What Is a Steueridentifikationsnummer?

The Steueridentifikationsnummer (often shortened to Steuer-ID or IdNr) is a unique 11-digit tax identification number that the German government assigns to every person who is registered in Germany. It was introduced in 2008 as a way to simplify the tax system and create a single, permanent identifier for every taxpayer.

Here's what makes the Steuer-ID special: it is assigned once and never changes. Whether you move from Berlin to Munich, change your name, or switch jobs ten times, your Steueridentifikationsnummer stays the same for your entire life. It is issued by the Bundeszentralamt für Steuern (BZSt) — the Federal Central Tax Office — and it follows you as long as you are in the German tax system.

A typical Steuer-ID looks like this: 12 345 678 901 (11 digits, no letters). You will find it printed on your tax assessment notices (Steuerbescheid), payslips, and the original letter from the BZSt.

Important distinction: The Steueridentifikationsnummer is not the same as the Steuernummer. They are two different numbers used for different purposes. We cover the full comparison below.

Why You Need Your Steuer-ID

Your Steueridentifikationsnummer is required in a surprising number of everyday situations in Germany. Here are the most important ones:

  • Employment — your employer needs your Steuer-ID to register you with the tax authorities and withhold the correct amount of income tax from your salary. Without it, they must apply the highest tax class (Steuerklasse 6), which means significantly more money is withheld from every paycheck.
  • Mini-jobs (450-euro jobs) — even for part-time work, your employer will ask for your Steuer-ID to handle tax reporting.
  • Opening a bank account — German banks are legally required to collect your Steuer-ID for tax reporting purposes (Kontrollmitteilungen). Some banks will let you open an account and submit it later, but many require it upfront.
  • Filing a tax return (Steuererklarung) — your Steuer-ID appears on every tax return you file. The tax office uses it to match your return to your records.
  • Claiming benefits — if you apply for Kindergeld (child benefit), BAfoG, or other government support, your Steuer-ID is typically required on the application forms.
  • Kirchensteuer (church tax) — your religious affiliation for church tax purposes is linked to your Steuer-ID in the tax system.

In short, the Steueridentifikationsnummer is one of the first numbers you will need after settling in Germany. It sits right alongside your Anmeldung certificate and health insurance card as an essential document for daily life.

How to Get Your Steueridentifikationsnummer

Here is the good news: you do not need to apply for your Steuer-ID. It is generated automatically.

The process works like this:

  1. Complete your Anmeldung — register your address at your local Burgeramt.
  2. The Burgeramt sends your data to the BZSt — this happens automatically in the background. You do not need to do anything.
  3. The BZSt generates your Steuer-ID and mails it to your registered address.
  4. You receive a letter containing your 11-digit Steueridentifikationsnummer. The letter typically arrives 2 to 4 weeks after your Anmeldung.

That is the entire process. There is no form to fill out, no online application, and no office to visit. Just complete your Anmeldung and wait for the letter.

Pro tip: If you have not completed your Anmeldung yet, that is your first step. Read our complete Anmeldung guide to make sure you have all the right documents and know how to book a Burgeramt appointment.

What If Your Steuer-ID Letter Does Not Arrive?

This is one of the most common problems international students face: the Steuer-ID letter simply never shows up. Before you panic, here is what to check and what to do.

Step 1: Wait at Least 4 Weeks

The official processing time is 2 to 4 weeks, but during busy periods (especially September/October when many students arrive), it can take longer. Do not start worrying until at least 4 full weeks have passed since your Anmeldung appointment.

Step 2: Check Your Mailbox

This catches an enormous number of people: Deutsche Post only delivers mail to mailboxes that have your name on them. If your name is not on the mailbox, the letter will be returned to the sender.

Mailbox rule: Make sure your full name (exactly as registered during Anmeldung) is clearly visible on your mailbox. If you live in a shared flat (WG), every resident's name needs to be on the mailbox. This is the number one reason Steuer-ID letters go missing.

Step 3: Request It Again

If 4 weeks have passed and your mailbox is properly labeled, you can request your Steueridentifikationsnummer through these channels:

  • Online: Visit formulare.bfinv.de and fill out the request form for a re-issue of your Steuer-ID. The BZSt will mail it to your registered address (takes another 2-4 weeks).
  • By phone: Call the BZSt hotline at +49 228 406-1240 (Monday to Friday, 8:00-16:00). They can verify your identity and confirm whether a Steuer-ID has been issued for you.
  • In person: Visit your local Finanzamt (tax office) with your passport and Meldebescheinigung. They can look up your Steuer-ID in the system and often provide it on the spot.

Pro tip: The online form and phone hotline can only send the Steuer-ID by postal mail for security reasons — they will never email it or give it over the phone. If you need it urgently, visiting the Finanzamt in person is your fastest option.

How to Find Your Steuer-ID If You Lost It

You received the letter, but now you cannot find it. This happens more often than you would think. Here is where to look before requesting a new one:

  • Old tax documents — your Steuer-ID appears on every Steuerbescheid (tax assessment notice) you have ever received.
  • Payslips (Gehaltsabrechnung) — your employer prints your Steuer-ID on every payslip. Check your most recent one.
  • Bank correspondence — some banks reference your Steuer-ID in account documents or annual tax statements (Jahressteuerbescheinigung).
  • Previous employer's records — if you had a job in Germany before, your former employer has your Steuer-ID on file. They may be able to share it with you.
  • Your ELStAM record — if you have an ELSTER account (the German electronic tax filing system), your Steuer-ID is stored in your profile.

