How to Find Your National Insurance Number UK 2026 (6 Ways)

Chandraketu Tripathi

Finance Editor, Kaeltripton

Published 4 Apr 2026

Last reviewed 4 May 2026

✓ Fact-checked

By Chandraketu Tripathi | Updated April 2026

Your National Insurance number is your unique identifier for the UK tax and benefits system. You need it for employment, claiming benefits, applying for student loans, opening a bank account, and registering to vote. If you've lost yours, there are several quick ways to find it — most people can locate it within minutes.

Key Facts

NI number format: AB 12 34 56 C (two letters, six digits, one letter) | Issued automatically to UK residents at age 16 | Never changes — it's yours for life | HMRC helpline: 0300 200 3500

6 Ways to Find Your National Insurance Number UK

Source: GOV.UK, HMRC. April 2026.
Method	Where to Look	Speed
Payslip	Top section — labelled 'NI Number' or 'NIN'	Instant
P60 (end-of-year certificate)	Issued by your employer each April	Instant if you have it
HMRC/DWP letters	Any letter about tax, benefits, or State Pension	Instant if you have the letter
HMRC app	Download 'HMRC' app, sign in with Government Gateway	5 minutes
Government Gateway online	Sign in at tax.service.gov.uk — Personal Tax Account	5–10 minutes
Call HMRC	0300 200 3500 (Mon–Fri 8am–6pm)	20–30 minutes (hold time)

How to Find Your NI Number via the HMRC App

Download the 'HMRC' app from the App Store or Google Play
Sign in using your Government Gateway user ID and password
If you don't have a Government Gateway account, create one at tax.service.gov.uk
Once signed in, go to your Personal Tax Account
Your NI number is displayed on the main screen
You can also request a letter to be sent to your registered address

What to Do If You've Never Had a National Insurance Number

If you have never been issued a National Insurance number, you need to apply for one through GOV.UK. This typically applies to people who have recently moved to the UK and have the right to work here. The process involves: completing an online application form, proving your identity with documents such as a passport, biometric residence permit, or birth certificate, and attending an in-person appointment at a Jobcentre Plus. There is no fee to apply for an NI number.

Where Your National Insurance Number Is Used

Employment — your employer needs it to operate PAYE correctly
Self-assessment tax returns — required when filing with HMRC
Benefits and Universal Credit — required for all DWP benefit claims
State Pension — your NI record determines your State Pension entitlement
Student loans — required when applying for student finance
Opening a bank account — some banks request it for identity verification
Registering to vote — requested (but not mandatory) on electoral registration

⚠️ Never share your NI number unless you are certain about who is asking. Fraudsters sometimes pose as HMRC or employers to steal NI numbers for identity theft. HMRC will never ask for your NI number by text or email.

Frequently Asked Questions

Where can I find my National Insurance number UK?

Your National Insurance number can be found on: your payslip, your P60 (end-of-year tax certificate), any letter from HMRC or DWP, your National Insurance card (if you have an old one), via the HMRC app or Government Gateway online account, or by calling HMRC on 0300 200 3500.

What does a National Insurance number look like?

A UK National Insurance number has a specific format: two letters, six numbers, and one final letter — for example AB123456C. The first two letters are never D, F, I, Q, U, or V. The prefix cannot be BG, GB, NK, KN, NT, TN, or ZZ. The final letter is always A, B, C, or D.

What if I have never had a National Insurance number?

If you are a UK resident who has never been issued a National Insurance number, you need to apply for one through GOV.UK. You will need to prove your identity and right to work in the UK. The process involves attending an in-person appointment. You can work before receiving your NI number — just tell your employer you have applied for one.

Can I apply for a job without a National Insurance number?

Yes — you can start working before receiving your National Insurance number. Inform your employer that you have applied for one or are in the process of applying. Your employer will still need to operate PAYE correctly. Give your NI number to your employer as soon as you receive it.

Is my National Insurance number the same as my NHS number?

No — these are two completely different numbers. Your National Insurance number is used for tax and benefits. Your NHS number is used for healthcare. They have different formats and are issued by different government departments.

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Disclaimer: Tax rates and allowances change annually. Always verify with HMRC or a qualified accountant. Sources: GOV.UK, HMRC, House of Commons Library, DS Burge & Co, Rest Less, Phinch.co.uk, Morningstar UK. April 2026.