National Insurance numbers

Online

Get your National Insurance number

If you’ve lost or forgotten your National Insurance number, or need a letter confirming it, you can:

  • register for or log in to your personal tax account to view or download, print, save or share a letter with it on
  • fill in the online form and post it to us, if you’re unable to register for a personal tax account

You can also find your National Insurance number on:

  • your payslip
  • your P60
  • your tax returns
  • official letters about tax, pensions or benefits

If your enquiry is about a possible National Insurance number scam, report the suspicious phone call, email or text to HMRC.

Phone

Call to get advice if:

  • you’re between 15 years and 9 months and 20 years old and have not received a National Insurance number
  • you cannot register for a new personal tax account to view your National Insurance number or print the confirmation letter
  • you’re over 20 years old and have not got a National Insurance number Apply for a National Insurance number

HMRC will not tell you your National Insurance number over the phone. They’ll post it to you and it’ll arrive within 15 working days.

Telephone:
0300 200 3500

Textphone:
0300 200 3519

Outside UK:
+44 191 203 7010

Opening times:

Monday to Friday: 8am to 6pm

Closed on Saturdays, Sundays and bank holidays.

You can also find out information in:

Find out about call charges