Where Do Our Federal Tax Dollars Go?
The federal government collects taxes to finance various public services. As policymakers and the public weigh key decisions about revenues and expenditures, it is important to examine what the government does with the money it collects.
In fiscal year 2024, the federal government spent $6.9 trillion, amounting to 24 percent of the nation’s gross domestic product (GDP), according to the June 2024 estimates of the Congressional Budget Office (CBO). About nine-tenths of the total went toward federal programs; the remainder went toward interest payments on the federal debt. Of that $6.9 trillion, almost $4.9 trillion was financed by federal revenues. The remaining amount was financed by borrowing. (Note: In this analysis, the figures are adjusted for certain one- or two-day timing shifts in federal payments that distort the year-to-year paths.)
As the chart below shows, three major areas of program spending make up the majority of the budget:
Health insurance: Four health insurance programs — Medicare, Medicaid, the Children’s Health Insurance Program (CHIP), and Affordable Care Act (ACA) marketplace health insurance subsidies — together accounted for 24 percent of the budget in 2024, or $1.7 trillion. More than half of this amount, or $912 billion, went to Medicare, which in June 2024 provided health coverage to around 67 million people who are age 65 or older or have disabilities. The rest of this amount reflects the federal costs of Medicaid and CHIP ($626 billion) and ACA subsidy and marketplace costs ($125 billion). Both Medicaid and CHIP require states to pay some of their total costs.
In March 2023, Medicaid and CHIP provided health coverage or long-term care to 93.9 million low-income children, parents, older adults, and people with disabilities. That was significantly higher than the 70.9 million enrollees before the pandemic because of temporary pandemic-related coverage protection, which expired in April 2023. With its expiration, enrollment dropped to 82.8 million by March 2024 and is likely to fall further, though projections are highly uncertain.
In February 2024, 20.8 million people had enrolled in health insurance through ACA marketplaces, a significant increase over enrollment in 2023. Of the total enrolled, 19.3 million (or 93 percent) received subsidies that lowered their premiums and out-of-pocket costs.
- Social Security: In 2024, 21 percent of the budget, or $1.5 trillion, was spent on Social Security, which provided monthly retirement benefits in September 2024 averaging $1,922 to 51.5 million retired workers. Social Security also provided benefits to 2.6 million spouses and children of retired workers, 5.8 million surviving children and spouses of deceased workers, and 8.4 million disabled workers and their eligible dependents.
- Defense: Another 13 percent of the budget, or $872 billion, was spent on national defense activities. About 95 percent of the spending in this category reflects the underlying costs of the Defense Department, largely for operations and maintenance; military personnel; procurement of weapons; and research, development, testing, and evaluation.
Three other categories together account for the remaining program spending:
- Benefits for veterans and federal retirees: In 2024, about 8 percent (or $526 billion) of the budget provided benefits to veterans and former career employees of the federal government, both civilian and military. About nine-tenths of the benefits available to all veterans are either disability payments or medical care, which is often specialized to deal with the unusual conditions that military service may impose. In March 2023 there were more than 18 million veterans of U.S. military service, of whom 2 million were retired career military who have earned monthly retiree pensions or survivor benefits. There were also 2.7 million federal civil service retirees.
Economic security programs: About 7 percent (or $476 billion) of the 2024 federal budget supported programs that provide aid (other than health insurance or Social Security benefits) to individuals and families facing hardship. Economic security programs include: the refundable portions of the Earned Income Tax Credit and Child Tax Credit, which assist low- and moderate-income working families; programs that provide cash payments to eligible individuals or households, including unemployment insurance and Supplemental Security Income for low-income people who are over age 65 or disabled; various forms of in-kind assistance for low-income people, including the Supplemental Nutrition Assistance Program (formerly known as food stamps), school meals, low-income housing assistance, child care assistance, and help meeting home energy bills; and other programs such as aid for abused or neglected children.
Economic security programs keep millions of people above the poverty line each year. They also reduce, but do not eliminate, racial and ethnic differences in poverty rates.
- All other program spending: As the chart above shows, the remaining federal program spending supports a variety of other public services. They include investing in education; investing in basic infrastructure such as roads, bridges, and airports; maintaining natural resources, farms, and the environment; investing in scientific and medical research; enforcing the nation’s laws to promote justice; and other basic duties of the federal government. A very small share — less than 1 percent of the budget — goes to programs that operate internationally, including humanitarian aid and the operation of U.S. embassies and consulates.
In addition to program spending, the federal government makes regular interest payments on the money it has borrowed to finance past and current deficits. The federal debt net of financial assets reached $25.9 trillion by the end of fiscal year 2024 and led to $892 billion in interest payments in 2024, or 13 percent of the budget. Interest payments are for debt accumulated over the nation’s history — that is, the net impact of deficits and surpluses since 1789 — and therefore result from budget policies affecting both revenue levels and program costs, past and present.
While critics often raise concerns about “government spending” in the abstract, it is important to determine whether the actual public services and investments that government programs provide are valuable. Federal revenue is used to pay for these services and investments. Consequently, when thinking about the costs that taxes impose, those costs should be weighed against the benefits the nation receives from the expenditure of those funds.
Appendix
This backgrounder discusses total federal spending and thus does not distinguish between programs financed by general revenue and those financed by dedicated revenue (for example, the payroll taxes that support Social Security). For more information, see Policy Basics: Federal Payroll Taxes.
Our figures for fiscal year 2024 are derived from a database of account-level expenditures released by the Congressional Budget Office on June 18, 2024. (Fiscal year 2024 ran from October 1, 2023 to September 30, 2024.)
The broad expenditure categories presented in this paper are constructed from official classifications commonly used by budget agencies. The categories consist of related programs and activities in different functions and subfunctions, as described below.
Health insurance:
This category consists of the Medicare function (570), including benefits, administrative costs, and premium income, as well as the “Grants to States for Medicaid” account, the “Children’s health insurance fund” account, the ACA’s “Refundable Premium Tax Credit and Cost Sharing Reductions” account, and the ACA’s “Risk Adjustment Program Payments” account (all in function 550).
Social Security:
This category consists of all expenditures in the Social Security function (650), including both benefits and administrative costs.
Defense:
This category is the national defense function (050).
Benefits for veterans and federal retirees:
This category combines the veterans’ benefits and services function (700) and the federal employee retirement and disability subfunction (602), which is part of the income security function.
Economic security programs:
This category includes all programs in the income security function (600) except those in the following two subfunctions: federal employees’ retirement and disability (602) and general retirement and disability insurance (601). The latter contains the Pension Benefit Guarantee Corporation and covers programs that provide pension and disability benefits to certain small groups of private sector workers.
Interest on debt:
This category consists of the net interest function (900).
Remaining program areas:
This category includes all federal expenditures not included in one of the six categories defined above. The subcomponents of this category that are displayed in the chart are defined as follows:
- Education: This subcategory combines three subfunctions of the education, training, employment, and social services function: elementary, secondary, and vocational education; higher education; and research and general educational aids (subfunctions 501, 502, and 503, respectively).
- Transportation: This subcategory consists of the entire transportation function (400).
- Natural resources and agriculture: This subcategory consists of the natural resources and environment function (300) and the agriculture function (350).
- Science and medical research: This subcategory consists of the general science, space, and technology function (250) and the health research and training subfunction (552).
- Law enforcement: This subcategory consists of the administration of justice function (750).
- International: This subcategory consists of the international affairs function (150).
- All other: This subcategory consists of all other federal expenditures.
Updated January 2025