Find a lost National Insurance number

If you do not know your National Insurance number, the quickest and easiest way to find it is:

  • online through your personal tax account
  • in the HMRC app
  • in your Apple or Google Wallet (if you previously saved it there from your personal tax account)
  • on a document you already have, for example a payslip or P60

If you need a letter that shows your National Insurance number, you can print one from your personal tax account or the app.

HM Revenue and Customs (HMRC) will not tell you your National Insurance number over the phone. If you call them, it can take up to 15 days to get a letter with your National Insurance number.

This page is also available in Welsh (Cymraeg).

Find your National Insurance number online

You’ll need to sign in to your personal tax account using your Government Gateway user ID and password.

Start now

Find your National Insurance number on a document

You may be able to find it on your:

  • payslip
  • P60
  • letters about tax, pensions or benefits

Ask HMRC for your National Insurance number

If you still cannot find it, you can:

HMRC will post it to you and it will arrive within 15 working days.

HMRC no longer sends out National Insurance cards.

If you’ve never had a National Insurance number

You can apply for a National Insurance number if you’ve never had one.