American factories are still expanding, but September’s data reveals a growing problem beneath the headline: manufacturers are facing sharply higher input costs, tariff uncertainty and renewed supply-chain pressure.
U.S. manufacturing extended its expansion streak to nine consecutive months in September, according to the latest Institute for Supply Management report. The Manufacturing PMI came in at 54.5, just below August’s 54.6 but comfortably above the 50 level that separates expansion from contraction. Institute for Supply Management
The headline looks encouraging. New orders increased, employment strengthened and order backlogs accelerated.
But manufacturers are paying substantially more for the materials needed to keep factories running.
ISM’s Prices Index jumped to 77.9 in September from 71.1 in August, while the organization reported higher prices for steel, aluminum, copper, electronic components, memory components, semiconductors, diesel fuel, freight and other inputs. Institute for Supply Management
That creates a complicated picture for the American industrial economy.
Factories are growing.
Demand is holding up.
But the cost of producing goods is rising quickly.
Background and Context
The September report marks the ninth consecutive month of expansion for the U.S. manufacturing sector after a 10-month period of contraction. ISM’s Manufacturing PMI reached 54.5, while the overall U.S. economy remained in expansion for the 23rd consecutive month. Institute for Supply Management
The improvement is not limited to one narrow part of the economy.
ISM reported expansion in five of the six largest manufacturing industries in September:
- Computer and electronic products
- Food, beverage and tobacco products
- Transportation equipment
- Machinery
- Chemical products
That breadth matters because manufacturing is one of the clearest windows into business investment, inventories, industrial demand and supply-chain conditions.
The September numbers also show that companies are receiving more orders.
The New Orders Index rose to 55.3, up from 53.7 in August. The Backlog of Orders Index climbed to 56.4, its highest reading since February according to ISM’s September report. Institute for Supply Management
Production remained firmly in expansion territory at 56.7, although that was down from August’s 58.3.
Employment provided another positive signal.
The Manufacturing Employment Index increased from 51.2 to 52.7, marking its third consecutive month of expansion. Institute for Supply Management
So why are manufacturers still worried?
The answer is increasingly visible in the cost data.
Latest Update: U.S. Manufacturing Expands While Prices Surge
The most important number in September’s report may not be the 54.5 PMI.
It may be 77.9.
That is the September reading for ISM’s Prices Index, which measures the direction of prices paid by manufacturers. The index increased 6.8 percentage points from August and indicated that raw-material prices had increased for the 24th consecutive month. Institute for Supply Management
Even more striking, ISM reported no commodities declining in price during the September survey.
Instead, manufacturers reported increases across a broad list of inputs.
Those included:
- Aluminum
- Copper
- Steel
- Steel products
- Stainless steel
- Hot-rolled steel
- Electrical components
- Electronic components
- Memory components
- Semiconductors
- Printed circuit boards
- Diesel fuel
- Freight
- Oil-based products
- Plastics
- Resins
- Packaging materials
- Zinc
- Nickel
ISM also reported shortages involving aluminum products, copper, DRAM, electrical components, electronic components, memory, printed circuit boards, steel and tungsten products. Institute for Supply Management
That combination is significant.
Manufacturers are not simply paying more.
Some are also struggling to obtain specific materials and components.
Tariffs Are Adding Another Layer of Uncertainty
Tariffs are becoming a major part of the manufacturing cost equation.
ISM’s September report said the Prices Index was being driven by higher steel and aluminum prices, tariffs on imported goods and increases in petroleum-based products connected to the Middle East conflict. Institute for Supply Management
The uncertainty can be as disruptive as the tariff itself.
Manufacturers need to decide months in advance how much material to purchase, where to source it and how much inventory to carry.
When tariff policies can change, those decisions become harder.
An automotive supplier, for example, may hesitate to commit to a large materials order if it cannot confidently calculate the landed cost of the components several months from now.
That can delay purchasing.
It can also encourage companies to build additional inventory, which ties up cash and warehouse capacity.
ISM’s survey comments reflected that uncertainty.
The organization reported that 60% of September comments were negative, with pricing volatility, tariffs and the Iran war among the largest sources of dissatisfaction. Institute for Supply Management
The manufacturing data therefore tells two stories at once.
The first is about expansion.
The second is about uncertainty.
U.S. Manufacturing Has Stronger Demand, But Production Is Losing Momentum
The September PMI did not rise from August.
It slipped slightly from 54.6 to 54.5.
That is not a significant deterioration, but the underlying numbers reveal a more nuanced picture.
New orders accelerated.
Backlogs accelerated.
Employment accelerated.
Production slowed.
Production fell from 58.3 in August to 56.7 in September, although ISM still considers that a strong reading. Institute for Supply Management
One possible interpretation is that demand is arriving faster than some factories can comfortably process it.
Supplier deliveries remained in slower territory at 59.0.
Raw-material inventories moved back into contraction at 48.6.
Customer inventories remained unusually low at 41.6. Institute for Supply Management
That combination can create pressure throughout the manufacturing network.
Customers want products.
