Objectives: This study examines the effects that the personal traits (agreeableness, extroversion, openness to experience) about the acceptance intention of the mobile easy payment system have on the performance expectancy, which is the UTAUT independent variable. Methods/Statistical Analysis: The study examines the previous literature about the mobile easy payment, UTAUT and personal traits and develops the research model about the effects that the personal traits have on the performance

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... ancy of UTAUT in mobile easy payment. The study collects 208 pieces of data about the performance expectancy, the behavioral intention about mobile easy payment and personal traits to verify the research model. It conducts an exploratory factor analysis using SPSS 19.0 and performs confirmatory factor analysis and structural model analysis using AMOS. Findings: The result of the study analysis shows that among the observed personal traits, openness to experience and agreeableness had an effect on the performance expectancy while extraversion had no effect on it. This demonstrates that the effects on the performance expectancy of mobile easy payment differ depending on the personal traits of people. Improvements/Applications: This study confirmed that personal traits affect performance expectancy of UTAUT in mobile easy payment. Based on this, further studies are needed to identify the relationship between the whole UTAUT model components and Big 5 personal traits about various services.