What Is Backhauling?

Every carrier knows the backhaul problem: you deliver a load, and now you need something to haul on the way back, or you're burning fuel and driver hours for nothing. It's one of the oldest inefficiencies in trucking, and there's an entire industry of load boards and rate tools built around solving it.

But there's a version of this problem that backhaul search doesn't touch. What happens when you have the backhaul lined up - a paying load, a good rate, a broker ready to book -  and you don't have a trailer to put under it?

That's a trailer problem, not a load problem. And it's the one on-demand trailer rental is built to solve.

What is backhauling?

A backhaul is a load a carrier picks up on the return trip after a delivery, instead of driving back empty. Deliver Chicago to Atlanta, and instead of deadheading home, a backhaul gets the truck moving again, either back toward the origin or on to the next stop.

The alternative is deadheading: running with no freight generating revenue while still burning fuel, wearing down equipment, and paying a driver. According to ATRI's 2025 Operational Costs of Trucking report, empty miles climbed to an average of 16.7% of total miles in 2024, at an average operating cost of $2.26 per mile, meaning close to one out of every six miles a truck runs, it's paying full price for nothing in return.

Backhaul planning is how carriers keep that percentage down: searching for return freight before delivery, checking what a lane actually pays, and stringing loads together instead of booking one leg at a time.

The problem backhaul search doesn't solve

Backhaul search assumes you have a trailer. Most of the time, that's a safe assumption: the trailer is already hitched, already moving, already part of the equation.

It stops being a safe assumption the moment a carrier's trailer pool doesn't match their freight pool. That happens more often than most fleets plan for, and it's a big enough problem that we've written about why trailer imbalance happens in more depth, but the short version shows up in a few familiar scenes:

• A driver drops a loaded trailer at a customer dock, and it sits there for days before it's unloaded. The tractor is free, but the next load needs a trailer that isn't.
• A backhaul lines up in a market where the carrier doesn't have equipment, and repositioning an owned trailer there costs more than the load is worth.
• Freight is seasonal or regional, and the fleet either owns too many trailers for the slow months or not enough for the peak ones.

In every one of these cases, the load isn't the constraint. The trailer is. And a load board can't fix that, because a load board was never built to track equipment, only freight. That's the same distinction we draw in Trailer Repositioning vs. Empty Miles: repositioning often creates empty miles, but not all empty miles are repositioning, and treating them as the same problem is how fleets miss the equipment side of it.

Why this gap costs more than empty miles

Deadhead miles are a visible, per-trip cost. Easy to calculate, easy to point to. A trailer shortage is a slower, quieter drain: a backhaul a carrier has to pass on because there's no equipment to run it, a driver sitting idle waiting on a trailer, or a fleet that bought more trailers than it needs just to cover the occasional spike, and now pays for that capacity twelve months a year to use it three.

The numbers back this up. REPOWR's own network data puts the cost of empty-mile inefficiency at roughly $2,400 per trailer, per year, and separately, industry teams have pegged the cost of a single reactive load-out or reposition move at around $500 before factoring in the time a team spends arranging it. On top of that, the average trailer sits idle for close to 40% of its life, a figure that goes well beyond what's captured in mileage alone. We break this down further in The Hidden Cost of Idle Trailers.

Carriers who solve the load side of backhauling but not the trailer side are still leaving money on the table. They just don't see it on the same per-mile basis, so it's easier to miss.

How on-demand trailer rental closes the gap

On-demand trailer rental applies the same logic to equipment that backhaul search applies to freight: instead of carrying fixed capacity to cover every possible need, a carrier taps into a shared network of available trailers and pulls one only when a specific load requires it. It's the same model that lets power-only carriers build entire operations around the marketplace instead of an owned trailer pool.

That's the model REPOWR is built around - a marketplace where carriers can find and reserve trailers near where they need them, rather than repositioning owned equipment across the country or turning down freight because the right trailer isn't in the right place. Our State of Trailer Utilization 2025 data shows just how directional this demand really is: 83% of REPOWR rentals end in a different market than where they began, and 72% of capacity needs are filled same-day. Trailers aren't looping back. They're moving with the freight, just like a backhaul.

Instead of asking "do we own a trailer that can cover this," the question becomes "is there a trailer available where this load needs one," and that answer can come from anywhere in the network, not just a carrier's own yard. On the supply side, tools like TOP (Trailer Optimization Platform) automate the other half of this: identifying surplus trailers before they go idle and getting them listed where demand actually exists, so the network has capacity to draw from in the first place.

For a fleet, that turns the trailer-to-freight mismatch from a fixed cost into a variable one. Trailer capacity flexes with the freight that's actually moving, just as backhaul search lets a load plan flex with what's actually available in a market.

What makes a good on-demand trailer match

Not every available trailer is the right one. A few things matter before booking:

• Proximity to pickup: a trailer three hours away eats into the same margin an out-of-route backhaul does.
• Trailer type and condition: matching equipment to the freight, not just grabbing whatever's closest.
• Reservation lead time: how far in advance a trailer can be locked in, especially for time-sensitive freight.
• Total cost versus the alternative: renting on demand should be cheaper than the deadhead, detention, or missed-load cost of not having equipment at all.

The same discipline that goes into evaluating a backhaul load - rate, distance, timing, downstream market - applies to evaluating a trailer match. The asset is different; the math is the same.

Planning trailers the way carriers plan loads

Experienced carriers don't book one load at a time. They plan sequences: outbound, backhaul, next outbound. The same forward-planning habit applies to trailers. Instead of discovering a trailer shortfall the day a load is ready to move, fleets that plan equipment alongside freight can see where a gap is coming and reserve a trailer before it becomes a missed load or a rushed, overpriced scramble.

That's the shift on-demand trailer rental makes possible: equipment planning stops being a once-a-quarter fleet-sizing exercise and becomes something a dispatcher can do the same way they'd search for a backhaul - a few days out, based on what's actually on the board.

Putting it together

Backhaul search solved the empty-load half of the equation. The empty-trailer half, the one that shows up as a load a carrier can't cover, a driver waiting on equipment, or a fleet paying to own capacity it only needs occasionally, has largely been left to guesswork.

On-demand trailer rental treats trailer availability the same way modern freight matching treats load availability: as something to search for, reserve in advance, and pull only when it's needed, rather than something a fleet has to permanently own and carry.

For carriers who've already tightened up their backhaul strategy, this is the next lever. The freight side of empty miles has plenty of tools built around it. The trailer side is where REPOWR fits in.

FAQs

What is the difference between backhauling and on-demand trailer rental? 

Backhauling refers to finding a paying load for the return trip so a truck isn't running empty. On-demand trailer rental addresses a different constraint: ensuring the right trailer is available where and when a load needs one, regardless of the truck’s direction.

Why would a carrier need to rent a trailer if they already own trailers? 

Owned trailer fleets are sized for average demand, not peak demand or freight that shows up outside a carrier's normal lanes. On-demand rental lets a carrier cover those gaps without buying or leasing more trailers than they need most of the year.

Does on-demand trailer rental work for one-off loads or only ongoing capacity? 

Both. It can cover a single load where a carrier is short a trailer, or serve as an ongoing flexible layer of capacity alongside an owned fleet.

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