Is rising federal debt driven by spending exceeding revenue?
Core argument: CBO's June 2024 baseline projects federal spending of $84.9 trillion (24.1% of GDP) and revenue of $62.8 trillion (17.8% of GDP) over the next decade, against 50-year historical averages of 21% and 17.3% of GDP.
Rising debt under CBO's baseline is driven by a large disconnect between spending and revenue, with spending totaling $84.9T (24.1% of GDP) over the next decade and revenue totaling $62.8T(17.8% of GDP). By comparison, the 50-year historic average is 21% of GDP for spending and 17.3% for revenue. Interest spending is a particularly large driver of growing spending and deficits. Interest costs are projected to more than double from $345B in FY 2020 to $892B in 2024, reaching a near-record of 3.1% of GDP this year and costing more than either defense or Medicare. Interest costs are projected to exceed their record as a share of the economy next year, top $1T in 2025, and continue to grow to $1.7T – or 4.1% of GDP – by 2034.



