A Refreshed, Quarterly-Sourced Table
Commercial P&C rates move every quarter, and CIAB publishes new survey data on a quarterly cadence. Unlike a static market-size figure, the rate-by-line data below is a moving target on purpose, and this page is maintained to reflect CIAB's most recent published quarter rather than a single point-in-time snapshot. Where a figure below is from an earlier quarter than CIAB's current release, treat it as the most recent one this page has been checked against.
The Numbers
Commercial P&C net premiums written reached $918.6 billion in 2024, up 7.1% year over year.
Insurance agencies and brokers employed 996,100 people in 2024, or 1,381,700 including related activities.
Big I's independent-agent network represents roughly 25,000 independent agency locations nationwide.
Independent agents capture approximately 80% of the commercial lines market, with personal lines skewing more toward captive and direct writers (secondary source, directional, not independently re-verified against the original citation).
The average independent agent represents 13 P&C carriers and 6 life or health carriers on a regular basis.
Wikipedia, citing the National Alliance for Insurance Education and Research
CIAB's Q2 2025 survey put overall commercial rate increases at 3.7%, down from 4.2% in Q1, the 31st consecutive quarter of increases; large-account rate increases fell to 2.9%, a 45% drop from Q1.
Umbrella and excess liability rates rose 11.5% in Q2 2025, driven by 135 nuclear verdicts in 2024, up 52% year over year.
D&O rates fell for the sixth consecutive quarter, down 2.5% in Q2 2025, amid more than $1 billion in excess capacity.
Commercial property rate increases moderated to 1.9% in Q2 2025, down roughly 70% from Q4 2024's 6.0% increase.
CIAB's Q3 2025 resource headline states soft market conditions are "clear" across the survey.
Sources
The external data in this article draws on the sources below. Figures described in the text as estimates or industry triangulations are directional and are not attributed to a single dataset.
- Insurance Information Institute
- Independent Insurance Agents and Brokers of America (Big I)
- Wikipedia, independent insurance agent
- CIAB, Q2 2025 P&C Market Survey
- CIAB, Q3 2025 resource