evidence: Budgetary Effects of Making Specified Policies in the Build Back Better Act Permanent CBO and the Joint Committee on Taxation project the budgetary effects, including the effects on interest costs, of a modified version of H.R. 5376, the Build Back Better Act, that would make various policies permanent rather than temporary. [...] The Congressional Budget Office and the staff of the Joint Committee on Taxation project that a version of the bill modified as they have specified would increase the deficit by $3.0 trillion over the 2022–2031 period. That amount includes three components: effects usually counted in CBO’s cost estimates, the effects of increased resources for tax enforcement, and effects on interest on the public debt. Under long-standing guidelines agreed to by the legislative and executive branches, estimates to be used for budget enforcement purposes include the first component but not the second and third.