What the Steuernummer actually is
While your Identifikationsnummer (IdNr.) is your permanent tax ID, the Steuernummer is a regional identifier assigned by your local tax office (Finanzamt). If you plan to freelance or start any kind of self employed work in Germany, getting this number is your first real encounter with local bureaucracy.
Who needs to request one?
Unlike your personal tax ID, which arrives automatically after your Anmeldung, you must actively apply for a Steuernummer. It is the primary tool authorities use to track your professional tax obligations. Without it, you do not exist in the eyes of the German tax system and you cannot operate legally.
Structure and Characteristics
A Steuernummer is a unique string of digits that looks different depending on your federal state (Bundesland). It can be up to 13 digits long, where the first few numbers identify the specific tax office responsible for your neighborhood.
A Regional and Temporary ID
One crucial thing to remember is that the Steuernummer is not permanent. It is strictly tied to where you live and work. If you move to a new city or even a different district in Berlin covered by a different Finanzamt, you will be issued a brand new number. This is the main difference from your IdNr, which stays with you for life regardless of your moves.
How to get your Steuernummer in Berlin
It will not appear on its own. To get it, you must submit the tax registration questionnaire (Fragebogen zur steuerlichen Erfassung). This is a standard requirement for freelancers, sole traders, and company founders.
Nowadays, you submit this form online via the ELSTER portal. Once sent, the Finanzamt reviews your application and mails the number to you. In Berlin, the wait is typically between 2 and 6 weeks, so do not leave it until the last minute.
Employees vs Freelancers
If you are strictly a salaried employee, you usually do not need a Steuernummer because your personal IdNr is enough. However, as soon as you start making money as a freelancer, it becomes mandatory. Even small side hustle activities require this specific registration.
What do you actually use it for?
For anyone running a business, the Steuernummer is the center of your professional world. You will need it for:
- Invoicing: You must include your Steuernummer on every invoice you send to German clients. If you leave it off, your invoices are not legally valid and clients might refuse to pay you.
- Tax Communication: This is your reference number for tax returns, VAT declarations, and every letter you send to the Finanzamt.
Steuernummer vs Identifikationsnummer
To keep it simple, the Identifikationsnummer identifies you as an individual nationwide, while the Steuernummer identifies your economic activity in a specific location. One follows you everywhere, while the other depends on what you are doing and where you reside. You will often be asked for both during administrative audits.
FAQ Steuernummer
Do I really need a Steuernummer?
Only if you are self employed or running a business. Regular employees only need their personal tax ID.
Is it the same as a VAT ID?
No. A Steuernummer is for domestic taxes. For business with other EU countries, you might also need a VAT ID, which is a separate request.
How long does it take to arrive?
Expect to wait 2 to 6 weeks for it to arrive by post, depending on the workload of your local office.
Think of your Steuernummer as the green light for your professional life. Given the wait times in Berlin, apply as soon as your Anmeldung is sorted and your business plan is ready. This way, you will be ready to bill your first clients without delays.
Struggling with German bureaucratic terms? Check our Glossary of Key Terms .
