Car insurance is a contract between you and an insurer that pays for damage or injury you cause, damage to your own car, and medical costs after an accident

When you buy car insurance, you're buying protection against financial loss. The insurer agrees to pay certain costs if you're in an accident, hit someone else's property, or face theft or weather damage. In return, you pay a monthly or annual premium. The policy spells out exactly what the insurer will pay for, how much they'll pay, and what situations they won't cover.

Most states require you to carry at least liability insurance before you can legally drive. That covers damage or injury you cause to someone else. Beyond that, you choose what other coverage to add based on your car's value, how much debt you owe on it, and your own financial situation. A financed car requires comprehensive and collision coverage. An older paid-off car might need only liability.

Key Takeaways

  • Liability insurance covers damage or injury you cause to someone else and is required by law in most states.
  • Collision and comprehensive coverage protect your own car from accidents, theft, and weather, and are required if you have a loan or lease.
  • Your policy includes a deductible — the amount you pay out of pocket before insurance kicks in — and a coverage limit, which is the maximum the insurer will pay.
  • Medical payments coverage and uninsured motorist coverage protect you and your passengers if you're hit by someone without insurance or if someone in your car is injured.
  • Your premium depends on your driving record, age, location, the car you drive, and the coverage limits and deductibles you choose.

Liability coverage: what you pay if you cause an accident

Liability insurance is the foundation of every car insurance policy. It pays for damage to someone else's car, their medical bills, and property damage (like a fence or storefront) if you're found at fault in an accident. If you cause a crash that injures three people and damages two cars, liability coverage pays for all of it — up to your coverage limit.

States set minimum liability limits, but those minimums are often too low to protect you if you cause a serious accident. A typical minimum might be $25,000 per person and $50,000 per accident for bodily injury, plus $25,000 for property damage. If you cause $100,000 in damage and your limit is $50,000, you're personally responsible for the remaining $50,000. That's why many people carry higher limits — $100,000 or $250,000 per person — especially if they have assets to protect.

Collision and comprehensive coverage: protecting your own car

Collision coverage pays to repair or replace your car if you hit another vehicle, a tree, a guardrail, or any other object. It covers accidents you cause and accidents caused by someone else. If you finance or lease a car, your lender requires collision coverage.

Comprehensive coverage pays for damage from events you didn't cause: theft, vandalism, weather (hail, flooding, wind), hitting an animal, or glass breakage. It does not cover accidents. If a tree falls on your parked car or someone steals your wheels, comprehensive pays for it. Like collision, comprehensive is required if you have a loan or lease.

Both collision and comprehensive come with a deductible. If your deductible is $500 and a hailstorm damages your car for $3,000, you pay $500 and insurance pays $2,500. Choosing a higher deductible ($1,000 instead of $500) lowers your monthly premium, but you pay more out of pocket when you file a claim.

Deductibles and coverage limits: what you pay and what insurance pays

Every insurance policy has two numbers that control your costs: the deductible and the coverage limit. The deductible is what you pay when you file a claim. The coverage limit is the maximum the insurer will pay. If your liability limit is $100,000 and you cause $150,000 in damage, you pay the extra $50,000.

Deductibles typically range from $250 to $1,000 for collision and comprehensive. Liability doesn't have a deductible — you don't pay anything out of pocket for a liability claim. Choosing a higher deductible saves you money on your monthly premium but means you'll pay more if you need to file a claim. Choosing a lower deductible costs more each month but protects you if an accident happens.

Coverage limits vary widely. You set them when you buy the policy. Higher limits cost more per month but protect you better if you cause a serious accident or if someone sues you. Many people increase their limits when they have significant assets, a mortgage, or savings they want to protect.

Medical payments and uninsured motorist coverage: protecting you and your passengers

Medical payments coverage (sometimes called MedPay) pays medical bills for you and your passengers after an accident, regardless of who caused it. It covers hospital visits, surgery, dental work, and ambulance fees. It does not cover lost wages or pain and suffering. If you're in an accident and need emergency care, MedPay covers those costs up to your limit, usually $1,000 to $5,000 per person.

Uninsured motorist coverage protects you if you're hit by a driver who has no insurance or whose insurance doesn't cover the full cost of your injuries. It pays for your medical bills and vehicle damage up to your coverage limit. If an uninsured driver causes an accident that injures you and damages your car, uninsured motorist coverage pays instead of the other driver's insurance. Underinsured motorist coverage works the same way but applies when the other driver's insurance limit is too low to cover your costs.

These two coverages protect you in situations where the other driver can't or won't pay. They're optional in most states but strongly recommended, especially if you don't have substantial health insurance or savings to cover accident costs.

What car insurance does not cover

Car insurance does not cover routine maintenance, wear and tear, or mechanical breakdown. If your engine fails or your transmission needs repair, that's on you. Insurance also does not cover damage you cause while driving under the influence, racing, or using the car for commercial purposes (like rideshare or delivery) if your policy excludes it.

If you cause an accident intentionally or commit insurance fraud, the insurer can deny your claim and cancel your policy. Insurance also does not cover damage to your car if you lend it to someone who causes an accident — though the claim would typically go through the driver's insurance, not yours. Rental cars and borrowed vehicles may or may not be covered depending on your policy; check with your insurer before driving someone else's car.

How your premium is calculated

Your monthly or annual premium depends on several factors. Your driving record is the biggest one — accidents and traffic violations raise your rate. Your age matters: drivers under 25 and over 70 typically pay more. Your location affects rates because some areas have more accidents or theft. The car you drive influences cost: expensive cars and high-performance vehicles cost more to insure than reliable, affordable cars.

Your coverage choices also change your premium. Higher liability limits, lower deductibles, and additional coverages like MedPay all increase your monthly cost. Bundling car insurance with home or renters insurance often qualifies you for a discount. Many insurers also offer discounts for good driving records, completing a defensive driving course, or paying your premium in full upfront instead of monthly.

Frequently Asked Questions

What's the difference between actual cash value and agreed value?

Actual cash value is what your car is worth on the used market right now, accounting for age and mileage. Agreed value is an amount you and the insurer decide on together, usually for classic or collectible cars. With actual cash value, the insurer pays what the car is worth at the time of loss, which may be less than you owe if you financed it. Agreed value guarantees a set payout.

Do I need to carry insurance on a car I don't drive?

If the car is registered and parked on a public road, most states require at least liability coverage. If it's stored in a garage and not driven, you may be able to suspend coverage temporarily, but check with your insurer first. Some insurers offer storage or non-use policies for vehicles not in regular use.

What happens if I let my insurance lapse?

Driving without insurance is illegal in most states and can result in fines, license suspension, and legal liability if you cause an accident. If you cause damage while uninsured, you pay for it yourself. Restarting coverage after a lapse may result in higher premiums or a requirement to file an SR-22 form, which proves you're insured.

Can I change my coverage limits or deductible after I buy the policy?

Yes. You can contact your insurer anytime to adjust your coverage limits or deductible. Changes usually take effect immediately or within a few days. Increasing your deductible or lowering your limits lowers your premium; decreasing your deductible or raising your limits raises it.

What should I do right after an accident?

Move to safety if possible, call police if anyone is injured or there's significant damage, exchange contact and insurance information with the other driver, take photos of the damage and the scene, and get contact information from witnesses. Then contact your insurer as soon as you can to report the accident and start the claim process.