In fiscal year 2025, the federal government spent $1.83 trillion more than it collected — the equivalent of borrowing approximately $5 billion every day to keep the lights on. That figure, which represents 5.77% of gross domestic product, is the highest non-emergency peacetime deficit-to-GDP ratio on record, eclipsing every year outside the COVID-19 emergency and the 2008–2012 financial crisis period. According to FRED series FYFSGDA188S, the only comparable peacetime levels in modern history were the early 1980s recession years and the aftermath of the Great Recession. In 2007 — the last full year before the financial crisis — the deficit was just 1.11% of GDP.
But the size of the deficit alone does not tell the structural story. The more consequential question is what is driving it — and whether Congress has any room to change course through the appropriations process it controls each year.
The 86-Cent Problem
The federal budget is divided into three categories. Mandatory spending — Social Security, Medicare, Medicaid, and other entitlement programs — is set by statute and is not subject to annual appropriations. Net interest is the legally required cost of servicing accumulated debt. Discretionary spending — defense, education, transportation, scientific research, and all federal agencies — is what Congress actually votes on in the annual budget process.
In FY2025, mandatory programs consumed an estimated $4.5 trillion in outlays, while net interest on the federal debt added $970.4 billion — verified by FRED series FYOINT. Against total federal revenues estimated at approximately $5.17 trillion (derived from nominal GDP of ~$29.8 trillion at a historical revenue-to-GDP ratio of ~17.3%), the combined cost of mandatory spending and interest alone consumes roughly 106% of everything the government collects. Discretionary spending — roughly $1.5 trillion — is financed entirely by borrowing.
Put differently: even if Congress appropriated $0 in discretionary spending — eliminating all defense spending, all education funding, all transportation investment, and every federal agency — the United States government would still run a structural deficit approaching $300 billion per year from mandatory programs and interest alone. The discretionary debate, however loudly it dominates Washington, does not address the structural mathematics.
Even if Congress appropriated $0 in discretionary spending — eliminating defense, education, transportation, and all agency operations — the federal government would still run a deficit from mandatory programs and interest alone.
— GTP Analysis · Source: FRED FYFSGDA188S, FYOINT
The Interest Ratchet
Interest on the federal debt totaled $970.4 billion in FY2025 — up 176% from $352.3 billion in FY2021. The year-over-year growth rate has slowed from its peak (+38.6% in FY2023, +33.6% in FY2024) to +10.1% in FY2025, as the Federal Reserve's rate cuts moderated new issuance costs. But a slower growth rate does not mean the interest burden is declining — it means it is rising less rapidly.
The mechanism for continued pressure is what might be called the refinancing ratchet. According to U.S. Treasury average interest rate data for February 28, 2026, the weighted average interest rate on all outstanding federal debt is 3.320% — reflecting the mix of older low-rate bonds and newer higher-rate issuances. But the benchmark 10-year Treasury yield as of February 2026 stood at 4.13% (per FRED series GS10). Every bond that matures and gets refinanced at current market rates increases the total interest burden — regardless of whether the current year's deficit shrinks or grows.
$970.4B annual interest ÷ 365 days · Source: FRED FYOINT
Deficit as % of GDP — Historical Comparison
| Fiscal Year | Deficit / GDP | Context |
|---|---|---|
| FY2025 | -5.77% | Highest non-emergency peacetime level |
| FY2024 | -6.20% | Post-COVID normalization |
| FY2021 | -11.70% | COVID relief peak |
| FY2019 | -4.57% | Pre-COVID baseline |
| FY2015 | -2.42% | Post-ACA deficit reduction |
| FY2007 | -1.11% | Pre-financial crisis |
| FY2000 | +2.30% | Last surplus year |
The Debt-to-GDP Context
The accumulated consequence of chronic deficits is visible in the debt-to-GDP ratio. At 122.49% as of Q4 2025 (per FRED GFDEGDQ188S), the U.S. carries more debt than a full year of total economic output. The ratio has risen steadily from 118.78% in Q1 2025 and 105.78% in Q4 2019 — before the pandemic. For additional context on the GTP data dashboard's debt tab, the ratio has more than doubled since the pre-financial crisis level of 62.72% in Q4 2007.
The historical comparison that policymakers often invoke is the post-World War II peak, when debt-to-GDP briefly reached roughly 106% in 1946. What made that episode manageable — and ultimately temporary — was a combination of rapid economic growth and budget surpluses in the years that followed. The structural deficit dynamic of FY2025 provides neither lever. Debt-to-GDP cannot decline if the government runs a 5.77% deficit every year, regardless of economic growth.
Looking ahead, the Congressional Budget Office's projections under current law show interest as a share of GDP continuing to rise through the 2030s — a trajectory that will further compress the space available for discretionary priorities unless the underlying mandatory spending and revenue structure changes. The GTP budget & deficit archive and GDP dashboard tab track the underlying data series as they update.
All deficit-as-percentage-of-GDP figures are sourced from FRED series FYFSGDA188S (last updated 2026-03-13), which uses CBO/OMB annual fiscal year data through FY2025. Interest payment history from FRED series FYOINT (annual, fiscal year ending September 30; last updated 2025-10-16). Debt-to-GDP from FRED GFDEGDQ188S (last updated 2026-03-13). Weighted average interest rate data from U.S. Treasury Fiscal Data, pulled February 28, 2026. 10-Year Treasury yield from FRED GS10, February 2026. Revenue and outlay estimates are derived figures using GDP × historical revenue-to-GDP ratios; they are approximate and carry the caveats of estimation methodology.
Primary Sources
- FRED FYFSGDA188S — Federal Surplus/Deficit as % of GDP (Federal Reserve Bank of St. Louis; last updated 2026-03-13)
- FRED FYOINT — Interest Payments on Federal Debt (Federal Reserve Bank of St. Louis; last updated 2025-10-16)
- FRED GFDEGDQ188S — Federal Debt as % of GDP (Federal Reserve Bank of St. Louis; last updated 2026-03-13)
- U.S. Treasury — Average Interest Rates on Federal Debt (data as of February 28, 2026)
- FRED GS10 — 10-Year Treasury Constant Maturity Rate (Federal Reserve Bank of St. Louis; February 2026 = 4.13%)
- FRED GDP — Gross Domestic Product (Q4 2024 nominal GDP = $29,825B SAAR; used for revenue estimation; last updated 2026-03-13)