Compliance Watch · Porto

1.6% of Porto Airbnb listings are missing or have malformed RNAL registration numbers.

Last updated:

14999 listings analysed from the 25 December 2025 Inside Airbnb snapshot. 0 carry no registration number at all; 247 display a value that doesn't match the RNAL format. Under Decreto-Lei 128/2014 (and the Mais Habitação revisions) this is the operator's exposure, not the platform's.

14999
Listings analysed
14465
Format-valid
96.4%
247
Malformed
1.6%
0
Missing entirely
0.0%

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What is the RNAL number?

Porto short-term rentals must carry a valid RNAL registration number in the format NNNNN/AL under Decreto-Lei 128/2014. From 20 May 2026, Airbnb and Booking must verify this number against the EU central register under Regulation 2024/1028 before publishing the listing.

The RNAL (Registo Nacional de Alojamento Local) is Portugal's national short-term rental register. Every Porto listing rented to non-residents must carry a valid RNAL number in the format NNNNN/AL — five digits, slash, AL.

Porto has been comparatively well-policed (only ~2% of scraped listings carry no number at all), but malformed numbers are still common — typically bare integers without the /AL suffix, or expired registrations that the operator hasn't refreshed.

From 20 May 2026 the new EU Regulation 2024/1028 central register kicks in: Airbnb and Booking will be required to verify each RNAL number before publishing the listing. Listings without a verifiable number get pulled.

Common questions

What's the difference between RNAL and the EU NRUA?

RNAL is the existing Portuguese national register, format NNNNN/AL. The EU NRUA (Numero de Registro Único de Alojamiento) is a new central EU register coming online on 20 May 2026 under Regulation 2024/1028. Portugal's RNAL feeds into the EU NRUA — operators with a valid RNAL won't need to re-register, but the platforms (Airbnb, Booking) will start verifying numbers against the central register before allowing the listing to publish.

What happens if I don't have a registration number?

Until May 2026, the platform may keep your listing up but you remain personally liable for fines under Decreto-Lei 128/2014 — typically €2,500 to €40,000 for unregistered rentals. From 20 May 2026, the platform itself is required to refuse or pull your listing under EU Regulation 2024/1028. The fine exposure stays.

I'm not sure if my listing has the right number.

Paste your URL into the form above. We'll match it against our most recent dataset (a Q4 2025 snapshot). If it's in there, you'll see what registration value is currently stamped on it — sometimes hosts have a number on file that they haven't actually published. If it's not in our snapshot, we'll run a fresh audit.

Where does this data come from?

From quarterly Inside Airbnb snapshots, an open dataset covering most large European cities. We re-import on the 1st of each month and re-evaluate registration numbers against the official register format and (where reachable) the live RNAL site at rnt.turismodeportugal.pt. The data is anonymised at the host level — we report aggregate statistics, not individual host names.

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