Reserves are of critical importance to the health of the state's budget. These funds help cushion the impact of a budget problem that emerges during a recession. In this report, our office provides an overview of revenue losses that have occurred in past recessions to consider the magnitude of a budget problem that could emerge in the future. Then, we describe the Governor's reserve proposal for 2018-19 and compare this level to past reserves and other states. Next, to aid the Legislature as it evaluates the Governor’s proposal, we present a framework that the Legislature can use to plan for a recession and determine a target level of reserves. Finally, we conclude with our office’s comments on the Governor’s proposed level of reserves in light of this framework and present some alternatives for legislative consideration.