Most insurers — and we're not just talking about auto insurance companies here — use some type of credit-based insurance score to help determine how risky a potential customer is. The practice is a bit controversial, which is why some states have laws against using it (see above). But the general thinking behind insurer credit checks is: If someone is bad with their finances, they might be irresponsible in other areas of life, too. You can learn more about how car insurance rates are determined here.
NerdWallet averaged rates for 30-year-old men and women for 10 ZIP codes in each state and Washington, D.C., from the largest insurers in each state. “Good drivers” had no moving violations on record and credit in the “good” tier as reported to each insurer. For the other two driver profiles, we changed the credit tier to “poor” or added one at-fault accident, keeping everything else the same. Sample drivers had the following coverage limits:
A higher deductible means lower premiums, your monthly or annual price. But if you get in an accident, you will have to pay more than if your deductibles were lower. For example, if you have a $500 deductible on a $2,000 accident, you’d pay $500 before your insurance company covers the other $1,500. With a $1,000 deductible, you’re paying $1,000 and your insurer covers the remaining $1,000.

Below is a table with the three companies with the lowest auto insurance rates for ten of the biggest cities in the state. This will help motorists see a local view of who has the cheapest rates in their hometown. However, these rates are for our single male sample driver, so it is important to remember that your rates will differ based on your vehicle, driving record, and other factors. Auto-Owners, Allied, and North Carolina Farm Bureau dominated as the top three cheapest car insurance companies across the 112 cities we surveyed.
Most insurers — and we're not just talking about auto insurance companies here — use some type of credit-based insurance score to help determine how risky a potential customer is. The practice is a bit controversial, which is why some states have laws against using it (see above). But the general thinking behind insurer credit checks is: If someone is bad with their finances, they might be irresponsible in other areas of life, too. You can learn more about how car insurance rates are determined here.
First, you can play with your deductible. We all like to have the least amount of out of pocket expense if we are involved in an accident. However, the lower the deductible, the higher your premium will be. Select a higher deductible amount. If you have chosen a $500 deductible, rerun your quote with a $1,000 or higher deductible. This will assuredly lower your overall premium. 
We identified the auto insurance companies with the cheapest rates, but, as with anything, you want to be sure you are getting high quality service from your insurance company. Reliable car insurance companies are critical in ensuring a smooth customer-insurer relationship. There are a few factors we deemed most important to evaluate a company on which affect policy holders' satisfaction, such as, the average shopping experience, customer service, ability to resolve complaints, and quote filing process.
Example (Comprehensive): You park your car outside during a major hailstorm, and it's totaled. If you have comprehensive, we'll pay out for the full value of your car (minus your deductible amount). Example (Collision): You back out of your garage, hit your basketball hoop, and cause $2,000 worth of damage to your vehicle. If you have collision, we'll then pay for your repairs (minus your deductible amount).
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