Non-Trucking Liability (Bobtail)
Also known as: NTL, bobtail insurance, non-trucking use liability, deadhead coverage
Non-trucking liability (NTL) — commonly called bobtail insurance — fills a specific gap for owner-operators leased to a motor carrier. When you're under dispatch (hauling a load under the carrier's operating authority), the carrier's primary liability policy responds. But the moment you're not under dispatch — driving the tractor home, to the shop, or to run a personal errand — that carrier coverage typically shuts off. NTL covers your liability during that non-business use.
'Bobtail' technically means driving the tractor with no trailer attached, while NTL more precisely means driving while not under dispatch (with or without a trailer); the terms are used interchangeably in the market. NTL is liability only — it does not cover physical damage to your truck (that's physical damage coverage) or cargo (that's motor truck cargo).
NTL is usually inexpensive because the exposure window is small, and it is frequently required by the lease agreement with your motor carrier. It is distinct from the MCS-90 endorsement (a federal financial-responsibility guarantee) and from on-hook coverage (for vehicles you tow). See our full non-trucking liability guide.
Real-world scenario
Marcus Delgado runs Ironwood Hauling LLC, a one-truck operation built around a 2019 Freightliner Cascadia valued at about $95,000. He owns the tractor but has no operating authority of his own, so he leases on to Redline Freight Systems, a regional carrier that dispatches his loads under its own MC authority. Redline's commercial auto policy covers Marcus only while he is under dispatch — hauling a Redline load or moving at Redline's direction. The moment the trailer is dropped and he is driving the tractor for personal reasons, that coverage evaporates. To fill the gap, Marcus buys a Non-Trucking Liability policy for $1,150 a year (about $96 a month) with a $1,000,000 combined single limit and no liability deductible.
On a Saturday afternoon, off dispatch and driving bobtail 18 miles to pick up parts, Marcus runs a red light and T-bones a sedan. The other driver's medical bills reach $220,000, lost wages add $34,000, and the totaled sedan costs $28,000. Because Redline's policy does not respond off-dispatch, Marcus's NTL policy steps in: it funds $48,000 in legal defense and settles the bodily-injury and property-damage claims for $265,000, bringing the total incurred to roughly $313,000 — comfortably inside the $1,000,000 limit. Without NTL, Marcus would have faced that $313,000 personally, likely bankrupting Ironwood Hauling.
At renewal, the single at-fault loss pushes his premium to $1,380. His separate physical-damage coverage on the tractor still carries a $2,500 deductible, but that is a different policy — NTL only handles liability to others when the truck is not working for the carrier.
How it affects your premium
Non-Trucking Liability is one of the cheapest coverages a leased owner-operator buys, but the exact premium still swings with the risk profile the underwriter sees:
- Radius and territory: A long-haul driver whose personal use spans multiple states prices higher than a short-haul operator, even though NTL is meant for off-dispatch driving. See radius of operation.
- Liability limit selected: Most lease agreements demand a $1,000,000 combined single limit; dropping to $500,000 saves little because the carrier usually mandates the higher number.
- Driver MVR and experience: The operator's personal motor-vehicle record, accidents, and years driving a Class 8 tractor heavily influence the rate.
- Tractor value and use: A newer, higher-value tractor that doubles as personal transportation raises exposure and premium.
- Lease structure with the carrier: Whether the driver is exclusively dispatched by one carrier or hauls for several affects how often the truck is truly "non-trucking."
- Claims history: A prior at-fault loss, like the example above, can raise premium 15-25% at renewal.
- Garaging location: The state and ZIP where the tractor is parked overnight drives base rates, since litigation climate and repair costs vary widely.
Common misconceptions
Myth: Non-Trucking Liability covers me anytime I'm driving, including when I'm hauling a load.
Reality: NTL (also called bobtail coverage) applies only when the truck is not under dispatch for the carrier. While you are hauling a load or moving at the carrier's direction, the carrier's commercial auto policy is the coverage that responds — NTL specifically excludes any business use.
Myth: NTL and bobtail insurance are two completely different policies I need to buy separately.
Reality: They cover essentially the same exposure. "Bobtail" technically means driving the tractor with no trailer attached, while NTL is the broader term for liability during any non-business use of the truck. In practice, insurers and carriers use the two names interchangeably for the coverage that responds when you're off dispatch — as opposed to running deadhead miles with an empty trailer, which is often still treated as being in the carrier's service.
Myth: If I have NTL, I don't need physical damage coverage on my truck.
Reality: NTL only pays for injury and damage you cause to others; it does nothing for your own tractor. To repair or replace your rig you need separate collision and comprehensive coverage.
Frequently asked questions
Do I need Non-Trucking Liability if I'm leased to a carrier that already insures me?
What's the difference between Non-Trucking Liability and bobtail insurance?
How much does Non-Trucking Liability cost?
Does NTL cover my cargo or the trailer I'm pulling?
Will NTL respond if I get into an accident while deadheading back after delivering a load?
Sources cited
Need non-trucking liability (bobtail) coverage?
Compare quotes from 10+ commercial insurance carriers in 5 minutes. Free, no contact info required.
Get My Quotes →