Car accidents. Of course, your actual rates will depend on where you live in illinois, your vehicle, driving habits, driving history, and more. No, car insurance companies do not impact your credit when they provide a quote or check your credit. Data scientists at insurify analyzed over 40 million auto insurance rates across the united states to compile the car insurance quotes, statistics, and data visualizations displayed on this page. Policy discounts, driver discounts, and vehicle discounts. Apart from safeco, state farm, allstate, usaa and liberty mutual are the other top performers on the list of best car insurance companies. Make sure to ask your insurance carrier about bundling discounts, as this can significantly lower the cost of insurance for both policies. Car insurance companies register themselves with the illinois department of insurance.