The short version
Your premium starts with the coverage you buy and is then adjusted for risk. Insurers use rating factors: characteristics that are statistically linked to how often claims happen and how expensive they tend to be. Each insurer weighs these factors differently, which is why quotes for the same driver and the same coverage can vary widely.
Insurance is regulated at the state level, so which factors are allowed, and how they can be used, depends on where you live.
| Factor | What insurers may consider | Can you influence it? |
|---|---|---|
| Location | ZIP code or territory, local claim, theft and repair costs | Limited |
| Age and experience | Age, years licensed | Over time |
| Driving record | Tickets, at-fault accidents, serious violations | Yes, over time |
| Vehicle | Make, model, year, repair costs, safety features | Yes, when buying |
| Coverage and limits | Coverage types and limit amounts | Yes |
| Deductible | Out-of-pocket amount per claim | Yes |
| Claims history | Prior insurance claims | Partly |
| Mileage and use | Annual miles, commuting or business use | Partly |
| Credit-based score | Where permitted by state law | Partly, over time |
| Other | Continuous coverage, drivers on the policy, discounts | Varies |
Location
Where your car is kept is one of the most influential factors. Areas with more traffic and accidents, higher vehicle theft or vandalism, more frequent lawsuits, or higher repair and medical costs tend to have higher rates. Weather risks such as hail or flooding can also raise the cost of comprehensive coverage.
Because pricing is often set by ZIP code or territory, moving even a short distance can change your premium.
Age and driving experience
Newer drivers, especially teens and drivers under 25, typically pay the most because inexperience is associated with more accidents. Rates often decline as drivers build experience, and they may change again later in life depending on the insurer.
Some states restrict which personal characteristics insurers may use, so the effect of age, gender or marital status is not the same everywhere.
Driving record
Speeding tickets, at-fault accidents and serious violations such as driving under the influence usually increase premiums. How much, and for how long, depends on the insurer and your state. Many insurers look back over the past three to five years.
- Minor violations typically have a smaller, shorter effect.
- At-fault accidents often have a larger effect than tickets.
- Serious violations can affect both your rate and whether an insurer will offer coverage, sometimes for several years.
Your vehicle
Insurers consider the make, model and year, including the vehicle's value, repair and parts costs, safety features, theft rates and performance. These matter most for collision and comprehensive coverage, which pay to repair or replace your own car.
If you are shopping for a car, it can help to get insurance quotes for the specific models you are considering before you buy.
Coverage types and limits
The coverage you choose has a direct effect on price. Common coverage types include:
- Liability pays for injuries and property damage you cause to others. Almost every state requires a minimum amount.
- Collision pays to repair your car after a crash, regardless of fault.
- Comprehensive covers non-collision events such as theft, fire, weather and hitting an animal.
- Uninsured/underinsured motorist protects you if the at-fault driver lacks enough insurance.
- Medical payments or personal injury protection helps with medical costs. Some states require it.
Higher limits cost more but provide more protection. If you lease or finance your car, your lender will usually require collision and comprehensive coverage. See Liability vs Full Coverage for a side-by-side comparison.
Deductible
Your deductible is what you pay out of pocket on a collision or comprehensive claim before your insurance pays the rest. A higher deductible usually lowers your premium, but it means paying more yourself after a claim. A practical approach is choosing an amount you could cover on short notice. Learn more in How Does an Auto Insurance Deductible Work?
Claims history
Past claims, particularly at-fault claims, can raise your premium. Insurers often check consumer claims databases that record prior auto and property claims. You can request a copy of your own report from these databases to check it for errors.
Mileage and how you use the car
The more you drive, the more exposure you have to accidents. Insurers may ask about annual mileage and whether the car is used for commuting, pleasure or business. Some insurers offer usage-based programs that track driving habits through an app or a plug-in device and may adjust your price based on the results.
Credit-based insurance scores
In many states, insurers may use a credit-based insurance score, which is different from the credit score lenders use. A few states, including California, Hawaii and Massachusetts, prohibit or significantly limit its use for auto insurance, and rules elsewhere vary. Practices also differ between insurers.
Other factors and discounts
Insurers may also consider whether you've had continuous coverage, your marital status or homeownership where permitted, and the drivers listed on your policy. Discounts can lower your price, though availability varies by insurer and state. Common examples include bundling policies, safe-driver and good-student discounts, vehicle safety features and paying in full.
Putting it together
No single factor sets your price. Insurers combine them using their own rating models, within the rules of your state. That's why the most useful comparison is between quotes for equivalent coverage: the same limits, deductibles and add-ons. Our guide on how to compare car insurance options walks through it step by step.
Frequently asked questions
Why did my rate go up when I didn't file a claim?
Rates can change at renewal for reasons beyond your own record, such as rising repair or medical costs in your area, an insurer's overall pricing changes, or updates to your vehicle or driver details. Your insurer can tell you which factors changed.
Do all insurers use the same rating factors?
Most insurers use similar categories, but each one weighs them differently within the rules of your state. That's why quotes for the same coverage can differ noticeably between companies.
Does my car's color affect my insurance?
Generally no. Insurers focus on the make, model, year, body type and repair costs, not the paint color.
How often should I review my car insurance?
A common approach is to review your coverage at renewal and after major changes, such as moving, buying a vehicle or adding a driver. Compare equivalent coverage when you do.
