What does the social security payment base of 4000 mean?

Legal analysis: the social security base of 4000 means that the social security contribution base of employees in a social security year is 4000. 1, and the social insurance base is determined from 1 to 12 according to the monthly average amount of all wage income of employees in the previous year.

Legal basis: Article 5 of the Social Insurance Law of People's Republic of China (PRC) People's governments at or above the county level shall incorporate social insurance into the national economic and social development plan. The state raises social insurance funds through multiple channels. People's governments at or above the county level shall give necessary financial support to social insurance. The state supports social insurance through preferential tax policies.