You don't have to pay social security for how many years.

According to the relevant regulations, the accumulated payment period of old-age insurance should reach 15 or above, and the pension can only be enjoyed monthly after reaching the prescribed retirement age. Social basic medical insurance is different from old-age insurance. When reaching retirement age (different social security policies in different regions), men must pay for 25-30 years, and women must pay for 20-25 years. Only after retirement can they continue to enjoy social basic medical insurance benefits. When reaching retirement age, the payment period of medical insurance is not reached, and the payment period of medical insurance can be supplemented at one time before retirement according to relevant regulations.

Legal basis: Article 16 of the Social Insurance Law of People's Republic of China (PRC).

Individuals who participate in the basic old-age insurance will receive the basic old-age pension on a monthly basis if they have paid a total of fifteen years when they reach the statutory retirement age. Individuals who participate in the basic old-age insurance and pay less than fifteen years when they reach the statutory retirement age can pay for fifteen years and receive the basic pension on a monthly basis; Can also be transferred to the new rural social endowment insurance or urban residents' social endowment insurance, enjoy the corresponding pension insurance benefits in accordance with the provisions of the State Council.

Article 23

Employees should participate in the basic medical insurance for employees, and employers and employees should pay the basic medical insurance premiums in accordance with state regulations.

Individual industrial and commercial households without employees, part-time employees who have not participated in the basic medical insurance for employees and other flexible employees can participate in the basic medical insurance for employees, and individuals pay the basic medical insurance premium in accordance with state regulations.