National Insurance

2. Your National Insurance number

You have a National Insurance number to make sure your National Insurance contributions and tax are recorded against your name only.

It’s made up of letters and numbers and never changes.

You can find your National Insurance number:

  • on your payslip
  • on your P60
  • on letters about your tax, pension or benefits
  • in the National Insurance section of your personal tax account

You can apply for a National Insurance number if you don’t have one or find your National Insurance number if you’ve lost it.

Who uses your National Insurance number

These organisations need to know what your number is:

  • HM Revenue and Customs (HMRC)
  • your employer
  • the Department for Work and Pensions (which includes Jobcentre Plus and the Pension, Disability and Carers Service), if you claim state benefits, or in Northern Ireland the Department for Social Development
  • your local council, if you claim Housing Benefit, or the Northern Ireland Housing Executive
  • Electoral Registration Officers (to check your identity when you register to vote)
  • the Student Loan Company, if you apply for a student loan
  • your pension provider if you have a personal or stakeholder pension
  • your Individual Savings Account (ISA) provider, if you open an ISA
  • authorised financial service providers who help you buy and sell investments like shares, bonds and derivatives - you can check if your provider is authorised

To prevent identity fraud, keep your National Insurance number safe. Don’t share it with anyone who doesn’t need it.

Proving your National Insurance number

You can print a letter confirming your National Insurance number from your personal tax account.

If you don’t have a personal tax account, contact HMRC to ask for a letter.