U.S. National Debt vs. GDP Growth: Assessing Debt Sustainability

Companion Excel Workbook: Federal Debt in Context

Gross U.S. federal debt reached $39.5 trillion in mid-2026[1], having closed fiscal 2025 at $37.6 trillion, or 122% of GDP.

Federal Debt vs. Nominal GDP

U.S. federal debt and nominal GDP in trillions, 1960 to 2025: two lines converging through the 2000s, with debt first crossing above GDP in FY2014 and the gap widening to $37.6 trillion of debt against $30.8 trillion of GDP by 2025

Gross federal debt at fiscal year-end (September 30) against calendar-year nominal GDP. The shaded area marks the years debt exceeded GDP. Sources: U.S. Treasury (FRED GFDEBTN), BEA (FRED GDPA) | Chart: CRE42.com

Debt first exceeded nominal GDP in FY2014, at 101% of GDP. It slipped back below in FY2015 and has been above every year since FY2016. The pandemic pushed the ratio to 126% in FY2020, its highest reading in the series and above the previous post-war record; it then fell back as nominal GDP rebounded faster than borrowing, and has been drifting up again since FY2023[2].

Key Observations

Gross federal debt closed FY2025 at $37.6 trillion, 122% of GDP. The 60% threshold prompted bipartisan alarm in the 1990s; the 100% level that Reinhart and Rogoff identified as a sovereign risk marker was crossed in FY2014.

In FY2025 debt grew 6.1% while nominal GDP grew 5.0%, a gap of 1.1 percentage points. Debt has outgrown nominal GDP in seven of the past ten fiscal years, which is why the ratio keeps climbing.

The FY2025 deficit was $1.78 trillion at full employment[3]. CBO projects deficits rising to $3.1 trillion by 2036 and cumulative deficits of $23.1 trillion over 2026 to 2035, so the numerator is set to keep compounding regardless of which party holds the budget.

Net interest reached $970 billion in FY2025 and exceeded national defense outlays of $917 billion; gross interest costs, which include interest credited to federal trust funds, were roughly $1.2 trillion[4].

Annual Growth: Debt vs. Nominal GDP vs. Real GDP

Grouped bars of year-over-year growth in gross federal debt, nominal GDP and real GDP for FY2001 through FY2025, showing debt growth above nominal GDP growth in most years and far above real GDP growth

Debt is a nominal obligation, so the standard sustainability test compares debt growth to nominal GDP growth; the real-GDP bar is shown for context and the difference between the two is inflation. Sources: U.S. Treasury, BEA | Chart: CRE42.com

The US deficit (annual federal debt growth) is typically quoted in nominal terms, whereas GDP growth is traditionally measured in real (i.e., adjusted for inflation).

The chart above illustrates the persistently wide difference between the annual debt and real GDP but a much narrower gap when measured against nominal GDP growth, the more accurate and relevant comparison.

▶ Chart Details: debt, GDP and the ratio at five-year intervals

Fiscal year	Gross federal debt ($B)	Nominal GDP ($B)	Debt / GDP	Debt YoY	Nominal GDP YoY
1960	286	542	52.8%	—	—
1970	371	1,073	34.6%	+16.9%	+44.6%
1980	908	2,857	31.8%	+70.2%	+69.6%
1990	3,233	5,963	54.2%	+77.4%	+37.4%
2000	5,674	10,251	55.4%	+14.1%	+34.2%
2010	13,562	15,049	90.1%	+13.9%	+3.9%
2020	26,945	21,375	126.1%	+18.6%	−0.8%
2025	37,638	30,762	122.4%	+6.1%	+5.0%

Debt at fiscal year-end against calendar-year nominal GDP. Growth columns are versus the prior row for the five-year and ten-year steps, and versus the prior year for 2025, so they are not comparable across rows. Source: Historical Data tab, companion workbook.

Gross Federal Debt as a Share of GDP

Gross federal debt as a percent of GDP, 1960 to 2025: falling from 53 percent in 1960 to 32 percent in 1980, rising through the 1980s and 1990s to 65 percent, dipping to 55 percent in 2000, then climbing to a pandemic peak of 126 percent and settling at 122 percent

Gross federal debt at fiscal year-end divided by calendar-year nominal GDP, the convention OMB and CBO use. Sources: U.S. Treasury (FRED GFDEBTN), BEA (FRED GDPA) | Chart: CRE42.com

The ratio fell for two decades after 1960, from 53% to 32% by 1975, as post-war debt was inflated and grown away rather than repaid. It sat near 32% at the end of the 1970s.

The Reagan-era defense buildup and the tax reductions of the period took the ratio from 32% in 1980 to 54% by 1990, and past 60% in the early 1990s to 65% by 1995. That level drove genuine bipartisan deficit reduction, which combined with dot-com era capital gains receipts to produce four budget surpluses and pull the ratio back to 55% by 2000.

