How do rental contracts and deposits work in Austria in 2026?

Use a clear Mietvertrag (rental contract). Confirm the exact address, Kaltmiete (cold rent), Betriebskosten (building operating costs), heating arrangement, start date, and whether the lease is unbefristet (open-ended) or befristet (fixed-term). Fixed-term residential leases commonly need a minimum duration pattern under MRG practice; if a supposed fixed term is invalid, stronger tenant protection can apply. Ask for every verbal promise in writing.

Confirm Meldezettel rights before you celebrate. City of Vienna guidance requires registration within three days of moving in, with the Meldezettel form signed by you and the housing provider. A lease that forbids registration is a practical red flag for newcomers. See Register your address and search steps in How to rent a home. City price context sits in How much is rent.

Kaution is the security deposit. In full-MRG tenancies, § 16b MRG caps it at six months' gross rent (Hauptmietzins including Betriebskosten and VAT where applicable). Market practice often sits around two to three months' gross rent. In partial or non-MRG cases the statutory six-month ceiling may not apply the same way, so read the contract and get advice if the demand looks extreme. Ask whether the money is held segregated and how interest is handled on return.

Betriebskosten cover shared building costs such as cleaning, waste, caretaker and common utilities. They are usually paid as monthly advances and settled later. Heating may sit inside that package or as Fernwärme billed separately. Budget guidance lives in Utilities, internet, and transport and Monthly budget.

Do a written handover inventory with photos on move-in day. Without that record, exit deductions for "damage" become harder to challenge. Mietervereinigung or Arbeiterkammer advice helps when a clause looks off; Vienna also runs Schlichtungsstelle mediation routes for many rent disputes.

Genossenschaft Finanzierungsbeitrag is not the same as Kaution. Cooperative entry capital follows Wohnungs­gemein­nützigkeits­gesetz rules and a different repayment logic when you leave.