Stacked Costs: How Energy, Metals, and Tariffs Compound Supply Chain Inflation
Written by Aji Venkatesh (Research Lead), Rohan Jain (Research Lead), Parker Woodwyk, Shreyas Rao, Manav Vengilatt, William Streets
EXECUTIVE SUMMARY:
Energy shocks from Iran and Russia bleed into companies on the operational outflow side, seen through record diesel and freight surcharges alongside soaring raw material costs for resins and base oils.
The data center buildout continues to run faster than global mining capacity; it points to long-term inflation across key industrial metals like copper, silver, and aluminum.
Low- and middle-income families face severe headwinds as the cost of everyday essentials—from groceries to housing—continues to outpace wages, pushing the "American Dream" further out of reach.
A costly duality: Policy-driven tariffs multiply current market inflation by taxing imported goods on their higher base costs, penalizing companies twice at the border.
Introduction
Inflation has entered a structural phase. While previous cycles were headlined by broad monetary stimulus and sudden post-pandemic consumer rebounds, current price increases are tied directly to supply-side bottlenecks. In the modern day, inflation can no longer be defined by a singular metric; instead, it is driven by physical commodities, critical infrastructure demands, and national trade barriers. As operational costs outpace short-term fixes, companies and consumers face compounding pressure across volatile energy spikes, AI-driven industrial metals, rising household essentials, and policy-layered customs duties.
Geopolitical Energy Shocks
Energy prices have risen faster than any other category this year, and diesel has been hit hardest. U.S. on-highway diesel averaged $6.529 per gallon in the week of September 21, 2026, up from $3.749 a year earlier (EIA). That was the highest price in the EIA’s 32 years of tracking diesel, and the gap between diesel and gasoline reached about $1.97 a gallon, the widest on record (EIA). A gap that large points to a shortage of diesel specifically, not just expensive crude oil. The EIA links the shortage to reduced diesel supplies from the Middle East, Russia, and China (EIA). Russia made the problem worse. It banned diesel exports in July after Ukrainian drone attacks on its refineries caused fuel shortages at home, and it is the world’s second-largest diesel exporter (Reuters, ING).
Higher diesel prices reach businesses first through shipping costs, but who pays depends on how freight is priced. On contract freight, shippers absorb most of the increase through higher rates, while on spot freight priced as a single all-in rate, trucking companies absorb it through lower profits (CCJ). Package shipping is not spared either. UPS charged a 21.75% fuel surcharge on ground shipments in January, and by late August that had climbed to 27.25% (UPS). Clorox expects more than $200 million in inflation this year, about twice its normal range, and named logistics as one of the causes (Supply Chain Dive). However, this cost moves with the price of fuel, and diesel had already fallen back to $6.179 by October 12 (EIA).
Input costs tell a different story. The Middle East supplied over 40% of the world’s polyethylene exports in 2025, and the closure of the Strait of Hormuz has cut much of that supply off (SunSirs). North American polyethylene prices rose about 25% to 30% from a year earlier by March (Plastics Today). Those costs are reaching store shelves. Clorox is raising prices on products like Glad trash bags, which are made from polyethylene (Supply Chain Dive), and Emerald Packaging raised its prices about 8%, its largest monthly increase ever (Packaging Dive). Motor oil is under similar pressure. U.S. prices for Group III base oil, the main ingredient in synthetic motor oil, rose 235%, from $3.40 to $11.40 per gallon between January and July (Herald Corp). The main cause was missile damage to Shell’s Pearl plant in Qatar, which will take a year to repair (Argus), and industry analysts expect the market to stay short of supply through 2027 (Axios). Unlike diesel, these costs depend on damaged plants and blocked shipping routes, not the daily price of oil, so they are not likely to fall when crude does.
Electricity is one essential that has largely escaped the shock. While natural gas prices in Europe and Asia jumped after the strait closed, the U.S. benchmark price fell 9%, because American export terminals were already running near full capacity and domestic supply was plentiful (EIA). Overall, the energy shock reaches prices in two ways. Shipping costs will ease as fuel prices fall, but higher input costs for plastics and motor oil are likely to stay well after energy prices cool.
