Belgium B2B e-invoicing 2026 — your countdown checklist

From 1 January 2026, every VAT-registered Belgian business must send structured electronic invoices to its Belgian B2B customers over the PEPPOL network. A PDF emailed to a customer will no longer satisfy the legal requirement between Belgian taxable persons.

Here is a checklist you can work through now, so January is a non-event.

1. Confirm you're in scope

If you're a Belgian VAT-registered business invoicing other Belgian businesses, you're in. Sales to private consumers (B2C) and the small-business franchise have different rules — but even exempt businesses need to be able to receive e-invoices. See our full Belgium e-invoicing guide for the detail.

2. Get a PEPPOL participant ID

Your PEPPOL address is built from your KBO/BCE enterprise number. You register once through a certified access point — in Eurobillr that's Peppol → Register, and it usually completes within a day.

3. Clean up your client data

Structured invoices are validated against rules, so sloppy data fails fast. Before January:

• Make sure every business client has a valid VAT number.
• Check that addresses and enterprise numbers are complete.
• For intra-EU B2B, validate VAT numbers in VIES.

4. Test a real send

Don't wait for your first January invoice. Send one structured invoice now and watch the delivery status confirm. Our walkthrough — how to send your first PEPPOL invoice — takes about five minutes.

5. Decide how you'll receive

Inbound matters as much as outbound. Eurobillr drops vendor PEPPOL invoices straight into your expenses with a PDF rendition attached, so you're not chasing email attachments.

6. Tell your accountant

If a bookkeeper handles your VAT, loop them in now. Structured invoices make their job easier — the data lands clean — but they'll want to know where it lives.

The businesses that struggle in January will be the ones who left registration to the last week. Thirty minutes today removes the risk.

Want to check whether a specific customer can already receive PEPPOL invoices? Paste their VAT number into the free PEPPOL participant lookup.