Updated 2026-10-30
Ask ten drivers and you may get ten definitions. Bobtail insurance and non-trucking liability are both meant for leased-on owner-operators, and both cover liability, not damage to your own truck. The difference lies in when each one applies.
Bobtail: no trailer attached
Bobtailing means driving a tractor without a trailer. Bobtail liability policies have historically been written to cover the tractor when no trailer is attached. Depending on the form, that can include trips that are business related, such as heading to pick up a trailer.
Non-trucking: not under dispatch
Non-trucking liability looks at the purpose of the trip rather than the trailer. It covers personal use of the truck when you are not operating in the business of any motor carrier, whether a trailer is attached or not. It typically excludes any trip made for a carrier.
Why the label is not enough
Insurers write their own forms. Some policies called bobtail work like non-trucking liability, and some non-trucking policies add or remove conditions. What matters is the definition of covered use in your policy and how it fits with your carrier's liability policy.
Situations to think through
- Driving home after dropping a loaded trailer at the end of a dispatch
- Taking the truck to a shop for maintenance
- Picking up an empty trailer for the next load
- Using the truck to run personal errands on a day off
For each one, ask: is the carrier's policy responding, or yours? A good agent can walk through these examples with your lease and your policy side by side.
What your carrier requires
Many leases name the coverage the carrier wants and often require the carrier to be an additional insured. Follow the lease, and if it asks for non-trucking liability, do not substitute a bobtail form without the carrier's approval.