Czech Republic VAT API — Validate Czech Republic VAT Numbers in Real Time
REST JSON endpoint for verifying Daň z přidané hodnoty (DPH) numbers against the official EU VIES register, with national registry fallback where available and a VIES consultation number on every successful check.
Why a Czech Republic-aware VAT API
In Czech Republic, VAT is known as Daň z přidané hodnoty (DPH) and the current standard rate is 21%. Every Czech Republic VAT number starts with the prefix CZ and follows a fixed structure issued by the Czech Republic tax authority. A generic VAT validator that ignores country-specific quirks will accept malformed input, miss the country's format rules, and fail to surface the local registry identifier that accountants and auditors actually need.
The vatnode API normalises DPH input, runs the official VIES check, falls back to the Czech Republic national company registry when VIES is unavailable, and returns a single JSON shape with the consultation number, company data where published, and the current Czech Republic VAT rates inline.
Czech Republic VAT number format
CZ + 8–10 digits^CZ\d{8,10}$Real Czech Republic VAT numbers you can validate right now:
- CZ45274649 — ČEZ a.s.
- CZ00177041 — Škoda Auto a.s.
- CZ60193336 — O2 Czech Republic a.s.
Validating Czech Republic VAT numbers — code examples
All three examples validate the same Czech Republic VAT number CZ45274649.
curl https://api.vatnode.dev/v1/vat/CZ45274649 \
-H "Authorization: Bearer YOUR_API_KEY"const res = await fetch(
'https://api.vatnode.dev/v1/vat/CZ45274649',
{ headers: { Authorization: `Bearer ${process.env.VATNODE_API_KEY}` } }
)
const data = await res.json()
console.log(data.valid, data.companyName, data.consultationNumber)import os, httpx
r = httpx.get(
"https://api.vatnode.dev/v1/vat/CZ45274649",
headers={"Authorization": f"Bearer {os.environ['VATNODE_API_KEY']}"},
)
data = r.json()
print(data["valid"], data["companyName"], data["consultationNumber"])What you get back
A successful response for a valid Czech Republic VAT number looks like this:
{
"valid": true,
"vatId": "CZ45274649",
"countryCode": "CZ",
"countryName": "Czech Republic",
"companyName": "ČEZ a.s.",
"consultationNumber": "WAPIAAAAXk7ZpY3o",
"source": "VIES",
"countryVat": {
"currency": "CZK",
"standardRate": 21,
"reducedRates": [12],
"superReducedRate": null,
"parkingRate": null
},
"verifiedAt": "2026-05-19T08:14:22Z"
}When the number is not registered, valid is false and company fields are null. The consultationNumber is the EU VIES requestIdentifier — the documented audit reference for reverse-charge "reasonable care" evidence.
Czech Republic VAT rates
vatnode returns the current Czech Republic DPH rates inline with every successful response. Today's rates (standard 21%, reduced 12%) are sourced from the European Commission TEDB feed and refreshed daily.
| Rate type | Value |
|---|---|
| Standard | 21% |
| Reduced | 12% |
VIES vs national fallback for Czech Republic
VIES is the primary data source for Czech Republic validation — it is the authoritative EU register and the only source that produces a consultation number. When VIES returns a transient error (timeout, MS_UNAVAILABLE, SERVICE_UNAVAILABLE), vatnode automatically queries the Czech Republic national company registry as a fallback so your checkout or invoicing pipeline keeps working.
The response includes a source field that tells you which system answered — VIES for the EU register, or the Czech Republic national-registry source code when the fallback ran.
Czech Republic is one of the EU countries where vatnode keeps validating during EU VIES outages via a direct national registry adapter. See coverage matrix for the full list.
Czech Republic VAT API — FAQ
Is the Czech Republic VAT number the same as the company registration number?
No. The Czech Republic DPH number is issued by the tax authority for VAT purposes; the national registry identifier is a separate ID issued by the company registry. vatnode returns both fields (registryCode + registryCodeName) for Czech Republic when the data is available.
How fast is Czech Republic VAT validation through vatnode?
Cached responses return in single-digit milliseconds. Live VIES lookups for Czech Republic typically complete in under one second; a 15-minute Redis cache is applied to identical VAT IDs.
Does the API work for Czech Republic sole traders and small businesses?
Yes. If a Czech Republic sole trader or small business is registered for DPH and listed in VIES, vatnode validates the number and returns the same response shape as for corporate entities. The valid field is true regardless of legal form.
What happens if EU VIES is down for Czech Republic?
vatnode falls back to the Czech Republic national registry adapter when VIES returns a transient error (timeout, MS_UNAVAILABLE). Validation keeps working from the national source; the response includes a source field so you can tell which system answered.
What is the consultation number returned for Czech Republic checks?
The consultationNumber is the VIES requestIdentifier — a unique reference issued by the EU VIES service that proves the check was performed against the official EU register on a specific date. It is the EU's documented mechanism for "reasonable care" evidence under the reverse-charge rules and is returned on every successful VIES validation, including Czech Republic.
See also
Start validating Czech Republic VAT numbers
100 validations per month on the free plan, no credit card required. REST JSON over HTTPS, VIES consultation number on every check, Czech Republic national registry fallback, EU-hosted by default.