Nearly half of the discretionary funding in the US is allocated to national defense.

Federal spending falls into 2 categories: mandatory and discretionary

Federal spending is split between mandatory programs, funded automatically by law, and discretionary programs, funded through annual appropriations. This video breaks down which major programs fall into each category and why the distinction matters.

Use this calculator to find out the programs and services your federal income taxes fund.

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An analysis of the National Science Foundation's historical budget and spending

The NSF accounted for 0.1% of all federal spending in FY2024, with $9.39B—just over twice its FY1991 spending—out of $6.78T overall. Almost 99% of these funds ($9.29B) went to general science and basic research, with the rest allocated to national defense.

NASA's budget makes up less than 0.4% of total US spending

NASA's annual budget consists mainly of human spaceflight activities (50%) and robotics and scientific research programs (30%). It peaked at almost $70B in 1964 but has been below $30B since 1995, coming from discretionary nondefense funds.

The federal government has spent more money annually than it has collected every year since 2022.

Roughly 22% of US tax dollars go to Social Security

Social security is the US government’s largest expense. You can see other government expenses in a visual breakdown of what one US tax dollar actually pays for. Total spending amounts were converted to cents on the dollar and percentages.

The federal government sent roughly $1.1T to state and local governments in 2024

Federal grants support a large portion of state and local budgets, funding Medicaid, infrastructure, education, and housing. In FY 2024, these transfers made up about 16% of total federal spending.

US defense spending peaked during the Korean War at 13% of GDP

In 1953, during the Korean War, US defense spending reached 13.58% of GDP—more than three times today’s level. That peak marked the most militarized moment of the Cold War, and spending has never returned to that level since.

As of 2025, every NATO member spent at least 2% of GDP on defense, a target the alliance had been pushing toward for over a decade.

State and local governments fund very different services

Local governments allocate 39% of their spending to K-12 education, while states allocate less than 1% directly—although much of local education funding actually comes from state and federal grants to local communities. States instead allocate their budgets to public welfare and health programs (45%) and higher education (15%).

The federal deficit is the gap between what the US spends and what it collects.

Nearly 70% of the US government’s debt is domestic

This includes intragovernmental holdings like the Social Security Trust Fund and investments from US citizens, banks, and mutual funds. About 30% is foreign-held, with countries like Japan and China as major creditors, investing in US Treasury securities due to their perceived safety.

Tax policy can have a direct impact on the national debt, with past presidents' changes to tax codes inflating the deficit.

Police spending is one of the largest budget items for local governments

Local governments finance most of the costs for police in the US. Total state and local criminal justice spending—covering police, courts, and corrections—reaches hundreds of billions of dollars annually.

See a chart showing how much the US federal government pays in interest on its debt.

The Social Security Administration (SSA) accounted for 22.4% of all federal spending in 2024

The SSA is an independent executive branch agency that is primarily responsible for administering Social Security benefits. In fiscal year 2024, The SSA, ranking second among federal agencies in terms of total spending, behind only the Department of Health and Human Services.

The EPA budget was 0.2% of total federal spending in 2024

The EPA spent $13.7B in 2024, making it 23rd among federal agencies in total expenditures. Of that money, more than half was distributed to state environmental agencies for sustainability and environmental protection programs.

Visualize government spending with USAFacts to see complex federal budget data as clear charts and summaries, and explore where the money goes as well as how revenue, deficits, and debt change over time.

About 80% of US debt is held by domestic and foreign investors.

In 2024, the US committed about $82.3B to foreign aid.

That year, 67.2% of foreign aid was for economic purposes, and the remaining 32.8% was for military purposes. Israel received more US foreign aid than any other country in 2024.

The global defense industry in one chart

The world's most valuable defense companies (for example, Lockheed Martin) make up much of the global defense industry. As of 2025, RTX led the pack with a roughly $183B market cap.

The Constitution gives Congress sweeping control over the federal budget

Article I, Section 8's Spending Clause authorizes Congress to tax, pay debts, and promote the "common Defence and general Welfare," making it one of Congress's most powerful tools—and the constitutional foundation of federal budget control.

The Federal Emergency Management Agency leads the US response to disasters

Established in 1979, FEMA coordinates the government's response to hurricanes, wildfires, floods, and other disasters, providing funding, logistical support, and recovery assistance. In FY 2024, the agency spent $35.1B, nearly 40% of the Department of Homeland Security's total budget.

The Department of Justice spent $44B in 2024.

See which states contribute the most and least to the federal government.

Government shutdowns, 101

Roughly a quarter of the US federal government's spending must be approved annually through a set of 12 appropriations bills in Congress. When they aren't, a government shutdown ensues, where federal agencies are legally barred from spending any further money on nonessentials. This explainer covers the basics of government shutdowns and their impact on the broader culture.

