Property damage liability

This coverage pays for damage you (or someone driving the car with your permission) may cause to someone else's property. Usually, this means damage to someone else's car, but it also includes damage to lamp posts, telephone poles, fences, buildings, or other structures your car hit.

Collision

This coverage pays for damage to your car resulting from a collision with another car, object, or as a result of flipping over. It also covers damage caused by potholes. Collision coverage is generally sold with a deductible of $250 to $1,000—the higher your deductible, the lower your premium. Even if you are at fault for the accident, your collision coverage will reimburse you for the costs of repairing your car, minus the deductible. If you're not at fault, your insurance company may try to recover the amount they paid you from the other driver's insurance company. If they are successful, you'll also be reimbursed for the deductible.

Comprehensive

This coverage reimburses you for loss due to theft or damage caused by something other than a collision with another car or object, such as fire, falling objects, missiles, explosion, earthquake, windstorm, hail, flood, vandalism, riot, or contact with animals such as birds or deer.

Comprehensive insurance is usually sold with a $100 to $300 deductible, though you may want to opt for a higher deductible as a way of lowering your premium.

Comprehensive insurance will also reimburse you if your windshield is cracked or shattered. Some companies offer glass coverage with or without a deductible.

States do not require that you purchase collision or comprehensive coverage, but if you have a car loan, your lender may insist you carry it until your loan is paid off.