The Hybrid Models Nobody Is Building: Where the Structural Gaps and the Product Opportunities Intersect

Series 06 documented the populations that level funded fails. Series 08 has evaluated the alternative models that exist or are emerging. Placing those two bodies of analysis in direct contact reveals something important: the populations most consistently underserved by both level funded and its alternatives are not underserved because no one has thought about them. They are underserved because the products that would serve them require regulatory clarity that does not yet exist, operational investment that has not been made, or design innovation that has not been attempted.

The gap map is the starting point for any TPA or benefits operator thinking about where growth exists in the 1-to-50 market beyond incrementally better versions of products that already exist.

The Population Gap Map

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Series 06 identified six employer-workforce combinations where level funded’s foundational design assumptions break down.

Micro-employers below 10 lives cannot access level funded because individual group variance is too high for stop loss underwriting to price reliably. The actuarial math does not produce stable pricing at small group sizes, and the premium volatility that results makes the product unattractive for employer and carrier alike.

Fractional and portfolio workers — estimated at 27 million primary independent workers by MBO Partners’ 2024 State of Independence study — lack a coverage mechanism that persists across multiple employer relationships. When the engagement ends, the coverage ends. No model in current commercial operation provides coverage that bridges the transitions that define this workforce.

Low-wage workers enrolled in high-deductible plans face coverage that is nominally available but functionally unusable. A worker earning $35,000 with a $5,000 deductible has $5,000 of expected annual out-of-pocket risk, which is a substantial fraction of their take-home income. The plan exists; access to care does not function as intended.

The 55-to-64 pre-Medicare cohort faces a convergence of high healthcare utilization, increasing probability of expensive chronic conditions, and stop loss pricing that reflects that actuarial reality. Employers with workers in this cohort, particularly small employers where one or two high-utilizing individuals can destabilize a small plan, face renewal volatility that makes level funded unattractive.

High-turnover workers whose employment duration is shorter than the plan year disrupt the plan-year model. Level funded pricing assumes covered lives accumulate claims over a 12-month period. A workforce where a significant share of employees turns over every three to six months produces a claims population that changes faster than the underwriting model assumes, creating adverse selection as healthier workers exit while sicker workers or dependent family members remain on the plan.

Rural and geographically isolated workers face network inadequacy. In markets where the available network does not include providers the member can practically access, the coverage exists on paper but not in practice.

The Model Coverage Map

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The models Series 08 has evaluated address some of these population gaps, partially, under specific conditions.

ICHRA addresses the fractional worker problem for employers who want to fund individual coverage rather than manage a group plan, but depends on individual market quality in the worker’s location and the worker’s ability to navigate plan selection independently. For the fractional worker who works for multiple clients, ICHRA does not persist across the transition because each employer’s ICHRA terminates when the relationship ends.

AHPs could address micro-employer pooling through association aggregation but currently operate only under the pre-2018 advisory opinion framework, which requires genuine organizational purpose and commonality that limits eligible association types.

MEWAs provide the correct structural mechanism for micro-employer pooling but face formation barriers that make legitimate MEWA creation prohibitively expensive for the employer segments that need it most, and a regulatory environment built to prevent the fraud that plagued the market historically.

PEOs solve the coverage access problem for micro-employers by routing them through a large-group master plan, but require the employer to surrender HR autonomy and benefits design authority in ways that many employers in the 10-to-50 range find unacceptable.

Captives address mid-market employers seeking risk-sharing and underwriting profit return but have not yet been structured in forms that serve the sub-50 market consistently. The operational investment required to organize a small-group medical stop loss captive at viable actuarial scale exceeds what most TPAs serving this market have made.

Portable benefits address the fractional worker’s persistence problem but do not currently exist as a legally settled, commercially available product. The legislative environment is improving, not resolved.

The Gaps

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Four specific gaps remain after mapping populations against models.

The fractional worker coverage persistence gap has no current solution. ICHRA terminates with the employer relationship. Individual marketplace coverage persists only if the worker keeps paying premiums after the engagement ends, which many cannot afford. Portable benefits legislation is moving but has not produced a settled regulatory framework. The fractional worker who wants coverage that persists across client relationships — not coverage that requires them to reapply, pay full individual market premiums, or navigate a new enrollment process with each transition — has no current product.

The micro-employer cost-manageable coverage gap persists. PEOs solve the group access problem for micro-employers but not the cost management problem. A 7-person employer whose employees are covered through a PEO master plan has no claims transparency, no plan design authority, and no cost management capability. Level funded could give this employer those tools but cannot price reliably at 7 lives. AHPs and MEWAs could pool enough micro-employers to create a viable group but face regulatory barriers. Captives are not yet structured for this size. The micro-employer who wants cost transparency and management capability has no available product.

