In most states, your credit history is one of the heaviest factors in your car insurance price — often second only to your driving record. A driver with poor credit can pay roughly double what an identical driver with excellent credit pays for the same coverage. Here’s how credit-based insurance scores work, where the practice is banned, and what you can actually do about it.
- A credit-based insurance score is not your FICO score — it’s a separate, proprietary score built from credit-report data to predict insurance claims.
- Nationally, drivers with poor credit pay on average about 190% more than drivers with excellent credit for the same coverage (Quadrant data, June 2025).
- California, Hawaii, Massachusetts, Maryland, and Michigan ban or bar credit use in auto insurance rates; several other states restrict how it can be used.
- You can ask your insurer to re-run your credit after it improves — most won’t do it automatically.
- Shopping for insurance quotes uses soft inquiries and never hurts your credit.
What a credit-based insurance score is
Your credit-based insurance score is not your FICO score, though both are built from information in your credit report. As the Wall Street Journal’s consumer-finance team explains, insurers use models — from providers like FICO or LexisNexis, or proprietary in-house models — that weight credit factors differently than a lending score does. The inputs include:
- Payment history — how consistently you’ve met debt obligations
- Outstanding debt — total balances owed
- Credit history length — age of accounts
- New credit — recent applications for credit
- Credit mix — types of accounts (mortgage, auto loan, cards, student loans)
The critical difference from a lending score: a credit-based insurance score predicts the likelihood you’ll file an insurance claim, not whether you’ll repay a loan. The two can diverge. The Journal notes the telling edge cases: a consumer with a thin file might have a decent FICO from on-time payments on one card, but a poor insurance score from lack of history — “a statistical unknown and, therefore, a higher risk for claims.” Conversely, someone with high utilization but a decade of on-time payments might have a mediocre FICO and a strong insurance score.
You generally can’t see your exact score — the models are proprietary and use different scales. But if an insurer charges you more because of it, federal law requires an adverse action notice telling you which credit factors influenced the decision. That notice is, as one credit counselor quoted by the Journal puts it, “a free roadmap” for what to fix.
How much it can cost you
The numbers are stark. According to a Wall Street Journal analysis of Quadrant Information Services rate data (current as of June 2025, for a 35-year-old driver with 50/100/50 liability plus collision and comprehensive with a $500 deductible):
- National average: $147/month with excellent credit vs. $426/month with poor credit — a 190% increase, or about $3,350 more per year.
- The spread varies wildly by carrier: from 79% at some insurers to over 500% at others in the Journal’s 10-company analysis.
The Insurance Information Institute cites industry research with the same message from the other direction: a 2017 report from the Arkansas insurance department covering 3.4 million policies found credit information lowered premiums for 57.4% of auto policies and raised them for 23.4% — meaning good credit is actively rewarded, not just that bad credit is punished. The III also notes that drivers with the worst insurance scores file collision claims at roughly twice the rate of drivers with the best scores.
The honest summary: in states where it’s allowed, your credit-based insurance score is typically one of the two or three biggest rating factors on your policy — alongside driving record, and often ahead of vehicle choice or mileage. See what affects car insurance rates for how it interacts with the other factors.
Why insurers use it
Insurers’ argument is actuarial, not moral: statistical studies link credit behavior to claim likelihood. The III points to actuarial research suggesting that “how a person manages their financial affairs can be a good predictor of their likelihood to file insurance claims,” and notes the Federal Trade Commission’s 2007 study concluded credit scores are effective predictors of risk under auto policies. The industry’s stated goal is matching premium to risk so lower-risk customers don’t subsidize higher-risk ones.
Critics’ argument is about fairness: credit history reflects circumstances — medical debt, job loss, divorce, thin files for young or immigrant consumers — as much as character, and penalizing it can compound disadvantage. Consumer advocates have pushed bans for decades with mixed success. Both things can be true at once: the correlation exists in the data, and the practice still hits financially stressed households hardest. Our job here is to describe the system accurately so you can navigate it — not to settle the policy debate.
