U.S. Inflation Hits 4.2% as Iran War Drives Energy Costs

Consumer prices in the United States rose at an annual rate of 4.2% in May, the highest level in over three years, according to the latest Consumer Price Index report from the Bureau of Labor Statistics. The third consecutive monthly increase — up from 3.8% in April and 3.3% in March — reflects the deepening economic impact of the ongoing U.S.-Israel conflict with Iran, which has disrupted global energy markets since late February.

Context: From 2.4% to 4.2% in Three Months

Before the conflict began, inflation stood at just 2.4% in February 2026, nearing the Federal Reserve’s 2% target. The reversal has been dramatic. Iran’s effective closure of the Strait of Hormuz — a waterway through which approximately one-fifth of the world’s oil and gas is shipped — has sent energy prices soaring and reignited inflationary pressures that had been steadily cooling since the post-pandemic peak of 9.1% in June 2022.

According to The Guardian, energy prices accounted for more than 60% of the overall monthly CPI increase. Gasoline prices jumped 40.5% from a year earlier, with the national average for a gallon of regular gas reaching $4.15, according to AAA — up sharply from $2.98 on February 28, the day President Donald Trump launched strikes on Iran.

Beyond the Pump: Broader Price Pressures

The inflation surge extends well beyond the gas station. BBC News reports that airline fares rose 26.7% annually, while food-at-home costs climbed 2.7% year-over-year, with tomato prices surging 32%, lettuce jumping nearly 25%, and coffee prices rising 17.5%.

Core CPI, which excludes volatile food and energy prices, rose 2.9% annually — up slightly from 2.8% in April but below economists’ expectations. Month-over-month core CPI rose just 0.2%, a softer reading that Business Insider notes offers “some reassurance that inflation expectations have not yet become unanchored,” according to Arielle Ingrassia, associate director at Evelyn Partners.

Wage Growth Falls Behind

Average hourly earnings increased 3.4% year-over-year, meaning inflation outpaced wage growth for the second consecutive month. Real earnings fell 0.7% over the year, according to Business Insider. Mark Hamrick, senior economic analyst at Bankrate, told the outlet that “the dividing line between the haves and the have nots is dictating whether consumers are able to keep with rising price levels.”

CBS News reports that three-quarters of Americans say their incomes are not keeping up with inflation, according to a recent CBS News poll. Consumer sentiment has plummeted to historic lows, falling for three consecutive months, according to University of Michigan data.

White House Response

The White House attributed the price increases to “temporary disruptions” from the conflict. “Despite temporary disruptions as a result of Iran’s efforts to subvert the free flow of energy, President Trump’s broader economic agenda continues to deliver meaningful results for the American people,” spokesperson Kush Desai said in a statement, pointing to declining prices in prescription drugs, dairy, cars, and insurance.

President Trump himself told reporters on Tuesday that he did not believe U.S. fuel prices were “very high, relatively speaking,” and has previously said he does not think about the cost of living “even a little bit” in the context of the war, stressing that Iran cannot be allowed to obtain a nuclear weapon.

The Fed’s Dilemma

The inflation data lands just days before the Federal Reserve’s next policy meeting on June 17 — the first under new Chair Kevin Warsh, who has signaled support for lower rates. However, economists widely expect the Fed to hold rates steady at 3.5% to 3.75%.

Goldman Sachs has pushed its forecast for rate cuts to 2027, while JP Morgan Global Research has warned that the Fed may need to raise rates by 2027 if inflation persists. Chris Zaccarelli, chief investment officer at Northlight Asset Management, told CBS News: “The Fed will be in no position to cut rates if this continues. More importantly — the Fed’s next move may need to be a hike, and not a cut as many had expected.”

Still, Stephen Brown, chief North America economist at Capital Economics, told the BBC that May’s rise alone was “not large enough to prove any ammo” to those on the rate-setting committee who want to push rates up.

What to Watch

Some economists, including Nancy Vanden Houten of Oxford Economics, believe May could mark the peak for headline CPI, noting that gas prices have declined sharply so far in June. However, others warn that as long as the Strait of Hormuz remains closed, supply chain disruptions will continue to fuel inflation. Economists caution that even with a swift resolution to the conflict, restoring normal shipping through the waterway could take until 2027.

With the November 2026 midterm elections approaching, sustained inflation poses a significant political challenge for President Trump and Republicans, who campaigned in 2024 on promises to cut prices. The combination of rising inflation and a still-strong job market — the U.S. added 172,000 jobs in May — has raised the specter of stagflation, a scenario that central banks and policymakers have spent decades trying to avoid.