Federal Budget and National Debt

The federal budget is both a financial plan and a political document — a detailed statement of national priorities expressed in dollars. Each year, the President proposes a budget, Congress enacts spending legislation, and federal agencies execute the programs those laws fund. The process is governed by a complex framework of statutes, rules, and customs that distribute budgetary authority across the executive and legislative branches. The national debt — the cumulative result of decades of annual deficits — has grown to exceed $34 trillion, making fiscal policy one of the most consequential areas of governance. This page examines the budget process from beginning to end, the distinction between mandatory and discretionary spending, the role of the Congressional Budget Office, the mechanics of the debt ceiling, and the fiscal outlook facing the nation.

Constitutional Foundation

Article I, Section 9 of the Constitution provides that "No Money shall be drawn from the Treasury, but in Consequence of Appropriations made by Law." This clause establishes the fundamental principle that all federal spending requires legislative authorization. Article I, Section 7 requires that all bills for raising revenue originate in the House of Representatives — a provision that gives the House a traditional, though not always exercised, priority in tax and budget matters. Article I, Section 8 grants Congress the power to "lay and collect Taxes, Duties, Imposts and Excises, to pay the Debts and provide for the common Defence and general Welfare of the United States."

The President's role in the budget process is not constitutionally specified beyond the general executive power and the veto authority. The modern presidential budget process was created by statute — primarily the Budget and Accounting Act of 1921, which required the President to submit an annual budget proposal to Congress and created the Bureau of the Budget (reorganized as the Office of Management and Budget in 1970) to assist in its preparation.

The Budget Process

The annual federal budget process involves multiple stages spanning approximately 18 months from initial preparation to final enactment. In practice, the process rarely operates according to its statutory timetable, and significant portions of federal spending are enacted outside the regular budget process.

The Presidential Budget Proposal

The Budget and Accounting Act of 1921, as amended by the Congressional Budget and Impoundment Control Act of 1974, requires the President to submit a budget proposal to Congress on or before the first Monday in February. The presidential budget is prepared by the Office of Management and Budget (OMB) in coordination with federal agencies. The document contains detailed revenue and spending projections, policy proposals, and economic assumptions covering the upcoming fiscal year (which begins on October 1) and at least the following four fiscal years.

The presidential budget is a request, not a binding legal document. Congress is not obligated to adopt the President's proposals and frequently departs from them substantially. The budget nonetheless serves important functions: it articulates the administration's priorities, provides a detailed baseline for congressional deliberation, and generates the economic and fiscal assumptions that frame the year's budget debate.

The Congressional Budget Resolution

The Congressional Budget Act of 1974 (Title III of the Congressional Budget and Impoundment Control Act, 2 U.S.C. sections 631-645) established the framework for congressional budget action. Under this framework, the House and Senate Budget Committees draft a concurrent budget resolution that sets overall spending and revenue targets for the upcoming fiscal year and at least the following four years. The budget resolution allocates spending among 20 functional categories (such as national defense, health, income security, and net interest) and establishes aggregate levels of budget authority, outlays, revenues, deficit or surplus, and debt.

The budget resolution is a concurrent resolution, not a law — it does not require the President's signature and does not have the force of law. It serves as an internal congressional planning document that establishes the framework within which the Appropriations Committees and other committees operate. In practice, Congress has frequently failed to adopt a budget resolution, particularly in years of divided government, relying instead on "deeming resolutions" that set spending levels without a formal budget agreement.

Appropriations

Discretionary spending — spending that is controlled through the annual appropriations process — is enacted through 12 regular appropriations bills, each covering a specific area of government. The House and Senate Appropriations Committees, working through their 12 subcommittees, draft these bills within the spending limits (known as 302(a) and 302(b) allocations) set by the budget resolution. Each appropriations bill must pass both chambers and be signed by the President before the start of the fiscal year on October 1.

In practice, Congress has completed all 12 regular appropriations bills on time in only four of the past 47 fiscal years (since the modern budget process was established in 1976). When appropriations bills are not enacted by October 1, Congress typically passes a continuing resolution (CR) — a temporary measure that funds government operations at a specified level (usually the prior year's level) for a limited period. If neither regular appropriations nor a continuing resolution is in effect, a funding gap occurs and the government experiences a partial or full shutdown, during which non-essential government functions are suspended and affected federal employees are furloughed.

Budget Reconciliation

Budget reconciliation is a special legislative procedure created by the Congressional Budget Act that allows Congress to implement budget-related policy changes through an expedited process. Reconciliation bills are not subject to a Senate filibuster and can pass with a simple majority vote (51 votes rather than the 60 typically needed to end debate in the Senate). This makes reconciliation a powerful tool for enacting significant fiscal policy changes when the majority party cannot achieve a filibuster-proof supermajority.

