Telkom University, in its routine admission process, generates a rich dataset consisting of various attributes of prospective students. These attributes extend beyond academic parameters like the grade point average (GPA) from the final high school year, encompassing non-academic data such as parental occupation, income, student's gender, origin province, high school major, and school category. Previous research has predominantly focused on academic and sociodemographic data, such as GPA and family income, respectively, for predicting study performance. However, factors like school major, study program, and school category have often been overlooked. In this study, the objective is to utilize the comprehensive Student Selection Data (SMB) to devise a model for predicting the performance of students in their first semester at Telkom University. The aim is to address the issue of a low rate of on-time graduation by leveraging the untapped potential of SMB data. An Iterative Dichotomiser 3 (ID3) decision tree algorithm forms the backbone of the proposed model, enabling the classification of student performance based on a range of diverse attributes. Information gain-based feature selection revealed the five attributes with the greatest influence on student performance in the first semester: gender, grade point average from the final year of high school, study program, high school major, and school category. These findings underscore the potential of a more inclusive approach to student data analysis in predicting academic success in higher education.