How Credit Score Impacts Car Insurance Rates and What You Can Do About It

Reviewed by the Smart Insurance 101 Editorial Team

Credit score car insurance pricing is one of the most misunderstood cost drivers in personal finance. According to NAIC industry data, roughly 95% of auto insurers use credit-based insurance scores in states where the practice is permitted, yet most policyholders have no idea their credit history is pulling double duty at renewal time.

This article is for drivers who suspect their credit is quietly inflating their premiums and want a clear-eyed plan to do something about it. The approach works best for people who have time to let credit improvements show up before the next policy renewal cycle, typically six to twelve months out.

Does Your Credit Score Actually Affect Car Insurance Rates?

Yes, and the mechanism is more specific than most people expect. Insurers don’t use your standard FICO score. They use a credit-based insurance score (CBIS), a separate model built to predict the likelihood you’ll file a claim, not the likelihood you’ll repay a loan. The inputs overlap with your FICO score, payment history, credit utilization, length of credit history, new credit inquiries, but the weighting is different, and so is the output.

CBIS vs. Your Regular Credit Score

Here’s the thing: your FICO score and your credit-based insurance score can move in different directions at the same time. A consumer who opens several new credit accounts might see their FICO score dip only slightly, but their insurance score could fall more sharply because new credit inquiries carry heavier weight in some CBIS models. The NAIC explains that credit-based insurance scores are not the same as regular credit scores and that consumers should contact their insurer or state regulator if they want to understand exactly which model is being used.

The statistical rationale insurers rely on is this: industry research consistently shows that drivers with lower credit scores file more claims and generate higher claim costs than drivers with higher scores, controlling for other variables like age and driving record. Whether that correlation is causal is a separate debate. But from an underwriting standpoint, it’s treated as a legitimate pricing factor in most of the country.

How Much More Will Poor Credit Cost You on Car Insurance?

The dollar impact is significant enough to treat credit improvement as a genuine financial priority. Drivers with poor credit pay 69% more on average than drivers with good credit, per NerdWallet’s rate data. Zebra’s research puts the national averages at roughly $6,254 per year for drivers with very poor credit versus $1,673 for drivers with exceptional credit, identical driving records, just different credit tiers.

A Worked Dollar Example

Take a driver paying $3,200 per year under a poor-credit rating. If improving their credit from poor to good reduces their rate by the average 69%, the math works out to a savings of roughly $1,341 per year ($3,200 × 0.419 = ~$1,341 reduction, bringing the annual premium down to approximately $1,859). That’s about $112 per month back in their pocket, from a credit improvement alone, before any change in coverage or deductible.

That gap also explains why the same driver can get dramatically different quotes from different insurers. Not all CBIS models weight the same factors identically. One insurer might penalize high utilization heavily; another might weight payment history more. That variability is exactly why comparing car insurance quotes across multiple carriers remains one of the highest-leverage moves a driver in a credit-penalty situation can make.

States That Ban or Restrict Credit Scoring for Auto Insurance

Three states, California, Hawaii, and Massachusetts, prohibit insurers from using credit-based insurance scores in auto underwriting entirely. If you live in one of those states, your driving record, vehicle type, and annual mileage carry all the weight. Credit is off the table.

A few other states impose partial restrictions or special protections. The Texas Department of Insurance notes that while Texas allows credit scoring, insurers cannot use certain items against consumers, including medical debt in collections, information disputed by the consumer, or credit problems that resulted directly from a documented extraordinary life event like a serious illness or job loss. Similar protections exist in other states. If your credit took a hit during a major life disruption, it’s worth contacting your insurer and asking whether an exception applies, or filing a complaint with your state’s insurance regulator.

How to Lower Your Car Insurance Bill by Improving Your Credit

Start with the two factors that move a credit-based insurance score fastest: payment history and credit utilization. Payment history typically carries the most weight, so a single on-time payment won’t rescue a score, but six to twelve months of consistent on-time payments will show measurable improvement in most models. Utilization, the percentage of available revolving credit you’re using, responds more quickly. Paying a card balance down from 60% to below 20% utilization can produce a visible score change within one to two billing cycles.

Timing Your Improvement to the Renewal Cycle

Insurers typically recheck credit at the annual or semi-annual renewal, not continuously. That means a score improvement made today may not reduce your premium until the next renewal, but it will show up if the score has moved. Here’s the thing: waiting for renewal isn’t passive. Use that window to also pull competing quotes. Lowering your auto insurance costs through a combination of credit improvement and competitive quoting compounds the benefit. One insurer might re-rate you favorably at renewal; another might already price poor-credit drivers more aggressively than the market average, and switching could save just as much.

