Online banking is a method of conducting transactions between businesses or individuals. Online banking has grown in popularity in recent years, particularly since the Covid-19 pandemic. The primary goal of this study was to examine the effects of perceived complexity of online banking, Internet accessibility, perceived risk, and perceived usefulness of using online banking on users' intentions to use online banking. A literature review was presented to define online banking and the determinants studied in order to provide a better understanding. The hypothesis addressed all items in the independent and dependent variables. A questionnaire form is also distributed to 350 young Malaysians to participate in this survey.A 5-point Likert scale was used to collect the data. Using the SmartPLS 4 programme, the measurement items' convergent validity, discriminant validity, and internal consistency of independent variables will be analysed. Furthermore, SPSS software will be used to test the hypothesis by examining the ANOVA as well as the Multiple Regression Analysis coefficient. In essence, perceived complexity, Internet accessibility, perceived risk, and perceived usefulness have all been shown to have a significant impact on the non-adoption of online banking. As a conclusion, it shows that factors such as perceived complexity, internet accessibility, perceived risk, and perceived usefulness have a significant impact on whether or not online banking is adopted.