You can find your National Insurance number on your payslip, P60, or letters about tax, pensions and benefits. If you have a personal tax account you can also view it there and print a confirmation letter.
If you still can’t find it, you can either:
- fill in form CA5403 and send it to the address on the form
- phone the National Insurance numbers helpline and answer some questions (you’ll need to fill in form CA5403 if you can’t answer the questions)
HM Revenue and Customs (HMRC) won’t tell you your National Insurance number over the phone. They’ll post it to you and it will arrive within 10 working days.
You don’t need a National Insurance plastic card. HMRC no longer sends these cards out.
If you’ve never had a National Insurance number
You can apply for a National Insurance number if you’ve never had one.