vatnode

Austria VAT API — Validate Austria VAT Numbers in Real Time

REST JSON endpoint for verifying Umsatzsteuer (USt) numbers against the official EU VIES register, with national registry fallback where available and a VIES consultation number once you set your own VAT as requester in dashboard Settings.

Get a free API key Austria VAT number format

Why an Austria-Aware VAT API

In Austria, VAT is known as Umsatzsteuer (USt) and the current standard rate is 20%. Every Austria VAT number starts with the prefix AT and follows a fixed structure issued by the Austrian 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 USt input, runs the official VIES check, and returns a single JSON shape with the consultation number, company data where published, and the current Austria VAT rates inline.

Austria VAT Number Format

Structure
ATU + 8 digits
Regex pattern
^ATU\d{8}$

Real Austria VAT numbers you can validate right now:

Validating Austria VAT Numbers — Code Examples

All three examples validate the same Austria VAT number ATU33864707. To receive a consultation number back, set your own VAT as requester once in dashboard Settings — then every call, including these, returns a consultation number automatically, with no extra parameters.

curl
curl 'https://api.vatnode.dev/v1/vat/ATU33864707' \
  -H "Authorization: Bearer YOUR_API_KEY"
Node.js (fetch)
const res = await fetch(
  'https://api.vatnode.dev/v1/vat/ATU33864707',
  { headers: { Authorization: `Bearer ${process.env.VATNODE_API_KEY}` } }
)
const data = await res.json()
console.log(data.valid, data.companyName, data.consultationNumber)
Python (httpx)
import os, httpx

r = httpx.get(
    "https://api.vatnode.dev/v1/vat/ATU33864707",
    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 AustriaVAT number, once you've set your VAT as requester in dashboard Settings, looks like this:

{
  "valid": true,
  "vatId": "ATU33864707",
  "countryCode": "AT",
  "countryName": "Austria",
  "companyName": "Red Bull GmbH",
  "consultationNumber": "WAPIAAAAXk7ZpY3o",
  "source": "VIES",
  "countryVat": {
    "currency": "EUR",
    "standardRate": 20,
    "reducedRates": [10,13,19],
    "superReducedRate": 4.9,
    "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. It is returned once you set your own VAT as requester in dashboard Settings; otherwise it is null.

Austria VAT Rates

vatnode returns the current Austrian USt rates inline with every successful response. Today's rates (standard 20%, reduced 10%, 13%, 19%, super-reduced 4.9%) are sourced from the European Commission TEDB feed, checked daily and updated on any change.

Rate typeValue
Standard20%
Reduced (1)10%
Reduced (2)13%
Reduced (3)19%
Super-reduced4.9%

VIES vs National Fallback for Austria

For Austria, VIES is the sole authoritative source. vatnode does not run a national-registry fallback for this country today — when VIES is unavailable, the API surfaces a structured VIES_UNAVAILABLE error with retry guidance so you can degrade gracefully rather than silently accept unverified numbers.

Cached VIES responses (15-minute TTL on identical VAT IDs) absorb the majority of short outages transparently. For the full per-country fallback status, see the coverage matrix.

Austria VAT API — FAQ

Is the Austria VAT number the same as the company registration number?

No. The Austrian USt number is issued for VAT purposes and is distinct from any local company registration number. vatnode returns the USt number plus, when available, the registry identifier filed with the national company registry.

How fast is Austria VAT validation through vatnode?

Cached responses return in single-digit milliseconds. Live VIES lookups for Austria typically complete in under one second; a 15-minute Redis cache is applied to identical VAT IDs.

Does the API work for Austrian sole traders and small businesses?

Yes. If an Austrian sole trader or small business is registered for USt 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.

Does vatnode handle VIES outages for Austria?

vatnode caches recent VIES responses and surfaces a clear VIES_UNAVAILABLE error code with structured retry guidance. vatnode does not use a national validity fallback for Austria — only the VAT register itself can confirm a VAT registration, so during a VIES outage validation defers to the cached result or returns the error for safe handling.

What is the consultation number returned for checks in Austria?

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 once you set your own VAT as requester in dashboard Settings — including for Austria.

More on Austria

VAT APIs for Other EU Countries

See Also

Building an AI workflow? vatnode is also available to AI agents through the official MCP server — Claude, Cursor and ChatGPT can validate Austria VAT numbers and look up rates directly in chat.

Start Validating Austria VAT Numbers

100 validations per month on the free plan, no credit card required. REST JSON over HTTPS, VIES consultation number on qualified checks, EU-hosted by default.

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