Where this rule comes from — and what it's for

The short answer

If you take paid stays at a property in Spain, you have to send each guest's details to the state within 24 hours of check-in. The record exists for public-safety reasons, and it's been a requirement for hotels for decades. What's new is that it's now fully digital and clearly applies to ordinary holiday-let owners, not just hotels.

The law behind it

The duty traces back further than most people expect. The original framework was a 1959 decree that created the paper libro registro hotels kept by hand. The modern rules come from two pieces:

• Ley Orgánica 4/2015 — Spain's public-safety law, which authorises the registration of guests in hospitality and rental activities (articles 25–27).
• Real Decreto 933/2021 — the decree that sets out the modern mechanics: what data is collected, the deadlines, and the electronic system. Published in the BOE on 28 October 2021.

So the why sits in the 2015 law and the how sits in the 2021 decree. The penalties, as it happens, also come from the 2015 law — more on that on the Penalties page.

What changed in December 2024

RD 933/2021 didn't take effect overnight. After two extensions requested by the sector, it became fully enforceable on 2 December 2024. That date matters: it's when the old channels — the paper book and the National Police's online portal — were switched off, leaving a single electronic system for most of Spain. Inspections and sanction proceedings began in 2025.

If you'd been filing the old way, or not at all, December 2024 is the line where the new regime became real.

What it's actually for

The decree states two purposes. The first is public security: keeping a record of who lodged where, available to law enforcement for investigations and counter-terrorism. The second is plain modernisation — replacing a 1959 paper system with something digital. Reading the two together, the guest registry isn't surveillance of you; it's a routine record that now happens to live in a database instead of a ledger.

Who it covers

The list of obligated activities is broad: hotels, hostales and guesthouses, but also tourist apartments (VUT, VFT, VV depending on the region), rural houses, campsites and mountain refuges. Booking platforms — Airbnb, Booking, Vrbo, Expedia — have their own duty to report bookings and cancellations as they happen.

The practical line is simple: if you take paid stays, you're in scope. Whether you also keep a three-year file depends on whether you count as a professional host (letting habitually, registered with the regional tourism registry) or an occasional one. When the line is blurry, the safe move is to register and file.

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