If you run a business and start cooperating with contractors from the European Union, the topic of an EU VAT number appears almost immediately. Without it, you cannot correctly issue an intra-Community invoice or settle tax in accordance with the regulations.
Contrary to appearances, this is not a complicated issue—provided you understand the basics and know where to check a specific number. Below you will find a practical guide: what an EU VAT number is, how to obtain it, and how to verify a contractor to avoid tax problems.
Key information from the article:
- The EU VAT number is an extended NIP that enables settlement of transactions within the European Union.
- The European NIP (EU NIP) in Poland has the format PL + the entrepreneur’s NIP.
- VAT ID (id VAT number) is required for sales and purchases between companies from different EU countries.
- Checking the EU NIP is done through the VIES system and is crucial for transaction security.
- EU VAT verification protects you from tax errors and potential penalties.
What does an EU VAT number mean and when is it actually needed?
A VAT number is a tax identifier used in transactions between companies within the European Union. The EU tax identification number (European NIP) is your domestic NIP preceded by a country code.
If you sell or purchase services or goods from a company in another EU country, you need this number. It allows the application of the so-called reverse charge mechanism, meaning VAT is settled in the buyer’s country.
Example: You have a company in Poland and issue an invoice to a client in Germany. If both parties have an active EU VAT number, the invoice is issued without VAT, and the tax obligation shifts to the contractor.
What does an EU NIP look like and how does it differ from a regular NIP?
An EU NIP is a standard NIP with a country prefix, e.g. PL1234567890. EU VAT numbers have different formats depending on the country, but they always include a country code.
This means:
- Poland: PL + NIP
- Germany: DE + number
- France: FR + identifier
The difference is purely formal but very important—without the prefix, you are not treated as an EU VAT taxpayer.
Pro tip: If you include only the NIP without the prefix on an invoice, the contractor’s accounting system may reject it.
How to obtain an EU VAT number in Poland and how long does it take?
You obtain an EU VAT number by submitting the VAT-R registration form to the tax office.
EU VAT numbers are usually activated within a few days after submission. You do not need to start a new business or obtain a new number—you simply extend your taxpayer status.
Step by step:
- complete the VAT-R form,
- indicate registration for intra-Community transactions,
- submit the document (online or at the office),
- wait for confirmation.
In practice, most companies receive activation within 1–3 business days.
How to check a contractor’s EU VAT number to avoid problems?
The easiest way is through the VIES system, the EU database of VAT taxpayers. Checking the EU VAT number is essential for every B2B transaction in the EU. This is a critical step—if the contractor does not have an active VAT number, you cannot apply the 0% rate.
How to do it:
- go to the VIES system,
- enter the contractor’s number,
- select the country,
- check the status.
You receive the result immediately—active or inactive.
Good to know: Take a screenshot or save the confirmation. This is your proof in case of an audit.
What does EU VAT verification involve and what does the result mean?
EU VAT verification means checking whether a given VAT ID number is active in the VIES system. This provides clear information on whether you can apply VAT-free settlement.
The result is binary:
- active → you can issue an invoice without VAT,
- inactive → you must treat the transaction as domestic and add VAT.
Example: You have a client from the Czech Republic. The system shows “invalid”. In this case, you add VAT according to Polish rates.
Is EU VAT verification mandatory and what are the consequences of not doing it?
EU VAT verification is not formally mandatory, but failing to do it can have serious consequences.
It protects you from having to pay overdue tax. If you issue an invoice without VAT and the contractor was not active, the tax office may require you to pay VAT yourself.
Risks:
- paying additional tax,
- interest,
- problems during audits.
Are EU NIP and VAT ID the same?
Yes—they are different names for the same identifier. The differences are only linguistic:
- in Poland: “NIP UE”,
- in the EU: “VAT ID”,
- internationally: “VAT ID number”.
When do you need an EU VAT number?
It is required for B2B transactions within the EU.
- sale to an EU company → YES
- purchase from EU → YES
- sale to a private individual → depends (e.g. OSS)
How often should you check an EU VAT number?
Before every transaction. A single check does not guarantee the number is still active. Status may change at any time.
Pro tip: For regular cooperation, check monthly or before each major invoice.
FAQ
Do you need to renew an EU VAT number?
No—it remains active as long as you operate and are a VAT taxpayer.
Can you have an EU VAT number without being a VAT taxpayer?
No.
Does VAT ID work outside the EU?
No.
What if the contractor’s number is inactive?
Treat the transaction as domestic and charge VAT.