The low-wage high-deductible gap requires either a change in the cost-sharing structure, a change in the employer contribution to reduce member cost-sharing exposure, or a supplemental layer that fills the deductible gap. None of these solutions has been packaged as a standard, commercially available product for the 1-to-50 market. The GCHRA can fill the deductible gap with employer funds but is not paired with a self-funded plan in a way that creates cost management capability alongside cost-sharing relief. The supplemental level funded concept explored in LFP-08.06 addresses this gap in principle but does not exist as a product.

The high-turnover coverage cliff reflects a plan-year assumption that does not fit workforce realities in hospitality, food service, retail, and staffing. No model rethinks the plan-year as the fundamental coverage unit. Short-term medical plans exist but are not ACA-compliant and cannot be offered as employer-sponsored coverage under standard group health plan rules. The coverage gap for workers whose employment is measured in months rather than years remains.

Addressable vs. Regulatory-Dependent Gaps

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The four gaps differ in how much regulatory change is required to address them.

The micro-employer and low-wage gaps are addressable within the current regulatory framework through product design. A TPA that organizes a medical stop loss captive with enough member employers to achieve actuarial credibility can serve micro-employer clients with cost transparency, underwriting profit return, and plan design flexibility that PEOs cannot provide. The capital and organizational investment is real but does not require congressional action. A TPA that pairs its level funded product with a GCHRA layer calibrated to reduce member cost-sharing exposure to manageable levels can address the low-wage deductible gap with existing legal tools. These are product design decisions.

The fractional worker persistence gap requires either regulatory clarification on multi-employer ICHRA coordination or portable benefits legislation. Both are in motion. A TPA that builds a multi-employer ICHRA administration platform now, before legislation is finalized, can serve fractional worker clients under existing legal tools and convert smoothly to whatever framework federal legislation eventually creates. This is a technology and operational investment that does not require regulatory change to begin.

The high-turnover coverage cliff requires rethinking the plan-year model in a way that current ERISA and ACA frameworks do not obviously support. Continuous enrollment models, rolling plan years for individual employees rather than employer plan years, and coverage-on-demand structures all require regulatory design that has not been developed. This gap is the least addressable through product innovation alone.

The Series 15 Connection

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The unbuilt products identified above — the micro-employer captive, the GCHRA-paired level funded plan, the multi-employer ICHRA platform, and eventually a portable benefits administration layer — are the product opportunities that Series 15 will address. The tiered product model, including the Black tier architecture, is designed to address precisely the population gaps that the existing market has not served.

The distinction this article makes between addressable gaps and regulatory-dependent gaps maps directly to the product development sequence Series 15 proposes. Products that can be built now within existing regulatory frameworks belong in the near-term development roadmap. Products that require regulatory change belong in the advocacy and monitoring category, with architecture development proceeding in parallel so the product can launch quickly when the regulatory path clears.

Why the Market Has Not Built These Products

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The gaps documented above are not recent discoveries. The micro-employer coverage problem is as old as the ACA’s small group market. The fractional worker coverage gap has grown as independent work has grown. The low-wage deductible adequacy problem exists in every year that high-deductible plans dominate the employer market. The high-turnover plan-year mismatch predates the ACA. Identifying the gaps is not the hard part. The hard part is explaining why sophisticated operators in a large market have not built the products to fill them.

The market has not built these products for four reasons. First, the employer-side demand signal is dispersed and unorganized. Individual micro-employers who cannot access level funded are not a purchaser group that approaches TPAs or carriers with a specific product request. They are simply absent from the market. Carriers and TPAs do not see them as prospects because they cannot serve them with existing products. The demand exists but is invisible.

Second, the regulatory uncertainty that surrounds the most promising solutions — MEWAs, captives for small groups, portable benefits — creates investment risk that discourages product development. A TPA that invests in a MEWA structure may find the regulatory landscape has shifted by the time the product is ready. The option value of waiting for regulatory clarity is high, and the cost of premature investment is real.

Third, the administrative complexity of serving very small employers at very low per-employer revenue is a genuine economic barrier. The compliance costs, the systems integration requirements, and the customer service demands of a 5-person employer are not proportionally smaller than those of a 50-person employer. At $40 to $65 PEPM and 5 covered employees, the TPA’s revenue from a micro-employer client is $200 to $325 per month. The economics of serving that client with the same infrastructure that serves a 30-person client are difficult.

Fourth, the employers who would benefit most from these products — micro-employers, employers with fractional workers, employers with low-wage workforces — are not the employers that brokers prioritize. Broker compensation is typically percentage of premium or PEPM-based. Smaller employers generate less commission. The distribution system that routes employers to products has economic incentives that point toward larger, more affluent employers with more conventional workforces. The populations most underserved by the existing market are also the populations least well served by the existing distribution system.

These reasons explain the gap without validating its persistence. The regulatory environment is improving. The computational and systems costs of building new administrative products have declined. The fractional and micro-employer populations are growing. The argument that the existing market structure justifies the existing product gap is weaker in 2026 than it was in 2016.