How Credit Scores Factor Into Insurance Underwriting

Why Insurers Care About Your Credit History

Most people expect their driving record to drive their car insurance rate. Fewer expect their credit card balance to play a role. But in most of the country, it does — and understanding why is the first step to managing it.

The logic insurers use is actuarial, not moral. Starting in the 1990s, insurers began running large datasets to find correlations between consumer behavior and claim frequency. The finding that emerged — and has since been replicated across multiple independent studies — is that people with lower credit-based insurance scores file claims more often and generate higher claim costs on average than people with higher scores.

Insurers aren't accusing anyone with a low credit score of being reckless. They're applying a statistical model. That distinction matters, but it doesn't make the practice less controversial — or less consequential for your wallet.

The practical result is straightforward: if you live in a state that permits credit scoring (which is most of them), your credit history is influencing the premium quote you receive. It may be one of several factors, or it may carry significant weight depending on the insurer's model. To see the full picture of what drives your rate, see what actually goes into your auto insurance premium.

Credit-Based Insurance Score vs. Your Credit Score: Key Differences

This distinction is more important than most consumers realize. When an insurer says they're checking your credit, they're not pulling the same score your mortgage lender sees.

A standard credit score — FICO or VantageScore — is designed to predict whether you'll repay a loan. An insurance score is built from similar raw data but is calibrated to predict something different: the probability that you'll file a claim, and how costly that claim might be.

The underlying data sources overlap significantly. Both models look at:

• Payment history — whether you pay bills on time
• Outstanding debt — how much you currently owe relative to your credit limits
• Length of credit history — how long your accounts have been open
• Credit mix — the variety of account types you carry
• New credit inquiries — recent applications for new credit accounts

What neither model includes: your income, your employment status, your net worth, or your race. By law, insurers cannot use race, national origin, or religion in underwriting decisions.

For a side-by-side breakdown of how these two scores diverge in practice, see how an insurance risk score differs from your credit score.

How the Score Gets Built and Who Builds It

Your insurer almost certainly didn't build the scoring model they're using. Most carriers license proprietary models from third-party data companies — LexisNexis Risk Solutions and TransUnion are the two dominant players in this space. FICO also offers an insurance-specific score called the FICO Auto Score.

Each vendor has its own algorithm. That means the same credit data can produce different insurance scores depending on which model is used. It's one reason why two insurers looking at the same consumer can arrive at meaningfully different premiums — they may be using different scoring vendors, weighting factors differently, or applying the score differently within their overall rating algorithm.

“Insurers aren't looking at your credit score the way a bank does. They've built models specifically calibrated to one question: does this credit profile predict a higher likelihood of insurance losses? The answer, statistically, is yes — which is why regulators have largely allowed the practice to continue.”

— J. Robert Hunter, Former Insurance Commissioner and Director of Insurance at the Consumer Federation of America

The lack of transparency in proprietary scoring models is a legitimate consumer concern. You generally cannot see your credit-based insurance score the way you can view your FICO score through your bank. You can, however, request your credit reports from the three major bureaus — Equifax, Experian, and TransUnion — at AnnualCreditReport.com, which gives you visibility into the underlying data the models are reading.

If an insurer takes an adverse action against you — meaning they charge you more or decline to offer coverage based in part on your credit — they are federally required under the Fair Credit Reporting Act (FCRA) to send you an adverse action notice. That notice must tell you which consumer reporting agency provided the data, giving you a starting point for reviewing and disputing errors.

The Real-Dollar Impact on Your Premiums

Abstract talk about risk models lands differently when you attach actual numbers. Here's how significant the credit factor can be.

Research by the Consumer Federation of America found that a driver with poor credit pays, on average, 65% more for auto insurance than an identical driver with excellent credit. In some states and with some carriers, that premium gap exceeds 100%. On a policy that costs $1,200 per year at good credit, that means the same driver with poor credit could be paying $1,980 to $2,400 annually — a difference of $780 to $1,200 per year purely on the basis of credit history.

The impact isn't limited to auto insurance. Homeowners insurers in most states also factor in credit-based scores. A study published in the Journal of Insurance Regulation found that homeowners in the lowest credit tier paid premiums 29% to 59% higher than those in the highest tier for comparable coverage.

