Can I move to Luxembourg without registering with my commune?
No — registering with the commune is compulsory, whatever your nationality. Anyone establishing their habitual residence in a Luxembourg commune must report to the population office on arrival. Failing to do so — like any late declaration — carries a fine of €25 to €250. The myth: "I am an EU citizen, I have three months to sort out the paperwork." Wrong, and it is the most expensive confusion of all. Two separate steps are stacked on top of each other: the declaration of arrival, due on arrival, and the registration certificate, due within 90 days. And for a third-country national the deadline is neither 8 nor 90 days: it is 3 DAYS.
📋 The rules
- A universal obligation: "Any person, whatever their nationality, who establishes their habitual residence in a Luxembourg commune must, on arrival, report their presence to the population office." There is no nationality exemption.
- Moving within the country: declare your arrival to the new commune within 8 days of moving in. The new commune itself handles deregistration from the old one.
- Third-country nationals: declaration of arrival within 3 DAYS of entering the territory, whatever the intended length of stay. This is the shortest and least known deadline in the whole system.
- EU nationals and equivalents: a declaration of arrival if they intend to stay more than 3 months; then, within 90 days of arriving, a registration certificate application at the commune.
- Fine: failing to declare — and equally any declaration made after the deadline — is punishable by a fine of €25 to €250 (amended law of 19 June 2013 on the identification of natural persons).
🔓 Exceptions
- Leaving the country: the logic reverses — the declaration of departure must be made BEFORE you leave, not within some period afterwards. Leaving without deregistering keeps you on the communal register and the national register.
- Communal autonomy: "the arrangements for declarations may vary from one commune to another". Documents, appointments and practical deadlines differ: ask your own commune, not only the national portal.
- Representation: the declaration may be made by a representative — a cohabiting spouse or registered partner, a guardian, a curator, a legal administrator or a special agent. An unemancipated minor is represented by a parent or guardian.
⚠️ Penalties & fines
A fine of €25 to €250. But the real cost is the domino effect: the declaration of arrival IS your entry on the communal register, which feeds the National Register of Natural Persons (RNPP). Without it: no residence certificate — required for a great many procedures; and the administrations, supposedly "automatically informed of your change of address through the RNPP", write to a stale address: appeal deadlines run without your knowing. For a third-country national, failing to declare undermines the lawfulness of the stay itself. The fine is trivial; reconstructing a tax and social-security position after the fact is not.
📎 Official sources
- Guichet.lu · official state portal (home page) — "Declaring a move to your commune of residence" →
- Legilux · official journal (home page) — amended law of 19 June 2013 on the identification of natural persons →
- City of Luxembourg (home page) — "Declaring your residence: arrival, change of address and departure" →
❓ Frequently asked
I am an EU citizen: do I really have 90 days?
No, the 90 days concern only the registration certificate, which is a second and separate step. The declaration of arrival at the population office is due as soon as you arrive in the commune.
What is the deadline for a third-country national?
Three days from entering the territory, whatever the intended length of stay. It is the shortest deadline in the system and the one most non-official websites simply get wrong.
I am moving within Luxembourg: what do I have to do?
You declare your arrival to your new commune within eight days of moving in. That commune then handles the deregistration from your old one, so you do not have to go back there.
What happens if I never register?
The fine runs from €25 to €250, and it applies to a merely late declaration as well. The real cost is elsewhere: without an entry in the national register you get no residence certificate and official post goes to a stale address.
And if I leave Luxembourg?
The declaration of departure must be made before you go, not afterwards: the logic of the deadlines is reversed. Leaving without deregistering keeps you on both the communal and the national register.
🔎 Common searches
What people search to land here:
- “register with commune luxembourg deadline”
- “new resident registration luxembourg”
- “declaration of arrival luxembourg commune”
- “eu citizen registration certificate luxembourg 90 days”
- “third country national 3 days registration luxembourg”
- “change of address commune luxembourg 8 days”