This research investigated the relationship between academic performance and self-efficacy among pre-university students in Malaysia using cross-sectional survey data. The sample comprised 171 pre-university undergraduates, aged between 18 and 20, studying at a public university in Kuala Lumpur. They were derived from the population to form the sample using stratified random sampling. Two separate scales measuring academic self-efficacy and academic performance (i.e., the CEVEAPEU) were used to collect the survey data. The study used descriptive statistics, independent sample t-test, Pearson correlation, and multiple regression to analyze the data. The results indicate that a majority of the students reported a high level of academic self-efficacy and established a strong positive relationship between self-efficacy and academic performance. No statistically significant gender differences were found in the respondents’ academic self-efficacy, but academic performance was significantly influenced by academic self-efficacy. The findings suggest the potential involvement of additional variables, such as CGPA, in shaping students’ academic performance, highlighting the need for further exploration of these variables in future studies.