Romania VAT number: format and validation

By Remco from Avatcado

Format

RO followed by 2 to 10 digits. The local term is cod de inregistrare in scopuri de TVA (taxa pe valoarea adaugata) (TVA, Romanian).

Pattern: /^\d{2,10}$/

  • Variable length: the only EU VAT number with 2 to 10 digits; digits only, no letters
  • The RO prefix is granted only on VAT registration; the underlying number is the company's CUI (cod unic de inregistrare), which unregistered businesses use without the prefix

Example of a registered number: RO1590082

Check a Romania VAT number

Checks route through VIES. Caching is enabled by default. Read the source, original result time and freshness label alongside validity; a cached or stale result does not freshly confirm current registration.

Enter a VAT number to see its registration result, source and freshness

Validate via API

The same validation as an API call, with the example number above:

curl "https://api.avatcado.com/v1/validate?vat_number=RO1590082" \
  -H "Authorization: Bearer avat_live_your_api_key"
import Avatcado from "@avatcado/node";

const avatcado = new Avatcado("avat_live_your_api_key");
const { data, error } = await avatcado.vat.validate({
  vatNumber: "RO1590082",
});

if (data?.data.valid) {
  console.log(`Registered: ${data.data.company?.name}`);
}

Free tier includes 500 validations per month. Get an API key or read the API documentation.

How Avatcado validates Romania numbers

  • Primary source: VIES.
  • Company name and address: yes, observed 2026-09-04.
  • When VIES is down: ANAF (live on the request) on Pro and Business, then the cached result, then a refunded 503.

See the full coverage table.

Frequently asked questions

Why do Romanian VAT numbers have different lengths?

The number is the company's CUI, assigned sequentially since the register began, so older companies have shorter numbers. Anything from 2 to 10 digits after RO is structurally valid, which is why validators must not assume a fixed length.

What is the Romanian VAT registration threshold?

RON 395,000 annual turnover, raised from RON 300,000 on 1 September 2025. Below it, businesses may stay unregistered and invoice without TVA; above it they must register with ANAF and use the RO prefix.

How does Avatcado validate Romania VAT numbers when VIES is down?

When VIES cannot answer for Romania because of an availability fault such as MS_UNAVAILABLE or a timeout, eligible Pro and Business checks can use ANAF, run by Romanian National Agency for Fiscal Administration; the Free plan can use eligible cache instead. ANAF is queried live on the request, so the fallback answer is as current as the authority's own database, and there is no separate snapshot behind it. A confirmed answer includes the registered company name and address that ANAF publishes. ANAF lookups can only confirm a positive: if the register does not carry the number, or cannot confirm it, Avatcado never reports the number invalid on that basis, and the request moves on to the next step instead. A confirmed fallback answer carries meta.source: "anaf" and meta.source_status: "fallback", so your code can tell it apart from a normal VIES confirmation. There is no VIES consultation number attached to it, since only VIES itself issues one, which is why a request that carries requester_vat_number skips the register by default and only reaches it when you pass fallback=true. If ANAF also cannot confirm the number, Avatcado can serve an eligible stored result with meta.cached: true and meta.stale: true when it is past the cache window. Requester checks disable stored responses by default; cache=true opts back in. If no eligible source can answer, the request returns a refunded 503 (upstream_member_state_unavailable). Retain the source and original timestamp; stored evidence does not freshly confirm current registration.

Related guides

VAT rate in Romania

The standard VAT rate in Romania is 21%. Reduced rates: 11%. See all Romania VAT rates.

Sources