Updated March 2026
What Is Uninsured Motorist Coverage Insurance?
Uninsured Motorist Coverage has two components: Bodily Injury (UMBI) pays your medical bills, lost wages, and pain and suffering when an at-fault driver has no insurance or insufficient coverage, and Property Damage (UMPD) covers your vehicle repairs in the same scenario. If you're hit by someone who fled the scene (hit-and-run), UM coverage typically steps in as if the phantom driver had no insurance. The coverage pays up to your policy limits, not the other driver's nonexistent limits — so if you carry $50,000/$100,000 UMBI and sustain $75,000 in medical costs from an uninsured driver, you receive $50,000 from your own policy.
- You're stopped at a red light when an uninsured driver rear-ends you at 35 mph. You sustain $22,000 in medical bills for whiplash treatment and miss three weeks of work, losing $3,500 in wages. Your vehicle has $8,500 in damage. If you carry $50,000 UMBI and $25,000 UMPD, your UMBI pays the full $25,500 for medical and lost wages, and your UMPD pays the $8,500 vehicle repair (minus any deductible). Without UM coverage, you'd need to sue the uninsured driver personally — and most drivers without insurance have no assets to collect against.
- A vehicle sideswipes you on the highway and speeds off. You never get the plate number. You suffer $15,000 in injuries and your car needs $6,200 in repairs. Your $25,000/$50,000 UMBI policy pays the full $15,000 in medical costs. If your state allows UMPD for hit-and-runs and you carry $10,000 in UMPD, it covers the $6,200 repair minus your deductible (often $250–$500 for UMPD). Many high-risk drivers avoid collision coverage to save money — in those cases, UMPD is the only way to get your vehicle fixed after a phantom driver disappears.
- An at-fault driver with only $25,000 in liability hits you, causing $60,000 in medical bills. Their $25,000 policy pays out in full, leaving you $35,000 short. If you carry Underinsured Motorist (UIM) coverage at $50,000, your UIM policy pays the remaining $35,000 (your $50,000 limit minus the $25,000 already paid by the other driver). Many states bundle UM and UIM together; some require you to reject UIM in writing. For drivers with SR-22 requirements or recent violations, UIM can be critical — you're statistically more likely to encounter other high-risk drivers on the road who carry only state minimums.
Who Needs Uninsured Motorist Coverage Insurance?
If you live in a state with high uninsured motorist rates (above 10%), carry UM coverage at limits matching or exceeding your liability limits — you're protecting yourself from the same level of damage you could inflict on others. High-risk drivers with SR-22 requirements, recent DUIs, or multiple violations should strongly consider UM even in optional states: you're statistically more likely to share the road with other high-risk or uninsured drivers, and a serious injury from an uninsured driver could leave you with six-figure medical debt and no recourse. If you've dropped collision and comprehensive to afford mandatory SR-22 insurance, UMPD becomes your only protection for vehicle damage caused by uninsured or hit-and-run drivers.
Match your UM limits to your liability limits as a baseline — if you carry $100,000/$300,000 liability, carry the same in UMBI so you're equally protected whether you cause harm or suffer it. Then adjust based on your health insurance quality: strong health coverage justifies lower UMBI limits, while high-deductible health plans or no coverage at all argue for maximum UMBI. For UMPD, buy it only if you don't carry collision coverage and your vehicle is worth enough that a $5,000–$10,000 repair would create financial hardship.
How Much Does Uninsured Motorist Coverage Insurance Cost?
Uninsured Motorist Coverage typically adds $4 to $17 per month ($50 to $200 per year) to your auto insurance premium.
- Your UM coverage limits — higher limits (e.g., $100,000/$300,000 vs. $25,000/$50,000) increase cost proportionally, often by 30–60%.
- State uninsured motorist rate — if you live in a state where 15–20% of drivers are uninsured (like Florida, Mississippi, or New Mexico), insurers price UM coverage higher to reflect increased claim likelihood.
- Your ZIP code's hit-and-run frequency — urban areas with higher rates of phantom vehicle claims see UM premiums 20–40% above rural areas.
- Whether you stack coverage — in states that allow stacking, combining UM limits across multiple vehicles on your policy increases both protection and cost significantly.
- Your overall risk profile — drivers with DUIs, at-fault accidents, or SR-22 requirements already pay elevated base premiums, but UM coverage cost as a percentage of total premium often stays consistent or even drops slightly since UM claims aren't tied to your own driving behavior.
- Deductible selection for UMPD — choosing a $500 deductible instead of $250 can reduce UMPD cost by 15–25%, though many states don't allow deductibles on UMBI.