Social security contributions are paid this month to last month or this month to this month

Payment in the month when the month to use, the beginning of the month for payment. Monthly 1-10 for the social security agency audit period, has been accepted by the increase or decrease in business audit settlement, and approval of the month's collection data; monthly 11 to the last working day of the month for the unit to accept the declaration time. Contributing units if there are changes in personnel increases or decreases, must be timely in the month to the social security agency for the relevant procedures (annual annual declaration of the month does not accept the increase or decrease in personnel, except for new units in the month).