CBO analyzes the effects of carbon import tariffs and export rebates (implemented along with a carbon tax) on sectoral output, trade, and carbon dioxide emissions and compares them with the effects of a carbon tax alone.
View CBO's budget infographics to see how much the federal government spent and took in during fiscal year 2025, as well as broader trends in the budget over the past few decades.
Discretionary outlays by the federal government totaled $1.9 trillion in 2025. Outlays for nondefense programs accounted for more than half of that total.
Mandatory outlays by the federal government totaled $4.2 trillion in 2025; more than half was for Social Security and Medicare. The largest increases over the past 20 years have been for the major health care programs.
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