A recent analysis of insurer reserve behaviors across the United States reveals a notable trend: 45% of the top 20 insurers by reserve-to-paid-loss ratio adopted a conservative approach to reserving, while 30% took an aggressive stance. The remaining 25% maintained actuarial precision.
This insight comes from a newly launched property and casualty loss development and reserve analysis tool, which evaluates the year-over-year development of incurred versus paid losses for over 700 insurance groups. Using a heat-mapped grid and drill-down tables, the tool classifies carriers based on how their reserves align with actual paid claims.
Over a five-year development period starting in 2019, only 25% of the top 20 insurers by reserve-to-paid-loss ratio fell into the actuarial precision zone (with a ratio between 0.9 and 1.5), indicating well-calibrated assumptions and data-driven reserving. This represents a notable increase from just 15% during the 2018–2023 development period.
This shift is likely driven by several factors, including evolving regulatory and accounting standards such as IFRS 17 and NAIC requirements. These standards discourage excessive conservatism, which can distort a company’s financial position, and penalize under-reserving, which poses risks to solvency.
Advancements in data analytics, predictive modeling, and machine learning are also enabling insurers to access vast amounts of real-time claims data. These tools reduce uncertainty and allow actuaries to set reserves with greater accuracy, limiting the need for conservative buffers.
In recent development years, particularly from 2020 to 2024, the reserve-to-paid-loss ratio has trended sharply downward for most insurers. This ratio, which compares carried reserves to cumulative paid losses, helps assess reserve sufficiency by showing how much reserve remains for every dollar already paid in claims. While a ratio below 0.9 isn’t necessarily problematic in isolation, a widespread and sustained decline may indicate that many companies are under-reserving — potentially to boost near-term financial results or due to overly optimistic assumptions about claim development.
The analysis reveals that a significant number of insurers are operating with reserve-to-paid-loss ratios below 1.0, suggesting a trend toward under-reserving.
While advancements in data analytics and evolving regulatory standards have led to more precise reserving practices, the industry must remain vigilant. A widespread trend toward under-reserving could pose risks to insurers' financial stability and solvency.
For a complete breakdown of loss development, reserve composition, and reserve adequacy benchmarking, visit the IB+ Property and Casualty Loss Development and Reserve Analysis Insights Dashboard.