Reconciliation has been used to enact major legislation including the Omnibus Budget Reconciliation Act of 1993 (President Clinton's deficit reduction package), the Economic Growth and Tax Relief Reconciliation Act of 2001 (the Bush tax cuts), the Tax Cuts and Jobs Act of 2017, the American Rescue Plan Act of 2021, and the Inflation Reduction Act of 2022. The Byrd Rule (named for Senator Robert Byrd and codified at 2 U.S.C. section 644) limits the scope of reconciliation by prohibiting "extraneous" provisions — those that do not change spending or revenue, or whose budgetary effects are merely incidental to the broader policy change.

Mandatory vs. Discretionary Spending

Federal spending is divided into two fundamental categories: mandatory (or direct) spending and discretionary spending. Understanding this distinction is essential to understanding the federal budget because the two categories are governed by entirely different legislative processes and have very different fiscal trajectories.

Mandatory spending is spending that is controlled by permanent laws (authorizing statutes) rather than through the annual appropriations process. Major mandatory programs include Social Security (authorized by the Social Security Act), Medicare (authorized by Title XVIII of the Social Security Act), Medicaid (authorized by Title XIX), federal civilian and military retirement programs, Supplemental Nutrition Assistance Program (SNAP), unemployment compensation, and net interest on the national debt. Mandatory spending accounts for approximately two-thirds of total federal spending and is projected to grow as a share of the budget as the population ages and health care costs increase. Changing mandatory spending levels requires amending the underlying authorizing statute.

Discretionary spending is spending that is controlled through the annual appropriations process. It includes defense spending (approximately half of total discretionary spending) and non-defense discretionary spending, which funds federal agencies, education programs, transportation infrastructure, scientific research, veterans' health care, law enforcement, foreign aid, and most other federal activities that are not entitlement programs. Discretionary spending accounts for approximately one-third of total federal spending and has been declining as a share of the budget and of GDP over the past several decades as mandatory spending has grown.

Sequestration and Spending Controls

Sequestration is a mechanism for enforcing budgetary limits through automatic, across-the-board spending cuts. It was first established by the Balanced Budget and Emergency Deficit Control Act of 1985 (Gramm-Rudman-Hollings) and was most recently triggered by the Budget Control Act of 2011 (BCA). The BCA established caps on discretionary spending for fiscal years 2012 through 2021 and created a "supercommittee" tasked with identifying additional deficit reduction. When the supercommittee failed to reach agreement, the BCA's automatic sequestration provisions took effect, imposing across-the-board cuts to both defense and non-defense discretionary spending beginning in fiscal year 2013.

Sequestration operates as a blunt instrument — it cuts all programs within a category by the same percentage, without regard to the relative importance or effectiveness of different programs. Certain programs are exempt from sequestration (including Social Security, Medicaid, and certain veterans' programs), while others (including Medicare) are subject to limited sequestration (Medicare payments to providers can be reduced by no more than 2 percent). Congress has repeatedly modified the BCA caps through bipartisan agreements, most significantly through the Bipartisan Budget Act of 2013 and the Bipartisan Budget Act of 2019, which raised the caps for specific fiscal years.

The Fiscal Responsibility Act of 2023, enacted after a debt ceiling standoff, established new discretionary spending limits for fiscal years 2024 and 2025, with sequestration serving as the enforcement mechanism if spending exceeds the caps.

The Debt Ceiling

The debt ceiling, or debt limit, is the maximum amount of money the federal government is authorized to borrow to meet its existing obligations. First established in 1917 by the Second Liberty Bond Act, the debt ceiling is set by statute and must be raised by Congress through legislation signed by the President whenever outstanding federal debt approaches the limit.

The debt ceiling does not authorize new spending or new borrowing. It permits the Treasury to borrow money to pay for spending that Congress has already authorized through appropriations and mandatory spending laws. When the debt ceiling is reached, the Treasury Department employs "extraordinary measures" — accounting maneuvers that temporarily free up borrowing capacity under the ceiling — to continue paying obligations for a limited period. If the debt ceiling is not raised before extraordinary measures are exhausted, the federal government would be unable to meet all of its obligations, potentially resulting in a default on the national debt.

No debt ceiling default has ever occurred. However, brinkmanship around debt ceiling increases has produced significant economic and financial consequences. In 2011, the prolonged debt ceiling standoff led Standard & Poor's to downgrade the United States' credit rating from AAA to AA+ for the first time in history. The 2023 debt ceiling standoff was resolved through the Fiscal Responsibility Act, which suspended the debt ceiling through January 1, 2025, and established new discretionary spending limits.

