The so-called credit card overrun fee means that the credit card holder uses the card when it exceeds the credit limit, and the bank will charge the overrun fee for the part that exceeds the credit limit. That is to say, if the cardholder's credit card limit is 10000 yuan, but his accumulated credit card consumption during an interest-free period reaches 1 1000 yuan, then the bank will charge an extra fee for the excess 1000 yuan.