This research examines factors influencing the acceptance of the Mandiri Online mobile banking application. It utilized the UTAUT2 model with Trust, Perceived Security, Personal Innovativeness, and User Involvement as factors affecting the acceptance of the application. The data were collected using online questionnaires distributed to Mandiri Online Mobile Banking users. There were 192 responses analyzed with the Partial Least Squared Structural Equation Model (PLS-SEM) method. This research found that factors such as Habit, Social Influence, Perceived Security, and Trust positively affect the intention to use the application. Besides, this study also shows that Personal Innovativeness has a positive effect on the effort expectancy. Moreover, User Involvement has a positive impact on application performance expectancy. This research provides suggestions to increase the number of Mandiri Online Mobile Banking users by optimizing marketing efforts to the users. Examples are granting incentives to users giving recommendations to other Mandiri customers, promoting new features, and providing account security reminders. In addition, the bank should improve application performance based on users’ input at the application store, such as the integration of electronic payment systems, as well accelerated interaction of the application interfaces.
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