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Whistleblower law in Belgium #

Belgium implemented Directive (EU) 2019/1937 through the Act of 28 November 2022 for the private sector, alongside parallel public-sector and regional arrangements. For private companies, the main business trigger remains 50 workers, but Belgium’s structure is more fragmented than in unitary systems.

Applicable law #

Who must establish an internal channel #

Private legal entities with at least 50 workers must establish an internal reporting channel. Belgium also has public-sector and regional whistleblowing frameworks, so public bodies should check the regime that applies to their level of government. Entities in the financial-services and anti-money-laundering, transport-safety, and environmental sectors are in scope regardless of headcount.

Penalties #

No internal channel: a level-4 offence under the Social Penal Code (art. 133/1). A company faces a criminal fine of €24,000 to €576,000 (art. 101/1) or an administrative fine of €2,400 to €28,000 (art. 101). An employer, agent or representative who is an individual faces six months to three years in prison, a criminal fine of €4,800 to €56,000, or both. Every fine is raised by 2.5 décimes, or 25% (Act of 5 March 1952, art. 1; Social Penal Code, art. 102). Source: Social Penal Code
Obstruction, retaliation, abusive proceedings or breach of confidentiality: six months to three years in prison and/or a fine of €4,800 to €48,000. The Act sets €600 to €6,000, which art. 78 of the Criminal Code multiplies by eight. Source: Act of 28 November 2022, art. 33
Where a sector authority can impose its own sanctions, the Social Penal Code route does not apply (art. 33 §1).

Amounts as in force since 1 September 2026, when the new Criminal Code took effect.

External reporting authority #

Belgium does not operate with one single whistleblowing authority for every case. The Federal Ombudsman is a key federal external route, while sectoral and regional channels can also be relevant depending on the entity and the subject matter of the report.

Data protection authority #

For complaints about unlawful processing of whistleblower data, the relevant authority is the Belgian Data Protection Authority.

Key compliance points #

Belgium’s whistleblowing framework is legally fragmented across private-sector, federal public-sector and regional layers, so organisations should be explicit about which regime they are following.
The Federal Ombudsman explicitly accepts direct whistleblower reports and retaliation complaints.
Internal policies should make clear which external authority is appropriate for the organisation’s sector and constitutional level.

Official sources #

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