The pressure to lead schools effectively while fulfilling instructional leadership and school management tasks could impact school administrators' perceptions of their leadership capabilities. The purpose of this quantitative, cross-sectional study was to identify the relationship between the varied tasks of school administrators as related to their leadership self-efficacy. Data were collected from 73 school administrators to ascertain leadership self-efficacy of principals and assistant principals based upon the completion of instructional leadership tasks and school management tasks. The major findings of the study indicated a positive, linear relationship between leadership self-efficacy and the instructional leadership tasks and school management tasks of school administrators. The practical application of this study provides insight into the types of tasks that impact the leadership self-efficacy of principals and assistant principals and could drive the professional learning of school administrators and the delegation of their tasks.