Declaration at the end of the month, payment at the beginning of the month, and deduction in the middle of the month. Every month 1- 10 is the audit period of social security agencies, and the accepted increase or decrease business is audited and settled, and the collection data of the current month is verified. Every month 1 1 to the last working day of the month is the time for accepting the declaration. If there is any change in the number of personnel in the payment unit, it must be handled at the social security office in time in the current month.