High US diesel prices put retailers and consumers under pressure

US diesel prices have risen above $6 a gallon, pushing up freight and delivery costs for retailers and increasing the risk of higher prices for consumers as fuel supplies remain tight.

High US diesel prices are putting fresh pressure on retail supply chains and increasing the cost of moving food and consumer goods across the country.

The US Energy Information Administration (EIA) put the average US on-highway diesel price at $5.967 a gallon for the week ending 7 September. GasBuddy subsequently reported that the national average had passed $6 a gallon for the first time, reaching $6.06 on 11 September.

For retailers, the increase matters because diesel remains central to the movement of goods between ports, manufacturers, distribution centres, stores and consumers.

A prolonged price surge could push up freight rates and fuel surcharges, forcing retailers and suppliers to decide how much of the additional cost they can absorb and how much they pass on to shoppers.

The issue extends beyond the US. International retailers selling into the American market can face higher domestic distribution costs, while the global supply disruption behind the diesel surge is affecting energy and transport markets more widely.

Freight costs rise

Road freight remains central to US retail distribution, particularly for long-distance transport and deliveries from distribution centres to stores.

Higher diesel prices increase operating costs for trucking companies, which can respond by raising freight rates or imposing fuel surcharges on customers.

Such charges are an established feature of the US transport market. As fuel costs rise, carriers can adjust surcharges more quickly than retailers can renegotiate longer-term logistics contracts.

The impact varies between businesses. Some retailers may have temporary protection through existing freight agreements, while others could face higher charges more quickly.

The longer diesel remains expensive, the harder it becomes for retailers, suppliers and logistics companies to absorb the increase without affecting margins or prices.

Grocery supply chains face pressure

Food retailers are particularly exposed because much of the grocery supply chain depends on road transport.

Meat, dairy products, fruit, vegetables and other perishables often require refrigerated trucks. Tight delivery schedules also give supermarkets and suppliers less flexibility to delay shipments or change transport methods.

Diesel costs can affect food before it reaches the road. The fuel is widely used in agricultural machinery as well as in transporting produce from farms to processors and distribution centres.

The timing of the current increase is significant for US agriculture because the autumn harvest creates additional seasonal demand for diesel.

Higher diesel prices do not translate directly into equivalent increases in grocery prices. Retailers, suppliers and logistics companies can absorb some costs through margins, contracts and efficiency measures.

If elevated prices persist, however, higher distribution costs are more likely to feed through to food prices as contracts are renewed and fuel surcharges increase.

E-commerce delivery costs increase

The diesel surge also presents a challenge for e-commerce and home delivery.

Online retail depends on extensive logistics networks to move individual orders from warehouses and fulfilment centres to customers. Higher fuel prices increase the cost of operating those networks, particularly for lower-value orders.

Retailers offering free or low-cost delivery are particularly exposed because transport can account for a significant share of fulfilment costs.

Businesses can respond by absorbing some of the increase, passing costs to shoppers or finding efficiencies in their fulfilment networks. They could also review free-delivery thresholds, consolidate shipments or encourage customers to place fewer, larger orders.

The challenge is that consumers have become accustomed to fast and inexpensive delivery. Retailers must therefore balance rising fulfilment costs against customer expectations and competitive pricing.

Bulky goods face greater exposure

Furniture, large appliances, building materials and other bulky products are also vulnerable to higher diesel costs.

Their size and weight require more freight capacity than many smaller consumer products, making transport a relatively important part of their overall cost.

For retailers, this creates a difficult choice when fuel prices rise. Absorbing higher freight costs puts pressure on margins, while increasing product or delivery prices could weaken demand.

The impact can be particularly significant for goods travelling long distances between manufacturers, warehouses and consumers.

Retail prices could react later

The impact of high US diesel prices may take time to become fully visible at the checkout.

Many retailers do not buy freight at the daily market price. Contracts negotiated in advance can provide temporary protection from sudden fuel movements, while suppliers and retailers can absorb some increases through their margins.

