September's inflation report delivered the fastest monthly price jump since March, and the timing is awkward for the Federal Reserve because prices heated up in the same stretch the economy grew faster than forecast.
Energy Did the Heavy Lifting in September Inflation
Key US inflation and growth figures, September and third quarter 2026
| Measure | Figure | As of |
|---|---|---|
| Headline PCE, year over year | 3.6% | September 2026 |
| Core PCE, year over year | 3.1% | September 2026 |
| Headline PCE, month over month | 0.5% | September 2026 |
| Gas and other energy goods prices, MoM | 9.2% | September 2026 |
| Third-quarter GDP growth, annualized | 3.4% | Q3 2026 |
| Personal saving rate | 3.8% | September 2026 |
Where the jump came from
The personal consumption expenditures price index, the Fed's preferred inflation gauge, rose 0.5% in September and 3.6% from a year earlier, the Bureau of Economic Analysis reported. That's up from 3.4% in August, though a touch below the 3.7% annual rate economists had penciled in.
Energy carried the move, with gas and other energy goods prices up 9.2% from August after a 4.4% rise the month before. Food and beverage prices, meanwhile, held flat for a second straight month and haven't risen more than 0.5% in any month since the start of 2025.
Gasoline and energy costs have now climbed in six of the year's first nine months, after Iran's restrictions on shipping through the Strait of Hormuz jolted crude markets. Brent hit $114.84 a barrel and West Texas Intermediate $101.13 on Wednesday following a Houthi attack on the biggest refinery in Saudi Arabia.
Stripping out food and energy, core PCE rose 0.3% on the month and 3.1% from a year earlier, both in line with forecasts but faster than August's 0.2% monthly gain and 3% annual rate. The consumer price index pointed the same way, with annual inflation at 3.7% in September, versus 3.4% in August, and core CPI came in at 2.6%.
Economists lean on core as the better guide to where prices settle over time, and policymakers are watching it for evidence that companies are pushing higher fuel costs onto customers.
Inflation Reaccelerated in September
Annual PCE inflation rate, July to September 2026
Bar chart. Annual rate (%). July: Annual PCE Inflation (%) 3.70%. August: Annual PCE Inflation (%) 3.40%. September: Annual PCE Inflation (%) 3.60%.
Spending holds up, income does not
Consumers kept spending through the price increases, with personal consumption expenditures up $113.1B in September, split between $35.1B on goods and $78.1B on services.
Adjusted for inflation, though, real spending rose just $2.6B, while personal income grew only 0.2% and the saving rate sat at 3.8%. The wider economy still outran forecasts, with third-quarter gross domestic product growing at a 3.4% pace, faster than economists expected.
What the Fed does next
Markets are pricing in better than an 80% chance of a December rate hike after the Fed held rates steady on Wednesday, a pause Chair Kevin Warsh did little to explain.
Strong growth also takes away the usual case for patience, since a central bank worried about a slowdown can live with hot prices for a while and one looking at 3.4% growth has far less room to wait.
TS Lombard's Dario Perkins argues the Fed could hike further if demand tied to artificial intelligence keeps fueling inflation, and FedWatch Advisors' Ben Emons has said more tightening may be needed while energy prices and geopolitical tensions cloud the outlook.
Economists are also watching the data center buildout, since computer component prices have surged. For borrowers, another hike would keep mortgage, credit card and auto loan rates elevated for longer, with headline inflation still running 1.6 percentage points above the Fed's 2% target.