The Congressional Budget Office and Scoring

The Congressional Budget Office (CBO), established by the Congressional Budget Act of 1974, is the nonpartisan analytical agency that provides Congress with economic and budgetary analysis. CBO performs several critical functions in the budget process: it produces baseline budget projections that estimate federal spending, revenue, and deficits under current law; it "scores" proposed legislation — estimating its budgetary impact over a 10-year window; and it produces economic forecasts that inform congressional deliberations.

CBO scoring is consequential because congressional budget rules frequently require that new legislation be "paid for" — that any increase in spending or decrease in revenue be offset by corresponding savings elsewhere. The Statutory Pay-As-You-Go Act of 2010 (Statutory PAYGO) requires that the combined budgetary effects of all legislation enacted during a session of Congress not increase the projected deficit over a five-year or ten-year period, with automatic across-the-board spending reductions triggered if this requirement is violated. In practice, Congress has frequently waived PAYGO requirements for major legislation.

CBO's estimates have been the subject of debate, particularly regarding "dynamic scoring" — the question of whether budget estimates should incorporate the macroeconomic effects of proposed policy changes. Traditional CBO scoring assumes a fixed economic baseline and estimates the direct budgetary impact of policy changes. Dynamic scoring attempts to model how policy changes would affect economic growth, employment, and other macroeconomic variables, and incorporates those effects into the budgetary estimate. CBO now produces dynamic analyses (formally termed "macroeconomic feedback analyses") for major legislation at the request of the Budget Committee chairs, though these analyses are supplementary to, rather than replacements for, conventional scores.

Federal Revenue

Federal revenue comes primarily from individual income taxes (approximately 49 percent of total revenue in fiscal year 2023), payroll taxes for Social Security and Medicare (approximately 36 percent), corporate income taxes (approximately 10 percent), and a combination of excise taxes, estate and gift taxes, customs duties, and miscellaneous receipts (approximately 5 percent). Total federal revenue was approximately $4.4 trillion in fiscal year 2023, representing approximately 16.5 percent of GDP — below the 50-year historical average of approximately 17.3 percent of GDP.

The individual income tax is progressive, with marginal rates in 2024 ranging from 10 percent on the first $11,600 of taxable income for single filers to 37 percent on taxable income above $609,350. The Tax Cuts and Jobs Act of 2017 (TCJA) reduced individual income tax rates across most brackets, nearly doubled the standard deduction, limited the state and local tax (SALT) deduction to $10,000, and reduced the corporate tax rate from 35 percent to 21 percent. Many of the individual provisions of the TCJA are scheduled to expire after 2025, which will require Congress to decide whether to extend, modify, or allow the provisions to lapse — a decision with significant budgetary and distributional consequences.

The National Debt

The national debt — formally, the total outstanding public debt of the United States — exceeded $34 trillion in January 2024. The debt consists of two components: debt held by the public (approximately $27 trillion), which represents borrowing from individuals, corporations, foreign governments, and other external creditors through the sale of Treasury securities; and intragovernmental debt (approximately $7 trillion), which represents obligations to government trust funds, primarily the Social Security and Medicare trust funds.

The debt-to-GDP ratio — the standard measure of a nation's debt burden relative to its economic capacity — stood at approximately 97 percent at the end of fiscal year 2023 for debt held by the public. CBO projects that under current law, debt held by the public will rise to approximately 116 percent of GDP by 2034 and continue to grow thereafter, driven primarily by the structural mismatch between projected spending growth (mainly in mandatory programs and net interest) and projected revenue. By 2053, CBO projects debt held by the public could reach 181 percent of GDP under current law.

Net interest on the national debt has become an increasingly significant budgetary item as both the debt level and interest rates have risen. In fiscal year 2023, net interest payments totaled approximately $659 billion — more than the federal government spent on defense. CBO projects that net interest costs will continue to grow, consuming an increasing share of federal revenue and crowding out other spending priorities.

The long-term fiscal outlook raises fundamental questions about the sustainability of current federal spending and tax policies. Economists disagree about the level of debt that constitutes a danger to economic stability, but there is broad consensus that a continuously rising debt-to-GDP ratio is unsustainable over the long term because it increases the risk of a fiscal crisis, reduces the government's flexibility to respond to future economic downturns or national emergencies, and diverts an increasing share of the budget from productive public investments to debt service. Addressing the long-term fiscal imbalance will require some combination of spending reductions, revenue increases, and economic growth — choices that are ultimately political and will reflect the nation's collective judgment about the size and scope of government.