Slovakia VAT number validator
Validate Slovakia (SK) VAT numbers using the official EU VIES database. Enter a VAT number below to verify company registration.
Checking VIES…
- Official European Commission VIES data
- Repeat lookups answered instantly
- Free, no sign-up
European Union guidance
Slovakia VAT number format
- Prefix
- SK
- Structure
- SK followed by the national identifier
The national part is a country-specific sequence of digits and, for some countries, letters.
Only national tax administrations issue VAT identification numbers. VIES confirms registration status but is not tax or legal advice.
European Commission guidance on VAT identification numbersVAT validation in Slovakia
Slovakia VAT numbers use the prefix SK followed by the registration number. You can enter the full number with or without the prefix — our tool detects the country automatically.
Slovakia applies a standard VAT rate of 23%. Use our Slovakia VAT calculator to calculate VAT amounts for Slovakia.
VAT validation API
Validate VAT numbers from your own software with a free JSON endpoint.
Endpoint
https://vat.businesspress.io/api/vat/validation/validate
No API key · JSON request body · 20 requests per minute
Try it live
POST /api/vat/validation/validate
The response will appear here.
Frequently asked questions
What is a VAT number?
A VAT identification number identifies a business registered for VAT in an EU member state. It is required for intra-community supplies and B2B invoicing across the EU.
How does VIES validation work?
VIES forwards your query to the national VAT database of the member state that issued the number and returns its registration status, together with the company name and address where the member state shares them.
Why should I validate VAT numbers?
Checking a customer's VAT number before you invoice lets you apply the reverse charge or zero-rate an intra-community supply with confidence, and gives you an audit trail for your tax authority.
How current are the results?
Results come from national tax administrations through VIES. A result is reused for up to 7 days to keep lookups fast, and the data source is shown with every result.
Can I validate VAT numbers through an API?
Yes. The free REST API supports single and batch validation. See the API section on this page for the endpoint and a live example.
Validation results come from the European Commission VIES database. Results are cached for speed, so confirm critical decisions with your national tax administration.