Why do I need NIN?
To be able to work in the UK and to access many services you will need to have a National Insurance Number (NIN0), which is essential as proof of your identity for the HM Revenue & Customs (the government department responsible for tax) and the Department
for Work and Pensions (the government department responsible for employment, pensions and welfare).
This number allows the government to track your Social Security and National Pension contributions. At the same time, you will need this number when voting in the UK local or national elections or applying for a grant or loan as a student for your studies.