US Economy Grew 3.4% in Q3 — but Inflation Just Heated Up Again

In 60 seconds: The US economy grew at a 3.4% annual pace in the third quarter, beating forecasts — but September's PCE inflation heated up to 3.6%, giving the Federal Reserve a fresh headache just one day after it held rates steady.

Thursday morning delivered the year's most awkward economic double-act: genuinely good growth news and genuinely uncomfortable inflation news, in the same release window. Here's the thing: both numbers are real, and they pull the Fed in opposite directions.

The Federal Reserve's Eccles Building in Washington. Photo: Federal Reserve / Wikimedia Commons (public domain).

What happened

The Bureau of Economic Analysis released its advance estimate of third-quarter GDP on Thursday at 8:30 am ET: real GDP increased at an annual rate of 3.4% in July through September, up from 2.2% in the second quarter. That beat the 3.2% consensus estimate and even edged past the Atlanta Fed's final 3.3% GDPNow forecast.

At the same time, the September Personal Income and Outlays report showed the Fed's preferred inflation gauge moving the wrong way. The PCE price index climbed 0.5% on the month, after a 0.3% rise in August, and 3.6% over the year, up from 3.4%. Strip out food and energy and core PCE rose 0.3% on the month and 3.1% on the year, up from 3.0%.

The timing is what makes this release sting. It landed one day after the Federal Reserve held its benchmark rate at 3.75%–4.00% and said inflation "remains elevated." The Fed got its growth answer and its inflation answer within 24 hours — and they disagree with each other.

Latest verified facts

So which number wins? Start with what the BEA actually printed. Growth was broad at home: investment, consumer spending, and government spending all rose. Trade was the drag — exports fell while imports, which count as a subtraction in GDP math, increased. Consumer spending grew 3.8% in the quarter, matching the prior quarter's pace.

The details under the headline are more mixed than the 3.4% suggests. Real final sales — GDP minus inventory changes — grew just 1.7%, down from 2.8% in the prior quarter. That gap says inventory accumulation did a lot of the lifting. Lower exports subtracted 0.68 percentage points and higher imports subtracted 2.64 points.

On the household side, September spending rose 0.5%, slowing from August's 0.9% but still outrunning the 0.2% rise in personal incomes. Gasoline did much of the damage in the inflation report: consumers paid more for fuel and other goods, and the Fed chair himself pointed to energy prices moving higher again in recent weeks. One caution that applies to every number here: this is the advance estimate, the first of three BEA readings, and it will be revised — the next estimate lands November 25.

Why it matters

For months the debate was whether the economy could keep growing without inflation flaring back up. Thursday's answer was: yes to growth, no to comfort. A 3.4% quarter is strong by any standard, and it backs the Fed's own message that growth had strengthened. But PCE drifting the wrong way — 3.4% to 3.6% headline, 3.0% to 3.1% core — keeps the Fed's 2% target looking distant. The gauge has now run above that target since 2021.

And because PCE is the Fed's preferred measure, not CPI, this report carries more weight inside the central bank than the CPI print did. September's CPI had already shown prices rising 0.6% on the month with gasoline up 9.1%. Now the Fed's own yardstick confirms the same direction. That's why traders moved fast: markets were pricing roughly an 84.6% chance of a December rate hike after the release, per CME FedWatch.

Impact on the USA and the world

For American households, the squeeze is visible in the gap between the two September numbers: incomes up 0.2%, spending up 0.5%. People spent faster than their pay grew, with fuel taking a bigger share — the same pressure retirees watching their Social Security raise get eaten by Medicare costs know all too well. For borrowers, a December hike would keep mortgage and credit-card rates higher for longer, even as the job market and spending look healthy.

For markets, the mix is genuinely two-sided. Strong growth supports earnings, but hotter inflation supports higher-for-longer rates — and the soft final-sales detail tempers the celebration. For the rest of the world, rising US imports mean exporters keep selling into America even as US exports fell, a mixed picture for trading partners that also have to read the same Fed tea leaves: a US hike in December would ripple through the dollar and global borrowing costs.

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What happens next

Three dates now decide how this story ends. Friday brings the Employment Cost Index, a quarterly read on what employers are actually paying. November 25 brings the BEA's second estimate of Q3 GDP, when today's 3.4% could move in either direction. And December 8–9 brings the FOMC meeting where the hike question gets answered.

Our take: the Fed now has to weigh a genuinely strong quarter against inflation drifting the wrong way — and with markets already pricing a December hike near 85%, the burden of proof has flipped. The next data has to cool, not just hold, to talk the Fed out of it. The economy is running hot, and inflation is running hotter — December just got a lot more interesting.

Sources: U.S. Bureau of Economic Analysis (advance GDP estimate and Personal Income and Outlays, October 29, 2026); Reuters; The Wall Street Journal; CME FedWatch.