Is the social security payment base of the same unit the same?

Same. Inquired in official website, State Taxation Administration of The People's Republic of China, People's Republic of China (PRC), the wage level of employees working in the same unit is not much different, so the social security payment base is the same. The social security payment base is the basis for the insured units and insured persons to pay social insurance premiums, which is determined according to the average monthly wage income of employees in the previous year.