What Illinois Law Requires on Every Vehicle
Illinois law requires every registered vehicle to carry bodily injury liability coverage of at least $25,000 per person and $50,000 per accident, property damage liability of at least $20,000 per accident, and uninsured motorist coverage. These minimums apply to each vehicle on your policy. If you insure three cars, all three must meet the same statutory floor.
The uninsured motorist requirement surprises many households adding a second or third vehicle. Illinois is one of the states that mandates UM coverage by statute, not as an optional add-on. You can reject it in writing, but the default is mandatory inclusion. When you add a vehicle mid-term, the carrier applies UM to the new car automatically unless you have a rejection on file.
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Get Your Free QuoteIllinois Uninsured Motorist Rate
15.2%
More than one in seven drivers on Illinois roads carries no insurance. The state's uninsured motorist mandate exists because collision with an uninsured driver leaves you covering your own medical bills and vehicle damage without UM protection.
Insurance Information Institute, 2023
Collision and Comprehensive Are Not Required
Illinois does not require collision or comprehensive coverage. These coverages pay for damage to your own vehicle — collision covers crashes with another car or object, comprehensive covers theft, weather, vandalism, and animal strikes. State law requires only that you cover injury and property damage you cause to others, and that you carry protection against uninsured drivers.
Your lender or leasing company may require collision and comprehensive as a loan condition, but that is a contract requirement, not a state law. Once the loan is satisfied, you can drop both coverages if the vehicle's value no longer justifies the premium. Many multi-car households carry full coverage on newer financed vehicles and liability-only on older paid-off cars.
The decision to carry collision and comprehensive turns on the vehicle's value and your ability to replace it out of pocket. Liability-only makes sense when replacement cost is manageable without insurance.
Illinois requires uninsured motorist coverage by statute. You must reject it in writing to remove it from your policy — it is not optional by default.
How the Statutory Minimum Works Across Multiple Vehicles
When you carry one policy covering three vehicles, the liability limits apply to any accident involving any vehicle on that policy. If you cause an accident while driving one of your three cars, the $50,000 bodily injury per-accident limit is the maximum the policy pays for all injured parties combined, regardless of how many vehicles sit on the policy. Adding more vehicles does not increase your per-accident liability limit unless you purchase higher limits.
The per-person limit of $25,000 caps what the policy pays to any single injured person. If you injure three people in one accident, the policy pays up to $25,000 to each person, but no more than $50,000 total. The $20,000 property damage limit covers all property you damage in one accident — if you total another car and take out a fence, the combined property damage claim cannot exceed $20,000 under minimum coverage.
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Why Many Multi-Car Households Carry Higher Limits
The statutory minimum is a floor, not a recommendation. Medical bills from a serious injury exceed $25,000 quickly, and totaling a newer vehicle pushes property damage past $20,000. If you cause an accident and the damages exceed your liability limits, you are personally liable for the difference.
Households with multiple vehicles often carry higher liability limits because the incremental premium is small relative to the additional protection.
Uninsured motorist coverage follows the same limit structure as liability. If you carry $25,000/$50,000 liability, your UM coverage matches unless you purchase higher UM limits separately.
Illinois Minimum Liability Limits
$25,000 / $50,000 / $20,000
Bodily injury liability of $25,000 per person and $50,000 per accident, plus $20,000 property damage per accident. These are the statutory minimums required to register and legally drive any vehicle in Illinois.
Illinois Department of Insurance
Proof of Insurance and Registration
Illinois requires proof of insurance at vehicle registration and renewal, and you must carry proof in every vehicle you drive. The Secretary of State verifies coverage electronically when you register a car, and law enforcement can check coverage status during a traffic stop. Driving without insurance or providing false proof is a Class A misdemeanor.
When you add a vehicle to an existing multi-car policy, the carrier reports the new vehicle to the state electronically. You do not file separate proof for each car — the policy itself covers all listed vehicles, and the state's database reflects all active vehicles on your policy. If you let coverage lapse on one vehicle, the state receives a lapse notice for that vehicle specifically, triggering suspension of that vehicle's registration.
Compare Carriers Writing Multi-Car Policies in Illinois
Twenty-nine carriers write auto insurance in Illinois and offer multi-car policies. Not all carriers price multiple vehicles the same way — some apply a larger multi-car discount, others start with a lower base rate that makes the discount less critical. The difference in total premium across three vehicles can exceed the annual cost of insuring one car.
When you compare quotes, confirm that every vehicle meets Illinois' liability and uninsured motorist requirements, and verify whether you have rejected UM in writing if you do not want it. Carriers must offer UM at limits equal to your liability limits unless you sign a rejection form. If you are adding a vehicle mid-term, ask whether the new car will be rated individually or whether the entire policy re-rates — most carriers re-rate the whole policy, which can raise or lower your total premium depending on the new vehicle's profile.