From monitoring NAIC task force restructurings since the Climate Risk Disclosure Working Group first formed, this consolidation into a single Natural Catastrophe Risk and Resilience Task Force signals a shift from studying protection gaps to actively building the regulatory framework to close them. The Executive Committee elevated catastrophe risk coordination to a top-level priority at the Spring 2026 National Meeting in San Diego, and the Flood Insurance Blueprint is the most ambitious deliverable on its 2026 charge sheet.

The concept is straightforward: expand private flood insurance options and close the protection gap where the National Flood Insurance Program falls short. The execution is anything but. Private flood insurance wrote $730 million in net premiums in 2024 (Insurance Information Institute, citing S&P Global Market Intelligence), representing roughly 13% to 15% of the total flood insurance premium base. Scaling that share requires solving three actuarial problems simultaneously: NFIP rate subsidies that distort competition, adverse selection dynamics that concentrate high-risk policies in the federal program, and inland flood models whose confidence intervals remain two to four times wider than coastal surge models.

This article maps the structural barriers the Blueprint must address and the actuarial mechanics behind each one.

$730M
Private Flood Net Written Premium, 2024
~4.7M
NFIP Policies in Force
83.1
Private Flood Combined Ratio, 2024

The NAIC Restructuring: From Study to Unified Action

The NAIC merged three previously separate bodies at its March 22-25 Spring 2026 National Meeting: the Climate and Resiliency Task Force, the Catastrophe Insurance Working Group, and the FEMA Working Group. The resulting Natural Catastrophe Risk and Resilience Task Force sits directly under the Executive Committee, signaling that catastrophe risk regulation has moved from committee-level discussion to executive-level priority.

The new Task Force carries five formal charges for 2026. It will implement deliverables from the NAIC National Climate Resilience Strategy adopted in March 2024, coordinate all catastrophe risk and resilience discussions across NAIC committees, assess financial regulatory strategies addressing natural catastrophe risk, coordinate communications on solvency strategies and mitigation programs, and act as catalyst for the Center of Excellence on Catastrophe Modeling and Risk Management (CAT COE).

Two new working groups report to the Task Force. The Severe Peril Working Group covers protection gaps across hurricanes, wildfires, atmospheric rivers, severe convective storms, hail, landslides, and flooding. Its Charge #4 calls for launching a national awareness campaign incorporating scientific research, technology, and mitigation strategies with available flood insurance options. This is the operational mandate behind the Flood Insurance Blueprint. The Pre-Disaster Mitigation and Risk Modeling Working Group focuses on catastrophe model risk assessment, resilience tools for state regulators, and interagency coordination with State Emergency Management Agencies and FEMA’s Building Resilient Infrastructure and Communities (BRIC) program.

The consolidation matters for actuaries because it creates a single regulatory point of contact. Previously, flood-related regulatory discussions were scattered across at least three NAIC bodies, each with different charge sheets and reporting structures. A unified Task Force can push a consistent framework across rate regulation, solvency monitoring, and consumer protection without the coordination delays that slowed prior efforts.

What the Flood Insurance Blueprint Must Deliver

The Blueprint has three stated objectives: raise awareness of flood risk, expand private flood insurance options, and close the protection gap where NFIP coverage falls short. Each objective maps to a distinct actuarial challenge.

Raising awareness addresses a participation problem. Only about 30% to 35% of properties in FEMA Special Flood Hazard Areas carry flood insurance, according to widely cited FEMA data. Outside SFHAs, where approximately 25% to 30% of flood claims originate, take-up rates fall to single digits. An Insurance Research Council consumer survey from 2023 found that 22% of homeowners consider themselves at flood risk, and of those, 78% had purchased flood insurance (43% through the NFIP and 35% from private insurers). That leaves roughly one in five self-identified at-risk homeowners with no flood coverage at all, and the denominator itself is almost certainly too small since most homeowners underestimate their actual flood exposure.

Expanding private options requires addressing why private flood has stalled. After explosive growth from $524 million in net written premium in 2021 to $803 million in 2023 (a 53% increase over two years), private flood premiums actually declined 9.1% to $730 million in 2024. The combined ratio deteriorated from a remarkably profitable 33.9 in 2023 to 83.1 in 2024, a 49.2-point swing driven partly by Hurricane Helene and other catastrophe activity. The growth trajectory broke precisely when claims started testing the book.