Fuel surcharges can shorten that delay by allowing transport companies to adjust what they charge customers as diesel prices change.

If elevated prices persist, retailers are likely to encounter higher logistics costs as contracts are renewed and surcharges increase.

This means the duration of the diesel surge could be more important for retail prices than the initial spike itself.

The increase is also taking place against a wider inflationary backdrop. US consumer prices rose 3.4% in the year to August, according to government data reported by Reuters, adding to pressure on household budgets.

Why diesel prices are rising

The price increase reflects pressure on global crude oil and refined fuel supplies.

The conflict involving the US and Iran has disrupted energy markets and shipping around the Strait of Hormuz, a critical route for global oil supplies. Ukrainian attacks on Russian refineries and restrictions on fuel exports have added pressure to refined fuel markets.

Brent crude settled at $104.61 a barrel on 11 September, while US West Texas Intermediate crude ended at $100.05, according to Reuters.

US diesel supplies are also tight. Reuters reported that domestic diesel inventories were 13% below their five-year average in early September.

The EIA expects pressure on stocks to continue. Its September Short-Term Energy Outlook forecast US distillate fuel inventories, which include diesel, to fall below 100 million barrels during September.

The agency expects inventories to remain below the 2021–25 five-year low through the end of 2026 and for most of 2027.

That does not mean diesel prices will remain at current levels. Oil and refined fuel markets can move rapidly as supply, demand and geopolitical conditions change.

However, tight inventories leave the market more exposed to further disruption, increasing uncertainty for fuel-intensive retailers and logistics operators.

Regional prices diverge

Cost pressures vary considerably across the US.

EIA data for the week ending 7 September put the average US on-highway diesel price at $5.967 a gallon, up from $5.599 a week earlier.

The West Coast average was considerably higher at $6.987 a gallon.

Differences in refinery access, fuel specifications, taxes and transport infrastructure mean retailers in some parts of the country face greater fuel exposure than others.

For national retail supply chains, however, the impact is more complicated. Products can cross several states on their journey from ports and factories to distribution centres and stores, meaning higher fuel costs in one region can affect businesses elsewhere.

Retailers seek transport savings

Retailers and logistics operators are looking for ways to limit their exposure to higher fuel costs.

Freight operators can consolidate loads, optimise routes and reduce empty journeys. Retailers can review delivery schedules and combine shipments to reduce the number of journeys required to move inventory through their networks.

Rail provides another option for some types of retail freight. Trains can move large volumes more efficiently than road transport, making rail suitable for heavy or less time-sensitive goods.

It cannot replace trucks across the retail supply chain. Rail operates on fixed routes and schedules, while road transport remains essential for many journeys between terminals, distribution centres, stores and homes.

Air freight offers greater speed but comes at a much higher cost and is also exposed to fuel-price movements. Retailers are therefore more likely to use it for urgent, high-value or time-sensitive inventory.

Alternative fuels, including renewable diesel and biodiesel, offer another option for some fleet operators. However, availability, infrastructure and costs vary between markets, limiting their ability to provide an immediate solution across the US.

Global retailers face wider effects

For international retailers, the US diesel surge shows how an energy shock can spread through retail supply chains.

Companies selling into the US can face higher distribution costs once imports arrive at ports and enter domestic freight networks. Businesses sourcing American products or components can also encounter higher logistics costs further up the supply chain.

The underlying pressures are international. Disruption to crude oil flows and refining capacity affects global fuel markets, while higher shipping and transport costs can influence supply chains far beyond the country where a fuel price increase first appears.

The Port of Los Angeles has said retailers brought forward imports during the summer partly because of concerns about higher fuel costs and tariffs. The port recorded its busiest three-month period on record from June to August.

For retailers, the key question is how long diesel prices remain elevated.

A short-lived increase can be managed through existing contracts, margins and operational changes. A prolonged period of high fuel costs would be harder to absorb, increasing the risk of higher freight rates, more expensive delivery and, ultimately, higher prices for consumers.

For international retailers, the US diesel surge is a reminder that an energy shock can quickly become a retail supply-chain problem.