How to Get a National Insurance Number in the UK

What Is a National Insurance Number?

A National Insurance Number (NIN or NINO) is a unique reference number used by HMRC to track your tax and National Insurance contributions. You need one to:

• Work in the UK
• Pay the correct tax
• Build up your state pension entitlement
• Claim benefits

Who Gets One Automatically?

If you were born in the UK and are aged 16-20, you will receive a NIN automatically before your 16th birthday. If you moved to the UK as a child, your parents may have received one for you.

How to Apply If You Do Not Have One

1. Call the NI number application line: 0800 141 2075
2. You will be asked some identity questions
3. You will be posted an application form (NIN1 form)
4. Complete and return the form
5. Receive your NIN by post (usually within 4-6 weeks)

What You Need to Apply

• Your full name
• Date of birth
• Address in the UK
• Details of any previous immigration applications
• Your passport or BRP

Can You Work Without a NIN?

You can start working before you receive your NIN, but you must apply for one. Your employer will need to use an emergency tax code until you have it.

Important

• Your NIN is personal — do not share it with anyone except HMRC, your employer, or your bank
• It does not expire — once you have one, you keep it for life
• It does not give you the right to work in the UK — you still need the correct visa

Once you are settled in the UK and working, you will eventually need to pass the Life in the UK Test for citizenship.