The U.S. National debt exceeded $39 trillion on March 17, according to Treasury Department data, marking a rapid acceleration in borrowing. The debt surpassed the milestone at $39,016,762,910,245.14, just 150 days after crossing the $38 trillion threshold in late October 2025.
This pace of accumulation is drawing concern from financial analysts. The Peter G. Peterson Foundation noted the “unsustainable” rate of growth, highlighting that the debt has nearly doubled since January 2017, when it stood at $19.9 trillion.
The Congressional Budget Office (CBO) had previously projected the debt would not reach $37 trillion until 2030. The recent surge demonstrates a significant deviation from those earlier estimates. Between January 2024 and January 2025, the debt climbed from $34 trillion to $35 trillion. The subsequent increase to $36 trillion took 188 days, while reaching $37 trillion required another 265 days. However, the passage of the “Massive Beautiful Bill” in July 2025, which raised the debt ceiling by $5 trillion, unleashed a new wave of borrowing. Within two months of the bill’s enactment, the debt exceeded $37 trillion, and within another two months, it surpassed $38 trillion.
The sheer scale of the debt is demanding to contextualize. To eliminate the debt, every U.S. Citizen would need to contribute $113,615, or $357,068 per taxpayer, according to calculations based on the current population and tax base. The $39 trillion figure also exceeds the combined annual gross domestic product of China, Germany, India, Japan, and the United Kingdom.
Rising interest payments are becoming a dominant factor in federal spending. In February 2026, the Treasury Department allocated $93.48 billion to interest on the debt, bringing the total for the first five months of fiscal year 2026 to $520 billion. This represents an 8.8 percent increase compared to the same period in fiscal year 2025. Total interest expense for fiscal year 2025 reached $1.2 trillion, a 7.3 percent increase from the previous year. Net interest payments—interest expense minus interest receipts—totaled $79 billion in February.
Currently, the federal government spends more on interest payments than on national defense ($412 billion) or Medicare ($478 billion). Only Social Security, at $678 billion, receives more funding. The increasing cost of servicing the debt is driven by both the growing debt itself and rising Treasury yields, even as the Federal Reserve considers potential rate cuts. As older, low-interest debt matures, it is being replaced with new debt carrying significantly higher interest rates.
Michael A. Peterson, CEO of the Peter G. Peterson Foundation, stated that the current rate of borrowing is “the definition of unsustainable.” The CBO is currently preparing long-term budget outlook data, but those projections do not account for the budgetary or economic effects of the Supreme Court’s February 20, 2026, ruling on tariffs.
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