Car insurance: The powerhouse of US property & casualty

For over a decade, automobile insurance has reigned supreme in the US property and casualty (P&C) market - and its dominance shows no signs of fading.  

A decade on top  

In 2024, car insurance claimed 41.6 % of the P&C market - solidly ahead of property coverage (35.7%) and liability insurance (19.5%). In raw premiums, private-passenger auto insurance brought in an impressive $344 billion by March 3, 2025—nearly 35% of all written premiums.  

Why cars continue to rule  

• Mandatory protection: Most US states require auto insurance - creating unparalleled, built-in demand.  
• Sheer scale: With millions of vehicles on the road, auto coverage naturally dominates P&C revenue streams.  
• High engagement: Frequent renewals and high claim volumes keep this line vibrant.  
• Bundling-friendly: Insurers often tie auto to home and other lines - boosting customer retention and profit.  

Premiums, tariffs & market shifts  

Rising repair costs and recently imposed tariffs on imported autos and parts are expected to increase claim expenses - likely pushing premiums higher. And for states with no-fault systems (like Michigan), regulatory changes are reshaping coverage demand, prompting insurers to pivot and educate clients on evolving policy needs.  

Bottom line  

Car insurance isn’t just a pillar of US P&C - it defines it. With its legal necessity, massive scale, and strategic advantages, it’s the linchpin of any insurer’s growth strategy. As costs climb and regulations evolve, innovation in pricing, claims handling, and bundled offerings will determine who leads the pack.  

 A full breakdown of the property and casualty lines of business can be found in the Property and Casualty Line of Business Performance and Market Trends dashboard.    

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