Field help: Business identification number

Enter the economic identification number (Wirtschafts-Identifikationsnummer) that was assigned to you by the Federal Central Tax Office (BZSt) for your self-employment.

The structure of the business identification number is as follows:

• It always begins with the prefix "DE".
• This is followed by 9 digits, whereby the ninth digit is always the check digit.
• After that, a hyphen is placed.
• A 5-digit distinguishing number follows at the end.

The W-IdNr. is issued to all economically active persons and organisations, in particular:

• Self-employed persons and freelancers,
• Legal entities (e.g. companies),
• Personal associations (e.g. companies, owners' associations).