This is a good question but different insurance companies use their own rating systems to classify the risks they insure. I know of one company that uses 88 different classification codes for auto insurance. Certain I can give you a few which are: age, sex, marital status, moving violations (3yrs.), zip code where you reside, type of education, type of job, number of years licensed, prior claims (3yrs.), insurance credit score, years in residence, own or rent, and many many more. Not all companies use all these factors and other companies use more than these.
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