U.S. supply chains are entering October under renewed pressure as manufacturers report higher prices for steel, aluminum, copper, fuel and freight while critical components such as memory, electrical equipment, printed circuit boards and tungsten remain in short supply.
The latest Institute for Supply Management report paints a complicated picture. U.S. manufacturing expanded for a ninth consecutive month in September, with the Manufacturing PMI at 54.5, but the Prices Index jumped to 77.9, its highest level since March. ISM also recorded shortages across several important industrial and electronics categories.
For businesses that depend on reliable materials, the problem is no longer simply whether products can be sourced. The bigger question is increasingly how much they will cost and how long suppliers will take to deliver them.
Background and Context
Supply chains have spent much of the past several years adjusting to disruptions involving transportation, raw materials, labor, geopolitics and changing trade conditions.
The latest ISM data suggests that some of those pressures are resurfacing in a different form.
The U.S. manufacturing sector itself remains in expansion. New orders rose to 55.3 in September, production remained at 56.7 and employment increased to 52.7. Backlogs also jumped to 56.4.
That means demand has not disappeared.
Instead, manufacturers are dealing with an increasingly difficult combination of strong demand, rising input prices and shortages of selected components.
This distinction matters for companies operating complex supply chains.
When demand is weak, businesses can often tolerate a temporary shortage because customers are ordering less.
When demand is strong, however, shortages can become more disruptive. Manufacturers may have to pay more to secure materials, carry additional safety stock or search for alternative suppliers.
Latest Update: U.S. Supply Chains Face a New Cost Squeeze
The September ISM report provides one of the clearest snapshots yet of the current pressure on U.S. supply chains.
The Manufacturing PMI stood at 54.5, showing continued expansion. But the Prices Index climbed 6.8 points to 77.9. ISM said raw-material prices had increased for the 24th consecutive month.
At the same time, supplier deliveries remained slow, with the Supplier Deliveries Index at 59.0.
Here is how several key supply-chain indicators changed:
| Indicator | September 2026 | August 2026 | Change |
|---|---|---|---|
| Manufacturing PMI | 54.5 | 54.6 | -0.1 |
| New Orders | 55.3 | 53.7 | +1.6 |
| Production | 56.7 | 58.3 | -1.6 |
| Employment | 52.7 | 51.2 | +1.5 |
| Supplier Deliveries | 59.0 | 59.3 | -0.3 |
| Inventories | 48.6 | 50.6 | -2.0 |
| Backlog of Orders | 56.4 | 51.8 | +4.6 |
| Prices | 77.9 | 71.1 | +6.8 |
| Customers’ Inventories | 41.6 | 42.8 | -1.2 |
Source: Institute for Supply Management.
The numbers show why supply-chain managers have reason to remain cautious.
Demand is growing, but inventories inside manufacturers are contracting. Customer inventories are also considered too low by the ISM measure.
That can leave companies with less room to absorb another disruption.
Which Materials Are Becoming More Expensive?
ISM respondents reported higher prices across a wide range of commodities and components.
The September list included:
- Aluminum
- Brass products
- Copper
- Copper products
- Corrugated products
- Diesel fuel
- Electrical components
- Electronic components
- Freight
- Fuel
- Memory components
- Nickel
- Oil-based products
- Packaging materials
- Plastic-based products
- Printed circuit boards
- Resins
- Semiconductors
- Steel
- Hot-rolled steel
- Stainless steel
- Steel products
- Zinc
Importantly, ISM reported no commodities as being down in price in September.
That broad-based movement is significant.
The pressure isn’t isolated to one raw material. It covers metals, energy, electronics, transportation and packaging.
For manufacturers, those inputs often sit at different stages of the same production process.
A higher steel price affects the physical structure of a product.
Higher semiconductor and electronic-component prices affect the control systems.
Higher fuel and freight costs affect the movement of both raw materials and finished goods.
The result can be cumulative.
Critical Components Are Also in Short Supply
Price increases are only half of the story.
ISM reported shortages involving:
- Aluminum products
- Copper
- Dynamic random-access memory, or DRAM
- Electrical components
- Electronic components
- Memory
- Printed circuit boards
- Steel
- Hot-rolled steel
- Steel products
- Tungsten products
Several of these shortages have persisted for multiple months. Electrical components, for example, were listed as being in short supply for 15 consecutive months, while electronic components were listed for 19 months.
That is particularly relevant for electronics manufacturers, industrial equipment producers and companies building AI infrastructure.
Electronics Supply Chains Under Pressure
The electronics side of the supply chain deserves particular attention.
Electrical components, electronic components, memory, PCBs and semiconductors all appear in the September report as either higher-priced inputs, shortage categories or both.
This matters because electronic components can have long and highly specialized production cycles.
A shortage of a relatively small component can delay the completion of a much larger product.
For example, a manufacturer might have sufficient steel, plastic and labor to assemble a machine but still be unable to ship it because a required control board is unavailable.
