S&P Global: Personal Lines Lead Growth; Underwriting Trends Mixed Across Segments
U.S. property and casualty insurers wrote more than $1.05 trillion in direct premiums in 2024, surpassing the trillion-dollar mark for the first time in industry history, according to S&P Global Market Intelligence’s analysis of statutory filings. The 8.0% year-over-year increase was driven primarily by strong gains in personal lines, especially private auto and homeowners’ insurance.
Personal Lines Propel Historic Premium Growth
Personal lines premiums totaled $534.92 billion, up from $477.04 billion in 2023. Private passenger auto posted the largest increase among all lines, rising 12.6% to $358.77 billion. Homeowners insurance premiums climbed 11.1% to $169.55 billion, while farmowners coverage contributed $6.60 billion.
Commercial lines also posted premium growth, though at a more moderate pace. Total commercial direct premiums written reached $502.35 billion, a 4.0% increase from the prior year. Key segments included liability ($162.70 billion), commercial property ($103.97 billion), commercial auto ($70.94 billion), and workers’ compensation ($55.42 billion). Workers’ compensation was the only major line to contract, with premiums falling 5.3% year over year.
A notable change in 2024 was the introduction of pet insurance as a stand-alone reporting line. Previously categorized under inland marine, the shift reflects both increased volume and growing interest in the product from carriers and distributors.
Underwriting Margins Rebound in Personal Lines
The industry’s overall underwriting performance improved in 2024, supported by a notable recovery in personal lines. The aggregate direct incurred loss ratio fell to 61.9%, down from 65.4% in 2023. Personal lines saw a 9.3-point improvement, ending the year at a loss ratio of 64.6%.
Private auto, which had been under profitability pressure in recent years, reported a direct incurred loss ratio of 66.1%, down from 75.4% the year before. Homeowners improved to 61.5%, from 70.6% in 2023.
By contrast, commercial lines posted a higher loss ratio of 58.8%, up 1.9 points from the prior year. The most significant deterioration occurred in the “other liability” segment, which includes general liability, excess and umbrella, cyber, and errors and omissions. That line posted a loss ratio of 70.8%, up from 63.0% in 2023.
Workers’ compensation also saw a modest increase in its loss ratio, rising to 46.8% from 45.0%. Commercial auto loss experience was mixed: overall, the segment improved to a 72.9% loss ratio, but the liability portion worsened slightly to 77.4%, while physical damage results improved by 7.4 points to 57.8%.
Strategic Outlook for Agents and Carriers
The record-setting premium volume reflects the combined impact of sustained rate activity, inflation-driven exposure growth, and increased demand for coverage across both personal and commercial lines. For carriers, the recovery in personal auto and homeowners profitability offers some relief following several difficult underwriting years, though frequency and severity trends remain key variables.
In commercial lines, opportunities remain in transportation, property, and select liability niches, but deteriorating loss trends in certain sectors may prompt underwriting recalibration. The emergence of pet insurance as a separate reporting line underscores evolving consumer demand and opens the door for specialization and product development by agencies, MGAs, and carriers alike.
S&P Global’s full dataset provides detailed roll-ups of every reported line of business, along with templates to analyze multi-year market share trends across the industry.
