U.S. debt surpasses 39 trillion for the first time exceeding GDP: In 2026, the "gray rhino" that every investor must face

Key Data: Total national debt approximately $39 trillion · Debt-to-GDP ratio 100.2%, the first time since World War II · FY 2026 interest expenditure $1.039 trillion · Annual deficit approximately $2 trillion · Congressional Budget Office predicts debt will reach 175% of GDP by 2056 · Debt increases by $5 to $8 billion daily

Section One --- A Historical Milestone No One Celebrates

In March 2026, the United States crossed a threshold that had never been breached during peacetime since the end of World War II. The government's debt to external creditors—referred to as "publicly held debt," excluding debts to internal trust funds like Social Security—reached $31.27 trillion. Meanwhile, the nominal GDP of the United States over the past twelve months was $31.22 trillion. The debt-to-GDP ratio officially surpassed 100%.

Maya MacGuineas, president of the Committee for a Responsible Federal Budget, stated bluntly: "It has happened—U.S. national debt now exceeds the size of the U.S. economy, about twice the historical average."

According to data from the U.S. Treasury, as of May 18, 2026, the total national debt of the United States was precisely $39,008,999,901,378.68. This figure increases by approximately $5 billion to $8 billion daily, with an average daily growth rate of about $7.5 billion over the past twelve months. The debt surpassed $1 trillion in 1981, $10 trillion in 2008, and $20 trillion in 2017, nearly doubling in the past eight years.

Phillip Swagel, director of the Congressional Budget Office, issued a stark warning in February 2026: "Our budget forecasts consistently indicate that the current fiscal trajectory is unsustainable." Under the current legal framework, federal debt is projected to exceed the historical peak of 106% of GDP set in 1946 before 2030—rising to 120% of GDP by 2036 and a staggering 175% by 2056. Unlike the post-World War II era, when strong growth and fiscal discipline gradually reduced debt, the current debt level shows no signs of natural contraction.

Educational Note: National debt is typically discussed in two terms. "Total government debt" encompasses all obligations of the federal government, including debts to internal trust funds like Social Security. "Publicly held debt" refers to the government's obligations to external creditors, such as investors, foreign governments, and financial institutions that purchase U.S. Treasury securities. The latter is more meaningful economically, as it represents actual external borrowing. Both measures are currently at historic highs for peacetime.

Section Two --- Why Debt Is Hard to Reverse

The U.S. debt problem did not emerge suddenly but is the result of decades of structural choices—a cycle of tax cuts without corresponding spending reductions, increasing expenditures without matching revenue sources, compounded by the effects of interest on interest. Understanding this history helps explain why resolving this issue is so difficult.

The structural gap between government spending and revenue. Since 1970, the U.S. federal government has achieved a budget surplus in only four years, with deficits in all other years. Whenever government spending exceeds tax revenue, the shortfall is covered by issuing Treasury bonds. These bonds accumulate into debt, and the interest expenses generated by annual deficits further exacerbate the deficit. This creates a compounding spiral.

Three major categories driving spending growth. The federal budget has three dominant and continuously expanding spending centers. Social Security expenditures reached $953 billion in the first seven months of FY 2026; Medicare expenditures during the same period totaled $588 billion; and net interest expenditures on public debt reached $628 billion in those seven months, exceeding the combined total of Medicare and Medicaid. These three categories of spending have structural characteristics driven by demographic aging trends, healthcare costs, and debt accumulation, rather than annual political decisions. Cutting any one of them requires politically painful choices that successive administrations have long avoided.

The interest trap. This is the most concerning dynamic in the entire debt predicament. In 2015, the U.S. paid $223 billion in net interest on its debt; by 2020, this rose to $345 billion; by 2024, it is projected to reach $881 billion; and in FY 2026, it is expected to pay $1.039 trillion—almost tripling in just six years. Interest expenditures have become the third-largest item in the federal budget, surpassed only by Social Security and Medicare, exceeding defense spending. The CBO predicts that by 2028, interest expenditures will exceed Medicare spending, and by 2048, it will become the largest single expenditure of the federal government—at which point the government's spending on repaying historical debt will exceed all future investments.

The CBO predicts that over the next 30 years, U.S. government interest expenditures alone will reach nearly $100 trillion. To put this in perspective, this figure exceeds the total spending of all major federal programs.

