Consumer prices rose 0.6 per cent in September and were 3.7 per cent higher than a year earlier, the Bureau of Labor Statistics said on Wednesday in its Consumer Price Index release. The 12-month rate was 3.4 per cent in August. The monthly gain followed a 0.4 per cent rise in August.
Excluding food and energy, prices rose 0.3 per cent in the month, the same as in August, and 2.6 per cent over the year, up from 2.4 per cent. The gap between the two annual rates is 1.1 percentage points, by this publication's arithmetic. The gap is mostly gasoline. It is not only gasoline.
What the pump did
The BLS said energy prices rose 5.2 per cent in September on a seasonally adjusted basis, after a 2.1 per cent rise in August, and were 20.4 per cent higher than a year earlier. Gasoline rose 9.1 per cent in the month and 34.2 per cent over the year. The bureau said gasoline accounted for more than half of the monthly increase in the all-items index. Without a seasonal adjustment, gasoline rose 6.5 per cent.
Other fuels were quieter. Electricity rose 0.2 per cent in the month and 4.4 per cent over the year, and piped utility gas fell 0.3 per cent in the month while rising 5.0 per cent over twelve months, according to the BLS.
This is the price move this publication flagged on Sunday as the likely cause of a wide headline-core gap, when forecasters expected headline inflation near 3.7 per cent and core near 2.4 to 2.5. Headline landed at the top of that range. Core landed above it. RBC Economics, at the high end of the forecasts we cited, had expected core to rise 0.2 per cent in the month.
What was not energy
Food prices were unchanged in September and up 2.5 per cent over the year. Food bought for home fell 0.1 per cent in the month and is up 1.8 per cent over the year; the BLS said beef fell 1.0 per cent and milk fell 2.0 per cent. Food away from home rose 0.2 per cent in the month and 3.5 per cent over the year.
Shelter, the largest part of most household budgets, rose 0.4 per cent in the month, after 0.3 per cent in August, and 3.2 per cent over the year. Owners' equivalent rent rose 0.3 per cent in the month and 3.3 per cent over the year; rent of a primary residence rose 0.2 per cent and 2.8 per cent. Lodging away from home rose 2.0 per cent in the month.
Airline fares rose 1.2 per cent in the month and were up 22.4 per cent from a year earlier. Used cars and trucks rose 0.7 per cent in the month but remain 1.5 per cent below a year ago. New vehicles rose 0.2 per cent. Medical care rose 0.1 per cent, with prescription drugs down 1.2 per cent. Communication prices fell 0.2 per cent.
Taken together, the categories that rose fastest are the ones most exposed to fuel: airline fares are the clearest case. That is our reading of the pattern; the BLS release does not attribute individual moves to causes.
What happens next
The bureau also reported a CPI for wage earners, CPI-W, up 3.9 per cent over the year, and a chained index, C-CPI-U, up 3.5 per cent. Its technical note puts the one-month standard error on the all-items index at 0.04 per cent, which gives the all-items figure a 95 per cent band of about 0.08 points.
>>The gap is mostly gasoline. It is not only gasoline.
Two things settle how much of this matters. The first is whether crude holds near its recent level; this publication has tracked Brent's move above $100 and its effect on the Fed's expected path. If gasoline gives back some of September's 9.1 per cent, the headline rate falls without any change in core. The second is whether core keeps drifting up. A core reading of 2.6 per cent is not high, but it is the first step the wrong way after August's 2.4, and the next report, for October, is scheduled for Tuesday 10 November at 8:30 a.m. Eastern, per the BLS. The Federal Reserve's next meeting is on 27 and 28 October, according to its published calendar, and this is the last CPI report it will see before then.
Sources
- BLS, Consumer Price Index, September 2026
- Federal Reserve, FOMC meeting calendar
- Cranberry Journal, September CPI preview, 11 October 2026
Every index change, percentage and the data-collection details come from the Bureau of Labor Statistics Consumer Price Index news release for September 2026, published 14 October 2026 at 8:30 a.m. Eastern. The forecasts mentioned for comparison, including RBC Economics' forecast of 0.2 per cent for core in the month, come from this publication's preview of 11 October, which drew on the Admirals street consensus, the Cleveland Fed nowcast and RBC Economics. The 27-28 October meeting date is from the Federal Reserve's published calendar. The gap arithmetic (3.7 minus 2.6) is this publication's. The analysis is our own.
Topics moneyCPIinflationgasolineFederal Reservehousehold budgets
