General liability vs auto liability: where the gaps hide
Most carriers know the truck needs auto liability and the yard needs general liability. The trouble sits in the seams: which one the law requires, how each limit runs out, and the claims each policy hands to the other.
Written by Rigo Diaz
Two liability policies at a glance
General liability vs auto liability comes down to what caused the loss. Auto liability pays others for injury or damage resulting from the ownership, maintenance, or use of your trucks, and federal law requires it. General liability covers your premises and operations, excludes your trucks, and is required only by contracts.
Both policies pay other people for injuries and damage you cause, which is why carriers mix them up. The standard forms are written to fit together, with each one handing certain claims to the other. Gaps open when a contract, an endorsement, or a late claim report breaks that fit.
I spent more than six years in risk management before I founded Simplex, and I have led it for more than 25 years. This guide covers the auto side, the rules, the limits, and the handoffs. For everything general liability itself covers, read our guide to CGL insurance for truckers.
The full briefing, read aloud
8 chapters. Select one to jump to it.
Generated with AI text-to-speech from this article's key insights, in order, rather than reading it word for word. Chapter times come from a transcript of the audio. The article itself was written and reviewed by Rigo Diaz.
Key takeaways
The cause decides the policy
Both pay others for bodily injury and property damage. Auto liability answers when a covered auto caused it; general liability answers for premises and operations.
Only auto liability is federal law
For-hire interstate carriers need at least $750,000 for general freight in vehicles of 10,001 pounds or more. FMCSA sets no general liability requirement.
Limits work differently
The standard auto limit applies per accident with no annual aggregate. General liability limits sit inside aggregates that reset each policy year.
Negligent hiring belongs to auto
The CGL auto exclusion applies even when a suit alleges negligent hiring, training, or supervision of the driver involved.
Contracts name the policy
Limits and endorsements are required policy by policy. A certificate with the right limit on the wrong policy doesn't meet the contract.
In this articleContents
What is the difference between general liability and auto liability?
The difference is what caused the loss. Both policies pay damages you legally owe others for bodily injury or property damage, and both pay for your defense. Auto liability answers when the loss results from the ownership, maintenance, or use of a covered auto.
General liability answers for your premises and operations, and its auto exclusion removes injury or damage arising from any auto owned or operated by, or rented or loaned to, any insured. So both policies cover property damage and bodily injury, each for a different cause.
| Question | Auto liability | General liability |
|---|---|---|
| What triggers it | An accident resulting from the ownership, maintenance, or use of a covered auto | An occurrence at your premises or from your operations, plus personal and advertising injury |
| Required by FMCSA? | Yes, for for-hire interstate and hazmat carriers | No |
| How it is proven | MCS-90 endorsement, plus an FMCSA filing for for-hire authority | Certificates and endorsements your contracts ask for |
| How the limit works | Per accident, with no annual aggregate in the standard form | Per occurrence, inside annual aggregates |
| Loading and unloading | Included, by hand, hand truck, or a device attached to the truck | Excluded, except movement by an unattached device such as a forklift |
Most disputes at the dock turn on that last row. Our CGL guide for truckers walks through it claim by claim, so this guide stays on the auto side and the handoffs.
What is auto liability insurance for a trucking company?
Auto liability insurance pays all sums an insured legally must pay as damages because of bodily injury or property damage caused by an accident and resulting from the ownership, maintenance, or use of a covered auto. In the ISO Business Auto Coverage Form, the insurer also has the right and duty to defend you, until the limit is used up paying judgments or settlements.
Which vehicles count is set by the symbols on your declarations page, covered in our guide to commercial auto symbols. Three more parts of the form matter to a carrier:
- Who is an insured. You, anyone using a covered auto you own, hire, or borrow with your permission (with exceptions, such as the owner you hired it from), and anyone liable for an insured's conduct, to the extent of that liability.
- Supplementary payments. The insurer's defense expenses, court costs, interest after a judgment, and up to $2,000 for bail bonds after a covered accident. None of them reduce the limit.
- Covered pollution cost. Cleanup costs when the same accident also causes covered injury or damage, such as fuel escaping from the truck's own tank. Pollutants in the cargo you haul are largely excluded.
