When the premium is not mandated by the government, it is usually derived from the calculations of an actuary, based on statistical data. The premium can vary depending on many factors that are believed to affect the expected cost of future claims. Those factors can include the car characteristics, the coverage selected (deductible, limit, covered perils), the profile of the driver (age, gender, driving history) and the usage of the car (commute to work or not, predicted annual distance driven).
Under the cents-per-mile system, rewards for driving less are delivered automatically, without the need for administratively cumbersome and costly GPS technology. Uniform per-mile exposure measurement for the first time provides the basis for statistically valid rate classes. Insurer premium income automatically keeps pace with increases or decreases in driving activity, cutting back on resulting insurer demand for rate increases and preventing today's windfalls to insurers, when decreased driving activity lowers costs but not premiums.
More commonly purchased is third party, fire and theft. This covers all third party liabilities and also covers the vehicle owner against the destruction of the vehicle by fire (whether malicious or due to a vehicle fault) and theft of the insured vehicle. It may or may not cover vandalism. This kind of insurance and the two preceding types do not cover damage to the vehicle caused by the driver or other hazards.
Motor vehicle insurance, also called automotive insurance, a contract by which the insurer assumes the risk of any loss the owner or operator of a car may incur through damage to property or persons as the result of an accident. There are many specific forms of motor vehicle insurance, varying not only in the kinds of risk that they cover but also in the legal principles underlying them.
In September 2012, it was announced that the Competition Commission had launched an investigation into the UK system for credit repairs and credit hire of an alternative vehicle leading to claims from third parties following an accident. Where their client is considered to be not at fault, Accident Management Companies will take over the running of their client's claim and arrange everything for them, usually on a 'No Win - No Fee' basis. It was shown that the insurers of the at-fault vehicle, were unable to intervene in order to have control over the costs that were applied to the claim by means of repairs, storage, vehicle hire, referral fees and personal injury. The subsequent cost of some items submitted for consideration has been a cause for concern over recent years as this has caused an increase in the premium costs, contrary to the general duty of all involved to mitigate the cost of claims. Also, the recent craze of "Cash for crash" has substantially raised the cost of policies. This is where two parties arrange a collision between their vehicles and one driver making excessive claims for damage and non-existent injuries to themselves and the passengers that they had arranged to be "in the vehicle" at the time of the collision. Another recent development has seen crashes being caused deliberately by a driver "slamming" on their brakes so that the driver behind hits them, this is usually carried out at roundabouts, when the following driver is looking to the right for oncoming traffic and does not notice that the vehicle in front has suddenly stopped for no reason. The 'staging' of a motor collision on the Public Highway for the purpose of attempting an insurance fraud is considered by the Courts to be organised crime and upon conviction is dealt with as such.
In New South Wales, each vehicle must be insured before it can be registered. It is often called a 'greenslip,' because of its colour. There are six licensed CTP insurers in New South Wales. Suncorp holds licences for GIO and AAMI and Allianz holds Allianz and CIC Allianz licences. The remaining two licences are held by QBE and NRMA Insurance (NRMA). APIA and Shannons and InsureMyRide insurance also supply CTP insurance licensed by GIO.