This thesis provides Naval Postgraduate School management and administrators with a tool for reviewing and possibly reducing indirect mission support costs. This thesis develops a computerized activity-based costing model for indirect mission support costs at the Naval Postgraduate School by identifying cost drivers and associated cost flows for resources and support activities. Cost drivers and associated cost flows were identified through archival research and unstructured interviews with Naval Postgraduate School personnel. Estimated cost allocation figures are calculated which can be used as a starting point to improve cost allocations at Naval Postgraduate School.