US National Debt: Approaching Record Levels & Risk of a Debt Spiral by 2036
- National debt is rapidly approaching a critical juncture, with projections indicating it could surpass historical highs by 2030 and reach 120% of Gross Domestic Product by 2036.
- Currently standing at approximately $31 trillion, or 100% of GDP, the national debt is poised to exceed the previous record of 106% set after World War II within...
- A key factor driving these escalating costs is the yield on Treasury bonds, which has been climbing after years of historically low rates.
The U.S. National debt is rapidly approaching a critical juncture, with projections indicating it could surpass historical highs by and reach 120% of Gross Domestic Product by . More immediately concerning, however, is the growing risk of a “debt spiral” – a scenario where rising interest rates on government borrowing outpace economic growth, potentially triggering a fiscal crisis.
Currently standing at approximately $31 trillion, or 100% of GDP, the national debt is poised to exceed the previous record of 106% set after World War II within the next few years, according to the Congressional Budget Office (CBO). The CBO forecasts that annual debt interest costs will more than double, reaching $2.1 trillion by , consuming a larger portion of federal spending and exacerbating budget deficits.
A key factor driving these escalating costs is the yield on Treasury bonds, which has been climbing after years of historically low rates. This increase is attributed to prior Federal Reserve rate hikes, the unsustainable trajectory of U.S. Borrowing and concerns regarding the reliability of the U.S. In global finance. The average interest rate paid by the Treasury Department currently stands at 3.316%, but the CBO projects this will rise to 3.4% this year and continue increasing, ultimately reaching 3.9% in the coming decade.
The Committee for a Responsible Federal Budget (CRFB) warns that the rising average interest rate will account for roughly half of the increase in interest costs over the next ten years. “CBO’s latest baseline shows an unsustainable fiscal outlook, with debt approaching record levels, deficits remaining elevated at more than twice a reasonable target, and interest costs exploding,” the CRFB noted in a recent analysis. The organization specifically highlighted the danger of interest rates exceeding nominal economic growth, a condition that could initiate a debt spiral.
The prospect of a debt spiral is particularly alarming because it undermines the common political strategy of relying on robust economic growth to manage the national debt. If interest costs grow faster than the economy, it could force more drastic measures to avert a crisis. The CBO’s current economic forecast is relatively conservative, projecting nominal GDP growth to slow from 4.1% in to 3.9% in and 3.8% in .
Adding to the uncertainty is a pending Supreme Court decision regarding the legality of tariffs imposed during the Trump administration. While these tariffs have provided a revenue boost, mitigating deficits to some extent, their legal standing is precarious. If the Supreme Court rules against the administration, tariff revenue would fall sharply, and the Treasury could face claims for reimbursement, necessitating further borrowing and potentially disrupting the bond market.
The CRFB estimates that an unfavorable Supreme Court ruling, combined with the extension of expiring tax provisions, could increase deficits to $3.8 trillion by and push the national debt to 131% of GDP, significantly increasing the likelihood of a debt spiral and a fiscal crisis. The administration has indicated it may seek alternative legal avenues to maintain tariffs, but this process could take months and potentially offer a less durable solution.
Despite these concerns, there is some potential for positive economic developments to improve the outlook. The CBO acknowledges that the widespread adoption of generative AI could modestly boost total factor productivity growth, potentially adding 0.1 percentage point annually and increasing output by 1 percentage point by . However, this projection remains relatively modest, and the actual impact of AI on economic growth remains uncertain.
Beyond the headline figures, several major trust funds are facing insolvency. The Highway Trust Fund is projected to deplete its reserves by , the Social Security retirement trust fund by , and the Medicare Hospital Insurance trust fund around . These looming shortfalls add further pressure to the federal budget and underscore the need for long-term fiscal solutions.
The CBO’s latest projections represent a significant increase in projected borrowing compared to previous estimates. Between and , the CBO now forecasts $1.4 trillion more in borrowing than it did last January, with $2 trillion of that increase attributable to policy changes. The reconciliation law alone is expected to add $4.7 trillion to the debt, while tariffs are projected to subtract $3 trillion.
The confluence of rising debt, increasing interest rates, and potential legal challenges to existing revenue streams paints a concerning picture for the U.S. Fiscal outlook. While economic growth and technological advancements offer potential mitigating factors, the risk of a debt spiral remains a significant threat that policymakers must address to ensure long-term economic stability.