Why does California require prior CDI approval for auto rate increases?

Proposition 103, passed by California voters in 1988, established a prior-approval framework for auto and homeowners insurance rates. The measure was a response to years of sharply rising premiums and gave the state authority to review whether proposed rates are actuarially sound and not excessive before carriers can charge them. The CDI commissioner is directly elected, not appointed, which gives the rate-approval process an added layer of public accountability.

Can a California driver challenge a rate increase that the CDI has already approved?

Once the CDI approves a rate filing, the approved rate is legally valid. Consumers cannot appeal an approved rate on their own, but they can switch to another carrier offering a lower rate for comparable coverage. Consumer advocacy groups that participate as intervenors in the formal review process are the primary mechanism by which rate filings are challenged before approval.

How can I find out if my insurer has filed for a rate increase?

The CDI maintains a public rate filing database on its official website at insurance.ca.gov, where consumers can search by carrier name to see pending and resolved filings. The portal shows the requested rate change, the CDI's determination, and the effective date.

Does California allow insurers to use credit scores in auto insurance pricing?

No. Proposition 103 prohibits credit-based auto rate pricing in California. Carriers operating in the state cannot use a driver's credit score or credit history to set or adjust auto insurance rates. This prohibition is enforced by the CDI and applies to all personal auto policies issued in California.

California CDI Reviews 2026 Auto Rate Filings as Insurers Seek Increases

The California Department of Insurance logged a significant volume of auto insurance rate-change filings from carriers operating in the state in 2025 and the first half of 2026, as insurers continued to seek adjustments following years of elevated claims costs, according to CDI public filing records. Inflation in vehicle repair prices, higher medical costs tied to injury claims, and an active litigation environment in California courts combined to push loss ratios higher for many carriers.

California's rate-review system, established by Proposition 103 in 1988, requires that rate changes above a defined threshold receive the CDI commissioner's prior approval before taking effect. Carriers must demonstrate that a proposed rate is actuarially justified, not excessive, and not unfairly discriminatory. The department reviews each filing based on the insurer's actual loss and expense data, and consumer advocates have the legal right to formally intervene in the process.

What pressures are pushing California auto insurance rates upward in 2026?

Several structural cost factors have driven carriers to file rate adjustments across the state. Parts and labor costs for vehicle repairs have climbed in recent years, and modern vehicles equipped with advanced driver-assistance systems cost significantly more to restore after a collision than older models, according to the Insurance Information Institute. Medical inflation tied to bodily injury claims has followed a similar upward trajectory in California, where jury awards in personal injury cases have also grown.

State Farm, Mercury, Progressive, and other major carriers have all sought rate adjustments in California during this period. Mercury General, for instance, had rate filings under active CDI review in 2025, part of a broader wave of carrier activity the department was managing simultaneously. The CDI publishes all active and resolved filings through its public rate filing portal, giving consumers visibility into what is being requested and what the department has approved or denied.

How does CDI's prior-approval system work for California drivers?

Under Proposition 103, any carrier seeking to raise auto rates above the defined threshold must submit a formal rate filing to the CDI and wait for approval before the increase takes effect. The commissioner's office reviews the filing against the insurer's own loss data and actuarial projections. If the CDI concludes the rate is excessive, it can order a reduction or reject the filing outright.

Filings below the regulatory threshold follow a shorter review path and may take effect without a full hearing, though they are still subject to CDI oversight. Above-threshold filings that draw an intervenor challenge can take considerably longer, sometimes extending into a formal public hearing. This process is unique among U.S. states and gives California consumers a structured avenue to contest rate increases before they take effect, according to the Insurance Information Institute.

What are California's updated auto insurance minimums in 2026?

California law requires all registered passenger vehicles to carry liability coverage. A 2023 California statute raised the state's minimum liability limits, which had been unchanged for decades, to $30,000 per person and $60,000 per accident for bodily injury, along with $15,000 for property damage, with the new minimums taking effect in 2025, according to CDI guidance. Drivers who cannot demonstrate financial responsibility may face fines and registration suspension under the state's enforcement procedures.

The CDI strongly recommends that California drivers carry coverage above the statutory minimums. Uninsured and underinsured motorist coverage, while not mandatory, provides a critical buffer in Los Angeles, the San Francisco Bay Area, Sacramento, and other high-traffic California markets where uninsured drivers remain a persistent concern.