Cheap Liability Car Insurance in Illinois

GEICO offers the cheapest liability car insurance in Illinois at $31 per month ($368 per year) for an adult male with a clean record and good credit — 40% below the Illinois average of $51 per month. This page covers state minimum liability-only coverage, which means no comprehensive or collision protection for your own vehicle. To see full coverage rates or compare the cheapest insurers across all coverage types, see our guides on full coverage car insurance and cheapest car insurance in Illinois.

The table below shows all major providers in Illinois ranked by cost for the same baseline profile. GEICO and Nationwide differ by $470 per year for identical coverage — the gap between cheapest and most expensive shows why comparing providers matters. For a broader view of Illinois insurers including customer service and coverage ratings, visit best car insurance in Illinois.

Young drivers in Illinois average $132 per month ($1,581 per year) for liability-only coverage — more than double the $51 per month adult rate. Seniors average $71 per month ($852 per year), a $20 per month increase over the adult baseline. Erie Insurance offers the cheapest liability rate for young drivers at $66 per month ($793 per year), while GEICO remains cheapest for seniors at $37 per month ($438 per year). Age-driven rate gaps are large across all providers, so comparison is especially valuable for young and senior drivers. For more on how age affects rates, see car insurance rates by age.

Erie Insurance saves young drivers $66 per month compared to the young-driver state average of $132 per month. The $1,959 per year gap between the cheapest (Erie) and most expensive (Farmers) provider shows the value of shopping multiple insurers. For additional strategies tailored to young drivers, visit cheap car insurance for teen drivers.

Liability-only car insurance rates for seniors are similar to those of middle-aged drivers, and GEICO is also the cheapest option in Illinois for senior drivers. In all states, seniors looking for the cheapest car insurance should shop around. GEICO, for example, costs almost $60 per month less than Allstate, another major name.

Violations raise Illinois liability rates sharply: speeding tickets add $157 per year, at-fault accidents add $313 per year, and DUIs add $540 per year compared to the $610 per year clean-record baseline. Illinois requires SR-22 certificates after certain violations, including DUI. SR-22 is a proof-of-insurance filing, not a separate policy, but drivers who need it often pay higher premiums due to the underlying violation. For details on SR-22 requirements and costs, see SR-22 car insurance in Illinois.

DUI surcharges vary the most across insurers — GEICO charges $758 per year while Farmers charges $1,896 per year for the same driver. Comparing providers after a violation is especially valuable. For broader high-risk coverage options, visit high-risk car insurance in Illinois and cheap car insurance after a bad driving record.

Auto-Owners has the cheapest liability-only car insurance for Illinois drivers with a speeding ticket at $36 per month. Erie and GEICO are similarly affordable, but our sample driver saw large rate increases with other major insurers like Travelers and Farmers.

Auto-Owners remains cheapest after an at-fault accident at $42 per month ($506 per year). At-fault accidents raise the Illinois average to $923 per year — a $313 increase over the clean-record baseline. For more on how accidents affect rates and when filing a claim makes financial sense, see how much rates go up after an accident.

Illinois drivers with a DUI are likely to see their rates rise significantly, but GEICO has the cheapest liability-only insurance at $63 per month. The riskier you are as a driver, the more it pays to shop around: the same driver getting the same policy with Farmers would pay $158 per month.

Poor credit raises the Illinois average for liability-only coverage to $81 per month ($969 per year) — a $359 per year increase over the $51 per month ($610 per year) good-credit baseline. Erie Insurance offers the cheapest poor-credit liability rate at $55 per month ($663 per year), $26 per month below the poor-credit state average. Illinois does not restrict credit-based pricing, so improving your credit score is one of the highest-impact steps you can take to lower your premium. For strategies tailored to drivers with credit challenges, visit car insurance with bad credit and low income car insurance in Illinois.