Howden revealed that January 1 casualty reinsurance renewals benefited from improving supply and demand dynamics, with performance-driven results driven by continued long-tail and reserve pressures, while international placements remained generally stable despite tighter renewal requirements for the U.S. business.
The U.S. casualty reinsurance market experienced largely stable conditions on January 1, with overall capacity stable and no significant changes in the number of active reinsurers, although the liability loss environment remained impacted by social inflation, according to the company’s latest update report.
Meanwhile, the trend toward increased syndication reportedly continues, which Howerton explained reflects typical line size constraints and a large number of markets competing for program share.
Regarding the expansion of the U.S. casualty reinsurance market, the company’s report continues: “Another important factor in the renewal process is the expanding role of casualty ILS and sidecars, which many cedants are now actively pursuing, particularly those that can offer large, stable portfolios that attract investors.
“In addition to increasing supply, these instruments remove some premiums from the open market, thereby reducing the amount of ceding that would traditionally need to be placed. While this has not yet had a meaningful impact on the traditional casualty reinsurance market, the continuation of this trend may begin to impact supply and demand dynamics over time.”
Elsewhere, Howden reported that reinsurers are looking to increase allocations to the U.S. casualty market at renewal as real estate rates fall and catastrophe premiums contract.
Howden observes that clients continue to show strong interest in full-account transactions that combine property and casualty insurance, seeking more efficient transaction structures.
Most treaties are up for renewal when they expire on January 1, 2026, and cedants with reliable data and good track records are said to have successfully negotiated for higher ceding commissions, with some increasing by 0.5-1 percentage point.
Instead, accounts affected by the losses faced commission pressure and reduced share as reinsurers tried to offset the increase in claims.
Howden noted that damage developments from 2014-19 and accidents in recent years had significantly impacted negotiations for 2026.
Ongoing reserve issues and adverse trends are expected to result in continued casualty rate growth of 8-9%. Despite rising costs, demand for protection remains strong, leaving the U.S. casualty market in a strong position.
Turning to the international casualty market, Howden said the segment had experienced modest weakness at renewal on January 1, with prices generally lower due to increased capacity and a generally stable loss environment.
“Projects with U.S. exposure face more challenging renewals, with outcomes sensitive to fluctuations in losses associated with nuclear rulings. Projects showing signs of worsening losses typically result in higher pricing,” the company said.
Howden continued: “Buyers in the London market are benefiting from strong supply, with existing players looking to deploy unused capacity in the property market to meet wider growth objectives. There has also been increased participation from several reinsurers in the US and Bermuda.”
“This reflects another year of strong performance, with results still benefiting from claims reductions post-Decile 10 and subsequent hard markets. Deterioration in the experience account was tempered by limited claims activity, although claims inflation and lower interest rates were starting to drive modest deterioration.
“As underlying account dynamics remained broadly stable, reinsurer performance continued to be profitable and capacity was adequate, the London Casualty Excess Loss Program fell by 5-10% on a risk-adjusted basis at renewal on January 1, 2026.”
