For three and a half years the smallest tier of trucking has been quietly emptying out, with the number of tractors run by one-to-six-truck carriers sliding from a 2023 peak near 398,000 all the way back to about 362,000, and the easy explanation, that owner-operators are simply going out of business, misses what the federal data actually shows, because a large share of those trucks never leave the road at all, they just change whose name is on the authority. The story of the shrinking owner-operator tier is really two stories, one about why they are getting squeezed out and one about where the equipment lands, and the second one is the more interesting of the two.
The Exodus, By The Numbers
The scale of the retreat is clear in the fleet-size data. FreightWaves SONAR’s count of tractors operated by carriers with one to six power units (TCTCO.USA) sits at 362,033, below both its five-year average of about 378,800 and its 12-month average of roughly 364,960. The segment surged during the freight boom, as pandemic-era demand and easy authority pulled a wave of new entrants into the market, peaked close to 398,000 tractors in the first half of 2023, and has declined almost without interruption since. That is roughly 36,000 tractors, on the order of nine percent of the segment, pulled back out of the smallest tier over three and a half years, effectively unwinding the entire boom.
What makes that remarkable is how many operators the tier still holds. In the latest FMCSA census, more than 1.8 million active carrier registrations fall into the one-to-six-truck band, a count that includes private and intrastate operators alongside for-hire freight haulers, and it is the overwhelming majority of all registered carriers. This is not a small corner of trucking thinning out, it is the broadest base of the market contracting at the edges, and it has been doing so steadily regardless of which way freight has moved month to month.
The Squeeze, Starting With Fuel
The reasons owner-operators are leaving are not mysterious, they are mathematical, and they come from both sides of the ledger at once. On the cost side, running a truck set a record in 2025, with the American Transportation Research Institute putting the average marginal cost at 2.336 dollars per mile. In that 2025 breakdown, driver pay was the heaviest line at roughly 82 cents per mile, with fuel the next tier down at about 48 cents. Then 2026 rewrote the fuel math entirely. Diesel set records this year, with the Department of Energy’s national on-highway average topping its previous all-time high in September and reaching 6.127 dollars a gallon by the week of November 9.
At the six to seven miles per gallon a working truck gets, diesel over six dollars a gallon runs roughly a dollar a mile in fuel alone, close to double what fuel cost a year earlier, and that increase landed on top of a cost base that was already the highest ATRI had ever recorded. The run-up was not purely a refining story, crude oil climbed back above 100 dollars a barrel in the same stretch, but diesel outran crude as global refining capacity tightened. For the operator trying to pencil out a load, a cost that used to be the second or third line on the sheet is now vying to be the biggest.
For the owner-operator, that dollar-a-mile fuel hit is close to unavoidable, because most small carriers never get the benefit of a fuel surcharge in the first place. A surcharge is largely a contract-freight mechanism, a separate line that moves with the Department of Energy’s weekly diesel average and shows up on dedicated and committed lanes. The small operator living on load-board freight from the spot market rarely sees one, because spot rates are quoted all-in, a single number that already bakes in whatever the broker is willing to pay that day. There is no surcharge line to adjust when diesel spikes, so the owner-operator absorbs the full move into a rate they never got to reprice. A mid-sized fleet running contract freight under a negotiated surcharge program recovers a chunk of every fuel increase, while the spot-dependent owner-operator recovers almost none of it. The same gallon costs them more and comes back to them less.
Insurance is the other cost that lands hardest on the smallest. Premiums ran around 10.6 cents per mile in 2025, up nearly four percent on the year and well above where they sat just a few years ago, and the operator with one or two trucks pays the most per unit with the least ability to self-insure or negotiate. Stack record fuel, rising insurance, and the fastest increases ATRI tracked in tolls, maintenance, and driver benefits on top of each other, and the structural problem is simple, there is no scale to spread any of it across.
The Other Jaw Of The Vise, Costs Outrunning Rates
Here is the part that gets misread. Rates are not the owner-operator’s problem the way they were a couple of years ago. Spot van and reefer rates have firmed through 2026, running stronger for this time of year than any season since 2021, and contract pricing is forecast to climb meaningfully into next year, with some dry-van estimates calling for double-digit increases. Freight volume, for its part, has stayed roughly flat rather than surging, with the SONAR Truckload Volume Index (STVI.USA) holding near its average instead of breaking higher.
So the squeeze on the small operator is not that rates are falling, it is that costs are rising faster than rates can keep up, and the single biggest of those costs, fuel, is the one a spot carrier has no surcharge to recover. A mid-sized fleet hauling contract freight captures the rising rate and claws back fuel through a surcharge program at the same time. The owner-operator on the load board captures the better rate but eats the full fuel increase underneath it, so even a firming market leaves them with thinner net than the headline number suggests. Put the two sides together and the picture is a margin vise, fuel and insurance climbing faster than even a rising rate can cover for a carrier with no surcharge and no scale, and the thinner the cushion, the faster it closes. For a lot of these operators, leaving does not mean parking the truck and walking away from the industry. It means making a rational business decision about where that truck can earn a living, and increasingly the answer is not under their own authority.
