Here's a number that should terrify anyone thinking about America's fiscal future: the federal government now pays nearly $970 billion annually just to service interest on the national debt. That's triple what it paid in 2020, and it now exceeds what we spend on both national defense and Medicaid.
Let that sink in. We're paying more to creditors than we spend defending the country.
The $38.8 trillion national debt has become a slow-motion fiscal crisis that almost nobody in Washington wants to discuss. Interest costs now consume one-fifth of all federal revenue—money that can't be spent on infrastructure, education, or any other national priority. It's gone before Congress even writes a budget.
As a share of GDP, interest expenses have doubled from 1.6% in 2021 to 3.2% in 2025. The Congressional Budget Office projects this trajectory will only worsen: by 2036, interest payments will hit $2.1 trillion annually—double today's already-staggering figure.
That means interest costs will consume one-quarter of federal revenue within a decade. By 2029, debt service will surpass Medicare spending. By 2047, it will eclipse even Social Security, becoming the single largest line item in the federal budget.
Cui bono? Who benefits from this arrangement? Bondholders—many of them foreign governments and institutional investors—while American taxpayers foot an ever-growing bill that crowds out everything else.
Budget experts call this "one of the most consequential—and least discussed—fiscal emergencies in the country's history." They're not wrong. Rising interest costs will account for the majority of federal spending growth over the coming decade, leaving less and less room for discretionary policy choices.
Here's the brutal math: when interest rates were near zero during the pandemic, Washington borrowed trillions at rock-bottom rates. Now those bills are coming due in a higher-rate environment, and the cost is crushing. Every percentage point increase in average interest rates adds roughly $400 billion to annual interest costs over time as old debt rolls over.
The Federal Reserve's aggressive rate hikes to combat inflation made this problem exponentially worse. While inflation has cooled, the debt service burden remains—a permanent fixture of fiscal policy for the foreseeable future.
What makes this a crisis isn't just the current numbers—it's the trajectory. Unlike defense or Medicaid, which Congress can theoretically cut, interest payments are mandatory. You can't negotiate with bondholders or skip payments without triggering a sovereign debt crisis.
The policy implications are stark. Every future spending proposal—whether it's infrastructure, defense modernization, or climate investment—must now compete with a growing debt service burden that crowds out everything else. Washington has effectively mortgaged future policy flexibility to finance past spending.
And yet, you'll notice this issue barely registers in political debates. Both parties have contributed to this mess through deficit spending and tax cuts that weren't paid for. Now we're stuck with a structural problem that will constrain American fiscal policy for generations.
The numbers don't lie. The question is whether anyone in power will be honest about what comes next: either significant spending cuts, major tax increases, or both. There are no other options when you're paying nearly $1 trillion a year just to service existing debt.