The "Big Beautiful Act"—the latest acceleration engine. The "Big Beautiful Act" (OBBB), signed into law in 2025, made the tax cuts from the Trump era permanent and expanded tax exemptions for tips and overtime pay. The Congressional Budget Office estimates that this act will increase the fiscal deficit by $2.8 trillion over the next decade. If all temporary provisions become permanent, the Committee for a Responsible Federal Budget estimates the cost will rise to $4 to $5 trillion. The cumulative deficit forecast for 2026 to 2035 has now been revised upward to $23.1 trillion, $1.4 trillion higher than the CBO's forecast a year ago.

Pandemic legacy. The two largest annual fiscal deficits in U.S. history occurred during the COVID-19 pandemic: $3.1 trillion in FY 2020 and nearly $2.8 trillion in FY 2021. These borrowings remain on the balance sheet and incur a sustained interest burden at rates far exceeding those during the near-zero interest rate environment at the time of issuance.

Educational Note: A fiscal deficit is the annual difference between government spending and tax revenue. National debt is the cumulative total of past deficits, plus all interest. To put it simply: if you spend $5,000 more than you earn each month and cover the difference with a credit card, your monthly deficit is $5,000. Your total debt is the credit card balance—monthly overspending accumulates, plus the continuously accruing interest. The U.S. government's situation is exactly the same, just with many more zeros behind the numbers.

Section Three --- Will America Really Go Bankrupt?

This is a question every retail investor will eventually ask, and it deserves a careful and honest answer, rather than a simple yes or no.

The short answer is: the U.S. will not go bankrupt like a business or a household. The U.S. government issues its own currency—the dollar, which theoretically can always create more dollars to repay its debt. Historically, no country that borrows in its own currency and controls its central bank has ever faced forced involuntary default. The only instance of default in U.S. history occurred in 1979, and it was merely a brief default due to a technical operational error.

But this does not mean there are no consequences. The ability to print money brings another risk: inflation. If the U.S. government massively increases the money supply to repay debt, the real purchasing power of every dollar in circulation will depreciate—essentially imposing a hidden tax on everyone holding dollars and dollar-denominated assets. This is why the question of "Will America go bankrupt?" is far less important than the question of "What consequences will the current trajectory bring?"

Insights from Reinhart and Rogoff. Carmen Reinhart and Kenneth Rogoff, in their landmark study "This Time Is Different: Eight Centuries of Financial Folly," found that debt crises often do not arrive gradually and predictably but rather erupt suddenly with a collapse of confidence. Countries that appear to be managing their debt calmly may suddenly find investors stop buying their bonds or demand significantly higher yields, making the debt unsustainable. The transition from sustainable to unsustainable can occur within months rather than years.

The Cato Institute's framework—gradual, then sudden. The Cato Institute uses Hemingway's famous metaphor about how bankruptcy happens: gradually, then suddenly. Rational market participants can see the unsustainability of the U.S. fiscal trajectory from a distance, and they continue to buy U.S. Treasury bonds—until one day they stop. This moment of abrupt change cannot be precisely predicted in advance, but the underlying conditions that contribute to it are continuously accumulating.

What a real fiscal crisis would look like. A U.S. fiscal crisis will not resemble a business filing for bankruptcy but is more likely to manifest as a sudden spike in long-term Treasury yields—investors demanding higher compensation to continue lending. This will simultaneously raise borrowing costs across the entire economy—mortgages, corporate bonds, consumer credit will all rise. Banks, pension funds, and insurance companies holding large amounts of Treasury bonds will face significant losses, potentially jeopardizing their own solvency. The U.S. House Budget Committee has explicitly stated that considering the dollar's status as the global reserve currency, such a crisis "will almost certainly produce irreversible international ripple effects."

The dollar's status as a reserve currency is both a buffer and a risk. Over half of global foreign exchange reserves are held in dollars, creating structural global demand for the dollar and dollar-denominated assets (including U.S. Treasuries). This reserve currency status is the core reason the U.S. can maintain fiscal deficits at lower interest rates than any other country—economists refer to this privilege as "exorbitant privilege." However, reserve currency status is not permanent; it relies on global confidence in U.S. economic strength and institutional robustness. If this confidence erodes—as the International Monetary Fund warns that the "safety premium" on Treasuries is disappearing—this buffer will narrow.

