Do I have to pay social security during the probation period in Shanghai? How to calculate the social security base?

It is illegal not to pay social insurance during the probation period in Shanghai. Shanghai units have established labor relations with employees since the date of employment, and the probation period is included in the labor contract. Therefore, the unit shall, within 30 days from the date of employment, handle the social insurance registration procedures for employees and pay social insurance according to law.

How to determine the adjustment of annual social security base in Shanghai?

The base of individual contributions in that year is determined according to the average monthly wage income of employees in the previous year.

The average monthly wage income of employees is included in the statistics of total wages, including hourly and piecework wages, bonuses, allowances and subsidies, overtime wages and wages paid under special circumstances.

The total wages are pre-tax wages, including personal income tax, social insurance, housing accumulation fund, occupational annuity and other parts that should be paid by individuals directly withheld or remitted by the unit from personal wages.