Massachusetts Property & Casualty Insurance Market Reaches $37.3B in 2025
The Massachusetts property and casualty insurance marketplace reached a total size of $37.3 billion in 2025, according to data from IBISWorld and the NAIC, making it the ninth-largest industry in the Bay State, according to IBISWorld.
Industry Growth and Employment
The data suggests that from 2020 to 2025, the Massachusetts Property, Casualty, and Direct insurance sector expanded at an average annual rate of 3.5%, reflecting resilience through broader economic cycles. Over the same five-year period, the number of businesses in the industry increased at an annualized rate of 1.4%, resulting in a total of 262 companies statewide.
Employment within the sector also inched upward, reaching 19,622 workers in 2025, with jobs in the industry growing at a 1.2% annual rate during the period. The expansion in payrolls tracks with the industry’s growth in premium volume, as insurers continue to invest in underwriting, claims, and customer service operations across the Commonwealth.
Market Leaders
According to the NAIC’s latest data, MAPFRE Insurance Group retained its position as the largest property and casualty writer – Total All Lines in Massachusetts with an 8.56% market share and direct premiums written of nearly $2.0 billion. The Spain-based insurer continues to rely on its Webster-based operations to anchor its U.S. business.
National carriers hold several of the following positions within the Commonwealth. Second to MAPFRE is the Travelers Group with a 6.03% share of the market, reflected in its $1.39 billion in direct premiums. Following these top two insurers are Berkshire Hathaway Group at 5.97% and Liberty Mutual Group at 5.70%. Progressive, which has been expanding its presence in the auto segment, held 4.26% of the Massachusetts market with $984 million in premiums written.
Massachusetts-based carriers maintain a significant footprint. Ranked as the fifth-largest insurer, Total All Lines is Boston-based Safety Insurance Group, which wrote $1.13 billion in premiums, representing a 4.90% market share. As the seventh-largest insurer in this category, Arbella Insurance Group posted $1.05 billion in premiums, accounting for 4.54% of the market. Plymouth Rock Insurance and The Hanover Insurance Group also ranked among the top 10. Collectively, the four local carriers control more than 15% of the state market, underscoring the enduring importance of regional players in the Commonwealth.
Loss Ratios and Performance
Loss ratio trends across the top 10 carriers varied but generally fell in a range of 40% to 65%. Safety and Plymouth Rock reported higher loss ratios above 60%, while Chubb, Liberty Mutual, and Hanover posted ratios closer to the mid-40% level. These figures reflect differences in underwriting appetite, product mix, and claims experience across the market.
Concentration and Fragmentation
Despite the size of the leading companies, the Massachusetts market remains relatively fragmented. The top 10 insurers collectively control just over 50% of the state market, leaving a substantial share divided among dozens of smaller carriers. This distribution enables competition across auto, homeowners, and commercial lines, with independent agents continuing to play a vital role in placing coverage.
Massachusetts in the National Context
The state’s $37.3 billion property and casualty (P&C) sector is situated within a broader Massachusetts economy that reached a gross state product of $649.1 billion in 2025, according to IBISWorld. Insurance remains a pillar of the state’s financial services industry, complementing its large life and annuities market.
Massachusetts’ steady growth rate of 3.5% annually since 2020 demonstrates the resilience of its insurance sector, even as carriers adjust to national challenges such as inflation, reinsurance pricing, and weather-related claims. Local carriers’ ability to retain significant market share alongside global competitors speaks to the unique dynamics of the Massachusetts market, where independent agency distribution and regional brand loyalty remain influential.
Top 10 Massachusetts P&C Insurers in 2025 – Total All Lines (NAIC)
| Rank | Company | Market Share | Direct Premiums Written (000) | Direct Premiums Earned (000) | Loss Ratio |
|---|---|---|---|---|---|
| 1 | MAPFRE Insurance Group | 8.56% | $1,977,175,000 | $1,929,986,000 | 54.66% |
| 2 | Travelers Group | 6.03% | $1,392,038,000 | $1,339,491,000 | 45.12% |
| 3 | Berkshire Hathaway Group | 5.97% | $1,378,286,000 | $1,416,986,000 | 52.91% |
| 4 | Liberty Mutual Group | 5.70% | $1,315,014,000 | $1,355,648,000 | 43.52% |
| 5 | Safety Insurance Group | 4.90% | $1,130,254,000 | $1,038,617,000 | 63.74% |
| 6 | Chubb Ltd. Group | 4.55% | $1,051,177,000 | $1,046,708,000 | 41.37% |
| 7 | Arbella Insurance Group | 4.54% | $1,048,240,000 | $1,012,007,000 | 48.88% |
| 8 | Progressive Group | 4.26% | $983,512,000 | $889,076,000 | 57.07% |
| 9 | Plymouth Rock Insurance | 3.70% | $854,121,000 | $778,670,000 | 58.77% |
| 10 | The Hanover Insurance Grp | 2.31% | $532,980,000 | $529,542,000 | 43.49% |
