Quick answer: Car insurance is made up of multiple separate coverages -- liability, collision, comprehensive, medical, uninsured motorist, and optional add-ons. Only liability is legally required in most states. The rest depends on your car's value, your risk tolerance, and your lender's requirements.

The six coverage types that make up a car insurance policy

Most people think of car insurance as one product. It's actually a bundle of separate coverages, each of which kicks in under different circumstances.

Liability coverage (required in most states)

Liability pays for damage you cause to others -- their vehicle, their property, or their medical bills. It does not cover your own car or injuries. State minimums are set per state and typically expressed as three numbers: 25/50/25 means $25,000 per injured person, $50,000 per accident total, $25,000 for property damage.

Minimum limits are often not enough. A serious accident with injuries can exceed $100,000 quickly. Most insurers recommend 100/300/100 as a practical floor if your assets are worth protecting.

Collision coverage (optional, but required by lenders)

Collision pays to repair or replace your car when you hit another vehicle or object -- regardless of fault. If you have a car loan or lease, your lender requires collision.

At what point should you drop collision? A common rule: if your annual collision premium is more than 10% of your car's current market value, dropping it may make financial sense. A car worth $4,000 with a $500 annual collision premium is borderline; one worth $2,000 is past it.

Comprehensive coverage (optional, but required by lenders)

Comprehensive pays for damage not caused by a collision -- theft, vandalism, hail, fire, flood, hitting an animal. Like collision, lenders require it. Comprehensive deductibles can be set as low as $0, though that increases your premium.

Medical payments / personal injury protection (state-specific)

Medical payments (MedPay) covers your and your passengers' medical bills regardless of fault. In no-fault states, personal injury protection (PIP) is required and provides broader coverage including lost wages. In at-fault states, MedPay is usually optional.

If you have strong health insurance, MedPay may be redundant. If you have a high-deductible health plan, a modest MedPay limit ($5,000-$10,000) fills the gap.

Uninsured/underinsured motorist coverage (UM/UIM)

UM covers your costs when the at-fault driver has no insurance. UIM covers the gap when they have too little insurance. About 13% of drivers in the US are uninsured. UM/UIM is required in roughly 20 states and cheap enough to add in the others -- usually $20-$40/year.

Gap insurance

If you owe more on your loan than your car is worth, gap insurance covers the difference after a total loss. Dealers often offer it at inflated prices; your insurer usually offers the same coverage for $20-$40/year. Once your loan balance drops below your car's value, cancel gap. See: gap insurance explained.

What state minimums mean -- and why they often fall short

Every state except New Hampshire requires some form of liability coverage. Minimum limits vary widely:

• Florida: 10/20/10 (among the lowest)
• California: 15/30/5 (being raised in 2025)
• New York: 25/50/10
• Alaska: 50/100/25 (among the highest)

Minimums are designed to protect other people on the road, not you. Carry at least 100/300/100 in liability if your assets are worth protecting.

The optional add-ons that are usually worth it

A few add-ons provide significant value relative to their cost:

• Rental reimbursement: Pays for a rental while your car is being repaired. Usually $30-$60/year.
• Roadside assistance: Towing, battery, lockout service. Usually $10-$30/year. Worth adding unless you have AAA or a similar membership.
• New car replacement: If your car is totaled in the first 1-2 model years, you get a check for a new equivalent car, not the depreciated value. Only available on new vehicles.

Add-ons usually not worth it: accident forgiveness (the premium increase often exceeds what you'd pay out of pocket), diminishing deductible programs (the math rarely works in your favor).

How deductibles affect your premium

Your collision and comprehensive deductibles directly control your premium. Raising your collision deductible from $250 to $1,000 typically reduces that portion of your premium by 15-30%. The trade-off: you pay more out-of-pocket per claim.

If you have $1,000 in savings, raising your deductible to $1,000 is usually a good trade. If you don't, keep a lower deductible to avoid financial strain after an accident.

See your declarations page to understand exactly what's in your current policy.

Frequently asked questions

What is the minimum car insurance required by law?

In most states, liability insurance is the only legal requirement. No-fault states additionally require PIP. New Hampshire requires no insurance but mandates that you can financially cover accidents you cause.

Does car insurance follow the car or the driver?

Car insurance primarily follows the car. If you lend your car to someone and they cause an accident, your insurance pays -- not theirs. Regular drivers of your vehicle should be listed on your policy.

Does filing a claim raise my car insurance rates?

Usually yes, especially for at-fault accidents. Rate increases vary by insurer but commonly run 20-50% for an at-fault accident. See: will filing an insurance claim raise my rates for when paying out of pocket is smarter.

How do I know how much car insurance I need?

Start with at least 100/300/100 liability. Add collision and comprehensive if your car is worth more than $10,000 or if you have a loan or lease. Add UM/UIM unless your state already requires it.

What does "full coverage" mean?

"Full coverage" is informal shorthand for having liability plus collision plus comprehensive. It does not mean your insurer will pay for everything. Read your declarations page to understand exactly what your policy covers.