Record Diesel Fuel Prices Push U.S. Truckload Freight Rates Higher in September
National average diesel prices surpassed $6 per gallon for the first time in September, averaging $6.291 a gallon. The spike in fuel costs drove spot and contract truckload shipping rates higher across dry van, refrigerated, and flatbed freight, even as overall load volumes remained below year-earlier levels.
The rate increases were primarily driven by record fuel surcharges rather than increased shipping demand. Excluding fuel, underlying linehaul rates for dry van and flatbed freight actually declined month-over-month. Higher fuel bills have significantly squeezed carrier operating margins. For a truck traveling 500 miles per day, daily fuel expenses reached $524 in September, up by $214 per day compared to $310 in February. Roper Technologies, Inc. (NASDAQ:ROP) operates software and technology platforms serving the freight and logistics sector.
Market participants will watch whether spot market rates adjust quickly enough to cover rising operational expenses for carriers. Spot rate negotiations historically take three to four weeks to catch up with diesel price surges, leaving transportation providers to absorb immediate fuel cost spikes in the interim.
Key points
- National average diesel fuel prices surpassed $6 a gallon for the first time in September, averaging $6.291 per gallon.
- Broker-to-carrier spot rates reached $3.01 per mile for dry van, $3.62 for refrigerated, and $3.61 for flatbed freight.
- Record fuel surcharges drove the rate increases, reaching 84 cents per mile for van, 92 cents for reefer, and $1.01 for flatbed.
- Freight volumes remained below year-earlier levels across all three major equipment types.
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How we writeDisclaimerQuestions and answers
Why did truckload shipping rates increase in September 2026?
Truckload shipping rates rose primarily because national average diesel prices surpassed $6 a gallon for the first time, driving record fuel surcharges across dry van, refrigerated, and flatbed transport.
How much did diesel fuel costs increase for truckers in 2026?
Diesel prices averaged $6.291 per gallon in September, raising daily fuel costs for a 500-mile haul to $524. That is an additional $214 per day compared to $310 in February when diesel averaged $3.722 per gallon.
Did truckload freight volumes grow in September 2026?
Freight volumes were mixed month-over-month, with dry van down 1% and refrigerated loads down 5%, while flatbed loads rose 2%. However, volumes for all three equipment types remained lower compared to September 2025.