U.S. National Debt Surpasses $40 Trillion Milestone

The United States Department of the Treasury reported that the national debt surpassed $40 trillion on August 18, 2026, reaching $40.05 trillion. The debt has more than doubled since 2017, adding $1 trillion in the last five months alone. Annual interest payments now exceed $1 trillion, making debt servicing the government's second-largest expense, trailing only Social Security and surpassing spending on national defense and Medicare.

Contributing factors include an aging population increasing Social Security and Medicare costs, tax cuts, and rising defense expenditures linked to President Donald Trump's war in Iran. The Congressional Budget Office estimates that the administration's One Big Beautiful Bill will add $4.2 trillion to the debt through fiscal year 2034. To manage rising borrowing costs and a potential bond sell-off, Treasury Secretary Scott Bessent announced the government will at least double its purchases of long-term government debt this fall and shift toward short-term borrowing.

Fiscal experts warn the trajectory is unsustainable. Michael Peterson of the Peter G. Peterson Foundation noted that high federal borrowing increases consumer interest rates for mortgages, which have climbed to nearly 6.7%, as well as auto loans and credit cards. While the debt limit was raised to approximately $41 trillion last year, the Bipartisan Policy Center estimates the U.S. will hit that ceiling between late winter and mid-summer of 2027. Treasury Secretary Bessent suggested the U.S. must grow its way out of the deficit through economic growth and tariffs.