Closing the protection gap means reaching properties and communities where neither the NFIP nor private carriers currently provide affordable coverage. CoreLogic data cited by the Insurance Information Institute identifies 6.6 million homes at moderate or greater storm surge risk, representing $2.19 trillion in reconstruction cost value. The inland flood exposure, which includes riverine flooding, pluvial events, and drainage failures, extends well beyond coastal zones into communities with little historical flood insurance penetration.

The NFIP’s Structural Grip on the Market

The National Flood Insurance Program dominates the U.S. flood insurance market with approximately 4.7 million policies and roughly $1.3 trillion in coverage in force. It also carries approximately $20.5 billion in debt to the U.S. Treasury as of December 2020 (after Congress cancelled $16 billion in October 2017), making it one of the largest unfunded federal contingent liabilities outside entitlement programs.

FEMA’s Risk Rating 2.0, which launched in two phases in October 2021 and April 2022, represents the most significant actuarial reform in the program’s history. The legacy rating system used zone-based maps that often lagged decades behind actual risk. Risk Rating 2.0 introduced property-level pricing using catastrophe models, replacement cost values, flood type, and distance to water. At launch, FEMA projected that 23% of policyholders would see immediate premium decreases, 66% would see increases of $0 to $10 per month, and 11% would face increases exceeding $10 per month.

The catch is the statutory 18% annual premium increase cap. For properties whose actuarial rate under Risk Rating 2.0 is substantially higher than their legacy rate, full convergence to risk-adequate pricing will take a decade or more. During that transition, these properties are still receiving an implicit subsidy, and no private carrier can profitably compete for them at the subsidized rate. Before Risk Rating 2.0, approximately 20% to 25% of NFIP policies were explicitly subsidized, with some paying 40% to 60% of full actuarial rates. The 18% cap replaced explicit subsidies with a glide path, but the economic effect is similar: the NFIP continues to write high-risk policies at below-cost rates that private carriers cannot match.

This creates a two-tier market. Properties where the NFIP rate is already at or above actuarial cost represent competitive territory for private carriers. Properties still transitioning under the 18% cap are effectively locked into the NFIP, since any private alternative would need to charge the full risk-adequate premium. The Blueprint cannot expand the private market’s addressable segment without confronting this rate transition dynamic.

Private Flood Insurance: Growth, Stall, and Concentration Risk

The private flood market’s recent trajectory tells a story of rapid growth followed by an abrupt correction. Net written premiums nearly tripled from $302 million in 2020 to $803 million in 2023, then gave back 9.1% in 2024. The combined ratio swung from an extraordinarily low 33.9 in 2023 to 83.1 in 2024.

Year Net Written Premium Year-over-Year Change Combined Ratio
2024$730.0M-9.1%83.1
2023$803.1M+3.7%33.9
2022$774.3M+47.7%N/A
2021$524.2M+73.3%N/A
 Source: Insurance Information Institute, citing S&P Global Market Intelligence

Market concentration adds another risk dimension. The top 10 private flood writers control approximately 79% of the market by direct premiums written. AXA leads at 13.0% ($159.8 million), followed by Assurant at 11.5% ($141.7 million), MS&AD Insurance at 10.7% ($132.1 million), Berkshire Hathaway at 10.7% ($132.0 million), and Liberty Mutual at 7.5% ($92.7 million). Swiss Re, AIG, Allstate, Sompo, and Chubb round out the top 10. Notably, these are diversified carriers and reinsurers treating flood as one line within a broader portfolio, not flood specialists building dedicated capacity.

Specialty flood MGAs like Neptune Flood typically place policies through admitted carrier partners, so their volume appears under the paper carrier’s name in statutory filings. Wright Flood, often cited in flood insurance discussions, primarily operates as an NFIP Write-Your-Own servicer rather than a private flood capacity provider. This structural detail matters: the private flood market is not being built by dedicated flood companies but by large multiline carriers allocating marginal capacity to a line that is profitable in benign years and volatile in active ones.

