US debt interest hits $857B, topping Medicare and military
Surging US debt servicing costs have overtaken major budget line items, highlighting a widening fiscal deficit as the administration pursues simultaneous tax cuts and defense spending hikes.
The US federal deficit reached $1.4 trillion in the first nine months of fiscal 2026, pushing the total national debt to $39.64 trillion as of July. According to a July 9 budget review from the Congressional Budget Office, this deficit represents a $35 billion increase compared to the same period a year earlier, signaling an accelerating fiscal deterioration.
The primary driver of this expansion is the cost of servicing the debt itself. The government spent $857 billion on net interest from October 2025 through June 2026. At roughly $95.2 billion per month, this expense now exceeds both the military and Medicare as the largest single line item in the federal budget. Spread across the roughly 129 million US households, the burden equates to approximately $737 per household per month.
For fixed-income investors and credit analysts, this shift carries significant structural implications. A federal budget increasingly dominated by interest payments inherently limits fiscal flexibility during economic downturns or geopolitical crises. Furthermore, the constant need to issue new debt to cover these costs expands the supply of Treasuries. This dynamic risks keeping upward pressure on long-term yields, which in turn elevates the baseline cost of capital for corporations and consumers.
The structural challenge is compounded by contradictory policy moves emanating from the White House. On the revenue side, the administration’s One Big Beautiful Bill Act is projected to reduce tax collection by $5 trillion over the 2025 to 2034 period, according to estimates from the Tax Foundation.
Conversely, spending proposals are moving sharply higher. The Department of War has requested $1.5 trillion in funding for fiscal 2027. This marks a 42% increase in defense spending, adding substantial weight to an already strained balance sheet.
Addressing a debt burden of this magnitude typically requires a government to raise revenues or cut expenditures. With current legislative efforts actively reducing income while expanding major budget categories, market participants are left to price in a fiscal trajectory where interest obligations consume an ever-larger share of federal resources.