What doesn't auto liability cover?
Not your own truck, your freight, or your people. The form excludes property you own, transport, or have in your care, custody, or control, injury to your employees, and obligations under workers' compensation law. Damage to your own truck needs physical damage coverage.
It also stops at the edges of the trip. Handling property before it moves from the place you accepted it, or after it reaches the place of final delivery, is excluded. So is moving property with a mechanical device other than a hand truck, unless the device is attached to the covered auto.
Which one does the law require?
Federal law requires auto liability, not general liability. Under 49 CFR 387.7, a carrier may not operate a motor vehicle until the minimum financial responsibility in 387.9 is in effect: $750,000 for for-hire general freight in vehicles of 10,001 pounds or more, and $1 million or $5 million for many hazardous materials. The rule covers for-hire carriers hauling property interstate and carriers of hazardous materials.
Proof is an MCS-90 endorsement kept at your principal place of business, and the policy can be cancelled only on 35 days' written notice. Carriers with for-hire authority also need their insurer's filing with FMCSA, on Form BMC-91 or BMC-91X, and FMCSA says the filing must stay on file to avoid revocation proceedings.
FMCSA's filing chart has no line for general liability. When you need it, a contract is asking.
Who asks for general liability?
Shippers, brokers, facilities, and equipment providers. The intermodal interchange agreement run by the Intermodal Association of North America is a clear example: its UIIA insurance requirements call for general liability of $1 million per occurrence, with no portion self-insured, and auto liability with a $1 million combined single limit.
They also say which policy carries what. Every UIIA equipment provider you work with must be an additional insured on your auto liability, only some must be on your general liability, and an auto policy covering only owned or only scheduled trucks is not accepted.
What if you are leased to a carrier?
Your lease sets the split. Federal leasing rules require it to state the carrier's obligation to insure for the protection of the public, and who provides any other insurance for the leased equipment, such as bobtail coverage (49 CFR 376.12(j)). Our guide to in-service liability for leased trucks covers the carrier's side, and non-trucking liability covers you off dispatch.
How do auto and general liability limits work?
Auto liability limits apply per accident; general liability limits also cap each policy year. The Business Auto limit is the most the insurer pays for all damages and covered pollution costs from any one accident, regardless of the number of trucks, insureds, claims, or vehicles involved. The standard form has no annual aggregate.
The ISO CGL form sets an each-occurrence limit inside a general aggregate, a separate products-completed operations aggregate, and a personal and advertising injury limit. The aggregates apply to each annual period, so a bad year at the yard can use them up, while the standard auto limit is available again for the next accident.
In both standard forms, defense costs are paid on top of the limits, not out of them. Endorsements can change any of this, so read your declarations and the forms attached to them.
Do two policies from the same insurer add up?
Not always. Under the Business Auto form, if it and another policy issued by the same insurer or an affiliate apply to the same accident, the most paid under all of them is the highest single limit. The exception is a policy written specifically as excess over the auto form, so ask how your umbrella or excess layer is written.
Which claims fall between general and auto liability?
Most claims land cleanly on one side. The ones that don't involve the people behind the truck, vehicles that aren't yours, and vehicles parked at your place.
Negligent hiring claims after a crash
A suit after a serious crash can add counts that you were negligent in hiring, training, or supervising the driver. The CGL auto exclusion applies even when a claim alleges negligent supervision, hiring, employment, training, or monitoring, if the occurrence involved an auto owned or operated by, or rented or loaned to, any insured.
Those counts belong to the auto policy, so send every suit from a crash to your auto insurer, whatever it alleges. The records that defend them live in your driver qualification files.
Rented, borrowed, and employees' vehicles
General liability won't pick these up. Its auto exclusion reaches autos operated by, rented, or loaned to any insured, and your employees are insureds while doing your work. A rented box truck, a borrowed pickup, or an employee's own car on a parts run needs hired auto (symbol 8) and non-owned auto (symbol 9) coverage on the auto side.
