Updated July 2026
What Is Liability Insurance Insurance?
Liability insurance is the foundation of every auto policy in Illinois. It covers bodily injury and property damage you cause to other people when you're at fault in an accident. Bodily injury liability pays for medical expenses, lost wages, and legal fees if you injure someone. Property damage liability covers repairs to another driver's vehicle, fence, building, or other property you damage.
- The other driver has $18,000 in medical bills and $6,500 in vehicle damage. Your bodily injury liability pays the $18,000 medical costs up to your per-person limit. Your property damage liability pays the $6,500 repair bill. Your own car's damage and any injuries you sustained are not covered by liability — you'd need collision coverage and medical payments or PIP for those.
- Three people are injured with combined medical costs of $95,000. Illinois minimum bodily injury coverage is $50,000 per accident, so you're personally liable for the remaining $45,000. The injured parties can sue you for the difference. This is why many drivers carry higher liability limits — 100/300/100 or 250/500/100 — to protect assets and avoid out-of-pocket exposure.
- The parked car needs $8,200 in repairs and the storefront glass costs $4,300 to replace. Your property damage liability covers both, totaling $12,500, as long as your limit is at least that high. Illinois requires only $20,000 in property damage coverage, which handles this scenario. If you carried only the minimum and caused $25,000 in damage, you'd pay the $5,000 difference yourself.
Who Needs Liability Insurance Insurance?
Every driver in Illinois is required by law to carry liability insurance, and it's the first coverage you should secure before registering a vehicle or renewing your license. If you own a home, have significant savings, or could be sued for assets, carry limits well above the state minimum — 100/300/100 or higher — to protect what you've built.
If you have assets worth protecting or earn a steady income, carry liability limits high enough that a lawsuit won't wipe you out. A $100,000 injury claim against a driver with only $25,000 in coverage leaves that driver personally liable for $75,000. If you're judgment-proof with no assets and minimum income, state minimums meet the legal requirement, but you're exposed to wage garnishment and financial ruin if you cause a serious crash.
How Much Does Liability Insurance Insurance Cost?
Illinois liability-only policies typically cost $45 to $85 per month for state minimum coverage, or $540 to $1,020 annually. Higher limits like 100/300/100 add $15 to $35 per month.
- Your driving record — one at-fault accident can raise liability premiums 20 to 40 percent for three years.
- Coverage limits — increasing from 25/50/20 to 100/300/100 typically adds $180 to $420 per year.
- Where you live in Illinois — Chicago drivers pay 30 to 50 percent more than rural county drivers due to accident frequency and claim costs.
- Your age and experience — drivers under 25 and over 70 face higher liability rates due to statistically higher at-fault accident rates.
- Your credit-based insurance score — Illinois allows insurers to use credit history, and a poor score can double your liability premium.