National Insurance Number (NINo)
A National Insurance number (NINo) is your personal reference number for the UK social security and tax system.
It is used by HM Revenue & Customs (HMRC) and the Department for Work and Pensions (DWP) to track:
- National Insurance contributions
- Tax records
- Access to certain UK benefits and services
It looks like this: AA 12 34 56 C
Who needs a National Insurance number
You usually need a NINo if you:
- Work in the UK (employed or self-employed)
- Pay UK National Insurance contributions
- Claim UK state benefits or pension
- Need your UK tax and earnings records correctly linked to you
If you have never worked or claimed benefits in the UK, you may not need one.
What a NINo is used for
Your NINo is used to:
- Record your National Insurance contributions
- Link your income to your UK tax record
- Help determine eligibility for the UK State Pension and certain benefits
It does not replace your passport or visa, and it is not proof of the right to work by itself.
NINo vs UTR — not the same
People often confuse a National Insurance number with a UTR (Unique Taxpayer Reference). They are different:
| Number | Used for |
|---|---|
| NINo | Social security and employment contributions |
| UTR | Self Assessment tax returns (mainly self-employed or landlords) |
You may have one, both, or neither depending on your situation.
When non-UK residents might need one
You might still need a NINo even if you don't live permanently in the UK, for example if you:
- Work temporarily in the UK
- Have UK employment income
- Pay UK National Insurance due to UK work activity
If you only have UK property income or investment income, you may need a UTR, but not necessarily a NINo.
How to get a National Insurance number
You normally apply for a NINo if you:
- Have the right to work in the UK, and
- Need one to start work or pay contributions
The process usually involves:
- Proving your identity
- Showing your right to work or live in the UK
- Attending an appointment (in some cases)
You apply through official UK government channels.
If you already have one
Your NINo:
- Never changes
- Stays with you for life
You can find it on:
- Payslips
- Tax letters
- Your Personal Tax Account
- Previous employment documents
If you've lost it, you can recover it through HMRC.
How Amanda uses this
Amanda may refer to your National Insurance number when assessing:
- UK employment or self-employment activity
- Your connection to the UK tax and social security system
It appears under Administrative Registrations & Status, because it relates to how you are registered in the UK system, not where you are physically located.