Inland Marine's Loss Ratio Hits an Eleven-Year Low as Top Writers Cede Share

Inland marine's loss and loss-adjustment-expense ratio hit an eleven-year low in 2025, extending a run in which the line has beaten the broader property/casualty industry by more than 20 percentage points annually for four consecutive years (AM Best, August 18, 2026). One day later, Banyan Risk launched a new U.S. inland marine and marine property line backed by Accredited (The Insurer, August 19, 2026). That sequence, a record profitability print followed within 24 hours by a fresh capacity entrant, is the softening mechanism in miniature.

A Peak-of-Cycle Print, Not a Baseline

"As good as inland marine's underwriting performance has been historically, it was even better in 2025, when the line's loss and LAE ratio reached an eleven-year low," said Christopher Graham, senior industry analyst at AM Best (AM Best, "Inland Marine Profitability Remains a Hallmark as the Risk Landscape Evolves," August 18, 2026). Line results have moved a long way to get there. Inland marine posted its worst loss ratio in 12 years in 2020 as event-cancellation and cargo-damage claims spiked with the pandemic, then rebounded 15 percentage points to 49.5% in 2021 on a 15% premium jump as travel and cargo restrictions lifted (AM Best via Reinsurance News, 2022). By the first nine months of 2024, including pet insurance, the ratio had settled into a 44% to 49% post-pandemic range (AM Best via The Insurer, January 2025). Against that trajectory, an eleven-year low is not a new equilibrium; it is the trough of a cycle that has been running favorable since 2022, and treating it as the anchor for an indication risks pricing to a mean that has not existed in this line for four straight accident years.

The distinction matters for how the on-level and trend work gets used rather than re-derived. An experience period built entirely from 2022 through 2025 accident years carries no observations from the 44-to-49% range, let alone the 2020 spike, so a loss-ratio indication drawn straight from that window understates the line's own historical dispersion. AM Best's own framing treats the four-year gap over the broader P&C industry as the headline, not a single-year snapshot, which is itself a tell that even the rating agency reads this as a cyclical run rather than a structural repricing of inland marine risk.

Where the Capacity Is Actually Coming From

AM Best's report is explicit that the top writers hold less market share now than five years ago, with only a small uptick in top-10 concentration in 2024 that the agency attributes to pet insurance being reclassified into its own line rather than any real gain by incumbents (AM Best, August 18, 2026). Banyan Risk's launch gives that erosion a name and a date: the MGA is targeting construction and infrastructure, logistics and transit, and mobile property and specialty floaters, the same commercial exposures that make up 80% of the inland marine book, with Accredited's paper behind it (The Insurer, August 19, 2026). Intact Insurance Specialty Solutions has moved in the same direction from the incumbent side, rolling out a builders risk quota share with $100 million of capacity per project, admitted in more than 40 states, on top of an existing $300 million single-project facility.

Two things are true about that capacity at once. New entrants underwriting to eleven-year-low industry results have every incentive to shave rate to win the business, and incumbents expanding their own per-project limits are competing on capacity terms rather than price. Direct premium written for the line grew 6.9% in 2023 and now runs more than double its level of a decade earlier (AM Best, January 2025), so the exposure base has been expanding into a market that more writers are chasing at the same time loss experience looks best. That combination, rising limits offered plus fresh entrants plus a favorable loss print, is what a softening cycle looks like before the rate index shows it.

One Composite Ratio, Several Divergent Books

AM Best's headline number is a blend across goods in transit, builders risk, contractors equipment, fine arts and jewelry, and high-value medical and technology equipment floaters, exposures with almost nothing in common on frequency, severity, or claim tail. A composite loss ratio at an eleven-year low says the blend performed well; it says nothing about whether every sub-class inside it is priced adequately, and a book concentrated in one weaker sub-class can hide behind strong results in another. AM Best notes that net combined ratio results have shown even less variance than the direct loss ratio, which is the more dangerous number for a pricing committee to lean on: a flat combined ratio across several accident years reads as structural stability, and it can mask a sub-class mix shift, expense-ratio drift, or reinsurance cession change that is doing the smoothing rather than genuine rate adequacy. A single blended indication built off the composite, without a sub-class split, will misprice whichever piece of the book is weakest.

