US Debt and Inflation: Why the Fed Can't Win on Rates

The Federal Reserve has again signaled a possible rate hike by year’s end to counter inflation that remains above its 2% target. The decision exposes a deeper bind in the US economy: raising rates can suppress inflation, but it also drives up interest on an already enormous national debt, leaving the government’s finances even tighter.

The dilemma did not appear overnight. For years, the US has kept its debt running by borrowing new money to repay old, like a person holding 20 credit cards who pays only the minimum interest each month. As the debt snowball grows, the interest burden gets heavier, and eventually comes a tipping point where even the interest is hard to pay. At that point, the choice is either to let the printing presses run, as Turkey and Argentina have done, or to cut rates to zero to ease the interest load — but the latter conflicts with the current goal of controlling inflation.

How Rates Drive the Debt Bill

The rate the Fed sets is tightly linked to interest on Treasury debt. The higher the rate, the more interest the government must pay. US national debt now exceeds $34 trillion, and each one-percentage-point rise in rates adds hundreds of billions of dollars to annual interest costs. That explains why the Fed hesitates to raise rates even under inflation pressure — it must walk a tightrope between suppressing prices and avoiding fiscal deterioration.

The Compounding Effect of Inflation

The Fed fixates on a 2% inflation target because of compounding: even at 2% a year, prices would rise nearly 22% over a decade. Between 2020 and 2026, US inflation swung between 2% and 4%, peaking at 8% in 2022. Prices are now about 29% higher than in 2020, far above Europe’s 22% and China’s 4%. If inflation persists, US price growth could soon top 50%.

How Fragile Households Are

Inflation hits ordinary families especially hard. A 2025 financial health report from PNC Bank found that 67% of Americans spend their entire monthly income with nothing left over. The classic “$400 emergency test” shows that 37% of Americans could not cover a $400 emergency, and 12% could not even borrow the money. Rising prices therefore squeeze most households’ room to live, and any unexpected expense can trigger a financial crisis.

The Policy Trap

Faced with high inflation, if the Fed keeps raising rates, interest on the national debt rises and the fiscal deficit widens; if it holds rates low, inflation may spiral and further erode purchasing power. The bind has left US economic policy at a standstill. The deeper risk is that global investors’ confidence in dollar assets could waver, pushing borrowing costs higher and creating a vicious cycle.

Whether the US can control inflation without triggering a fiscal crisis remains unknown. What is certain is that the entanglement of debt and inflation has left policy makers with less and less room to maneuver, and every decision must weigh short-term pain against long-term risk.

Source: Zhihu https://zhuanlan.zhihu.com/p/2095489844218684740?utm_medium=openapi_platform&utm_source=b38f6831b176