Motor truck cargo is one of the most assumed and least understood coverages in trucking. Carriers treat it as blanket protection for any load. It is not. It covers what the policy describes, and the gaps are where claims die.
Commodity matters
Cargo policies are written around what you haul. Many exclude or sharply limit certain commodities, electronics, alcohol, tobacco, pharmaceuticals, and treat specialized freight like refrigerated goods or vehicles differently. If your policy was written for general freight and you take a load it excludes, that load can be uncovered even though you carry cargo insurance.
The limit has to match the load
A cargo limit that is fine for routine freight can fall far short on a high-value load. When the load is worth more than your limit, you collect only up to the limit and eat the rest. Carriers who haul varied freight need a limit, and sometimes scheduled higher limits, that match the most valuable loads they actually take.
Conditions and exclusions
Beyond commodity and limit, cargo policies carry conditions: securement, refrigeration maintenance for reefer, theft and unattended-vehicle provisions. A claim can be denied not because the commodity was excluded but because a condition was not met. Reading these against how you actually operate is essential.
Reefer and auto-hauling
Two operations deserve special attention. Refrigerated freight needs reefer breakdown coverage, since standard cargo often excludes spoilage from a unit failure. Auto-hauling is often excluded or limited on standard forms and needs coverage written for vehicles. Both are common, expensive gaps.
The fix is straightforward: have your cargo coverage read against the commodities and values you actually haul, and the contracts you sign. A coverage review does exactly that, and it is the cheapest insurance against a denied cargo claim.