This guide is general information for people who run or plan to run a container rental business. It is not insurance, legal or tax advice. Talk to a licensed insurance agent and an attorney before you buy a policy or write a contract.
What insurance does a portable storage company need?
Most portable storage companies carry a package of policies, not one. Each policy covers a different risk. The usual list is general liability, commercial auto, workers’ compensation, property, and inland marine. Some also add umbrella, cargo and surety bonds.
Here is a plain map of the risks and the policy types that agents usually discuss for each one.
| Risk | Policy type to ask about | What to confirm |
|---|---|---|
| A customer or visitor is hurt, or their property is damaged, because of your work | General liability | Limits, deductible, exclusions for delivery work |
| A truck or trailer has a crash | Commercial auto | Who is a covered driver, which vehicles are scheduled |
| An employee is hurt on the job | Workers’ compensation | Job classes for drivers, yard staff and office staff |
| Your yard, shop and office burn or are stolen | Commercial property | Covered location, valuation method |
| Containers at customer sites are stolen or damaged | Inland marine | Territory, valuation, new units auto-covered or not |
| Goods you haul are lost or damaged | Motor truck cargo | Cargo limits, excluded goods |
| One large claim exceeds your base limits | Umbrella | How it sits over general liability and auto |
The Hartford lists a “Portable Storage Containers” program on its program business page. It is meant for UNITS franchises or similar companies that deliver containers, and it carries a $10,000 minimum premium. This is one carrier’s program, not a standard. It shows that some insurers treat container delivery as its own class of risk.
NPSA’s member benefits page lists insurance products that are only available to members. Check the page for current offers and terms. Members should still compare any offer against a quote from their own agent.
How is inland marine different from property insurance?
Inland marine covers qualifying property that moves or sits away from your main location. Commercial property cover is built around a described location, such as your yard and office. A container on a customer’s driveway is not at your yard.
A Wexford Insurance article on dumpster fleets makes the same point. Its examples include theft, vehicle damage, fire, vandalism, storm damage and loss during loading or transport. Containers face the same list. The article also says many businesses need both policies, because they protect different things.
The name has nothing to do with boats. Policy terms matter more than the name. Ask your agent these questions about any inland marine form:
- Which causes of loss are covered, and which are excluded?
- How are containers valued: replacement cost, actual cash value, or an agreed amount?
- Does the territory cover every state and county where you place units?
- Are newly bought units covered automatically, or must you report them first?
- Does the schedule list every unit, including units on long-term rent?
- What is the deductible per unit and per event?
Count the whole fleet when you ask for a quote. Include units at customer sites, units on trucks and units in your yard. A schedule that lists only the yard units leaves a gap.
Who pays when a customer’s items are damaged?
The answer depends on the rental agreement, the cause of the loss and the policies in force. This is where operators need an attorney. A short, clear contract prevents most arguments.
Most rental agreements do not make the operator responsible for the customer’s contents. Customers load and lock their own units. Many agreements say the renter should insure the contents, and some operators offer an optional protection plan. One storage provider, Stomos Storage, lists optional insurance at $15 to $40 a month on its cost guide. That is one provider’s figure, and plans differ.
Two terms come up often:
- Bailment is when you hold someone else’s property in your care. If your business takes custody of customer goods, for example in a storage center or a moving-and-storage service, you may have bailee exposure. Ask whether you need warehouse legal liability or bailee coverage. These forms are not standardized, so read the exclusions.
- Damage waiver is a contract term. The provider agrees to limit what the renter owes if the unit is damaged. Treat it as a contract question first and an insurance question second.
If you offer a protection plan, ask your agent how it is insured and how it is described. State rules on selling protection plans vary. Do not copy another company’s wording without legal review.
Whatever you choose, tell the customer in plain words:
- What the rental fee does and does not include
- What the customer must insure
- What happens if the container is damaged or stolen
- How to report a loss, and how fast
Which policies matter most for delivery?