That is one reason component shortages can have an economic impact far beyond the dollar value of the missing part.
AI Demand Is Adding Another Layer
One of the most interesting forces behind current supply-chain demand is the expansion of artificial intelligence infrastructure.
Reuters reported that U.S. manufacturing activity in September continued to benefit from demand associated with AI infrastructure development and inventory rebuilding.
AI data centers require large quantities of:
- Advanced processors
- High-bandwidth memory
- Printed circuit boards
- Power equipment
- Electrical components
- Cooling equipment
- Networking hardware
- Steel and other construction materials
This creates additional demand across multiple industrial supply chains.
The effect can be especially pronounced for components that already have limited production capacity.
Micron, for example, recently reported strong demand for AI-related memory and said customer commitments had increased significantly, highlighting the continuing strength of the memory market.
That does not mean every shortage is caused by AI.
It does mean AI infrastructure has become an important source of demand for several critical technology components.
Freight and Fuel Costs Add More Pressure
Raw materials are only part of the supply-chain equation.
ISM also reported higher prices for freight, fuel and diesel in September.
For manufacturers, transportation costs affect almost every stage of the process.
Materials have to move from suppliers to factories.
Components may cross borders multiple times.
Finished goods then move from factories to warehouses, retailers or customers.
Higher diesel and freight costs therefore have the potential to increase the landed cost of products even when the underlying material price remains unchanged.
This is particularly important for businesses operating long or geographically dispersed supply chains.
Why Steel and Aluminum Matter So Much
Steel and aluminum appear repeatedly in the latest supply-chain data because they are foundational industrial materials.
They are used in:
- Automobiles
- Machinery
- Construction equipment
- Appliances
- Aerospace
- Packaging
- Energy infrastructure
- Industrial facilities
- Transportation equipment
When steel or aluminum prices rise, the impact can spread across multiple industries.
ISM specifically attributed part of the September Prices Index increase to higher steel and aluminum prices, alongside tariffs on imported goods and higher petroleum-based product costs connected with the Middle East conflict.
The result is an input-cost environment in which companies have to make decisions about pricing, inventory and sourcing at the same time.
Expert Insights and Analysis
The September data reveals a supply chain that is functioning, but not necessarily operating comfortably.
That distinction is important.
The U.S. manufacturing sector is growing. New orders increased for the ninth consecutive month, while backlogs expanded significantly.
Yet the system is showing several warning signals:
Prices are rising.
The Prices Index reached 77.9.
Inventories are falling.
The Manufacturing Inventories Index declined to 48.6.
Customer inventories remain low.
The Customers’ Inventories Index was 41.6, its 24th consecutive month at a “too low” level.
Supplier deliveries remain slow.
The Supplier Deliveries Index was 59.0.
Component shortages persist.
Electrical and electronic components, memory, PCBs and metals remain among the reported shortages.
Put together, these indicators suggest that businesses have less room for error.
A manufacturer operating with high inventories can sometimes absorb a supplier delay.
A manufacturer with low inventories and growing orders has far less flexibility.
What This Means for U.S. Manufacturers
The immediate impact will differ by industry.
Automotive
Automakers depend heavily on steel, aluminum, semiconductors, electrical components and increasingly sophisticated electronic systems.
A shortage of one component can interrupt an entire production line.
Recent events have already demonstrated this vulnerability. Ford temporarily halted F-150 production at its Michigan facility in September because of a supply issue, according to Reuters.
Electronics
Electronics manufacturers face exposure to memory, PCBs, semiconductors and electrical components.
Strong AI demand can increase competition for some of those inputs.
Machinery
Machinery manufacturers are exposed to steel, copper, electronic components, motors, electrical equipment and freight.
Higher input costs can make equipment more expensive to produce even when order volumes remain strong.
Aerospace
Aerospace manufacturers operate complex supplier networks where specialized components can have long lead times.
Even small disruptions can affect production schedules.
Consumer Products
Consumer-goods companies face another layer of pressure because packaging, plastics, metals, freight and fuel all influence final product costs.
Broader Implications for U.S. Supply Chains
The latest data suggests that supply-chain resilience is increasingly becoming a question of cost as well as availability.
During earlier disruptions, businesses often focused on whether a component could be obtained.
Today, procurement teams may need to ask additional questions:
- Can the component be sourced at an acceptable price?
- How long will the supplier take to deliver it?
- Is there a second supplier?
- Can the component be redesigned?
- Should inventory levels be increased?
- Can production be moved closer to customers?
- How much transportation cost can the company absorb?
These questions can reshape corporate supply-chain strategies.
Companies may decide to diversify suppliers, increase safety stock, establish regional production or sign longer-term contracts for critical materials.
But each solution comes with a cost.
Holding more inventory requires more working capital.
Adding suppliers increases management complexity.
Regionalizing production can require major capital investment.
Long-term contracts can reduce price uncertainty but may limit flexibility.
