Uber Freight Warns of a Q4 Rate Surge as Tender Rejections Hold Near 13.5% and Diesel Tops $5.65

Uber Freight's Q3 Market Update & Outlook report, published Sept. 10, tells shippers to plan for a tighter fourth quarter than the summer's calm suggested. The numbers it cites are not a forecast so much as a description of what already happened in July and August: contract and spot rates converged, tender rejections stayed elevated, diesel spiked, and the driver pool kept shrinking.

National average dry van contract linehaul rates rose 18% year over year in July to $2.39 a mile, the report says — the largest June-to-July jump on record, at 13 cents. Dry van spot linehaul rates matched that same $2.39 figure in July, 47% above a year earlier. Spot catching up to contract in the middle of a peak, rather than staying below it, is the condition under which carriers start declining contracted freight to chase better-paying spot loads — which is exactly what tender acceptance data shows happening. By the week of Aug. 26, spot had eased to $2.21 a mile, still 35.6% above the same week a year ago.

Tender acceptance improved only modestly, from 76% in July to 78% in August, versus a historical range of 90–94%. FreightWaves' own SONAR Outbound Tender Reject Index read 13.45% as of Sept. 10 — corroborating the Uber Freight numbers independently — and SONAR analyst Zach Strickland told FreightWaves the combination of lean retailer inventories and uncertain holiday demand poses "a huge risk for this index as we move into the 4th quarter," even as he expects some capacity to return in the near term.

Diesel is doing its own work on the cost side. The national average hit $5.652 a gallon the week of Aug. 24 — the highest print of 2026 and 52.4% above a year earlier — up from a July low of $4.58, a roughly 23% jump in about a month. Uber Freight's report notes that small truckload carriers running on thin margins are increasingly likely to park equipment and wait out high fuel costs rather than haul at a loss, which pulls capacity out of the market at the same time volumes typically build for peak season. "The companies navigating this best don't wait for disruption to show up in the numbers," Uber Freight CEO Rebecca Tinucci said.

The driver pool is also smaller than it was a year ago for reasons beyond economics. The report counts more than 48,000 noncompliant drivers who exited the industry over the past year amid the federal English-proficiency and CDL enforcement push, and separately notes Class 8 truck order backlogs run roughly nine months — meaning carriers that do want to add capacity can't get trucks quickly even if they order them today.

Cross-border capacity has tightened by a similar mechanism. Roughly 20,000 Mexican-domiciled truck drivers lost U.S. visas between April 2025 and April 2026, and the number of active Mexican-domiciled carriers running to the southern border is down 6.3% since late December. The Laredo dry van load-to-truck ratio sat at 8.0–8.5 in mid-August — down from roughly 10-to-1 in the second quarter, but still 61.9% higher year over year — while Laredo produce exports are up 8% year over year, adding volume onto a shrunken carrier base. Uber Freight puts Mexico-to-U.S. long-haul spot rates 8–15% above mid-February levels, and as much as 30% higher on the most constrained corridors.

The forwarder angle

Contract rates are already behind the market. When spot matches or exceeds contract pricing, as it did in July, carriers have every incentive to reject tendered freight and wait for a spot load instead. Forwarders holding contracts without rate escalators or minimum-volume protections into Q4 should expect service failures on exactly the lanes where that gap persists, not just a price increase.

Small-carrier attrition is a capacity story, not just a cost story. Diesel near $5.65 a gallon is squeezing exactly the owner-operators and small fleets forwarders lean on for regional and drayage capacity. If those carriers park equipment rather than run at a loss, the effective capacity pool shrinks further right as peak-season volume arrives — worth checking now whether backup carriers are lined up rather than after a tender gets rejected.

Cross-border lanes carry the most compressed math in this report. An 8.0–8.5 load-to-truck ratio at Laredo is tighter than it looks next to the Q2 comparison, because the carrier base serving it is smaller than a year ago (down 6.3%) while produce volume is up. Brokers moving Mexico-origin freight should build in rate and transit-time buffers now, particularly on the corridors Uber Freight flags as running up to 30% above February pricing.

The Class 8 backlog caps how fast this resolves. Roughly nine months of order backlog means new truck capacity ordered today doesn't show up until well into 2027 — this tightness is not a one-quarter event that clears on its own, regardless of how holiday volumes come in.