Request information on the tax identification number

Do you need your tax identification number? In Hamburg, you can obtain it not only from the tax office, but also from the Hamburg Service on site.

Detailed description

The tax identification number (tax ID) is your personal, lifelong valid number, which allows the tax office to uniquely identify you in all tax matters.



For example, if you need to prove your tax ID to an authority or your employer, you can obtain written confirmation of your tax ID.

 

Information

Prerequisites

Her main residence is in Hamburg.

Documents required

  • Identification document (identity card or passport)

Please note

  • The Federal Central Tax Office (BZSt) is solely responsible for issuing/assigning a tax identification number (tax ID).
  • You can usually find your tax identification number on your most recent income tax assessment notice or wage tax statement. Your current employer also has the identification number for wage tax deduction.
  • The tax office also provides information (no assignment!) on the tax identification number.

Deadlines

none

Procedure

  • You can request the information either in person on site or in writing.
    • If you wish to submit the application in person, please arrange an appointment with the Hamburg Service office beforehand by telephone.
  • The relevant authority will review your request.
  • Your tax identification number will be provided to you.

Processing time

There is no legally mandated processing time.

Fees

There are no fees.

Legal remedies

No legal remedy is provided for.

Legal basis

Section 139a of the German Fiscal Code (AO)


https://www.gesetze-im-internet.de/ao_1977/__139a.html




Section 139b of the German Fiscal Code (AO)


https://www.gesetze-im-internet.de/ao_1977/__139b.html

Links on hamburg.de

Links on the Internet

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Last updated: 16.01.2026