Does Credit Score Affect Car Insurance? Yes, in Most States
In 46 states, your credit history is one of the biggest factors in what you pay for car insurance, often ranking right behind your driving record in how heavily it influences the price. Two drivers with the same age, same zip code, same car, same clean driving record, and the same coverage limits can end up with meaningfully different premiums from the same insurer, purely because of the difference in their credit.
Four states ban the practice entirely: California, Hawaii, Massachusetts, and Michigan. In every other state, insurers are legally allowed to use it, and the large majority do.
What Is a Credit-Based Insurance Score?
It is not the same number that shows up when you check your credit for a mortgage or a credit card. Insurers use a separate calculation called a credit-based insurance score[1], built from the same underlying credit report data as a standard score but weighted for a different purpose: predicting the likelihood and cost of a future insurance claim, rather than the likelihood of repaying a loan.
The weighting commonly used across the industry breaks down roughly as follows: payment history around 40 percent, outstanding debt around 30 percent, length of credit history around 15 percent, pursuit of new credit around 10 percent, and credit mix making up the remainder. That's a similar structure to a standard FICO score, just recalibrated around claims risk instead of default risk.
Checking a quote does not lower your actual credit score. Insurers pull this data through a soft inquiry[3], the same category of check that doesn't move your score the way a new credit card application would.
Why Do Insurers Use Credit At All?
The justification is a statistical one. Large-scale research, including a study the Federal Trade Commission conducted specifically on this question[2], has found a real, measurable correlation between lower credit-based scores and both a higher likelihood of filing a claim and higher average claim costs when a claim occurs.
Whether that's a fair basis for pricing is a separate, genuinely contested question from whether the correlation is statistically real. Credit can drop for reasons that have nothing to do with driving risk: a medical emergency, a layoff, a divorce. The insurer's model doesn't distinguish between those causes and a driver who simply doesn't pay bills on time. That tension has produced real legislative activity, with several states introducing bills in recent sessions to restrict or eliminate the practice, though most such bills historically have not advanced past committee.
How Much Can It Actually Raise Your Premium?
Independent studies differ meaningfully on the exact size of the gap, and any specific number should be read as an estimate rather than a fixed rule. Recent analyses put the difference between good and poor credit tiers anywhere from roughly 70 percent to well over 100 percent for otherwise identical drivers, and some studies isolating the very best and very worst credit tiers find gaps above 200 percent.
What's consistent across the research is the direction and the scale: this is a large pricing factor, not a marginal one, and in many cases the size of the credit effect exceeds what a single at-fault accident or moving violation would do to the same driver's rate. It also varies significantly by insurer. Some major carriers weight credit heavily in their pricing model; others weight it much more lightly for an identical driver profile, which means the same person can receive very different quotes purely based on which company's model they land in.
To put a rough number on it: for two otherwise identical drivers, same car, same zip code, same clean driving record, the difference between excellent credit and poor credit could plausibly separate an annual premium of around $1,700 from one closer to $4,000 or more for the same coverage, depending on the state and the insurer. Neither figure is unusual. That's roughly the range you see across the industry once credit enters the pricing model, and it's a larger swing than most drivers expect from a factor unrelated to how they actually drive.
Which States Ban the Use of Credit in Auto Insurance Pricing?
California, Hawaii, and Massachusetts prohibit the use of credit-based insurance scores in auto insurance pricing outright. Michigan restricts it so heavily, barring insurers from using it to set rates, deny coverage, cancel a policy, or refuse a renewal, that it functions as a full ban in practice.
A handful of additional states impose partial restrictions rather than a complete ban. Maryland, Oregon, and Utah each limit specific uses, such as barring credit from being used to cancel or deny a renewal while still allowing it to influence the initial rate. Several other states, including Nevada, North Carolina, and Pennsylvania, restrict narrower aspects of the practice.
This is an area of active legislative attention, with several additional states considering restrictions in recent sessions. Confirm your own state's current rules directly with your insurer or state insurance department rather than relying on a static list, since this is exactly the kind of regulation that changes.
Does Having No Credit History Count Against You?
Often, yes. Having no credit history at all is commonly treated similarly to having poor credit, rather than as a neutral starting point. From the insurer's perspective, no credit history means no data to evaluate, and the pricing model typically defaults toward treating that gap cautiously rather than favorably.
This affects younger drivers and recent immigrants disproportionately, since neither group has had time to build a credit file regardless of how responsibly they manage money. The practical fix is the same as improving poor credit: build a track record over time, and in the meantime, compare quotes across multiple insurers, since carriers vary in how harshly they treat a thin or nonexistent credit file.
Is the Rate Locked In, or Does It Change Over Time?
It changes. Most insurers re-check credit periodically, commonly at each policy renewal, whether that's every six or twelve months depending on the carrier. This works in both directions: if your credit worsens, your rate can increase at renewal even with an unchanged driving record, and if your credit improves, that improvement typically gets reflected in your premium over time without any action needed beyond managing your credit generally.
Some carriers will also re-rate a policy mid-term if a customer specifically requests it after a meaningful credit improvement, rather than requiring them to wait for the next scheduled renewal. This isn't universal, so it's worth asking your insurer directly rather than assuming you have to wait.