Backlogs are building.
Factories are producing at strong levels.
But inventories are lean and input costs are climbing.
For supply-chain managers, that is a difficult operating environment.
Expert Analysis
The September numbers suggest that the U.S. industrial economy is not suffering from a lack of demand.
It is dealing with the cost of satisfying that demand.
Reuters reported that September manufacturing activity remained stable, with demand supported by AI infrastructure investment and inventory rebuilding. At the same time, the news agency highlighted supply-chain disruptions, higher diesel prices and rising factory input costs. Reuters
This distinction is important.
A manufacturing downturn normally begins with weak orders.
That is not what the latest ISM report shows.
Instead, the New Orders Index is at 55.3 and the Backlog Index is at 56.4.
The challenge is what happens if manufacturers cannot maintain margins as input prices increase.
Companies ultimately have several choices:
- Absorb higher costs.
- Raise prices.
- Find cheaper suppliers.
- Redesign products around available materials.
- Reduce inventory.
- Delay capital spending.
- Pass additional costs to customers.
None of those options is painless.
If manufacturers absorb the costs, profits decline.
If they raise prices, inflation can remain elevated.
If they reduce purchasing, supply-chain demand weakens.
If they delay investment, future production capacity can suffer.
That is why the current U.S. manufacturing expansion deserves a closer look than the headline PMI alone suggests.
Broader Implications
The Manufacturing Recovery Is Real, But Not Comfortable
The simplest takeaway from September is that American factories are expanding.
But this is not a low-cost expansion.
The combination of a 54.5 PMI and 77.9 Prices Index shows that growth is occurring alongside significant inflationary pressure. Institute for Supply Management
That could become a problem if businesses eventually decide that higher production costs are no longer sustainable.
Steel and Aluminum Are Particularly Important
Steel and aluminum sit underneath a huge portion of American manufacturing.
They feed automotive production, machinery, construction equipment, appliances, industrial systems and countless other products.
ISM specifically identified steel and aluminum price increases as major contributors to the September inflation reading. Institute for Supply Management
Because those materials are so widespread, higher prices can spread through multiple manufacturing tiers.
A steel price increase does not necessarily stop at the steel mill.
It can eventually appear in:
- Machine components
- Vehicle parts
- Industrial equipment
- Construction products
- Consumer goods
- Packaging
- Capital equipment
That is why commodity inflation can have a much wider economic impact than the initial price increase suggests.
Electronics Are Facing Their Own Pressure
The manufacturing survey also reported shortages involving DRAM, memory, electrical components, electronic components and printed circuit boards. Institute for Supply Management
That is particularly relevant as AI infrastructure expands.
Modern factories increasingly depend on electronics.
Industrial robots require processors and sensors.
Automobiles contain enormous quantities of electronic components.
Data-center equipment requires memory, networking components and power electronics.
Manufacturing itself is becoming more dependent on the same semiconductor ecosystem that is powering the AI boom.
Tariff Uncertainty Could Change Purchasing Strategies
Tariffs can influence where companies source components.
But they can also change how much inventory companies carry.
If executives expect prices to rise, they may purchase earlier and hold more inventory.
If they expect policy uncertainty to continue, they may delay large commitments.
That can produce an unusual pattern in economic data where demand remains strong but purchasing behavior becomes less predictable.
U.S. Factories Are Hiring Again
Employment was one of the clearer positive signals in the report.
The Manufacturing Employment Index increased to 52.7 from 51.2, remaining in expansion territory for the third consecutive month. Institute for Supply Management
That suggests manufacturers are adding labor capacity even as they navigate higher costs.
It is an encouraging signal for the domestic industrial workforce.
But employment can become more difficult to sustain if elevated input prices eventually reduce profit margins.
What This Means for Supply Chains
The September report also highlights a broader transformation in the way American companies manage supply chains.
For years, many manufacturers optimized around low inventory, global sourcing and just-in-time delivery.
The pandemic demonstrated the risks of excessive dependence on fragile international supply networks.
Now tariffs, geopolitical tensions and commodity volatility are creating another reason to rethink the model.
Companies may increasingly prioritize:
Supplier diversification
Manufacturers are less likely to want a single source for critical materials.
Domestic sourcing
Buying more inputs from U.S. suppliers can reduce certain geopolitical and transportation risks, although domestic production may carry higher costs.
Strategic inventory
Instead of minimizing every inventory position, manufacturers may hold additional supplies of components that are difficult to replace.
Supply-chain visibility
Companies increasingly need real-time information about supplier capacity, freight costs, commodity prices and geopolitical developments.
Automation
Higher labor and material costs can strengthen the economic case for robotics and automated production.
The result could be a manufacturing sector that is more resilient but also more expensive.
Related History and Comparable Trends
The current manufacturing expansion follows a difficult period.
ISM says the sector spent 10 months in contraction before beginning its current nine-month expansion streak. Institute for Supply Management
The transition therefore represents a meaningful change in industrial conditions.
But today’s environment is different from a conventional manufacturing recovery.
