Affordable auto insurance starts here

What a car insurance policy is actually made of

A policy is not one product. It is a set of separate coverages sold together, each with its own limit and, in several cases, its own deductible. Comparing two quotes without knowing which coverages differ is the most common way to buy the wrong one.

Liability is the part your state requires and the part that protects everything you own. The rest protects the car, or fills gaps the liability section was never meant to cover.

• Bodily injury liability - injury you cause to other people
• Property damage liability - damage you cause to other people's property
• Collision - damage to your own car from a collision, whoever was at fault
• Comprehensive - damage to your own car from almost anything else: theft, fire, hail, flood, a falling tree, an animal
• Uninsured and underinsured motorist - when the person who hit you cannot pay for it
• Medical payments or personal injury protection, depending on where you live
• Extras such as rental reimbursement, roadside assistance and gap coverage

Liability limits are the decision that matters most

Every state that requires insurance sets a minimum liability limit, and those minimums were generally set a long time ago. They have not kept pace with what a modern vehicle costs to replace or what a serious injury costs to treat.

Liability is what stands between an at-fault accident and your savings. When the limit is exhausted, the claim does not stop - it continues against you personally. Raising a liability limit is usually one of the least expensive changes you can make to a policy, because the probability of a catastrophic claim does not rise in proportion to the limit.

If one number on your policy deserves five minutes of attention, this is it. Look at what you would stand to lose, and ask what it costs to raise the limit to cover it.

"Full coverage" is not a product anyone sells

No insurer offers a product called full coverage. It is shorthand, and it usually means liability plus collision plus comprehensive.

The phrase causes real problems because it implies completeness. A policy described as full coverage can still leave you without a rental car after a claim, without roadside assistance, without gap coverage on a financed vehicle, and with liability limits that would be exhausted by a single serious accident.

When someone quotes you full coverage, the useful response is to ask which coverages are included and at what limits.

Deductibles: the trade you are actually making

Your deductible is what you pay toward a covered claim before the insurer pays anything. Raising it lowers your premium and increases what you are exposed to on the day something happens.

The question that settles it is not which is cheaper. It is whether you could pay the higher deductible, at short notice, without it causing a problem. If the answer is no, the saving is not real - you have moved a cost you can predict into one you cannot.

Collision and comprehensive usually carry separate deductibles, and they do not have to match. Some policies also apply a different deductible to glass, or to wind and hail.

What actually moves your premium

Rates are built from the characteristics of the driver, the vehicle, the location and the coverage chosen. Some of that you control and some of it you do not, and it is worth knowing which is which before spending effort in the wrong place.

The largest movable factors are usually the coverages and limits you select, the deductibles you accept, the vehicle you drive, and the discounts you qualify for but have never been asked about. Insurers do not generally volunteer discounts - it is worth asking for a discount review by name at renewal.

• Driving record, and how long an incident stays in rating - which varies by insurer
• The vehicle itself: repair cost, parts availability and safety equipment matter more than horsepower
• How far and how often you drive, and whether the car is used for work
• Where the car is kept overnight
• Coverage selections, limits and deductibles
• Where permitted, a credit-based insurance score - which is not your lending credit score

When it stops making sense to insure the car itself

Collision and comprehensive both pay out based on what the vehicle is worth, and both are capped by that value. On an older car there comes a point where the premium for those coverages, plus the deductible you would pay, approaches what the insurer would ever hand over after a total loss.

That is the point to reconsider - not a fixed age or mileage. Liability, uninsured motorist and medical coverages are unaffected by the car's value and should generally stay regardless.

Comprehensive usually outlasts collision, because it costs less and covers the events that are not about how you drive.

How to compare two quotes properly

Two quotes are only comparable if the coverages, limits and deductibles match. A cheaper quote is frequently a different policy rather than a better price for the same one.

Put the declarations pages side by side and check the liability limits first, then the deductibles, then what is present on one and absent on the other. Only after that does the premium tell you anything useful.

What to do after an accident

The first hour shapes the claim more than anything that follows, and it is the hour you are least equipped to think clearly in. Knowing the sequence in advance is most of the benefit.

Report it even where you are unsure whether you will claim. Reporting an incident and filing a claim are not the same thing, and how each is recorded varies between insurers - it is worth asking yours how they treat the distinction before you ever need to know. A claim that surfaces months later, after the other party has decided to pursue it, is considerably harder to handle than one your insurer has known about from the first day.

• Make sure everyone is safe and get medical attention where there is any doubt
• Call the police where anyone is injured, where another party is involved, or where your state requires it
• Photograph everything: both vehicles, the position they came to rest in, the wider scene, road conditions and any visible injuries
• Exchange names, contact details, insurer and policy numbers - not opinions about fault
• Take contact details for any independent witness, because they become impossible to find later
• Keep your own record of the claim: who you spoke to, when, and what was agreed

Telematics and usage-based programmes

Most insurers now offer a programme that prices on how and how much you actually drive, measured through an app or a device, rather than only on the proxies used at quote time.

For low-mileage drivers and for drivers whose record understates them, these can be worth real money. The variables typically monitored are mileage, time of day, harsh braking and acceleration, and phone handling while driving.

Two things worth knowing before enrolling. Ask whether the programme can only lower your rate or whether it can raise it, because that varies. And ask what happens to the data, how long it is retained, and whether it could be used in a claim.

If you disagree with a claim decision

Ask for the decision in writing, with the specific policy language it rests on. A great many disagreements turn out to be about how an incident was recorded rather than about coverage.

Most insurers have a formal internal appeal, and a second look with better documentation resolves more claims than people expect. Beyond that, every state has a department of insurance that handles complaints about how a claim was handled, and filing one is free.