Why are carriers unwilling to commit to longer-term pricing right now?

According to Uber Freight, diesel costs are changing week-to-week, making it impossible for carriers to forecast costs accurately. Carriers on spot market shipments prefer loads booked in the near term to avoid unexpected fuel spikes. Most carriers now require fuel surcharge mechanisms tied to published indices (weekly or monthly) in contract pricing, but these lag behind actual price movements, creating significant risk on fixed-rate agreements.

What is the cash flow problem affecting carriers?

WiseTech Global explains that carriers pay higher diesel costs at the pump immediately but are not reimbursed by shippers until weeks later, based on fuel indices. During periods of rapid fuel increases, this timing gap creates acute cash flow pressure. Smaller carriers are hit harder because they have less financial cushion to absorb these gaps.

How much has fuel cost actually increased for carriers?

Summa Energy reports that every 10,000 gallons a fleet burns now costs over $25,000 more than at the start of the year. Fuel cost per mile for the average shipper has increased 92% year-over-year. National diesel prices are at $6.18 per gallon, a 70.7% increase from the prior year.

Is fuel the main driver of freight rate increases?

No. DAT Freight & Analytics calculates that increased fuel costs since the war started account for about one-fifth of trucking rate increases since last year. Tighter capacity is the bigger factor. As capacity exits faster than loads increase, freight markets experience greater volatility and higher rates.

Which freight lanes and sectors are most affected by fuel costs?

Dean Croke at DAT notes that diesel impacts longer-haul and refrigerated freight most significantly. Short-haul moves from port ramps to warehouses see minimal fuel cost impact. Produce and other temperature-controlled goods are hardest hit because transport represents a larger percentage of total costs in those supply chains.

Shipping & Freight

High Impact

Diesel Surge 70% YoY Threatens Trucking Capacity Ahead of Peak

Oct 17, 2026

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The signal

Diesel prices have surged 70.7% year-over-year to $6.18 per gallon, driven largely by geopolitical tensions in the Middle East and shipping lane disruptions. This dramatic increase is compressing carrier margins, forcing some operators to exit certain routes or markets entirely, which is reducing trucking capacity at the worst possible time heading into peak holiday shipping season. The structural challenge lies in the timing mismatch between fuel purchases and reimbursement through fuel surcharges.

Carriers pay elevated prices at the pump but are reimbursed on weekly or monthly indices weeks later, creating significant cash flow stress. WiseTech Global data shows fuel now represents 22% of total transportation spending, up from a 15% long-term average, and fuel cost per mile has increased 92% year-over-year for the average shipper. Capacity tightening is emerging as the more critical driver of freight rate increases than fuel alone, according to DAT Freight Analytics.

Combined with regulatory pressures already forcing driver exodus and legal rulings creating broker uncertainty, the market faces a perfect storm. Shippers should expect higher bid season rates, longer carrier commitment lead times, and potential service limitations on certain lanes, particularly refrigerated and long-haul routes.

#diesel-prices

#trucking-costs

#peak-season-shipping

#fuel-surcharges

#freight-capacity

#supply-chain-disruption

#geopolitical-risk

#carrier-viability

#transportation-rates

#holiday-shipping

Frequently Asked Questions

What This Means for Your Supply Chain

Simulation Suggestion

this month

What if diesel prices remain elevated through Q1 2024?

Model the scenario where diesel remains at current levels (6.18/gallon or higher) through the next 90 days. Assess impact on: carrier cost absorption on fixed-rate contracts signed in prior bids, working capital requirements for shippers, viability of smaller carrier operations, and freight rate escalation through January peak season.

Run this scenario

Simulation Suggestion

immediate

What if fuel surcharge indices lag real-world price swings by 2 weeks?

Model the actual cash flow impact when published fuel indices (weekly/monthly resets) lag real pump prices by up to 14 days. Calculate carrier loss exposure during sharp upward spikes and working capital required to bridge timing gaps. Assess which carrier size categories face insolvency risk and what surcharge adjustment frequency would be needed to maintain operational stability.

Run this scenario

Simulation Suggestion

this month

What if additional carriers exit regional and long-distance markets?

Simulate progressive carrier capacity reduction (5-10% exit in Q4) from cost pressures, with focus on refrigerated, produce, and long-haul lanes. Model downstream effects on: freight rate volatility, shipper ability to secure commitments beyond 2-3 weeks, service level risk in underserved geographies, and inventory holding costs at ports/distribution centers.

Run this scenario

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Supply Chain Simulation: How It Works and How to Choose Software

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