Business decision making (BDM) increasingly depends on mathematical applications that support analytical processes, information evaluation, and problem-solving activities. This study examines the influence of computational quality, access to mathematical content quality, and graphic calculators’ quality on BDM, while also investigating the direct and moderating role of self-confidence. A quantitative research design was adopted, and data were collected from 319 respondents using a structured questionnaire. The data were analyzed using Structural Equation Modeling. The findings reveal that computational quality, access to mathematical content quality, graphic calculators’ quality, and self-confidence significantly enhance BDM. Among these factors, graphic calculators’ quality emerged as the strongest predictor of BDM. The results further indicate that self-confidence positively influences BDM and significantly moderates the relationship between graphic calculators’ quality and BDM. However, self-confidence does not significantly moderate the relationship between computational quality and BDM or between access to mathematical content quality and BDM. The study contributes to literature by integrating technological and psychological factors within a unified framework and provides practical insights for organizations seeking to improve decision quality through mathematical applications and user development initiatives.