What Illinois Requires on Every Auto Policy
Illinois law requires every registered vehicle to carry bodily injury liability of at least $25,000 per person and $50,000 per accident, property damage liability of at least $20,000, and uninsured motorist coverage. That uninsured motorist mandate catches many drivers off guard — it is not optional, and skipping it leaves your policy non-compliant even if you carry the liability minimums.
These requirements apply to every car you own. If you insure two vehicles, both must meet the same minimum limits. If you add a third car mid-term, the new vehicle must carry the same coverage from the moment it joins the policy. The state does not tier requirements by vehicle count or household size — one car or four, the floor is identical.
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Get Your Free QuoteIllinois Liability Minimums
$25,000 / $50,000 / $20,000
Bodily injury liability of $25,000 per person and $50,000 per accident, plus $20,000 property damage liability. Every registered vehicle in Illinois must carry at least these limits.
Illinois Secretary of State
The Uninsured Motorist Mandate Most Drivers Miss
Illinois is one of the states that mandates uninsured motorist coverage, not just liability. Many drivers assume liability alone satisfies the legal minimum — it does not. Your policy must include uninsured motorist bodily injury coverage at limits matching your liability coverage, unless you explicitly reject it in writing.
This matters when you compare quotes. A carrier quoting liability-only is quoting an illegal policy in Illinois. A compliant minimum-coverage quote includes both liability and uninsured motorist coverage. If a quote looks unusually low, confirm it includes the UM mandate before you buy.
The uninsured motorist requirement exists because 15.2% of Illinois motorists drive without insurance. When an uninsured driver hits you, your UM coverage pays your medical bills and lost wages up to your policy limits. Without it, you pay out of pocket even when the crash was not your fault.
A liability-only quote in Illinois is non-compliant. The state mandates uninsured motorist coverage on every policy unless you reject it in writing.
What Minimum Coverage Actually Pays For
Bodily injury liability pays medical bills, lost wages, and legal costs when you injure someone in a crash you caused, up to your policy limits. Property damage liability pays to repair or replace the other driver's vehicle and any property you damaged. Neither pays for your own car or your own medical bills if you caused the crash. If you total your own vehicle in an at-fault collision, minimum coverage leaves you with the repair bill.
Uninsured motorist coverage fills the gap when an uninsured or underinsured driver hits you. It pays your medical expenses and lost income up to your UM limits, which must match your liability limits unless you choose higher coverage. It does not pay for your vehicle damage — that requires uninsured motorist property damage coverage, which Illinois does not mandate but many carriers offer as an add-on.
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How Adding Vehicles Changes Your Coverage Structure
When you add a second or third vehicle to your policy, each car must carry the same minimum limits. Illinois does not allow you to insure one vehicle at minimum coverage and another at higher limits on the same policy — every vehicle on the policy shares the same liability and UM limits. If you want different coverage levels, you need separate policies.
Adding a vehicle mid-term re-rates your entire policy, not just the new car. The carrier recalculates your premium based on the total number of vehicles, the drivers assigned to each, and the garaging address for all cars. A household with three vehicles garaged at the same address typically qualifies for a multi-car discount, but the discount applies to the policy premium, not to individual vehicles.
Most carriers require every household vehicle to sit on the same policy to qualify for the multi-car discount. A car titled to a household member but insured on a separate policy does not count toward the same-policy requirement. If you own three cars but one is on a different policy, you lose the multi-vehicle discount on the other two unless you combine them.
Illinois Uninsured Motorist Rate
15.2%
15.2% of Illinois motorists drive without insurance. The state's uninsured motorist mandate exists to protect you when one of them causes a crash.
Insurance Information Institute, 2023
Proof of Insurance and Registration Compliance
Illinois requires proof of insurance at vehicle registration and renewal. The Secretary of State verifies coverage electronically through the state's insurance database — your carrier reports your policy status directly to the state. If your coverage lapses or you cancel mid-term without replacing it, the state receives notice and can suspend your registration.
You must carry proof of insurance in every vehicle you drive. Acceptable proof includes your insurance ID card (paper or electronic), a certificate of insurance from your carrier, or a binder letter if you just bought a policy. A lapsed or expired card does not satisfy the requirement, even if you have active coverage — the card must reflect your current policy dates.
Compare Carriers That Write Illinois Minimum Coverage
Illinois has 32 carriers writing auto insurance statewide, including Geico, State Farm, Progressive, Allstate, and Farmers. Not every carrier offers the same minimum-coverage structure — some bundle uninsured motorist coverage into their base quote automatically, others require you to add it manually. Compare quotes from at least three carriers to confirm you are getting compliant minimum coverage at the lowest available rate.
When you request quotes, specify the number of vehicles you need to insure and confirm each quote includes both liability and uninsured motorist coverage at the state minimums. A quote that omits UM coverage is non-compliant. A quote that includes only liability is illegal in Illinois. The comparison tool on this site connects you to carriers licensed in Illinois and structures quotes around the state's actual requirements, including the UM mandate most comparison sites overlook.