Belgian invoicing: automated intracom reverse-charge and form 723

In brief

Company Belgium's invoicing module automatically applies the VAT reverse-charge regime to eligible intra-Community invoices, validates the client's VAT number via the API before finalization, and generates the intra-Community listing (form 723) for the quarter in one click. Result: no forgotten regulatory mention, no wrong rate, and a ready-to-file declaration without manual compilation.

Belgian invoicing: five checks at once

Issuing a compliant invoice in Belgium means juggling five things at once: the client's VAT number, the right rate, the proper legal mention, continuous numbering, and — for intra-EU trade — the intra-Community listing. When those checks rely on manual review, one error eventually slips through, and it's usually the costliest one.

This April, our team shipped, inside the Company Belgium workspace, an invoicing module built for Belgian reality from day one, coupled to our VAT validation API. For an overview of Belgian electronic invoicing, see our guide on mandatory Peppol e-invoicing for Belgian SMEs from 2026.

Intracom reverse-charge handled automatically

When you add a customer from another EU member state with a valid VAT number, the engine automatically applies the reverse-charge regime on eligible invoices. The 0 % VAT is justified by a regulatory mention inserted line by line to the PDF, in the invoice language.

Under the hood, each VAT number is validated through POST /api/v2/vat/validate — normalization, Belgian format, plausibility. Until the number is recognized, the invoice stays in draft. This endpoint is part of the API v2 new features with Reference Data and webhooks.

Smart finalization lock

Finalizing an invoice isn't a casual action: it enters legal numbering and can no longer be edited. Hard gate: you cannot finalize an intra-Community invoice without a valid VAT number on the client. The error message points to exactly what's missing, and a shortcut button takes the user to the client page.

Form 723 (EU sales listing) in one click

Every quarter, Belgian companies invoicing inside the EU must file the 723 listing. The module generates the file in the correct format, aggregated per client per period, ready for submission.

On the API side

If you're building your own invoicing tool on top of Company Belgium, two endpoints are relevant:

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# Validate a Belgian (or EU) VAT number
curl -X POST https://companybelgium.be/api/v2/vat/validate \
  -H "X-API-Key: pk_live_..." \
  -H "X-API-Secret: sk_live_..." \
  -d '{"vatNumber": "BE 0200.065.765"}'

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# Fetch the full BCE record to pre-fill an invoice
curl https://companybelgium.be/api/v2/companies/0200065765 \
  -H "X-API-Key: pk_live_..." \
  -H "X-API-Secret: sk_live_..."

Who is it for?

Freelancers issuing their first intracom invoices, SMEs who want to lock down their quarterly filing, developers integrating VAT validation into an ERP or POS app. The flow is cohesive from estimate to cash-in, and compliant without users having to memorize the rules. For the general VAT rules, our VAT guide for Belgian businesses covers rates, regimes and filing obligations. For proper archiving of issued invoices, also read our guide on invoicing Belgian clients and legal invoice archiving.

Getting started

Enable the module from the "Invoicing" tab of your workspace. Import your clients (CSV or API), validate VAT numbers in one click, publish your first invoice in under five minutes. Existing users keep their numbering.