Metal Commodity Prices
The accelerated adoption of artificial intelligence is driving a massive expansion in physical infrastructure. Ai is often discussed just regarding chips and other components directly responsible for computing power, but these technological systems also require enormous amounts of physical infrastructure. Data centers need electrical networks, cooling systems, backup power, and other equipment to operate. This surge in demand for computing hardware and supporting infrastructure is creating additional price pressures across multiple industrial metals including copper, silver, and aluminum. As AI investment continues to expand, an important question emerges: To what extent is the expansion of AI and data centers contributing to inflation, and could these effects persist as investment continues to grow?
Copper provides one of the clearest examples of how AI’s physical expansion can translate into commodity price pressures. Copper is highly conductive, durable, and recyclable, making it an essential material for electrical infrastructure. Data centers require copper for their power distribution network, circuit boards, wiring, and cooling systems (blog.copper) As computing capacity expands, demand for the materials needed to construct and operate these facilities increases. Some estimates suggest that Ai data centers require nearly 3 times as much copper as traditional data centers or roughly 50,000 tons worth per location (avivametals).
The AI industry's importance regarding copper is particularly significant when considered with its recent price increases. Data from the Federal Reserve Bank of St. Louis’s data base shows how copper has taken a drastic 43.3% increase in price over the past 5 years. Although this increase does reflect multiple sources beside AI data center investment, rising copper prices can increase the cost of electrical equipment, power-grid expansion, and data-center construction. As investment in AI infrastructure continues to grow, additional demand for copper could further contribute to these existing cost pressures.
Silver provides another example of how technological expansion can influence commodity markets, although its price movements are a bit more intricate than copper’s. Silver is valued not only as an investment asset, but also for its applications in electronics and electrical equipment. Silver is the world’s best metal conductor of electricity, making it an extremely useful component that supports modern computing (samaterials). However, silver’s investment demand also influences its price, making it difficult to attribute price increases exclusively to technological advancement. According to the Silver Institute, silver demand reached a record peak of 680.5 million ounces, jumping up 4% from the previous year. However, in 2025 this demand dropped 3% in part due to declines from solar technology outweighing increases from the AI sector. This demonstrates that although AI infrastructure may contribute to additional silver demand, its overall effect on prices depends on developments across other industries as well. If AI demands continue increasing at their current rate, while silver supplies remain as limited as they are, silver products could see additional upward price pressures.
Inflation Daily Essentials
Consumer prices rose 3.4% over the 12 months ending in August, but that headline number hides a large gap between categories (BLS). Energy prices jumped 16.3% over the same period, with gasoline alone up 27.4%, while prices excluding food and energy rose only 2.4%. Because oil has driven so much of the headline increase, it is easy to assume that inflation will cool once the conflict in the Middle East settles down. However, the costs that households cannot avoid, like housing, food, and water, are being pushed up by slower, structural forces such as housing shortages, a shrinking cattle herd, and aging water infrastructure. These pressures are not directly tied to the price of oil, which means they are likely to remain even after energy prices stabilize.
Housing is the largest of these costs, making up about 35% of the Consumer Price Index, and shelter prices rose 3.0% over the last year (BLS). The bigger problem is how far housing costs have pulled away from incomes. The income needed to afford a median-priced home reached $120,800 at the end of 2025, up from $68,700 in 2020, and the total monthly cost of owning that home, including insurance and property taxes, is now about $3,120 (Harvard JCHS). The median home now costs nearly five times the median household income, compared with an average of 3.2 times during the 1990s (Enterprise Community Partners). Renters are not escaping the pressure either. Rents in early 2026 were 29% higher than in 2020, and only 23% of homes listed for sale in March 2026 were affordable to households earning $75,000 or less, down from 49% in 2019 (Novogradac). For the 13 million renter households earning under $30,000 a year, the median amount left over after paying for housing is just $210 a month for everything else (The MortgagePoint).
Food prices tell a similar story. Grocery prices rose 2.2% over the year, and restaurant prices rose 3.4%, but some staples have climbed much faster: beef prices are up 5.9%, and ground beef is up 7.2% (BLS). Ground beef hit a record $6.90 per pound in April, nearly a dollar more than a year earlier (Fortune). The main cause for this is a lack of supply. The U.S. cattle herd has fallen to a 75-year low after drought in the West forced ranchers to shrink their herds, and the U.S. also halted cattle imports from Mexico to keep out the New World screwworm parasite (The Cattle Site). Rebuilding the herd will be slow, since ranchers have to keep young female cattle for breeding instead of selling them for beef. The Middle East conflict adds further pressure to the market because higher fertilizer prices raise the cost of corn and cattle feed, which could keep food prices elevated into next year. The USDA expects overall food prices to rise 3.1% in 2026, with grocery prices up 2.7% (USDA).
