How large will the federal deficit grow over 30 years?
Core argument: CBO projects the total federal budget deficit will reach 8.5% of GDP in 2054, a level exceeded since the Great Depression only during and shortly after World War II, the 2007–2009 financial crisis, and the coronavirus pandemic.
In CBO’s projections, the total federal budget deficit increases significantly in relation to gross domestic product over the next 30 years, reaching 8.5% of GDP in 2054. Since the Great Depression, that level has been exceeded only during and shortly after World War II and during the 2007–2009 financial crisis and the coronavirus pandemic. That growth results from rising interest costs and large and sustained primary deficits, which exclude net outlays for interest. Those deficits average 2.2% of GDP over the 30-year period; over the past 50 years, they averaged 1.6% of GDP. Projected primary deficits are especially large given the forecast of low unemployment rates. Measured as a percentage of GDP, federal outlays are large by historical standards and, beginning in 2028, increase in each year, reaching 27.3% of GDP in 2054. Growth in net interest costs and in spending for federal health care programs, particularly Medicare, drives those increases. Revenues, also measured as a percentage of GDP, fluctuate over the next decade and increase thereafter, reaching 18.8% of GDP in 2054.

