The CRUE: the registration at the câmara that's mandatory after three months

The first three months in Portugal you're free: as an EU citizen you may live there without arranging anything. That's exactly why almost nobody knows what's supposed to happen afterwards — no letter comes, nobody rings the bell. The law, however, is precise: if you stay longer than three months, you register within 30 days after those three months have passed.

The document you then get is the CRUE — Certificado de Registo de Cidadão da União Europeia. And unlike in most countries, you don't do that at an immigration office, but at the town hall of your place of residence: the câmara municipal. Appearing in person is mandatory — this isn't a form someone sends off for you.

What you bring

The statutory list is surprisingly short: a valid passport or identity card, and a declaration on your honour that you meet the conditions. Those conditions are the same as everywhere in the EU: you work in Portugal (employed or self-employed), or you have sufficient means of subsistence plus health insurance that covers you there, or you study there with means and insurance.

In practice municipalities sometimes ask for something extra — Porto, for example, wants to see proof that you really live in the municipality, such as your rental contract. So bring that, together with the evidence behind your declaration on honour: an employment contract, a bank certificate, your health policy or S1 registration. The declaration is yours, but whoever can't substantiate it is registering on thin ice — a false declaration carries its own, higher fine.

What it costs and how long it's valid

The fees are laid down in a national regulation: € 18 at the counter for adults from 25, € 15 through the digital channel, € 15 and € 12.50 respectively for whoever is younger than 25, and free for children up to one year old. The certificate is valid for five years (or shorter, if your stated stay is shorter).

After five years of uninterrupted legal residence you're entitled to permanent residence; you apply for the corresponding certificate at the migration agency AIMA — since July 2026 through their online portal.

The fine nobody knows about

Not registering is no trifle: the law sets a fine of € 400 to € 1,500 for missing the registration obligation (half that in case of negligence). It isn't actively hunted — but the offence is established from day 121, and you'll run into it by yourself the moment you need the certificate somewhere.

And you will need it: when converting your NIF to resident status, for healthcare, at many a counter that wants to see that you really live there. Don't count on it being done while you wait, either — under European rules the proof is supposed to be issued immediately, but the migration agency itself names a period that can run up to a month. So plan the application early in your fourth month, not in the week that something else is waiting on it.