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UK Guide

Working in the UK: Right to Work, NI and Taxes

Before starting work in the UK, confirm that your immigration permission allows the job. Employers must check right to work, and most workers need a National Insurance number for tax and payroll.

Quick checklist

  • Check your eVisa or decision letter for exact work conditions.
  • Generate a right-to-work share code for employers when requested.
  • Apply for a National Insurance number if you live in the UK and have the right to work.
  • Give your employer accurate personal details so payroll and tax code setup is correct.
  • Read your first payslip for gross pay, deductions, tax code and National Insurance.
  • Avoid jobs that ask you to pay a fee for sponsorship or hand over your passport.

Right to work checks

Employers must confirm that a worker is allowed to work in the UK. If you are not British or Irish, you can usually prove status with a GOV.UK share code or eligible immigration documents. The check will show what work you can do and whether there is a time limit, so read it carefully before accepting overtime, a second job or self-employment.

National Insurance and payroll

National Insurance is part of the UK tax and social security system. You can apply for a National Insurance number if you live in the UK and have the right to work. Starting work can be possible while the number is being processed, but your employer needs accurate details and you should keep records of your application.

Job search habits

UK job applications usually use a tailored CV, short cover note and online applicant tracking systems. Do not include a photo, marital status, religion or passport number on a standard CV. Treat sponsorship offers that require personal payment, fake training fees or document handover with caution, especially if the company is not on the sponsor register.

Common questions

Work, NI & Taxes FAQs

Can I work before getting a National Insurance number?

You may be able to start work if you can prove the right to work while your National Insurance number application is in progress, but your employer will need enough details for payroll. Apply as soon as you are eligible.

What does a UK right-to-work share code show?

It lets an employer check what work you are allowed to do and how long your permission lasts, using your date of birth and the share code you provide.

Should I pay an agent for a UK sponsored job?

Be very cautious. Genuine employers do not normally require applicants to pay for a job offer. Check the sponsor, contract, salary and route rules independently before trusting an agent.

How to use this page

  1. Read the checklist first to see what needs preparing.
  2. Use the sections below for the reasoning behind each step.
  3. Check the FAQs for common edge cases.
  4. Confirm current UK rules on GOV.UK before you apply, travel, work or rent.

Related UK guide topics

Full guide