Interest will be added if the credit card is overdue. Credit card is a convenient way of consumption. When the cardholder uses the credit card for consumption, the bank will provide the cardholder with a certain credit limit. If a cardholder fails to pay off the amount owed on their credit card bill on time, it will become overdue. The bank will charge a certain amount of interest as compensation based on the number of days overdue. This is the credit card overdue interest.

The main reasons why credit card overdue interest is legal are as follows:

1. Contract agreement: The use of a credit card is based on a contract, and the cardholder needs to sign the contract when applying for a credit card. . The contract clearly stipulates that interest needs to be paid in case of overdue payment, and the cardholder has already known and agreed to this agreement when applying for the card.

2. Risk compensation: The generation of overdue interest on credit cards is the bank’s compensation mechanism for credit card overdue risks. If overdue cardholders fail to pay interest, the bank will face certain risks and losses. By charging overdue interest, banks can mitigate overdue risks and protect their own interests.

3. Economic rationality: The collection of overdue interest is also a business method of banks. Credit card business is a profitable business for banks. The collection of overdue interest is an important part of bank operations and can bring certain profits to banks.

To sum up, interest will be added when a credit card is overdue. This is a legal mechanism based on contract agreement and risk compensation, and it is also one of the bank's business methods. Overdue interest is charged to balance the risks of credit card consumption and protect the bank's interests.

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