Every subsequent move has been upward: the global financial crisis and its recovery spending took the ratio from 62% in 2007 to 99% in 2013, and the pandemic took it from 105% in FY2019 to 126% in FY2020.

The FY2020 peak reads 126%, not the 132% figure that circulated earlier. The higher number used the December 31, 2020 calendar year-end debt balance against fiscal 2020 GDP; the workbook now uses the September 30 fiscal year-end throughout[2].

US Federal Debt: Historical Context

In their 2009 study This Time Is Different, Carmen Reinhart and Kenneth Rogoff examined eight centuries of sovereign debt crises. Their most relevant finding here: 84% of middle-income sovereign defaults between 1970 and 2008 occurred at debt-to-GNP ratios below 100%. The U.S. now sits at 122%.

However, the US is a high-income country, it issues debt in its own currency, and the dollar remains the world’s reserve currency. No defaulting sovereign in that dataset enjoyed any of the three. Outright default on Treasury securities is close to unimaginable for a government that can create the currency in which its obligations are denominated. The alternative adjustment mechanism, however, is inflation, and that is the channel through which federal debt reaches commercial real estate.

Commercial Real Estate Impact

Persistent deficits increase Treasury issuance, which exerts upward pressure on bond yields and, through them, on borrowing costs and capitalization rates. The 10-year Treasury yield has not fallen in step with the Federal Reserve’s short-rate reductions, which is consistent with a market pricing supply and inflation risk into the long end rather than pricing policy.

Treasury yields anchor mortgage rates and cap rates. The relationship, and the periods when it has broken down, is examined on the Cap Rates vs. the 10-Year UST page.

Debt-driven inflation raises construction costs and replacement cost, which supports existing asset values while making new development harder to underwrite.

Real assets with the ability to reprice rents at short intervals carry the inflation exposure better than long-duration leases with fixed escalators, so lease structure becomes a rate-regime decision rather than an administrative one.

The optimistic case is that AI-driven productivity gains raise the growth ceiling and prove disinflationary, closing the gap from both sides. See AI and Knowledge Work.

What to Watch For in 2026 and Beyond

Sources to Track Federal Debt and GDP:

Source	Report or Series	Frequency	Notes
U.S. Treasury via FRED	GFDEBTN, total public debt	Quarterly	The debt series behind every chart on this page
U.S. Treasury	Monthly Statement of the Public Debt	Monthly	Current-period detail and the public vs. intragovernmental split
BEA via FRED	GDPA, nominal GDP; Table 1.1.1 for real growth	Quarterly, with annual revisions	The denominator; annual revisions restate prior years
CBO	The Budget and Economic Outlook	Annual, usually January or February	The ten-year deficit and debt projections cited above
OMB	Historical Table 7.1	Annual, with the Budget	Gross debt on the budget basis, and the public vs. trust fund split

Footnotes

[1] Gross federal debt of $39,462.4 billion at June 30, 2026 comprises $31,681.3 billion held by the public and $7,781.1 billion of intragovernmental holdings, the nonmarketable securities Treasury owes federal trust funds. Gross debt is the focal measure across this section; debt held by the public is the secondary measure and drives the debt-service arithmetic, since net interest is paid only on the public share. Source: U.S. Treasury, Monthly Statement of the Public Debt, June 30, 2026, Tables I and III. ↩

[2] All ratios on this page divide gross federal debt at fiscal year-end (September 30) by calendar-year nominal GDP, the convention OMB and CBO use in official publications. FY2025: $37,637.6 billion over $30,762.1 billion, or 122.4%. The FY2020 figure was corrected in the July 2026 workbook refresh to the September 30, 2020 balance of $26,945.4 billion; the earlier compilation had used the December 31, 2020 calendar year-end and produced a peak of roughly 132%. Sources: U.S. Treasury via FRED (GFDEBTN, June 18, 2026 update), BEA via FRED (GDPA, April 9, 2026 vintage). ↩

[3] FY2025 deficit of $1,775.4 billion per the Treasury final Monthly Treasury Statement (receipts $5,234.6 billion less outlays $7,010.0 billion). The OMB Historical Tables basis prints $1,774.7 billion for the same year; the difference is timing and coverage. CBO projections are from The Budget and Economic Outlook: 2026 to 2036 (February 2026): deficits of $1.9 trillion in 2026 (5.8% of GDP) rising to $3.1 trillion in 2036 (6.7%), cumulative deficits of $23.1 trillion over 2026 to 2035, and debt held by the public reaching 120% of GDP in 2036, surpassing its 1946 record of 106%. Note that CBO’s 120% is debt held by the public, not the gross measure used elsewhere on this page; debt held by the public equaled 98% of GDP at fiscal year-end 2025. ↩

