I have reached retirement age, and my pension insurance is still four years short. Can I make it up at one time?

It can't be paid at once, but it can be paid for fifteen years.

According to the provisions of the Social Insurance Law of People's Republic of China (PRC):

Sixteenth individuals who participate in the basic old-age insurance will receive the basic old-age pension on a monthly basis if they have accumulated contributions for 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.

Extended data:

According to the provisions of the Social Insurance Law of People's Republic of China (PRC):

Seventeenth individuals who participate in the basic old-age insurance die of illness or non-work-related, their survivors can receive funeral grants and pensions; Persons who have completely lost their ability to work due to illness or non-work-related disability before reaching the statutory retirement age can receive disability allowance. The required funds are paid from the basic old-age insurance fund.

Article 14 Individual accounts shall not be withdrawn in advance, and the bookkeeping interest rate shall not be lower than the bank time deposit interest rate, and interest tax shall be exempted. If an individual dies, the balance of the individual account can be inherited.

Fifteenth basic pension consists of overall pension and individual account pension.

The basic pension is determined according to factors such as individual cumulative payment years, payment wages, average salary of local employees, personal account amount, average life expectancy of urban population, etc.

Article 64 Social insurance funds include basic old-age insurance funds, basic medical insurance funds, industrial injury insurance funds, unemployment insurance funds and maternity insurance funds. In addition to the basic medical insurance fund and maternity insurance fund combined accounting, other social insurance funds are accounted for separately according to social insurance types. Social insurance funds implement a unified accounting system throughout the country. The social insurance fund is earmarked for special purposes, and no organization or individual may occupy or misappropriate it.