Transforming California's Excess and Surplus Lines Insurance Market

For years, the excess and surplus (E&S) lines market in the United States primarily covered high-risk or unique properties that standard insurers avoided. Traditionally considered a "safety valve" for unusual insurance needs, its role in California has significantly transformed. In 2025, the number of surplus lines homeowners policies in California exceeded 300,000, reflecting a major shift in the state's insurance landscape, as reported by the Surplus Line Association of California (SLACAL).

This increase is reshaping California's property insurance sector, where surplus lines are no longer confined to high-risk properties prone to wildfires. Recent analysis by SLACAL data scientist Mikhail Gorshunov indicates a decline in wildfire exposure among these policies. Urban areas like Los Angeles and San Diego now constitute a substantial portion of all E&S placements, with cities such as Bakersfield and San Jose seeing considerable growth in surplus lines policies.

The transition to E&S coverage is attributed to market scarcity rather than rising risk levels. California's insurance market, influenced by Proposition 103 from 1988, plays a key role. This law was designed to protect consumers by requiring pre-approval for rate increases and involving consumer participation in rate-setting proceedings. However, it has struggled to keep pace with modern challenges, such as more frequent and intense wildfires, complicating insurers' ability to adjust rates swiftly.

Proposition 103 mandates that insurers use up to 20 years of historical loss data when setting rates, preventing forward-looking models and reinsurance costs from being included. This outdated approach has led major insurers like State Farm and Allstate to reduce their presence in California. Consequently, many homeowners have turned to the E&S market or the California FAIR Plan, the state’s insurer of last resort, which has also seen significant growth.

California's Insurance Commissioner, Ricardo Lara, introduced the Sustainable Insurance Strategy to tackle these issues and reintegrate admitted insurers into the market. This initiative permits insurers to use catastrophe modeling and reinsurance costs in premium calculations, encouraging some insurers to stay or return. Despite progress, Proposition 103's deep-rooted reform challenges continue to obstruct comprehensive change.

Surplus lines carriers, exempt from Proposition 103’s rate approvals, quickly adjust premiums to reflect actual risk. However, this flexibility results in reduced regulatory oversight and diminished consumer protection. Consumers in the surplus lines market deal with less standardized policy language and lack state guaranty fund protection.

California's scenario signals potential trends in other states facing similar issues, like Florida, Texas, Colorado, and Louisiana. As surplus lines carriers offer solutions where admitted markets fall short, the implications for the property insurance industry nationwide could be substantial. The ongoing balance between market adaptability and regulatory compliance requirements will influence the future of insurance in catastrophe-prone regions.