Bank of Communications credit card consumption has an interest-free period. As long as the cardholder repays in full and on time, it can be interest-free. The shortest interest-free repayment period is 25 days and the longest is 56 days. During this period, as long as the current payable amount (total amount owed) on the current statement is fully paid off, there is no need to pay any interest on non-cash transactions (advance cash does not enjoy interest-free discount).

If the cardholder fails to repay in full and on time, at least the minimum repayment amount will be paid, which will generate interest, but it can protect the cardholder's credit history from being affected.

The calculation formula of the minimum repayment amount of Bank of Communications' credit card is: minimum repayment amount = 10% consumption balance+10% cash withdrawal balance+interest balance+other payable expenses balance+unpaid part of the minimum repayment amount in the previous period.

When the repayment amount of the credit card holder is equal to or higher than the minimum repayment amount of the current bill, but lower than the current repayment amount, the remaining deferred repayment amount is the revolving credit balance.

The revolving credit rate of credit cards is uniformly stipulated by the People's Bank of China, with a daily interest rate of 0.5 ‰ and monthly compound interest.