Commercial auto and general liability matter most when you deliver. A truck that sets a container is the highest-risk moment in the rental cycle. Crashes, property damage, and injuries to bystanders all start here.
Insureon publishes median costs from its trucking customers. The table below shows them. The page was last updated June 23, 2025, and it does not state which year the cost data covers. A container fleet is not the same as a trucking company, so use these as rough anchors only.
| Policy | Median per month | Median per year |
|---|---|---|
| Commercial auto | $816 | $9,794 |
| Workers’ compensation | $650 | $7,795 |
| Motor truck cargo | $129 | $1,553 |
| General liability | $51 | $606 |
| Surety bonds | $60 | about $720 |
Insureon says its figures are medians that exclude outlier premiums. It also says a typical general liability policy has $1 million per occurrence and $2 million aggregate limits with a $750 deductible. Your own quote will differ with your fleet, drivers, revenue and location.
If your trucks fall under federal motor carrier rules, insurance may be one of several compliance duties. FMCSA’s page on USDOT numbers says companies hauling cargo in interstate commerce with vehicles at or above a stated weight must register. See our guide on DOT, FMCSA and OSHA compliance for the thresholds. Check your state and local rules too.
What drives the price of coverage?
Fleet size, driver records, claims history, location, revenue and policy limits move the price. Insureon names these factors for its policies. Commercial auto cost depends on the number and value of vehicles, how often they are driven, driver records and vehicle type. Workers’ compensation depends on the number of employees and their job classes. Drivers cost more to insure than office staff.
You cannot control every factor. You can control some:
- Driver screening. Check motor vehicle records before you hire. Keep files current.
- Training. NPSA runs a training video library with safety and human resources topics. Insurers often ask what training you give.
- Equipment condition. Keep inspection and repair logs for trucks and tilt beds.
- Yard security. Fences, lighting and cameras reduce theft claims.
- Clean paperwork. Signed rental agreements, delivery photos and damage reports help when a claim comes in.
- Claims history. Report incidents quickly and keep records of how you resolved them.
OSHA’s help page for employers reminds readers that under the Occupational Safety and Health Act, employers must provide a safe workplace. A good safety program supports your insurance story and your workers.
How do I get quotes and compare them?
Use a licensed commercial agent, give each carrier the same facts and compare the quotes line by line. Agents who write for equipment rental, trucking or specialty programs will understand your exposure faster than a general agent.
Prepare this information before you call:
- Number of containers, trailers and mobile offices, with values.
- Number of trucks, their types and their weight ratings.
- Number of drivers and their motor vehicle records.
- Annual revenue and payroll by job class.
- Where you place units: states, counties, and any special sites such as ports or job sites.
- Your standard rental agreement and any protection plan wording.
- Claims history for the past several years.
Then compare the quotes on more than price. Use this checklist:
| Compare | Why it matters |
|---|---|
| Limits and deductibles | A low premium can hide a high deductible |
| Valuation method | Replacement cost and actual cash value pay very differently |
| Exclusions | Delivery operations, mobile offices and modified units may be excluded |
| Territory | Does it cover every state where you place units? |
| Additional insured and certificate of insurance | Landlords, lenders and job sites often ask for a certificate |
| Claims service | Ask how a typical claim is handled and how long it takes |
A certificate of insurance is a document that proves you hold a policy. Customers, general contractors and property owners may ask for one before you place a container on their site. Ask your agent how fast you can get certificates and how to name an additional insured.
Do not guess when you answer application questions. A wrong answer about your fleet, drivers or operations can cause a claim to be denied. If your business changes, tell your agent. Adding modified units, mobile offices or long-distance moves can change the risk.
How can NPSA help?
NPSA is the trade association for companies that rent, sell or lease portable storage. Members can also use the community forum, which has a safety category, to ask peers what questions their agents raised.
Peers can tell you how they structured protection plans, which carriers understand container delivery and what claims taught them. They cannot give you legal or insurance advice. Use them to build better questions for your own agent and attorney.
Next step
If you run a portable storage company or supply one, see what NPSA membership includes and how to join on the join page.