At the most basic level, initial ratemaking involves looking at the frequency and severity of insured perils and the expected average payout resulting from these perils. Thereafter an insurance company will collect historical loss data, bring the loss data to present value, and compare these prior losses to the premium collected in order to assess rate adequacy.[24] Loss ratios and expense loads are also used. Rating for different risk characteristics involves at the most basic level comparing the losses with "loss relativities"—a policy with twice as many losses would therefore be charged twice as much. More complex multivariate analyses are sometimes used when multiple characteristics are involved and a univariate analysis could produce confounded results. Other statistical methods may be used in assessing the probability of future losses.
Comprehensive and collision auto insurance coverage, on the other hand, are tied to the insured vehicle (they follow the car). These coverages pay for damage that befalls the insured vehicle as a result of an accident or vandalism. One could say that if you loan your vehicle, you loan your insurance. With comprehensive insurance which covers almost everything, it is the car rather than the driver that is covered. This, however, requires many stipulations to be put in place, such as who is allowed to drive the car. If someone other than the insured is driving a vehicle covered by comprehensive coverage and is not listed as a covered driver – even if the other person has permission – the other person might not be covered in an accident. Family members (such as children or a spouse) are generally already included in the policy definition of “insured.” However, rarely will insurance cover a driver operating a vehicle without the owner’s permission.
Often a commercial insured's liability insurance program consists of several layers. The first layer of insurance generally consists of primary insurance, which provides first dollar indemnity for judgments and settlements up to the limits of liability of the primary policy. Generally, primary insurance is subject to a deductible and obligates the insured to defend the insured against lawsuits, which is normally accomplished by assigning counsel to defend the insured. In many instances, a commercial insured may elect to self-insure. Above the primary insurance or self-insured retention, the insured may have one or more layers of excess insurance to provide coverage additional limits of indemnity protection. There are a variety of types of excess insurance, including "stand-alone" excess policies (policies that contain their own terms, conditions, and exclusions), "follow form" excess insurance (policies that follow the terms of the underlying policy except as specifically provided), and "umbrella" insurance policies (excess insurance that in some circumstances could provide coverage that is broader than the underlying insurance).[36]
The numbers we cite above are reflective of a 30 year old male driver who has a clean driving record and is single. Your own rates will change based on your own driving history and profile. The best way to determine who will give you the most affordable auto insurance is by comparison shopping. To start looking at car insurance quotes, put your zip code in one of the two boxes up top.

Liability insurance coverage on a personal auto policy follows the driver no matter whose vehicle is being operated, provided it is an eligible vehicle. All states, except for one (New Hampshire), require at least liability coverage. Liability coverage protects the insured (i.e., follows the driver) when the insured operates a vehicle owned by someone else. In such a situation, they will still usually be covered under their own auto insurance policy. However, the best rule of thumb in looking for coverage under a policy is to begin with the exclusions.
In the European Union, the Third Non-Life Directive and the Third Life Directive, both passed in 1992 and effective 1994, created a single insurance market in Europe and allowed insurance companies to offer insurance anywhere in the EU (subject to permission from authority in the head office) and allowed insurance consumers to purchase insurance from any insurer in the EU.[48] As far as insurance in the United Kingdom, the Financial Services Authority took over insurance regulation from the General Insurance Standards Council in 2005;[49] laws passed include the Insurance Companies Act 1973 and another in 1982,[50] and reforms to warranty and other aspects under discussion as of 2012.[51]
There are also companies known as "insurance consultants". Like a mortgage broker, these companies are paid a fee by the customer to shop around for the best insurance policy amongst many companies. Similar to an insurance consultant, an 'insurance broker' also shops around for the best insurance policy amongst many companies. However, with insurance brokers, the fee is usually paid in the form of commission from the insurer that is selected rather than directly from the client.
When an insured borrows a vehicle from a friend, the insured’s liability coverage usually steps in only when the insured’s policy limits are exceeded. Collision and comprehensive coverage do not apply to a borrowed vehicle. Medical Payments (Med Pay) and Personal Injury Protection (PIP) coverage, as we will see below, also follow the insured into a borrowed vehicle.
The key difference in collision vs. comprehensive coverage is that, to a certain extent, the element of the car driver's control. As we have stated before, collision insurance will typically cover events within a motorist's control, or when another vehicle collides with your car. Comprehensive coverage generally falls under "acts of God or nature," that are typically out of your control when driving. These can include such events as a spooked deer, a heavy hailstorm, or a carjacking.
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