What is the Slovenia VAT number regex pattern?

The regex pattern to validate Slovenia DDV numbers is: ^SI\d{8}$. Test against the uppercase number. Always follow with a VIES check to confirm the number is currently active.

Slovenia VAT Numbers

Q: What is the Slovenia VAT number format?

Slovenia VAT numbers follow the format: SI + 8 digits. Example: SI12345678. VAT numbers are not case-sensitive — lowercase input is automatically normalised.

Q: What is the standard VAT rate in Slovenia?

The standard DDV rate in Slovenia is 22%. Reduced rates: 5%, 9.5%.

Q: How do I validate a Slovenia VAT number programmatically?

Send a GET request to https://api.vatnode.dev/v1/vat/{vatId} with your Authorization: Bearer header. The API checks the number against the official EU VIES database and returns a JSON response with a valid field (boolean), company name, address, and current DDV rates. Free plan available — 100 requests/month, no credit card required.

Q: What does DDV stand for in Slovenia?

DDV stands for Davek na dodano vrednost — the Slovenia name for Value Added Tax (VAT).

Format, rates & examples

Everything you need to know about Davek na dodano vrednost (DDV) numbers in Slovenia — format rules, current rates, and real company examples you can verify against VIES.

EU Member StateDDV — Davek na dodano vrednostEUR

VAT Number Format

Structure

SI + 8 digits

Example format

SI12345678

Regex

^SI\d{8}$

VAT numbers are not case-sensitive — lowercase input is automatically normalised.

Current VAT Rates

Standard

22%

Reduced

9.5%

Rates from EU Commission TEDB · Updated 2026-05-12

What we return for Slovenia

VIES validation (valid / not valid)
Company name & address
National registry ID
Founded date
Legal form
Industry
Works if VIES is down

See the full coverage table for all 27 EU member states + Northern Ireland →

Famous Slovenia VAT Numbers

Krka d.d., Novo Mesto

SI82646716

Slovenian pharmaceutical company

Verify →

NLB d.d.

SI91132550

Slovenia's largest bank

Verify →

Telekom Slovenije d.d.

SI98511734

Slovenian incumbent telecom operator

Verify →

Mercator d.o.o.

SI45884595

Slovenian food retail chain

Verify →

Petrol d.d.

SI80267432

Slovenian energy and fuel retail company

Verify →

Zavarovalnica Triglav d.d.

SI80040306

Slovenia's largest insurance group, listed on LJSE

Verify →

Check a Slovenia VAT Number

Enter a DDV number starting with SI to verify it against the official VIES database.

Format: SI + 8 digits

Example:

Slovenia SI VAT — rates & validation via API

Get Slovenia VAT rates via API — free, no key

No API key required

Request

curl "https://api.vatnode.dev/v1/rates/SI"

Response200 OK

{
  "countryCode": "SI",
  "countryName": "Slovenia",
  "vatName": "Davek na dodano vrednost",
  "vatAbbr": "DDV",
  "standardRate": 22,
  "reducedRates": [
    9.5,
    5
  ],
  "superReducedRate": null,
  "parkingRate": null,
  "vatNumberFormat": "SI + 8 digits",
  "vatNumberPattern": "^SI\\d{8}$",
  "updatedAt": "2026-05-12"
}

View full rates API reference →

Get Slovenia VAT rates via package — offline, no HTTP

eu-vat-rates-data

Request

# npm install eu-vat-rates-data
import { getRate } from 'eu-vat-rates-data'

const rate = getRate('SI')
console.log(rate.standard) // SI standard VAT rate

getRate() result200 OK

{
  "country": "Slovenia",
  "currency": "EUR",
  "eu_member": true,
  "vat_name": "Davek na dodano vrednost",
  "vat_abbr": "DDV",
  "standard": 22,
  "reduced": [
    5,
    9.5
  ],
  "super_reduced": null,
  "parking": null,
  "format": "SI + 8 digits",
  "pattern": "^SI\\d{8}$"
}

View package on GitHub →

Validate Slovenia SI VAT numbers

Requires API key

Request

curl "https://api.vatnode.dev/v1/vat/SI82646716" \
  -H "Authorization: Bearer YOUR_API_KEY"

Response200 OK

{
  "valid": true,
  "vatId": "SI82646716",
  "countryCode": "SI",
  "companyName": "Krka d.d., Novo Mesto",
  "companyAddress": null,
  "companyRegistrationDate": null,
  "companyForm": null,
  "industryDescription": null,
  "registryCode": null,
  "registryCodeName": null,
  "verifiedAt": "2026-04-25T12:00:00.000Z",
  "checkId": "019dc41e-d64d-7255-8ed7-cf5443103cd8",
  "countryName": "Slovenia",
  "countryVat": {
    "vatName": "Davek na dodano vrednost",
    "vatAbbr": "DDV",
    "currency": "EUR",
    "standardRate": 22,
    "reducedRates": [
      9.5,
      5
    ],
    "superReducedRate": null,
    "parkingRate": null,
    "vatNumberFormat": "SI + 8 digits",
    "vatNumberPattern": "^SI\\d{8}$",
    "countryVatUpdatedAt": "2026-05-12"
  },
  "consultationNumber": null
}

View full API response schema →

Frequently Asked Questions

What is the VAT number format in Slovenia?▾

VAT numbers in Slovenia follow the format: SI + 8 digits. Example: SI12345678. VAT numbers are not case-sensitive — lowercase input is automatically normalised.

What is the VAT number regex pattern in Slovenia?▾

Use this regular expression to validate VAT numbers in Slovenia DDV number format locally:

^SI\d{8}$

Test against the uppercase number. Format validation catches typos locally — always follow with a VIES check to confirm the number is active.

What is the standard DDV rate in Slovenia?▾

The standard DDV rate in Slovenia is 22%. Reduced rates: 5%, 9.5%. Rates are sourced from the EU Commission TEDB and updated daily.

How do I validate a VAT number in Slovenia programmatically?▾

Send a GET request to https://api.vatnode.dev/v1/vat/{vatId} with your Authorization: Bearer header. The API checks the number against the official EU VIES database and returns a JSON response with a valid field, company name, address, and current DDV rates. Free plan available — 100 requests/month, no credit card required.

What does DDV stand for in Slovenia?▾

DDV stands for Davek na dodano vrednost — the Slovenia name for Value Added Tax (VAT). It appears on Slovenia invoices and tax documents.

Validate Slovenia VAT numbers in your app

Use the vatnode API to automate DDV validation in your invoicing or checkout flow. Free plan available, no credit card required.

Get API Key View Quickstart