States that ban or restrict it
Credit-based insurance scoring is regulated state by state, and the map changes. Based on the Wall Street Journal’s state table (current as of March 2026), these states prohibit or bar the use of credit information in auto insurance rates:
| State | Status |
|---|---|
| California | Prohibited for auto (and home) |
| Hawaii | Prohibited for auto |
| Massachusetts | Prohibited for auto (and home) |
| Maryland | Prohibited for auto |
| Michigan | Barred under state law (with legal nuance around “credit-based insurance scores” specifically, as of March 2026) |
Beyond outright bans, several states restrict how credit can be used even where it’s allowed:
- New York and Illinois bar insurers from denying, canceling, or non-renewing coverage based solely on credit information.
- Other states limit credit use to initial underwriting but not renewal pricing, or restrict its use in tier placement.
Two cautions. First, this landscape shifts — legislatures revisit these rules regularly, and the Journal explicitly notes “these laws also change over time.” Second, if you live in a ban state, your rate is set without credit entirely — which means the other rating factors (driving record, vehicle, location, mileage) carry more weight. Verify your state’s current rules on your state insurance department’s website before assuming anything.
How to mitigate the impact
If you live where credit-based scoring is allowed, here’s what actually moves the needle:
1. Improve the underlying credit behaviors. The Journal’s cited experts recommend the standard playbook, which feeds insurance scores too: pay bills on time (payment history is typically the heaviest factor), keep credit utilization low — ideally under 30% of available credit — and avoid bursts of new applications. Paying down a high card balance can produce a visible score bump within 30 to 60 days as utilization updates.
2. Ask your insurer to re-run your credit. This is the most overlooked move in the article. Insurers generally do not automatically recheck your credit at each renewal — so a score that improved two years ago may still be pricing you as a worse risk than you are. Call and ask for a re-run; state rules vary on how often they must comply, but asking costs nothing.
3. Shop aggressively. Remember the carrier spread: 79% to 500%+ in the Journal’s data. Insurers weight credit very differently, so the penalty for poor credit at one carrier can be a fraction of the penalty at another. This is the single highest-ROI action for drivers with poor credit. Use our quote comparison checklist and get at least three quotes.
4. Lean on the factors you control. Clean driving record, higher deductibles (the III notes $200→$500 can save 15–30% on collision/comprehensive), accurate low mileage, and every discount you qualify for — these offset a credit penalty at the margins. Our lower-your-premium guide stacks them systematically.
5. Read your adverse action notice. If you get one, it names the specific credit factors that raised your rate. That’s your prioritized to-fix list — more useful than generic credit advice.
6. Consider usage-based insurance. Telematics programs price from measured driving rather than proxies. If your credit is weak but your driving is genuinely safe, a usage-based program can partially route around the credit penalty — with the privacy trade-offs described in that guide.
Credit and insurance FAQ
Will shopping for car insurance hurt my credit score?
No. Insurance quote inquiries are soft inquiries — they don’t affect your credit at all. Shop as widely as you like; the Journal’s guide states this explicitly.
Is my credit-based insurance score the same everywhere?
No. Models are proprietary and vary by insurer and score provider. You might be priced as a better risk at one carrier and a worse risk at another with the same credit report — another reason to shop.
Can an insurer cancel my policy because of my credit?
In most states, not solely for that — and New York and Illinois explicitly ban denial, cancellation, or nonrenewal based solely on credit. But credit can still affect your price at renewal where allowed.
Does paying my insurance bill late hurt my credit-based insurance score?
Possibly, indirectly. Late payments reported to credit bureaus feed the payment-history factor. Autopay isn’t just a discount play — it protects the factor too.
I live in a ban state. Does credit affect me at all?
For auto insurance rates in California, Hawaii, Massachusetts, Maryland, and Michigan — no, per current law. (Home insurance rules differ by state.) If you move to a state where it’s allowed, expect it to become a factor at your next policy.
How fast can improving my credit lower my premium?
The score can move within one to two billing cycles of major utilization improvements — but your premium only changes when the insurer re-runs the score, which usually means asking. Time the request for 30–60 days after the improvement posts, and ideally before renewal.
Credit-based insurance scoring is one of the least understood and most consequential parts of auto pricing: a ~190% average national price gap between excellent and poor credit, per June 2025 Quadrant data analyzed by the Wall Street Journal, with wide variation by carrier. Know your state’s rules, ask for a re-run after improvements, and shop carriers that weight credit lightly. Primary sources: WSJ Buyside on credit-based insurance scores and the III’s background on insurance scoring.
This is general information, not financial advice — check your state’s insurance department for rules that apply to you.