If none of these sources work, request your Steuer-ID again using the methods described in the previous section. The BZSt will mail it to your current registered address.

Steuer-ID vs. Steuernummer — What Is the Difference?

This is one of the most common sources of confusion in the German tax system. The Steueridentifikationsnummer (Steuer-ID) and the Steuernummer are two completely different numbers. Here is how they compare:

Steuer-ID Steuernummer
Full name Steueridentifikationsnummer Steuernummer
Digits 11 digits 10-13 digits (varies by state)
Issued by Bundeszentralamt fur Steuern (federal) Your local Finanzamt (tax office)
Changes? Never — permanent for life Yes — changes if you move to a new tax district
When assigned Automatically after Anmeldung When you file your first tax return or register a business
Primary use Employment, banks, benefits Filing tax returns, communication with Finanzamt
Format example 12 345 678 901 12/345/67890

When your employer asks for your "tax ID," they almost always mean the Steuer-ID (the 11-digit one). When the Finanzamt writes to you about your tax return, they typically reference your Steuernummer. If you are ever unsure which one someone is asking for, clarify by asking: "Do you mean the 11-digit Steueridentifikationsnummer or my Steuernummer from the Finanzamt?"

For International Students: Special Tips

If you have just arrived in Germany to study, the Steuer-ID process is the same as for anyone else — but there are a few things worth knowing that are especially relevant to students:

Put Your Name on Your Mailbox Immediately

This cannot be stressed enough. If you are moving into a dorm room or a WG (shared flat), your name may not be on the mailbox yet. Add it on your very first day. Your Steuer-ID letter, along with other important government correspondence, will be returned to the sender if Deutsche Post cannot match the name on the envelope to a name on the mailbox.

Make sure the name matches exactly what you used on your Anmeldung form. If your passport says "Maria Garcia Lopez," do not write just "Maria" on the mailbox.

Your Employer May Ask Before It Arrives

If you start a working student job (Werkstudent) or a mini-job before your Steuer-ID letter arrives, your employer will ask for it. Here is what to do:

  • Explain the situation — tell your employer you have completed your Anmeldung and are waiting for the letter. Most employers are familiar with this delay.
  • Know the consequences — without your Steuer-ID, your employer will likely apply Steuerklasse 6 (the highest tax rate) to your paycheck. This means more tax is withheld temporarily.
  • Submit it as soon as it arrives — once you have the number, give it to your HR department immediately. They will update your tax class, and any excess tax withheld can be reclaimed when you file your annual tax return.

Pro tip: Do not let the Steuerklasse 6 scare you. The extra tax is not lost — it is simply withheld in advance. You will get it back when you file your Steuererklarung (tax return). Many students use tools like Wundertax or SteuerGo, which are available in English and make the process straightforward.

Already Had a Steuer-ID from a Previous Stay?

If you lived in Germany before (for example, a previous semester or internship) and already received a Steuer-ID, it is still valid. Remember, the Steueridentifikationsnummer never changes. You do not get a new one when you register again. Check your old documents or request it from the BZSt if you cannot find it.

Frequently Asked Questions

How long does it take to receive the Steuer-ID after Anmeldung?

Typically 2 to 4 weeks. In busy periods, it can take up to 6 weeks. If nothing arrives after 4 weeks, check your mailbox label and then request a re-issue from the BZSt.

Can I get my Steuer-ID online or by email?

No. For security reasons, the BZSt only sends the Steuer-ID by postal mail to your registered address. They will not share it via email, phone, or online portals. The only way to get it immediately is to visit your local Finanzamt in person with valid identification.

Do EU citizens also get a Steuer-ID?

Yes. Everyone who completes an Anmeldung in Germany receives a Steueridentifikationsnummer, regardless of nationality. This applies to EU citizens, non-EU nationals, and German citizens alike.

Can I work in Germany without a Steuer-ID?

Yes, but your employer will withhold tax at the highest rate (Steuerklasse 6) until you provide it. Once you submit your Steuer-ID, the correct tax class is applied. Any overpaid tax can be reclaimed through your annual tax return.

Is the Steuer-ID the same as the tax number on my payslip?

Your payslip may show both your Steuer-ID (11 digits, labeled "IdNr" or "Steuer-ID") and your Steuernummer. They are different numbers. Your employer primarily uses the Steuer-ID to communicate with the tax system on your behalf.

What happens to my Steuer-ID if I leave Germany?

Your Steueridentifikationsnummer remains valid even after you de-register (Abmeldung) and leave Germany. If you return to Germany years later and register again, you will receive the same Steuer-ID. It is assigned for life.

Need Help With Your Specific Situation?

Every case is a little different. Maybe your Steuer-ID letter never arrived and you have a job starting next week. Maybe you lived in Germany years ago and cannot find your old number. Maybe you are confused about which number your employer is actually asking for.

Whatever your question, hallostu can help you find the answer. Our AI assistant gives you verified answers sourced from German law and official government resources — with inline citations so you can trust every response.

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