Property catastrophe rate-on-line fell up to 25% on a weighted average basis at the June 1, 2026 renewal, Howden Re reports, after 14.7% at January 1 and 16% at April 1. Guy Carpenter puts Florida-specific risk-adjusted declines at 15% to 20% with more than 12% additional capacity placed. Each renewal this year has cut deeper than the one before it, with no loss event between them to explain the change.

Key Takeaways

  • 1.6 times demand is the capacity-to-demand ratio Howden Re recorded at June 1, meaning $1.60 of capital chasing every dollar of protection bought.
  • $785 billion of global reinsurer capital, an Aon record, with traditional capital up more than 8% or $49 billion to $649 billion and ILS capital at $136 billion, up 18%.
  • $100 billion of insured natural catastrophe losses has been exceeded in each of the past four years, 2025 at $121 billion, so this is not a market repricing improved loss experience.
  • 19% below the 2024 peak and 38% above the 2017 trough is where the Guy Carpenter global index sits, which places the cycle rather than the quarter.

The Pace Is Increasing, Not Settling

Renewal Date Property Cat ROL Change (Howden Re) US Property Cat Change (Guy Carpenter) Context
January 1, 2026 -14.7% -12% Largest decline since 2014; retrocession down 16.5%
April 1, 2026 -16% -14% Japan double-digit cuts; Gallagher Re logged North America at -20%
June 1, 2026 Up to -25% (weighted avg) -15% to -20% (Florida layers) Steepest pace since 2014; capacity ratio at 1.6x

The two brokers' figures are not directly comparable. Howden Re publishes a proprietary risk-adjusted index on a global weighted-average basis; Guy Carpenter's US Property Catastrophe Rate-On-Line Index uses a brokered excess-of-loss methodology maintained since 1990. Both point the same way, and both show acceleration rather than stabilisation.

Florida dominates June 1 because most Florida-domiciled carriers place ahead of a hurricane season that starts the same day. The financial backdrop there is genuinely strong: Florida domestic underwriters posted a 76.8% combined ratio in 2025, policyholders' surplus rose 45% at year end, and litigation fell roughly 66% from peak after the December 2022 tort reform. More than 1.4 million policies have moved out of Citizens since 2022 and 14 new companies launched during the depopulation.

Cat bonds are now competing directly at the top of Florida towers. Guy Carpenter counted $3.2 billion of Florida coverage from 12 sponsors year to date, including three first-time issuers, and Mangrove's $111 million deal could reportedly have been three times larger at pricing that beat the softening traditional market.

The Cat Load Falls by More Than the Rate Does

Supply explains the acceleration, and it is arriving from three pools at once. Traditional reinsurer capital reached a record $649 billion after two strong underwriting years, with the four large European reinsurers averaging 19.6% ROE in 2025. ILS capital hit $136 billion and the outstanding cat bond market ended Q1 2026 at $63.9 billion. Retrocession, which sets reinsurers' own cost of capacity, fell 16.5% at January 1, deeper than the direct market, letting reinsurers write more gross at lower net cost.

At 1.6 times demand, sellers compete on structure as well as price, and the structural concessions are where the economics compound. Programmes truncated during the hard market are being rebuilt to full height. Named-peril placements are returning to cascading all-perils cover, which removes the basis risk of a loss falling outside a peril definition. Second and third event protections, prepaid reinstatements and top-and-drop features are all back on offer, and quota share markets are adding occurrence and aggregate limits alongside better ceding commissions.

That matters for a rate filing more than the headline does. The catastrophe load is a function of modelled average annual loss, the cost of the programme covering it, and the retention and cession structure. A 15% to 20% rate cut on a programme that also drops its attachment point, restores a reinstated layer and adds aggregate cover reduces total cost of risk by more than 15% to 20%, because the retained portion shrinks at the same time the ceded portion gets cheaper. Aggregate protections additionally cut the variance of retained catastrophe loss, which is the input a risk margin is set from.

Florida's regulator will expect that arithmetic to appear. The Office of Insurance Regulation has historically required reinsurance cost changes to be reflected in filings, and a carrier that buys 15% to 20% cheaper while holding its catastrophe provision flat is filing a number its own placement contradicts. With 14 new entrants competing for the depopulated book, the carriers that move first on price take the share, and the ones that hold rates take the adverse selection.

Economics Reassert Before Losses Do

Howden Re's own report is the argument against reading any of this as a market correcting itself. Global insured catastrophe losses have exceeded $100 billion in each of the past four years, 2025 at $121 billion. Inflation is rising again, US casualty reserve adequacy is actively disputed, and AI-driven cyber exposure is scaling into programmes that carry cyber as a covered peril. David Flandro of Howden Re put it as capital having rarely been more abundant in an environment of elevated risk exposure.

The number that matters is economic value added, return on invested capital less weighted average cost of capital, and it is contracting visibly through 2026. Howden Re's analysis is that a further decline of the magnitude seen at June 1 would put large segments of industry returns below their cost of capital by 2027. That is the constraint. It arrives before any hurricane does, and it arrives at a level the ROL index will still describe as 38% above the last trough.

Discipline from the largest carriers is not sufficient on its own at this capacity ratio. Swiss Re's Andreas Berger said ahead of the renewals that the firm should not be expected to write higher volumes, and it wrote $4.5 billion of treaty business at June and July, down 5.9% on casualty pruning while growing natural catastrophe, property and specialty 3%. Munich Re cut its April book 18.5% and walked away from roughly EUR 2 billion it judged underpriced.

The capacity ratio held at 1.6 anyway. What the two largest reinsurers decline to write, ILS capital takes, and it takes it against a different hurdle: a cat bond investor prices the risk against corporate credit spreads and treasury yields rather than against a reinsurer's portfolio return and reserve requirements. Sixty percent of institutional investors intend to increase ILS allocations, and $13.8 billion of maturing bonds needs redeploying. Discipline exercised by one pool of capital does not bind a second pool that answers to a different benchmark.

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