Skip to main content
InsureGuide

Auto Insurance

Understand the building blocks of U.S. car insurance before you compare policies.

Open auto insurance calculator

Car insurance basics

Auto insurance is a contract that can pay certain injury, property and vehicle-damage costs depending on the coverages you select. Every U.S. state except New Hampshire requires some form of auto liability insurance or an approved alternative; New Hampshire still imposes financial-responsibility rules after a qualifying accident. Confirm current requirements with your state insurance department.

Coverage types

Most personal auto policies mix liability with optional physical-damage and injury coverages.

  • Bodily injury and property damage liability
  • Collision and comprehensive (usually with deductibles)
  • Uninsured / underinsured motorist coverage
  • Medical payments or personal injury protection, where offered

Deductibles

Collision and comprehensive deductibles are the amounts you typically pay toward a covered vehicle claim. Liability claims generally do not use that same deductible. A higher deductible may reduce the premium and increase out-of-pocket exposure.

Premium factors

Insurers may consider driving history, vehicle, garaging address, coverage limits, deductibles, mileage and other legally permitted factors. Some states restrict the use of credit-based insurance scores. No website calculator can reproduce an insurer’s rating algorithm.

Frequently asked questions

Does this site sell auto insurance?

No. InsureGuide publishes educational explanations and illustrative calculators. We are not an insurer, agent or broker.

Why do state minimums differ?

Each state sets its own financial-responsibility laws. Minimum limits that satisfy a statute may still be low relative to a serious injury claim.