Legal analysis: for the calculation of interest on credit card arrears, credit cards generally have a grace period of three days after repayment, and repayment within the grace period is regarded as timely repayment. If the repayment amount is less than the minimum repayment amount stipulated by the bank, it will be deemed overdue, with interest of 0.05% and late payment fee of 5% of the outstanding minimum repayment amount. If the repayment amount is greater than or equal to the minimum repayment amount and less than the total repayment amount, interest shall be paid at 0.05%.

Legal basis: Provisions on Several Issues Concerning the Application of Laws in the Trial of Private Lending Cases Article 26 If the interest rate agreed by both borrowers and lenders does not exceed 24% of the annual interest rate, the people's court shall support it.

The interest rate agreed between the borrower and the borrower exceeds the annual interest rate of 36%, and the interest agreement in excess is invalid. The people's court shall support the borrower's request to the lender to return the part of the interest paid that exceeds 36% per annum.