Increase in Revenue Needed to Close the Fiscal Gap without Decreasing Spending, with Federal Revenues for Comparison Category Dollars (in billions) Percent of total Individual income taxes 1,609 47% Social Security and other payroll taxes 1,310 38% Other receipts 289 8% Corporate income taxes 212 6% Immediate and permanent increase in revenue to close the fiscal gap not applicable 36% URL: https://www.gao.gov/americas-fiscal-future | Last updated: 3/22/2021