Reverse-charge VAT in B2B trade: when to apply it, how to invoice and what to verify

• What reverse-charge VAT is and why it exists
• How to draft a reverse-charge invoice
• Verifying the buyer's VAT number through VIES
• Common errors and how to avoid them

Reverse-charge VAT is a procedural mechanism in which the buyer of a good or service is responsible for declaring the VAT due to their own tax authority, rather than the seller charging VAT and remitting it. The mechanism exists primarily to simplify cross-border transactions inside the European Union: without it, every EU seller would have to register for VAT in every country where they have a business customer, which would create enormous administrative friction.

Under the standard EU framework, intra-Community B2B supplies of services and goods between VAT-registered businesses are reverse-charged by default. The seller does not charge VAT on the invoice, and the buyer self-assesses VAT in their country at their domestic rate. The seller only needs to verify that the buyer has a valid VAT identification number issued in another EU member state, and to mention the reverse charge clearly on the invoice.

Some domestic transactions are also reverse-charged within a single country, typically for sectors with elevated fraud risk such as construction, electronics, scrap metal and certain telecommunications services. The list of in-scope domestic reverse-charge sectors varies by country and changes periodically through legislative reform.

A reverse-charge invoice differs from a standard VAT invoice in three key respects. First, no VAT amount is shown on the invoice; the line items are listed at their net price only. Second, both the seller's and the buyer's VAT identification numbers are stated explicitly. Third, the invoice carries a clear mention of the reverse-charge mechanism, typically using the standardised phrase Reverse charge or the country-specific equivalent (Steuerschuldnerschaft des Leistungsempfängers in Germany, autoliquidation in France, inversione contabile in Italy).

Beyond these three reverse-charge specifics, the invoice must contain all the standard EU mandatory invoice content: full supplier and buyer details, sequential invoice number, supply date, full description of goods or services and the net amount per line. Many invoicing software packages have a dedicated reverse-charge invoice template that handles all of this automatically once the buyer's VAT status is set correctly on their customer record.

Quarterly EC Sales Lists (also called Recapitulative Statements) must be filed by the seller to declare all intra-Community supplies, broken down by buyer's VAT identification number. Failing to file these statements can attract penalties even if the underlying transactions were correctly invoiced.

Before issuing a reverse-charge invoice, the seller must verify that the buyer's VAT identification number is valid and active in the buyer's home country. The European Commission operates the VIES (VAT Information Exchange System) at ec.europa.eu/taxation_customs/vies/, which provides a free real-time check against the official tax authority registers of every member state.

The verification result should be retained as part of the supporting documentation for the invoice. A simple screenshot of the VIES confirmation page, saved alongside the invoice in the accounting system, is sufficient evidence of the verification at the time of issue. Tax authorities increasingly request this evidence during audits and a missing verification can result in the seller becoming liable for the VAT that should have been declared by the buyer.

If the VIES check returns an invalid or inactive number, the reverse-charge mechanism cannot be used. The seller has two options: charge VAT at the relevant rate of the seller's country, or refuse to issue the invoice until the buyer obtains a valid VAT identification number. The first option creates an additional cost for the buyer that may strain the commercial relationship, so most experienced sellers ask for the buyer's VAT number at the offer stage and verify it before any commercial commitment.

The most common reverse-charge error is treating a B2C transaction (sale to a final consumer) as a B2B reverse-charged transaction because the buyer claims to be a business but does not provide a VAT number. The reverse-charge mechanism applies only when the buyer is a VAT-registered taxable person identified by a valid VAT number; without it, the transaction is B2C and the seller must charge VAT at the rate applicable to the destination country (subject to the OSS distance-selling rules).

The second common error is omitting the reverse-charge mention on the invoice itself. An invoice without the explicit reverse-charge phrase can be rejected by the buyer's tax authority, which then bills the buyer for the VAT plus penalties. The phrase is short and standardised; a missing line is one of the easiest audit findings to avoid.

The third common error is applying reverse charge to services that are excluded from the mechanism. Services connected to immovable property (such as construction work on a specific building or short-term hotel accommodation) are taxed where the property is located, not where the buyer is established, and reverse charge does not apply. A mixed contract that includes both reverse-chargeable services and property-linked services should be split for invoicing purposes to apply each rule correctly.