Water is one of the least discussed examples of rising essential costs. Combined household water and sewer bills rose 5.1% in 2025, the largest annual increase in five years and faster than overall inflation, with water rates up 6.0% and sewer rates up 4.8% (Bluefield Research). Covering an average monthly water and sewer bill now takes about 11.5 hours of work at minimum wage. Unlike gas prices, these increases come from aging pipes, rising operating costs, and stricter regulations, so many utilities are raising rates on multi-year schedules. In La Verne, California, for example, water rates rose 35% in January 2026 and another 25% in July, with more increases planned through 2029 (City of La Verne).
Not every essential is getting more expensive. Prescription drug prices fell 3.1% over the 12 months ending in July, the steepest annual drop in more than 60 years (Becker's Hospital Review), although economists disagree on how much of that comes from new federal pricing deals versus Medicare price negotiations and generic competition (eMarketer). Overall, while oil explains most of the jump in headline inflation, the everyday costs of housing, food, and water are being driven by long-term supply problems that will not reverse when the conflict ends, which means these costs are likely to stay elevated well after energy prices cool.
Tariffs & HTS Codes
Customers are increasingly prioritizing environmental sustainability in their purchasing decisions, with 68% willing to pay more for eco-friendly options. However, this trust is weakened by greenwashing scandals and vague claims, with 78% of consumers expressing distrust in eco labels (JournalCP). Together, this highlights a significant demand gap in sustainable products. Most consumers lack even the most basic understanding of how a company's supply chain operations; such as sourcing, logistics, and manufacturing impact and degrade the environment, making it difficult for consumers to fully realize the impact of the products they purchase. Furthermore, greenwashing preys upon consumer psychology deliberately misleading and even tricking customers.
Market Inflation vs. Policy-Layered Duties
When analyzing supply chain cost pressures, it's critical to separate market-driven commodity inflation from policy-driven duty inflation. They operate on fundamentally different mechanics:
Market-Driven Commodity & Logistics Inflation: Reflects changes in raw material availability, labor, energy, and freight demand. In producer price data, this shifts baseline product costs (FOB pricing) and shipping rates. For example, the rise in the Producer Price Index (PPI) for bare printed circuit board manufacturing rose from $171.630 in April 2026 to $212.806 in August 2026, and resin and plastics manufacturing reached $360.445 in May 2026. Ocean container spot freight rates hit $4,434 per 40ft container globally in October 2026 – nearly a 94% from the beginning of April 2026 (and up to $10,428/FEU on Shanghai - New York routes).
Policy-Layered Tariff Inflation: Tariffs (such as Section 301 duties) are external taxes imposed by trade policy. They do not replace or absorb commodity inflation but are stacked directly on top of the Customs entered value (FOB price).
The Compounding Effect
Customs Duty ($) = (Base Cost + Material Inflation) x Tariff Rate (%)
Policy duties compound underlying material inflation as importers are taxed not just on the original good, but on the inflationary price itself.
Key HTS Codes and Underlying Producer Price Benchmarks
To ground this in specific component categories, trade compliance and procurement teams classify these goods under standard Harmonized Tariff Schedule (HTS) headings, which map to industry Producer Price Indexes:
Conclusion
Structural inflation magnifies the current state of supply chain bottlenecks, postponing key stabilizers in prices and restoring purchasing power. Instead of solving root operational imbalances, relying on temporary fixes—such as absorbing energy surcharges, passing through metal price spikes, and managing compounding pressures on daily essentials—merely moves sustainable recovery further away.
Two independent shocks are happening simultaneously, plaguing the economic landscape for the foreseeable future. This is far harder to diagnose than typical inflation because these disruptions share no root cause; their coincidence in timing is the real issue. While political conflicts around the world create stress on energy and petrochemicals, another increase in demand is putting pressure on tech hardware and important metals.
Moving ahead, this split in the market is changing how supply chains are planned:
Separate shipping rates from raw material costs: SCM forecasting must not assume that lower diesel or freight costs will automatically lower input costs for plastics, base oils, or electronics.
Track the compounding tariff penalty: Procurement teams must see that when underlying material costs spike, percentage-based border duties rise too, effectively taxing inflation itself.
Rethink lean inventory: Companies can no longer operate with zero buffer stock; holding extra inventory increases carrying costs, but running out of long-lead critical parts causes far more costly operational shutdowns.
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