Challenge Rent Increase: Tenant Rights in Austria

Tenant rights & basic protections (MRG) 3 min read · published September 10, 2025

Many tenants in Austria face the question of how to respond to a announced rent increase. This guide explains in clear language which rights tenants have, which deadlines apply and which pieces of evidence are important so that you can review and, if necessary, challenge an increase. It describes steps from documentation to filing a complaint in court and gives practical tips for negotiations with the landlord. The information is based on the Mietrechtsgesetz (MRG) and common procedural paths in Austria so you can recognize concrete actions and safely assert your rights as a tenant.

What is a rent increase?

A rent increase is an adjustment of the contractually agreed rent by the landlord. In many cases the increase must be justified in writing and comply with the legal requirements of the Mietrechtsgesetz [1]. Check the reasoning, the calculation basis and whether formal requirements such as deadlines and service were observed.

In most cases a written justification for the increase is required.

When can tenants challenge?

  • If the calculation of the increase is unclear or incorrect (rent), for example wrong square meter figures or unjustified surcharges.
  • If formal requirements were not met (notice), for example missing or late service of the notice.
  • If there is a lack of evidence for necessary adjustments (evidence), for example no basis for index-based or market-based adjustments.
  • In case of clearly inadmissible or arbitrary increases you can have the amount judicially reviewed (court).
Detailed documentation increases your chances of success in disputes.

Before a lawsuit it is often worthwhile to send a formal objection or to speak with the landlord to clarify misunderstandings. Observe deadlines and collect evidence: old rental contracts, payment receipts, photos and written communication.

Challenge process: step by step

Check and document

Compare the new calculation with your existing contract and collect all documents: rental agreement, handover records, payment receipts and correspondence. Take photos of the apartment condition and issues relevant to the defense.

Keep all receipts and emails organized and stored safely.

Formal reply to the landlord

Promptly write a formal objection and request a comprehensible justification. Set a deadline for clarification and indicate that you will consider legal steps if the response is inadequate.

Judicial steps

If negotiations fail you can file a lawsuit at the competent district court. Submit your documents in full and, if applicable, use JustizOnline for submissions or sample forms [2]. A proceeding examines the legality and amount of the increase.

Respond to legal notices within deadlines to avoid losing rights.

FAQ

Can I immediately sue against a rent increase?
You can object and, if necessary, initiate legal action; however a written exchange with the landlord is often recommended first.
What deadlines apply when challenging?
Deadlines depend on the individual case and the method of service; act promptly and note dates of sending and receipt.

How-To

  1. Gather documents: rental agreement, payment receipts, correspondence and photos.
  2. Write and serve a formal objection to the landlord.
  3. Check justifications: are index, market adjustment or operating costs calculated correctly (rent)?
  4. Seek advice if unsure, e.g. tenant association or lawyer.
  5. If necessary: file a claim at the district court and present evidence (court).

Key Takeaways

  • Documentation is essential for a successful objection.
  • Observe deadlines: delays can limit your rights.
  • A written objection documents your position and creates clarity.

Help and Support


  1. [1] Mietrechtsgesetz (MRG) - RIS
  2. [2] JustizOnline - Court Submissions
Bob Jones
Bob Jones

Editor & Researcher, Tenant Rights Austria

Bob writes and reviews tenant law content for various regions. They’re passionate about housing justice and simplifying legal protections for tenants everywhere.