CBO Projects Alarming US Debt Trajectory

The latest report from the nonpartisan Congressional Budget Office (CBO) underscores growing concerns about the sustainability of the US debt trajectory as federal deficits expand and long-term projections deteriorate. According to the CBO's February 2026 budget and economic outlook, US debt held by the public will rise from approximately 101 percent of GDP in 2026 to around 120 percent of GDP by 2036.

This projected ratio would exceed previous historical peaks, including the post-World War II period, marking an unprecedented level of US debt relative to economic output. The report highlights a structural imbalance in federal revenues and expenditures, suggesting that deficits will remain a defining feature of the United States' fiscal landscape in coming years. The evolving situation has caught the attention of markets and policymakers alike, prompting renewed debate about fiscal policy and economic strategy.

Fiscal 2026 Deficit Remains Elevated

The federal budget deficit for fiscal year 2026 is expected to reach about US$1.853 trillion, equivalent to roughly 5.8 percent of GDP. This represents a modest increase from the 2025 deficit of US$1.775 trillion and reflects persistent shortfalls between government receipts and outlays that continue to drive US debt accumulation.

Over the next decade, the average deficit-to-GDP ratio is forecasted to be about 6.1 percent, rising to nearly 6.7 percent by 2036. According to Reuters and other financial news sources, these numbers weigh heavily on the broader understanding of US debt dynamics. Elevated deficits dilute fiscal buffers and make it more challenging to respond to unexpected economic shocks.

Historically, sustained deficits have contributed to rising public debt levels, and current projections indicate that this trend is likely to continue.

Key Drivers Behind Rising US Debt

Several factors contribute to the projected increase in US debt. Chief among them are recent policy changes, including large tax cuts and spending provisions that have expanded the federal fiscal footprint. The primary drivers include:

• The "One Big Beautiful Bill Act" extending tax provisions and expanding deductions
• Lower immigration levels reducing the available tax base
• Slower projected economic growth constraining revenue generation
• Rising mandatory spending on entitlement programs

The legislation known as the "One Big Beautiful Bill Act" is estimated to add roughly US$4.7 trillion to cumulative deficits over the next decade, significantly impacting the US debt outlook. Lower immigration levels are also expected to reduce the available tax base, contributing an estimated US$500 billion to additional deficits.

While some revenue from higher tariffs is projected to partially offset the widening deficit, the net impact remains strongly expansionary. Tariff revenues are expected to reduce deficits by about US$3 trillion over the same period, but that benefit does not fully counterbalance the fiscal effects of tax cuts and spending decisions that continue to push US debt higher.

Economic Growth Projections Fall Short

Another factor influencing the US debt outlook is slower projected economic growth. The CBO's baseline assumes real GDP growth of about 2.2 percent in 2026, declining to an average of around 1.8 percent for the remainder of the decade. This outlook is more conservative than the Trump administration's optimistic projections, which suggest significantly higher growth driven by business investment and technology deployment.

Market Implications of Expanding US Debt

The rising trend in US debt and deficits has material implications for financial markets. Escalating public debt levels can influence Treasury yields, bond demand, and investor appetite for risk. As deficits grow, market participants may demand higher yields to compensate for perceived risk, potentially raising borrowing costs for both the government and private sector.

Key market considerations include:

1. Potential upward pressure on Treasury yields as US debt issuance increases
2. Foreign investor demand for US bonds amid fiscal concerns
3. Impact on dollar strength and global reserve currency status
4. Crowding out of private sector borrowing due to government demands

Conversely, if demand remains strong due to safe-haven dynamics, yields could stay lower despite fiscal strain. According to financial analysts, investors are closely watching how these figures may interact with broader macroeconomic indicators such as interest rates, inflation, and economic growth.

Debt Service Costs Escalate Rapidly

As the US debt continues to grow, interest payments on the national debt are also projected to rise sharply. Debt servicing costs now represent a significant portion of federal outlays and are expected to climb faster than many other budget categories. Analysts warn that a larger share of government revenue will be devoted to interest expenses, crowding out funding for other priorities such as infrastructure, education, and social programmes.

This dynamic can influence monetary policy in complex ways. With rising yields and increased debt service burdens associated with higher US debt levels, the Federal Reserve may face conflicting signals when setting interest rate policy. Higher rates could stabilize inflation but will exacerbate debt servicing costs, while lower rates might ease fiscal pressure but risk fueling inflation.

Policy Challenges and Future Outlook

Policymakers are beginning to grapple with the realities of unsustainable US debt growth. Some economic analysts argue that the current fiscal path could constrain future policy options and limit the government's ability to respond to recessions or financial crises. They emphasize the need for a balanced approach to revenue and expenditure — potentially including adjustments to tax policy and entitlement reform — to stabilize the US debt outlook.

However, political divisions complicate consensus on such measures. The CBO's latest projections serve as a stark reminder of the long-term challenges facing the US fiscal setup. Whether through legislative action or shifts in economic growth, managing the trajectory of US debt will remain a core focus for analysts, investors, and policymakers in the years ahead.

The projected rise in US debt to 120 percent of GDP represents not just a fiscal challenge, but a fundamental question about the long-term sustainability of current policy approaches.