Field help: (2024) Business identification number

Please enter here the business identification number that was assigned to you by the Federal Central Tax Office (BZSt) specifically for your economic activity.

The structure of the business identification number is as follows:

• It always starts with the prefix "DE".
• This is followed by 9 digits, whereby the ninth digit is always the check digit.
• After that, a hyphen is used.
• Finally, there is a five-digit distinguishing number.

The W-IdNr. is issued to all economically active persons and entities, including:

• natural persons who generate income from renting and leasing,
• legal persons (e.g. corporations),
• associations of persons (e.g. owners' associations or companies).