Inflation’s Next Wave? A Critical U.S. Manufacturing Gauge Just Surged 10% Higher

Factory purchasing managers paid sharply more for materials in September. The Institute for Supply Management (ISM) reported that its Manufacturing Prices Paid Index rose from 71.1 to 77.9, a one-month gain of about 9.6% and the highest reading since May. A reading above 50 signals rising prices; near 78 indicates broad, accelerating increases.

It was also the index’s largest monthly increase since February. Since the start of the year, the index has gained 19.4 points, its third-biggest nine-month increase since 2021. That year is the right comparison. In 2021, factory input costs rose this quickly and reached store shelves within months.

Why Demand Is Driving Prices Higher Now

What stands out in September is the reason for the increase. Factories are busy. The ISM’s headline Purchasing Managers’ Index (PMI) came in at 54.5, its ninth consecutive month of expansion and its longest streak since 2022. New orders rose to 55.3. The backlog of unfilled orders jumped 4.6 points to 56.4, its second-highest level since May 2022.

Mark Vitner, chief economist at Piedmont Crescent Capital, named his review “The Order Book Reopened as Prices Snapped Back.” When orders arrive faster than plants can fill them, suppliers gain pricing power and manufacturers have less room to absorb increases.

Consumers are creating that demand. Retail sales hit a record $737.8 billion in August. That was 1.1% more than in July and 5.4% more than a year earlier. When shoppers keep spending at that pace, companies can pass along higher costs. Imports are rising quickly as well. In July, the trade deficit widened by $17.4 billion to $88.6 billion, which is outside its typical range of -$60B to -$80B.

What Higher Factory Costs Mean for Your Household Budget

Inflation was already running above target before this new pressure showed up. The Consumer Price Index (CPI) rose 3.4% from a year earlier in August, including a 0.4% increase in that month alone. Core Personal Consumption Expenditures (PCE) inflation, the Federal Reserve’s preferred measure, was 3.0%, compared with the central bank’s 2% target.

Higher producer costs typically reach consumers within months, first in goods made from metals, plastics, chemicals and packaging: appliances, auto parts, home improvement supplies and packaged food. Households should expect goods prices to rise through the holiday season and into early 2027.

The Fed is looking at the same data. Reuters reported that August inflation rose below expectations, giving the Fed breathing space. Bloomberg reported that Scott Bessent urged the Fed to keep an “open mind” on the inflation outlook. The September factory survey suggests that breathing space may not last. The CPI figures that pleased policymakers measure prices that were set before this jump in input costs.

Three Signals to Watch Before Year-End

Three readings will show whether September was a one-time jump or the start of a lasting rise in prices. The first is the ISM’s October report, due in early November. A second straight prices reading in the high 70s would confirm the pressure is staying. The second is the backlog index. If factories add capacity and work through their orders, their pricing power fades.

If backlogs keep growing, it strengthens. The third is goods prices in the next two CPI reports. If goods inflation speeds up while core PCE stays at 3.0%, the Fed loses the room August gave it. Borrowers hoping for lower rates would then face a longer wait.

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