Car Insurance in Illinois: Costs, Laws, and How to Save

Car insurance in Illinois averages an estimated $131 per month ($1,575 per year) for full coverage, according to QuoteFii's analysis of NAIC and BLS data [1][2]. That's 13% below the national average of $150 per month, placing the Prairie State solidly in the affordable half of the country.

Say you're currently paying $182 per month in Georgia [1][2]. Moving to Illinois (outside of Chicago) could save you over $600 per year on the same coverage. Illinois benefits from a competitive insurance market, an at-fault system that keeps claims costs manageable, and moderate weather risk compared to coastal states.

This guide covers what Illinois requires, how the state's fault system affects claims, where rates run highest and lowest across the state, and practical steps to lower your premium. For a side-by-side look at how all 50 states compare, see our full state-by-state breakdown.

Quick check: Enter your zip code to compare rates from top carriers in about 2 minutes. It's free, with no obligation.

Illinois Car Insurance Requirements

Illinois requires all drivers to carry liability insurance at 25/50/20 minimums plus mandatory uninsured motorist coverage at matching limits, making it one of about 20 states that require UM protection [3]. Uninsured motorist coverage protects you when the at-fault driver has no insurance.

Coverage	Required Minimum
Bodily Injury (per person)	$25,000
Bodily Injury (per accident)	$50,000
Property Damage (per accident)	$20,000
Uninsured Motorist BI (per person)	$25,000
Uninsured Motorist BI (per accident)	$50,000

Last updated: March 2026 [3]

The shorthand for these minimums is 25/50/20, which refers to the liability limits. Illinois is one of only about 20 states that also require uninsured motorist bodily injury coverage at matching limits [3].

The Illinois Department of Insurance warns that state minimums may not be enough to fully protect you from lawsuits [3]. A single emergency room visit can easily exceed $25,000, and a serious accident with multiple injuries could blow past the $50,000 per-accident cap. If your assets exceed what minimum coverage protects, consider higher limits. Our guide on liability vs. full coverage walks through the decision.

Penalties for driving without insurance include license plate suspension, fines up to $1,000, and a mandatory $100 reinstatement fee [3]. Repeat offenses carry vehicle impoundment and higher fines. If your registration is suspended, you may need an SR-22 filing (proof of financial responsibility) to get it reinstated.

If your car is financed or leased, your lender will almost certainly require collision and comprehensive coverage on top of the state minimums.

How Illinois' At-Fault System Works

Illinois uses a modified comparative negligence system where you can recover damages only if you were less than 50% at fault for the accident (735 ILCS 5/2-1116) [4]. As a tort (at-fault) state, the driver who causes an accident is financially responsible for the other party's damages. You file a claim against the at-fault driver's insurance, not your own.

The critical threshold: you can recover damages only if you were less than 50% at fault [4]. At 50% or above, you recover nothing. If you're 30% at fault and the other driver is 70% at fault, your compensation is reduced by 30%.

The Illinois Department of Insurance notes that it cannot determine comparative negligence itself; that determination is made through insurance company assessment or, ultimately, the courts [4].

This system generally keeps premiums lower than no-fault states because insurers don't have to pay out Personal Injury Protection (PIP) benefits for every accident regardless of fault. In no-fault states like New York, every fender bender generates a PIP claim. In Illinois, minor accidents where no one files a claim against the other driver simply don't become insurance events.

Car Insurance in Illinois by City

Chicago drivers pay an estimated $170 per month for full coverage (30% above the $131 statewide average [1][2]), while downstate cities like Springfield and Peoria average closer to $115. The urban/rural cost gap is one of the biggest rate drivers in Illinois:

City	Est. Monthly (Full Coverage)	vs. State Avg ($131)
Chicago	~$170	~30% above
Aurora	~$150	~15% above
Rockford	~$135	About average
Springfield	~$115	~12% below
Peoria	~$115	~12% below
Champaign	~$110	~16% below
Rural Illinois	~$95	~27% below

Last updated: March 2026. State average from [1][2]; city estimates based on ZIP-level rate variation.

Chicago dominates the picture. The city's dense traffic, high vehicle theft rates, and frequent accident claims push premiums well above the state average. Some South Side and West Side ZIP codes can run 40% to 50% above the statewide figure. By contrast, drivers in Springfield, Peoria, and smaller downstate communities often pay less than $120 per month.

This urban/rural split is one of the biggest rate drivers in Illinois. If you live in the Chicago metro area, comparing quotes is especially important because the spread between the cheapest and most expensive carrier for your ZIP code can be wider than in less dense markets.

Why Car Insurance in Illinois Is Below Average

At $131 per month, Illinois sits 13% below the national average of $150, based on NAIC data analyzed by QuoteFii [1][2]. Several factors explain why Illinois consistently ranks in the more affordable half of states [1][2][3]:

The at-fault system limits claim volume. Illinois' tort system means minor accidents often don't generate insurance claims at all. In no-fault states, every injury goes through PIP regardless of who caused the crash. In Illinois, if the at-fault driver's liability covers the damage, only one claim gets filed, keeping overall costs lower.

Required uninsured motorist coverage adds a safety net. Illinois' mandate for UM coverage means fewer insured drivers get stuck absorbing costs from uninsured at-fault drivers. This spreads risk more evenly across the market [3].

Moderate weather risk compared to coastal states. Illinois deals with winter storms, hail, and occasional tornadoes, but it doesn't face the hurricane exposure that drives up comprehensive premiums in Florida or the wildfire risk that pressures California. Severe weather claims exist, but they're less frequent and less costly on average.

