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National Insurance Number

Your National Insurance number (NINO) is a unique reference used by HMRC to track your tax and contributions. You need one to work legally in the UK. You keep the same NINO for life.

You need a NINO to work and pay the correct tax
Apply online at gov.uk or call the NI helpline
It is free — you do not need to pay an agent
You keep the same number for life, even if you leave the UK
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