What is the Steuernummer?

The tax number (Steuernummer) is a unique number for businesses and freelancers. It’s a 10 or 11 digit number, and has the format “12/345/67890”. It’s sometimes written as “3012034567890”, where the first two digits are the number of your Bundesland.1

You obtain this number when you submit the Fragebogen zur steuerlichen Erfassung to the tax office (Finanzamt). The Steuernummer is not the same as a tax ID (Steueridentifikationsnummer) or VAT number (Umsatzsteuernummer).

Your Steuernummer is not private. It should appear on your invoices, and in your Impressum. If you move to a different area, your Steuernummer will change.

How to find your Steuernummer

Sources and footnotes
  1. Wikipedia, steuererklaerung.de