Obtain tax identification number
As a citizen in Germany, you automatically receive a tax identification number. You can request a new one online if you lose it.
Description
The tax identification number is used to identify the taxpayer in the taxation procedure. It means that tax returns, notifications and correspondence can always be clearly assigned to the respective taxpayer.
The tax identification number is a "non-speaking number". This means that neither personal data nor the responsible tax office can be read from it.
Every newborn child and all new citizens are automatically assigned a tax identification number when they first register in Germany. It remains valid for life and does not change when you move house or get married.
You can usually also find your tax identification number
- in your income tax assessment notice or
- on your income tax statement.
You can request your tax identification number via the input form of the Federal Central Tax Office (BZSt) if
- within 3 months of your first registration in Germany
- you have not yet received a tax identification number for your newborn child within 3 months of the birth
you have not yet received a letter with the tax identification number.
For data protection reasons, it is not possible to notify us by telephone or e-mail.
Online service
Re-notification of the tax identification number (IdNr) - input form
Description
Use this service online
Trust level
You need an account with password to use this online service (trust level: basic registration).
further information on the level of trust for online services
Identification
- electronic identification using national eID means – manual input
Contact person
Bundeszentralamt für Steuern (BZSt)
Address
address
Opening hours
Monday: 09:00 - 16:00 Tuesday: 09:00 - 16:00 Wednesday: 09:00 - 16:00 Thursday: 09:00 - 16:00 Friday: 09:00 - 16:00
Contact
Internet
Keywords
BZSt
Required documents
You do not need to submit any documents.
Prerequisites
All taxable persons in Germany receive a tax identification number.
Basis for legal action
Legal remedy
No legal remedies are provided.
Procedure
You will receive the tax identification number automatically by post to your registration address.
- As a taxable person in Germany, you will automatically receive a tax identification number.
- Children receive their tax identification number after birth.
- If you cannot find your tax identification number, you can request your tax identification number again online using the entry form on the website of the Federal Central Tax Office (BZSt).
- The form guides you step by step through the individual sections.
- You can also complete the form using the Virtual Online Information (ViOlA), a chatbot.
- Complete the form in full and submit it by clicking on the "Send" button.
- You will receive the tax identification number by post to your current registration address.
Deadlines
There is no deadline.
Processing time
If, in exceptional cases, the tax certificate has not been sent even after 3 months, it is advisable to submit a written request to the Federal Central Tax Office, stating the required data.
4 weeks (Durchschnittliche Bearbeitungsdauer bei Verwendung des Eingabeformulars)
4 to 8 weeks (Bearbeitungsdauer bei erstmaliger Wohnsitzanmeldung in Deutschland nach der Geburt)
Costs
There are no costs involved.
Notes (specifics)
There are no indications or specifics.
Further Information
Area of validity
Germany-wide
Official approval
Officially approved by Federal Ministry of Finance (BMF) on 30.07.2025
Keywords
Federal Central Tax Office