Written by Sumit Yadav
Belgium's B2B e-invoicing mandate becomes effective on January 1, 2026, applying to domestic transactions between VAT-registered businesses.
From January to March 2026, penalties will not be enforced for e-invoicing non-compliance, as long as businesses can show genuine efforts to implement compliant systems and processes.
The tolerance applies only to taxpayers who can demonstrate reasonable, timely, and documented actions toward compliance, such as system upgrades or onboarding with service providers.
Belgium's e-invoicing mandate is based on the Peppol BIS 3.0 standard, requiring structured electronic invoices instead of paper or standard PDF formats.
The transition-friendly approach gives companies valuable breathing room to test integrations, train teams, and stabilize invoice workflows before full enforcement begins.
