If you’ve recently purchased a new vehicle, you know that in order to drive in most states, you need to purchase a basic type of car insurance, but you may be overwhelmed by your coverage options. Comprehensive and collision are the two types of physical damage coverage available on car insurance policies. Both play an important role in keeping your vehicle in tip-top shape. Minor dents and dings all the way up to full-blown car crunching can be repaired, or the insurance company can at least pay out enough money to make you whole again.
Insurance can influence the probability of losses through moral hazard, insurance fraud, and preventive steps by the insurance company. Insurance scholars have typically used moral hazard to refer to the increased loss due to unintentional carelessness and insurance fraud to refer to increased risk due to intentional carelessness or indifference.[22] Insurers attempt to address carelessness through inspections, policy provisions requiring certain types of maintenance, and possible discounts for loss mitigation efforts. While in theory insurers could encourage investment in loss reduction, some commentators have argued that in practice insurers had historically not aggressively pursued loss control measures—particularly to prevent disaster losses such as hurricanes—because of concerns over rate reductions and legal battles. However, since about 1996 insurers have begun to take a more active role in loss mitigation, such as through building codes.[23]
To make things easier, NerdWallet has done the heavy lifting for you. We analyzed rates from the largest 11 insurers in California and found the cheapest options for several common driver types in the Golden State. We also have information on low-income car insurance in California, auto insurance laws and how to know which AAA group serves your county.
California’s insurance laws are uniquely consumer-friendly, according to many experts. A lot of that is thanks to Proposition 103, which was approved by voters in 1988 and immediately required insurers to roll back prices 20%. Proposition 103 also mandated that auto insurance rates be preapproved by the state’s department of insurance, among other regulations. Many of the laws detailed below are from Proposition 103, but not all.

If your car is worth more than $3,000 and/or is less than 10 years old, we'd also suggest both collision and comprehensive coverage, too. Our estimates suggest drivers can buy comprehensive and collision insurance for an average of $600 to $700 per year (however, the cost may be higher for some cars), so you would spend $3,000 to $3,500 in premiums over five years. If your car is currently worth less than $3,000, you will have spent more on insurance than your car is worth. You can obtain the estimated value of your car from sites like Kelley Blue Book and Edmunds. Once you have both the value and a quote for coverage, you can determine whether collision insurance will be worth it.

Car insurance helps provide financial protection for you, and possibly others, if you are involved in an accident. Auto insurance for your vehicle is usually required by all states. Review our state car insurance guides to see the different laws and auto insurance minimum required coverages. You can customize your auto policy to fit your needs. There are different coverages and limits you can choose to create your auto insurance policy. Check out our car insurance coverage page to learn more about each type of coverage.
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