How car insurance rates are determined
By Colson · Updated June 13, 2026
Car insurance rates are set by combining rating factors that predict claim risk: your age, where you live, your vehicle, driving record, credit-based insurance score (in most states), mileage and the coverage you choose. Each insurer weighs these differently, which is why quotes vary so much.
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Age and experience matter most — teens pay multiples of what middle-aged drivers pay. Location is next: state regulations, traffic density, theft and weather drive big differences by ZIP code. Your driving record (accidents, tickets, DUIs) and, in most states, your credit-based insurance score also weigh heavily.
Vehicle, mileage and coverage
The car you drive affects repair and theft costs, so a safe, common, inexpensive-to-repair vehicle is cheaper to insure than a high-performance or frequently-stolen one. How much you drive (annual mileage) and the coverage and limits you choose round out the price.
Why the same driver gets different quotes
Each insurer has its own formula and target customers, so the same profile can vary by hundreds of dollars between companies. That's why comparing quotes for identical coverage is the single most reliable way to lower your premium.
Frequently asked questions
What is the biggest factor in car insurance rates?
Age and driving record are typically the largest, followed by location (your ZIP code's risk) and, in most states, your credit-based insurance score. Younger and higher-risk drivers pay substantially more.
Does credit affect car insurance?
In most US states, yes — insurers use a credit-based insurance score that correlates with claim likelihood. A few states (e.g., California, Hawaii, Massachusetts) restrict or ban the practice.
Why is my car insurance so expensive?
Usually a combination of your age, location, vehicle, record and coverage level. Comparing quotes, raising your deductible and claiming discounts are the fastest ways to bring it down.
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