What is Tax number (Steuernummer)?
The Steuernummer is the tax office identifier for your German tax file. Invoices usually show it (or your USt-IdNr.), depending on status and customer.
Compared with other IDs
- Steuernummer: national, from the Finanzamt
- USt-IdNr.: EU VAT identification number
- W-IdNr.: nationwide economic ID (check current rules)
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.