Having a diverse source of funding is vital to an organization’s sustainability. Yet even within a diverse financial portfolio, the funding sources vary in their consistently over time and the amount of flexibility they permit. This e-study highlights how a tool, the Reliability-Autonomy Matrix, can help a nonprofit organization’s leadership analyze its funding sources and determine if changes need to be made to improve the fit with an organizations’ needs. The Reliability and Autonomy in Nonprofit Finance E-Study allows users become familiar with the concept of reliability and autonomy of an organization’s funding sources. Jon Pratt, Executive Director of the Minnesota Council of Nonprofits developed the tool. The e-study provides information on how to use the tool, the actual spreadsheet and step-by-step instructions, as well as the real world application of two nonprofit executive directors from organizations with very different funding portfolios.