A national budget is a government's annual financial plan — projecting revenues, authorizing spending, and revealing fiscal priorities. Here's how budgets work in practice.
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A national budget is a government's annual financial plan — projecting revenues (taxes, fees, borrowing) and planned expenditures for the coming fiscal year. It is simultaneously a financial statement, a policy document, and a political manifesto: the numbers reveal what a government actually prioritizes.
For the United States, the budget process begins each February when the president submits a proposal to Congress. Congress is not required to adopt it — and typically doesn't. Through the appropriations process, Congress passes its own spending bills. The budget the president submits is a starting point; the enacted budget is the result of extended negotiation.
U.S. federal revenue in FY2024 was approximately $4.9 trillion:
Individual income taxes (~49%): The largest single source. Federal income tax rates are progressive — rising from 10% on the lowest bracket to 37% on income above $609,000. The effective rate (actual taxes paid as a percentage of income) is lower due to deductions and credits.
Payroll taxes (~36%): FICA taxes fund Social Security (6.2% employee + 6.2% employer, capped) and Medicare (1.45% each, uncapped). These appear on every paycheck as separate line items.
Corporate income taxes (~10%): Taxed at 21% (reduced from 35% by the 2017 Tax Cuts and Jobs Act). Volatile — rising with profits and falling during recessions.
Excise taxes, estate taxes, customs duties (~5%): Taxes on fuel, alcohol, tobacco, and estates.
U.S. federal spending in FY2024 was approximately $6.8 trillion — a $1.9 trillion deficit:
Social Security (~21%): Monthly payments to 67 million+ retirees, disabled workers, and survivors. Funded by payroll taxes on a pay-as-you-go basis.
Healthcare — Medicare, Medicaid, CHIP (~25%): Covers approximately 140 million Americans. The fastest-growing major budget category.
Defense (~13%): Approximately $886 billion including nuclear weapons and related security spending.
Interest on debt (~13%): Approximately $870 billion — now exceeding defense spending and growing rapidly as the debt stock expands and rates have risen from near-zero.
Everything else (~28%): Education, transportation, veterans benefits, foreign aid, scientific research, federal employee retirement.
The single most important fiscal fact in American public finance: the U.S. spends approximately $1.9 trillion more than it collects annually, financing the gap by issuing Treasury bonds. This deficit adds to the $34+ trillion national debt, generating interest expense that is the fastest-growing budget line item. See how deficit spending works, where tax dollars go, and government borrowing and interest rates.