What is power only trucking?

Power only meaning in trucking

Every load of truck freight needs three things: a tractor, a driver and a trailer. In most trucking, one company brings all three. Power only splits them. The carrier brings the power, meaning the tractor and the driver, and the trailer belongs to somebody else.

That somebody is usually one of three:

• A broker or large carrier with a trailer pool. Big logistics companies keep thousands of trailers parked at shipper docks and drop yards and need outside tractors to move them.
• A shipper with its own trailers. Retailers, manufacturers and distribution centers often own or lease trailers and stage them for loading.
• A trailer maker, dealer or leasing company. New and used trailers have to get from the factory or lot to whoever bought or rented them.

The power only trucker drops the trailer at the end of the run and leaves with the tractor alone, or with the next trailer. Nothing about the tractor is special. Any semi with a working fifth wheel can pull a power only trailer. What changes is the business: you are paid to move someone else's equipment.

Power only trucking is still regular for-hire freight. Interstate carriers need a USDOT number and MC operating authority from FMCSA, and the carrier name on the rate confirmation is yours.

How a power only load works

How a power only load runs

1. STEP 1BookedBroker, program or shipper books your tractor for their trailer
2. STEP 2BobtailYou drive the tractor alone to the trailer pool or yard
3. STEP 3HookInspect, check the seal, hook the trailer, connect air and lights
4. STEP 4HaulRun the load under your authority, with tracking on
5. STEP 5DropDrop the trailer at the receiver or yard, then go to the next one

Here is the same thing in more detail, the way most loads run:

1. The load gets booked. A broker, a program app or a shipper offers the load. It lists where the trailer sits, whether it is loaded, the pickup and delivery windows, and the pay.
2. You bobtail to the trailer. The tractor drives alone (bobtail) to the yard, dock or pool. These empty miles are deadhead and are usually unpaid unless you negotiate them in.
3. You inspect and hook. Walk around the trailer, check tires, lights, brakes and the doors, match the seal number to the paperwork, hook up, and connect the air lines and the light cord. If the trailer has damage, report it before you leave, with photos.
4. You haul it. The trailer is your responsibility under the trailer interchange agreement until you drop it. Most brokers and programs want tracking through their app or your ELD.
5. You drop it. At the receiver or a yard, unhook, get the drop documented and move on to the next trailer.

Some programs run this as a loop. J.B. Hunt describes its power only service as searching for loads in its Carrier 360 app with a Power Only filter, booking, and signing the trailer interchange agreement when needed. Large shipper networks such as Amazon Relay run similar trailer-pool freight with their own published requirements.

Who supplies what

The quickest way to see what power only changes is side by side:

Two lines in that table matter more than the rest. First, the trailer owner keeps the trailer, but the trailer interchange agreement usually makes you responsible for damage while it is hooked. Second, you still need liability and cargo insurance like any carrier; the federal minimum liability for general freight is $750,000 (49 CFR 387.9), and programs often set higher limits. Amazon Relay, for example, lists $1,000,000 in auto liability.

Power only vs owning a trailer

Without a trailer you skip a big monthly cost: the payment, trailer insurance, tires, brakes and plates. You also skip the need to find freight that fits your specific trailer. In exchange, you depend on other people's trailers being ready, you drive more empty miles to reach them, and you sign an interchange agreement for each owner.

Owning a trailer opens freight that power only can't reach, and some carriers do both: their own van for steady customers, power only between those loads. The full comparison, including reefer and flatbed, is in our guide to power only vs owning a dry van, reefer or flatbed.

Day cab or sleeper?

Day cab vs sleeper for power only

Day cab

Shorter, lighter, cheaper to buy. Fits regional drop and hook, yard shuttles and loads that get you home at night.

Sleeper

A berth for the 10-hour break on the road. Opens longer program lanes and multi-day runs.

There are no special power only truck types. The choice is the same one every tractor owner makes:

• Power only day cab. Good for regional drop and hook, yard-to-yard shuttles, port and rail work and tow away runs that get you home at night. Lighter and usually cheaper to buy.
• Power only sleeper (sleeper cab). Needed if you will take your 10-hour off-duty break on the road (49 CFR 395.3). Opens long program lanes and multi-day runs where the money often is.

A day cab can run power only profitably if your local market has enough trailer pools and drop yards. A sleeper gives you more freight to choose from.

Kinds of power only loads

Most power only freight falls into five patterns:

• Preloaded drop and hook: the trailer is loaded and sealed before you arrive.
• Live load: you bring an empty trailer to the dock and wait while it is loaded.
• Tow away: you move an empty or new trailer, often from a manufacturer or dealer.
• Load out: you pull a trailer that leaves loaded or carries other cargo.
• Intermodal: you move a container on a chassis between a rail ramp or port and a customer, which needs extra interchange paperwork.

The difference between the two trailer-delivery moves is covered in power only tow away vs load out, and the freight itself on our power only loads page.

Pros and cons

Who runs power only

Power only suits owner-operators who own a tractor and their own MC and don't want a trailer payment, small fleets that want to grow without buying a trailer per truck, and carriers with their own trailers who want to keep tractors moving between their own loads. Large carriers and brokers run trailer-pool programs to supply the freight; how those programs approve carriers is covered in our guide to power only trucking companies and carrier programs.

If you run power only and want help keeping the tractor loaded, that is what our power only dispatch service does: we find the trailers, negotiate the pay and handle the paperwork. You can see what a dispatcher would cost on your numbers with the power only dispatch fee calculator.