What a credit-based insurance score is
Most auto and home insurers use something called a credit-based insurance score when they set your premium. It is built from your credit report, but it is not the same as the FICO score a lender uses to decide on a loan.
Instead of predicting whether you will repay a debt, this score is designed to predict how likely you are to file an insurance claim. Insurers have found a statistical link between certain credit patterns and claim frequency, so they use it as one factor among many.
The score draws on familiar pieces of your credit file, such as your payment history, how much of your available credit you use, the age of your accounts, and recent applications for credit. A stronger credit profile often lines up with a more favorable insurance score.

Where it is used and where it is not
In most of the United States, insurers are allowed to use credit-based insurance scores, and the practice is widespread for both auto and home policies. For many households, it is one of the larger hidden factors in the premium they pay.
A handful of states restrict or ban the practice. California, Hawaii, and Massachusetts prohibit using credit for auto insurance pricing, and other states like Washington have moved to limit it. Rules differ for auto versus home, so your state matters a great deal.
Because the laws vary and change, it is worth checking how your own state treats credit in insurance. Where it is allowed, improving your credit profile can be one of the few levers you control over your premium.
A soft pull, not a hard one
Here is reassuring news. When an insurer checks your credit for an insurance score, it is a soft inquiry, not a hard one. Soft inquiries do not lower your credit score and are not visible to lenders.
That means shopping around for insurance quotes will not ding your credit the way applying for several loans might. You can compare carriers freely without worrying that the quotes themselves are hurting your file.
It also means the insurance score is a quiet, behind-the-scenes use of your credit. You generally will not see it on your own report, even though it may be shaping your rate.
How to improve the score behind your premium
The habits that strengthen a credit-based insurance score are the same ones that build a strong credit file overall. Pay every bill on time, since payment history carries the most weight, and keep your credit card balances low relative to their limits.
Avoid opening a flurry of new accounts right before you shop for insurance, let your accounts age, and keep older accounts open when it makes sense. Steady, boring consistency is exactly what these models reward.
Check your credit reports for accuracy, because an error that drags down your credit could quietly be inflating your premium too. If you find information that is genuinely inaccurate, you have the right under the FCRA to dispute it with the bureau for free, and you file that dispute yourself. If an insurer raises your rate because of your credit, they must send you an adverse action notice explaining it.
Your credit reaches further than loans, quietly shaping what you pay to protect your car and home, which is one more reason to build it with care. Subefy helps you strengthen the same habits that lift your insurance score, with three-bureau monitoring and free self-serve dispute tools for errors. Estimates are educational, results vary, and no specific result is guaranteed.