Did the Public Debt Really Reach $40 Trillion? Should We Worry?

The US fiscal outlook is deteriorating, but the economically relevant public debt is $32.266 trillion rather than the widely cited $40 trillion, and persistent deficits should push interest rates and debt-service costs higher.

• Treasury’s “Public Debt Outstanding” reached $40.047 trillion on August 18, 2026, according to data released on August 19.
• That headline total combines debt held by the public with intragovernmental holdings, including Treasury securities owned by federal pension plans and the Social Security Trust Fund.
• Debt held by the public, viewed as the government’s genuine liability, stood at $32.266 trillion on August 18 and was up more than 8% year over year in August.
• Treasury debt held by the Federal Reserve is included in debt held by the public, while the Fed’s interest-paying reserves and currency are excluded.
• The author expects public debt to keep rising relative to GDP and federal revenues because of chronically high deficits, increasing government interest payments as Treasury yields rise.

Takeaway: The $40 trillion headline overstates the relevant borrowing burden, but the underlying fiscal problem remains serious; persistent deficits could require higher average policy rates, raise real yields and increase debt-service pressure, although the conclusion reflects the author’s forecasts and assumptions.