What is Rijksregisternummer / Numéro de Registre National?

The Rijksregisternummer (Dutch-speaking Belgium) or Numéro de Registre National (French-speaking Belgium) is the unique national identification number assigned to all Belgian citizens and residents. It is an 11-digit number formatted as YYMMDD-XXX-CK, where YYMMDD is the date of birth, XXX is a sequence number, and CK is a check digit. This number is the Belgian equivalent of the national insurance number in the UK, the social security number in the US, or the personal identity number in other European countries. It is the master identifier used across all government agencies, employers, banks, healthcare providers, insurance companies, and property registers.

For Belgian citizens, the Rijksregisternummer is issued automatically at birth and is printed on the national identity card (carte d'identité / identiteitskaart), the driver's license (permis de conduire / rijbewijs), and all official government documents. The number does not change during your lifetime, even if you marry, divorce, or change your name. For resident aliens (non-EU nationals with a residence permit), the number is assigned upon first registration with the local commune (municipal administration) and is printed on the residence permit (titre de séjour / verblijfstitel).

The Rijksregisternummer is required for nearly every legal transaction in Belgium. You need it to open a bank account, sign a rental contract, purchase property, register a vehicle, apply for insurance, file tax returns, or establish employment with an employer. Employers require it for payroll and tax withholding (precompte professionnel). Property notaires require it to verify your identity and register the property deed. Healthcare providers use it to manage patient records. The tax authority (SPF Finances / FOD Financiën) uses it to track income and administer personal income tax (impôt des personnes physiques / inkomstenbelasting).

For foreign nationals relocating to Belgium, obtaining a Rijksregisternummer is one of the first administrative steps. EU nationals register with the commune upon arrival and are issued the number within days. Non-EU nationals must first obtain a residence permit through the immigration process; once a permit is granted, they register with the commune and are issued the Rijksregisternummer. The process involves providing proof of identity (passport), proof of residence (lease agreement, utility bill, or proof of property purchase), and completing registration forms at the local commune office. The fee is typically small (€10–20).

Your Rijksregisternummer is considered sensitive personal information in Belgium and Europe (under GDPR). You are not required to disclose it to private sector companies except where legally required (banks, employers, notaires, insurance companies). It is printed on official identity documents but should be protected from casual disclosure. If you suspect your number has been compromised or misused for fraud, contact the local commune and the tax authority (SPF Finances) immediately to verify your records and report the issue.

Frequently Asked Questions

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