Liability pays the other guy. It does nothing for your truck. Physical damage insurance is what repairs your own tractor and trailer after a wreck, fire, or theft, and the way you set it up decides what the check looks like on the worst day of your year.
Most owners pick an insured value and a deductible once, when the truck is new, and never touch them again. The truck ages, the loan balance changes, the market moves. This piece is about setting those two numbers on purpose, and knowing what the policy will do before you have to use it.
Physical damage in one paragraph
Physical damage is two coverages on your own equipment. Collision pays when the truck overturns or hits something. Comprehensive pays for most of the rest: theft, fire, vandalism, hail, flood, animal strikes. FMCSA does not require it for interstate authority, but your lender almost certainly does. For the full rundown on what each part covers, see our physical damage coverage page.
Stated amount vs. actual cash value: what each pays on a total loss
When a unit is totaled, the policy pays one of two basic ways.
Actual cash value is what the truck was worth on the day of the loss. Think replacement cost for a comparable unit, minus depreciation for age, miles, and condition. A seven-year-old truck with 750,000 miles does not settle like a two-year-old one, no matter what you owe the bank.
Stated amount is a number you set when the policy is written. It is the most the policy will pay for that unit, and your premium is built on it. Read that as a cap, not a promise. Many commercial forms pay the lesser of the stated amount, the actual cash value, or the cost to repair or replace. Ask your agent to point at the valuation clause in your form and say which rule it uses. Two minutes of reading beats learning this at settlement time.
A third way, agreed value, locks in a number ahead of the loss with no depreciation math at the end. Carriers usually want photos, an inspection, or receipts first, and some limit it to newer or well-documented units. If you can get it, it takes the valuation argument off the table.
Why overstating or understating the value works against you
Overstate and you pay premium on money you cannot collect. Insure a truck for $160,000 that later settles at $95,000 actual cash value, and the extra premium bought nothing.
Understate and the bill looks great until the truck burns. The policy pays at most the low number you set. You cover the gap to replace the unit, and maybe the leftover loan balance too.
Understating hides its damage. Partial losses get repaired the same either way, so nothing seems wrong for years. The problem only shows up on the total loss.
So price the truck the way a buyer would. Pull dealer and auction listings for your year, spec, and mileage, and redo the number at each renewal. If you put big money into the unit, like an in-frame overhaul or a new APU, keep the receipts. They back you up when you ask for a higher value.
Choosing a deductible: cash on hand vs. premium
The deductible is your share of each claim before the policy pays. Raise it and the premium drops. The question is how much you can stand.
Here is a rule that holds up: set the deductible at the largest check you could write tonight without wrecking your cash flow. Not the largest check you could write eventually.
A deductible you cannot cover gets paid with a credit card, a skipped payment, or a truck sitting dead until you find the money. All three cost more than the premium saved.
Check two more things on your physical damage insurance. Deductibles usually apply per coverage and per unit, so one wreck can pull two of them if both your tractor and a separately covered trailer are damaged. And your lender may cap how high you can go, which is next.
Lienholder and lease requirements: loss payee, required deductibles, proof of coverage
If there is a loan on the truck, the lender goes on the policy as loss payee. After a total loss, the settlement goes to them first, up to the balance owed. Whatever is left comes to you. That order catches people every year.
Lenders set rules too. Most require comp and collision with the deductible under a cap, often $1,000 to $2,500. Raise your deductible past their cap without asking, and you can be in default on the loan even with the policy in force.
Leases work much the same. A lease-purchase or carrier lease often names the lessor as loss payee and requires physical damage at their deductible cap, on their timeline.
Proof matters as much as coverage. When the policy renews or changes, the lender wants a fresh certificate or declarations page. Let that lapse and they can buy force-placed insurance on your loan and bill you for it, at numbers that make normal premium look cheap.
One last check: the loss payee block has to spell the lender exactly right. Wrong name on the check, delayed settlement.
Physical damage vs. cargo vs. liability: who gets paid after one accident
One rear-end collision can run three policies at once, and each pays a different person.
Liability pays the people you hit: their truck, their freight, their injuries. This is the coverage FMCSA requires for interstate authority, and the base of any trucking insurance policy.
Physical damage insurance pays you, for your tractor and your trailer.
Motor truck cargo pays the shipper whose freight was in your box. Shippers and brokers usually demand it before you load, often at $100,000 a load.
Run the chain. You hit a car, your hood folds, the reefer load spoils. Liability fixes the car, physical damage fixes the hood, and cargo replaces the load. Your deductible can come due on more than one of them from one bad afternoon, which is one more reason to size each one with care.
Common gaps: permanently attached equipment, non-owned trailers, towing and rental
Permanently attached equipment is the quiet one. Liftgates, wet kits, headache racks, custom sleepers. Some policies fold them into the stated amount. Some want them listed by name. Some exclude them unless you endorse them on. Ask your agent in writing which applies to your truck, and get additions made before you need them, not after.
Tools are not covered. Chains, binders, straps, tarps, and personal property are not part of the truck, and physical damage does not touch them.
Non-owned trailers are their own world. Your physical damage covers your trailer. Pull someone else's under a trailer interchange agreement and the damage lands on you, answered by trailer interchange coverage, with its own limit and often its own deductible. Regularly pull trailers you do not own with no interchange paperwork? Ask about non-owned trailer coverage.
Towing and rental get confused for each other. Towing after a covered loss is usually part of the loss settlement itself. Roadside service and getting the truck home is an endorsement or a separate program. Rental reimbursement pays toward a rental tractor while yours sits in a shop, and downtime coverage can pay a set amount per day when a covered loss idles you. If a week off the road would hurt, price them.
What to check on your declarations page today
Pull the dec page, the summary at the front of your policy, and look for these.
- Stated amount on each unit, against what that unit sells for today
- Comp and collision deductibles per unit, and whether glass or theft carry different ones
- Loss payee names and addresses, spelled the way the lender spells them
- Trailer interchange, rental reimbursement, and roadside: present or missing
- Every unit you are running, including the one you picked up last month
Then ask your agent two questions. Does my policy pay the stated amount, or the lesser of that and actual cash value? And where is my valuation clause? A ten-minute call now beats a short check later.
We go deeper on pieces of this every month on the Full Coverage blog.
Ready to set your numbers on purpose instead of by default? Start at myfullcoverage.com/quote.