What Uninsured Motorist Coverage Protects
You're adding a second or third vehicle to your Illinois policy and the carrier is asking you to confirm uninsured motorist coverage limits for each car. Illinois is one of 15.2% uninsured-motorist states — meaning roughly one in seven drivers you share the road with carries no liability insurance. When one of those drivers hits your car, their lack of coverage becomes your problem unless your own policy fills the gap.
Uninsured motorist coverage exists to pay your household's injury and property-damage costs when the at-fault driver has no insurance. Illinois law requires carriers to offer it, and you must actively reject it in writing if you don't want it. Most households with multiple vehicles keep it because the cost of one uninsured claim exceeds years of premium.
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Get Your Free QuoteIllinois Uninsured Motorist Rate
15.2%
One in seven Illinois drivers operates without liability insurance. When an uninsured driver causes an accident involving your household's vehicles, your own uninsured motorist coverage becomes the only recovery path for injury and repair costs.
Insurance Information Institute, 2023
Two Coverage Components on Every Vehicle
Illinois splits uninsured motorist protection into two separate coverages: uninsured motorist bodily injury (UMBI) and uninsured motorist property damage (UMPD). UMBI pays medical bills, lost wages, and pain-and-suffering damages when an uninsured driver injures you or your passengers. UMPD pays to repair your vehicle when an uninsured driver damages it.
The split matters because the two coverages operate under different rules. UMBI is mandatory — carriers must offer it, and you can only decline it in writing. UMPD is optional in Illinois. Many households decline UMPD and rely on collision coverage instead, because collision pays regardless of who caused the accident and doesn't require proving the other driver was uninsured.
When you insure multiple vehicles on one policy, each vehicle carries its own UMBI and UMPD limits. The limits you select apply per accident, not per vehicle. If two of your household's cars are hit in the same accident by one uninsured driver, the policy pays up to the per-accident limit once, not twice.
Illinois mandates UMBI but makes UMPD optional. Most multi-vehicle households skip UMPD and carry collision instead, because collision covers all accidents without requiring proof the other driver was uninsured.
What UMBI Covers Across Your Household
UMBI covers medical expenses, rehabilitation costs, lost income, and pain-and-suffering damages for you, your household members, and any passengers in your vehicles when an uninsured or hit-and-run driver causes the accident. You can select lower limits, but most households with multiple vehicles match their liability limits to avoid gaps.
The per-person and per-accident structure works the same as liability coverage. The limits apply once per accident, regardless of how many of your household's vehicles were involved.
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UMPD and the Collision Alternative
Uninsured motorist property damage pays to repair your vehicle when an uninsured driver damages it, but only up to the actual cash value of your car and only after you prove the other driver was at fault and uninsured.
Most households with multiple vehicles skip UMPD and carry collision coverage instead. Collision pays to repair your car regardless of who caused the accident, applies to single-vehicle accidents UMPD doesn't cover, and doesn't require proving the other driver was uninsured. The trade-off: collision costs more than UMPD. Households that finance or lease their vehicles already carry collision as a lender requirement, making UMPD redundant.
If you decline UMPD and don't carry collision, your only recovery path after an uninsured driver damages your car is suing the at-fault driver directly. That process takes months and often recovers nothing because uninsured drivers typically lack assets. Households with three or four vehicles sometimes carry collision on daily drivers and UMPD on older cars they own outright.
Illinois UMPD Cap Per Accident
$25,000
Illinois limits uninsured motorist property damage coverage to $25,000 per accident. Households with newer vehicles typically carry collision instead, because collision pays the full repair cost without a statutory cap.
Illinois Department of Insurance
Underinsured Motorist Coverage
Illinois bundles underinsured motorist coverage with uninsured motorist coverage. Underinsured motorist (UIM) pays when the at-fault driver carries liability insurance, but their limits are too low to cover your household's injury costs. If the other driver carries Illinois minimum liability ($25,000/$50,000) and your medical bills exceed $25,000, your UIM coverage pays the difference up to your policy limits.
UIM operates as excess coverage — it pays only after the at-fault driver's liability policy exhausts. Households with multiple vehicles often carry UIM limits higher than their liability limits to protect against Illinois's high uninsured and underinsured driver rates.
Compare Carriers Writing Illinois Multi-Vehicle Policies
Uninsured and underinsured motorist coverage costs vary significantly across carriers writing Illinois multi-vehicle policies. Some carriers price UMBI and UIM as a percentage of your liability premium; others charge a flat amount per vehicle. The difference compounds when you insure three or four cars on one policy. Carriers that write high-risk and non-standard policies — including those that file SR-22 certificates — often price UM coverage higher than preferred-tier carriers, even when the household has no violations.
Compare quotes from carriers that write Illinois multi-vehicle policies and confirm each quote shows identical UMBI and UIM limits across all your household's vehicles. Mismatched limits across vehicles on the same policy create gaps that surface only at claim time. Use the comparison tool to see which carriers offer the coverage structure your household needs at rates that fit your budget.