Values Inflation Is Outrunning Rate on Value

Builders risk and contractors equipment floaters are typically priced on rate applied to a declared or scheduled value, which only holds up if the value base keeps pace with replacement cost. It has not. Effective tariff rates on construction goods reached 25% to 30% in early 2026, a 40-year high, with steel and aluminum tariffs of 50% imposed in June 2025 and a 35.2% duty on Canadian softwood lumber; year over year through January 2026, aluminum mill shapes ran 33% higher, steel mill products 20.7% higher, and copper and brass mill shapes 15.7% higher (Grit Insurance, citing Associated General Contractors of America chief economist Ken Simonson, April 2026). On a $10 million project, an 8% to 15% material-cost increase translates into an $800,000 to $1.5 million coverage gap if the stated value was not updated (Grit Insurance, April 2026). A flat rate-on-value applied to a stale schedule looks like adequate pricing right up until a total loss reveals the gap, and a book with values pinned to pre-2025 appraisals is carrying more coinsurance exposure than its loss ratio suggests.

Catastrophe Risk Has Moved Onto Assets That Do Not Stay Put

Inland marine has historically been underwritten with limited weight on catastrophe modeling, on the reasoning that the covered property is mobile rather than fixed to a cat-exposed location. That reasoning is aging poorly. Twenty-one of the 23 billion-dollar weather disasters the U.S. recorded in 2025 were severe convective storms, and severe storms have accounted for roughly two-thirds of all billion-dollar weather disasters since 2020 (Insurance Journal, August 13, 2026). Scott Chamoff, senior director of Nationwide's national inland marine practice, put the exposure directly: "storm preparedness discussions focus almost exclusively on the permanent structure," which "only address part of the exposure," since contractors equipment, materials in transit, and builders risk property staged on-site are "often more vulnerable than the completed structure itself" (Insurance Journal, August 13, 2026). A construction site with equipment and staged materials sitting exposed during a hail or wind event carries a correlated loss that a standard inland marine rating plan, built around per-risk frequency and severity rather than event aggregation, does not naturally capture. As builders risk and contractors equipment premium grows alongside project values, the un-modeled tail sitting inside an otherwise low-cat line grows with it.

A Cooling Construction Cycle Removes Exposure Growth Mid-Softening

Builders risk and contractors equipment premium tracks construction activity directly, and that activity is decelerating. The Dodge Momentum Index fell 6.3% in January 2026 and slipped a further 1.9% in June to 271.7, with commercial planning down 6.8% even as institutional planning grew (Dodge Construction Network, June 2026). U.S. construction spending has eased slightly since its 2024 peak, which AM Best itself flags as a driver of the tighter competition for the exposure that remains (AM Best, August 18, 2026). The timing compounds the pricing problem rather than offsetting it: a shrinking pool of new construction starts, chased by more writers underwriting to record-favorable loss ratios, is a textbook setup for rate erosion to outpace exposure growth, which is a different failure mode than a shrinking book simply generating less premium.

What the Desk Should Do Before the Next Renewal Cycle

The near-term work is sub-class, not portfolio-level. Builders risk and contractors equipment indications need their declared-value bases re-tested against current material cost indices rather than last renewal's appraisal, particularly on any project scheduled before the 2025 tariff increases took hold. Cargo, fine arts, and high-value equipment floaters need their own loss-ratio trend read separately from the builders risk and contractors equipment lines that are absorbing both the values-inflation and the catastrophe-aggregation pressure described above; a single blended trend factor applied across the whole inland marine book will systematically underprice the sub-classes carrying the newer risk and overprice the ones that are not. And any renewal quote that undercuts an incumbent's price on the strength of the industry-wide loss ratio deserves a direct question back to the broker: is that price built on this book's own experience, or on the AM Best composite that a new entrant with no claims history of its own has every reason to cite.

The next data points land on a predictable schedule. AM Best typically follows a January pet-insurance-focused inland marine update with mid-year commercial lines outlook revisions, and third-quarter 2026 statutory filings, due in the fall, will show whether the top writers AM Best flagged as losing share have started defending rate or are still ceding it. A twelfth straight quarter of favorable inland marine results reported alongside continued share loss to entrants like Banyan Risk would confirm the softening is accelerating rather than stabilizing, and that is the print worth watching before the next round of builders risk and contractors equipment renewals is quoted.