US national debt set to exceed $40 trillion this week as tariff refunds accelerate fiscal timeline

The US national debt is about to cross $40 trillion for the first time. As of August 14, total gross debt stood at approximately $39.93 trillion. The gap between that number and the big round one everyone is watching? About $70 billion, which the federal government can burn through in a matter of days given its current borrowing pace.

How a court ruling fast-tracked the inevitable

The accelerated timeline traces back to February 2026, when the Supreme Court invalidated key tariffs that had been imposed under the International Emergency Economic Powers Act. The ruling didn’t just stop future tariff revenue from flowing in. It required the government to issue refunds on tariffs already collected.

Those refunds are estimated between $165 billion and $170 billion.

Treasury Secretary Scott Bessent has characterized the refund obligation as a one-time fiscal hit, describing the broader debt situation as “under control.” He pointed to inherited fiscal pressures and framed the tariff refunds as a discrete, non-recurring expense rather than evidence of structural dysfunction.

The deficit numbers paint a grimmer picture

July 2026 posted a federal deficit of $432.3 billion, the highest single-month deficit ever recorded. For the first ten months of fiscal year 2026, the cumulative deficit has reached approximately $1.799 trillion, putting the full-year deficit on pace to land somewhere north of $2 trillion.

Net interest payments on the national debt have already exceeded $1 trillion annually in recent periods.

Bank of America analyst Michael Hartnett has projected the national debt could reach $50 trillion by July 2029.

What this means for bond markets and beyond

Hartnett’s team has been advocating what they call an “Anything But Bonds” strategy. The logic is straightforward: more debt means more Treasury issuance, which means more supply hitting a market that may not have enough demand to absorb it without yields rising.

Higher yields sound great if you’re buying new bonds. They sound terrible if you’re holding existing ones, because bond prices move inversely to yields. A sustained rise in borrowing costs also ripples through the broader economy, making mortgages more expensive, corporate debt costlier to service, and government interest payments even larger.

The debt went from $30 trillion to $40 trillion in roughly four years. If Hartnett’s projection holds, the next $10 trillion will take about three.

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