U.S. national debt tops $40 trillion, hitting a record high

The U.S. Department of the Treasury announced on August 20 that the nation’s total debt had surpassed the $40 trillion mark for the first time, with the day's figures showing a balance of $40.047 trillion – the highest level ever recorded. The figure comes from the Treasury’s daily “Public Debt Balance” report, which was posted on the agency’s website for public access.

The Treasury, one of the fifteen executive departments of the federal government, is the central authority responsible for fiscal revenue, expenditure, and debt management. Its core duties include collecting federal taxes through the Internal Revenue Service, issuing and redeeming U.S. Treasury securities, supervising banks and savings institutions, and advising Congress and the President on fiscal policy. The department’s Bureau of Engraving and Printing and the United States Mint handle the production of paper currency and coins, respectively; every circulating U.S. dollar bears the signatures of the Treasury Secretary and the Treasurer of the United States.

The Treasury traces its origins to the Treasury Act of 1789, passed by Congress to coordinate the new nation’s revenues and expenditures. Its first Secretary was Founding Father Alexander Hamilton, who advocated financing national construction and military spending through the issuance of public debt, laying the groundwork for modern sovereign borrowing. Since then, the department’s responsibilities have expanded from early tax collection and debt issuance to today’s comprehensive role encompassing monetary supply, financial regulation, and international fiscal cooperation.

The continued growth of the national debt has sparked vigorous debate in American politics. Democrats and Republicans disagree over budget deficits, tax reform, and the prioritization of government spending. Some legislators warn that high debt levels could push up interest rates, weaken confidence in the dollar, and threaten global financial stability, while others argue that, amid the current economic recovery and infrastructure needs, moderate borrowing can help stimulate growth. The Federal Reserve must simultaneously balance inflation control with market liquidity, making debt management a central issue of macro‑policy deliberations.

For Taiwan, changes in the scale of U.S. Treasury securities directly affect global financing costs and the U.S. dollar’s exchange rate. As the dollar remains the primary currency for international trade and investment, any interest‑rate increase linked to a larger U.S. debt could raise the dollar‑denominated financing costs for Taiwanese firms and affect the price competitiveness of their exports. Moreover, Taiwan holds a substantial portion of U.S. Treasury securities as foreign‑exchange reserves; fluctuations in debt size and credit ratings also impact the safety and liquidity of those reserve assets. From a policy perspective, the United States’ experience in fiscal and debt management offers Taiwan a reference point for balancing budget discipline, public investment, and financial stability, underscoring the need for careful planning when expanding infrastructure while maintaining fiscal soundness.