You can find your National Insurance number on your payslip, P60 or tax return.
If you still can’t find it, you can either:
- fill in form CA5403 – Your National Insurance number and send it to the address on the form
- phone the National Insurance Registrations Helpline and answer a series of questions (you’ll need to fill in form CA5403 if you can’t answer the questions)
HMRC won’t tell you your National Insurance number over the phone - they’ll post it to you.
National Insurance Registrations Helpline
Telephone: 0300 200 3502
Textphone: 0300 200 3519
Monday to Friday, 8:30am to 5pm
Find out about call charges
You don’t need a National Insurance plastic card as long as you remember your number. HMRC no longer sends these cards out.
You turned 16 and didn’t get a number
You should automatically get a National Insurance number just before your 16th birthday. If you didn’t and you’re under 20, phone the National Insurance Registrations Helpline on 0300 200 3502.