There are many reasons, such as:
1. The consumption in the credit card was not accounted for or included in the current balance, but it occupied the line. (generally record consumption needs 1 day)
2. There is installment business in the credit card, which occupies the credit card quota, but it is included in the bill for monthly installment repayment and is not shown in the "current balance".
3. There is pre-authorization in the credit card, and the amount is frozen, but it is not included in the current balance.
4. There are multiple credit cards in the name, and the consumption of other cards will also occupy the credit card, but it will not be included in the current balance of this credit card.
As long as your consumption is not accounted for, that is, it is not included in the "balance", you don't need to repay, and you don't need to repay until the balance is included, so this credit card doesn't need to repay for the time being, so pay attention to the monthly bill of the credit card in the future.