Cod de identificare fiscală

Romania VAT number format

Romania VAT numbers (CIF) are written as RO + 2 to 10 digits, for example RO18547290.

Country code: RO
Format: RO + 2 to 10 digits
Example: RO18547290
Local name: Cod de identificare fiscală
Register: VIES (EU)
Standard VAT rate: 21%

Regular expression

^RO\d{2,10}$

Checks the format only. The validator below also checks the check digit.

Check a Romania VAT number

Include the country prefix. EU numbers are checked against VIES in real time, UK numbers with a separate live check.

How Romania VAT numbers are built

RO followed by 2 to 10 digits, the CUI/CIF fiscal code, without leading zeros.

Check digit

The last digit is a check digit (weights 7, 5, 3, 2, 1, 7, 5, 3, 2 aligned to the right, times 10, modulo 11). The validator checks it.

Common mistakes

Every company has a CUI; only companies registered for VAT are valid in VIES.

Is the number registered?

A valid format and check digit only mean the number could exist. Whether it is currently registered for VAT is known to the National Agency for Fiscal Administration (ANAF), and VIES asks that register for you. Where Romania shares them, VIES also returns the registered name and address.

Check a Romania number with the validator above, in the VAT number checker, or up to 50 at once with the bulk VAT validator.

Check Romania VAT numbers by API

curl "https://api.vatcheckapi.com/v2/check?vat_number=RO18547290" -H "apikey: YOUR-API-KEY"

The response says whether the format and checksum are valid and whether the number is registered, with name and address where Romania provides them.

Frequently asked questions

What does a Romania VAT number look like?

RO followed by 2 to 10 digits, the CUI/CIF fiscal code, without leading zeros. The local name is Cod de identificare fiscală (CIF), for example RO18547290.

How do I check a Romania VAT number?

Enter it in the validator on this page. It checks the format and check digit and asks the EU's VIES system whether the number is registered, with company name and address where available. The vatcheckapi API does the same from your code.

Do Romania VAT numbers have a check digit?

The last digit is a check digit (weights 7, 5, 3, 2, 1, 7, 5, 3, 2 aligned to the right, times 10, modulo 11). The validator checks it.

What is the most common mistake with Romania VAT numbers?

Every company has a CUI; only companies registered for VAT are valid in VIES.

What is the VAT rate in Romania?

The standard rate is 21%. See VAT rates in Romania for reduced rates and a calculator.

VAT validation API

Validate VAT numbers in your app

vatcheckapi checks the format and checksum of EU and UK VAT numbers and confirms the registration live (VIES for EU numbers), with company name and address where the country provides them.

/v2/check documentation VAT number API All documentation

150 free validations every month. No credit card required.

GET https://api.vatcheckapi.com/v2/check?vat_number=LU26375245

{
  "country_code": "LU",
  "vat_number": "26375245",
  "format_valid": true,
  "checksum_valid": true,
  "registration_info": {
    "is_registered": true,
    "name": "AMAZON EUROPE CORE S.A R.L.",
    "address": "38, AVENUE JOHN F. KENNEDY\nL-1855  LUXEMBOURG",
    "address_parts": null,
    "checked_at": "2026-10-16T09:12:44.000000Z"
  },
  "registration_info_history": []
}

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