Electronic-commerce (e-commerce) has become a common aspect of human life due to its convenience for customers, notably in Business to Customer (B2C) commerce, due to the rapid growth of science, computer, and network technology. The consumer may place orders from home, saving time. Online payment systems play a major part in e-commerce and are utilized to execute transactions. The goal of this thesis is to provide the current state of affairs concerning the factors that impact customer satisfaction in online transactions in the Islamic banking system. Theoretical foundation is discussed and chapter one will explain the inception and evolution of internet transactions in Islamic banking. Furthermore, this chapter discusses the significance and objectives of the investigation, as well as the research questions, problem statement, and limitations of the study, the backdrop of the study, the structure of the study, and the operational field of study. The second chapter will outline previous research that has been drawn from books, articles, journals, and other sources in order to examine any gaps in the literature that have not yet been investigated. This chapter will also go into detail about studies that have been done on how UMK City Campus students feel about online transactions using Islamic banking systems. A survey questionnaire was used in the study department to examine diverse customer viewpoints on online payments. A survey questionnaire will be given to 306 students who have previously conducted online transactions in the Islamic banking system. In this study, a positive link was found between the characteristics listed above and the intention of re-online transactions, confirming the research hypothesis.