Field help:
Business identification number
Business identification number
Business identification number
Business identification number
Please enter the business identification number (Wirtschafts-Identifikationsnummer) that was assigned to you by the Federal Central Tax Office (BZSt) for your rental or leasing activities.
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.
- This is followed by a hyphen.
- A 5-digit distinguishing number follows at the end.
Example of a correct W-IdNr.: DE232637828-12345
The W-IdNr. is issued to all economic operators, in particular:
- Natural persons who carry out rental or leasing activities,
- Legal persons (e.g. companies),
- Personal associations (e.g. communities of owners).
The W-IdNr. adds to the already existing identification numbers such as the tax number and the personal tax identification number (IdNr.), which continue to retain their function. It serves to simplify administration and to improve the exchange of data between authorities. The tax number must continue to be used on all tax forms.
Further information about the W-IdNr. can be found on the Federal Central Tax Office website at www.bzst.de/widnr.
