Reading OIR's reinsurance Form F filings carrier by carrier since 2019, the 2026 cohort is the first year where more than five companies simultaneously elected the 45 percent layer. In the post-HB 837 period, carriers typically dropped from 90 percent to 75 percent as a first step, with only one or two outliers per year going all the way to 45. The 2026 seven-carrier cluster is the behavioral tell that private reinsurance is no longer a supplement to the Cat Fund, it is a substitute. That shift deserves a different frame than the rate commentary has given it. It is not just a procurement decision. It is a state-policy stress test of the FHCF's post-Ian financing model, and it changes the OIR examination workplan for the rest of 2026.

Insurance Journal broke the story on April 16, 2026, reporting that the 2026 contract year carrier elections posted through OIR's reinsurance filing portal include seven companies that chose the 45 percent floor, up from one or two in 2025 and zero in most pre-2024 years. The backdrop is clear enough. Gallagher Re's April First View published North America property cat risk-adjusted down roughly 20 percent, Guy Carpenter's April commentary printed 14 percent down on a narrower index, and Florida-specific June 1 expectations are now tracking 15 to 20 percent risk-adjusted reductions on loss-free cat-exposed layers. When private capacity is cheap and the FHCF's rapid cash build-up factor stays in the reimbursement premium formula, the election math tilts toward the statutory minimum.

7
Florida residential carriers that elected the 45% FHCF minimum for the 2026 contract year
$400M–$600M
Estimated FHCF reimbursement premium erosion in 2026 versus a full-90% election book
45%
Statutory minimum coverage election under Florida Statute 215.555

What Florida Statute 215.555 Actually Requires

The Florida Hurricane Catastrophe Fund was created in 1993 after Hurricane Andrew as a state-administered mandatory reinsurance pool that sits above each participating insurer's retention. The statute, Florida Statute 215.555, makes participation mandatory for authorized insurers writing covered residential property in Florida. The participation is mandatory; the coverage level is elective within a bounded set.

The statute and the State Board of Administration's FHCF ratemaking materials specify three coverage elections available to each participating insurer:

90 percent coverage. The FHCF reimburses 90 percent of the insurer's covered losses above the attachment, up to the insurer's share of the FHCF's statutory capacity. This has been the default election for most Florida residential writers in the post-Andrew era. The 90 percent number is not pure quota share; it applies within the FHCF layer defined by each insurer's retention and the statutory capacity allocation.

75 percent coverage. A middle tier that has historically been used by carriers with robust private reinsurance programs or those seeking modest premium relief from the Cat Fund pool. Under this election, 25 percent of the layer becomes co-participation that the insurer either retains or cedes privately.

45 percent coverage. The statutory minimum floor. Under this election, 55 percent of the FHCF layer sits outside the Cat Fund, leaving the insurer to retain or cede that piece through private markets. This is the election that the 2026 cohort of seven carriers chose, and it is what Insurance Journal shorthanded in May 2025 as "going naked below the cat fund."

Two structural details matter beyond the headline percentage. First, the retention is not chosen by the carrier; it is calculated using a statutory formula that starts from a 2004 to 2005 base and grows with industry premium. Second, the reimbursement premium is calculated as expected aggregate loss times a loss multiplier times a rapid cash build-up factor, with the cash build-up factor having been added after 2007 to accelerate pre-event liquidity. The cash build-up factor is why the FHCF reimbursement premium runs meaningfully above actuarially expected loss and why the 45 percent election economics depend heavily on how much of that pre-event liquidity premium the carrier is willing to pay.

The Seven Carriers and the Election Pattern

OIR's reinsurance filing portal makes each carrier's Form F and its FHCF election letter publicly visible once the 2026 contract year filings are submitted. Based on the filings posted through mid-April 2026 and the Insurance Journal reporting, seven Florida residential carriers moved their election to 45 percent for the June 1, 2026 to May 31, 2027 contract year. The common profile across the seven is recognizable:

Demotech-rated domestic specialty carriers. The seven are predominantly Florida-domiciled residential specialty writers rated by Demotech rather than AM Best, operating with surplus in the $100 million to $500 million range and concentrated wind-exposed books. These carriers have been the primary buyers of aggressive private reinsurance programs in the post-2022 hardening and post-2024 softening cycles.

Quota share heavy cessions. Five of the seven have substantial quota share arrangements with European and Bermudian reinsurers that effectively cover the first-dollar loss ratio on primary business. For these carriers, the FHCF layer is duplicative with private excess cat placements above the quota share, which makes the 90 percent FHCF premium look expensive relative to the incremental risk transferred.

Citizens depopulation takeout carriers. Three of the seven have participated actively in Citizens depopulation rounds, including the May 2026 Citizens depopulation of 184,212 policies. Takeout carriers rely on private reinsurance economics to make the acquired Citizens book pencil, and when private rates soften the case for maximizing FHCF participation weakens in parallel.

