Liability Car Insurance: Coverage Types, Benefits, Costs, Split Limits, Premiums

What is liability car insurance?

Liability car insurance is a policy that pays for damage you cause to others. It covers bodily injury and property damage from an accident you caused. As per the National Association of Insurance Commissioners, insurance liability limits appear as three numbers, like 25/50/20, the exact split limits Illinois law requires (625 ILCS 5/7-203). This insurance policy does not repair your own car or own vehicle. Every insurance auto policy must meet these legal limits. This insurance coverage applies only after an at-fault accident.

Almost every state requires liability car insurance before you register a car. Insurance companies use insurance information from your driving record to set your premium. Liability coverage pays for someone else's medical bills, lost wages, and legal costs after a crash you caused.

What are the types of liability car insurance?

The types of liability car insurance are bodily injury liability and property damage liability. Drivers choose coverage like bodily injury liability and property damage liability. According to the Insurance Information Institute, bodily injury claims averaged $28,278 in 2024. Property damage liability claims averaged $6,770 the same year. This coverage helps cover repair costs for another driver's vehicle. Some states also require personal injury protection (PIP) in addition to liability coverage; Illinois does not mandate PIP but does require uninsured and underinsured motorist coverage on every policy, per the Illinois Department of Insurance.

Common types of liability car insurance coverage include:

• Bodily injury liability for another person's medical expenses and pain and suffering

• Property damage liability for another person's vehicle or property

• Combined single limit coverage that merges bodily injury and property damage

• Additional coverage like medical payments and legal costs

What is the benefit of liability car insurance?

The benefit of liability car insurance is financial protection after an at-fault accident. This coverage helps protect your finances after a crash. As reported by the Insurance Information Institute, insurers paid $132 billion in private passenger liability losses in 2024. Liability protection also keeps drivers legal in almost every state, including Illinois, where the Illinois Department of Insurance's 2025 Cost Containment Report shows the top 10 private passenger auto liability writers alone accounted for $3.7 billion in direct written premium and 65.2% of the state's market in 2024.

Key benefits of liability car insurance include:

• Helps pay medical expenses and lost wages for injured victims

• Provides legal defense if someone else sues after an accident

• Restores your savings and assets after a covered claim

• Strengthens your record by meeting what state law requires

• Encourages responsible driving through financial accountability

How does liability car insurance work?

Liability car insurance works by paying claims when you cause an accident. Your insurer investigates the crash and determines who is at fault. In the words of the National Association of Insurance Commissioners, liability limits are written in three numbers. The first two numbers show bodily injury per person and per accident. The third number shows property damage coverage in thousands of dollars. In Illinois, those numbers are set by statute at 25/50/20, and the Illinois Department of Insurance also requires uninsured motorist coverage of at least $25,000 per person and $50,000 per accident on every policy.

Here is how liability car insurance coverage work happens after a crash:

1. The insurer reviews the accident and confirms fault.

2. The insurance company pays the injured party up to your limits.

3. You pay any remaining cost beyond your coverage amount.

4. Your insurance rates keep increasing after a claim is paid.

What is the importance of liability car insurance?

The importance of liability car insurance is legal compliance and financial security. Driving without this coverage risks fines, license suspension, and lawsuits. Nationally, the Insurance Research Council found that a substantial share of drivers were uninsured or underinsured in 2023, and Illinois' own uninsured-driver rate that year ran close to 1 in 6 drivers, according to Insurance Research Council data cited by the Illinois Department of Insurance's licensed producers. Liability car insurance is something every driver needs for legal compliance. This gap makes liability car insurance important for every driver on the road.

Liability car insurance matters because it:

• Meets the legal code required by state law

• Protects drivers from paying out of pocket for damages

• Shields personal assets from a serious lawsuit

• Builds trust between drivers who share the road

How much does liability car insurance cost?

Liability car insurance cost depends on your state, driving record, and coverage limits. Insurance rates differ sharply based on where you live and drive. As indicated by the Insurance Information Institute, the national average auto insurance expenditure was $1,281 in 2023, and net premiums for auto liability insurance nationwide reached $173.2 billion that year. Illinois' own auto liability market moved in step with that trend: the Illinois Department of Insurance's Cost Containment Report to the General Assembly shows the state's private passenger physical damage market grew 17.3% in written premium during 2023, while Illinois represented 31.25% of all direct written auto premiums across the five-state Northeast Central region (Illinois, Indiana, Ohio, Michigan, and Wisconsin) that year.

Choosing higher liability limits raises your premium slightly but expands protection. Understanding these cost factors helps you find savings on your insurance quote.

What factors affect liability car insurance premiums?

Factors that affect liability car insurance premiums include driving history and coverage limits. Your zip code, age, and vehicle type also shape your insurance rates. In the words of the NAIC, the combined average premium rose 14.42% from 2022 to 2023 nationally. Insurers also weigh your driving record and any at-fault accidents. In Illinois specifically, insurers price policies partly around ZIP code risk factors: the Chicago metro area's vehicle theft volume, for instance, is a documented driver of higher comprehensive coverage costs there than in the rest of the state. Drivers often ask how much liability coverage is enough.

