How Much Can Poor Credit Affect Your Auto Insurance Cost?
It can come as a surprise that a credit report, of all things, might influence how much a driver pays for coverage, but in many states it’s treated as a meaningful piece of the pricing picture.
The short answer
In states that permit it, insurers can use a credit-based insurance score — a version of credit data tailored to predict insurance claims rather than loan repayment — as one factor in setting premiums. A lower score can raise the cost of coverage, sometimes substantially, but the size of that effect varies widely by insurer, by state, and by how the rest of a driver’s profile looks. It’s one of several factors that affect an auto insurance premium, not the only one.
Why insurers look at credit at all
Insurers have found, in aggregate data across large pools of policyholders, that credit-based scores correlate statistically with the likelihood of filing a claim, even though the two seem unrelated on the surface. That correlation is why some regulators allow its use as a pricing factor, while others restrict or ban it outright, treating it as an unfair proxy for other characteristics. Where it’s allowed, it typically works alongside a driving record rather than replacing it — a clean driving history still matters even if a credit score is weak, and vice versa.
How much the effect can vary
There’s no single, stable percentage that describes how much poor credit raises a premium, because insurers weight the factor differently, and some rely on it much more heavily than others in their pricing models. The effect can also compound with location: someone with a lower credit-based score in a state that leans heavily on it may see a bigger swing than the same person would in a state that gives it less weight. This is part of why shopping around across insurers can produce noticeably different quotes for the same driver — each company’s formula treats the same credit history differently.
What’s actually being measured
A credit-based insurance score isn’t identical to a standard credit score used for loans or credit-card applications; it draws on some of the same underlying data — payment history, amounts owed, length of credit history — but weights it differently to predict insurance claims specifically. That means someone can have a strong general credit score and a weaker insurance score, or the reverse, depending on which details the two scoring models emphasize. Reviewing a credit report for errors is one of the few concrete steps available, since inaccurate information can affect both types of scores.
Steps that may help over time
Because the underlying data overlaps with general credit health, habits that tend to improve a standard credit score over time — paying on time, reducing balances relative to limits, keeping older accounts open — can also gradually improve a credit-based insurance score, though the timeline and effect size vary and aren’t assured for any individual. Some insurers also periodically re-score policyholders at renewal, so a credit profile that strengthens over time can eventually be reflected in future premiums, even without switching companies.
What to weigh
Because insurers vary so much in how heavily they weight credit, it’s often worth comparing quotes across a few companies rather than assuming one insurer’s price reflects the norm. For anyone in a state where this factor applies, understanding that it’s one input among several — alongside driving record, coverage levels, and location — can make an unexpectedly high or low quote easier to make sense of.