On timeline, expect gradual movement rather than a dramatic shift at the next bill. A credit-based insurance score tracks meaningful movement in the underlying credit report, which typically plays out over months, not days. A single on-time payment doesn't erase a pattern of missed ones, and a paid-down balance doesn't immediately offset a long stretch of high utilization.
How to Actually Improve the Number
Because a credit-based insurance score draws from largely the same information as a standard credit score, the actions that improve one tend to improve the other, even though the two numbers aren't identical.
Paying every bill on time is the single heaviest-weighted factor in most models, so consistent payment history matters more here than almost anything else. Keeping credit card balances low relative to available credit, commonly called credit utilization, is the next most significant lever. Limiting new credit applications in a short window also helps, since a sudden burst of inquiries can signal financial stress to both a standard credit model and an insurance-specific one.
None of this is insurance-specific advice. It's the same guidance that improves a regular credit score. The difference is simply that most drivers don't realize their auto insurance bill is quietly riding along with that number, in addition to loan rates and credit card offers.
What to Do If You're in a Credit-Heavy State With Poor Credit Right Now
The most immediately actionable step isn't waiting for your credit to improve. It's shopping the policy specifically with this factor in mind. Because carriers weight credit so differently from one another, a driver with a rough credit history might find one insurer prices them dramatically higher than another insurer would for identical coverage, the same car, and the same driving record. That difference is only visible by actually comparing quotes across more than one company.
A small number of insurers, often regional or specialty carriers, either don't use credit at all or weight it far more lightly than the large national carriers do. Availability varies significantly by state, and they're not the right fit for every driver, but they're worth including in a comparison specifically if credit is actively working against you elsewhere.
What Counts as "Good" or "Poor" Credit for This Purpose?
Each insurer defines its own tiers for a credit-based insurance score, so a score considered average at one company might be treated as below average at another. As a general reference point, standard credit score ranges are commonly divided as follows: 300 to 579 is considered poor, 580 to 669 fair, 670 to 739 good, 740 to 799 very good, and 800 to 850 exceptional. Your credit-based insurance score isn't identical to this scale, but it tends to move in the same direction, so a driver with a standard score in the poor or fair range should expect to fall into a higher-cost insurance tier as well, absent other factors pulling the pricing in a different direction.
Frequently Asked Questions
Generally, no. Insurers typically don't report on-time payments to the credit bureaus, so routine payment doesn't build your credit. However, if an unpaid insurance bill is sent to collections, that collections account can hurt your credit score, even though the payments themselves wouldn't have helped it.
Only if you live in a state that restricts or bans the practice. Where it's legally allowed, insurers generally aren't required to offer an opt-out, since it's built into their approved rating model.
No. Insurance quotes use a soft inquiry, which doesn't affect your credit score regardless of how many insurers you get quotes from.
No. It's a statistical correlation across large populations, not an individual judgment. It says nothing about your specific driving skill or history, only about a broader pattern insurers have found between credit behavior and claims across many customers.
Since insurers commonly re-check credit at renewal, it's worth reviewing your credit reports a month or two before you shop, which gives you time to correct any errors that could be inflating your rate. You can get your reports free from each major bureau, and disputing an inaccuracy can help both your credit score and your insurance score.
No. Each insurer uses its own model and its own tier cutoffs, so the same credit profile can land in different pricing tiers at different companies. That's a big part of why comparing quotes matters, especially if your credit is actively working against you at one carrier.
The Bottom Line
Credit is one of the largest, least visible factors in most auto insurance pricing models, and it's a mistake to assume a single quote reflects what every insurer would charge. Because the weighting differs so much carrier to carrier, the fix for a bad number usually isn't complicated: confirm whether your state even allows the practice, check your credit-based score's trajectory at renewal, and compare quotes across several insurers rather than accepting the first one as the market rate.
Key takeaways
- ✓In 46 states, credit-based insurance scores are a legal, commonly used rating factor, often ranking just behind driving record in how much they influence your premium.
- ✓A credit-based insurance score is separate from your standard credit score. It uses the same underlying data but is weighted to predict claim likelihood rather than loan repayment risk.
- ✓Getting an insurance quote only triggers a soft credit inquiry, which does not affect your actual credit score.
- ✓California, Hawaii, and Massachusetts ban the use of credit in auto insurance pricing outright, and Michigan restricts it so heavily it functions as a ban in practice. Maryland, Oregon, and Utah impose partial restrictions.
- ✓Studies disagree on the exact size of the effect, with estimates ranging from roughly 70 percent to over 200 percent between good and poor credit tiers, but all agree it is a large factor, often larger than a single accident or violation.
- ✓Having no credit history at all is often treated similarly to poor credit, not as a neutral starting point.
- ✓Insurers commonly re-check credit at renewal, so the effect isn't permanent. Paying bills on time and keeping credit utilization low are the biggest levers for improving it over time.
- ✓Because carriers weight credit so differently from each other, comparing quotes across multiple insurers matters more for this factor than for almost any other.