Azerbaijan has introduced significant reforms to improve school leadership in public schools. Responsibilities were redefined to prioritize teacher supervision and engagement with school governance structures to ensure school improvement and accountability measures. The purpose of this study was to provide insight into contextual factors predicting the extent of principals' sense of self-efficacy, or capacity, for instructional leadership in public schools in the capital city of Baku. Findings suggest that any increment in outcome expectancy for teacher supervision, mentorship, and training is likely to increase Baku principals' intentions to perform those instructional leadership practices. However, time on instructional leadership is the key contextual factor influencing outcome expectancy. Findings also point to the importance of time spent on stakeholder engagement and school management tasks such as providing classroom resources, which are interrelated to instructional leadership tasks. Policy reforms for instructional leadership in Azerbaijan need to consider the interrelations between school leadership functions.