202 1 social security year refers to the time range.

The social insurance payment base is fixed for one year in the same payment year and will not change halfway. From April to June every year, the employer shall declare the social insurance payment base of its employees in the new year according to the notice of the local social insurance agency.

The base of social insurance payment is determined according to the monthly average amount of all wage income of employees in the previous year 1 to 12. There are upper and lower limits on the social insurance payment base, which depends on the actual situation in each region.