The Adverse Selection Trap

Adverse selection in flood insurance operates differently from most insurance markets because the subsidized competitor is the federal government. Private carriers use modern catastrophe models and granular data to price at the property level. They can identify properties where their risk-adequate rate is below the NFIP’s posted premium, offer a competitive quote, and write the policy. This process works well for the carrier writing the policy. The systemic problem is what it does to the NFIP’s portfolio.

Every low-risk policy that migrates from the NFIP to a private carrier concentrates the federal program’s remaining book in higher-risk properties. Because the NFIP cannot shed those properties (it is legally obligated to offer coverage in participating communities), its average loss cost per policy rises while its premium base declines. This deterioration cycle increases the program’s structural deficit and, paradoxically, strengthens the case for maintaining premium caps, which in turn reinforces the subsidy that created the adverse selection in the first place.

For the Blueprint to succeed, it needs a framework that encourages private carriers to write across the full risk spectrum, not just the profitable tail. One approach discussed in actuarial literature is a risk-transfer mechanism where private carriers that write high-risk flood policies receive some form of reinsurance support, potentially through the NFIP or a state-level catastrophe fund. Another approach is a gradual acceleration of the 18% cap to bring NFIP rates to actuarial levels faster, expanding the set of properties where private carriers can compete on price. Either approach involves tradeoffs that the Blueprint must explicitly address.

Inland Flood Modeling: The Confidence Interval Problem

Coastal storm surge modeling is relatively mature. Hurricane wind fields follow well-understood physics, historical storm tracks span decades of observational data, and bathymetric profiles along coastlines have been mapped in high resolution. Typical confidence intervals for 100-year return period surge heights run plus or minus 15% to 25%, tight enough to support property-level pricing at rate levels that both carriers and regulators find credible.

Inland flood modeling operates in a fundamentally different data environment. Pluvial flooding (rainfall-driven inundation) depends on hyper-local variables: drainage capacity, soil permeability, impervious surface coverage, elevation gradients measured in inches, and precipitation intensity patterns that can vary dramatically over distances of a few hundred feet. Riverine flooding adds gauge data and hydrological modeling, but still faces compound event challenges where rainfall, snowmelt, and antecedent soil saturation interact in ways that single-peril models struggle to capture.

The result is that inland flood models carry confidence intervals of plus or minus 50% to 100% at the property level for return periods beyond 50 years, compared to the 15% to 25% range for coastal surge. The two primary commercial models, Verisk’s US Inland Flood Model and Moody’s (formerly RMS) US Flood Model, were both introduced commercially in the 2015 to 2018 timeframe. That is less than a decade of development compared to multiple decades for hurricane models.

This modeling gap has three practical consequences for private flood market scaling. First, wider confidence intervals mean that actuarially defensible rate ranges are wider, making it harder for carriers to file rates that are simultaneously competitive with the NFIP and adequate for solvency. Second, regulatory rate review becomes more subjective when the underlying model outputs span a broader range, potentially slowing approvals in states that require prior approval for rate filings. Third, reinsurers face their own modeling uncertainty when pricing excess flood treaties, which pushes reinsurance costs higher and reduces the net margin available to primary carriers.

The NAIC’s Pre-Disaster Mitigation and Risk Modeling Working Group has a direct charge to partner with the CAT COE to analyze how catastrophe models assess risks and to provide modeling training for state regulators. If the Blueprint is serious about expanding private flood coverage into inland areas, this working group’s model calibration and training work becomes a prerequisite, not an ancillary effort.

Solvency Integration: ORSA, RBC, and the Catastrophe Risk Subgroup

The Task Force’s mandate extends beyond market expansion into solvency surveillance. The Pre-Disaster Mitigation and Risk Modeling Working Group is charged with analyzing long-term scenarios affecting insurer solvency in partnership with the CAT COE. On the Financial Condition Committee side, the Catastrophe Risk (E) Subgroup under the Property and Casualty Risk-Based Capital Working Group handles the solvency-side integration of catastrophe risk into RBC formulas.

