If you have outstanding contributions after the contribution day, your trustee has to report this to the MPFA.
The MPFA may impose a surcharge calculated at 5% of the amount of default contributions; and / or a financial penalty of HK$5,000 or 10% of the amount of default contributions (whichever is greater). Defaulting employers may also be prosecuted with a maximum penalty of four years’ imprisonment and a fine of HK$450,000.