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Related History and Comparable Supply-Chain Disruptions
The current situation has similarities to the supply-chain disruptions that affected manufacturers earlier in the decade, but the underlying environment is different.
During the pandemic-era disruptions, companies faced factory shutdowns, container shortages, port congestion and severe transportation bottlenecks.
The current pressure is more fragmented.
Manufacturers are reporting shortages in specific categories while transportation, energy and commodity prices are also rising.
That creates a more targeted supply-chain problem.
The September ISM report shows that supplier delivery times remain slower, but the biggest pressure is increasingly visible in input prices and specific component shortages rather than a universal breakdown in transportation.
The distinction matters because companies can respond differently to a targeted shortage than to a system-wide logistics shutdown.
What Happens Next?
The next few months will show whether the September increase in supply-chain costs represents a temporary spike or a more persistent trend.
Several indicators deserve close attention.
Commodity Prices
Steel, aluminum, copper and petroleum-related products will remain important indicators for manufacturers.
Electronics Availability
Memory, semiconductors, PCBs and electrical components could become increasingly important as AI infrastructure investment continues.
Freight Costs
Higher diesel and fuel prices can feed into transportation expenses across domestic and international logistics networks.
Inventories
Low customer and manufacturer inventories could amplify the impact of future disruptions.
New Orders
Strong demand can support manufacturing expansion, but it can also increase competition for constrained components.
Supplier Deliveries
If delivery times continue to lengthen, companies may have to increase safety stock or identify alternative suppliers.
The Bigger Supply-Chain Question
The central issue for U.S. supply chains is no longer simply whether American manufacturers can produce more.
The September data indicates that they can.
The more difficult question is whether they can scale production without allowing shortages and higher input costs to undermine that growth.
The manufacturing PMI remained above 50.
New orders increased.
Backlogs increased.
Employment increased.
But prices increased even faster.
That creates a delicate balance.
If demand stays strong, suppliers have an incentive to expand capacity.
If component shortages persist, manufacturers may continue paying premiums.
If freight and fuel costs remain elevated, transportation expenses can add another layer.
And if companies pass those costs through to customers, supply-chain inflation can eventually become a broader pricing issue.
Conclusion
U.S. supply chains are under pressure, but they are not showing signs of a broad-based breakdown.
The September ISM data instead points to a more complicated environment: manufacturing is expanding while critical inputs are becoming more expensive and selected components remain difficult to source.
Aluminum, copper, steel, electrical components, electronic components, memory, PCBs and tungsten were among the items reported in short supply.
At the same time, freight, fuel, steel, aluminum, semiconductors and other inputs were reported at higher prices.
For manufacturers and supply-chain managers, the message is straightforward.
Demand is providing an opportunity for growth, but cost control and sourcing resilience are becoming just as important as production capacity.
The companies best positioned for the next phase may be those capable of balancing inventory, supplier diversification, transportation costs and material availability without losing the ability to respond quickly when demand changes.
FAQ
Why are U.S. supply chains under pressure?
U.S. supply chains are facing a combination of higher material, freight and fuel prices, along with shortages involving selected metals, electronics and industrial components. ISM reported higher prices for numerous inputs and shortages involving aluminum products, copper, electrical components, memory, PCBs, steel and tungsten in September.
Which materials are in short supply in the U.S. supply chains?
ISM reported shortages involving aluminum products, copper, DRAM, electrical components, electronic components, memory, printed circuit boards, steel, hot-rolled steel, steel products and tungsten products.
Are steel and aluminum prices rising?
Yes. ISM reported higher prices for aluminum, steel, hot-rolled steel, stainless steel and other steel products in September. The organization identified steel and aluminum prices as contributors to the elevated Prices Index.
Why are electronics components important to U.S. supply chains?
Electronic components, memory, semiconductors and PCBs are used across automobiles, industrial equipment, consumer electronics, data centers and AI infrastructure. A shortage of a relatively small component can delay production of a much larger finished product.
Are freight costs increasing?
ISM respondents reported higher prices for freight, fuel and diesel in September.
Is U.S. manufacturing still expanding?
Yes. The U.S. Manufacturing PMI was 54.5 in September, marking the ninth consecutive month of expansion. New orders, production, employment and backlogs were also in expansion territory.
What can companies do about supply-chain shortages?
Companies can diversify suppliers, maintain strategic safety stock, redesign products where practical, negotiate longer-term supply agreements, regionalize selected production and improve visibility into supplier inventories and lead times.
SOURCES & REFERENCES
- September 2026 ISM Manufacturing PMI Report, Institute for Supply Management
Read the official ISM report - U.S. manufacturing steady in September, input prices increase, Reuters
Read the Reuters report - August 2026 ISM Manufacturing PMI Report, Institute for Supply Management
Read the August ISM report - Micron’s AI-fueled revenue forecast blows past estimates, backlog swells, Reuters
Read the Reuters analysis
