The six coverages inside a standard auto policy

A U.S. personal auto policy is not a single product. It is a bundle of separately priced coverages, and understanding which one pays in which situation is the difference between a policy that works and one that surprises you.

  • Bodily injury liability. Pays other people's medical bills and lost wages when you are at fault. Written as two numbers, such as 100/300 — $100,000 per injured person, $300,000 per accident.
  • Property damage liability. Pays for the other driver's vehicle and any property you damage. Never pays for your own car.
  • Collision. Pays to repair or replace your car after an impact, regardless of fault, minus your deductible.
  • Comprehensive. Covers non-collision losses: theft, hail, flood, fire, vandalism, a deer strike, a cracked windshield.
  • Uninsured and underinsured motorist. Steps in when the at-fault driver has no insurance or not enough of it. In several states this is mandatory, and it is one of the most under-bought coverages in the country.
  • Medical payments or personal injury protection (PIP). Covers your own and your passengers' medical costs. PIP is required in no-fault states; MedPay is optional in most others.

Liability limits are the coverage that protects your savings and future earnings, and they are usually the cheapest to increase. Collision and comprehensive protect the car itself, and they are where deductible choices move the price.

What drivers actually pay

The most reliable national figures come from the National Association of Insurance Commissioners (NAIC), which collects data directly from insurers and state regulators rather than from quote forms.

In the NAIC's 2022/2023 Auto Insurance Database Report, the national average expenditure was $1,281 per insured vehicle per year in 2023 — a 19.24% increase over 2019. The average written premium per insured vehicle, a slightly different measure, was $1,438 in 2023, up 14.42% in a single year.

Averages hide enormous state variation. Florida was the most expensive state in that dataset at $1,863.82 per insured vehicle. For collision coverage specifically, the District of Columbia carried the highest average premium at $663.87, while Iowa was the lowest at $312.87 — more than a two-to-one spread for the same coverage type.

One methodological point worth understanding: NAIC's "expenditure" figure assumes every insured vehicle carries liability, but not necessarily collision or comprehensive. That is why expenditure does not equal the sum of the three coverages added together, and why a full-coverage policy on a financed car will typically run well above the headline average.

What actually drives your premium

Insurers price from a long list of rating factors, but they are not equally powerful, and several of the ones people worry about matter less than they assume.

  • Where you garage the car. ZIP-code-level claim frequency, repair labor rates, theft rates and litigation environment. This is usually the single largest input, and it is why the same driver pays wildly different rates across state lines.
  • Driving record. At-fault accidents and moving violations typically affect pricing for three to five years, depending on state rules and the insurer's own filings.
  • Credit-based insurance score. Used in most states, though California, Hawaii, Massachusetts and Michigan restrict or prohibit its use in personal auto rating.
  • The vehicle. Repair cost and parts availability matter more than sticker price. Vehicles with expensive sensor-laden bumpers and windshields can cost more to insure than pricier cars with cheap parts.
  • Annual mileage and use. Commuting versus pleasure use, and whether you enroll in a telematics program.
  • Coverage choices. Your deductible and your liability limits, which you control directly.

How to compare policies without losing protection

The fastest way to get a genuinely comparable set of quotes is to fix the coverage and let only the price vary.

  1. Write down your target coverage first. Decide your liability limits, uninsured motorist limits, and deductibles before you request a single quote. Then request that exact configuration from every insurer.
  2. Get at least three quotes at each renewal. Insurers refile rates constantly and the cheapest carrier for your profile changes over time. Loyalty is rarely rewarded in this market.
  3. Check the complaint index, not just the price. The NAIC Consumer Information Source publishes a complaint index for every licensed insurer, where 1.00 is the market median. A carrier at 2.00 draws twice the complaints its market share would predict.
  4. Confirm what is not included. Rental reimbursement, roadside assistance, gap coverage and OEM-parts endorsements are usually separate line items.
  5. Read the declarations page when the policy arrives. This is the only document that states your actual coverage. If it does not match what you were quoted, call before the first claim, not after.

Mistakes that cost real money

Carrying state-minimum liability. Many state minimums were set decades ago and have not kept pace with vehicle and medical costs. A single serious injury claim can exceed a $25,000 per-person limit quickly, and the balance is yours.

Skipping uninsured motorist coverage. The Insurance Research Council has consistently found roughly one in seven U.S. drivers is uninsured, with far higher rates in some states. UM coverage is generally inexpensive relative to what it protects.

Keeping collision on a car that is worth less than the payout math. If your car's actual cash value is $2,500 and your deductible is $1,000, the most collision can ever pay you is $1,500. At some point the premium stops making sense.

Assuming your policy covers business use. Delivery driving, rideshare and hauling for a business are commonly excluded from personal auto policies. That is what commercial auto insurance exists for.

Frequently asked questions

No. “Full coverage” is shorthand for a policy carrying liability plus collision plus comprehensive. It is not a defined product, it is not standardized, and it does not mean everything is covered. Always read the declarations page for the actual coverages and limits.
It depends on the insurer and the state. Comprehensive claims are non-at-fault by nature and many carriers treat them differently from collision claims, and several states restrict surcharges for glass-only claims. Ask the specific carrier before filing, because practice varies.
A common rule of thumb is to carry liability limits at least as high as your net worth, because assets above your limit are exposed in a judgment. If that number is high, an umbrella policy is usually cheaper per dollar of protection than raising auto limits alone.
Insurers file rate changes with state regulators based on overall loss trends — repair costs, medical inflation, litigation and severe weather in your territory. A rate increase applied to an entire class of drivers is not a reflection on your individual record.

Sources

Every figure above is drawn from the following publications. Links open on the publisher's own site.

IW

InsureWiseHub editorial team

We write plain-language explainers about U.S. insurance and cite a primary source for every number. We do not sell insurance and we are not paid by insurers. Read our editorial policy.

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