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 Belgian Businesses (2026)
35-point GDPR checklist for Belgian businesses. APD/GBA enforcement, Wet 30 juli 2018, KBO/BCE number, cookie consent rules, Brussels bilingual obligations.
Cookie Banner Requirements 2026: What Actually Counts
Most cookie banners fail basic GDPR requirements. Here is what yours actually needs: reject buttons, no dark patterns, real consent.
EAA for Belgian Small Businesses: What Your Website Must Do Since 28 June 2025
Practical EAA guide for Belgian SMBs. Microenterprise exemption, KBO/BCE number, accessibility statement, Brussels bilingual obligations, WCAG 2.1 AA: all explained.
Check your website for Belgium requirements
Our scanner checks for Belgium-specific requirements automatically.