[4] FY2025 net interest of $970.4 billion exceeded national defense outlays of $916.6 billion, both net outlays by budget function on the same basis (U.S. Treasury, final Monthly Treasury Statement FY2025, Table 9). Gross interest costs of approximately $1.2 trillion include interest credited to federal trust funds, an internal transfer that nets out of the deficit (U.S. GAO, Financial Audit: Bureau of the Fiscal Service’s FY2025 and FY2024 Schedules of Federal Debt, GAO-26-107908). The effective rate on the debt, at 3.3% in FY2025 against a 1.6% trough in FY2021, is analyzed on the Federal Deficit and Interest Rate Growth page. ↩

Sources

1. U.S. Treasury Department. Monthly Statement of the Public Debt, June 30, 2026. fiscaldata.treasury.gov

2. U.S. Treasury Department. Total Public Debt, FRED Series GFDEBTN. fred.stlouisfed.org/series/GFDEBTN

3. Bureau of Economic Analysis. Gross Domestic Product, FRED Series GDPA (April 2026 vintage). fred.stlouisfed.org/series/GDPA

4. Bureau of Economic Analysis. Table 1.1.1, Percent Change From Preceding Period in Real Gross Domestic Product (March 2026 vintage). bea.gov/data/gdp

5. U.S. Treasury Department. Final Monthly Treasury Statement, FY2025, Table 9. fiscaldata.treasury.gov

6. Congressional Budget Office. The Budget and Economic Outlook: 2026 to 2036, February 2026. cbo.gov/publication/61882

7. Office of Management and Budget. Historical Tables, FY2027 Budget, Table 7.1. whitehouse.gov/omb/budget/historical-tables

8. U.S. Government Accountability Office. Financial Audit: Bureau of the Fiscal Service’s FY2025 and FY2024 Schedules of Federal Debt, GAO-26-107908. gao.gov/products/gao-26-107908

9. Carmen M. Reinhart and Kenneth S. Rogoff. This Time Is Different: Eight Centuries of Financial Folly. Princeton University Press, 2009.

10. Olivier Blanchard. “Public Debt and Low Interest Rates.” AEA Presidential Address, American Economic Review, 2019.

11. CRE42.com Federal Debt Data Model. inflation-debt-in-context.xlsx, Historical Data and Growth Comparison tabs.

Methodology & Data Notes

Companion Workbook

inflation-debt-in-context.xlsx: companion workbook for the Federal Debt Sustainability section. This page draws on the Historical Data tab (debt, nominal GDP, the ratio and annual growth, 1960 to 2025) and the Growth Comparison tab (the three-way annual growth comparison, 2001 to 2025). Both tabs carry native embedded Excel charts.

Debt-to-GDP Calculation

Fiscal year-end debt (September 30) divided by calendar-year GDP. The three-month timing mismatch follows the convention OMB and CBO use in official publications. The 1960 to 1975 observations are June 30 fiscal year-ends, which is when the federal fiscal year ended before 1977.

Nominal vs. Real GDP

Debt is denominated in nominal dollars, so the standard sustainability comparison operates in nominal terms, the “r versus g” framework set out by Blanchard (2019). Comparing debt growth to real GDP growth implicitly ignores that inflation erodes the real burden of debt already outstanding. Both comparisons are carried in the workbook, with the nominal comparison labeled as the standard framework and the real comparison provided for context.

Which Debt Figure Applies Where

Three gross-debt bases run through this section by design and are reconciled on the Debt Comparisons tab: the Treasury MSPD current-period measure ($39,462.4 billion at June 30, 2026), the FRED GFDEBTN fiscal year-end series that drives this page’s ratios ($37,637.6 billion at September 30, 2025), and the OMB budget basis behind the receipts and outlays analysis ($37,375.0 billion, FY2025). No figure should be carried from one tab to another without restating its date and basis.

Reinhart & Rogoff Threshold

The 100% threshold referenced above comes from Reinhart and Rogoff (2009), whose finding was that 84% of middle-income sovereign defaults occurred below that level. Their separate 2010 paper, “Growth in a Time of Debt,” argued that GDP growth slows above 90% debt-to-GDP; that specific result was contested after Herndon, Ash and Pollin (2013) identified a spreadsheet error. The broader qualitative finding, that very high debt levels are associated with elevated sovereign risk, remains widely accepted, and it is the 2009 default finding rather than the 2010 growth finding that is cited here.

Retired Content

The debasement trade section (gold, silver and bitcoin indexed performance, compiled February 2026) was removed from this page on July 30, 2026, along with the corresponding workbook tab. The material addressed asset-price behavior rather than debt sustainability and sat outside the scope of this section.