Truck and trailer insurance: the three trailer situations

Contents

1. Case 1: you own the trailer
2. Case 2: trailer interchange, under a written agreement
3. Case 3: a non-owned trailer without an interchange agreement
4. Comparison: owned, interchange, non-owned
5. Leased onto a carrier: whose trailer, whose insurance?
6. Worked example: one tractor, three trailers in a month
7. Questions to ask before you hook up
8. FAQ

Case 1: you own the trailer

Progressive's semi truck and trailer page says a standard semi tractor policy "covers your own tractor trailer". In practice that means the trailer is listed on your policy with its own description and stated value, and physical damage (collision and comprehensive) is bought for it just as for the tractor. If a lender financed the trailer, it will require that coverage and be named as loss payee.

Three things to check on your own trailer:

• Stated value. It caps the payment for a total loss. Update it when you buy, sell or refurbish a trailer.
• Dropped trailers. Ask how liability and physical damage apply when the trailer is parked or dropped at a customer, not just when it is hooked up.
• Every trailer listed. A trailer you own but forgot to list is a gap, not a detail.

Physical damage on the tractor itself is covered on the semi truck physical damage page.

Case 2: trailer interchange, under a written agreement

Some loads come in a trailer owned by another carrier or a shipper. Progressive's trailer interchange insurance page describes the coverage as "essentially Physical Damage insurance for non-owned trailers". Its conditions, as Progressive writes them:

• "The trailer in question must be in the insured person's possession under a written trailer interchange agreement."
• It protects you "if the trailer is damaged by collision, fire, theft, explosion or vandalism", up to the limit you choose, minus your deductible.
• You must also carry liability with the insurer, and "there must be at least one trailer, owned or not owned, listed for each tractor and/or pickup."

HUB International's truck insurance FAQ gives the same core idea: interchange "covers damage to a trailer the carrier doesn't own but is pulling under an interchange agreement." Progressive's hotshot page, relevant to hotshot set-ups since the coverage is offered for pickups too, adds that it applies while the trailer is in your possession, "even if they're not attached to your truck."

Case 3: a non-owned trailer without an interchange agreement

Some loads come with a borrowed or leased trailer but no interchange agreement. Insurers sell a separate non-owned trailer physical damage coverage for that case. Broker Higginbotham's explainer on trailer interchange (2022) describes the difference this way:

• "Non-owned trailer coverage only applies to someone else's trailer that is attached to the insured's tractor."
• "A trailer that is parked at a transfer hub or on a motor carrier's lot is not covered by non-owned trailer insurance."
• Interchange "only covers trailers specified in an interchange agreement, while non-owned trailer coverage protects any leased or borrowed trailer".

That is a broker's summary, not a standard rule: some insurers offer only one of the two, and the wording of your policy decides. Ask for the form and read the definitions of "attached", "in your possession" and "non-owned".

Comparison: owned, interchange, non-owned

Leased onto a carrier: whose trailer, whose insurance?

If you pull the carrier's trailers under a lease, the lease decides. 49 CFR 376.12(j)(1) requires the lease to state the carrier's duty to insure the public and to "specify who is responsible for providing any other insurance coverage for the operation of the leased equipment". If the carrier charges you for any of it, the lease must state the amount. Damage to the carrier's trailer, and deductions for cargo or property damage under (j)(3), are things to find in writing before you sign. The leased owner-operator page goes through the lease clause by clause.

Worked example: one tractor, three trailers in a month

An illustration, not a quote or a claim history. An owner-operator with his own authority runs one tractor:

1. His own dry van. Listed on his policy, physical damage at a stated value the lender approved.
2. A shipper's trailer, picked up under a signed interchange agreement. Trailer interchange coverage, with a limit at least equal to the trailer value named in the agreement. If the trailer is damaged while dropped at a yard in his possession, the interchange coverage is the one to check.
3. A borrowed trailer with no agreement. Non-owned trailer coverage if his insurer offers it. Under the broker description above, it would not respond once he unhooks and leaves the trailer on a lot.

Same tractor, three different physical damage questions. Liability is a separate question: the MCS-90 endorsement responds to the public "regardless of whether or not each motor vehicle is specifically described in the policy", but how the policy itself treats each trailer is in its wording. Liability is covered on the trucking liability page.

Questions to ask before you hook up

• Which trailers are listed on my policy, at what stated values?
• Do I have trailer interchange, non-owned trailer coverage, or both, and with what limits and deductibles?
• Does the coverage apply when the trailer is unhooked or parked?
• Do my interchange agreements name trailer values above my limit?
• If I am leased on, what does the lease say about damage to the carrier's trailer, and what is charged back?

For the other lines on a tractor policy, see the commercial truck insurance guide, and use the planner on the home page to build your list.

FAQ

Does my physical damage policy cover a trailer I don't own?

Not as a rule. Progressive says exchanged trailers require separate insurance coverage because your physical damage insurance doesn't cover them. That is the gap trailer interchange and non-owned trailer coverage fill.

What is a trailer interchange agreement?

A written contract that transfers a trailer from one trucker to another to complete a shipment. Progressive describes it that way and notes that the trucker in possession is typically responsible for damage while holding the trailer. The agreement is what triggers trailer interchange coverage, so keep a signed copy.

Do I need trailer coverage if I am leased onto a carrier that supplies the trailer?

Read the lease. Under 49 CFR 376.12(j)(1), the lease must specify who provides insurance beyond the carrier's public liability, and the amount of any charge-back to you. If the lease makes you responsible for damage to the carrier's trailer, you need coverage for it. See leased onto a carrier.

Related

• Commercial truck insuranceCommercial truck insurance for one semi, box, dump, hotshot or farm truck: what weight, radius, cargo and authority change and who requires each line.
• Physical damageSemi truck physical damage insurance explained: collision vs comprehensive, stated value, deductibles, lender rules, and why a carrier policy leaves it out.
• Leased onOwner operator insurance requirements on a lease: what 49 CFR 376.12 puts on the carrier, what you still buy, charge-backs and questions to ask first.

Updated October 20, 2026