Illinois Car Insurance: Liability, Uninsured Coverage and Written Quotes

Illinois DOI describes 25/50/20 liability and 25/50 uninsured motorist bodily injury. Higher UM selections also bring a UIM requirement.

Identify the Illinois required lines

IDOI lists $25,000 bodily injury per person, $50,000 per accident and $20,000 property damage, plus $25,000/$50,000 uninsured motorist bodily injury. The protections address different losses; one should not be silently substituted for another.

Higher UM and the UIM connection

The regulator says UIM bodily injury is required when you purchase higher UM bodily injury limits. Ask the insurer to identify that relationship and the actual UIM calculation. Do not assume UM protects every type of damaged property.

Make a written comparison

IDOI advises obtaining written quotes with the same coverages and limits and checking licensing. Keep the actual underwriting company name, not just a familiar brand.

An application-before-cancellation exercise

Suppose a proposal looks cheaper but has not been accepted by the insurer. Ask what document confirms the final price, coverage and start time before changing the old policy. Preserve written acceptance and avoid guessing from an estimate alone.

Use complaint information carefully

The shopping guide points to complaint information. Read its reporting scope and compare the relevant company rather than interpreting an unexplained complaint count as a ranking. Record the policy provision, dates and responses before seeking consumer assistance.

Changing UM limits also raises a UIM question

Illinois’ higher-UM relationship means a quote comparison should include the corresponding UIM line. Obtain the forms and selected limits rather than treating a larger UM figure as the only change.

Illustrative shopping scenario: Pat asks one insurer for the minimum UM injury limits and another for higher UM injury limits. Before comparing premiums, Pat should ask the second insurer to identify the UIM protection included under the state’s rule and should request a matched alternative from the first. Different protections make the price difference harder to interpret.

This example does not determine an actual UIM payment. Definitions, other recovery and applicable policy terms must be examined before calculating a benefit.

Test person and accident limits separately

Hypothetical accepted covered injury damages: Two people have $35,000 and $15,000 of damages. At 25/50 liability limits, the first person’s $25,000 ceiling leaves $10,000 outside that limit; the second amount fits. The illustrated $40,000 payment fits the accident limit, but its unused $10,000 does not expand the first person’s ceiling. Assume established responsibility and coverage with no other adjustments.

An Illinois quote worksheet with a completed decision point

Suppose an alternative costs $60 less for six months but raises a collision deductible from $500 to $1,000. The fictional premium difference is $10 a month as a simple equivalent; the added assumed share of a covered repair is $500. That is a coverage tradeoff, not evidence of a universally better deal. Use the deductible calculator with the actual offers.

Check complaint information at the right level

Match the company, line of insurance, reporting period and measurement definition before drawing a conclusion. A raw complaint count without those details is not a reliability ranking. Save the report scope with your comparison, and keep an individual claim dispute tied to the exact policy and response rather than a brand’s general reputation.

Source and review scope

Read the Illinois Department of Insurance source. Material inspected October 12, 2026; this is machine-supported research, not human approval. The actual policy, applicable law and exceptions require review. Use the coverage needs checklist to prepare questions; it does not choose coverage or establish legal compliance.