VAT Number Checker (Ireland)
Check that a VAT Number is correctly formed and that its check digit computes, before you put it on an invoice. Nothing is sent anywhere.
- Free
- No sign-up
- Nothing uploaded
- Updated for 2026
- Last reviewed October 2026
- Reviewed by the Owoode team
- € EUR
- VAT 23%
- VAT number
- A4
- English
Enter a number above.
Example: IE 6433435F
How the number is built and checked
An Irish VAT number is the prefix IE followed by six digits and two letters, or seven digits and one or two letters. Revenue's VIES manual gives the examples IE1234567A, IE1Z23456A and IE1234567AB. A sole trader's tax reference number is their PPS number once registered with Revenue.
Irish traders can check a customer's EU VAT number through the VIES service of the European Commission, which Revenue links from its guidance. The service confirms whether a number belongs to a named trader. It cannot be used to find a trader's number or to look up the name and address behind a number. Revenue says the check is meant for cases of doubt, not routine use, and can confirm a verification in writing on request through MyEnquiries on ROS.
What this does and does not tell you
This page checks arithmetic, not registration. Every VAT Number carries a check digit calculated from the digits before it, which is what catches a typo. Confirming that a business is genuinely registered means asking Revenue Commissioners, because only they hold the register.