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If you do not know your National Insurance number, the quickest and easiest way to find it is:
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).
You’ll need to sign in to your personal tax account using your Government Gateway user ID and password.
You may be able to find it on your:
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.
You can apply for a National Insurance number if you’ve never had one.
Don’t include personal or financial information like your National Insurance number or credit card details.
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