ATA Tonnage Falls 0.5% in August as Capacity Tightens
The for-hire truck tonnage index dropped to 112.7 in August, down 1.6% year over year, even as rejection rates and spot rates signal tighter capacity.
Why did tonnage fall while capacity tightened in August?
The ATA For-Hire Truck Tonnage Index fell 0.5% from July to 112.7 in August, down from 113.3 the prior month. Year over year, the index declined 1.6%.
The drop comes at a time when other market signals point to tightening capacity. Tender rejections jumped above 14% heading into Labor Day, outpacing the past three years. Spot rates rose across dry van, reefer, and flatbed for the first time since May, with dry van up 9 cents and reefer up 13 cents.
Tonnage measures the weight of freight moving through for-hire carriers. A decline in tonnage while rejection rates climb suggests shippers are tendering more loads than carriers can accept, but the loads themselves are lighter or shorter-haul. That combination squeezes revenue per truck even when spot rates tick up.
What the tonnage-rejection split means for small fleets
For a 5-truck or 20-truck fleet, the divergence between falling tonnage and rising rejection rates creates a planning problem. Rejection rates above 14% typically mean brokers are calling more carriers to cover the same load, which should push spot rates higher. That part is playing out. But if the freight moving is lighter per shipment, the per-mile rate gain doesn't translate to higher settlement checks unless you're running more loads per week.
The year-over-year tonnage decline of 1.6% also suggests the freight market hasn't returned to 2025 volume levels, even with the late-summer capacity squeeze. Fleets that expanded truck count expecting a sustained rebound may be running more equipment than the market can fill profitably.
How tonnage fits with other August data
Manufacturing PMI slipped to 54.6 in August, with new orders cooling 3 points to 53.7. That slowdown in factory orders typically shows up in tonnage data a few weeks later, as finished goods move from plant to warehouse to retail. The August tonnage dip aligns with that timeline.
Old Dominion reported August yield up 13% year over year as diesel climbed 46%, but tonnage stayed slightly negative. The LTL carrier's pricing power in a tight market mirrors what's happening on the truckload side: rates are rising, but volume isn't.
Port cargo volumes showed uneven strength in July, tightening capacity in pockets but not across the board. That unevenness likely carried into August, with some lanes seeing heavy tender activity while others stayed soft.
The bill for a 10-truck fleet
A 10-truck fleet running 2,500 miles per truck per week at $2.10 all-in per mile grosses $52,500 weekly. If tonnage per load drops 5% but you run 5% more loads to keep trucks full, your fuel and labor costs rise while gross revenue stays flat. The spot rate bump helps, but only if you're selective about which loads to take. Rejection rates above 14% give you that selectivity, but only if you have the dispatch capacity to say no and wait for the next call.
The tonnage index doesn't directly predict next month's rates, but it does tell you whether the freight moving through the system is getting heavier or lighter. August's 0.5% monthly decline, combined with a 1.6% year-over-year drop, suggests the market is still working through excess capacity even as seasonal demand tightens. That means the spot rate gains you're seeing now may not stick past peak season unless tonnage starts climbing again.
