Most drivers know they have car insurance but have only a vague idea of what it actually covers until they need to file a claim. At that point, the gaps between what they assumed was covered and what their policy actually covers can be a significant and expensive surprise.
This guide breaks down each major coverage type in plain terms, explains what each covers and what it explicitly excludes, and helps you identify whether your current coverage matches your actual risk exposure.
For drivers who want to understand which coverage combinations other drivers have found worthwhile at different price points, the insurance community has ongoing discussions about real coverage decisions and the claims experiences that followed.
Liability coverage: what it covers and what it does not
Liability insurance is the core of every auto policy and is required by law in all US states except New Hampshire and Virginia (which have alternatives). It has two components:
- Bodily injury liability (BI): Pays for medical expenses, lost wages, and pain and suffering for other people you injure in an accident you cause. This covers the other driver, their passengers, and pedestrians. It does NOT cover your own injuries.
- Property damage liability (PD): Pays for damage you cause to other people’s property, including vehicles, fences, buildings, and other structures. It does NOT cover damage to your own vehicle.
Liability limits are expressed as three numbers, for example 100/300/100, meaning $100,000 bodily injury per person, $300,000 bodily injury per accident total, and $100,000 property damage. The state minimum limits are often far below what a serious accident actually costs.
Collision coverage: what it covers and what it does not
Collision coverage pays to repair or replace your own vehicle after a collision with another vehicle or object, regardless of fault. It covers:
- Collisions with other vehicles: Whether you caused the accident or the other driver did (though if the other driver was at fault, your insurer may pursue their insurer for reimbursement).
- Single-vehicle accidents: Hitting a guardrail, a tree, a pothole that causes damage, or rolling your vehicle.
- Hit and run damage to your vehicle: In most states, collision coverage applies when an unidentified vehicle damages yours.
Collision does NOT cover: weather damage, theft, animal strikes, or damage from anything other than a collision. Those fall under comprehensive.
Comprehensive coverage: what it covers and what it does not
Comprehensive covers damage to your vehicle from causes other than a collision. The list is broad:
- Theft: If your vehicle is stolen, comprehensive pays the actual cash value.
- Weather damage: Hail, flooding, wind damage, and falling trees or branches.
- Fire: Vehicle fire regardless of cause.
- Animal strikes: Hitting a deer or other animal is a comprehensive claim, not collision.
- Vandalism: Keying, broken windows, and intentional damage by others.
- Falling objects: A tree branch, a rock off a truck, or debris from a construction site.
Comprehensive does NOT cover: mechanical breakdown, normal wear and tear, or earthquake damage (which requires a separate endorsement in some states). Personal items stolen from inside a vehicle are typically covered by homeowners or renters insurance, not auto comprehensive.
Uninsured and underinsured motorist coverage
- Uninsured motorist (UM): Pays for your medical expenses and sometimes vehicle damage when you are hit by a driver who has no insurance. Essential in states with high uninsured driver rates.
- Underinsured motorist (UIM): Pays when the at-fault driver has insurance but not enough to cover your full damages. If someone with $25,000 in bodily injury liability causes $80,000 in medical expenses, UIM covers the remaining $55,000 up to your UIM limit.
UM and UIM are required in some states, optional in others. Given that roughly 13% of US drivers are uninsured nationally and many carry only state minimum limits, these coverages are among the most valuable optional add-ons available.
Personal injury protection and medical payments
- Personal injury protection (PIP): Required in no-fault states (Florida, Michigan, New York, etc.). Pays for your medical expenses and lost wages after an accident regardless of fault. Covers you and passengers in your vehicle. Limits vary by state but typically start at $10,000-$50,000.
- Medical payments (MedPay): Similar to PIP but simpler and available in at-fault states as an optional add-on. Covers medical expenses for you and passengers in your vehicle after an accident, regardless of fault. Does not cover lost wages.
What car insurance never covers
Regardless of coverage type, standard auto policies exclude:
- Mechanical breakdown and wear and tear: Engine failure, transmission problems, and normal deterioration of parts are not insured events. This is what warranties and extended service contracts cover.
- Commercial use without endorsement: If you use your personal vehicle for rideshare driving, delivery, or other commercial purposes without a rideshare endorsement, claims arising from commercial use will likely be denied.
- Intentional damage: Intentionally damaging your own vehicle is not a covered loss.
- Racing: Damage occurring while participating in any form of racing or speed competition is excluded.
- Custom equipment without endorsement: Aftermarket modifications, custom paint, added audio equipment, and performance upgrades are often excluded from standard collision and comprehensive unless specifically scheduled on the policy.
- Nuclear or war events: Standard exclusion in virtually all insurance policies.
Coverage gaps that surprise drivers at claim time
The most painful insurance education often happens after a claim is denied. The thread on cheapest car insurance includes a range of real driver experiences with coverage gaps and claim denials that are useful to read before you assume something is covered.
- Rental car after an accident: Your liability coverage pays for a rental for the OTHER driver after an accident you caused. Your own rental reimbursement coverage (an optional add-on) pays for your rental while your vehicle is being repaired after a collision or comprehensive claim.
- Gap between actual cash value and loan balance: If your vehicle is totaled, comprehensive and collision pay actual cash value, which depreciates from the moment you drive off the lot. If you owe more than the vehicle is worth, gap insurance covers the difference.
- Personal items in the vehicle: Laptops, phones, cameras, and other personal items stolen from or damaged in your vehicle are typically not covered by auto insurance. File those claims under homeowners or renters insurance.
- Rideshare period 1 gap: Personal auto policies exclude coverage when the rideshare app is on and you are waiting for a ride request. Rideshare company insurance is also limited during this period. A rideshare endorsement from your personal insurer fills this gap.
How to read your declarations page
Your declarations page (the summary page of your policy) shows exactly what coverages you have and at what limits. Know how to read it:
| Line item | What it means |
| BI 100/300 | Bodily injury: $100k per person / $300k per accident |
| PD 100 | Property damage: $100k per accident |
| UM/UIM 100/300 | Uninsured/underinsured motorist: same limits as BI |
| Comp $500 ded | Comprehensive with $500 deductible |
| Coll $1,000 ded | Collision with $1,000 deductible |
| PIP $10,000 | Personal injury protection: $10k limit |
| Rental $40/day/$1,200 max | Rental reimbursement: $40 per day up to $1,200 total |
FAQs
Does car insurance cover a stolen car?
Yes, if you have comprehensive coverage. Comprehensive pays the actual cash value of the vehicle at the time of theft. Standard liability coverage does not cover vehicle theft.
Does car insurance cover hitting a deer?
Yes, under comprehensive coverage. Animal strikes are classified as a comprehensive claim, not a collision claim. This matters because the deductibles may differ and filing a collision claim can affect rates differently than a comprehensive claim.
Am I covered if someone else drives my car?
In most cases, yes. Auto insurance generally follows the vehicle, not the driver. If someone drives your vehicle with your permission, your insurance is typically the primary coverage. If that driver has their own insurance, it may apply as secondary coverage. Excluded drivers listed on your policy are not covered.
Does car insurance cover a cracked windshield?
Yes, under comprehensive coverage. Many insurers offer zero-deductible glass coverage as an add-on, which means windshield replacement with no out-of-pocket cost. This is worth adding in states where road debris and hail are common.