Legal Professional Liability Insurers Continue Growth Amid Emerging Risks

Legal professional liability (LPL) insurers have expanded their financial strength over the past decade while navigating a competitive market and evolving liability exposures, according to AM Best's Best's Market Segment Report: Specialty Legal Professional Liability Insurers Continue to Grow, Despite Varied Performance. According to AM Best, policyholders' surplus for its specialty LPL composite increased to approximately $2.4 billion in 2025 from $1.2 billion in 2015, while premium growth remained comparatively modest.

The report examines a composite of 16 insurers specializing in legal professional liability coverage, including both rated and unrated insurers. Per the report, many of these companies are single-state writers that have limited premium growth despite substantial increases in surplus over the past decade. Aggregate net premiums written increased to $485 million in 2025 from $416 million in 2015, while direct premiums written rose to $728 million from $602 million during the same period.

AM Best said LPL insurers face a range of challenges tied to the changing legal environment. These include social inflation, third-party litigation financing, increasing nuclear verdicts, technological change, cyber-security concerns, and the adoption of artificial intelligence (AI). The report notes that insurers must understand how these factors affect law firms in order to develop appropriate coverage solutions and maintain profitable operations.

Operating performance within the segment has generally compared favorably with the broader commercial casualty market. According to the report, the specialty LPL composite posted a better operating ratio than the commercial casualty composite in 8 of the last 10 years. In 2024, the specialty LPL composite reported an operating ratio of 58.7 compared with 84.7 for the commercial casualty composite. AM Best attributed much of this advantage to the segment's strong net investment income.

At the same time, underwriting results have been more volatile than those of larger commercial casualty insurers. Per AM Best, the relatively small number of companies in the composite and their modest premium volumes can lead to significant year-over-year fluctuations in underwriting ratios. The report notes that the composite's combined ratio reached 107.0 in 2025, reflecting deterioration at certain insurers and less favorable reserve development.

Competition remains intense across the market, according to the report. Capacity remains available for small, mid-sized, and large law firms, with insurers competing for desirable accounts through pricing and expanded coverage limits. AM Best said specialist LPL insurers also face competition from larger multinational professional liability insurers, requiring continued focus on product development and customer service.

The report highlights the growing impact of social inflation on the segment. According to AM Best, jury awards exceeding $10 million have become more common, while verdicts exceeding $100 million (sometimes referred to as "thermonuclear verdicts") have also increased. Citing data from Sedgwick, the report notes that 2024 saw a 52-percent increase in jury awards above $10 million and an 81.5-percent increase in awards exceeding $100 million.

Third-party litigation financing has become another important factor affecting the market. Per the report, investors increasingly fund legal cases in exchange for a share of potential awards, helping fuel growth in a multibillion-dollar industry. AM Best noted that the expansion of litigation financing has drawn scrutiny from lawmakers and regulators in several states.

Loss adjustment expenses also remain elevated within the LPL segment. According to the report, the specialty LPL composite's loss adjustment expense ratio has consistently exceeded that of the commercial casualty composite over the past 5 years. AM Best attributed this in part to the claims-made structure of LPL policies, which often results in higher claim-related expenses.

While claim frequency among law firms has remained relatively stable, claim severity continues to rise. Per the report, increasing defense costs, a growing number of million-dollar-plus claims, inflationary pressures, cyber-security risks, AI-related exposures, and heightened regulatory scrutiny have contributed to a harder pricing environment since 2020. Direct premiums written by the composite have increased more than 18 percent from 2020 through 2025 after growing less than 1 percent during the previous 5-year period.

Looking ahead, AM Best expects premium growth within the specialty LPL segment to moderate. According to the report, year-over-year premium growth is likely to remain in the 1 percent to 2 percent range during the remainder of 2026. The rating agency said heightened legal complexity and increasing regulatory scrutiny are expected to reinforce the need for strong risk management and underwriting discipline across the sector.

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