The social security base can be adjusted several times a year.

Legal analysis: the monthly payment base of social insurance is generally determined according to the monthly average salary of employees in the previous year, and it is determined once a year. Once it is determined, it will remain unchanged for one year. Individual employees take the monthly average of their total wage income in the previous year as the monthly payment base of this year. Among them, the new employees of this unit take the full-term wage income of the employee's starting salary in the current month as the payment base. The insured unit takes the sum of the monthly payment bases of all the insured employees of the unit as the monthly payment base of the unit.

Legal basis: Article 77 of People's Republic of China (PRC) Social Insurance Law The social insurance administrative department of the people's government at or above the county level shall strengthen the supervision and inspection of the employers and individuals' compliance with social insurance laws and regulations. When the administrative department of social insurance carries out supervision and inspection, the employer and individual under inspection shall truthfully provide information related to social insurance, and shall not refuse to inspect or make false reports or conceal.