The revenue loss from tax expenditures is enormous: Discretionary spending, noninterest mandatory spending, total revenue, and tax expenditures as a share of GDP, 2017
| 2017 | |
|---|---|
| Discretionary spending | 6.3% |
| Mandatory spending minus net interest | 13.1% |
| Total revenue | 17.3% |
| Tax expenditures | 7.7% |
Source: EPI analysis of data from the Government Accountability Office (GAO 2019) and the Congressional Budget Office (CBO various years)