Educational Note: A reserve currency is a currency widely held by central banks and international institutions as a store of value and a medium for global trade settlement. The dollar accounts for about 58% of global foreign exchange reserves. This means that even if neither party in a trade is American, trade between countries often settles in dollars. This creates sustained global demand for the dollar, supporting the U.S. in financing at rates below normal market levels.

Section Four --- What This Means for Investors

The U.S. debt issue is not a distant theoretical risk; it is already affecting financial markets and investors' portfolios in tangible ways, and this impact is likely to deepen rather than diminish.

Direct correlation with rising yields. In the second quarter of 2026 alone, the U.S. Treasury needed to borrow $189 billion, exceeding expectations by $79 billion from a few months prior. The actual borrowing amount in the first quarter of 2026 was $577 billion, and the third quarter is expected to require $671 billion. Such a massive and continuously growing supply of Treasury bonds flooding the market can only attract enough buyers through higher yields. The 30-year U.S. Treasury yield has risen to 5.2%, the highest since 2007; the 10-year yield reached 4.687% on May 19. These are not coincidences but direct reflections of supply-demand imbalances in the bond market driven by government borrowing needs.

Crowding out of private investment. When the government borrows extensively, it competes with businesses and households for available capital. The expansion of government borrowing raises borrowing costs for everyone—mortgages, corporate bonds, auto loans, and credit card rates all rise. This suppresses private investment, slows economic growth, and squeezes consumer spending. Funds that could have been directed toward infrastructure, research, education, and defense are instead flowing to creditors in the form of repaying historical debt.

Self-reinforcing compounding dynamics. The most dangerous feature of the current trajectory is its self-reinforcing nature: the larger the debt, the higher the interest expenditures; the higher the interest, the larger the deficit; the larger the deficit, the more borrowing is needed; the more borrowing, the higher the yields; the higher the yields, the heavier the interest burden on new debt. This cycle can maintain surface stability for a considerable time—until a critical point is reached.

Moody's downgrade and its signaling significance. In May 2025, Moody's downgraded the U.S. sovereign credit rating from Aaa to Aa1, becoming the last of the three major rating agencies to complete the downgrade. Standard & Poor's downgraded in 2011, and Fitch downgraded in 2023. The actions of all three agencies over 14 years convey a consistent message: the current fiscal trajectory is inconsistent with the highest credit ratings, and the gap between government commitments and revenues is structural rather than cyclical.

Social Security solvency—deadline in 2032. The CBO predicts that the Social Security Old-Age and Survivors Insurance Trust Fund will be depleted by 2032, one year earlier than previously forecasted. If Congress does not take action by then, according to the latest estimates from the Committee for a Responsible Federal Budget based on CBO forecasts, benefits for all recipients will be automatically cut by about 28%. In the first seven months of FY 2026 alone, Social Security has already cost $953 billion. Any legislative fix will involve politically painful choices that have been deferred for decades.

Section Five --- If U.S. Debt Is About to Explode, Why Is No One "Defusing the Bomb"?

Solving the U.S. debt problem is not mathematically complex, but politically it is nearly impossible to achieve. The mathematical solution is some combination of increasing revenue and cutting spending; the political difficulty lies in the fact that either option requires elected officials to ask voters to accept higher taxes or lower benefits—neither of which will win votes.

The dilemma on the revenue side. Federal government tax revenues have long been below spending levels. To close the deficit gap through tax increases, it would require raising income tax rates, broadening the tax base, or creating new sources of revenue. The direction of the "Big Beautiful Act" is entirely the opposite, as it cuts taxes and expands exemptions.

The dilemma on the spending side. Meaningful deficit reduction must address the three major spending categories: Social Security, Medicare, and interest on debt. Interest expenditures cannot be directly cut, as they are legal obligations on existing debt. Cutting Social Security and Medicare is politically sensitive, directly affecting the largest and most actively voting demographic—retirees and those nearing retirement.

Growth theory. Some economists argue that strong economic growth is the most realistic path to reducing the debt-to-GDP ratio without explicit fiscal consolidation. If economic growth continues to outpace debt growth, the ratio will eventually stabilize. This was indeed the case in the decades following World War II. Opponents argue that the current debt trajectory is too steep, and the growth of interest costs is too rapid; growth alone is insufficient to solve the problem.

