How to Get a National Insurance Number in the UK

If you have moved to the UK and plan to work, you may need to apply for a National Insurance number. Before applying, check whether you already have one through your immigration status or previous employment.

This guide explains how to get a National Insurance number for foreigners living in the UK, where to apply and what to prepare.

What is a National Insurance number?

Your National Insurance number is a personal reference used to record National Insurance contributions and tax against your name. It stays with you for life, including if you change your name or move overseas and later return.

Keep it secure and give it only to organisations that have a legitimate reason to request it, such as your employer or HM Revenue and Customs.

Check whether you already have one

Look at your eVisa through your UKVI account. If you previously worked in the UK, also check old payslips, P60s or HMRC correspondence. A National Insurance number may also appear on the back of an older biometric residence permit.

If you already have a number, recover it rather than applying for another. Use the official service for finding a lost National Insurance number.

Who can apply?

You can apply through the employment application service if you live in the UK, have permission to work, and are working, looking for work or have a job offer. You must be in the UK to apply.

How to apply online

1. Visit the official GOV.UK National Insurance number application page.
2. Read the eligibility guidance and follow the application link.
3. Complete your personal details carefully.
4. Follow the instructions for proving your identity.
5. Save your confirmation email and application reference.

Use your current details and check them before submitting. Follow any further instructions sent after your application.

What documents should you prepare?

Have your passport ready if you hold one. The service also accepts certain European national identity cards. The online application will explain which document details and identity evidence are needed.

You may be asked to upload photographs of your documents and yourself. If you cannot complete the online identity checks, you may need an appointment. You can still apply without the listed identity documents, but additional checks may be necessary.

See the official application and identity-check instructions before starting.

Can you start work while waiting?

Yes, if you can prove your right to work. The number itself does not grant immigration permission. Your employer must complete the appropriate right-to-work check.

How long does it take?

GOV.UK currently advises allowing up to four weeks. Keep your reference and use the application helpline if that period passes, or if your address or personal details change.

Planning your move to the UK

Sort out your immigration route before making employment plans. Keep your visa decision, eVisa access details and employment records organised so you can find them when needed.