Since 1 January 2026, businesses established in Belgium and registered for VAT must send and receive B2B invoices as structured e-invoices, with the Peppol network as the default channel. A tolerance period ran until 31 March 2026, and escalating fines apply for repeated non-compliance. Most coverage focuses on the invoicing software. The part that gets overlooked is upstream: an e-invoice is only as correct as the customer data it is built from. If your CRM holds wrong legal names, missing enterprise numbers or unvalidated VAT numbers, Peppol will surface those errors at the worst possible moment, when you try to get paid.
This article is about that upstream part: what sales operations should change in the CRM and in the quote-to-cash handoff. It is not tax advice; confirm your obligations with your accountant. If you run monday CRM and want the data model and integrations set up properly, that is part of our monday.com implementation service.
The key points, based on the Belgian rules and the official e-invoicing portal FAQ:
Belgium is early, not unusual. The EU’s VAT in the Digital Age (ViDA) package points to e-invoicing-based reporting for cross-border B2B transactions from 2030, so companies selling across the EU will face similar requirements.
Because the invoice inherits its data from the deal. Look at where each invoice field originates:
| Invoice data | Where it usually starts | What goes wrong |
|---|---|---|
| Legal entity name | CRM account | Trade name instead of legal name |
| VAT number | CRM account | Missing, mistyped or never validated |
| Enterprise number / Peppol ID | Often nowhere | Not captured at all |
| Billing address and contact | CRM account or contact | Outdated after a move or merger |
| Products, prices, discounts | Quote in the CRM | Manual retyping in the invoicing tool |
| Purchase order reference | Email thread | Lost, invoice rejected by the customer |
When invoices were PDFs, a human quietly fixed these things. With structured e-invoices, mismatches lead to rejected invoices and delayed payment. The fix belongs where the data is created: in the CRM, at the moment an account and a deal are set up.
For Belgian B2B customers, we recommend these fields as standard on the account (company) board:
Make the critical fields mandatory before a deal can move to the contract or won stage. That single rule prevents most downstream rejections.
monday CRM is excellent for accounts, deals, quotes and the follow-up work after a sale. For the legal invoice, the practical setup is to connect it to an accounting or invoicing tool that is Peppol-capable, rather than trying to make the CRM the invoicing engine.
A clean flow looks like this:
Integrations can be native, through a connector platform, or custom via the API, depending on the accounting tool. The principles are in our wiki on integrating monday.com with other platforms, and connected setups pay off beyond compliance: in the Carya case, a monday.com integration helped save around 900 emails a month.
Peppol quietly forces a conversation many companies have postponed: who owns customer master data? Our answer is simple. Sales owns creating it, finance owns the rules, and the CRM enforces them. If handoffs between sales, delivery and finance are already a pain point, read our guide on aligning sales, projects and operations.
The benefit goes beyond compliance. Once invoice status flows back into the CRM, you get a fuller view of the customer lifecycle: not only what was sold, but what was invoiced, paid and renewed.
If you are still building your CRM structure, start with our monday CRM implementation guide and our monday CRM approach.
Yes, for B2B invoices between VAT-registered businesses established in Belgium, since 1 January 2026.
Escalating fines are reported at 1,500, 3,000 and 5,000 euros for repeated infringements. Confirm with your accountant.
Use monday CRM for customer and deal data and send the legal invoice from a connected Peppol-capable invoicing tool.
Usually 0208 followed by the 10-digit enterprise number.
We review your account data and quote-to-cash flow, and set up monday CRM so invoices start from clean, validated data. Book a free intro call with Tryve.
Tryve is a monday.com platinum partner and helps companies with implementing state-of-the-art project management tools!