Consensus among fiscal oversight bodies. The Committee for a Responsible Federal Budget estimates that achieving debt stability requires cutting deficits by about $10 trillion. Currently, there is no prospect of bipartisan cooperation to achieve even close to this goal. CBO Director Swagel's summary judgment—that "the fiscal trajectory is unsustainable"—represents the consensus of nearly every nonpartisan fiscal institution in the country.

Educational Note: The "debt-to-GDP ratio" is a standard measure used by economists to assess a country's debt burden. It compares the total debt to the size of the economy rather than looking solely at absolute numbers, as sustainability hinges on whether the economy has sufficient capacity to repay the debt. The U.S. debt-to-GDP ratio surpassing 100% means that the debt level has exceeded the total annual output of the entire economy—this level has only occurred during World War II.

Section Six --- Impacts on Different Types of Investors

Equity investors: The debt crisis has given rise to a long-term interest rate environment above the near-zero rates of 2009 to 2022. This structurally suppresses high-valuation growth stocks that rely on low discount rates. Benefiting sectors include finance—wider spreads enhance the interest income of banks and insurance companies; as well as firms with robust current earnings and low debt ratios.

Bond investors: The U.S. debt trajectory poses mid-term headwinds for long-term Treasuries. Increased bond supply means prices are under pressure, and yields are rising over time. For investors seeking stable income, the current yield environment is the most attractive in nearly fifteen years—but the risk is that yields may continue to rise. Investment-grade corporate bonds and intermediate Treasuries currently offer a better risk-return balance than long-term Treasuries.

Gold and physical asset investors: Historically, persistent fiscal deficits and concerns about currency devaluation have always been major drivers of gold demand. The significant appreciation of gold over the past two years partly reflects market assessments of the U.S. fiscal trajectory. Physical assets—real estate, commodities, inflation-protected bonds—have historically provided some hedge against the erosion of purchasing power caused by fiscal excess.

Singapore and Asian investors: The U.S. debt crisis impacts Asia through multiple channels. Rising U.S. yields attract capital out of emerging markets, putting pressure on Asian currencies and stock markets. If investor confidence in U.S. fiscal management wanes, leading to a weaker dollar, the purchasing power of Asian investors holding dollar-denominated assets will be adversely affected. Singapore, as an international financial center, is particularly sensitive to any global capital market turmoil triggered by U.S. fiscal pressures.

All investors: The most important practical implication of the current debt situation is that the era of ultra-low interest rates that prevailed from 2009 to 2022 will not return. The structural forces maintaining a high-interest rate environment—requiring massive issuance of Treasury bonds to cover ongoing deficits—are not temporary. Portfolio strategies built on the assumption of permanently low rates need to be reassessed and adjusted.

Section Seven --- An Honest Assessment: Crisis, Slow Burn, or Controlled Decline

There may be three broad scenarios for the U.S. debt situation over the next decade.

Scenario One: Gradual Stability. Congress eventually implements meaningful fiscal reforms—achieving stability in the debt-to-GDP ratio through a combination of revenue increases and spending controls. There are precedents in other countries: both the UK and Canada underwent painful but successful fiscal consolidations in the 1990s. In this scenario, long-term yields will eventually stabilize or even decline, allowing financial markets to adjust without a crisis.

Scenario Two: Slow Burn. Debt continues to grow, interest rates remain high, and potential economic growth is persistently pressured by government borrowing crowding out private investment. Inflation hovers above the Federal Reserve's target. Improvements in living standards slow. The U.S. retains its reserve currency status, but the premium narrows. Most fiscal economists view this as the most likely baseline scenario—not a crisis, but a continuous drag on economic performance and asset returns. This scenario can be said to be already in progress.

Scenario Three: Sudden Collapse of Confidence. At some point, enough participants in the bond market simultaneously conclude that the "trajectory is unsustainable," demanding significantly higher yields or simply stopping purchases. This will trigger a sudden spike in borrowing costs, and the rise in borrowing costs will further expand the deficit through higher interest expenditures, further eroding confidence. Reinhart and Rogoff's research documents this pattern across 800 years of sovereign debt crises. The structural advantages the U.S. possesses—reserve currency status, economic size and diversity, deep capital markets—make this scenario less likely than in other countries. However, the Committee for a Responsible Federal Budget, CBO, IMF, and Moody's have all made it clear: if the current trajectory continues, some form of crisis will eventually arrive.