Is there an arms race in the Middle East?

In 2021, countries in the Middle East spent $168 billion on weapons. Defense spending in the Middle East has been falling in the last few years, but this doesn’t necessarily mean that the region is de-militarizing. In 2021, Saudi Arabia spent $55...

Individual income taxes are the federal government's primary revenue source, see a tracker that breaks down where the rest of the budget comes from

The US government historically makes nearly half of its total revenue last year from individual income taxes. But the US makes also makes money from a variety of other sources, including Medicare taxes and corporate income taxes. However, the federal government has run a deficit since 2001—reaching a peak of $3.13T in 2020.

The House of Representatives controls the $7T federal budget

The House holds the exclusive "power of the purse" to initiate revenue bills, a provision in the US Constitution designed to divide power with the Senate and give states with larger populations greater influence over federal budgeting.

The US has carried debt since 1791

After the Revolutionary War, the US owed $75M to nations like France. Debt builds when spending exceeds revenue, funding programs, wars, and economic recovery efforts. Most debt is domestic, like Social Security bonds, with foreign nations also holding a share.

US public K-12 spending topped $857B in 2024

Public K-12 schools spent around $857B in 2024, averaging $17,277 per student. State and local sources shouldered nearly 90% of costs, and federal funds provided about $2,400 per pupil.

The 1956 Federal-Aid Highway Act spent $25B to build 41,000 miles of freeway

Sold to Congress as a national defense measure, the Interstate Highway Act committed the federal government to covering 90 cents of every dollar spent on a 41,000-mile freeway network, a subsidy that reshaped American cities and supercharged car dependency.

The current federal budget, deficit, and debt, in charts

The US Treasury regularly publishes updated data on the federal budget, and this site hosts visualizations of that data. See reports on spending, revenues, deficits, and where the national debt stands.

Federal government supports—but doesn't run—K-12 schools

The Department of Education contributes about 8% of K-12 funding and administers targeted grants, civil‑rights enforcement, research, and data collection. Crucially, it is legally prohibited from directing curriculum, personnel decisions, or instructional content, leaving that control to states and districts.

In 2020, government entities spent $316.5B on infrastructure, with state and local governments accounting for 34.8% of that amount.

As of 2022, about 40% of scientific research aimed at generating new knowledge has been funded by the federal government—a percentage that has decreased from a high of 72% in 1967.

Germany is pursuing its most significant military buildup since WWII.

Transit is funded through a three-tier system, and the federal government is the smallest piece

In 2019, the federal government covered about one-sixth of the $79B spent on public transit. States and localities make up the rest. About 85% of all transit trips are taken by bus or heavy rail, and nearly 4 in 10 US transit trips occur in the New York City metro area.

In 2025, the US national debt per person was $113K.

New Deal programs still shape mandatory federal spending today

Many of the largest items in today's federal budget—especially mandatory programs—trace their origins to Franklin D. Roosevelt's New Deal. This podcast explores how those policies reshaped federal spending and government responsibility.

Key moments that shaped the national debt include the Civil War, both World Wars, the 2008 recession, and the COVID-19 pandemic.

One in seven US tax dollars is collected by local governments

Local governments collect about $886B each year to support education, infrastructure, and public health. Roughly three-quarters of this funding comes from property taxes, with the rest sourced from sales, excise, and income taxes.

The National Guard serves both state governors and presidents

Roughly 430,000 trained military personnel act as a strategic reserve for the US military, deployed domestically during natural disasters or unrest as well as overseas. It consists of the Army National Guard and the Air National Guard, overseen at the federal level by the National Guard Bureau.

Charting where federal revenue comes from

About 50 percent of federal revenue comes from individual income taxes, 7 percent from corporate income taxes, and another 36 percent from payroll taxes that fund social insurance programs. See breakdown in charts here.

Americans spent an estimated $14.8B for the Fourth of July 2025.

Many local governments also struggle to rein in their spending.

The federal agency dedicated to supporting museums and libraries spent $280M in 2024

The Institute of Museum and Library Services—a division of the National Endowment for the Arts and Humanities—administered $294M in FY 2024, accounting for nearly 40% of the National Endowment's total spending.

See how local, state, and federal governments divide the cost of public services

Federal, state, and local governments share responsibility for funding public services. Education, roads, and social programs are funded through a complicated mix of taxes and intergovernmental transfers.

See a chart that shows how the average American spends their annual earnings, with almost half of all American consumer spending going toward transportation and housing.

Most US fire departments are staffed entirely by volunteers, though they tend to serve smaller communities

According to the Federal Emergency Management Agency's 2024 registry, 70% of US fire departments are all volunteer, while 9.5% are fully staffed with paid employees. Volunteer departments are mainly found in rural and suburban areas, whereas most urban Americans are served by career or mixed departments.