These aren't edge cases — they affect a substantial portion of American households. According to the Urban Institute, roughly 33% of Americans have credit scores below 670, a level at which insurance score penalties begin to bite meaningfully.

For a deeper look at how credit intersects specifically with auto rates, credit score and auto insurance: what the connection really means breaks it down with additional context.

What State Law Allows — and Where It Draws the Line

Not every state plays by the same rules. The patchwork of state insurance regulations means your credit score's influence on your premium depends heavily on your zip code.

Four states currently prohibit the use of credit information in auto insurance rating:

• California — banned by Proposition 103 (1988) and reinforced by subsequent regulations
• Hawaii — state law prohibits credit scoring for auto insurance
• Massachusetts — long-standing prohibition under state insurance regulations
• Michigan — 2019 auto insurance reform law banned credit scoring effective July 2020

Maryland, Oregon, and Utah impose restrictions on how credit can be used in homeowners insurance. Several other states require insurers to notify consumers when credit information is used and to provide an exception process for consumers whose credit was damaged by documented life events — divorce, death of a spouse, job loss, or medical emergency.

Outside of those restrictions, the remaining states give insurers broad latitude to incorporate credit-based insurance scores into their rating models. The National Association of Insurance Commissioners (NAIC) has issued model guidelines on the practice, but adoption of those guidelines varies.

For a full state-by-state breakdown of what's permitted and what's prohibited, state regulations that limit which factors insurers can use covers the legal landscape in detail.

Steps You Can Take to Improve Your Insurance Score

The good news: the same behaviors that improve your standard credit score will, over time, improve your credit-based insurance score. The bad news: it takes time, and most improvements won't show up in your premium until your next renewal.

Here's where to focus your energy:

1. Pay every bill on time. Payment history is the single largest factor in most credit scoring models. Even one 30-day late payment can meaningfully drag down your score. Set up autopay for at minimum the required minimum payment on every account.
2. Reduce revolving credit balances. Credit utilization — how much of your available revolving credit you're using — has an outsized impact on your score. Aim to keep utilization below 30% on each card and across all cards combined. Below 10% is ideal.
3. Don't close old accounts unnecessarily. Length of credit history matters. Closing a credit card you've had for 10 years shortens your average account age and can hurt your score even if the card carried no balance.
4. Limit applications for new credit. Each hard inquiry from a new credit application can ding your score slightly. Space out applications and avoid opening multiple new accounts in a short window.
5. Dispute errors on your credit report. Errors are more common than most people realize — a 2021 Consumer Reports study found that 34% of participants identified at least one error on their credit reports. An erroneous late payment or fraudulent account dragging down your score can be corrected through the bureau's dispute process.

Once you've made meaningful improvements, request a re-rate from your insurer or shop your policy with competing carriers. Premiums are not static — they respond to updated data at renewal. If your insurer isn't reflecting your improved credit profile, a competitor's model may.

For additional context on how all premium factors interact, see how credit score affects insurance premiums in most states and the broader premium factors hub.

The Ongoing Debate: Is Credit Scoring Fair?

Credit-based insurance scoring is arguably the most contested practice in personal lines underwriting. Critics raise legitimate points that consumers should understand, even if the actuarial case for the practice is well-documented.

The core criticism is disparate impact. Research has consistently shown that credit scores correlate with race and income — not because of discrimination in the scoring model itself, but because of structural economic inequalities that produce credit disparities along racial and income lines. The result is that groups that historically faced barriers to credit access — including many Black, Hispanic, and lower-income households — tend to receive worse insurance scores, and therefore pay higher premiums, than their actual driving behavior might warrant.

Proponents counter that the correlation between credit scores and claim frequency is real and significant, and that using it allows insurers to price more accurately — rewarding responsible financial behavior and keeping premiums lower for the majority of consumers who maintain good credit.

State legislatures and insurance regulators are increasingly scrutinizing this issue. The debate connects directly to questions about what insurers mean when they assess behavioral risk — a topic explored further in what insurers mean by moral hazard and why it affects underwriting.

Where you land on the debate is a matter of values and policy preference. What's not debatable is the practical reality: in most states today, your credit history is shaping your insurance costs. Knowing that — and knowing how to manage it — gives you more control over what you pay.