Trucking liability insurance: what it pays and how much you need
Trucking liability insurance, also called primary auto liability, pays for injuries and property damage you cause to other people while operating your truck. For a for-hire interstate carrier hauling general freight in a truck rated 10,001 lb or more, federal law requires at least $750,000, and your insurer must file proof with FMCSA.
Contents
- What does trucking liability insurance cover?
- What are the federal minimum liability limits?
- Combined single limit or split limits?
- $750,000 or $1,000,000?
- Filings and the MCS-90: what your insurer does for your authority
- Leased onto a carrier: whose liability policy applies?
- What does trucking liability cost?
- Checklist before you sign a liability policy
- Sources
- FAQ
The short version
- It covers third parties only: not your truck, your cargo or your own injuries.
- Federal minimums range from $300,000 (for-hire, under 10,001 lb) to $5,000,000 (certain hazmat).
- Broker and shipper agreements can ask for more than the legal minimum: read yours.
- The MCS-90 endorsement protects the public, not you: the insurer can recover from you what the policy would not have paid.
What does trucking liability insurance cover?
Progressive describes commercial vehicle liability as two coverages combined: bodily injury and property damage. If you are at fault in a crash, it can pay:
- medical bills and other injury damages of the people you hurt, including other drivers, passengers and pedestrians;
- repair or replacement of property you damage: other vehicles, guardrails, buildings, signs;
- your legal defense when you are sued over a covered accident.
Triple-I adds an important limit on that last point: the insurer's duty to defend or settle "ends when the insurance policy limits are exhausted". A judgment above your limit is yours to pay.
What it does not cover
Liability is third-party protection. Progressive lists what it leaves out: damage to your own vehicle, injuries to your own drivers, and cargo. For a one-truck operation, that means three separate decisions: physical damage on your truck, motor truck cargo for the freight, and occupational accident for your own injuries. Accidents that are not caused by driving, such as a visitor hurt at your yard, belong to general liability.
Triple-I also notes that in several states the law does not allow a business auto policy to cover punitive damages, and that even where it is allowed, your policy may exclude them.
What are the federal minimum liability limits?
Under 49 CFR 387.7, no for-hire carrier subject to the rules may operate a truck until it has the minimum financial responsibility of 49 CFR 387.9 in effect. The amounts depend on what you haul and on the vehicle's weight rating.
| Carrier and cargo | Weight rating | Minimum |
|---|---|---|
| For-hire, property (non-hazardous), with operating authority | Under 10,001 lb | $300,000 (387.303T) |
| For-hire, property (non-hazardous), interstate | 10,001 lb or more | $750,000 |
| Oil and hazardous materials not in the $5M tier | 10,001 lb or more | $1,000,000 |
| Bulk hazardous substances, bulk explosives (Div. 1.1-1.3), certain poison gases, highway-route-controlled Class 7 | 10,001 lb or more | $5,000,000 |
| The same high-hazard materials | Under 10,001 lb | $5,000,000 |
The hazmat tiers apply to private carriers too, and some apply intrastate. The full schedule, with the filing forms, is on our page about motor carrier insurance requirements. An FMCSA technical rule of July 21, 2026 corrected wording in the hazmat tier but changed no dollar amount.
State minimums for intrastate trucks
A truck that never leaves its state for business follows state law instead. Three examples, each with its own conditions:
- Texas: TxDMV requires $500,000 for private or for-hire carriers over 26,000 lb, and $1,000,000 or $5,000,000 for hazmat. See commercial truck insurance in Texas.
- California: the DMV motor carrier handbook (2016 edition) lists $750,000 combined single limit for property in vehicles of 10,001 lb or more, and $300,000 under that weight for for-hire carriers.
- Florida: state law sets $50,000 to $300,000 combined limits by vehicle weight, but trucks subject to the federal rules must carry the federal amounts.
Combined single limit or split limits?
A liability limit can be written two ways. Split limits set separate caps for bodily injury per person, bodily injury per accident and property damage per accident. Progressive gives the example of 15/30/10: $15,000 per injured person, $30,000 for all injuries, $10,000 for property damage. A combined single limit (CSL) puts injuries and property damage under one amount per accident.
Trucking liability is usually discussed as a CSL, and the federal minimums are single amounts for "public liability". With a $750,000 CSL, a crash causing $500,000 of injuries and $200,000 of property damage stays within the limit, whatever the split between the two. On Progressive's liability page, you can see both structures described side by side.
$750,000 or $1,000,000?
$750,000 is the legal floor for general freight; it is not necessarily what you will be asked for. Progressive, describing its own rating, says trucks need "a minimum combined single limit (CSL) of $750,000 or $1 million depending on cargo and vehicle type". Separately, many broker-carrier agreements ask for more than the federal minimum. How often they do is not something we can put a number on: the only reliable answer is the agreement in front of you.
Before choosing a limit, collect the carrier packets of the brokers and shippers you expect to work with and note the liability limit each one asks for. Your limit has to meet the highest of those numbers and the legal minimum for your cargo.
