The National Association of Insurance Commissioners (NAIC) is launching a nationwide homeowners' market data call that will drill down to ZIP-code-level detail, in what regulators described as the most comprehensive collection of home insurance policy data ever undertaken in the US.
Announced at the NAIC’s spring national meeting, the initiative is intended to give state regulators a granular view of how homeowners' coverage is priced, underwritten and maintained across different geographies and perils at a time when availability and affordability are under intense scrutiny.
According to a report from BestWire, regulators plan to use the information to assess how policy terms and deductibles affect cost and access, evaluate mitigation efforts, monitor carriers’ financial strength and better understand consumer awareness of insurance.
Insurers writing at least $50,000 in relevant homeowners' premium must submit data by June 15, covering policy years 2018 through 2025. A public report is slated for early 2027.
The NAIC is asking for detailed information including policy type, premiums, claims and losses by peril, deductibles, cancellations and nonrenewals, coverage limits, replacement cost versus actual cash value, and mitigation discounts.
“Our state-led data call will help equip us with even more information, tools and resources to not only speed resilience but also increase preparation before severe weather hits,” Florida Insurance Commissioner Mike Yaworsky, who chairs the NAIC’s Homeowners Market Data Call Task Force, said in a statement.
The project builds on a 2024 agreement between the US Treasury’s Federal Insurance Office (FIO) and the NAIC to share and standardize homeowners' insurance data, after Treasury warned that climate-related events were driving up costs and eroding availability in many regions.
The data call comes against a backdrop of mounting climate and market stress in US homeowners' insurance.
According to BestWire, Treasury’s January 2025 report concluded that homeowners' insurance costs are rising and availability is declining, particularly in states exposed to wildfires, hurricanes and convective storms. From 2018 to 2023, the state insurers of last resort in California, Florida and Louisiana saw their policy counts roughly double as private carriers pulled back, with Florida’s Citizens Property Insurance Corporation growing to about 1.4 million policyholders and becoming the state’s largest home insurer.
High-profile carrier retrenchments have amplified political pressure. State Farm and Allstate halted new homeowners' business in California in 2023, citing wildfire risk and inflation, and State Farm later sought a double-digit homeowners' rate increase in 2025 to shore up its capital after major wildfires. In Florida, legislative reforms have encouraged some new capital, but Citizens still holds more than 1.3 million policies and roughly one in five homeowners is estimated to have no insurance at all.
Separate analysis by Weiss Ratings of NAIC data found that homeowners in Florida and California were dropped by their insurers at the highest rates in the country in 2024, with Louisiana experiencing the sharpest jump in nonrenewal rates over the past five years. That kind of state-level variation is exactly what regulators hope the ZIP-code-level homeowners data will help explain.
Trade groups acknowledged that the request is highly detailed and resource-intensive, but some see it as a necessary step toward a more evidence-based policy debate.
Erica Weyhenmeyer (pictured), policy vice president for market regulation and workers’ compensation at the National Association of Mutual Insurance Companies (NAMIC), said the design of this year’s call represents “meaningful progress” in terms of transparency and execution. She noted that the focus on affordability, availability and catastrophe risk mirrors the legislative and social questions regulators are trying to answer.
“For years, insurers have highlighted that the primary pressures on affordability and availability, such as legal system abuse, building costs, and exposure to extreme weather, lie largely outside the industry’s control,” she said. “We expect the data call findings will affirm that conclusion and show that states which maintain balanced regulatory frameworks - including litigation reform and flexibility in rate, form, and underwriting - deliver the most stable and resilient markets for consumers.”
At the same spring meeting, the NAIC also gave an update on its Artificial Intelligence Systems Evaluation Tool, which is being piloted with a group of volunteer insurers in 2026. The tool is designed to give regulators a structured way to examine how carriers govern and monitor AI systems used in underwriting, claims and marketing, the report said.
The NAIC’s Big Data and Artificial Intelligence Working Group plans to refine the tool based on pilot feedback and re‑expose it for public comment later in 2026, with formal adoption targeted for the fall national meeting. This work builds on the NAIC’s 2023 AI Model Bulletin, which set out principles for responsible AI use in insurance.
Taken together, the homeowners' data call and the AI evaluation pilot underscore a broader supervisory push: regulators want much more visibility both into the data and models shaping homeowners' pricing and into the algorithms insurers use to segment and underwrite risk.
The implications will be most visible for the largest homeowners' writers, which collectively dominate the line. In 2024, the top five homeowners' multiperil carriers by direct premiums written were State Farm Group (18.20% market share), Allstate Insurance Group (8.96%), USAA Group (6.88%), Liberty Mutual Insurance Cos. (6.14%) and Farmers Insurance Group (5.50%), according to BestLink.
State Farm’s homeowners premiums alone exceeded $30 billion in 2024 - its fastest growth in more than two decades - driven partly by steep rate increases in catastrophe‑exposed states. Those national groups, along with a long tail of regional and specialty writers, will now have to open their books to a level of geographic and peril detail that could reshape how regulators, lawmakers and consumer advocates view the balance between risk, price and availability in the US homeowners' market.