The U.S. is simultaneously dealing with:
- AI infrastructure investment
- Reshoring
- Semiconductor expansion
- Defense manufacturing
- Energy infrastructure investment
- Tariff changes
- Higher commodity costs
- Geopolitical disruption
Those forces can pull manufacturing in opposite directions.
AI and defense can increase industrial demand.
Tariffs and material inflation can increase production costs.
Reshoring can increase domestic investment while also increasing demand for labor, electricity, machinery and raw materials.
The result is an industrial economy that can expand while becoming increasingly expensive to operate.
What Happens Next
The next few ISM reports will be important.
The first question is whether new orders continue expanding.
The second is whether production can maintain its current pace.
The third is whether the Prices Index remains near the elevated September level.
A sustained Prices Index around the upper 70s would suggest that manufacturers are dealing with significant inflationary pressure.
Inventory trends will also deserve attention.
Raw-material inventories contracted in September, while customer inventories remained too low. Institute for Supply Management
If demand remains strong, those conditions could support additional production.
But if input shortages worsen, manufacturers could find themselves with strong orders but insufficient materials to fulfill them.
That would create a very different kind of supply-chain problem.
The biggest question for the rest of 2026 is therefore not simply whether American manufacturing grows.
It is whether factories can maintain that growth without allowing material costs and supply-chain uncertainty to overwhelm their margins.
Conclusion
The latest U.S. manufacturing numbers deliver a surprisingly resilient picture of America’s industrial economy.
Factories expanded for the ninth consecutive month.
New orders increased.
Backlogs accelerated.
Employment strengthened.
Production remained solid.
But underneath that strength is a warning sign.
The ISM Prices Index surged to 77.9, raw-material prices increased for the 24th consecutive month, and manufacturers reported higher costs across steel, aluminum, copper, electronics, semiconductors, fuel and freight. Institute for Supply Management
Tariffs and geopolitical uncertainty are making purchasing decisions harder at the same time.
That creates a manufacturing recovery with an important caveat.
America’s factories are growing, but the cost of growth is rising.
Whether the expansion becomes a durable industrial renaissance or runs into another period of margin pressure will depend heavily on what happens next with tariffs, commodity prices, inventories, supply chains and business investment.
For companies operating in the U.S. industrial economy, the message is clear: demand is back, but cheap and predictable inputs are becoming much harder to take for granted.
FAQ
1. Is U.S. manufacturing expanding?
Yes. U.S. manufacturing expanded for the ninth consecutive month in September 2026, according to ISM. The Manufacturing PMI registered 54.5, remaining well above the 50 threshold associated with expansion. Institute for Supply Management
2. What is the U.S. manufacturing PMI for September 2026?
The September 2026 ISM Manufacturing PMI was 54.5, compared with 54.6 in August. Institute for Supply Management
3. Why are manufacturing costs rising?
Manufacturers reported higher prices for steel, aluminum, copper, electronic components, memory, semiconductors, diesel, freight, plastics and other materials. ISM also pointed to tariffs and higher petroleum-related costs as contributors. Institute for Supply Management
4. What is the ISM Prices Index?
The ISM Prices Index measures the direction of prices paid by manufacturers. It reached 77.9 in September, up from 71.1 in August. ISM reported that raw-material prices had increased for 24 consecutive months. Institute for Supply Management
5. Are U.S. manufacturing jobs increasing?
The ISM Manufacturing Employment Index rose from 51.2 in August to 52.7 in September, remaining in expansion territory for the third consecutive month. Institute for Supply Management
6. Are tariffs hurting U.S. manufacturers?
Tariffs are contributing to cost and planning uncertainty. ISM’s September survey cited tariffs as one of the factors affecting prices and business sentiment, alongside geopolitical and energy-related pressures. Institute for Supply Management
7. Which manufacturing materials are in short supply?
ISM reported shortages involving aluminum products, copper, DRAM, electrical components, electronic components, memory, printed circuit boards, steel and tungsten products. Institute for Supply Management
8. What should manufacturers watch next?
Manufacturers should watch new orders, production, employment, inventories, commodity prices, tariffs and supplier deliveries. The most important signal may be whether strong demand can continue while the Prices Index remains elevated.
Sources & References
- Institute for Supply Management, “September 2026 ISM Manufacturing PMI Report.” The primary source for the 54.5 PMI, new orders, production, employment, prices, inventories and commodity shortages. Institute for Supply Management
Read the full ISM report - Reuters, “US manufacturing steady in September, input prices increase.” Reporting on the September manufacturing data, AI infrastructure demand, input-price pressures and supply-chain conditions. Reuters
Read the Reuters report - Institute for Supply Management, “ISM PMI Reports Roundup: September Manufacturing.” Additional analysis of tariffs, pricing volatility, manufacturer sentiment and geopolitical pressures. Institute for Supply Management
Read the ISM analysis - Institute for Supply Management, “August 2026 ISM Manufacturing PMI Report.” Provides the previous month’s baseline for comparison with September’s manufacturing expansion. Institute for Supply Management
Read the August ISM report
