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National Insurance: introduction
You have a National Insurance number to make sure your National Insurance contributions and tax are recorded against your name only.
Your National Insurance number remains the same for life.
It’s made up of 2 letters, 6 numbers and a final letter.
You’ll usually get a letter confirming your National Insurance number shortly before your 16th birthday. This will be sent to the address HMRC has for you.
If you need your National Insurance number
Your National Insurance number will be on tax-related documents like your payslip or P60.
You can also get a letter with it on and find your National Insurance number online.
If you’ve never had a National Insurance number
You can apply for a National Insurance number if you’ve never had one.
Keeping your National Insurance number safe
To prevent identity fraud, do not share your National Insurance number with anyone who does not need it.
These organisations may need to know what your number is:
- HM Revenue and Customs (HMRC)
- your employer
- the Department for Work and Pensions (which includes Job
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