Motor truck cargo insurance: what it pays, what it leaves out, and what brokers check

Motor truck cargo is an inland marine coverage for loss of property in the course of transit. A carrier usually buys it as legal liability coverage: it pays what you are legally liable for when freight in your care is lost or damaged.

You need it because your auto policy will not pay for the load. The ISO Motor Carrier Coverage Form excludes property damage to property owned or transported by the insured or in the insured's care, custody or control. Your liability policy pays for the car you hit. It does not pay for the 40,000 pounds of product behind you.

Federal filings rarely force the issue. FMCSA's cargo security rule applies to household goods carriers: $5,000 for loss on any one vehicle and $10,000 for loss at any one time and place (49 CFR 387.303(c)), filed on Form BMC-34. Texas mirrors those household goods amounts for intrastate movers and takes cargo filings on Forms H and I. A general freight carrier has no government cargo minimum. The real requirement is in your broker-carrier agreement and your shipper contracts, and the amount they ask for is a business term, not a law. See how much cargo insurance brokers require.

For interstate shipments, the Carmack Amendment (49 U.S.C. 14706) makes the carrier liable for the actual loss or injury to the property. That is often the full value of the load, not what you were paid to haul it.

Carmack also lets a carrier limit liability to a value set by the shipper's written or electronic declaration, or by written agreement, if the value is reasonable under the circumstances (household goods have separate rules). And it sets floors: a carrier cannot give a shipper less than 9 months to file a claim or less than 2 years to sue, measured from written notice that the claim was disallowed.

Two practical consequences:

1. Your contracts can increase your exposure. Many broker agreements waive released rates and make you liable for full value, or add liability for things like delay or rejected loads that a cargo policy may not cover. Have an attorney review those clauses, then check them against your policy. The broker agreement decoder flags the insurance terms.
2. Your limit has to fit your freight. A $100,000 cargo limit on a load of electronics or pharmaceuticals worth far more leaves you personally exposed for the difference.

There is no single standard trucking cargo form. Each insurer writes its own, and the differences between them are larger than in auto liability. These are the provisions we read first.

Commodity exclusions or limitations. Many policies list freight that is excluded or sublimited: alcohol, tobacco, electronics, pharmaceuticals, livestock, metals, high-value consumer goods and others. If you haul something on that list, the policy you are showing the broker may not cover the load you just booked.

Unattended vehicle conditions. Some forms limit or exclude theft from a truck left unattended, or require that it be locked, alarmed or parked in a secured lot. A driver taking a mandatory break at a truck stop can trigger the condition. See the unattended vehicle exclusion.

Theft conditions. Some forms cover theft only of the entire truck and load, or require visible signs of forced entry, or exclude "mysterious disappearance" and shortages found at delivery. See does cargo insurance cover theft.

Temperature loss. Spoilage from a failed refrigeration unit is often excluded unless you add reefer breakdown.

Scheduled equipment and territory. Some policies cover cargo only on scheduled power units or trailers, or only within a radius. A load on a borrowed trailer, or a run outside the listed radius, may fall out. See what is radius in truck insurance.

Loading, terminals and storage. Coverage while freight sits at your yard or terminal, overnight or over a weekend, is often limited. Ask how long and where.

When you lease owner-operators, federal leasing rules require the lease to state the conditions under which you can deduct cargo or property damage claims from the owner-operator's settlements, and you must give a written itemization before deducting (49 CFR 376.12(j)(3)). If you cover owner-operators under your cargo policy and charge them back for the deductible, put the terms in the lease.

If an owner-operator runs under your authority, your cargo policy generally needs to cover loads on their tractor too. Confirm whether the policy covers cargo on any unit you dispatch or only scheduled units. See leasing owner-operators insurance.

Brokers and onboarding platforms look at the cargo line on your certificate: insurer, policy number, dates and limit. Some ask for reefer breakdown to be shown, or for the broker to be listed as certificate holder. A certificate is a summary. It does not change the policy and does not show commodity exclusions or theft conditions.

If a broker rejects your packet for cargo reasons, the fix is usually one of three things: a higher limit, an endorsement (reefer breakdown, a specific commodity), or a corrected certificate. See carrier packet insurance rejected and what cargo insurance excludes.