U.S. consumer inflation picked up pace in May, posting its fastest annual rise in roughly three years as energy costs - led by gasoline - helped push the Consumer Price Index higher. The CPI climbed 4.2% in the 12 months through May, the largest year-on-year increase since April 2023, following a 3.8% annual gain in April.
On a monthly basis, consumer prices rose 0.5% in May after a 0.6% increase in April. These month-to-month gains matched economists' expectations, who had forecast both the 4.2% year-on-year increase and the 0.5% monthly advance.
Excluding food and energy, so-called core CPI rose 2.9% year-on-year in May, up from a 2.8% annual increase in April. Core prices, which remove volatile components, advanced 0.2% on the month after a 0.4% rise the prior month.
The report highlighted mounting pressure on household budgets. Evidence cited in the data suggests more consumers have been drawing on savings to fund spending as price growth outpaced wage gains for a second consecutive month. That dynamic - where inflation erodes purchasing power - could weigh on overall economic growth if sustained.
Energy costs were a notable driver of the May inflation uptick. The national average price of gasoline increased 8.8% in May to $4.60 a gallon, according to data from the U.S. Energy Information Administration. At one point earlier in the period, gasoline prices had risen by more than 50% compared with levels before a military engagement involving the U.S. and Israel and Iran late in February. Prices eased in recent weeks amid a ceasefire, leading some economists to tentatively consider May as a potential peak for the CPI.
The inflation release followed a labor-market update showing the economy extended a run of stronger-than-expected job growth into its third consecutive month in May. The unemployment rate held at 4.3% for the third straight month, indicating continued labor-market resilience alongside rising prices.
Policymakers at the U.S. central bank monitor a different inflation gauge - the Personal Consumption Expenditures Price Indexes - against their 2% target. All of the headline inflation measures, including the CPI and the Fed's preferred PCE indexes, remain well above that objective.
Financial markets have begun to price in the possibility of further monetary tightening, though economists maintained that the threshold for the central bank to raise rates again remains high. The persistence of inflation and strength in the labor market complicate the outlook for interest-rate policy, leaving central-bank decisions dependent on incoming data.
Beyond macroeconomic and policy implications, the surge in living costs presents political risks. Rising inflation is a liability for President Donald Trump and the Republican Party as they seek to hold control of Congress in the November midterm elections. Voters who backed Mr. Trump in the 2024 presidential election in part because of a pledge to reduce inflation may be increasingly frustrated; his approval rating has fallen amid public dissatisfaction with economic conditions.
Overall, the May CPI report underscores the tension between sticky inflationary pressures and a still-robust labor market. How long elevated prices persist will shape consumer behavior, corporate planning and the Federal Reserve's policy calculus in the months ahead.