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Insights
Intrastate Regional Cost Differences
Intrastate Regional Cost Differences
NCCI Page Content Two
​​​​​InsightsWhat's Trending
 
 
 
 
By Andrew Makarov, Ashley Lowenberg,
Damon Raben, and Katherine LeveenDecember 04, 2025
​
Page Content

This report provides a collection of actuarial metrics to compare differences across geographic regions within NCCI’s three largest jurisdictions by population—Florida, Illinois, and Texas. These metrics provide insight into regional differences in frequency, severity, and overall costs across these jurisdictions. Every state has its own story, and by examining these metrics, we expand on the story.

Key Insights

  • Regional differences in frequency, severity, and overall costs exist within NCCI’s three largest states by population: Florida, Illinois, and Texas.
  • Neither frequency nor severity were identified as consistent drivers of the loss ratio relativities across regions.
  • Differences in results were found for cohorts of policies that span single versus multiple regions within a state.

Analysis Summary

The three primary data sources underlying this report are Policy Data, the Unit Statistical Plan, and the Medical Data Call. Exposure and losses are not reported for each individual business location in these data sources; therefore, estimation was necessary to allocate total policy experience across business locations.

Actuarial metrics are based on data from Policy Years 2021–2023. All losses are incurred at first report and are limited to $500K.

A ​downloadable file accompanies the report for a deeper dive into the data.

Conclusion

The regional differences in frequency, severity, and overall costs expand the individual state story for Florida, Illinois, and Texas. Looking forward, NCCI is considering periodic updates to this analysis. As future data collection expands and evolves, NCCI may revisit opportunities to research additional states.

The complete report offers more information on actuarial analysis including loss ratio relativities, frequency and severity relativities, and claim ratio deviations.

Connect with our team if you have questions or want to gain additional insights.

​This article is provided solely as a reference tool to be used for informational purposes only. The information in this article shall not be construed or interpreted as providing legal or any other advice. Use of this article for any purpose other than as set forth herein is strictly prohibited.
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