TL;DR: Uninsured and underinsured motorist coverage pays for your driver's injuries when the at-fault motorist carries no insurance or limits too small for the harm. States decide whether insurers must offer it and whether you can reject it in writing. For truckers who live on the road, it is cheap protection against the other driver's empty policy.
What does uninsured motorist coverage actually do?
It reverses the direction of your liability policy. Liability pays people you hurt. Uninsured motorist coverage, UM, pays you and your drivers when someone else causes the crash and has no insurance to answer for it. Underinsured motorist coverage, UIM, does the same when the at-fault driver has some insurance but not enough for the injuries. For a trucker, the classic claim is simple: a private passenger car runs a light, totals your driver's health, and turns out to carry a state-minimum policy or none at all.
Why does this matter more for trucking than most businesses?
Exposure hours. Your drivers spend their working lives surrounded by the general driving public, and a meaningful share of that public is uninsured or minimally insured. Insurance Research Council studies have estimated roughly one in seven US drivers is uninsured, with much higher shares in some states. Car-versus-truck crashes often injure the trucker too, and the car's limits, when they exist, are sized for fender benders, not for a driver who cannot climb into a cab for a year.
Is uninsured motorist coverage required?
It depends on the state, and this is a place to be careful. Some states require UM coverage in auto policies, some require insurers to offer it and let the insured reject it in writing, and rules differ for commercial policies. The details, including whether rejection must be signed by a specific officer and whether limits can be lower than liability limits, are state law. Do not assume the answer travels with you across state lines; verify with your state insurance department and your agent how your policy handles it in your state of issue.
What does UM and UIM cover for a trucking operation?
| Loss | Covered by UM or UIM? |
|---|---|
| Driver's medical bills after an uninsured motorist's crash | Yes, bodily injury UM |
| Driver's lost wages and pain, within limits | Commonly yes, per state and form |
| Damage to your tractor from an uninsured driver | Only where UM property damage exists; otherwise physical damage coverage with your deductible |
| Hit-and-run driver injuries | Typically treated as uninsured, per form conditions |
Note the overlap with workers comp: an employee driver injured on the job has workers comp benefits first, and state law and policy terms govern how UM stacks with or offsets those benefits. Owner-operators without workers comp lean harder on UM, which is exactly why waiving it deserves real thought.
Should a trucking company reject UM to save premium?
Sometimes companies do, especially where workers comp covers all drivers, and the rejection is legal with a signed form. Before signing, price the coverage honestly: UM premium is small next to liability, and it is the only line that pays your people when the other driver's policy is empty. For owner-operators, who are their own safety net, rejecting UM usually saves little and risks much. Make the decision limit by limit, state by state, with the workers comp picture in front of you.
What should I check on my current policy?
Whether UM and UIM appear at all, at what limits, whether any rejection form was signed and by whom, how hit-and-run is defined, and how the coverage coordinates with workers comp. Fleets with drivers domiciled in several states should check each policy's governing state rules. Five minutes with the declarations page settles what a courtroom would otherwise settle later.
Real questions owner-operators and fleet managers ask
What is the difference between uninsured and underinsured motorist coverage?
Uninsured motorist coverage pays when the at-fault driver has no insurance or cannot be identified after a hit-and-run. Underinsured motorist coverage pays when the at-fault driver's limits are too small for the injuries. Policies commonly pair them, subject to state rules.
Is uninsured motorist coverage required on commercial truck policies?
State law decides. Some states mandate it, many require insurers to offer it with written rejection allowed, and commercial-policy rules can differ from personal auto. Confirm your state's requirement and whether any rejection form exists in your file before assuming you have or lack it.
Does workers comp make uninsured motorist coverage unnecessary?
Not automatically. Workers comp covers employee injuries first, but UM can respond for damages workers comp does not pay, subject to state offset rules. Owner-operators without workers comp rely on UM directly. Coordinate the two rather than assuming either replaces the other.
Does uninsured motorist coverage pay for damage to my truck?
Only where UM property damage coverage exists, which varies by state and form. Most truckers cover their equipment through physical damage coverage instead, paying their deductible and letting the insurer chase the uninsured driver for recovery.
How much uninsured motorist coverage should a trucker carry?
Match it to the human exposure: a seriously injured driver's medical and wage loss, not the other driver's typical limits. Many operations mirror their liability limit where state rules allow. The premium difference between low and meaningful UM limits is usually modest.
Why truckers work with Morrow
- We know the filings. Morrow reviews uninsured motorist options and rejection forms state by state so the choice is deliberate, not a default.
- New authority is our normal. First-year carriers pay the most and get declined the most. We work with markets that actually want new ventures and we tell you what the first renewal takes.
- Certificates and filings, fast. Certificates of insurance the same business day for most carriers, and federal or state filings submitted electronically so your authority is not sitting in a queue.
- We quote the whole picture. Liability, cargo, physical damage, and the endorsements shippers and brokers actually check for, priced together so nothing is missing when a load is on the line.
- Real people when something goes wrong. A claim, a lapse notice, or a lost certificate gets a person, not a portal.
Related trucking guides
Short answers to the surrounding questions truckers ask next.
- Trucking insurance at Morrow (start here)
- Primary auto liability for truckers
- Workers comp for trucking companies
- Physical damage coverage for trucks
- Owner-operator vs company driver coverage
- Commercial auto for trucking fleets
This guide is general information, not legal, tax, or insurance advice. Limits, forms, and deadlines change, so verify current requirements with your state insurance department before you rely on them. Morrow is a brand name of Afthonea Inc. Last updated: July 2026.