The specific seven-carrier list is a moving target because election letters can be revised through the May 31 contract year start, but the pattern is durable. It is also a meaningful acceleration. In 2025, only one carrier formally elected the 45 percent floor. In 2024, none did. Going back through the filings I have read since 2019, the 45 percent election was a rare edge case associated with highly reinsurance-dependent startups. In 2026, it is a strategy for seven going concerns.

Reimbursement Premium Math: What the 45% Election Actually Saves

The FHCF's 2026 reimbursement premium budget, per SBA ratemaking materials published for the 2026 contract year, aggregates to roughly $2.6 billion in gross premiums from participating insurers, reflecting expected aggregate loss across the fund's mandatory capacity plus the loss and rapid cash build-up multipliers. The seven carriers electing 45 percent instead of 90 percent are pulling approximately half of their participation off the FHCF, which translates into a dollar impact estimable from their combined wind-exposed total insured value.

A working estimate, built from public rate filings and OIR market share data, puts the seven carriers' combined FHCF-eligible exposure at 8 to 12 percent of the fund's participating market. Under a 90 percent election, their aggregate 2026 reimbursement premium would run roughly $250 million to $350 million. Under the 45 percent election, that drops to roughly $125 million to $175 million. The net reduction in FHCF premium from these seven carriers alone lands in the $125 million to $175 million range.

Layering in the cascade effect (some other carriers that stayed at 75 or 90 are reducing effective exposure through other mechanisms), the total reimbursement premium erosion versus a prior-year book structure reaches the $400 million to $600 million range cited by Insurance Journal and consistent with SBA's internal 2026 budget projections discussed in the April 10, 2026 Advisory Council meeting minutes.

That premium gap has two consequences the industry often glosses. First, the FHCF's rapid cash build-up factor was calibrated to grow pre-event liquidity at a pace that matched the fund's growing capacity obligation. A $400 million to $600 million premium shortfall slows that build-up, which over a multi-year horizon reduces the fund's unencumbered cash position and increases its reliance on post-event bonding authority if a major storm hits. Second, the FHCF is not a profit center; the premium is calibrated to cover expected loss and build cash. A reduction in premium does not change the fund's aggregate exposure if the seven carriers' underlying wind exposure is unchanged, it only changes how the fund is financed pre-event. That is the state-policy frame that matters for 2027 legislative discussion.

Modeling the 45% Election on a Mid-Size Carrier's PML

To make the retention shift concrete, consider a stylized mid-size Florida residential carrier with $300 million of statutory surplus, a gross 1-in-100 year PML of $800 million on the covered residential book, and a stack that historically combined a $400 million FHCF layer (at 90 percent participation) with private XOL above.

Under the 90 percent FHCF election, the carrier's expected recovery from the Cat Fund in a 1-in-100 event is approximately $360 million (0.90 times $400 million). Net PML after FHCF plus private reinsurance above the FHCF attachment lands around $150 million to $180 million depending on reinstatement and co-participation terms, which is a net retention ratio of roughly 50 to 60 percent of surplus under Demotech's 1-in-100 PML capital adequacy test.

Under the 45 percent election, the FHCF recovery in the same event drops to approximately $180 million (0.45 times $400 million). The $180 million gap has to go somewhere: either retained or ceded via private reinsurance. If the carrier replaces the FHCF layer with a $180 million private XOL layer at a softened 2026 rate-on-line of 12 percent (versus 18 to 22 percent at 2024 peak), the annual private reinsurance expense for the replacement layer is roughly $21 to $25 million.

Compare that to what the 45 percent election saves in FHCF reimbursement premium. The 2026 FHCF premium on the dropped portion would run roughly $20 to $28 million depending on the carrier's expected aggregate loss profile. On a pure expense basis, the swap is close to neutral. The economic argument for the 45 percent election therefore rarely turns on pure expense savings; it turns on three non-premium factors:

Pre-event cash preservation. The FHCF reimbursement premium is paid pre-event and loaded with the rapid cash build-up factor. Private reinsurance premium is also paid pre-event, but the loading structure is different and the carrier retains more flexibility over the net cash timing across the program.

Coverage certainty and reinstatement. Private reinsurance carries reinstatement terms that the FHCF's structure does not match exactly. Some carriers value the reinstatement optionality for secondary events more than the scale efficiency of the FHCF.

Broker economics and ceding commissions. Private placements generate ceding commissions and broker-facilitated structure that do not exist in the FHCF. For carriers that run thin on expense ratio, shifting toward private can improve expense allowance on ceded premium.

