What is VAT ID (USt-IdNr.)?
The USt-IdNr. (VAT identification number) identifies you for EU VAT purposes — typical for intra-EU B2B services and reverse-charge invoices.
Apply via the Federal Central Tax Office (BZSt). Reverse-charge invoices often show both your and the customer’s VAT IDs.
General information only — not legal or tax advice. Tax and e-invoice rules can change; the applicable laws control (e.g. § 19 UStG, § 14 UStG). Confirm with a tax advisor or lawyer if unsure.