For debit cards, it should be "deposit first, then spend", but on the premise that it is recognized as goodwill overdraft and repayment is guaranteed, the cardholder is also allowed to overdraw an appropriate amount in a short time when the money is urgently needed. Overdraft interest is generally much higher than bank loans in the same period, and card issuers also have a set of measures to prevent and recover overdraft risk losses.
Extended data, taking credit card consumption of 50,000 yuan as an example. If the period from the billing date to the repayment date is 45 days, the cardholder will repay 40,000 yuan on the repayment date, and the remaining 10000 yuan will not be repaid on time. If you hold a card of China Construction Bank or China Merchants Bank, you need to pay interest at the base of 50,000 yuan per day, and you need to pay overdraft interest within 45 days 1 125 yuan;
If you hold ICBC's credit card, you only need to calculate the outstanding overdraft interest of 1 0,000 yuan, and the overdraft interest to be paid within 45 days is 225 yuan, a difference of 5 times. If you can't repay on time, it's not because you can't repay, but because you remember wrong, which leads to a small number of mistakes, then the difference is even greater.
Baidu encyclopedia-credit card overdraft