How is car insurance calculated in the U.S.?
U.S. insurers take a starting rate and stack on a bunch of risk factors. The biggest one is your state — full-coverage averages run from around $1,400 a year in the cheapest states to over $4,000 in the priciest. After that come your coverage level, age, driving record, credit score, vehicle, mileage, and deductible. This tool works the same way, so your number moves like a real premium would.
You don't need to share who you are. Insurers work from buckets of risk — a state, an age range, a credit tier — not individual identities. Everything runs right in your browser. Nothing gets sent, saved, or sold.
What affects your U.S. car insurance rate?
- State — the #1 factor. Local crash rates, theft, repair costs, weather, and state laws all play into it.
- Coverage level — state-minimum liability is cheapest; full coverage (adding collision and comprehensive) costs roughly 2.5× as much.
- Driving record — a big one: an at-fault accident bumps rates about 49% on average, and a DUI about 88%.
- Age — teen and under-25 drivers pay the most; a 16-year-old can pay well over double a driver in their 30s.
- Credit-based insurance score — used by many insurers, but banned in California, Hawaii, Massachusetts, and Michigan.
- Vehicle, mileage & deductible — pricier or higher-powered cars, more miles, and lower deductibles all push the premium up.
Frequently asked questions
- Is this car insurance calculator free?
- Yes — totally free, no account, no paywall, nothing to buy. It works right in your browser.
- Do I need to enter personal details?
- No. It uses only general categories. We never ask for your name, address, email, license number, or VIN.
- Does this use my credit score?
- Many U.S. insurers factor in a credit-based insurance score, so it's included here — but you just pick a general range and nothing gets looked up. Credit-based pricing is banned in CA, HI, MA, and MI.
- Why does my state matter so much?
- State is the #1 factor. Local crash rates, theft, repair costs, weather, and state laws all feed into it. Full-coverage averages range from about $1,400 to over $4,000 a year.
- How can I lower my rate?
- Keep your record clean, bump up your deductible, build your credit where it counts, drive less, pick a cheaper car, and shop around. Try changing each field above to see the effect.