US national debt rises $658B since July 1 amid spending criticism

The US national debt has ballooned by $658 billion since July 1, pushing the gross figure past the $40 trillion mark for the first time in history. The milestone, reached on August 18, puts a sharp number on a problem that Washington has discussed loudly and addressed quietly for years.

To put that in perspective, the government has been adding roughly $8 to $9 billion in debt every single day.

The numbers behind the borrowing binge

The gross national debt hit $40.05 trillion on August 18, up from approximately $39.4 trillion at the end of June. Debt held by the public, the portion that economists consider most relevant for measuring economic impact, stood at roughly $32.0 to $32.2 trillion during the same period.

The total federal deficit for fiscal year 2026 reached $1.8 trillion through July, a 4% increase compared to the same point last year.

Net interest payments climbed by $117 billion year-over-year, a 14% increase. Interest on the national debt is now competing with defense spending and Medicare for the title of largest federal expense.

The national debt has more than doubled compared to a decade ago.

What’s driving the deficit

The spending side of the ledger tells most of the story. Mandatory spending programs, primarily Social Security and Medicaid, account for the largest share of federal outlays. These are programs that run on autopilot based on eligibility rules, meaning Congress doesn’t vote on them annually.

The Congressional Budget Office and the Bipartisan Policy Center have both flagged the current path as unsustainable. Their projections show the debt continuing to climb in the years ahead, barring significant policy changes.

Treasury borrowing estimates reinforce the picture. The government remains heavily reliant on credit markets to fund ongoing operations, issuing new debt not just to cover fresh spending but to roll over maturing obligations from previous years.

Market implications and the alternative asset question

As Treasury issuance increases to fund the deficit, the supply of government bonds grows. More supply, all else equal, pushes yields higher, which means the government pays even more in interest.

Higher Treasury yields ripple through the entire financial system. They raise borrowing costs for corporations, homebuyers, and consumers. They also reshape the competitive landscape for investment returns, since a risk-free government bond paying a higher yield makes riskier assets less attractive on a relative basis.

The debt remains denominated in dollars, and the US retains the ability to print its own currency, so outright default remains a theoretical impossibility. But the real purchasing power of those returns is a different matter when deficits of this magnitude put downward pressure on the dollar over time.

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