Class 8 truck sales jump 30% in September, but orders and 2027 engine costs urge caution

Fleets bought more new heavy trucks in September than they did a year earlier, even as the year as a whole still trails. That is a useful read on how carriers see the market after months of firmer rates.

According to Omdia data reported by Transport Topics on Oct. 18, U.S. Class 8 retail sales reached 21,095 units in September, up 30% from 16,228 a year earlier and up 13.6% from 18,575 in August. Year to date, sales are 152,960 units, down 5% from 160,981 at this point in 2025.

Six of the seven major manufacturers grew. Freightliner led with 7,888 units, up 45.7%, followed by Peterbilt at 3,097 and Kenworth at 3,055. Volvo rose 45% and International rose 38.8%. Western Star was the only decline, down 25.5%.

Why fleets are buying

ACT Research's Steve Tam told Transport Topics that for-hire carrier profitability is a main driver of 2026 retail sales, and he pointed to depreciation rules and Section 179 tax planning as year-end approaches. Mack's Jonathan Randall and Volvo's Magnus Koeck both cited firmer freight rates, and Volvo said carriers with aging fleets are replacing equipment.

The rate backdrop fits. DAT's report for Oct. 4 to 10, published Oct. 13, put the van spot rate at $3.12 per mile including fuel, with van linehaul up 35% from a year ago. DAT said truck posts were more than 20% below a year ago, and its van load-to-truck ratio was 10.5 against 6.3 last year.

What it means for carriers

Orders tell a more cautious story than sales. FTR's preliminary September count, reported by FreightWaves on Oct. 5, was 21,300 net orders, up 18% from August and 3% from September 2025. FTR said surcharge-free model-year 2026 engine slots are essentially sold out and expects orders to hold near year-ago levels for a month or two until fleets know more about costs.

The open question is the EPA's 2027 NOx rule, which had not been finalized when FTR wrote. FTR estimated that nonconformance penalties could add $6,000 to $7,000 per truck, against $8,000 to $12,000 for a fully compliant engine. Carriers planning a purchase should ask dealers what is quoted, and when the price can change.

What shippers and brokers should watch

Strong buying can add capacity, but new trucks take months to arrive and tighter conditions are still showing up in the numbers. Retail sales are deliveries that have already happened, so they do not by themselves signal a flood of new capacity. Watch DAT's truck posts and load-to-truck ratios in the coming weeks. If truck posts recover while loads hold steady, contract rate pressure could ease. If they stay low, expect carriers to keep pricing selectively.