National Insurance numbers

Online

Get your National Insurance number

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

  • register for or log in to your personal tax account to view or print a letter confirming your number now
  • 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, P60, tax returns or official letters about tax, pensions or benefits.

Webchat

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Phone

Call to get advice if:

  • you’re over 15 years and 9 months and 20 years old and haven’t 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 haven’t got a National Insurance number Apply for a National Insurance number

HMRC won’t 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 8pm
Saturday: 8am to 4pm

Closed Sundays and bank holidays.

Find out about call charges