- The US federal budget process begins with the president's budget proposal (typically February) — which Congress then modifies through its own appropriations process.
- Mandatory spending (Social Security, Medicare, Medicaid) and interest payments consume over 75% of the budget — leaving discretionary spending (defense + everything else) subject to annual negotiation.
- Congress hasn't passed a full-year budget on time since 1997 — relying on continuing resolutions that fund the government at prior-year levels.
- The debt ceiling — a separate legislative constraint on total borrowing — creates periodic fiscal crises when Congress must vote to raise it to avoid default.
The Budget Process Step by Step
President's Budget Proposal (February)
The Office of Management and Budget (OMB), working with the president, submits a detailed budget proposal to Congress in early February. This is not a law — Congress is not required to follow it and often ignores large parts of it. But it signals the administration's priorities, sets the terms of debate, and contains detailed proposals for every federal agency. The president's budget typically runs thousands of pages.
Congressional Budget Resolution (Spring)
The House and Senate Budget Committees draft a concurrent budget resolution establishing overall spending and revenue targets for the coming fiscal year. Unlike most legislation, the budget resolution does not go to the president for signature — it is purely internal congressional planning. It sets 302(a) allocations: overall spending levels divided among the appropriations, agriculture, armed services, and other committees. The budget resolution also provides the budget reconciliation instructions if Congress plans to use the reconciliation process.
12 Appropriations Bills (Spring–Summer)
The House and Senate each have an Appropriations Committee with 12 subcommittees. Each subcommittee is responsible for one appropriations bill covering a specific area of government. The 12 bills cover: Agriculture; Commerce/Justice/Science; Defense; Energy/Water; Financial Services; Homeland Security; Interior/Environment; Labor/HHS/Education; Legislative Branch; Military Construction/VA; State/Foreign Operations; and Transportation/HUD. Each bill must pass both chambers and be signed by the president. In practice, Congress frequently packages several bills together into an "omnibus" package.
Continuing Resolutions and Shutdowns (October and after)
When Congress does not pass appropriations bills by October 1 — which is nearly every year — it passes a continuing resolution (CR) to temporarily fund the government at existing levels. CRs avoid shutdowns but prevent new programs from starting and create uncertainty for agencies. If Congress fails to pass either appropriations bills or a CR before funding runs out, the government shuts down: non-essential federal workers are furloughed, national parks close, and some services stop. Major shutdowns occurred in 2013 (16 days), 2018-2019 (35 days — the longest ever), and several others.
Mandatory vs. Discretionary Spending
Not all federal spending goes through the annual appropriations process. About two-thirds of federal spending is mandatory — it flows automatically based on eligibility rules set in permanent law, regardless of what Congress does in the annual budget process.
The major mandatory programs are Social Security ($1.4 trillion annually), Medicare ($900 billion), and Medicaid ($600+ billion). Anyone who qualifies gets the benefit — there is no annual cap. Congress does not vote each year on how much Social Security to spend; it simply flows. Changing mandatory spending requires changing the underlying laws that created the programs.
Discretionary spending — about one-third of the budget — is what goes through the annual appropriations process: defense, education, transportation, housing, research agencies, and everything else. Defense alone accounts for about half of all discretionary spending.
Interest on the national debt is a third category that is neither mandatory nor discretionary in the traditional sense — it is an obligation that must be paid regardless of political preferences. As interest rates rose from near zero to 5%+ between 2022 and 2024, interest costs surged past $1 trillion annually for the first time, surpassing the defense budget.
Budget Reconciliation: The 51-Vote Shortcut
Most Senate legislation requires 60 votes to overcome a filibuster. But the Congressional Budget Act of 1974 created a special process — budget reconciliation — that allows the Senate to pass budget-related legislation with a simple majority of 51 votes. This is because the budget resolution, which sets the overall framework, passes by simple majority, and reconciliation bills must comply with it.
Reconciliation bills must comply with the Byrd Rule, named for longtime Senate Budget Committee Chairman Robert Byrd of West Virginia. The Byrd Rule prohibits "extraneous" provisions — things that have no budgetary effect, increase the deficit beyond the budget window without a sunset, or change Social Security. Any provision that violates the Byrd Rule is subject to a "Byrd Bath" — it gets stripped out unless 60 senators vote to waive the rule.
This is why reconciliation bills always expire: the 2001 and 2003 Bush tax cuts were passed via reconciliation with 10-year sunsets, which is why they were scheduled to expire in 2010 and 2012 (and were extended). The 2017 Trump tax cuts also used reconciliation and expire after 2025 — which is why extending them is the primary goal of the 2026 "big beautiful bill."
2026 Context: The "Big Beautiful Bill"
Republicans are using reconciliation in 2025-2026 to pass what Trump calls the "big beautiful bill" — a comprehensive legislative package that combines extending the 2017 Tax Cuts and Jobs Act (TCJA), new tax breaks (no tax on tips, overtime, Social Security benefits), significant spending cuts to Medicaid and other programs, and a debt ceiling increase.
Because Republicans control 53 Senate seats and are using reconciliation, Democrats cannot filibuster the bill. The challenge for Republicans is internal: the spending cuts needed to satisfy fiscal conservatives (who want to reduce the deficit) conflict with the tax cuts favored by most of the caucus. The Congressional Budget Office estimated early versions of the bill would add $3 to $5 trillion to the national debt over 10 years.
The Medicaid cuts — which include work requirements and per-capita caps — are among the most politically sensitive provisions. CBO analyses suggested they would result in millions of Americans losing healthcare coverage. Republican House members from swing districts in 2026 are navigating the tension between their party's fiscal priorities and their constituents' reliance on Medicaid.
Frequently Asked Questions
How does the US federal budget process work?
The president submits a budget proposal in February. Congress passes a budget resolution setting overall levels. Then 12 appropriations subcommittees write 12 spending bills covering different parts of the government, all due before October 1. When this fails — which is almost every year — Congress passes continuing resolutions to keep the government funded. If no funding bill passes, the government shuts down.
What is the difference between the deficit and the national debt?
The deficit is the annual gap between spending and revenue — a single year's shortfall. The national debt is the cumulative total of all past deficits. A $2 trillion deficit in FY2025 adds $2 trillion to the total debt. The US national debt exceeded $36 trillion in 2026. Even if the US ran a balanced budget tomorrow, the existing debt and its interest obligations would remain.
What is a continuing resolution?
A continuing resolution is a temporary spending bill that keeps the government running at current funding levels when regular appropriations bills have not passed by the October 1 deadline. CRs typically last weeks or months. They prevent shutdowns but also prevent new spending priorities from being enacted. Congress has passed all 12 appropriations bills on time only four times in the last 45 years.
What is budget reconciliation and why does it matter in 2026?
Budget reconciliation allows the Senate to pass budget-related legislation with 51 votes instead of 60, bypassing the filibuster. In 2026, Republicans are using reconciliation to pass the "big beautiful bill" — extending the 2017 Trump tax cuts, adding new tax breaks, cutting Medicaid, and raising the debt ceiling. Because it only needs 51 Senate votes, Democrats cannot block it. The constraint is internal Republican unity.