Investors' Honest Conclusion: The probability of an acute crisis erupting in the next one to two years is low but not negligible; the probability of a slow burn scenario over the next five to ten years is significantly higher. Corresponding portfolio implications—favoring current earnings over long-term growth, shortening fixed income duration, using physical assets to partially hedge inflation risk, and promoting geographic diversification to reduce concentration in purely dollar-denominated assets—are adjustments worth implementing now, without needing to hold a definitive judgment on when a more severe scenario may occur.

Section Eight --- Key Developments Worth Ongoing Attention

Updates from the Congressional Budget Office. The CBO releases budget and economic outlook reports multiple times each year, serving as the most reliable nonpartisan source of fiscal trajectory data. Any significant upward revision in deficit or debt forecasts is a data signal that warrants close attention.

Demand for Treasury auctions. The primary signal for assessing whether the bond market is calmly digesting U.S. Treasury supply or is under pressure is the strength of demand in Treasury auctions—measured by bid-to-cover ratios. Low bid-to-cover ratios indicate that the government is struggling to find enough buyers at current yields.

Social Security trust fund forecasts. The annual trustee reports released each year provide the latest predictions for the depletion timeline. Currently, the Old-Age and Survivors Insurance (OASI) fund is projected to be depleted by 2032. If this timeline is further accelerated, it would be a significant negative signal.

Trends in 30-year Treasury yields. Currently at 5.2%, the highest since 2007. If it remains above 5.5%, it indicates a significant upgrade in the market's assessment of U.S. fiscal risk.

Bipartisan fiscal cooperation actions—or the lack thereof. The $10 trillion deficit reduction target estimated by the Committee for a Responsible Federal Budget serves as a benchmark for measuring any legislative action. Bipartisan cooperation toward this goal would be a significant positive signal; the absence of such cooperation—currently the baseline state—will allow the slow burn scenario to progress steadily.

The debt stands at $39 trillion, increasing by $5 to $8 billion daily. This year, interest expenditures have surpassed $1 trillion for the first time. The debt-to-GDP ratio has exceeded 100% for the first time since World War II. The CBO states that the fiscal trajectory is unsustainable. The bond market sends the same signal through rising yields. For investors, the question is not whether this is important. The question is: in a world where U.S. government borrowing needs are long-lasting and continually growing, against the backdrop of the end of the era of cheap government debt, how to adjust one's portfolio layout.

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Data Sources

Hoover Institution, U.S. National Debt and Deficits, May 2026. Fox Business, FY 2026 federal deficit expected to reach $2 trillion, May 2026. Fox Business, U.S. national debt first surpasses $39 trillion historical milestone, March 2026. Congressional Budget Office, "Budget and Economic Outlook: 2026 to 2036," February 2026. Committee for a Responsible Federal Budget, CBO February 2026 Budget and Economic Outlook, February 2026. Committee for a Responsible Federal Budget, Publicly Held Debt Exceeds GDP, May 2026. BigGo Finance, U.S. debt exceeds overall economy for the first time since World War II, May 2026. Independent Institute, Another Grim Milestone for National Debt, May 2026. CBS News, U.S. debt now exceeds GDP, May 2026. Fortune Magazine, U.S. national debt officially surpasses $39 trillion, May 2026. Fortune Magazine, U.S. Treasury pays $3 billion in interest daily, May 2026. Fortune Magazine, $38 trillion national debt fiscal trajectory unsustainable CBO, February 2026. American Action Forum, National Debt Interest Expenditures: Recent and Long-Term Outlook, April 2026. Committee for a Responsible Federal Budget, Debt Interest Will Exceed $1 Trillion, February 2025. Peter G. Peterson Foundation, The Cost of National Debt, March 2026. Bipartisan Policy Center, CBO's Latest Ten-Year Baseline Fiscal Outlook, February 2026. Bipartisan Policy Center, Deficit Tracker, May 2026. 24/7 Wall St., Social Security OASI Fund Depletion Date 2032, March 2026. Fox Business, Social Security Trust Fund 2032 Payment Crisis, February 2026. U.S. Congress Joint Economic Committee, Monthly Debt Update, April 2026. Council on Foreign Relations, What Happens When the U.S. Hits the Debt Ceiling, 2023. Cato Institute, Bankruptcy: Gradual Then Sudden, 2023. U.S. House Budget Committee, The Consequences of Debt, 2025. Carmen Reinhart and Kenneth Rogoff, "This Time Is Different: Eight Centuries of Financial Folly."

Data as of May 2026.

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