What Is Uninsured Motorist Coverage and Do You Really Need It?

Uninsured motorist coverage (UM or UIM) pays for your injuries and vehicle damage when you're hit by a driver who has no insurance or not enough insurance to cover your losses. In 2022, approximately 12.6% of U.S. drivers were uninsured according to the Insurance Research Council — that's roughly one in eight vehicles on the road. The rate climbs significantly higher in some states: Florida sees nearly 20% uninsured drivers, while Mississippi exceeds 23%. Here's the scenario this coverage addresses: you're stopped at a red light when another driver rear-ends you at 40 mph. You have $5,000 in medical bills and $8,000 in car repairs. The other driver is clearly at fault — but when the police run their information, they have no insurance. Without uninsured motorist coverage, you're filing a lawsuit against someone who probably can't pay, or you're covering those costs yourself through your collision coverage (if you have it) and health insurance, both of which may have deductibles. For drivers under 25, this risk compounds. Younger drivers statistically drive in higher-traffic areas, own older vehicles worth less than the cost of repairs, and have smaller financial cushions to absorb a $5,000–$15,000 surprise expense. Uninsured motorist coverage shifts that risk back to your insurance company for typically $5–$15 per month in additional premium.

Uninsured motorist coverage comes in two forms: bodily injury (UMBI) and property damage (UMPD). UMBI covers medical expenses, lost wages, and pain and suffering when an uninsured driver injures you. UMPD covers vehicle repairs and damage to your property. Some states bundle these together; others sell them separately. A handful of states — including Illinois, Kansas, and New York — require you to carry UMBI unless you reject it in writing. Underinsured motorist coverage (UIM) works similarly but applies when the at-fault driver has insurance that's too low to cover your damages. If someone with minimum liability limits of $25,000 causes an accident that results in $60,000 in medical bills, your UIM coverage pays the $35,000 gap up to your policy limit. This matters more than most first-time buyers realize: many drivers carry only their state's minimum liability limits, which in states like California ($15,000 per person) and Florida ($10,000) are far below the cost of a serious injury. When you file a UM or UIM claim, your own insurance company investigates the accident just as they would if you were at fault — but they're paying you, not the other driver. You'll provide a police report, medical records, and repair estimates. The claim doesn't count as an at-fault accident on your record because you weren't at fault. Your rates typically don't increase, though this varies by carrier and state.

Uninsured motorist coverage typically adds $4–$18 per month to your premium depending on your state, coverage limits, and age. For a 22-year-old driver in Georgia paying $180/month for full coverage, adding $50,000/$100,000 UMBI and $25,000 UMPD might cost an additional $12/month — roughly $144/year. That's cheaper than collision coverage (which adds $30–$70/month for young drivers) but more expensive than roadside assistance. The value calculation is straightforward: you're paying $144/year to protect against a scenario that has a 12.6% chance of occurring if you're in an accident. If you're hit by an uninsured driver and have $10,000 in medical bills, that coverage pays for itself 69 times over in the first claim. If you never file a claim, you've spent $1,440 over ten years on protection you didn't use — the same logic that applies to any insurance. For drivers under 25, the math shifts slightly. Younger drivers have statistically higher accident rates — roughly 1.5 to 2 times higher than drivers over 25 according to NAIC data. If you're more likely to be in an accident, you're more likely to encounter an uninsured driver in one of those accidents. The coverage becomes actuarially more valuable even though it costs the same as it would for an older driver with the same limits.

You can reasonably skip uninsured motorist coverage in exactly three situations. First, if your state requires it and you're willing to sign a rejection waiver, and you have both comprehensive health insurance with low deductibles and an emergency fund covering at least $10,000 in unexpected costs. Second, if you live in a no-fault insurance state like Michigan or New York where personal injury protection (PIP) already covers your medical bills regardless of who caused the accident. Third, if you drive a vehicle worth under $2,000 and carry liability-only coverage with no collision or comprehensive — you're already self-insuring for vehicle damage, and adding UMPD alone rarely makes sense without UMBI. You should not skip this coverage if you're financing or leasing a vehicle, if you don't have health insurance or have high deductibles ($3,000+), if you live in a state with uninsured driver rates above 15%, or if you're the primary income earner in your household. A single accident with an uninsured driver can generate medical bills that exceed your out-of-pocket maximum, lost wages during recovery, and vehicle damage that forces you into a new car loan — all while you're still making payments on the damaged vehicle. For first-time insurance buyers, the default answer should be yes, carry it. The coverage is inexpensive relative to the risk, and you likely don't yet have the financial reserves to absorb a $15,000 surprise cost. As your income grows and your savings increase, you can reevaluate — but in your first few years of driving, this is one of the higher-value line items on your policy.

Uninsured motorist limits typically mirror your liability insurance limits, and most states require them to match unless you specifically request lower UM limits. If you carry $100,000/$300,000 liability coverage, you'd select $100,000/$300,000 uninsured motorist coverage. The first number is the maximum your insurer pays per person injured in an accident; the second is the maximum per accident regardless of how many people are injured. For drivers under 25, a reasonable starting point is $50,000/$100,000 for bodily injury and $25,000 for property damage. This costs less than higher limits but provides meaningful protection. If you can afford an extra $5–$8/month, increase bodily injury limits to $100,000/$300,000 — medical costs from a serious accident (surgery, hospital stay, rehabilitation) regularly exceed $50,000, and underinsured drivers you encounter on the road likely carry minimum state limits well below that threshold. Avoid matching your UM limits to your state's minimum liability requirements unless cost is genuinely prohibitive. Minimum limits exist to satisfy legal requirements, not to provide adequate financial protection. A $25,000 UM limit might cover a minor injury and fender bender, but it won't cover a broken bone requiring surgery, multi-day hospital stay, and eight weeks of lost wages.

Without uninsured motorist coverage, you have three options after an uninsured driver hits you, and none are good. First, you can file a lawsuit against the at-fault driver personally — but if they couldn't afford insurance, they likely can't pay a $20,000 judgment, and collecting becomes your problem. Second, you can file under your own collision coverage if you have it, but you'll pay your deductible (typically $500–$1,000) and the claim may affect your rates even though you weren't at fault. Third, you can pay out of pocket. Medical bills go to your health insurance if you have it, minus your deductible and coinsurance. If you don't have health insurance, you're negotiating payment plans with hospitals and specialists while managing vehicle repairs. Vehicle damage either goes through collision coverage (with your deductible) or you pay directly. If your car is totaled and you owe more than it's worth, you're covering that gap unless you have gap insurance. The worst-case scenario for a driver under 25: you're hit by an uninsured driver, you have liability-only coverage because you drive an older car, and you don't have uninsured motorist coverage. Your car is totaled. You have $8,000 in medical bills and no health insurance. The at-fault driver has no assets. You're now without a car, facing medical debt, and have no insurance payout coming. This scenario plays out thousands of times per year, and it's entirely preventable with a coverage that costs about as much as two streaming subscriptions per month.