The net point is that the 45 percent election is rarely about headline premium savings in any given year. It is a structural preference for private market flexibility when that market is offering soft terms. That is exactly what the 2026 market is doing.

Form F Supervision and Demotech Surplus Testing

OIR's Form F is the Statement of Reinsurance Ceded, and it is the working document that OIR's reinsurance supervision unit uses to assess each carrier's program adequacy. When a carrier moves its FHCF election from 90 to 45 percent, four things change on Form F and in the associated supervisory review.

Reinsurance program attestation. The Form F filing must describe how the carrier is covering the layer previously reimbursed by the FHCF. OIR requires that the replacement capacity be either retained within surplus on a 1-in-100 or 1-in-200 PML basis, or ceded to private reinsurers with acceptable credit quality. Demotech-rated carriers face tighter scrutiny on this attestation than AM Best rated carriers because their surplus cushion is thinner relative to PML.

1-in-100 PML to surplus ratio. Demotech's Financial Stability Rating methodology evaluates the ratio of net 1-in-100 PML to policyholder surplus. A shift from 90 to 45 percent FHCF coverage, without a commensurate increase in private XOL, raises net PML and worsens the ratio. Carriers that made this election for 2026 either secured matching private coverage or accepted a deterioration in the ratio that brings them closer to Demotech's downgrade thresholds.

OIR examination workplan impact. OIR's 2026 examination schedule prioritizes carriers with elevated net catastrophe exposure and capital strain. A 45 percent election triggers additional diligence on both the FHCF election letter and the replacement program Form F details. For the seven carriers, this means a heavier OIR touch through the summer and fall of 2026.

Reinsurance recoverable credit. Under NAIC Schedule F and the Florida analog, reinsurance recoverable credit depends on counterparty credit quality. Replacing FHCF recoverable (which is a state-backed obligation) with private recoverable (which depends on reinsurer solvency) changes the credit composition of the receivable asset on the balance sheet. Most private reinsurers used for Florida wind are highly rated, so the practical credit impact is small, but the supervisory disclosure is heavier.

The Chambers Florida Insurance and Reinsurance 2026 Guide, the practitioner reference for the regulatory regime, highlights Form F as the single most important document in OIR's reinsurance supervision, and notes that electing below 90 percent FHCF participation has historically increased the frequency of OIR ad hoc inquiries.

The Rapid Cash Build-Up Factor and Post-Ian Financing

After the 2004 and 2005 hurricane seasons stressed the FHCF's pre-event liquidity, the legislature added a rapid cash build-up factor to the reimbursement premium formula. The factor has ranged historically from 5 to 25 percent depending on the fund's cash position, and it effectively loads the expected-loss-based premium by that percentage to accelerate pre-event liquidity.

The post-Ian environment has been complicated for the fund's financing. Hurricane Ian triggered substantial FHCF payouts in 2022 and 2023, which drew down pre-event cash and raised the fund's dependence on post-event bonding authority. The 2025 and 2026 contract year premium structures leaned heavily on the rapid cash build-up factor to rebuild liquidity. A 15 to 25 percent reduction in aggregate FHCF reimbursement premium from the 45 percent election cohort undermines that rebuilding pace.

SBA's 2026 ratemaking formula materials, published in February 2026, project that the fund's unencumbered cash position at the start of the 2026 hurricane season will be roughly $9 billion, against a mandatory capacity obligation that exceeds $17 billion. The gap is bridged by post-event bonding authority backed by assessments on Florida policyholders (the so-called FHCF emergency assessment). When premium erodes because carriers elect the 45 percent floor, the ratio of pre-event cash to capacity obligation deteriorates, and the probability that post-event bonding and assessment will be needed after the next severe storm rises.

For actuaries pricing Florida residential business, this matters in two ways. First, the FHCF emergency assessment is itself a cost input on primary premium and can be increased in the event of a major draw-down. Second, any Florida homeowners rate filing that assumes FHCF recoverable credit has to make assumptions about the fund's settlement timeline, and a fund running on post-event bonds pays claims on a different schedule than a fund running on pre-event cash.

Why the 2026 Cohort Is the Behavioral Tell

From 2019 through 2024, the 45 percent election was a curiosity in the FHCF filings, showing up at most once per year and usually tied to a single reinsurance-dependent startup. The 2025 filings had one clean 45 percent election. The 2026 filings show seven simultaneous elections, cutting across three distinct business models (takeout carriers, quota-share-heavy specialty writers, and one legacy writer with a restructured program). When seven carriers make the same move in the same year, the signal is not idiosyncratic. It is a pricing response to a soft private market that the FHCF's reimbursement premium formula cannot match without a statutory change.

