What a credit-based insurance score actually is
A credit-based insurance score is a separate score calculated from your credit report — most often by LexisNexis or TransUnion — that predicts how likely you are to file an insurance claim. It's not the same as your FICO score. The credit-based insurance score uses similar inputs (payment history, credit utilization, length of credit history, types of credit, recent credit inquiries) but weights them differently because insurers care about claim probability, not loan-default probability.
Decades of insurer-funded actuarial studies — and several independent ones, including a Federal Trade Commission report — show a statistically significant correlation between credit-based insurance scores and the frequency and severity of auto-insurance claims. Whether this correlation is causal or proxies for other factors (income, neighborhood) is hotly debated, which is why six states have either banned the practice outright or sharply restricted it.
How much your credit actually changes your rate
The impact is enormous. The Consumer Federation of America's 2024 analysis found that drivers with poor credit pay an average of 71% more for the same coverage as drivers with excellent credit, holding all other rating factors constant. In dollar terms, that's a $1,400 to $2,200 annual difference for the same policy in most states. In some states (Michigan, Louisiana, Massachusetts before its ban), the gap reached $2,500+.
The score tiers carriers use are typically: Excellent (820+), Good (740–819), Fair (660–739), Poor (580–659), and Very Poor (under 580). Moving up a single tier — say from Fair to Good — typically saves $300–$650/year. Moving from Very Poor to Excellent can save $1,400–$2,200/year.
States that ban or limit credit-based scoring
Six states have laws restricting or banning the use of credit-based insurance scores in auto insurance pricing:
- California — banned by Proposition 103 (1988); rates can only use driving record, annual mileage, and years of driving experience
- Hawaii — banned entirely for auto insurance
- Massachusetts — banned entirely for auto insurance
- Michigan — banned as of 2019 reforms; cannot be used as a rating factor
- Oregon — banned for renewals; allowed only on new business (very limited use)
- Washington — three-year ban enacted 2021, ongoing legislative battles over permanence
How to improve your credit-based insurance score fast
Because credit-based insurance scores re-weight the same inputs as your FICO, the levers are familiar — but the timing and priority differ. The single highest-impact change you can make in a 60–90 day window is reducing credit-card utilization below 30% of your limit. This single change typically improves credit-based insurance scores by 30–60 points and can drop your auto premium 5–15% at next renewal.
Other proven tactics: pay down any account in collections (or negotiate a 'pay for delete'); avoid opening new credit accounts in the 6 months before your renewal (hard inquiries cost 5–10 points); leave old accounts open to preserve account-age history; and check your credit report at annualcreditreport.com for errors — disputing and removing even one incorrect derogatory mark can shift your score 40+ points.
How to get cheaper rates if your credit is poor right now
If your credit is poor and you need cheaper auto insurance today, you have several paths. First, shop carriers that weight credit less heavily — USAA (where eligible), Erie, and most state Farm Bureau mutuals tend to weight driving record more and credit less. Progressive's Snapshot telematics can also override credit-based pricing if you drive well during the 90-day monitoring window. Second, ask specifically about non-credit-based discounts: pay-in-full, paperless, autopay, low-mileage, and defensive-driving course discounts are all independent of credit.
Third, if you live in a state that allows it, ask your carrier about 'extraordinary life circumstances' provisions — most states require carriers to disregard credit dings caused by medical bills, divorce, identity theft, or active-duty military deployment. Federal law (FCRA) also lets you request a reason code for any credit-based adverse action, which can sometimes reveal disputable errors.