Regulations Governing Institutions Engaging In Credit Card Business Article 48
A card issuer shall calculate interest on the revolving credit of credit card according to the following provisions:1. A card issuer may not charge compound interest.2. The date on which interest starts to accrue shall not be earlier than the date the card issuer actually pays the merchant, and the card issuer shall follow the Mandatory and Prohibitory Provisions in a Standard Credit Card Agreement promulgated by the Competent Authority and relevant provisions in the Standard Credit Card Agreement Template.3. Fees shall not be included in the amount of principal that incurs interest on revolving credit.4. New purchases may not be included in the current principal that incurs interest on revolving credit.5. The inclusion of purchases in the principal that incurs interest on revolving credit shall be handled in accordance with the Mandatory and Prohibitory Provisions in a Standard Credit Card Agreement promulgated by the Competent Authority and relevant provisions in the Standard Credit Card Agreement Template.When a card issuer charges the cardholder late fees as agreed because the cardholder fails to make minimum amount due by the payment due date, the charge method shall comply with the provisions stipulated by the Competent Authority.
中文原文 信用卡業務機構管理辦法第48條
發卡機構辦理信用卡循環信用，其計息方式應依下列規定辦理：
一、不得以複利計息。
二、起息日不得早於實際撥款日，且應依據主管機關發布之信用卡定型化契約應記載及不得記載事項與範本之相關規定辦理三、不得將各項費用計入循環信用本金。
四、不得將當期消費帳款計入當期本金計算循環信用利息。
五、得計入循環信用利息本金之帳款應依據主管機關發布之信用卡定型化契約應記載及不得記載事項與範本之相關規定辦理。
發卡機構因持卡人未於當期繳款截止日前付清當期最低應繳金額，而約定向持卡人收取違約金時，其收取方式應依主管機關規定辦理。
一、不得以複利計息。
二、起息日不得早於實際撥款日，且應依據主管機關發布之信用卡定型化契約應記載及不得記載事項與範本之相關規定辦理三、不得將各項費用計入循環信用本金。
四、不得將當期消費帳款計入當期本金計算循環信用利息。
五、得計入循環信用利息本金之帳款應依據主管機關發布之信用卡定型化契約應記載及不得記載事項與範本之相關規定辦理。
發卡機構因持卡人未於當期繳款截止日前付清當期最低應繳金額，而約定向持卡人收取違約金時，其收取方式應依主管機關規定辦理。