
National Insurance contributions are used to build up your entitlement to certain state benefits, including the State Pension. The contributions you pay depend on how much you earn and whether you're employed or self-employed.
You stop paying National Insurance contributions when you reach State Pension age.
More detailed information for both employer, employee and self- employed are detailed on the HMRC web site. See link.
HMRC websitewww.hmrc.gov.uk/