Record Diesel Prices and Stubborn Inflation Are Squeezing Every American's Wallet

Inflation Stays Stuck as Energy Costs Surge

Inflation remained stubbornly high in August, largely on the back of higher energy prices amid the Iran war. The latest inflation report from the Department of Labor showed that prices continued to rise at a fast pace, leaving a near-term rate cut by the Federal Reserve unlikely. According to the Consumer Price Index published Friday, prices rose 0.4 percent last month compared with 0.1 percent in July, as annual inflation remained stalled at 3.4 percent.

The overall energy index is up 16.3 percent over the 12 months ending in August, with energy commodities — gas, fuel oil, and motor fuels — up 28 percent. The food index increased 0.1 percent in August and has risen by 2.7 percent over the past year, slower than broader inflation, with groceries up 2.2 percent. Even so, the real pain is showing up at the pump — and far beyond it.

Diesel Crosses $6 a Gallon for the First Time Ever

The nationwide average price of diesel hit $6 per gallon on Friday, September 12, for the first time ever — an ominous record for the fuel that powers much of the U.S. economy. The price stood at $6.05 as of Friday morning, according to motor club AAA. This marks a 63 percent cost increase from a year ago, when a gallon of diesel cost around $3.71, and a nearly 14 percent jump from last month's price of $5.32.

Diesel prices crossed the historic threshold after renewed fighting between the U.S. and Iran pushed both global and U.S. crude oil prices above $100 per barrel once again. Ukraine also launched attacks targeting Russia's vital oil sector, with the Ukrainian military reporting it hit a refinery in Siberia — causing fuel shortages in Russia. The convergence of two major global conflicts is hitting American consumers at exactly the same time.

Why Diesel Prices Hit Everyone — Even Non-Drivers

Diesel is the workhorse of the American economy. When a tractor plows a field, that's diesel. When a truck carries freshly picked strawberries to the grocery store, that's diesel, too. The school bus taking kids to school, the bulldozer demolishing a house down the street, and the dump truck hauling away garbage — all diesel. As KPMG chief economist Diane Swonk put it: "The cost of diesel gets into just about everything" — from running a farm to the cost of food, and everything across the economy that's shipped.

Groceries are likely to be especially sensitive to higher diesel prices, in part because many supermarkets are already operating on razor-thin margins due to the high cost of beef. Beyond the supermarket, grocery prices will also reflect the rising cost of diesel across the entire food supply chain, starting with farmers. The impact of $6-per-gallon diesel will make it even harder for some U.S. farmers, already under pressure from a fertilizer shortage, to stay afloat. Brown University's real-time tracker estimates that higher diesel prices have added $46.7 billion to fuel costs since the Iran war began, equivalent to about $357 per U.S. household.

The Fed's Next Move and What Comes Next

The inflation report comes ahead of the Federal Reserve making its latest interest rate decision next week, with growing expectations that rates will be increased in a bid to slow the pace of rising prices. Diesel prices hitting record highs will put upward pressure on inflation in the medium term "because it impacts the cost of hauling and trucking and farming equipment, which eventually flows through supply chains and finds itself in higher prices on the shelves for food, broader goods," according to analysts at Capital Economics.

The Department of Energy's statistics arm raised its diesel forecast for 2027 this week, now expecting retail diesel to average $4.40 a gallon next year — 33 cents higher than previously projected, but lower than today's price. President Trump acknowledged this week that oil prices likely won't come down until after the U.S. midterm elections in November. For millions of Americans watching their grocery bills, delivery fees, and gas receipts creep higher, that's a long time to wait.