Why this matters
Many side businesses in Germany start under the Kleinunternehmerregelung (small business exemption) and assume a VAT ID will never be relevant. But as soon as marketplaces, EU services, or platform invoices come into play, the question tends to come up anyway.
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Create start planThe difference in plain terms
Your regular tax number (Steuernummer) is issued by your local tax office (Finanzamt). Depending on the German state, it typically looks something like this: 111 / 1111 / 11111. It is used for your tax returns, profit calculations, and all communication with the Finanzamt.
The VAT identification number (Umsatzsteuer-Identifikationsnummer, or USt-IdNr.) is a separate number issued by the Federal Central Tax Office (Bundeszentralamt für Steuern, BZSt). In Germany it always starts with DE, and it becomes relevant mainly for cross-border trade within the EU and for certain B2B platform or marketplace situations.
Important: operating under the Kleinunternehmerregelung does not automatically mean the VAT ID is irrelevant forever. You do not charge VAT on your invoices, but platforms, foreign service providers, or EU business transactions may still ask for a VAT ID (USt-IdNr.).
Why marketplaces often ask for the DE number
eBay, Amazon, Etsy, Facebook, Shopify apps, and advertising platforms often work with standardised seller and VAT processes. These systems do not always clearly distinguish between your Finanzamt tax number, your personal tax ID (Steuer-ID), and your VAT ID (USt-IdNr.).
When a platform asks for a VAT ID, Umsatzsteuer-ID, or a number starting with DE, it is normally not asking for your Finanzamt tax number — it is asking for your USt-IdNr.
This does not automatically mean you have to start charging VAT on your invoices. It simply means you should treat your tax registration and your platform requirements as two separate things.
How to apply for a VAT ID
When registering a new business, you can request a VAT ID directly in the tax registration questionnaire (Fragebogen zur steuerlichen Erfassung) submitted to your Finanzamt. Alternatively, you can apply later through the BZSt, provided your Finanzamt has already forwarded the necessary data to the BZSt.
If the BZSt application does not work, it is often because your VAT registration has not yet been properly received by the BZSt, or because certain master data at your Finanzamt needs to be updated first. In that case, your local Finanzamt is the better first point of contact.
For specific tax classification questions, you should consult your Finanzamt or a tax adviser (Steuerberater) — especially if you receive services from EU providers, import goods, use marketplaces, or have international customers.
What you should keep track of
Keep a clear distinction in your records between your personal tax ID (Steuer-ID), your Finanzamt tax number (Steuernummer), your VAT ID (USt-IdNr.), and potentially your future business identification number (Wirtschafts-Identifikationsnummer). This prevents confusion when platforms, banks, accounting tools, or tax advisers use different terms for different things.
Quick checklist
- Have you already received your Finanzamt tax number (Steuernummer)?
- Is a platform asking you for a VAT ID, USt-IdNr., or a DE number?
- Did you request a VAT ID in the tax registration questionnaire (Fragebogen zur steuerlichen Erfassung)?
- Do you use EU service providers, source goods from the EU, sell on marketplaces, or handle international B2B transactions?
- Is your Kleinunternehmerregelung (small business exemption) clearly documented on your invoices and in your bookkeeping?
Common mistakes
- Confusing your personal tax ID (Steuer-ID) with your business tax number (Steuernummer).
- Interpreting a platform's request for a VAT ID as an automatic obligation to switch to standard VAT taxation.
- Only applying for a VAT ID after your marketplace account is already blocked or flagged as incomplete.
- Entering a DE number somewhere without understanding whether it is actually the USt-IdNr. that is being asked for.
What this guide can and cannot do
This guide helps with
- give you a rough overview of your situation — for example, marketplace seller, Kleinunternehmer, EU service recipient, or domestic-only customer
- explain which number is most likely being asked for
- give you a checklist of which steps and contacts to check
This guide does not replace
- give you a binding assessment of your VAT registration status
- decide for you whether to stay under the Kleinunternehmerregelung or switch to standard VAT
- replace official information from the Finanzamt or the BZSt