Excess and umbrella layers
When a contract or your own risk tolerance calls for more than your primary limit, an excess or umbrella policy can add a layer on top. It pays only once the primary limit is used up. Triple-I warns against relying on a personal umbrella for claims arising from business use of a vehicle: you need a commercial policy. ATRI's 2026 insurance study, which surveyed motor carriers of all sizes, found that the cost of the $5-10 million excess layer rose 34% to 1.58 cents per mile; few one-truck operations buy layers that high, but the figure shows how quickly excess prices have moved.
Filings and the MCS-90: what your insurer does for your authority
FMCSA does not accept a certificate from you. When you apply for operating authority, your insurer files proof on Form BMC-91 or BMC-91X. If the filing is not made within 20 days of your application's publication in the FMCSA Register, FMCSA serves a decision giving you 60 days to comply before dismissal. Names and addresses must match your application exactly.
The policy also carries the MCS-90 endorsement. FMCSA says it is not issued for individual vehicles but attached to the carrier's liability policy, applying to all vehicles under that policy subject to the federal rules (FMCSA, Form MCS-90). It guarantees payment of a final judgment for public liability up to the federal minimum, even if the policy itself would not have paid, for example because the truck was not listed. The catch for you: the form requires the carrier to reimburse the insurer for any payment it would not otherwise have had to make. Our page on the MCS-90 endorsement explains the details.
The MCS-90 is not extra coverage. A claim that falls outside your policy but is paid under the endorsement becomes a debt you owe your insurer.
Leased onto a carrier: whose liability policy applies?
When you are leased onto a carrier, 49 CFR 376.12 gives the carrier exclusive possession and complete responsibility for operating the equipment during the lease, and the lease must state the carrier's obligation to maintain public liability coverage. Progressive notes that a carrier typically covers primary liability while you are under dispatch.
The gap is everything outside dispatch: driving home, to the shop, or personal trips. That is the job of bobtail or non-trucking liability, which insurers define differently. Our page on leased owner-operator insurance covers what the lease must say, including charge-backs.
What does trucking liability cost?
There is no official average premium for one-truck operations. The industry benchmark comes from ATRI: across the carriers in its May 2026 study, liability premiums rose 18.6% from 2021 to 2024, to 10.2 cents per mile, while per-mile liability losses among respondents rose an average of 33.1% (ATRI release). The release gives no owner-operator figure.
Example, not a quote: applying the 10.2-cent average to a truck running 100,000 miles a year gives $10,200 of liability premium. A new authority, a long radius or a poor inspection record can put a single truck well away from that average, in either direction. The factors are explained in semi truck insurance cost.
Checklist before you sign a liability policy
- The limit meets the legal minimum for your heaviest cargo class and the highest limit in your broker and shipper agreements.
- Every power unit you run is listed, with the right radius and commodities.
- The insurer has filed the BMC-91 or BMC-91X in the exact legal name on your authority application, and has confirmed it to you in writing.
- You know which drivers are excluded, if any, and never let an excluded driver take the truck.
- If you lease on, you have a written answer on who covers you off dispatch.
To see how liability fits with the other lines a single truck may need, read our overview of trucking insurance coverages.
Sources
- 49 CFR 387.9, Financial responsibility, minimum levels, eCFR, consulted October 20, 2026.
- Form MCS-90 endorsement, FMCSA, consulted October 20, 2026.
- Commercial auto liability coverage, Progressive Commercial (insurer), consulted October 20, 2026.
- New ATRI Research Analyzes Motor Carrier Responses to Rising Insurance Costs, ATRI, May 19, 2026, consulted October 20, 2026.
FAQ
Does trucking liability cover my truck if I cause the accident?
No. Liability pays for the other party's injuries and property. Repairs to your own truck come from physical damage coverage (collision), if you carry it.
Can I lower my liability limit to the minimum to save money?
Legally you can carry the minimum that applies to your cargo, for example $750,000 for general freight. In practice, check every broker and shipper agreement first: if one asks for a higher limit, carrying less can cost you the load or put you in breach of the contract. And any claim above your limit is not paid by the insurer.
Is primary liability the same as non-trucking liability?
No. Primary liability is the main policy that covers a carrier's trucks while they operate in its business. Non-trucking liability is a separate policy that leased owner-operators buy for use of the truck outside the carrier's business. Insurers define it and bobtail differently, so read the wording; see bobtail insurance.
How long does an insurer need to cancel my liability policy?
Under 49 CFR 387.7, a policy used for federal financial responsibility stays in effect until terminated, and cancellation requires 35 days' written notice from the insurer or the carrier to the other. The FMCSA filing itself cannot be withdrawn until 30 days after written notice to FMCSA (387.313T).
Related
- CoveragesTrucking insurance coverages for one truck: what each line pays for, whether the law, a broker, a lender or a lease requires it, and the order to buy them.
- MCS-90The MCS-90 endorsement explained: who needs it, what the insurer guarantees to the public, its exclusions, and why the reimbursement clause matters to you.
- Semi truck insurance costSemi truck insurance cost from Progressive's 2025 averages and ATRI's cents-per-mile data, the factors behind your price, and a worked per-mile example.
Updated October 20, 2026