The annualized cost of servicing US federal debt has climbed to a record $1.38 trillion, equal to 4.2% of GDP — the highest share of the economy interest payments have consumed since 1997. The figure is nearly $900 billion higher than it was five years ago, a roughly 200% increase driven by both a larger overall debt load and materially higher interest rates on the securities financing it.
The growth trajectory has been steep in percentage terms as well: interest costs have compounded at an average annual growth rate of roughly 24% over the past five years, a pace that outstrips nearly every other major category of federal spending. That comparison has become a recurring talking point in fiscal policy debates, since interest payments now rank among the largest single line items in the federal budget, alongside — and by some measures ahead of — programs like Medicare.
Official Data Tells a Slightly Different Story, Same Direction
The Congressional Budget Office's own fiscal-year framing puts net interest spending for 2026 closer to $1.04 trillion, a 7% increase from the prior year, with Treasury's own interest expense dataset showing net interest on public debt totaling $963 billion through the first ten months of the fiscal year, or roughly $3.18 billion a day. The gap between that figure and the $1.38 trillion annualized number reflects differences in accounting period and methodology, but both measures point in the same direction: interest costs are rising faster than the economy that has to absorb them.
Why It Matters Beyond Washington
Rising interest costs eventually work their way into markets far outside government bonds. Larger deficits financed at higher rates mean heavier Treasury issuance, which has been a factor cited in the recent run-up in long-term Treasury yields, including a 10-year auction that cleared at its highest level since 2007 and a 30-year yield that touched levels last seen before the 2008 financial crisis. For risk assets, a federal government competing harder for capital to cover its own interest bill tends to raise the bar for what other investments need to offer to attract the same money.