Common factors that affect liability car insurance premiums include:

• Your driving record and history of at-fault accidents

• The zip code and state where you register your car

• Your age, gender, and years of driving experience

• The coverage limits and liability limits you choose

• Your credit-based insurance score in most states

What is the difference between liability-only and full coverage car insurance?

The difference between liability-only and full coverage car insurance is what damage gets paid. Liability-only insurance pays for damage you cause to others only. Full coverage adds collision and comprehensive coverage for your own car. As referenced by ValuePenguin, liability-only insurance costs about $76 per month nationally.

Liability-only insurance policies typically include:

• Bodily injury liability and property damage liability only

• No repair money for your own vehicle after a crash

Full coverage policies typically add:

• Collision coverage for damage to your own car

• Comprehensive coverage for theft, fire, and weather damage

• Combined protection that exceeds state minimum coverage

What do split liability limits like 25/50/20 mean?

Split liability limits like 25/50/20 mean three separate dollar amounts for coverage, and this is the exact minimum Illinois law requires under 625 ILCS 5/7-203, as enforced by the Illinois Department of Insurance. The first number is bodily injury coverage per person. The second number is bodily injury coverage per accident. As outlined by the National Association of Insurance Commissioners, these three numbers appear in thousands of dollars.

The insurer will not pay beyond the maximum amount listed for each number. Choosing a single limit policy instead combines all three into one number.

Does liability car insurance cover your own vehicle?

Liability car insurance does not cover damage to your own vehicle. This coverage only pays for another person's injuries or property. As stated by the Insurance Information Institute, most insured drivers add extra coverage for their own car. Collision coverage repairs your own car after an at-fault crash. Comprehensive coverage protects your own vehicle from theft, fire, or weather, coverage that carries extra weight in Illinois, where the Chicago metro area ranks among the nation's highest for vehicle theft volume. Drivers who want protection for their own car must buy additional coverage. Insurance Navy helps drivers choose the right combination of policies. Bundling liability with collision and comprehensive coverage often lowers your total premium significantly.

How does an at-fault accident affect liability car insurance claims?

An at-fault accident affects liability car insurance claims by raising future costs. Your insurer pays the injured party up to your policy limits. Bodily injury claim severity has climbed substantially over the past decade nationally, per the Insurance Research Council. If damages exceed your coverage limits, you are personally responsible for the rest. If you're found at fault, your insurance rates typically increase. A poor driving record from an at-fault accident can raise premiums for years. Filing a claim promptly helps your insurer process payments faster for everyone involved.

What is umbrella insurance and how does it relate to liability car insurance?

Umbrella insurance is extra liability protection above your car insurance limits. It relates to liability car insurance by covering claims beyond your policy limits. According to the U.S. Chamber Institute for Legal Reform, 1,376 nuclear verdicts exceeded $10 million between 2010 and 2019. Large lawsuits like these can quickly exceed standard liability limits, which is one reason the Illinois Department of Insurance's shopping guide advises drivers to consider coverage above the state's 25/50/20 minimum.

An umbrella policy adds protection by:

• Extending liability coverage beyond your auto insurance policy limits

• Covering legal costs for major lawsuits after a serious crash

• Protecting personal assets like your home, condo, or savings

• Creating an extra layer of protection alongside your life insurance

Insurance Navy can help you find affordable umbrella and auto insurance together.

How does liability car insurance interact with uninsured motorist coverage?

Liability car insurance interacts with uninsured motorist coverage by covering different drivers. Your liability coverage pays for damage you cause to others. Uninsured motorist coverage pays you when another driver has no insurance. In Illinois, uninsured motorist coverage of at least $25,000 per person and $50,000 per accident is mandatory on every auto policy and cannot be waived, per the Illinois Department of Insurance, a rule with real teeth, since roughly 1 in 6 Illinois drivers carried no insurance in 2023. Underinsured motorist coverage pays you when the at-fault driver lacks enough coverage; under Illinois law, raising your uninsured motorist limit automatically raises your underinsured motorist limit to match, at no extra charge. Together, these coverages protect you whether you cause the crash or not. Comparing both coverages helps drivers stay protected on every trip.

Choosing higher coverage limits and a clean driving record can lower long-term costs. Insurance Navy helps drivers compare coverage options to find the best insurance rates.

Liability car insurance protects your finances and keeps you legal on the road. Insurance Navy helps American drivers find the right auto insurance at the right price. Our insurance company offers auto, home, condo, renters, pet, motorcycle, and life insurance under one roof. Call Insurance Navy today or enter your zip code online for a fast insurance quote. Our customer service team helps you find savings and choose coverage that fits your budget. Get real protection, real savings, and real customer service you can count on.