Multi-Car Insurance — Illinois
Illinois requires 25/50/20 liability coverage and is an at-fault state.
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Illinois at a Glance
25/50/20
Minimum liability limits, in thousands of dollars (per person / per accident / property)
At-fault
The at-fault driver's insurance pays for the damage they cause
Required
Uninsured motorist coverage must be on every policy
Source: state DMV, insurance department and statute records, verified July 2026
Multi-Car Liability Requirements in Illinois
The state also mandates uninsured motorist coverage. Illinois is a fault state, so the at-fault driver's liability pays the other party's damages. The multi-car discount applies when every vehicle sits on the same policy and typically shares a garaging address.
Bodily Injury Liability
Property Damage Liability
Uninsured Motorist Coverage
Multi-Car Discount
Full Coverage Per Vehicle
What Shapes Multi-Car Costs in Illinois
about $96/mo
Average car insurance spending in Illinois
Rate data: NAIC Auto Insurance Database, 2023
What Affects Your Rate
- Illinois's 25/50/20 liability minimum is the floor every vehicle on a multi-car policy must carry; raising limits on any vehicle increases that vehicle's portion of the premium.
- The multi-car discount in Illinois typically requires every vehicle on the same policy and the same garaging address; carriers like State Farm and Geico writing here give the discount when you add a second vehicle.
- Adding collision and comprehensive to any vehicle on a multi-car policy raises that vehicle's cost; each vehicle that carries physical-damage coverage has its own deductible.
- Illinois's 303.1 motor vehicle thefts per 100,000 population in 2024 affect comprehensive premiums for vehicles garaged in higher-theft areas; the multi-car discount applies on top of the theft-adjusted base rate.
- Carriers writing in Illinois calculate the multi-car discount differently—some give a larger discount on the second vehicle, others spread the discount evenly across all vehicles on the policy.
Put Every Car on One Better Policy
Get My Multi-Car Insurance QuoteFrequently Asked Questions
How does the multi-car discount work in Illinois?
The multi-car discount in Illinois requires every vehicle on the same policy and typically the same garaging address. Carriers like State Farm, Geico, and Progressive writing in Illinois give the discount when you add a second or third vehicle. Adding a vehicle mid-term re-rates the entire policy rather than adding a flat amount, so the discount adjusts with the new vehicle's profile.
Can I put two cars on one policy in Illinois if they have different coverage levels?
Yes. Every vehicle on an Illinois multi-car policy must carry the state's 25/50/20 liability minimum, but you can add collision and comprehensive to any vehicle independently. You can carry liability only on an older vehicle and full coverage on a newer one, both on the same policy earning the multi-car discount.
Which carriers in Illinois give the best multi-car discount?
Carriers writing in Illinois that offer multi-car discounts include State Farm, Geico, Progressive, Allstate, Farmers, Liberty Mutual, and USAA. Each carrier calculates the discount differently—some give a larger discount on the second vehicle, others spread the discount evenly across all vehicles. Compare carriers directly to see the current discount structure.
Does adding a vehicle mid-term change my Illinois multi-car discount?
Yes. Adding a vehicle mid-term to an Illinois multi-car policy re-rates the entire policy with the new vehicle's profile and coverage level. The multi-car discount recalculates across all vehicles on the policy, and the new premium reflects the combined discount on every vehicle.
Can I combine two Illinois policies into one multi-car policy?
Yes. Combining two separate Illinois policies into one multi-car policy requires every vehicle on the same policy and typically the same garaging address. Carriers like State Farm and Farmers writing in Illinois allow you to combine policies when household members marry or move in together, and the multi-car discount applies to the merged policy immediately.
Do all vehicles on an Illinois multi-car policy need the same deductible?
No. Each vehicle on an Illinois multi-car policy that carries collision or comprehensive has its own deductible. You can set a higher deductible on an older vehicle and a lower deductible on a newer one, both on the same policy earning the multi-car discount.
Coverage Types
Multi-Car Policy Structure
A multi-car policy puts two or more owned vehicles on one Illinois policy, each carrying at least the 25/50/20 liability minimum, and earns the multi-car discount when every vehicle shares the policy and typically the same garaging address.
Adding a Vehicle to Your Policy
Adding a vehicle mid-term to an Illinois multi-car policy re-rates the entire policy rather than adding a flat amount; the multi-car discount recalculates with the new vehicle's profile and coverage level.
Liability Coverage Per Vehicle
Every vehicle on an Illinois multi-car policy must carry the state's 25/50/20 liability minimum; you can raise limits on any vehicle independently while keeping the multi-car discount on the whole policy.
Full Coverage Per Vehicle
Full coverage—liability plus collision and comprehensive—is optional in Illinois and can differ per vehicle on a multi-car policy; you can carry liability only on an older vehicle and full coverage on a newer one, both earning the multi-car discount.
Combining Household Policies
Combining two separate Illinois policies into one multi-car policy requires every vehicle on the same policy and typically the same garaging address; the combined policy earns the multi-car discount on every vehicle.
Uninsured Motorist Coverage
Illinois mandates uninsured motorist coverage on every multi-car policy; this coverage pays your medical bills and vehicle damage when an uninsured driver hits you, and it applies to every vehicle and driver on your policy.