U.S. consumer prices rose 0.4% in August, accelerating from a 0.1% gain in July as gasoline and other energy costs lifted household expenses, the Labor Department reported Friday. The Consumer Price Index increased 3.4% over the 12 months through August, matching July's annual pace. Excluding volatile food and energy components, core CPI rose 0.3% for the month, following a 0.2% increase in July. Core prices were up 2.4% from a year earlier, easing from a 2.5% annual increase in July.
Gasoline was the largest contributor to the August increase. The gasoline index climbed 3.9%, accounting for more than one-third of the monthly advance in the overall CPI. The broader energy index rose 2.1% during the month. Over the past year, energy prices increased 16.3%, largely reflecting a 27.4% increase in gasoline prices. Shelter costs, a closely watched category because of their large weight in the CPI, rose 0.3% after a 0.1% increase in July. Food prices increased 0.1%, with food away from home rising 0.3%. Other categories recording monthly gains included communication, lodging away from home, airline fares, education, and used cars and trucks.
The sharp rise in fuel costs has been a principal source of renewed headline inflation pressure, even as the underlying inflation rate has moderated. The divergence between the 3.4% headline annual rate and the 2.4% core annual rate suggests that energy volatility, rather than broad-based price acceleration, is driving the August pickup. For commercial real estate and other interest-rate-sensitive sectors, the persistence of elevated headline inflation could keep financing conditions tighter than the cooling core trend alone would imply.
What remains unknown is whether the gasoline-driven increase represents a temporary supply shock or the start of a broader reacceleration. The report does not provide forward-looking projections, and the single source offers no detail on wage growth, inflation expectations, or Federal Reserve policy responses. Subsequent months will show whether the energy surge fades and whether shelter costs, which rose 0.3% in August, continue to firm after July's 0.1% gain.