Website Rules in Belgium
Belgian websites must display their ondernemingsnummer (enterprise number) and comply with GDPR as enforced by the GBA. Bilingual requirements add extra complexity.
Data protection authority:
Gegevensbeschermingsautoriteit
(GBA)
Requirements
3
country-specific rules
Guides
3
guides available
Specific requirements for Belgium
Ondernemingsnummer
Belgian businesses must display their ondernemingsnummer (enterprise number) on their website. Format: BE 0XXX.XXX.XXX.
GBA enforcement
The GBA (Gegevensbeschermingsautoriteit) enforces GDPR in Belgium. They have been active in cookie consent enforcement, including a landmark case against IAB Europe.
Bilingual requirements
Businesses in Brussels or serving both Dutch and French-speaking communities may need to provide information in both languages.
Enforcement in Belgium
The Belgian GBA's 2022 ruling against IAB Europe — fining them €250,000 for the Transparency and Consent Framework — sent shockwaves through the entire EU ad-tech industry. The GBA has also fined a Belgian company €50,000 for sending marketing emails without valid consent, and regularly publishes enforcement decisions to increase awareness.
Official resources
Guides for Belgium
GDPR Compliance Checklist for Your Website (2026)
A practical GDPR checklist for small business websites. Check cookies, privacy policy, consent forms, and tracking scripts.
Do I Need a Cookie Banner? A Simple Decision Guide
Not sure if your website needs a cookie banner? This simple guide helps you decide based on what your website actually does.
KVK Number on Your Website: Is It Required?
Dutch businesses must display their KVK number on their website. Here is where to put it and what else is required.
Check your website for Belgium requirements
Our scanner checks for Belgium-specific requirements automatically.