Other vehicles parked at your premises
Here general liability can respond. Its auto exclusion does not apply to parking an auto on, or on the ways next to, premises you own or rent, if the auto is not owned by, rented, or loaned to you or the insured. IRMI points to employee parking areas and outside trucks waiting on site to load or unload.
How do you keep general and auto liability from leaving a gap?
Treat them as one program reviewed together, at every renewal and every new contract.
Step 1: Match each contract term to a policy
List every limit and endorsement in your shipper, broker, lease, and interchange agreements, and write down which policy it belongs to. A certificate showing the right limit on the wrong policy doesn't meet the contract.
Step 2: Endorse both policies
Additional insured and waiver of subrogation are separate endorsements on each policy. ISO's auto waiver, CA 04 44, is written for the Business Auto and Motor Carrier forms, as a City of Riverside sample shows beside the general liability endorsements it also requires.
Step 3: Cover the vehicles you don't own
Confirm hired and non-owned autos on the auto policy if anyone rents, borrows, or drives a personal vehicle for the business. General liability won't pay for those accidents.
Step 4: Report to both insurers when unsure
The auto form requires prompt notice of an accident and says the insurer owes no coverage without full compliance with those duties. The CGL form requires notice of an occurrence as soon as practicable. Neither lets you make a payment or take on an obligation without consent, except at your own cost, so report a doubtful claim to both.
How Simplex helps you line up both policies
We place auto and general liability side by side, match them to your contracts, and keep the records that defend a claim.
Auto liability and filings
We place commercial auto liability for trucking companies, with the MCS-90 and FMCSA filings, certificates, and renewals handled in-house.
General liability beside it
Our trucking general liability coverage is placed with the rest of your commercial truck insurance, so the two policies are reviewed together.
Records behind a defense
Our DOT safety compliance team keeps driver qualification files, the accident register, and the other records a negligent hiring claim tests.
Frequently asked questions
What is auto liability insurance?+
Which insurance covers both property damage and bodily injury?+
Does general liability cover negligent hiring claims after a truck crash?+
Does auto liability have an aggregate limit?+
Do trucking companies need both general and auto liability?+
Where this information comes from
The rules below come from federal regulation, FMCSA, the standard ISO policy forms, and the UIIA's published requirements, all checked on October 20, 2026. Your own policy's forms and endorsements decide any real claim.
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1
eCFR — 49 CFR 387.7
No operation without required financial responsibility; 35-day cancellation notice; MCS-90 kept at the principal place of business.
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2
eCFR — 49 CFR 387.9
Minimum public liability levels: $750,000 general freight, $1 million and $5 million for hazardous materials.
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3
FMCSA — Insurance Filing Requirements
BMC-91 and BMC-91X filings, revocation risk, and a filing chart with no general liability line.
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4
ISO CA 00 01 10 13 — Business Auto Coverage Form
Auto liability insuring agreement, insureds, supplementary payments, exclusions, per-accident limit, duties, and the same-insurer condition (County of Sonoma copy).
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5
ISO CG 00 01 04 13 — Commercial General Liability Coverage Form
The auto exclusion and its negligent hiring language, the parking exception, aggregates, and notice duties (County of Sonoma copy).
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6
IANA — UIIA Insurance Requirements
$1 million general liability per occurrence, $1 million auto CSL, and additional insured rules for each policy.
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7
IRMI — Implications of the CGL Auto Exclusion
How the standard forms fit together, the parking exception, and the risk of an absolute auto exclusion endorsement.
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8
eCFR — 49 CFR 376.12
Leases must state the carrier's public liability obligation and who provides other insurance.
Written by
Rigo Diaz
Founder & CEO, Simplex Group
Founder and CEO of Simplex Group, with more than 25 years leading the company and helping trucking entrepreneurs navigate compliance, insurance, and the day-to-day demands of running a carrier. Before founding Simplex, he spent more than six years in risk management, experience that continues to shape how he approaches insurance, compliance, and carrier risk today.
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Buy them together, read them together
Auto and general liability are designed to meet in the middle. Contracts, endorsements, and late notice are what pull them apart, and all three are in your control.
If you want both policies checked against your contracts and your operation, talk to our team.