AI agents for business finance: what they can and can't do
What AI agents can do in bookkeeping, close, collections and compliance today, where a person must stay in charge, and how to judge a product.
The short answer
A National Insurance (NI) number is your reference for tax and National Insurance on UK wages. Check first: GOV.UK says it may be printed on the back of your BRP, or found by viewing your eVisa in your UK Visas and Immigration account. If you do not have one, apply online while in the UK; it can take up to four weeks, and you can start work before it arrives if you can prove your right to work.
What the NI number does
Employers use your National Insurance number to report your pay and deductions to HMRC so that tax and contributions are recorded against you. It stays the same for life. For a Nigerian student with a part-time job, it matters mainly for one practical reason: without it, your payslips may show an emergency tax code and your records can be hard to match later. It is not proof of your right to work, and you should never share it with anyone except an employer, HMRC or a similar official body.
Check whether you already have one
Many students already hold a number without realising it. GOV.UK says:
- If you have a biometric residence permit (BRP), your NI number may be printed on the back.
- If you have an eVisa, you may already have a number and can find it by signing in to your UK Visas and Immigration account and viewing your eVisa.
Physical BRPs are being replaced by eVisas, so newer arrivals are more likely to look in the UKVI account. If the number is not there, you need to apply.
Who can apply and how
GOV.UK says you can apply if you live in the UK, have the right to work there, and are working, looking for work or have a job offer. You can only apply while you are in the UK. A Student visa with work permission meets the right-to-work condition, subject to the hour limits explained in our guide to the 20-hour rule.
Steps
- Have your passport ready. GOV.UK lists a passport from any country (or certain European national ID cards).
- Apply through the online service on GOV.UK and prove your identity during the application.
- Take and upload a photo of yourself holding your passport, plus photos of other identity documents. A smartphone is fine and someone else can take the photos.
- Watch for an email with your reference number. It will say if you must give further proof of identity.
- If you cannot upload photos, you may be asked to attend an appointment or post photocopies; the email explains what to do.
Timing, and working while you wait
GOV.UK says "it can take up to 4 weeks" to get your number after your identity has been proved, and you can call the application helpline if more than four weeks have passed, you have moved or your details changed.
Crucially, you can start work before the number arrives if you can prove your right to work. In practice your employer checks your immigration permission, usually through details you share from your UKVI account, then passing on the NI number once you have it.
| Stage | What happens | Typical timing (as GOV.UK states) |
|---|---|---|
| Arrival and enrolment | Check BRP or eVisa for an existing number | First week |
| Job offer | Employer checks right to work | Before your first shift |
| Application | Online, with identity photos | Any time while in the UK |
| Number issued | Give it to your employer | Up to 4 weeks after identity proved |
What to check first
- Your eVisa or BRP for an existing number before applying.
- That your work hours stay within your visa conditions.
- Your first payslips: if the tax code looks like an emergency code once your number is in, ask payroll to update it.
- Your name matches your passport exactly on the application.
Common problems and how to fix them
Most delays come from small mismatches rather than eligibility. The table below sets out the situations students most often meet and the route GOV.UK points to for each.
| Problem | What to do |
|---|---|
| The email asks for more proof of identity | Follow the instructions in that email; it may offer an appointment or ask you to post photocopies |
| More than four weeks have passed since your identity was proved | Call the National Insurance number application helpline listed on GOV.UK |
| You moved house or your details changed while waiting | Tell the helpline, so letters reach you |
| Your employer wants a number before your first shift | Point them to the GOV.UK rule that you can start work once your right to work is proved |
| You cannot find a number you think you were given | Check the back of any old BRP and your eVisa in your UKVI account before applying again |
Keep the number safe
Treat the number like your BVN at home. Write it somewhere private, give it only to your employer and official bodies, and ignore texts or calls that ask for it to "release" a refund. Scams that copy HMRC messages are common, and a real request will come through your employer or a GOV.UK service.
Why it is worth sorting early
The number follows you for life, including if you stay on after your course. Getting it in your first term means every payslip is matched to your record from the start, which avoids having to correct months of entries later. If you take a second job, give both employers the same number.
Where Pryme fits
Your UK wages will go into a UK account, which our guide to opening a UK bank account as a Nigerian student covers. If you send part of your pay home, our guide to sending money to Nigeria from the UK explains the costs. A Pryme Personal Account holds GBP and NGN with local details for each, and Swap shows the rate and fee before you approve.
Questions people ask
Can I work in the UK without a National Insurance number?
Yes. GOV.UK says you can start work before you get the number if you can prove your right to work, then give it to your employer when it arrives.
How long does it take to get an NI number as a student?
GOV.UK says up to four weeks after your identity has been proved.
Where is my NI number on my eVisa?
Sign in to your UK Visas and Immigration account and view your eVisa; GOV.UK says you may already have a number shown there.
Can I apply for an NI number from Nigeria?
No. GOV.UK says you can only apply while you are in the UK.
Sources
- GOV.UK: Apply for a National Insurance number · accessed Oct 2026
- GOV.UK: Apply for a National Insurance number, how to apply · accessed Oct 2026
- UKCISA: Student work (last updated 28 Jan 2026) · accessed Oct 2026
This article is general information, not financial, legal or tax advice. Products described are provided under the terms on this site and are subject to regulation and eligibility.