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Insurers don't set your rate at random. Behind every quote is a set of factors an underwriter uses to estimate risk, plus a broader system of how insurers themselves are rated, grouped and paid. Here's how the pieces fit together.
Most insurers factor in a credit-based insurance score, built from the same underlying data as your regular credit report. Insurers have found a statistical link between financial responsibility and claims behavior: on average, people with lower scores file more and larger claims. A stronger score generally means a lower quote; a weaker one usually means a higher one, or in some cases a company declining to offer coverage at all. Being placed in a less favorable pricing tier isn't a judgment on you personally — it reflects the average claims history of people with a similar score, not your own driving. A handful of states (including California, Hawaii and Massachusetts) don't allow insurers to use credit scoring for auto insurance at all.
Two very different kinds of ratings matter when you're choosing an insurer. Financial-strength ratings, from agencies like AM Best, Moody's or S&P, assess whether a company can actually pay out claims — useful to know before you hand over a premium. Customer-satisfaction ratings, most visibly from J.D. Power, come from surveys covering things like billing clarity, how wide a company's coverage options are, and how easy it is to reach support or file a claim. A company can score well on one and poorly on the other, so it's worth checking both before you buy.
If your driving record makes it hard to get a standard policy, most states run an assigned-risk pool (sometimes called a Joint Underwriting Association) — a system where licensed insurers can't refuse to cover you, though they can charge their own rates within it. In California, that's the California Automobile Assigned Risk Plan (CAARP); in New York, it's the New York Automobile Insurance Plan (NYAIP). Either way, you're assigned to a participating carrier that's required to cover you, typically for a minimum period (often around three years), after which a clean record can get you back into the standard market.
Liability coverage — the minimum required almost everywhere — is highly competitive and low-margin; insurers mostly use it to win customers they can then sell other coverage to. Collision and comprehensive coverage carry much thicker margins for essentially protecting the same vehicle. The math works because losses are pooled: most policyholders never file a major claim, so the premiums they pay cover the smaller number who do, with room left for profit. Deductibles help too, by taking the smallest, most common claims off the insurer's books entirely — and a lot of drivers pay for minor repairs out of pocket anyway, since filing a small claim can push their premium up.
The car you drive affects your premium independently of your own driving record. Insurers weigh the vehicle's price and replacement cost, how it performs in crash and safety testing, typical repair costs, and how available parts are (an imported or low-production model can mean pricier, slower repairs). Vehicles with strong safety ratings and lower theft rates generally cost less to insure; higher-performance and harder-to-repair vehicles generally cost more.
When another driver is clearly at fault but their insurer is slow to pay, your own insurer can pay your claim first and then recover the money from the at-fault driver's insurer — a process called subrogation. Say another driver causes $2,000 in damage to your car; if your insurer pays the claim while you cover your $500 deductible, it will then try to recoup its $1,500, and often your deductible too, from the at-fault driver's insurer. This happens behind the scenes with little effort from you, but a track record of successful subrogation recoveries is one reason larger insurers with strong legal departments can sometimes offer better long-term rates.
AutoInsuranceQuery editorial team. Last reviewed: September 16, 2026.