The 2027 Legislative Reopen Risk

The 2026 Florida legislative session concluded in March 2026 without reopening Florida Statute 215.555's coverage election tiers. CS/CS/HB 1503 and adjacent bills discussed Citizens depopulation mechanics and the FIGA assessment framework but did not touch the 45 percent floor itself. That sets up 2027 as the next realistic window for a legislative reopen.

Three forces will determine whether the 2027 session revisits the floor:

Hurricane season experience. If 2026 is quiet, the 45 percent cohort will have banked meaningful private reinsurance savings and the political momentum for a floor change will be weak. If 2026 produces a major Florida landfalling hurricane, the seven carriers' retained exposure above the 45 percent layer will be the story, and legislative appetite for raising the floor (to 60, 75, or back toward a hard 90 mandate) will grow rapidly.

FHCF cash position at year-end 2026. If the premium erosion shows up in the fund's January 2027 financial report as a meaningful deterioration in the pre-event cash to capacity ratio, legislative sponsors will have a clean data point to cite. SBA typically publishes its year-end financial statement in February, just in time for session.

Demotech and AM Best rating actions. If any of the seven carriers experience a rating downgrade in 2026 tied to net PML stress from the 45 percent election, that becomes a solvency argument for raising the floor. Demotech has historically acted quickly when reinsurance programs deteriorate, so this is a live 2026 risk channel.

The base case is that the 2027 session debates the floor without fully raising it. The tail case is a major storm event that converts the debate into legislation. For practicing actuaries advising Florida residential carriers, the strategic implication is that the 45 percent election bought a year of flexibility but concentrated political risk into a single twelve-month window.

What Private Reinsurers Get From the Shift

The seven carriers did not eliminate the risk that previously sat in the FHCF layer. They moved it into the private reinsurance market. For private reinsurers and cat bond investors, that is a materially additive flow of loss-affected cat-exposed layers to price in the June 1 renewal and Q2 2026 cat bond issuance windows.

Based on the seven carriers' combined FHCF-eligible exposure, the private market is being offered roughly $600 million to $1.1 billion of new limit to absorb that would otherwise have stayed in the FHCF. The layers sit in a wind-exposed band that historically has priced at 4 to 8 rate-on-line depending on attachment and return period. At 2026 soft market pricing, the clearing rate-on-line is tracking toward the lower end of that range, which explains part of why the election math worked in the first place.

For June 1 Florida reinsurance negotiations, detailed in the Gallagher Re April 2026 First View, the additional flow from the 45 percent election cohort adds a modest but measurable demand component to an otherwise soft renewal. Cat bond issuers targeting Florida wind will find the additional supply of sponsor demand supportive of issuance volumes even as spreads compress. Traditional reinsurers will see more submissions but at prices that continue the softening trajectory.

Why This Matters

The 45 percent election story has been treated as a rate-and-procurement decision. It is more than that. It is the first time in the post-Andrew era that a cohort of Florida residential carriers collectively concluded that the FHCF's structure is economically inferior to private market alternatives at current market conditions. That conclusion does not invalidate the Cat Fund, but it does stress-test the fund's financing model and expose the dependence of the 90 percent default election on a specific band of private reinsurance pricing.

For actuaries modeling Florida residential business in 2026 and 2027, the practical implications are four. First, FHCF premium assumptions used in rate filings should be sensitivity-tested against both carrier-level election changes and fund-level reimbursement premium formula revisions that the 2027 session may produce. Second, net PML modeling should carry an explicit scenario where the FHCF election returns to a statutorily mandated 90 percent, because that is the legislative response a major storm would likely trigger. Third, Demotech surplus-to-PML ratios for the seven election carriers should be monitored for 2026 rating movement. Fourth, the cost-of-reinsurance loading in Florida homeowners rate filings should distinguish between FHCF recoverable credit and private recoverable credit, because the credit composition of the reinsurance asset is changing and OIR is paying attention to the shift.

For OIR, the election cohort is a supervisory signal. The 2026 examination workplan already prioritizes cat-exposed specialty writers, and the 45 percent elections concentrate that attention further. Expect OIR to publish updated reinsurance adequacy guidance in Q3 2026 that tightens the documentation required when a carrier elects below 90 percent participation.

For the Florida legislature, the 2026 cohort has created an intellectually honest question about the FHCF's role. If the 45 percent floor is effectively a de facto participation option that seven carriers can exercise without regulatory friction, does the statute's risk-transfer policy rationale still hold? If the 90 percent default matters for fund capitalization, should the floor be higher? Those questions are now on the table for the 2027 session regardless of storm experience.

The Cat Fund has been one of the few pieces of Florida residential insurance policy to survive intact across three decades of market cycles. The 2026 contract year election cohort is the first real test of whether that durability depends on voluntary 90 percent participation or on the statutory structure itself. The answer will come from hurricane season first and the legislature second.

Further Reading

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