US Inflation Rose to 3.6% in September, the Fed’s Favorite Gauge Shows

In short: US inflation picked up in September 2026. Prices rose 3.6% compared with a year earlier, up from 3.4% in August, according to data from the US Bureau of Economic Analysis. That is still well above the Federal Reserve’s 2% target, so borrowing costs are likely to stay higher for longer.

What happened

The personal consumption expenditures price index, known as PCE, is the inflation measure the Federal Reserve watches most closely. It rose 0.5% from August to September, and 3.6% over the past year. Core PCE, which leaves out food and energy prices because they jump around a lot, rose 0.3% in the month and 3.1% over the year, up from 3.0% in August.

Energy played a big part. Prices for gasoline and other energy goods jumped 9.2% from August, as fuel costs stayed high. Consumer spending rose 0.5% in dollar terms in September, but once inflation is taken out, spending was roughly flat, which means households bought about the same amount while paying more.

The report landed one day after the Federal Reserve held its benchmark interest rate steady at 3.75% to 4.00% on October 28. At the same time, the US economy grew at a 3.4% annual rate in the third quarter of 2026, faster than the 2.2% pace in the second quarter. Strong growth plus rising prices is a tricky mix for the Fed, because raising rates cools inflation but can also slow the economy.

Why it matters for beginners

Inflation is simply a measure of how fast prices are rising. When it goes up, your money buys less than before. A 3.6% inflation rate means something that cost 100 dollars a year ago now costs about 103.60 dollars.

For beginners, three things follow from this report. First, interest rates on loans, credit cards, and mortgages tend to stay higher when inflation is above target, because the Fed uses higher rates to slow price rises. Second, savings accounts and bonds may pay more interest, but only if that interest beats inflation do you actually gain buying power. Third, markets now expect the Fed could raise rates again in December, so expect more ups and downs in stock prices around the next inflation and jobs reports.

This is not a reason to panic or to change your whole plan. Inflation reports come out every month, and one month does not set the trend. What matters is the direction over several months, and whether wages keep pace with prices.

Related reading: central banks held rates steady this week.

What to watch next

Watch the Fed’s December meeting, where traders now see a real chance of another rate hike. Before that, the next jobs report and the October inflation data will shape expectations. Also watch energy prices, since fuel was the biggest driver of September’s jump. If energy costs cool, headline inflation could ease even if core prices stay sticky.

FAQ

What is PCE inflation?

PCE stands for personal consumption expenditures. It tracks what households spend on goods and services, and the Fed prefers it because it covers a wider range of spending and adjusts when shoppers switch to cheaper options.

What is the difference between headline and core inflation?

Headline inflation includes everything, including food and energy. Core inflation leaves those two out because their prices swing sharply, so core gives a steadier read on the underlying trend.

Why does the Fed target 2% inflation?

The Fed aims for 2% over time because a little inflation is normal in a growing economy, while very high inflation erodes savings and very low inflation can signal weak demand.

Does this report mean rates will definitely rise in December?

No. The Fed looks at many reports, including jobs, wages, and spending, before deciding. September’s data keeps a December hike on the table, but it does not guarantee one.