Where The Trucks Go, Part One
Here is where the federal data gets genuinely revealing. Pull the FMCSA census and break out, for each fleet-size band, the share of a carrier’s tractors that are leased rather than owned, and a clean pattern appears. Owner-operators run almost entirely owned equipment, with only about 6.9 percent of their tractors leased. Move up to small fleets of seven to 19 trucks and the leased share jumps to 18.2 percent. By the mid-sized band of 20 to 100 trucks, nearly a third of all tractors, 31.6 percent, are leased rather than owned, and in the 101-to-999 band it climbs past 40 percent.
That rising curve is part of the mechanism of the migration, though it is worth being precise about what it captures. A leased tractor inside a larger fleet can be a former owner-operator who surrendered their own authority and leased on, bringing the truck with them, and it can also be equipment the fleet leases from a full-service lessor like Penske or Ryder. Both rise with fleet size, and both point the same direction, that larger fleets run a growing share of their capacity on trucks they do not own, which is exactly where owner-operators who give up their own authority tend to land. In the 20-to-100 band alone, the census shows more than 217,000 term-leased tractors sitting alongside roughly 466,000 owned ones, and that owned-tractor figure lines up closely with SONAR’s separate count of 470,402 tractors for the same band, a useful cross-check between two independent reads of the same market.
This is a big part of why the mid-sized segment keeps setting records while the smallest one shrinks. The 20-to-100 band is the natural landing spot for a capable operator who no longer wants to carry their own insurance, chase their own freight, and shoulder their own back-office load. The truck keeps rolling, the driver keeps driving, and the authority quietly changes hands.
Where The Trucks Go, Part Two
Not every exiting owner-operator leases on. Some sell the truck outright, and that equipment does not leave the road either, it tends to get bought by fleets a size or two up that will take good used iron at a discount when smaller operators are offloading it. Whether through a lease-on or a sale, the trucks are consolidating into larger operations better built to run them profitably when fuel is this expensive.
Why The Middle Is Doing The Absorbing
The 20-to-100 tier is small in number but heavy in trucks. Only about 44,500 active carriers fall into that band, under two percent of all carriers, yet they operate roughly 1.75 million power units. They sit in the efficiency sweet spot, big enough to spread the rising cost of fuel, insurance, and equipment, and small enough to stay nimble and regional. A fleet in this band can negotiate a real fuel-surcharge program, buy diesel in volume, and spread insurance and maintenance across dozens of trucks, all things the lone owner-operator cannot. That is the cost advantage that lets the middle keep a truck earning when the same truck would lose money running on its own authority.
What It Means For The Operator Weighing The Move
For the owner-operator looking at their own segment in that long decline, the takeaway is not that the small carrier is doomed, it is that running small now demands more discipline than it used to. The operators holding their ground are the ones who know their true cost per mile to the penny, who built direct relationships with local shippers instead of depending on the spot market, and who run the truck like a business rather than a glorified job. The ones leasing on are frequently making the smart call, trading some independence for a cost structure and freight base they cannot build alone. The operators who end up surrendering their authority with nothing to show for it are usually the ones who drifted, undercapitalized and spot-dependent, until the fuel bills closed the math on them even as rates improved. The data cannot tell an individual which path to take, but it makes the stakes of the choice unmistakable.
Why It Matters
The steady shrinking of the one-to-six-truck tier is not a wave of trucks leaving the industry, it is a migration of equipment up the fleet-size ladder, squeezed out by record fuel and operating costs that climb faster than even a rising rate can cover for a spot carrier with no surcharge, and absorbed by mid-sized fleets through lease-ons and used-truck purchases, with the leased share of a fleet’s tractors climbing from under seven percent for owner-operators to nearly a third for the 20-to-100 band. For carriers, brokers, and shippers, that matters because the capacity base is quietly consolidating into larger, more durable operations that can withstand six-dollar diesel and flat volumes, which makes it stickier and harder to shake loose, and for the owner-operator specifically it reframes the central question of the moment, not whether to stay in trucking, but whether to stay in trucking alone.
This analysis draws on FreightWaves SONAR data for tractor counts by fleet size (TCTCO.USA at 362,033 and TCTCM.USA at 470,402) and the SONAR Truckload Volume Index (STVI.USA), as of early November 2026, and on a FreightWaves analysis of the FMCSA Company Census File, snapshot dated November 9, 2026, for the fleet-size distribution and the leased-versus-owned tractor breakdown. Operating-cost and insurance figures are from ATRI’s 2026 Operational Costs of Trucking report. The diesel price is the U.S. Department of Energy on-highway average of 6.127 dollars a gallon for the week of November 9, 2026. Spot and contract rate context reflects published 2026 rate data and forecasts. Census power-unit data is self-reported through MCS-150 filings and includes private and intrastate carriers, and term-leased tractor counts include both owner-operator lease-ons and full-service equipment leases.
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