The
Government's
Money
In fiscal year 2025, the United States federal government collected $5.235 trillion and spent $7.010 trillion — borrowing $1.775 trillion to cover the gap. Net interest on the national debt surpassed $1 trillion for the first time in American history. The 2026 projected deficit is $1.9 trillion, and by 2036, public debt is forecast to reach 120% of GDP. This is the definitive analysis of where the money comes from, where it goes, and what happens if the trajectory doesn't change.
$7 Trillion Out,
$5.2 Trillion In
The federal government of the United States operates the largest single-entity budget in the history of human civilization. In fiscal year 2025 — which ran from October 1, 2024 through September 30, 2025 — the federal government collected $5.235 trillion in revenue and spent $7.010 trillion providing services, paying benefits, funding the military, servicing debt, and supporting state and local governments. The gap — $1.775 trillion — was borrowed, adding to a national debt that now exceeds $36 trillion and approaches 101% of GDP. For the first time in American history, the annual interest payment on that debt surpassed $1 trillion in a single fiscal year.
These numbers are not abstract statistics. They represent the financial decisions of a democracy: what the people, through their elected representatives, choose to fund, how they choose to fund it, and how much of the cost they choose to defer to future generations. Understanding the US federal budget — where the money comes from, where it goes, why it consistently falls short, and where the trajectory leads — is fundamental to understanding American politics, economics, and national security in 2026.
This analysis covers the full picture: every major revenue source, every major spending category, the deficit's history and current trajectory, the impact of the 2025 One Big Beautiful Bill Act, the role of tariffs, and the 10-year projections that describe the fiscal landscape of the next decade. The numbers tell a story that is simultaneously impressive in its scale and deeply concerning in its trajectory.
$5.235 Trillion:
Federal Revenue Decoded
The federal government raises revenue from six primary sources. In FY2025, the three largest — individual income taxes, payroll taxes, and corporate income taxes — together accounted for approximately 90% of all federal receipts. The composition of that revenue matters enormously: it determines who bears the tax burden, how sensitive revenue is to economic fluctuations, and how the revenue base responds to policy changes like tariffs and tax reform.
The Individual Income Tax — The Government's Primary Engine
Individual income taxes — the progressive levy on wages, salaries, investment income, and business profits — generate approximately 51% of all federal revenue. This single revenue source produced roughly $2.67 trillion in FY2025, more than the entire GDP of France. The progressive nature of this tax means the top 1% of earners pay more than 40% of all individual income taxes collected, creating an extraordinary concentration of government revenue dependency on a small number of high-income households and their financial market performance.
Revenue from individual income taxes rose in FY2025 driven by increases in taxable wages, strong employment, and elevated capital gains income — though collections are highly sensitive to market conditions. A significant stock market decline can reduce capital gains realizations, which rapidly reduces individual income tax revenue even without any change in tax rates.
Payroll Taxes — The Invisible Tax Most Americans Pay Most
Payroll taxes — the 7.65% FICA contribution from every employee's paycheck, matched by employers — generated approximately $1.78 trillion in FY2025, or 34% of federal revenue. These taxes are dedicated by law to Social Security and Medicare trust funds. They are the most universal federal tax: a minimum-wage worker pays the same 7.65% rate as a middle-class professional (up to the Social Security wage cap of $176,100 in 2025). In fact, for the bottom 90% of Americans by income, payroll taxes typically exceed federal income taxes — they are the primary federal tax burden of working Americans.
Customs Duties Jumped 130% in a Single Month — What the Tariff Numbers Mean
In April 2025 alone, customs duties rose by $8 billion — a 130% increase from the same month in the prior year — as the Trump administration's broad tariff programme took full effect. Excise taxes also rose 55% in the same month. For the full FY2025, customs duties totalled less than 4% of federal revenues. But the Bipartisan Policy Center projects that the new tariff regime will significantly reshape the revenue mix going forward — the CBO estimates higher tariffs reduced projected cumulative deficits by $3.0 trillion over 2025–2034, a significant offset to other deficit-increasing policies. However, tariffs also raise prices for American consumers and businesses — so their net economic benefit is contested.
