According to HM Revenue & Customs, people stop paying National Insurance contributions once they reach the State Pension age. Employees who continue working must pay Class 1 National Insurance contributions on any earnings due before the employee reached State Pension age.
Anyone under the State Pension age is still required to pay National Insurance contributions. The State Pension age, which is the earliest age at which a person can retire, is dependent on one's date of birth. According to HM Revenue & Customs, the State Pension Age is also rising because of the need to keep up with rising life expectancy rates. HM Revenue & Customs offers a calculator to let individuals determine their own State Pension age.