How accurate are CBOs budget projections?
By statute, CBO’s baseline projections must estimate the future paths of federal spending and revenues under current law and policies. The baseline is therefore not intended to be a prediction of future budgetary outcomes; instead, it is meant to serve as a neutral benchmark that lawmakers can use to measure the effects of proposed changes to spending and taxes. So for that reason and others, actual budgetary outcomes are almost certain to differ from CBO’s baseline projections. For a related discussion, see Chapter 1 of CBO’s Budget and Economic Outlook; see also The Uncertainty of Budget Projections: A Discussion of Data and Methods for supplemental information.
