The consumer may be protected with different coverage types depending on what coverage the insured purchases.
In the United States, liability insurance covers claims against the policy holder and generally, any other operator of the insured’s vehicle, provided they do not live at the same address as the policy holder and are not specifically excluded on the policy. In the case of those living at the same address, they must specifically be covered on the policy. Thus it is necessary for example, when a family member comes of driving age they must be added on to the policy. Liability insurance sometimes does not protect the policy holder if they operate any vehicles other than their own. When you drive a vehicle owned by another party, you are covered under that party’s policy. Non-owners policies may be offered that would cover an insured on any vehicle they drive. This coverage is available only to those who do not own their own vehicle and is sometimes required by the government for drivers who have previously been found at fault in an accident.
Generally, liability coverage does extend when you rent a car. Comprehensive policies ("full coverage") usually also apply to the rental vehicle, although this should be verified beforehand. Full coverage premiums are based on, among other factors, the value of the insured’s vehicle. This coverage may not apply to rental cars because the insurance company does not want to assume responsibility for a claim greater than the value of the insured’s vehicle, assuming that a rental car may be worth more than the insured’s vehicle. Most rental car companies offer insurance to cover damage to the rental vehicle. These policies may be unnecessary for many customers as credit card companies, such as Visa and MasterCard, now provide supplemental collision damage coverage to rental cars if the transaction is processed using one of their cards. These benefits are restrictive in terms of the types of vehicles covered.
Liability
Liability coverage provides a fixed dollar amount of coverage for damages that an insured becomes legally liable to pay due to an accident or other negligence. For example, if an insured drives into a telephone pole and damages the pole, liability coverage pays for the damage to the pole. In this example, the insured also may become liable for other expenses related to damaging the telephone pole, such as loss of service claims (by the telephone company).
Liability coverage is available either as a combined single limit policy or as a split limit policy:
Combined Single Limit
A combined single limit combines property damage liability coverage and bodily injury coverage under one single combined limit. For example, an insured with a combine single liability limit strikes another vehicle and injures the driver and the passenger. Payments for the damages to the other driver's car, as well as payments for injury claims for the driver and passenger, would be paid out under this same coverage.
Split Limits
A split limit liability coverage policy splits the coverage's into property damage coverage and bodily injury coverage. In the example given above, payments for the other driver's vehicle would be paid out under property damage coverage, and payments for the injuries would be paid out under bodily injury coverage.
Note that bodily injury liability coverage is also usually split as well into a maximum payment per person and a maximum payment per accident.
Collision
Collision coverage provides coverage for an insured's vehicle that is involved in an accident, subject to a deductible. This coverage is designed to provide payments to repair the damaged vehicle, or payment of the cash value of the vehicle if it is not repairable. Collision coverage is optional. Collision Damage Waiver (CDW) is the term used by rental car companies for collision coverage.
Comprehensive
Comprehensive (a.k.a. - Other Than Collision) coverage provides coverage, subject to a deductible, for an insured's vehicle that is damaged by incidents that are not considered Collisions. For example, fire, theft (or attempted theft), vandalism, weather, or impacts with animals are just some types of Comprehensive losses.
Uninsured/Underinsured Coverage
Uninsured/Underinsured coverage, also known as UM/UIM, provides coverage if another at-fault party either does not have insurance, or does not have enough insurance. In effect, your insurance company acts as at fault party's insurance company.
In the United States, the definition of an uninsured/underinsured motorist, and corresponding coverage's, are set by state laws.
