What the Numbers Actually Mean
Illinois requires every driver to carry liability insurance with minimum limits of $25,000 bodily injury per person, $50,000 bodily injury per accident, and $20,000 property damage per accident. Those three numbers — written as 25/50/20 — appear on every insurance card and policy declaration page. Most drivers recognize them as the state minimum. Fewer understand what they actually protect.
The confusion deepens when you insure more than one vehicle. A household with two cars on one policy does not get double the liability coverage. The 25/50/20 limits apply to each accident you cause, not to each vehicle you own. If you cause a crash while driving either car, your policy pays up to those limits and no more. Adding a second or third vehicle to your policy does not raise the liability ceiling unless you actively choose higher limits.
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Get Your Free QuoteIllinois Per-Accident Bodily Injury Cap
$50,000
This is the maximum your minimum-limit policy will pay for all bodily injuries in a single accident, regardless of how many people are hurt or how many vehicles you own. Illinois Revised Statutes 625 ILCS 5/7-203 sets this floor.
625 ILCS 5/7-203
Per-Accident Limits vs Per-Vehicle Limits
The 25/50/20 structure is a per-accident limit, not a per-vehicle limit. The $25,000 per-person cap means your insurer will pay up to $25,000 for any one person's injuries in an accident you cause. The $50,000 per-accident cap means your insurer will pay up to $50,000 total for all bodily injuries in that accident, even if three people are hurt. The $20,000 property-damage cap covers damage to other people's vehicles and property in that accident.
When you add a second car to your policy, you are adding another insured vehicle. You are not adding another $50,000 of liability coverage. If you cause an accident while driving your sedan and injure two people badly enough that their medical bills exceed $50,000 combined, your policy stops paying at $50,000. The fact that you also insure an SUV on the same policy does not give you access to a second $50,000 bucket. One accident, one set of limits.
This structure creates a coverage gap for multi-car households. A family with three drivers and three vehicles faces the same liability exposure per accident as a single driver with one car, unless they raise their limits. The state does not require higher limits for households with more vehicles. The minimum is the minimum, regardless of how many cars sit in your driveway.
Adding a vehicle to your policy does not increase your liability limits. One policy, one set of per-accident caps, no matter how many cars you insure.
How Multi-Car Households Hit the Cap Faster
Consider a household with two cars, two drivers, and a 25/50/20 policy. The policy pays $50,000 — the per-accident cap — and Driver B is personally liable for $20,000. The household now faces $25,000 in out-of-pocket liability across two accidents, even though both drivers were insured under the same policy the entire time.
The alternative: raise the liability limits to 100/300/100 or higher at the time you add the second vehicle. Carriers writing multi-car policies in Illinois include State Farm, Geico, Progressive, Allstate, and dozens of others. Most offer liability limits well above the state minimum. The decision to raise limits happens at policy setup or renewal, not after an accident.
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When Minimum Limits Are Not Enough
Illinois does not require uninsured motorist coverage, but it must be offered. When you reject it, you are betting that every driver who hits you carries adequate insurance. In Illinois, 15.2% of motorists drive uninsured. If an uninsured driver totals your car or injures you, your own policy's uninsured-motorist coverage steps in — but only if you bought it. Minimum-limit policies often pair minimum liability with no uninsured-motorist coverage, leaving the household exposed on both sides of an accident.
Medical bills from a serious injury routinely exceed $50,000. Property damage to a new vehicle can approach $20,000 before you account for the other driver's injuries. A household insuring two or three vehicles — especially if those vehicles are driven by a mix of experienced and newer drivers — faces higher statistical risk of causing a serious accident. The minimum limits were set decades ago and have not kept pace with medical costs or vehicle values. Raising limits to 100/300/100 or 250/500/100 costs more per month, but it closes the gap between what the policy pays and what a serious accident actually costs.
Some households choose to carry minimum liability on one vehicle — often an older car driven infrequently — and higher limits on the primary vehicles. That approach works only if the household understands that the driver, not the vehicle, determines which policy applies. If the driver of the minimum-limit car causes a serious accident, the minimum-limit policy responds. The fact that the household also insures a car with higher limits does not help.
Illinois Uninsured Motorist Rate
15.2%
More than one in seven drivers on Illinois roads carries no insurance. Your uninsured-motorist coverage protects you when one of them causes an accident. Illinois does not require UM coverage, but every insurer must offer it.
Insurance Information Institute, 2023
Raising Limits When You Add a Vehicle
The cleanest time to raise liability limits is when you add a vehicle to your policy. Most carriers re-rate the entire policy at that point, recalculating premiums for every vehicle and driver based on the new household structure. Adding higher liability limits during that re-rating costs less than raising limits mid-term on an unchanged policy, because the carrier is already recalculating your risk profile.
Call your carrier or log into your account before you finalize the vehicle purchase. Ask for a quote that includes the new vehicle and higher liability limits — 100/300/100 at minimum, 250/500/100 if the household's assets or income justify it. Compare the premium increase for the new vehicle alone against the premium increase for the new vehicle plus higher limits across the entire policy. The difference is often smaller than drivers expect, especially for households with clean driving records.
Compare Carriers That Write Multi-Car Policies
Not every carrier prices multi-car policies the same way. Some apply a multi-car discount that lowers the per-vehicle premium when you insure two or more cars on one policy. Others price each vehicle separately and offer no multi-car discount. The difference in total premium can be significant, especially when you raise liability limits at the same time you add a vehicle. Carriers writing multi-car policies in Illinois include State Farm, Geico, Progressive, Allstate, American Family, Country Financial, and others. Request quotes from at least three carriers, specifying the same liability limits and the same household structure for each. The lowest-cost carrier for a single-car policy is not always the lowest-cost carrier for a multi-car household.