Peppol adoption in Belgium has accelerated throughout 2025, with over 600,000 companies now registered [↗︎]. This number is halfway to the 1.2 million target, which represents the total number of Belgian businesses affected by the mandate. This growth is impressive, particularly when compared to the number of just over 1 million companies registered worldwide on the Peppol network about a year ago.
However, this metric also highlights that about half a million Belgian businesses will not be ready to meet the January 1, 2026 deadline. Therefore, the SPF Finances (Belgian tax authority) has decided to keep the mandate start date as planned while introducing a three-month grace period [↗︎] during which penalties will not apply, provided companies act in good faith and can demonstrate that they are in the process of implementing a solution.
This approach aim not to penalize companies that made the effort to be ready on time, while providing others extra time to complete their onboarding. With registration rates continuing to climb, most Belgian businesses are expected to be fully compliant before penalties come into effect.
For a full breakdown of how the Belgian mandate works, and how it leverages the Peppol network, check out our Belgium country profile.
