there are two international credit card interest calculation methods: one is full interest calculation, and the other is interest calculation based on the outstanding part. Most domestic banks charge interest in full. The so-called full penalty interest means that after the repayment deadline is exceeded, the issuing bank will interest the cardholder according to the total consumption amount regardless of whether the credit card has partial repayment in the current month. According to the current daily interest rate of the bank, if the cardholder fails to pay off the full amount on the due repayment date, even if it is only 1 cent short, the full amount of the current bill will be calculated at the specified interest rate, and the compound interest will be calculated monthly.

At present, commercial banks in China uniformly charge a daily revolving interest rate of .5 ‰ for credit card overdraft, which is equivalent to an annual interest rate of nearly 2%, which is much higher than the interest rate of ordinary loans, and has a certain punitive nature. The bank has set a minimum repayment amount for the cardholder's repayment method. The bank allows and reminds consumers that they can only repay the minimum repayment amount. Therefore, if the customer's repayment amount is higher than the minimum repayment amount, it should not be regarded as overdue. The cardholder partially fulfilled the repayment obligation within the scope allowed by the bank, so there is no need to be punished by the bank's high interest rate.