This dual track, one focused on market access and one on capital adequacy, mirrors the approach the NAIC took with wildfire risk through the RBC adjustment framework. The parallel is instructive: just as wildfire cat models needed to reach sufficient maturity before regulators could require their use in capital calculations, inland flood models need to reach a similar threshold before the Catastrophe Risk Subgroup can incorporate flood-specific factors into the RBC framework. The Pre-Disaster Mitigation Working Group’s model assessment charge feeds directly into this timeline.

For carriers already writing private flood, the ORSA implications are immediate. Own Risk and Solvency Assessment filings increasingly need to address climate-driven peril frequency shifts. Flood exposure, particularly inland flood exposure that may not be captured in legacy catastrophe models, represents exactly the kind of emerging risk that ORSA narratives should address. The NAIC has previously issued guidance through the Financial Condition Committee suggesting that climate risk be addressed in ORSA filings, and the new Task Force structure gives that guidance a stronger institutional anchor.

What the Blueprint Needs to Solve

The Flood Insurance Blueprint faces a set of interconnected actuarial and regulatory challenges that cannot be solved independently. Each barrier reinforces the others, creating a system that has kept private flood insurance confined to a $730 million niche despite decades of policy discussion.

The NFIP’s 18% annual cap on premium increases means that high-risk properties will remain below actuarial rates for years, and private carriers cannot compete for those policies at subsidized prices. Removing or accelerating the cap would address adverse selection but carries political risk, since it raises costs for constituents in flood-prone areas. The Blueprint must navigate this tension explicitly.

Data standardization presents another barrier. Private carriers and their catastrophe model vendors each use different flood zonation, return period definitions, and loss amplification assumptions. Without standardized disclosure of flood risk data, consumers cannot easily compare NFIP and private quotes, and regulators cannot evaluate whether private market rates are adequate. The Severe Peril Working Group’s awareness campaign charge includes technology and scientific research components that could support standardization, but only if the Blueprint defines specific data standards rather than general principles.

Finally, the protection gap exists in part because flood insurance is not mandatory outside SFHAs for borrowers without federally-backed mortgages. Even within SFHAs, compliance with mandatory purchase requirements is estimated at well below 100%. The Blueprint can raise awareness and expand options, but closing the protection gap ultimately requires either broadening purchase mandates or creating economic incentives (such as mitigation-linked premium discounts) strong enough to drive voluntary uptake. The NAIC’s concurrent work on the Strengthen Homes Act model law, which establishes frameworks for mitigation premium credits across catastrophe perils, provides a template that the Blueprint could adapt for flood-specific mitigation measures.

Why This Matters for Actuaries

The Flood Insurance Blueprint is not a theoretical exercise. It will shape the regulatory and competitive environment for every actuary working on catastrophe-exposed property lines. Several implications stand out.

Pricing actuaries should watch how the Blueprint addresses the NFIP subsidy transition. If the 18% cap is accelerated, the addressable market for private flood expands rapidly, and carriers will need pricing actuaries who understand flood model outputs, can translate wide confidence intervals into defensible rate indications, and can navigate the state-by-state filing landscape.

Reserving actuaries at carriers writing private flood need to account for the line’s volatility. The 49.2-point combined ratio swing from 2023 to 2024 demonstrates that private flood reserves can develop adversely in a single catastrophe season. IBNR selections for short-tail flood claims should incorporate catastrophe load scenarios, not just attritional development patterns.

Capital modeling actuaries should monitor the Catastrophe Risk Subgroup’s work on incorporating flood into RBC. As inland flood models mature and the CAT COE provides model assessment guidance, RBC factors for flood exposure may follow the same integration path as wildfire, potentially increasing required capital for carriers with concentrated flood books.

Enterprise risk actuaries working on ORSA filings should proactively address flood exposure in their climate risk narratives, particularly inland flood exposure that falls outside traditional catastrophe model footprints. The new Task Force structure gives regulators a unified lens through which to evaluate whether ORSA filings adequately capture flood risk.

The Severe Peril Working Group’s next public meeting is scheduled for May 14, 2026. That meeting will provide the first public signal of how quickly the Blueprint moves from charge sheet to draft framework. Actuaries with a stake in flood risk, whether through primary underwriting, reinsurance, or regulatory compliance, should track that output closely.

Further Reading

Sources