How Car Insurance Rates Are Determined
Two drivers on the same street can pay very different premiums for similar cover. Insurers price a policy from many factors at once, and which ones they may legally use depends on the state. Here is a plain look at what usually goes into the number.
Factors about the driver
- Driving record, including at-fault accidents, tickets and claims history
- Years of driving experience
- Age, where state rules allow it to be used
- How much you drive each year, and whether the car is used for commuting or business
- Whether there has been a gap in continuous coverage
Factors about the vehicle
- Make, model and year
- Repair and parts costs for that vehicle
- Safety features and anti-theft equipment
- Theft and claim rates for that model
Factors about the policy itself
- The liability limits you choose: higher limits cost more
- Your deductibles on collision and comprehensive
- Optional cover such as uninsured motorist, rental reimbursement or roadside assistance
Where you live
Rates are filed state by state and often differ by ZIP code. Traffic density, repair costs, weather risk, theft rates and the state's own insurance rules all feed into local pricing. This is why a move can change your premium even with no change in your driving.
Factors that vary by state
Some rating factors are restricted or banned in certain states, including the use of credit-based insurance scores, gender and marital status. Which factors your insurer may use depends on where you live, so ask the agent what applies to your state.
Discounts worth asking about
- Bundling home or renters with auto
- Safe driver and defensive driving course discounts
- Low mileage or usage-based programs
- Multi-car, paid-in-full and paperless billing discounts
- Discounts for students, retirees or certain affiliations
Questions to ask your agent
- Which rating factors affect my quote the most?
- Would a higher deductible meaningfully lower my premium?
- Which discounts am I not getting, and how would I qualify?
- How long does an accident or ticket affect my rate in this state?
Shop the same cover
When comparing companies, ask every one for the same limits, the same deductibles and the same optional cover. Otherwise you are comparing a cheaper price against a smaller policy.
Questions
Why did my premium rise without any claims?
Insurers refile rates over time based on costs in your area. Ask your agent what changed and recheck the market.
Does one speeding ticket change my rate a lot?
It depends on the insurer, the violation and your state. Ask before assuming.
Is a usage-based program worth it?
It can help low-mileage and careful drivers, but terms differ. Ask what data is collected and whether the rate can go up.
General information only, not financial, legal or insurance advice. Rules, prices and benefits vary by state and by policy. A licensed professional can explain what applies to you.