Wholesale inflation came in hotter than expected in April, intensifying the pressure on companies to pass rising costs on to customers as Americans remain focused on affordability. The Labor Department said its producer price index, which tracks inflation before it hits consumers, jumped 1.4% in April from March, the biggest monthly gain in more than four years, and rose 6% from a year earlier, the highest point in more than three years. Economists said the report could also shift expectations around the Federal Reserve’s policy path.
The department’s report showed energy as a key driver. Energy prices rose 7.8% from March to April and climbed 22.7% from a year earlier, with gasoline up 15.6% from March to April and diesel rising 12.6%—diesel being widely used in shipping.
Gasoline costs continued to sting consumers as the wholesale increase flowed through to retail. Motor club AAA said gasoline prices rose again to a national average of $4.51 per gallon.
The Labor Department also released a “core” measure that excludes volatile food and energy costs. That component rose 1% from March to April and increased 5.2% from a year earlier, suggesting that the broader price environment was not limited to fuel alone.
Carl Weinberg, chief economist at High Frequency Economics, said in response to the data that it would “set off alarm bells at the Fed” and “add fuel to the political conversation about affordability,” noting that the results were far above expectations. After the United States and Israel attacked Iran on Feb. 28, the report said Tehran closed off access to the Strait of Hormuz, through which a fifth of the world’s oil and liquefied natural gas passes.
On the energy supply side, the report pointed to an escalating strain. The International Energy Agency warned Wednesday that “mounting supply losses from the Strait of Hormuz are depleting global oil inventories at a record pace,” and said the disruptions had reduced global oil supplies by 12.8 million barrels a day since February in what it described as “an unprecedented supply shock.”
The producer price data also reflected knock-on costs in transportation and shipping. The wholesale cost of truck transportation of freight jumped more than 8% from March, while air freight rose 3.6% for the month, a pattern that can translate into higher prices further down the supply chain.
Grace Zwemmer, U.S. economist at Oxford Economics, said diesel fuel remains crucial for food pricing because it powers farm equipment and commercial shipping and trucking. She also noted that food prices rose 0.2% in April, stronger than the 0.6% decline seen in March, and said food could face upward pressure for as long as the war persists.
Wholesale price moves often foreshadow what consumers may face next, and the timing is already colliding with recent inflation readings. This week, the Labor Department said the closely watched consumer price index jumped 3.8% last month from April 2025, the biggest year-over-year increase in more than three years, showing up in everyday categories that include air travel fees and household staples.
Companies that set prices have also had to adjust amid the cost pressure. Walmart announced rare price hikes last year as Trump’s tariffs were rolled out, and the report said rising costs may intensify pressure for more increases. Whirlpool, which makes KitchenAid and Maytag appliances, said its revenue dropped nearly 10% in its most recent quarter and described the war as causing a “recession-level industry decline” that undercut consumer confidence; it also reported announcing a 10% price hike in April and a further 4% increase coming in July.
The Labor Department’s producer price report also landed as the Federal Reserve appeared to be reconsidering the timing of rate cuts. Before the Iran war, the Fed was expected to cut its benchmark interest rate in 2026, but the report said it has turned cautious and is waiting to see how long the conflict lasts and whether higher energy prices spill into other products.
Politically, the report said affordability could become a central issue in the November 3 election determining whether President Donald Trump’s Republican Party keeps control of the Senate and House. The article also noted that Trump has attacked the Fed and its outgoing chair, Jerome Powell, for refusing to slash rates and that Kevin Warsh—his hand-picked choice to succeed Powell—was confirmed by the Senate Wednesday, though it remains unclear whether he would push for lower rates given the uncertainty created by the war.