Claims
Commercial Auto Liability Costs Rising at More Than Double the Rate of Economic Inflation
By Insurance Wire Staff, . Insurance Wire.
Commercial auto liability insurers are paying out claims at a rate that has consistently outrun general price increases for a decade, according to a special report from AM Best, also covered by Insurance Journal and Reinsurance News.
What the numbers show
Between 2014 and 2024, general economic inflation averaged 2.8% per year. Over that same period, loss payments made in the first 12 months of commercial auto liability claims trended upward at 6.4% annually. That gap, more than two percentage points every year for ten years, points to something beyond ordinary price increases at work.
The driver, AM Best argues, is social inflation: the tendency of claim costs to rise faster than the broader economy because of shifts in how courts and juries treat liability. Larger verdicts, more frequent lawsuits, and courts interpreting liability more broadly all push costs higher even when the underlying accident rate holds steady. After adjusting for settlement rates, claim frequency in commercial auto has also risen over the past decade, which widens the gap between what has already been paid and what carriers still expect to pay.
Longer-open claims compound the problem. A claim that stays active for years is exposed to shifting jury precedents, and it typically generates higher claim adjustment expenses along the way.
The spillover into umbrella coverage
Commercial auto liability policies generally cap out at $1 million per claim. When a loss exceeds that limit, the remainder falls to an umbrella policy, which sits above the primary coverage and picks up what the underlying policy cannot.
Through 2018, umbrella pricing moved in line with general liability pricing. That relationship broke down as social inflation pushed commercial auto claims past their policy limits and into umbrella territory. David Blades, associate director at AM Best, described the shift directly: "As social inflation began to impact commercial auto claims, and those claims spilled into the umbrella coverage, umbrella pricing diverged from general liability, becoming more costly."
Umbrella pricing has not returned to its pre-divergence relationship with general liability, according to the report. For businesses that carry both commercial auto and umbrella coverage, that means sustained cost pressure on two lines at once.
What tort reform has done so far
The report points to Florida as a case where legislative action has made a measurable difference. Sweeping tort reforms in the state have helped offset excessive litigation costs, and average paid claim severity there has trended downward as a result. Whether other states follow Florida's path is an open question the report does not answer, but the Florida data suggests reform can move the needle.
The US Bureau of Labor Statistics reported that motor vehicle insurance prices were down 5.0% year on year as of September 2026, which may reflect some easing in personal auto. Whether that trend extends to commercial lines, where social inflation pressures are more acute, is not established by that figure alone.
What to watch
For carriers writing commercial auto and umbrella, the practical question is whether current reserves adequately reflect a decade of claim cost growth that has consistently outpaced economic inflation. The AM Best findings suggest that underwriters and actuaries pricing these lines need to treat social inflation as a structural feature of the environment, not a temporary spike. Tort reform activity in other states, and any shift in jury behavior, are the variables most likely to change the trajectory.
Sources
1. AM Best: Social Inflation Drives Surge in Commercial Auto Liability Claims, insurancejournal.com
2. Best's Special Report: Social Inflation Adds Pressure to US Property/Casualty Liability Results, news.ambest.com
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