E-invoicing in Belgium
B2G transactions
E-invoicing is mandatory in Belgium for all business-to-government (B2G) transactions. Suppliers to public sector entities are required to submit e-invoices in a structured format that complies with the European Union (EU) e-invoicing standard EN 16931, and via the Peppol network.
B2B transactions
Belgium plans to implement mandatory e-invoicing for business-to-business (B2B) transactions from January 1, 2026. As with Belgium’s B2G mandate, businesses will be required to issue and receive structured e-invoices that comply with EN 16931, and via the Peppol network.
Businesses should prepare by adopting an e-invoicing system capable of:
Generating structured electronic invoices compliant with EN 16931 (Peppol BIS3)
Transmitting and receiving invoices through the Peppol network
Integrating e-invoicing processes into their accounting systems
Noncompliance penalties
Noncompliant e-invoices for B2G transactions will be rejected by the public sector entity recipient. When Belgium’s B2B mandate comes into effect, there are likely to be financial penalties for late, incorrect, or noncompliant e-invoices.
Other resources
Learn the basics, how it can help your business, and how to adapt.
Discover the Avalara solution for global e-invoicing compliance.
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