How to apply for British NIN number? Complete solution to 2026 online process

I just landed in the UK and got a job offer. I rushed to join the job. The HR said, "Send me your National Insurance Number." Many people were confused on the spot - where did this number come from? Can you work without it? Will there be a delay in salary payment?

NIN (National Insurance Number, National Insurance Number) is your "tax and social security ID card" in the UK. National Insurance deducted from your wages, receiving pensions in the future, filing taxes, and applying for some benefits are all linked to you. One number per person, remains unchanged for life - even if you change your visa, change your name, or move, the number will not change. So don’t apply twice.

Before applying for UK NIN number, make sure you meet the conditions.

The requirements for GOV.UK are very straightforward. You need to meet three points at the same time: is in the UK, has the legal right to work, is working or looking for a job, or has received offer.

There is a key change to focus on here: Since January 2026, BRP (biometric residence card) has been completely deactivated and is no longer used as a certificate of work rights. Now to prove your identity and identity status, you rely on eVisa digital visa - log in GOV.UK to generate a 9-digit share code (share code) , and employers and government systems can verify your status online. If you had BRP before, you must first bind your account to the eVisa system.

NIN number online application process: 3 steps to complete

Now the application process is almost entirely online and open 24 hours a day. The official website entrance is the "Apply for a National Insurance number" page on gov.uk (look for the official domain name service.gov.uk, don't trust the agency to charge for it).

Step 1: Fill out the online form. Prepare your passport/national ID card, your UK address, and eVisa status information.

Step 2: Verify identity. Most people can now directly use a mobile app to scan the biometric chip in their passport to complete online verification, which can be done in a few minutes. If the system cannot be digitally verified, you will receive a notification and be asked to submit additional materials or participate in an offline interview.

Step 3·Waiting for the letter. After is approved, the NIN number will be sent by letter to the UK address you filled in. The official explanation is that may take up to 4 weeks to . However, the speed has increased significantly in the past two years, and many people receive it within two or three weeks.

💡 Tips: The number will only be sent once and will not be notified via text message. After receiving it, take a photo and file it for your salary slips and future tax returns. If you lose it, it will be troublesome to recheck it.

Can I go to work first without getting my NIN number?

able! This is the most misunderstood point. As long as you can prove that you have the legal right to work, you can join the company normally and go to work while waiting for NIN. What you have to do is: tell HR that you have "submitted the NIN application" and show the share code generated by eVisa to prove the right to work.

During this period, your employer may use temporary emergency tax code (emergency tax code) to pay your salary, and may deduct a little more tax. After the NIN number is handed over to HR and HMRC, the excess deduction will be refunded or adjusted, and the money will not be deducted in vain. So don’t turn down an offer just because you don’t have an account—that’s a real loss.

3 common pitfalls when applying for NIN number

① repeated application. People with who already have NIN (such as those who applied for part-time jobs while students) do not need to apply again. The number is valid for life. Repeated submission will only slow down the system.

② The address is incorrect. The number is sent by mail. If the address is wrong, it will be lost. Before filling out, check the house number and postcode with the landlord/contract again.

③ spends money to find an agency to handle the matter. 's official application for is completely free of charge for . Any charge for "agent NIN" is an IQ tax and may also reveal your identity information.

Final reminder: The work and tax filing history recorded by NIN are related to your future application for permanent residence (ILR) to prove "legal residence and tax payment in accordance with the law". Sorting out your tax status early will only help you avoid detours on the road to permanent residence.

This article is for reference only. For specific questions, please refer to the latest announcement of GOV.UK, or consult a licensed attorney. Please refer to the official page for fees and policies.

💬 How long did it take you to apply for the NIN number before you received the letter? Did it arrive in a few days, or did it take more than a month? Let’s talk about your actual number arrival time in the comment area to give a reference to friends who are waiting.

If you find it useful, collect this article , fill in the information when you are employed, and refer to it at any time when filing taxes in the future.