Day 1 to day 30 is one dependency chain: commune → police check → national number → eID → bank, health fund and itsme — and in all three regions, an integration clock starts running too.
Overview
Your first month in Belgium is dominated by one statutory deadline and the chain it triggers. Within 8 working days of arrival you must report to the town hall of your commune; the neighbourhood police officer then verifies your address; a positive check puts you in the foreigners' register and produces your national register number; and that number unlocks the biometric residence card, payroll, the compulsory health fund (ziekenfonds/mutualité), banking and the itsme digital ID. In parallel, quieter clocks start: single-permit holders' employers track salary-threshold compliance from day one; Flanders' inburgering duty, Wallonia's parcours d'intégration (attestation within 18 months) and Brussels' mandatory welcome programme all measure their deadlines from your registration; and your visa D supporting documents (criminal record, medical certificate) were only valid 6 months, so renewals and follow-up filings should be diarised immediately. The sequencing below assumes a long-stay arrival (single permit, Blue Card, family reunification or study). Verified against ibz.be, dofi.ibz.be, settlinginbelgium.be, integratie-inburgering.be and wallonie.be as of June 2026.
Week 1 — The Statutory Deadline
- Day 1–8 (working days): report to the commune. Go to the population/foreigners' desk of the municipality where you live with passport + visa D, lease, and your legalised, translated civil-status documents. Long-stay arrivals are set on the path to the foreigners' register; the commune logs the date — this deadline is law, not advice.
- Make the address yours: Put your name on the letterbox and doorbell the day you move in. The police residence check fails on unmarked addresses, and a failed check stalls everything downstream.
- Open the banking conversation: Major banks open accounts on a passport and proof of address; doing this in week 1 means your IBAN exists before your first payroll cut-off. You have a right to a basic payment account as a legal resident if refused.
- Employer admin: Give your employer your passport data and, if you don't yet have a national register number, they can operate temporarily on a BIS number via BelgianIDpro. Confirm who is tracking your single-permit conditions (salary threshold, function) from day one.
- Keep every receipt: The commune's proof of declaration is your evidence of timely compliance — keep it with your passport until your residence card arrives.
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See Paid Plans →Frequently Asked Questions
What's the single most important thing to do in my first week in Belgium?
Report to your commune within 8 working days of arrival — everything else depends on it. Bring your passport with visa D, your lease, and legalised, translated civil-status documents. This declaration opens your file, triggers the police residence check, and starts the sequence that produces your national register number and residence card. Put your name on your letterbox the same day so the police check succeeds first time. Miss the deadline and you risk complications with your permit, delayed payroll identification, no health-fund enrolment and a stalled bank file — the Belgian system has no workaround that skips the commune.
Can I work before my residence card is physically issued?
Yes — your right to work flows from the positive single-permit decision (Annex 46/47) and your legal residence status, not from the plastic card itself. Employers identify you in payroll either with your national register number once the commune registers you or, before that, with a BIS number requested via BelgianIDpro. What you must not skip is the commune declaration within 8 working days and the rest of the registration chain, because prolonged failure to register undermines the residence side of your permit. Keep the visa D, the decision annex and the commune's proof of declaration together as your interim evidence of status.
When does Belgian health insurance actually start covering me?
When your ziekenfonds/mutualité enrolment is complete — not on arrival, and not automatically. You need your national register number and proof of employment or social-security contributions, which in practice puts enrolment in weeks 2–4 for most arrivals. Coverage through the compulsory scheme then reimburses the statutory share of doctors, prescriptions and hospital care. Bridge the gap with travel or expat insurance (proof of all-risk cover was a condition of your single-permit file anyway). Posted workers who remain in their home social-security system cannot join a mutualité and need private cover for the whole posting. Families enrol together — register spouse and children as dependants at the same time.
Which integration programme applies to me and how urgent is it in month one?
It depends entirely on your region of residence, and month one is when you find out. In Flanders, most newly arrived non-EU adults are inburgeringsplichtig: register with the Agentschap Integratie en Inburgering, sign the integration contract, and work towards Dutch A2 plus the civic-orientation test — with fees per course and test since September 2023. In Wallonia, you must obtain the parcours d'intégration attestation within 18 months of your residence-permit order: welcome module, 60 hours of citizenship training, French courses (400+ hours) if your level requires. In Brussels, registration with a BAPA or the Dutch-track agency is due within 6 months of notification, completion within 18; fines run €100–€2,500. Exemptions exist (some work-permit categories, EU nationals) — verify your status in writing rather than assuming.
What is itsme and why does everyone keep mentioning it?
itsme is Belgium's ubiquitous digital-identity app — the login for tax (MyMinfin), health-fund portals, eBox (official digital mail, including single-permit correspondence), pensions, commune e-counters and most banks. You activate it either with your electronic residence card plus a card reader, or through a participating Belgian bank's credentials, which is why it lands at the end of your first-month chain: it needs the eID or the bank account that themselves need your registration. Once active, it replaces card readers for daily use. Activate eBox at the same time and check it weekly — missing an official digital letter does not extend any deadline.
What deadlines beyond the first month should I set reminders for right now?
Five worth diarising on day one. (1) Single-permit renewal: file at least 2 months, at most 6 months, before expiry — late filing after permit expiry is inadmissible and forces a fresh first application from abroad. (2) Your region's integration deadline: 18 months for the Walloon attestation and the Brussels programme; Flanders' contract milestones per your agreement. (3) Residence-card collection and any commune follow-up appointments. (4) Document expiry: criminal-record extracts and medical certificates are only valid 6 months, relevant for family members arriving later. (5) School registration windows for the next academic year, which in the big cities open early and close fast.