National Insurance numbers

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  • Telephone: 0300 200 3500
  • Textphone: 0300 200 3519
  • Outside UK: +44 191 203 7010

Call to get advice if:

  • you’re between 15 years and 9 months and 20 years old and haven’t received a National Insurance number
  • you’ve lost or can’t remember your National Insurance number
  • you need a letter confirming your 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 10 working days.

Apply for a National Insurance number if you’re over 20 years old and haven’t got one.

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Opening times:

8am to 8pm, Monday to Friday
8am to 4pm, Saturday

Closed Sundays and bank holidays

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