Corporate Income Tax — A Declining Giant
Corporate income taxes generated approximately 9% of federal revenue in FY2025 — a dramatic decline from the 1960s when corporate taxes contributed nearly 23% of federal revenue. The decline reflects decades of rate reductions (the 2017 Tax Cuts and Jobs Act cut the corporate rate from 35% to 21%), increased use of tax deductions, offshore profit shifting by multinationals, and the growth of pass-through businesses whose profits flow through to individual tax returns. The One Big Beautiful Bill Act (OBBBA) enacted in July 2025 maintained the 21% corporate rate while extending various business deductions — affecting corporate receipts going forward.
$7.010 Trillion:
Federal Spending Decoded
Federal spending falls into three broad categories: mandatory spending (programmes governed by permanent law, like Social Security and Medicare, which automatically pay eligible beneficiaries regardless of annual budget decisions), discretionary spending (programmes funded annually through the appropriations process, including defence and most government agencies), and net interest (the cost of servicing the national debt). In FY2025, mandatory spending was approximately 59% of total outlays — a proportion that has grown steadily for decades and is projected to continue rising.
For the First Time in American History, Debt Interest Rivals the Pentagon Budget
Net interest on the public debt surpassed $1 trillion in FY2025 for the first time in American history. To put this in perspective: the US government now spends as much on interest payments as it does on the entire Department of Defence's base budget. This $1 trillion goes to bondholders — domestic and international — and produces zero government services, zero infrastructure, zero healthcare, and zero defence capability. It is the direct cost of accumulated deficit spending. As the debt grows and if interest rates remain elevated, this number will grow further — potentially crowding out spending on everything from education to research to defence. The Committee for a Responsible Federal Budget calls it "simply unsustainable."
From Surplus to
Permanent Deficit
The current era of structural deficits has not always been America's fiscal reality. The US ran balanced budgets or surpluses for much of the 19th and early 20th centuries, and briefly achieved surpluses again at the end of the 1990s under President Clinton. Understanding how the country moved from surplus to multi-trillion-dollar annual deficits requires understanding both the spending drivers and the revenue choices that have accumulated over three decades.
Three structural forces — each politically popular, economically defensible in isolation, but collectively unsustainable — explain the transition from Clinton-era surpluses to multi-trillion-dollar structural deficits. The 2001–2003 Bush tax cuts reduced revenues without equivalent spending cuts. The post-9/11 wars added $2+ trillion in unfunded military spending. And the 2008 financial crisis required emergency stimulus spending that reset the baseline permanently upward. Superimposed on these one-time events, the ageing of the Baby Boom generation has relentlessly grown mandatory spending on Social Security and Medicare — a demographic wave that was entirely predictable and largely unaddressed by policy.
$36 Trillion:
The Debt Trajectory
The national debt — the accumulated total of all annual deficits since the founding of the republic — has crossed $36 trillion and now stands at approximately 101% of GDP. The Congressional Budget Office projects that public debt will rise to 120% of GDP by 2036 under current law — well above the previous post-World War II record of 106% set in 1946. Unlike WWII debt, which was rapidly paid down as the economy boomed and spending was cut, today's debt is driven by structural demographic forces and legal spending commitments that create a self-reinforcing upward trajectory even in the absence of new crises.
The One Big Beautiful Bill:
Fiscal Consequences
The most significant fiscal legislation since the 2017 Tax Cuts and Jobs Act was the One Big Beautiful Bill Act (OBBBA), enacted in July 2025. The CBO estimates that the act's combined tax and spending provisions will increase deficits through FY2034 by $4.2 trillion relative to its January 2025 baseline projections, with OBBBA's debt-service costs raising the total impact on deficits by $4.7 trillion over the 2025–2034 period. Three major policy changes, working in different directions, account for the net fiscal impact:
State & Local Government:
The Other Layer
Federal government finances represent only part of the total government income and expenditure picture in the United States. State and local governments — 50 states, approximately 3,000 counties, 19,000 municipalities, and 14,000 school districts — collectively spend approximately $4.5 trillion per year and raise revenues of similar magnitude. Unlike the federal government, most state constitutions require balanced operating budgets. This creates a very different fiscal dynamic: states cannot print money or run structural deficits in their general funds.
