There is a daily penalty fee rate for not repaying your installments by the installment repayment date.

DailyPenaltyRate=0.45%​

The daily penalty rate fee is charged to fixed-interest rate borrowers who don't pay their loans on time. It is charged daily after the maturity day.

For example, if your total debt after the maturity date is $100, and you pay 10 days later, the penalty fees will be $4.5 (0.45%*10*$100).