In force · BE
E-invoicing in Belgium.
B2B mandatory since 1 January 2026, over Peppol, no national CIUS.
The calendar
| Date | Who | What becomes mandatory |
|---|---|---|
| 2022-11-01 | Public buyers, contracts of EUR 215,000 and above | Receiving structured invoices compliant with EN 16931, phased by contract value. |
| 2026-01-01 | Every Belgian enterprise liable to VAT | Issuing and receiving structured electronic invoices between businesses. |
Verified on 2026-08-17 against European Commission, eInvoicing in Belgium, efacture.belgium.be, the official portal. Mandate calendars move, and several of these have moved once already. If you are reading this well after that date, check the source before acting on it, and tell us if it has changed.
How invoices actually move
Peppol, which Belgium treats as the primary network rather than one option among several. Mercurius is the central hub for invoices to public bodies and is aligned exclusively with the Peppol interoperability model.
What the document has to be
Peppol BIS Billing 3.0. Belgium publishes no national CIUS, which makes it one of the simplest mandates to target: a document that satisfies the European standard and the Peppol rules is enough.
What most summaries get wrong
- It is already in force. Belgium is often still described as upcoming in material written before 2026, and the obligation started on 1 January of this year.
- The absence of a national CIUS is the unusual part. Most mandates layer country rules on top of EN 16931; here the Peppol specification is the whole requirement, so a validator configured for Peppol BIS Billing 3.0 is configured for Belgium.
- The scope is VAT liability, not size. There is no turnover threshold phasing this in, unlike Germany and Poland.
Where we fit
InvoiceForge builds and checks the document: it generates an EN 16931 invoice, validates one against the rules a real validator reports, and reads one back into structured data. An agent can call it directly.
It does not transmit. Reaching Belgium means going through the network above, and that is a separate piece we would rather name than blur. You need both, and knowing which one you are missing is worth more than a page that implies one product does everything.
We are not affiliated with the European Commission, OpenPeppol, or any tax authority. The dates on this page come from the Commission's own country factsheets and, where one exists, the national portal linked above.