Formulaire C1 — Déclaration de la situation personnelle et familiale (ONEM)

What is ONEM form C1 (personal and family situation)?

The C1 is the ONEM (Office national de l'emploi / RVA) form on which an unemployed person declares their personal and family situation. You complete it when you apply for unemployment benefits, when you change payment body, and whenever something it asks about changes: your address, your household, your activities, other income, your bank account or your trade union dues.

Your household situation (living alone, with a family, or as a cohabitant) affects the amount of your benefits, so the form asks who you live with and what income they have. It also asks about studies and training, secondary activities and self-employment, pensions and other benefits, how you want to be paid, and for workers from outside the EEA, their residence permit and access to the labour market.

FileIt fills in ONEM's own PDF in French, as printed, and repeats every answer on all three copies: for the ONEM office, for the payment body and for you. You sign each copy and hand it to your payment body, your trade union's payment office or the CAPAC.

Who needs to fill out ONEM form C1 (personal and family situation)?

• Anyone applying for Belgian unemployment benefits, for the first time or after a break.
• Unemployed people changing payment body.
• Anyone already receiving benefits whose address, household, activities, income, bank account or union dues change.
• Temporarily unemployed workers (chômage temporaire), who fill in a shorter version: the family situation only if they follow sandwich training, and not the non-EEA section.

When to use ONEM form C1 (personal and family situation)

• When you apply for benefits, using the date from which you apply.
• As soon as anything you declared changes: the form says you must report every change to your payment body and can be sanctioned if you don't.
• When your payment body asks for a new C1.

What you need before you start

• Your national register number (NISS), from the back of your identity card.
• The names, relationships, dates of birth and gross monthly income of everyone you live with.
• Dates from which your situation applies or changed.
• Your IBAN (and BIC for a foreign account).
• Any forms the C1 refers you to, such as C1A, C1B, C1C, C46, C1-Partenaire or C1 Annexe REGIS, and copies of court decisions or permits.

What’s on ONEM form C1 (personal and family situation)

The 2024 edition has 6 pages. FileIt asks for it in 12 parts, and it is signed by Unemployed person (le chômeur):

1. My identity (mon identité)Unemployed person (le chômeur)
2. Why I am handing in this C1 (motifs d'introduction de ce formulaire C1)Unemployed person (le chômeur)
3. Date in the header of page 2Unemployed person (le chômeur)
4. My family situation (ma situation familiale)Unemployed person (le chômeur)
5. My activities (mes activités)Unemployed person (le chômeur)
6. My income (mes revenus)Unemployed person (le chômeur)
7. How my benefits are paid (mode de paiement de mes allocations)Unemployed person (le chômeur)
8. My trade union dues (ma cotisation syndicale)Unemployed person (le chômeur)
9. Workers with a nationality from outside the EEA or Switzerland (note 27)Unemployed person (le chômeur)
10. Other (divers)Unemployed person (le chômeur)
11. My declaration (ma déclaration)Unemployed person (le chômeur)
12. Copies 2 and 3 (filled in for you)Unemployed person (le chômeur)

How to fill out ONEM form C1 (personal and family situation), step by step

1 My identity and why I hand in this C1

Give your NISS, name, date of birth, nationality and the address where you actually live, then tick every reason that applies: applying for benefits, changing payment body or declaring a change, with the date for each.

2 My family situation

Say whether you live alone, pay maintenance or are separated with part of your income paid to your spouse under a court decision, and list everyone you live with, with their income. Name any partner or other adult (not a child) who is financially dependent on you.

3 My activities and my income

Answer each question about studies, training, paid mandates, secondary activities, company directorships and self-employment, then about pensions, sickness or invalidity benefit, accident compensation and training benefits. Some Yes answers need an extra form (C1A, C1B, C1C or C46).

4 Payment, union dues and residence

Choose bank transfer (Belgian or foreign SEPA account) or a circular cheque, say whether union dues should be deducted if that has changed, and, for workers from outside the EEA or Switzerland, give your refugee, statelessness or residence permit status.

5 My declaration

Tick the three declarations (all three are required, or the application can't be processed), tick the documents you enclose, date and sign.

Common mistakes to avoid

• Leaving one of the three declaration boxes unticked.
• Forgetting someone in the household, or their income.
• Not reporting a change because benefits are already being paid.
• Answering Yes to a secondary activity or a pension without enclosing the C1A or C1B, or saying your earlier one is unchanged.
• Filling in the family situation for temporary unemployment when you don't follow sandwich training.

After you fill it out

Print the PDF, sign each of the three copies, and hand pages 1 to 4 to your payment body with any documents you enclose. Keep pages 5 and 6 for yourself.

Your payment body sends the C1 to ONEM.

Keep your copy in your FileIt vault so you can see what you last declared.

ONEM form C1 (personal and family situation): frequently asked questions

Official sources

• Blank form (PDF), published by Office national de l'emploi (ONEM / RVA): https://www.onem.be/file/cc73d96153bbd5448a56f19d925d05b1379c7f21/e0f37a5e04a197d7cf9f110148e9cd38354a6477/01-01-2024-c1-fr.pdf
• Official instructions and guidance: https://www.onem.be/formulaires-attestations/c1
• Edition shown on this page: Version 01.01.2024/830.10.000 (checked 2026-10-25).

FileIt is not affiliated with or endorsed by Office national de l'emploi (ONEM / RVA) or any government. This page explains the form in general terms and is not legal, tax or immigration advice. Always read the official instructions, and check that you are using the edition the recipient accepts. Page last reviewed 2026-10-25.

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