National Insurance Validator
Easily verify UK National Insurance numbers (NINO) for format accuracy or generate valid examples for testing purposes.
Validator
Verify NINO Format
Generator
Bulk Examples
What is a National Insurance Number?
The National Insurance number (NINO) is a unique personal account number used by the UK government for social security and tax purposes. Every person born in the UK is issued one before their 16th birthday.
- Used for HM Revenue and Customs (HMRC)
- Required for employment in the UK
- Essential for claiming state benefits
The Standard Format
A valid NINO always follows this structure:
Where to find your NINO?
NI Card
Printed clearly on the front of your blue/red NI card.
Payslips
Found on P60 forms or monthly employer payslips.
Official Letters
Correspondence from HMRC or the DWP.
Frequently Asked Questions
Is this tool safe to use?
Yes. All validation happens locally in your browser. We do not store, log, or transmit any numbers you enter on this site.
Can this tool verify identity?
No. This tool only validates the format of a NINO. It cannot confirm if a number is assigned to a specific person.
Why are some prefixes invalid?
Certain letter combinations like GB, BG, or ZZ are restricted and never used in official National Insurance numbers.
Is this tool free?
Absolutely. All generators and validators on Getnewidentity.com are 100% free for public use.