| Government Level | Annual Revenue | Annual Spending | Deficit Ability? | Primary Revenue Source | Primary Spending Category |
|---|---|---|---|---|---|
| Federal Government | $5.235T (FY2025) | $7.010T (FY2025) | Yes — unlimited | Individual income tax (51%) | Social Security + Medicare (34%) |
| State Governments (combined) | ~$2.5–2.8T | ~$2.5–2.8T | Mostly No — balanced budget rules | Federal grants + income/sales tax | Education + Medicaid |
| Local Governments (combined) | ~$2.0–2.2T | ~$2.0–2.2T | Mostly No — balanced budget rules | Property tax + state aid | K-12 Education + Infrastructure |
| Total Government (all levels) | ~$9.7–10T | ~$11.5–12T | Only Federal level runs deficits | Individual income tax (combined) | Healthcare + Education + Defence |
2026–2036:
The Fiscal Horizon
The CBO's Budget and Economic Outlook 2026–2036 paints a sobering picture. Deficits are large by historical standards. The deficit totals $1.9 trillion in fiscal year 2026 and grows to $3.1 trillion in 2036. Relative to the size of the economy, the deficit is 5.8 percent of GDP in 2026 and increases to 6.7 percent in 2036. Deficits averaged 3.8 percent of GDP over the last 50 years. Public debt rises from 101% of GDP in 2026 to 120% in 2036 — well above the previous post-WWII record.
The CBO's long-term outlook (30-year projection) is particularly stark: total deficits averaging 7.2% of GDP over 2026–2056, with public debt swelling from 100% of GDP in 2026 to 175% of GDP by 2056. At some level of debt, interest costs can consume such a large share of the budget that they crowd out nearly all other government functions — a fiscal crisis scenario that most economists consider unlikely in the near term for the US but increasingly less dismissible as debt levels rise.
What Can Be Done?
The Hard Choices
The fiscal trajectory can be changed. But doing so requires addressing the structural mismatch between revenues and spending — which means confronting politically protected programmes, raising revenues, or accepting higher debt levels indefinitely. Here is an honest accounting of the available tools and their political constraints.
That pace — if sustained — produces a $2 trillion deficit
before a single new programme is created.
The United States federal budget in 2025–2026 tells two simultaneous stories. The first is a story of extraordinary government capacity: $5.235 trillion in annual revenue — the largest tax collection in American history — funding a security apparatus that deters great-power conflict, a healthcare system that covers 130 million Americans through Medicare and Medicaid, a retirement income programme that lifts tens of millions out of poverty, and an infrastructure and research investment that sustains global technological leadership. By these measures, the US federal government is an operational success of enormous scale.
The second story is a structural fiscal crisis developing in slow motion. Net interest on the debt crossed $1 trillion for the first time in American history in FY2025. The CBO projects deficits growing from $1.9 trillion in 2026 to $3.1 trillion in 2036. Public debt is rising toward 120% of GDP by 2036 — and 175% by 2056 in the long-term projection. The One Big Beautiful Bill Act's tax provisions will add an estimated $4.7 trillion to cumulative deficits, partially offset by tariff revenues but subject to significant legal uncertainty following the February 2026 Supreme Court ruling on IEEPA tariff authority.
The two stories are connected: the fiscal crisis is primarily a product of decisions that made the first story possible — politically popular tax cuts that reduced revenues and politically popular benefit expansions that increased spending, both made affordable in the short term by borrowing at what were historically low interest rates. Now that interest rates have normalised and the Baby Boom demographic wave is cresting, the bill is arriving. Whether the United States can address the structural mismatch between revenues and spending — the gap between what the government promises and what it collects — without a fiscal crisis is the defining domestic policy question of the coming decade.
