Why should I write the annual income when I run a social security card?

It is used as the basis for personal social security deduction.

When the employer buys social security for the workers, it must go to the social security management department to buy it. When purchasing social insurance, the payment base is generally determined according to the wages of workers.

Total wages refer to the total amount of labor remuneration paid directly by each unit to all employees of the unit within a certain period of time. The calculation of total wages should be based on all labor remuneration paid directly to employees. What needs to be further explained is that in the notice of the Social Security Center of the former Ministry of Labor and Social Security, the total amount of wages that can be calculated as the payment base is specifically defined, and all items that are not clearly defined as wage income statistics in the relevant documents of the National Bureau of Statistics should be used as the social insurance payment base.