If you’re invoicing a customer in another EU country, the first thing you reach for is their VAT number. Get it wrong, and your invoice can be invalid. A quick check through the official tools saves headaches. Here’s exactly how to verify an Irish VAT number for free using Revenue.ie and the EU VIES system.

4 related posts

Irish VAT format: 7 digits plus a ‘IE’ prefix, e.g. IE1234567X · EU cross‑border checks per year: over 400 million VIES requests (2023) · Irish company VAT return frequency: bi‑monthly or annually, depending on turnover · Free official checker: VIES (EU) and Revenue.ie (Ireland)

Quick snapshot

1Confirmed facts
2What’s unclear
3Timeline signal
4What’s next
  • Use the validated VAT number on invoices; if invalid, contact the customer or Revenue for clarification.

Five details that define an Irish VAT number and where to check it.

Label Value
Irish VAT prefix IE
Typical format length 8 characters (IE + 7 alphanumeric)
Official checker (Ireland) Revenue.ie: https://www.revenue.ie
Official checker (EU) VIES: https://ec.europa.eu/taxation_customs/vies
Searchable by company name? Revenue.ie (registration status only); VIES – no

The table above shows the official channels: one for domestic checks, the other for cross‑border validation.

Can I check a VAT number online?

Official Irish VAT checker on Revenue.ie

EU VIES online tool

  • VIES (VAT Information Exchange System) checks VAT numbers across EU member states and Northern Ireland (European Commission VIES portal).
  • Select Ireland from the dropdown, enter the VAT number (including IE), and click “Verify”.
Bottom line: VIES and Revenue.ie are the two official, free online checkers. Use Revenue for Irish numbers only, VIES for any EU or Northern Ireland number. The consequence for skipping this step: an invalid invoice that could be challenged by tax authorities.

How to check if a VAT number is valid or not

Step-by-step VIES validation

Verifying an Irish VAT number format

  • A valid Irish VAT number consists of 7 characters plus a check digit, preceded by IE (Commenda – Ireland VAT verification).
  • Examples: IE1234567FA, IE9876543X.
  • If the number does not match this pattern, it is likely invalid.
What to watch

If VIES returns “Invalid”, the number may be syntactically correct but not active for cross‑border trade, or the national registration may still be pending (Irish Tax Hub – troubleshooting invalid results). This means you should not assume a typo — the registration might be legitimate but not yet live for intra‑EU transactions.

The takeaway: format and active status are two separate hurdles. Always check both.

Can you look up a company’s VAT number in Ireland?

Finding a company’s VAT number via public databases

  • Public VAT numbers are searchable through Revenue.ie and VIES, but only for active registrations (Revenue.ie – VAT verification).
  • VIES does not accept company names – you need the VAT number to start.

Limitations and privacy rules

  • Companies are not obliged to publish their VAT number; you may need to request it directly (Irish Tax Hub – privacy note).
  • No free central database lists all Irish VAT numbers by company name; VIES requires the number itself.

The implication: if a customer does not provide their VAT number, you cannot look it up through official channels.

How to search VAT number by company name

Using Revenue.ie’s eRegistration search

  • Revenue.ie’s eRegistration allows searches by business name for VAT registration status (not the number itself) (Revenue.ie – eRegistration).
  • This can confirm if a company is registered, but will not reveal the actual VAT number.

Third‑party services and their reliability

  • Some commercial databases claim to list VAT numbers by company name, but accuracy varies (Commenda – commercial database caveats).
  • These tools often charge for bulk lookups or are not updated in real time.

What this means: for compliance, stick to official sources – third‑party data can mislead.

Is there a free VAT number checker?

Free official tools: VIES and Revenue.ie

  • VIES (European Commission) is free and covers all EU VAT numbers including Ireland (European Commission VIES portal).
  • Revenue.ie’s VAT check is free and covers only Irish VAT numbers (Revenue.ie – free verification).

What to avoid in paid services

  • Many commercial “free” checkers may charge for bulk lookups or embed ads (Irish Tax Hub – comparison note).
  • Stick with the official tools to avoid unnecessary costs and outdated data.
The upshot

You never need to pay for a single VAT verification. The EU and Irish governments already provide the same data free, instantly. This removes any excuse for cutting corners on compliance.

How to verify an Irish VAT number step by step

  1. Obtain the full VAT number from your customer or supplier – it must include the IE prefix.
  2. Open the VIES website (European Commission VIES portal) and select Ireland.
  3. Enter the VAT number exactly as provided (including IE) and click “Verify”.
  4. Check the result: “Valid VAT number” or “Invalid VAT number”.
  5. If valid, save a screenshot or printout showing the date, request ID, and the result (Irish Tax Hub – audit trail advice).
  6. If invalid, contact the customer to confirm the number, or check Revenue.ie directly for Irish numbers only.

Confirmed facts

  • Revenue.ie provides a free official VAT number verification for Irish entities.
  • VIES validates VAT numbers across all EU member states and Northern Ireland.
  • Irish VAT numbers follow the format IE followed by 7 characters.

What’s unclear

  • Whether third‑party checkers maintain real‑time updates.
  • Exact frequency of Revenue.ie database refresh.

You can verify the validity of a VAT number issued by any Member State / Northern Ireland.

— European Commission VIES portal (official EU VAT validation tool)

Check if a business is registered for VAT and verify the number.

— Revenue.ie official site (Irish tax authority guidance)

For traders selling goods across EU borders, the choice is clear: verify every VAT number through VIES before zero-rating an invoice, or risk having to account for VAT at the full rate later.

Related reading: **Fuel Allowance Ireland: Partial Payment Warning Explained** · **Member First Credit Union: North Dublin Loans & Branches**

Additional sources

docuflair.com, fund-xp.lu, vatapp.net

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Frequently asked questions

Can I check a VAT number for free?

Yes, both Revenue.ie and the EU VIES tool offer free unlimited checks. There is no charge for a single verification.

What is the format of an Irish VAT number?

An Irish VAT number starts with “IE” followed by 7 alphanumeric characters, e.g., IE1234567X.

How long does a VIES check take?

VIES returns a result in seconds for active VAT numbers, as it queries national databases in real time (Incorpro – VIES guide).

Do I need a company name to check a VAT number?

No, VIES only requires the VAT number itself. To look up registration status by company name, use Revenue.ie’s eRegistration, but it will not reveal the number.

Can I look up a VAT number for a company that is not registered?

If a company is not registered for VAT, VIES and Revenue will return “Invalid” or not found. You cannot retrieve a number for an unregistered entity.

Is VIES available 24/7?

VIES is generally available 24 hours a day, but may be briefly down for maintenance. Check the European Commission’s service status page for updates.

What should I do if a VAT number fails verification?

Ask the customer to reconfirm the number. It may also be that the registration is not yet active for cross‑border transactions (Irish Tax Hub – troubleshooting).

Can I verify a non‑EU VAT number with VIES?

No, VIES only covers EU member states and Northern Ireland. For non‑EU numbers, you must contact the relevant tax authority directly.