A competitive insurance market. Illinois has a large number of licensed insurers writing auto policies, including regional carriers that compete aggressively on price. The Department of Insurance has been actively pushing for rate reform, including proposals to limit how insurers use ZIP codes and credit scores in pricing [3]. More regulatory scrutiny tends to benefit consumers.

However, Illinois' uninsured driver rate is notable. At approximately 15.2%, Illinois' uninsured motorist rate is close to the national average of about 15.4% [5]. That's higher than neighboring states like Ohio (5.6%) and means some risk from uninsured drivers gets baked into everyone's premiums. The state's mandatory UM coverage requirement helps offset this.

How to Lower Your Illinois Car Insurance Rate

Even in a moderately affordable state, shopping around matters. A Consumer Reports survey of more than 40,000 drivers found that those who compared and switched saved a median of $461 per year [6]. In Chicago, where rates run well above the state average, the potential savings from switching are even larger.

1. Compare quotes from multiple carriers. Illinois' competitive market means the spread between the cheapest and most expensive carrier for your profile can be hundreds of dollars per year. Compare rates from top carriers here to see what you could save.

2. Maintain a clean driving record. Illinois' at-fault system means accidents directly affect your premiums. Nationally, drivers with one at-fault accident pay roughly $216 per month vs. $150 for a clean record [1][2][7]. Keeping a clean record is one of the most powerful ways to control your rate.

3. Raise your deductible. Increasing your collision and comprehensive deductible from $500 to $1,000 can meaningfully lower your monthly premium. Make sure you can afford the higher out-of-pocket cost if you file a claim. See our deductible comparison guide for the math.

4. Bundle auto with homeowners or renters insurance. Multi-policy discounts are widely available in Illinois and can reduce your auto premium by 10% to 15%.

5. Ask about all available discounts. Good student discounts, defensive driving course credits, low-mileage discounts, anti-theft device credits, and autopay/paperless billing discounts all add up. Many drivers qualify for discounts they never ask about.

6. Improve your credit score. Illinois allows insurers to use credit-based insurance scores in pricing (though the Department of Insurance has pushed to change this). Nationally, drivers with excellent credit pay an average of $120 per month, while those with poor credit pay $212 for the same coverage [7]. That's a $92 per month gap. Improving your credit can be one of the most impactful rate reductions available.

7. Consider usage-based insurance. If you drive fewer than average miles (especially relevant for remote workers or retirees), telematics or pay-per-mile programs can reduce your premium. The FTC and UC Berkeley found that usage-based insurance monitoring discounts average about 7% [8].

Frequently Asked Questions

How much does car insurance cost in Illinois per month?

The statewide average for full coverage is about $131 per month ($1,575 per year), which is 13% below the national average of $150 [1][2]. Your actual rate depends on your ZIP code, driving record, credit score, age, and vehicle. Chicago drivers typically pay more, while downstate drivers often pay less.

What are the minimum car insurance requirements in Illinois?

Illinois requires 25/50/20 liability coverage: $25,000 per person and $50,000 per accident for bodily injury, plus $20,000 for property damage [3]. Illinois also requires uninsured motorist bodily injury coverage at $25,000/$50,000. PIP is not required.

Is Illinois a no-fault or at-fault state?

Illinois is an at-fault (tort) state with modified comparative negligence [4]. The driver who causes an accident is responsible for damages. You can recover compensation as long as you were less than 50% at fault, but your payout is reduced by your percentage of fault.

Does Illinois require uninsured motorist coverage?

Yes. Illinois is one of about 20 states that mandate uninsured motorist bodily injury coverage [3]. The required minimums match the liability minimums: $25,000 per person and $50,000 per accident. This protects you if an uninsured or hit-and-run driver injures you.

Why is car insurance cheaper in Illinois than in many other states?

Illinois' at-fault system, competitive insurance market, moderate weather risk (no hurricanes or wildfires), and required UM coverage all contribute to premiums below the national average [1][2][3]. Downstate areas are especially affordable, though Chicago pushes the statewide average up.

Does Illinois use credit scores for car insurance?

Yes. Illinois currently allows insurers to factor credit-based insurance scores into your premium [7]. The impact is significant: nationally, drivers with poor credit pay roughly $193 per month more than those with excellent credit for the same coverage [7]. The Illinois Department of Insurance has advocated for reforms to limit credit score use in rate-setting.

How much more expensive is car insurance in Chicago?

Chicago drivers typically pay about 30% more than the statewide average [1][2], with estimated premiums around $170 per month or higher. Some high-risk ZIP codes on the South and West Sides can run 40% to 50% above the state average. Dense traffic, vehicle theft, and higher claim frequency all drive up Chicago rates.

The Bottom Line

Illinois offers car insurance rates that are solidly below the national average, with the biggest savings available outside the Chicago metro area. The state's at-fault system, competitive carrier market, and required uninsured motorist coverage create a generally favorable environment for drivers.

If you live in Chicago, shopping around is essential. The gap between the most and least expensive carrier for your ZIP code can easily mean $500 or more per year. Downstate drivers have less rate variation but can still benefit from comparing, especially if they haven't shopped in the past two to three years. The typical driver who switches saves about $461 per year [6].

For a broader look at how Illinois compares to neighboring states like Ohio, Michigan, or Pennsylvania, check our full state-by-state cost comparison.

Ready to see if you can pay less? Enter your zip code to compare rates from top carriers in about 2 minutes. It's free, no obligations.

---