What Is a VAT ID and Why Does It Matter for EU Business Trade

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A VAT ID, also called a VAT number or VAT registration number, is a unique identifier issued by a national tax authority when a business registers for value-added tax. In the EU, it consists of a two-letter country prefix followed by a country-specific string, such as DE123456789, and appears on invoices and cross-border transactions. The number is distinct from a company registration number or a domestic tax number, each of which serves a different administrative purpose. For intra-EU business-to-business trade, both the supplier's and the buyer's VAT IDs typically appear on invoices, as their presence affects how VAT is applied to the transaction. When a valid buyer VAT ID is confirmed, sellers may avoid charging local VAT, with the buyer instead accounting for it through mechanisms such as zero-rated intra-Community supply or the reverse-charge system.

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