Fines in Portugal for Not Submitting Guest Data to SIBA (What Hosts Must Know)

If you operate Alojamento Local (AL) in Portugal, submitting guest information to SIBA is not optional.
Failure to comply can result in significant fines, inspections, and even suspension of your AL licence.

This article explains what SIBA is, who must submit, what happens if you don’t, and how to avoid fines entirely.

What Is SIBA and Why It Exists

SIBA (Sistema de Informação de Boletins de Alojamento) is the official system used by Portuguese immigration authorities to collect guest data.

It applies to:

• Airbnb hosts

• Booking.com hosts

• Local accommodation owners (AL)

• Property managers renting short-term

The goal is to:

• Monitor foreign guest stays

• Support border control and public security

• Ensure legal compliance in short-term rentals

If you host foreign guests, you must report their stay.

Who Is Legally Required to Submit to SIBA?

You must submit guest data if:

• Your property is registered as Alojamento Local

• You host non-Portuguese guests

• The stay is short-term (tourism / temporary lodging)

It does not matter if:

• Airbnb collected the guest’s passport

• You use a channel manager

• The guest stayed only one night

The legal responsibility is always on the host.

What Are the Fines for Not Submitting to SIBA?

Failure to submit guest data can result in administrative offences (contra-ordenações).

Typical Fine Ranges

Fines can accumulate per guest, not per booking.

One busy month can easily result in thousands of euros in penalties.

Common Mistakes That Lead to Fines

Most hosts don’t get fined intentionally—they get fined because of process gaps.

Common issues include:

• Forgetting to submit arrivals manually

• Missing late check-ins

• Assuming Airbnb reports automatically

• Not knowing SIBA deadlines

• Losing passport photos or data

• Guests refusing to send details

Authorities do not accept “I didn’t know” as a defence.

Deadlines: When Must You Submit Guest Data?

You must submit guest data:

• At check-in or shortly after arrival

• According to SIBA reporting timelines

Delays can already place you in non-compliance, even if you submit later.

How Inspections Usually Happen

Fines often arise after:

• Cross-checks between Airbnb data and SIBA

• Municipal inspections

• Immigration audits

• Neighbour complaints

• Random compliance checks

Once flagged, past stays may be reviewed.

How to Avoid SIBA Fines Completely

The safest approach is to remove manual work entirely.

Best practices:

• Collect guest details before arrival

• Use a single secure check-in link

• Store submissions automatically

• Keep a clear audit trail

• Ensure submissions are complete and timely

Automation drastically reduces risk.

A Simpler Way: Automated Guest Check-In

Tools like EazyAL help hosts:

• Send guests a secure check-in form

• Collect passport and stay details

• Centralise submissions

• Reduce human error

• Stay compliant without stress

For most hosts, automation costs less than one fine.

Final Thoughts

Portugal takes short-term rental compliance seriously.
Ignoring SIBA—or relying on memory and manual steps—is risky and expensive.

If you host regularly, compliance is not paperwork—it’s protection.

Avoid fines.
Protect your AL licence.
Make compliance boring and automatic.