This is just an example for educational purposes. Don't use these numbers for anything ever.
National Insurance (NI) in the United Kingdom is a system of contributions paid by workers and employers towards the cost of certain state benefits. It was initially a contributory system of insurance against illness and unemployment, and later also provided retirement pensions and other benefits.[1] It was first introduced by the National Insurance Act 1911, expanded by the Labour government in 1948 and has been subject to numerous amendments in subsequent years.