Almost everything you will need in Belgium — a bank account, health insurance, a phone contract, a tax number, the itsme app that logs you into every public service — runs through one document: the electronic ID card. And the eID runs through one procedure: registering your address with the commune. This guide explains who has to register with the commune in Belgium, by when, what the police check involves, and the part nobody mentions: the apartment you choose decides whether registration is possible at all.
Who must register, and by when
The rules depend on your passport and on how long you are staying.
Situation | Deadline | What the commune issues |
|---|---|---|
EU/EEA/Swiss citizen, staying under 3 months | Report your presence within 10 days of arrival | Annex 3ter (declaration of presence) |
EU/EEA/Swiss citizen, staying over 3 months | Apply for registration within 3 months of arrival | Annex 19, then Annex 8 and an EU card after the police check |
Non-EU citizen arriving on a long-stay (D) visa | Report to the commune within 8 working days of arrival | Annex 15, then an A card after the police check |
Non-EU family member of an EU citizen | Within 3 months | Annex 19ter, then an F card |
Missing the deadline is an administrative offence with a fine of around EUR 200, but the practical cost is higher: nothing else can start until you are in the register. An assignment of five or six months is long enough to need the eID and short enough that a slow registration eats a third of it.
What the commune will ask for
Requirements vary slightly between communes, but the core list is stable:
a valid passport or national ID card
your signed lease, which is the proof of address
proof of health insurance
documents that match your status: an employment contract or secondment letter, proof of self-employment, proof of enrolment for students
passport photos, in most communes
The lease is the document that matters most and the one that goes wrong most often. The commune needs a contract in your name, for the address where you actually sleep, for a period that makes residence plausible. A hotel confirmation does not qualify. A short-stay booking in someone else's name does not qualify. If a colleague or relative is hosting you, most communes accept a signed declaration from them with a copy of their ID and proof of their own residence.
The police check
Registration in Belgium is not a paperwork exercise. After you file, a local police officer visits the address to confirm you live there. In practice this means your name on the doorbell and the letterbox, and a short conversation at the door. If you are out, the officer leaves a card asking you to make contact. In Brussels, officers may also check that energy contracts at the address are invoiced in your name, or at least that someone is genuinely living there.
Only after a positive report does the file move on. From that point the commune assigns your national number and orders the card. Budget two to eight weeks from filing to collecting the eID, longer in communes with heavy demand.
Why the apartment decides everything
Follow the chain backwards. No eID without a positive police check. No police check without an address where you can be found. No address without a lease that the commune accepts and a landlord who accepts being your registered address.
That last point is where furnished, short-term housing splits into two categories. Some providers explicitly forbid tenants from using the property as their official residence, because domiciliation has consequences for the owner. Others allow it. If you or your employee will be in Belgium for more than three months, ask this question before signing anything: "Can I register with the commune at this address?" Get the answer in writing. If the answer is no, the accommodation is fine for a project stay and useless for anything that needs an eID.
