US Federal Budget 2026 — Live Spending, Revenue & Deficit Tracker

FY2026 at a Glance — Fiscal Year Snapshot

Fiscal Year 2026 runs from October 1, 2025 through September 30, 2026. As of today, the federal government is 75% of the way through the fiscal year, with 275 days elapsed and 90 days remaining. Based on current spending and revenue run rates, the full-year projections are:

The FY2026 deficit of ~$1.8 trillion adds directly to the national debt, which now exceeds $39.4T. Interest payments on that debt — projected at $1.1 trillion this fiscal year — are themselves the third-largest budget line item and the fastest growing. For context: the entire defense budget is roughly $895 billion; the federal government now spends more servicing its debt than it does on national defense.

Mandatory vs. Discretionary Spending — The Most Important Budget Distinction

The single most important concept for understanding the federal budget is the divide between mandatory and discretionary spending — because only one of them is actually voted on each year.

Mandatory spending (~73% of the budget, ~$5.6T in FY2026) is governed by permanent law. Congress established the rules — who is eligible, how much they receive, how benefits adjust for inflation — and the Treasury pays automatically, year after year, without any annual vote. The three pillars of mandatory spending are:

• Social Security (~$1.6T): Monthly retirement and disability benefits for ~70 million Americans. Spending grows automatically as the Baby Boomer cohort ages into eligibility and as the annual cost-of-living adjustment (COLA) increases benefits with inflation.
• Medicare & Medicaid (~$1.7T combined): Federal health insurance for seniors (Medicare) and low-income Americans (Medicaid). Per-enrollee costs and the number of enrollees both rise year over year, compounding the growth rate.
• Interest on the Debt (~$1.1T): The interest bill on $39.4T in outstanding Treasury bonds. This is not a policy choice — it is a contractual obligation that must be paid or the US defaults. As existing low-rate debt matures and refinances at current higher rates, this figure rises regardless of what Congress does.

Discretionary spending (~27% of the budget, ~$2.1T in FY2026) is what Congress actually controls through the annual appropriations process. It is divided into:

• Defense discretionary (~$895B, ~12% of total budget): The Pentagon, military pay, weapons systems, overseas operations, and veterans' benefits not covered under mandatory law.
• Non-defense discretionary (~$1.2T, ~16% of total budget): Everything else the government does — education, transportation, scientific research, food safety, national parks, the FBI, NASA, foreign aid, and hundreds of other programs.

The fiscal math is stark: even if Congress eliminated all non-defense discretionary spending — shuttered every domestic agency, zeroed out education and transportation and research — it would close only about half the current deficit. Meaningful deficit reduction requires either reforming the mandatory programs or raising revenues. That is why deficit reduction is so politically difficult: the biggest items are the most popular programs.

Federal Budget Breakdown by Category — FY2026

Projected FY2026 spending of ~$7.7T, by major category. Bars normalized to the largest category.

Source: OMB FY2026 Budget · CBO January 2026 Baseline · Figures projected from YTD actuals · "Other Mandatory" includes income security, veterans, SNAP, earned income tax credit, child tax credit, and federal employee retirement

Where the Money Comes From — Federal Revenue Breakdown

The federal government collects revenue primarily through three channels: individual income taxes, payroll taxes, and corporate income taxes. In FY2026, projected total revenues are ~$5.9T.

Individual income taxes are the largest revenue source at ~49% — a progressive system with marginal rates from 10% to 37%. The top 1% of earners pay approximately 42% of all individual income taxes; the top 10% pay roughly 74%. Payroll taxes at 36% fund Social Security (12.4%, split equally between employer and employee) and Medicare (2.9%), and are capped at $176,100 for the Social Security portion in 2026. Corporate taxes were cut from 35% to 21% by the Tax Cuts and Jobs Act of 2017, reducing the corporate share of federal revenues significantly — corporations contributed about 32% of federal revenues in the 1950s compared to ~10% today.

Source: IRS / Treasury / CBO FY2026 baseline · Percentages rounded

Historical Federal Deficits & Surpluses — FY1970 to FY2025

Annual federal finances since 1970. Surplus years (FY1998–FY2001) highlighted in green. Crisis years (FY2009 — financial crisis, FY2020 — COVID) highlighted in red. The US has run a deficit in 50 of the last 55 fiscal years.

Source: OMB Historical Tables · CBO · Treasury · Surplus years (FY1998–FY2001) in green · Crisis years (FY2009, FY2020) in red · FY2025–2026 estimated

How the Federal Budget Process Works

The federal budget process is constitutionally rooted: Article I gives Congress the "power of the purse," and no federal money may be spent without a Congressional appropriation. In theory, the process follows a structured annual calendar. In practice, it has been functionally broken for decades.

Step 1 — Presidential Budget Request (February): The President submits a detailed budget proposal to Congress by the first Monday in February. This is a wish list, not law — Congress is not required to follow it and rarely does. The President's budget signals administration priorities and serves as the opening position in negotiations.

Step 2 — Congressional Budget Resolution (April 15 deadline): The House and Senate Budget Committees draft a concurrent resolution setting overall spending and revenue targets. This resolution does not become law (the President does not sign it) but instructs other committees how much they can spend. Congress has missed the April 15 deadline in most recent years.

Step 3 — Twelve Appropriations Bills (by September 30): Congress is supposed to pass 12 separate spending bills — one for each major area of government — before the fiscal year ends on September 30. Each bill funds agencies for the upcoming year. This is where actual spending levels are set for discretionary programs.

Step 4 — What Actually Happens: Continuing Resolutions and Omnibus Bills: Congress has passed all 12 appropriations bills on time only four times since 1977. What typically happens instead: Congress passes a continuing resolution (CR) — a stopgap measure that funds the government at current levels, usually for a few weeks or months — while negotiations continue. When negotiations collapse, a government shutdown occurs: non-essential federal workers are furloughed, and "non-essential" services stop. Eventually, Congress often rolls all 12 bills into a single massive omnibus spending bill, sometimes thousands of pages long, voted on hours before a deadline with minimal scrutiny.

The dysfunction has real costs: government shutdowns disrupt federal services, uncertainty about funding delays agency planning, and last-minute omnibus bills are poorly scrutinized. The underlying driver is that mandatory spending — Social Security, Medicare, Medicaid, and interest — runs on autopilot regardless of whether Congress passes appropriations. Only the discretionary 27% of the budget is actually subject to the annual process that is supposed to govern federal spending.