Treasury data on Friday showed net interest payments hit $1.05 trillion for fiscal 2026, up from $970 billion in fiscal 2025. The year over year jump in net interest outlays was $81.4 billion.
Two forces explain it. Washington is paying interest on a much larger pile of IOUs - a widely watched debt measure now tops $32 trillion, about $10 trillion higher than five years ago - and it is paying more per dollar of debt. By late September, the average rate on marketable Treasuries stood at 3.52%, more than twice the 1.47% level from five years earlier.
Yields have kept climbing since September. Bloomberg's US Treasuries index sits near 5%. That climb has led Treasury Secretary Scott Bessent to take unusual steps to limit the move. Even so, demand at auctions has held up, and pricier borrowing has not choked off credit.
"It doesn't seem like a crisis," said Louise Sheiner, a Brookings Institution senior fellow and former Fed economist. She cautioned that a true break would come if "some lenders are going to decide not to lend to us," which could cut the Treasury off from markets.
Gennadiy Goldberg, who runs US rates strategy at TD Securities, argued the growth backdrop is buying time, noting nominal GDP is running faster than Treasury yields. The nominal year on year GDP increase in the second quarter was 6.3%. "A fiscal apocalypse is not upon us just yet," he wrote.
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"Somehow we're managing, even with interest rates going up," Congressional Budget Office Director Phillip Swagel said on Oct. 8 in Minneapolis. But he warned that a negative shock can create a "turbocharger effect," with higher rates worsening deficits and debt, which then push rates higher. The CBO projected in February that the debt to GDP ratio will set a new record above 106% in 2030, surpassing the 1946 high. He also noted that market participants have become more attentive to this message over the past two years.
Interest costs have more than doubled since 2022 and now rank among the three largest federal outlays, trailing only Social Security and Medicare. Completing the top five are Defense and Medicaid.
History offers a playbook. When interest burdens were previously near today's levels relative to the debt, President George H.W. Bush signed tax increases in 1990 after pledging not to, and President Bill Clinton raised taxes further in 1993. The post Cold War drop in defense spending and late 1990s growth tied to the internet also lifted the fiscal picture.
At present, Bessent and other Trump administration officials are touting artificial intelligence as a growth engine to reduce the debt ratio. Budget specialists are doubtful it will be enough, pointing to upward pressure from defense and entitlement spending and to growth that is unlikely to lift revenues sufficiently. "The problems only getting worse, so we shouldn't be debating whether to wait for the catastrophe - we should be working on it now," said Brett Loper, policy executive vice president at the Peterson Foundation. "It's going to be really hard to climb out of this problem."
For markets, the near term still looks navigable. Auction demand is solid, credit continues to flow, and several economists say this is not yet a breaking point. The Fed's policy rate is 3.75% to 4% and is expected to rise at least once more, which would lift the cost of short term debt that Bessent has increasingly favored. Karen Dynan, a Harvard economics professor and former Treasury official, said, "I don't think a fiscal crisis is imminent, we still have a pretty strong economy," while warning that with so much debt outstanding, interest costs can compound quickly and may spur calls for action.
In plain English: the rate path matters. TD Securities estimates that a 1 percentage point increase across the yield curve would raise 2027 interest expenses by $310 billion. Later this month's GDP report will show whether nominal growth continues to run ahead of yields - a key cushion for revenues and, by extension, for financing costs.
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