Illinois car insurance requirements

Illinois requires liability insurance for every registered vehicle, pairs it with mandatory uninsured motorist coverage, and verifies compliance electronically rather than relying on paper records. Here's what the state actually requires and how it's enforced.

Minimum liability limits

Illinois requires drivers to carry liability coverage of at least:

• $25,000 in bodily injury liability per person.
• $50,000 in bodily injury liability per accident.
• $20,000 in property damage liability per accident.

These are commonly written as 25/50/20. Illinois is an at-fault, or tort, state, meaning the driver responsible for causing an accident is expected to cover the resulting damages through this liability coverage. Confirm current minimums with the Illinois Department of Insurance, since figures can be updated by the legislature.

Uninsured and underinsured motorist coverage is mandatory

Illinois requires every auto policy to include uninsured motorist coverage at the same limits as your bodily injury liability, and insurers must also offer underinsured motorist coverage. This is not an optional add-on you can decline to save money on the uninsured motorist piece — it's built into the base requirement. That matters because Illinois has a meaningful number of drivers on the road without adequate insurance, and this coverage is what protects you and your passengers if you're hit by one of them.

Electronic insurance verification

Illinois uses an electronic system that cross-checks vehicle registrations against active insurance policies, so a lapse can be identified without a traffic stop. If your coverage lapses, the Illinois Secretary of State can suspend your registration and driving privileges, and reinstatement typically requires a fee and proof of new coverage. Driving without insurance in Illinois also carries fines that increase for repeat offenses, along with potential impoundment of your vehicle in some circumstances. The safest approach is to never let a policy lapse even briefly — line up new coverage before canceling the old policy, especially if you're switching insurers.

Proof of insurance

Keep proof of insurance in your vehicle, and be prepared to show it to law enforcement or when renewing your registration. Illinois generally accepts digital proof of insurance shown on a smartphone, but it's worth confirming your specific insurer's app is accepted before relying on it exclusively.

What a lender requires beyond the minimum

If your car is financed or leased, expect the lender to require:

• Comprehensive coverage for theft, glass, fire, and weather damage.
• Collision coverage for damage to your own car regardless of fault.
• Continuous coverage without a lapse for the duration of the loan.

Illinois winters bring real comprehensive-claim risk from ice, hail, and deer strikes in rural parts of the state, so this coverage is often worth keeping even after a car is paid off. If you're deciding whether to drop it on an older vehicle, our guide to insuring an older car walks through the math.

Shopping around

Because Illinois bundles mandatory uninsured motorist coverage into every policy, prices can vary noticeably between insurers even for the same required coverage. It's worth checking multiple carriers before renewing automatically. You can compare quotes to see how insurers price the same required coverage differently for your profile.

The bottom line: Illinois requires 25/50/20 liability coverage plus mandatory uninsured motorist coverage at matching limits, verified electronically against your registration. Confirm current requirements with the Illinois Department of Insurance before buying or renewing.