Quick answer: Motor truck cargo insurance covers the freight you haul against loss or damage. You pick a limit based on the value of what you carry, but every policy has exclusions — and one of the biggest is refrigeration breakdown. Standard cargo policies typically exclude spoilage from a reefer unit failure unless you add a reefer breakdown endorsement.
Motor truck cargo insurance is the coverage that pays when the freight in your trailer is damaged, destroyed, or stolen. It is required by most brokers and shippers before they will tender a load, and it is one of the most misunderstood policies in trucking — mostly because owner-operators focus on the limit and ignore the exclusions. Here is how to actually read a cargo policy.
At its core, cargo coverage protects the property of others while it is in your care, custody, and control during transport. Typical covered causes of loss include collision, overturn, fire, theft, and striking of a load. If your truck rolls and the freight is destroyed, or a thief takes your trailer, this is the coverage that responds — up to your limit and after your deductible.
It is worth stressing what cargo insurance is not: it does not cover your truck (that’s physical damage), it does not cover injuries to others (that’s liability), and it does not automatically cover every commodity or every cause of loss. It is a targeted policy with important boundaries.
Your cargo limit should reflect the maximum value of freight you realistically haul on a single load, plus a cushion. A $100,000 limit is a common starting point for general freight, but the “right” number depends entirely on what you carry. If you regularly move loads worth $150,000, a $100,000 limit leaves you personally exposed for the difference.
| Freight type | Limit consideration |
|---|---|
| General dry freight | Match limit to your highest-value typical load; $100,000 is a common baseline |
| Refrigerated / produce | Higher limits plus a reefer breakdown endorsement |
| High-value (electronics, pharma) | Higher limits; expect stricter underwriting and theft requirements |
| Auto / heavy equipment | Specialty limits and terms; verify covered commodities |
Also watch two often-overlooked numbers: your deductible (what you pay per claim) and any sublimits that cap payouts for specific perils like theft or for certain commodities. A high overall limit means little if theft is sublimited to a fraction of it.
Every cargo policy contains exclusions. These vary by insurer, but the ones that most often lead to denied claims include:
The lesson is simple: the limit tells you the ceiling, but the exclusions tell you whether you’ll be paid at all. Read them before you haul.
If you pull a refrigerated trailer, this section is the whole ballgame. Standard motor truck cargo policies generally exclude loss caused by a mechanical breakdown or failure of the refrigeration unit. So if your reefer quits on a load of produce and the whole trailer spoils, a bare cargo policy may deny the claim — because the cause of loss was the unit failing, not a covered peril like collision or theft.
To close that gap you add a reefer breakdown endorsement (sometimes called reefer malfunction coverage). It brings spoilage from refrigeration failure back into the policy, subject to its own conditions. Those conditions are strict and worth knowing:
Bottom line for reefer operators: if your policy doesn’t explicitly include reefer breakdown coverage, assume spoilage from a unit failure is not covered. Ask your agent to confirm it in writing.
FMCSA — Insurance Requirements
49 CFR 387.9 — Financial Responsibility (context on required coverages)
Thrive Risk Management makes sure your California cargo policy matches what you actually carry — right limit, right commodities, and reefer breakdown handled before a load spoils, not after. Driven by integrity.
Get a free quote at truckinginsuranceca.co or call (818) 356-8150.