reimbursement from the start of the tenancy.

KlarMiet creates a pre-drafted letter of objection for you that you can send directly to your landlord. The letter contains all the relevant details: the calculation of the permissible rent, the reference to the Mietspiegel, and the estimated potential amount to be reclaimed.

Conclusion: Take action now

The extension of the Mietpreisbremse until 2029 is good news for tenants. Use your rights and check whether your rent complies with the legal requirements. The sooner you act, the more money you can reclaim. With KlarMiet, the check is free, fast, and straightforward.