If the final payment date of a credit card is extended by three days, it is not considered overdue, but interest will be charged.

Detailed instructions:

1. A three-day extension of the final payment date of a credit card is not considered overdue, because the bank allows customers to repay within three days after the final payment date. This means you can pay off your balance within these three days without having a negative impact on your credit history.

2. Although it is not overdue, the bank will charge interest. Even if the repayment is deferred, the bank will still calculate interest based on the type of credit card you hold, the outstanding amount and the corresponding interest rate, and charge it when you make your next repayment.

3. Delayed repayment will cause interest to accumulate on the bill. Since interest is calculated on a daily basis, even if the extension is only for three days, corresponding interest will accrue. The interest accumulated in this way will be settled together with your next repayment.

Summary:

A three-day extension of the final credit card repayment date is not considered overdue, but corresponding interest will be charged. Therefore, it is recommended to pay off your credit card balance before the final payment date to avoid additional interest charges.

Extended information:

According to China's credit card management regulations, if the amount due on the bill is not paid off before the final repayment date, the bank will charge deferred interest, which will be charged as follows. Shown on the first installment bill. Deferred interest is usually calculated daily on an annualized basis. Therefore, repaying your loan as early as possible can avoid additional interest payments and maintain a good credit history.

Please note that the specific policies of credit cards may vary from bank to bank, so it is recommended that you consult your credit card issuing bank for accurate information if you have specific questions.