What Else Moves the Needle

Improving credit is the highest-leverage fix, but it’s not the only one. Usage-based insurance programs, telematics products offered by carriers like Progressive (Snapshot), Allstate (Drivewise), and State Farm (Drive Safe & Save), score your actual driving behavior and can reduce premiums independent of credit. For a driver with poor credit but genuinely safe driving habits, enrolling in telematics can partially offset the credit penalty while the underlying score improves. Bundling your auto policy with renters or homeowners coverage is another consistent discount: most major carriers offer 5–25% off for bundled policies. You can read more about how bundling factors into overall insurance strategy in our complete car insurance guide.

Also worth doing: raise your deductible if your emergency fund can absorb the higher out-of-pocket cost. Moving from a $500 to a $1,000 deductible typically reduces comprehensive and collision premiums by 10–15% depending on the carrier, which provides immediate relief while credit catches up.

Where This Recommendation Falls Short

The advice to “improve your credit to lower your insurance” is sound, and it’s genuinely the right call for most drivers in most states. But there are real conditions under which it falls short, and being clear about them matters.

The biggest drawback is time. Credit improvement is a slow process when you’re starting from a poor score. If you missed multiple payments, have accounts in collections, or recently experienced bankruptcy, you’re not looking at a six-month fix. Negative items like collections can stay on your credit report for up to seven years, and while their impact diminishes over time, they don’t disappear at renewal. In that scenario, the faster win is shopping competing insurers aggressively right now, not waiting for a score that may not materially improve before your next renewal.

The catch for drivers in certain states: even in states that allow credit scoring, some insurers weigh it more heavily than others. A driver with poor credit might find one carrier charges them 80% above the good-credit rate while another charges only 30% above. The gap between the most and least penalizing insurer in your ZIP code can exceed the gap between a good-credit and poor-credit rate at any single carrier. That makes cross-carrier comparison more impactful than credit improvement in the near term.

There’s also the tradeoff between fixing credit and fixing other rating factors. A single at-fault accident or a DUI conviction typically carries a larger rate penalty than poor credit at most insurers, and those violations follow a driver for three to five years regardless of credit score. If your record has recent violations, improving credit will help at the margins but won’t offset the surcharge from a major incident. In that case, the priority should be maintaining a clean record going forward and exploring whether a defensive driving course can accelerate the violation’s fade from your rating history.

Finally, this recommendation is not for everyone in the same way. Drivers already carrying excellent credit have little room to gain from further credit improvement. The leverage is concentrated at the poor-to-fair and fair-to-good transitions, not at the top of the scale. And if you live in California, Hawaii, or Massachusetts, the entire credit-improvement-for-insurance strategy is irrelevant to your auto premium.

Frequently Asked Questions

Does checking my own credit score affect my car insurance rate?

No. A self-initiated credit check, called a soft inquiry, does not affect your credit-based insurance score or your premium. Only hard inquiries from new credit applications can move your score, and even those have a limited, short-term impact on CBIS models compared to payment history and utilization.

How often do insurers check your credit for auto insurance?

Most major insurers recheck credit at each policy renewal, typically every six or twelve months. Some carriers check only at the initial quote and at renewal; others review continuously and apply changes at the next renewal cycle. If your score has improved significantly since your last renewal, ask your insurer or your broker whether a mid-term re-rating is available, some carriers allow it, most don’t.

Can an insurer cancel my policy because of my credit score?

In most states, a poor credit score alone is not legal grounds for canceling an existing policy. Insurers can use credit to set or adjust your rate at renewal, but mid-term cancellation based on credit is generally restricted. State rules vary, so check your state’s insurance department website if you receive an unexpected cancellation notice citing financial information.

What’s the difference between a credit score and a credit-based insurance score?

A standard credit score, like a FICO score, predicts the probability you’ll repay debt. A credit-based insurance score uses similar inputs but is weighted to predict the likelihood you’ll file a claim. They often correlate, but they can diverge: a pattern of behavior that lenders treat as low-risk may still produce a lower insurance score if it resembles patterns associated with higher claim frequency in insurance data.

If I move to California, will my credit score stop affecting my car insurance?

Yes. California, Hawaii, and Massachusetts prohibit the use of credit-based insurance scores for auto insurance pricing. Moving to any of those states means your insurer must price your policy based solely on driving record, vehicle type, mileage, and similar factors. Drivers with poor credit sometimes find their effective rates lower in those states than in states that allow credit scoring, though other local factors like traffic density and repair costs also affect premiums. For a broader look at how insurers factor different variables into your premium, see our explainer on car insurance quote factors.

Will paying off a car loan help my insurance score?

It can, indirectly. Paying off an installment loan like a car loan typically improves your credit mix and lowers your total debt, which can lift both your FICO score and your credit-based insurance score over time. The effect is usually smaller than reducing revolving credit utilization, but it contributes to the overall score trajectory that eventually works in your favor at renewal. If you’re also thinking about the broader picture of what drives your insurance costs, our analysis of why insurance premiums are rising provides useful context.