Vienna to Require Host Registration Numbers by 2027

Vienna's city government is preparing a registration system that will require anyone renting out a property short-term to hold an official number before the listing can go live on platforms such as Airbnb, Booking.com or Vrbo. Under the plan, enforcement is due to begin in 2027, giving current hosts roughly two years to get their paperwork in order.

What changes for hosts under the new system

The core requirement is straightforward: no registration number, no listing. Platforms would be expected to check for a valid number before a property can be advertised, and to pull listings that lack one. That shifts compliance checking from city inspectors chasing down individual apartments to an upfront gate at the point of listing, which is a much harder system to slip through than periodic enforcement sweeps.

Vienna has not yet published the fee schedule, the penalty amounts for renting without a number, or the exact documentation hosts will need to submit. Those details are expected to follow before the system takes effect, and operators should treat anything circulating now as provisional rather than final.

How this fits Austria's existing rental rules

Vienna already draws a line between occasional letting of a spare room or apartment and running short-term rental as a business, with the latter requiring a trade license and closer tax scrutiny. The new registration number does not replace that distinction so much as make it enforceable at scale: a citywide database gives authorities a way to cross-check who is actually operating and at what volume, rather than relying on complaints or spot checks. It also mirrors a broader European push toward standardized short-term rental data collection, following the European Union's short-term rental regulation adopted in 2024, which pushes member states toward registration schemes and requires platforms to share host data with local authorities.

What hosts should do before 2027

Anyone letting a property in Vienna, even occasionally, should expect to register formally rather than assume existing informal arrangements will carry over. Operators managing multiple units across Austria and neighboring markets should also watch whether other Austrian cities or the federal government follow Vienna's lead, since a patchwork of city-level registration systems with different numbers, renewal dates and documentation would add real administrative overhead for portfolio managers running listings across several jurisdictions.