Belgian VAT regimes and invoicing — standard, reverse charge, exempt, intra-Community

Why the VAT regime matters for every invoice

Belgian VAT is not a single flat rule applied uniformly. The regime governing a transaction determines whether you charge VAT, at which rate, whether the buyer must self-account, and which legal mentions must appear on the invoice. Under structured e-invoicing, the same logic maps into Peppol / UBL fields: tax categories, exemption codes, party identifiers, and line-level tax metadata must be consistent or validation fails and counterparties cannot book automatically.

This article explains the four regimes most often encountered in Belgian B2B invoicing and how they affect both human-readable invoices and structured Peppol messages.

Standard rate — the default case

When a VAT-liable Belgian business supplies goods or services subject to VAT at the standard, intermediate, or reduced rate (currently 21%, 12%, or 6% for common categories), the seller charges VAT, shows it separately on the invoice, and remits it to the Treasury.

On the invoice (human-readable):

• Seller and buyer identities, including Belgian enterprise number and VAT number where required
• Invoice date, supply date if different, continuous invoice number
• Description of goods or services, quantities, unit prices
• Taxable base per rate, VAT amount per rate, total payable
• Applicable VAT rate(s)

In Peppol structured data (EN 16931 / BIS Billing):

• Line items with ClassifiedTaxCategory using code S (standard rate) and the correct Percent
• TaxTotal and TaxSubtotal blocks that reconcile with line sums
• Seller PartyTaxScheme/CompanyID with Belgian VAT prefix BE

Most domestic B2B invoices under the 2026 structured mandate follow this pattern. Accounting software maps TaxSubtotal directly into purchase and sales VAT accounts.

Reverse charge and co-contractant (medecontractant)

In defined sectors — notably construction, certain goods (e.g. scrap, mobile phones under conditions), and other cases listed in Belgian VAT law — the buyer, not the seller, accounts for VAT. The invoice is issued without VAT charged by the supplier, but with an explicit mention that the customer is liable under the reverse charge or co-contractant mechanism (autoliquidation / medecontractant).

On the invoice:

• Clear statement that VAT is due by the customer (reverse charge / co-contractant)
• Reference to the legal basis where practice requires it
• Seller and buyer VAT numbers — the buyer's number is essential because they self-assess
• Taxable base shown; VAT line typically zero on the supplier's document

In Peppol structured data:

• ClassifiedTaxCategory code AE (VAT reverse charge) is typical
• TaxExemptionReason or TaxExemptionReasonCode may carry the legal reference (implementation varies; validators expect coherent category + reason)
• Buyer PartyTaxScheme/CompanyID must be present and valid for domestic reverse charge
• Line VAT amounts often zero on the supplier side, while TaxableAmount remains populated

Mismatch between PDF wording and structured tax category is a frequent source of rejections: if the PDF says "co-contractant" but lines use standard rate S, automated processing breaks.

Exempt supplies

Some activities are VAT-exempt (e.g. certain medical, educational, financial, or rental activities under specific conditions). Exempt businesses do not charge VAT on those supplies. Others may be partially exempt with allocation rules.

On the invoice:

• No VAT amount (or explicit indication of exemption)
• Mention of exemption where the law requires it (article or nature of exemption)
• For exempt small business (franchise / klein ondernemingsregime): specific wording that no VAT is charged due to exemption — distinct from reverse charge

In Peppol structured data:

• ClassifiedTaxCategory code E (exempt) or O (out of scope), depending on the nature of the supply
• TaxExemptionReason text or coded reason where applicable
• Rates often 0% with category E, not confused with zero-rated intra-Community

Exempt invoices still participate in structured e-invoicing when the mandate applies; the tax category signals that no input VAT deduction follows from the document alone.

Intra-Community supplies (within the EU)

When a Belgian VAT-liable business supplies goods (or certain services) B2B to a customer in another EU Member State with a valid VAT number, the supply may be intra-Community and zero-rated in Belgium, provided conditions are met (valid VIES number, proof of transport, reporting in the intra-Community listing).

On the invoice:

• Buyer's EU VAT number (not only local company ID)
• Wording such as "intra-Community supply" / "livraison intracommunautaire" / "intracommunautaire levering"
• Zero VAT on the invoice; taxable base stated
• Seller VAT number and often reference to Article 39bis or applicable provision

In Peppol structured data:

• ClassifiedTaxCategory code K (intra-Community supply) for goods is common
• Buyer identifier with country prefix (DE, FR, NL, etc.) in PartyTaxScheme/CompanyID
• TaxExemptionReason referencing intra-Community exemption
• Cross-border endpoint routing on Peppol uses the buyer's participant identifier in their country

Services have separate place-of-supply rules; not every cross-border B2B invoice is K.

Consistency checklist across regimes

Before sending on Peppol:

1. Align each line's tax category with the commercial reality
2. Ensure TaxTotal arithmetic matches lines
3. Populate buyer tax ID when reverse charge or intra-Community applies
4. Keep PDF or rendered view consistent with XML

Co-contractant (medecontractant)

Belgian mechanism where the customer, not the supplier, accounts for VAT on specific supplies (notably construction). The invoice must state this clearly and use the correct structured tax category.