The most cost-effective time for credit card swiping needs to be calculated according to the billing date and repayment date.

1. billing date

every month, the bank will summarize and settle all transactions and expenses of the cardholder's credit card account in the current period, calculate the total amount owed by the cardholder and the minimum repayment amount, and send a statement for the cardholder. This date is the billing date of the credit card.

2. Repayment date

The due repayment date refers to the latest date stipulated by the card-issuing bank that the cardholder should repay all or the minimum repayment amount. Taking the credit card of Postal Savings Bank as an example, the current due repayment date is the 2th day after the billing date. If the cardholder's billing date is the 3rd day of each month and the interest-free repayment period is 2 days, then the cardholder's due repayment date is the 23rd day of each month (3+2).

suppose that your billing date is the 3rd of each month. If you spend 2 yuan by swiping your card on June 6th, the next billing time will be July 3rd, 2 days later, and July 23rd is your due repayment date. You only need to pay off your debt before July 23rd.

if you swipe your card on the day after the billing date, that is, on the 4th of each month, you can enjoy an interest-free repayment period of up to 5 days.