Default interest is a monthly net interest rate applied when a less amount of your total debt instalment is paid at the payment date, i.e. due date. In case the minimum payment amount or a greater amount of payment is made until the due date, interest is charged until this next due date of the remaining debt amount or in cases where there is no payment, interest is charged until the next due date. If the shopping amount charged on the due date is totally paid, no interest will be charged. For cash advances, daily interest is charged on the other hand.