There is good reason to look at energy and sustainability as "the" capital investment--savings that can be achieved through energy conservation and other sustainability measures can help offset increasing deferred maintenance and capital renewal costs. The APPA Energy and Sustainability Assessment Tool (ESAT) provides a dynamic database that can be used to track key energy and sustainability performance indicators, with respect to campus management and infrastructure as well as individual buildings. The objective of this article is to explain how ESAT works and the benefits of using it as a part of the campus management process. (Contains 6 figures.)