Daňové identifikační číslo

Czech Republic VAT number format

Czech Republic VAT numbers (DIČ) are written as CZ + 8, 9 or 10 digits, for example CZ25123891.

Country code: CZ
Format: CZ + 8, 9 or 10 digits
Example: CZ25123891
Local name: Daňové identifikační číslo
Register: VIES (EU)
Standard VAT rate: 21%

Regular expression

^CZ\d{8,10}$

Checks the format only. The validator below also checks the check digit where the number has one it can compute.

Check a Czech Republic VAT number

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

How Czech Republic VAT numbers are built

CZ followed by 8 digits for legal entities (their IČO company number), or 9 or 10 digits for individuals (derived from the birth number) and a few special cases.

Check digit

8-digit numbers end with a weighted modulo-11 check digit, which the validator checks. For 9- and 10-digit numbers it checks the structure only.

Common mistakes

DIČ is the general Czech tax ID; only the DIČ of VAT payers is 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 Financial Administration (Finanční správa), and VIES asks that register for you. Where Czech Republic shares them, VIES also returns the registered name and address.

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

Check Czech Republic VAT numbers by API

curl "https://api.vatcheckapi.com/v2/check?vat_number=CZ25123891" -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 Czech Republic provides them.

Frequently asked questions

What does a Czech Republic VAT number look like?

CZ followed by 8 digits for legal entities (their IČO company number), or 9 or 10 digits for individuals (derived from the birth number) and a few special cases. The local name is Daňové identifikační číslo (DIČ), for example CZ25123891.

How do I check a Czech Republic 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 Czech Republic VAT numbers have a check digit?

8-digit numbers end with a weighted modulo-11 check digit, which the validator checks. For 9- and 10-digit numbers it checks the structure only.

What is the most common mistake with Czech Republic VAT numbers?

DIČ is the general Czech tax ID; only the DIČ of VAT payers is valid in VIES.

What is the VAT rate in Czech Republic?

The standard rate is 21%. See VAT rates in Czech Republic 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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