Advanced Plan Design
Medical Captives
Group captive arrangements let employers pool stop-loss risk with other like-minded companies — reducing volatility, sharing savings, and gaining access to data most carriers won't share.
What It Is
A medical captive is an insurance structure in which a group of employers jointly own and fund a captive insurance entity to share the risk and reward of their stop-loss layer.
Rather than purchasing stop-loss insurance from a commercial carrier and walking away, captive members contribute to a shared risk pool. When the pool performs well — meaning claims are lower than expected — the surplus is returned to members as underwriting profit.
Medical captives are a natural evolution for employers who have already moved to self-funding and want to take the next step: reducing stop-loss premium volatility, accessing pooled claims data, and aligning their insurance structure with a long-term population health strategy.
Captive arrangements require more engagement than traditional insurance — members must commit to data-driven plan management, wellness initiatives, and multi-year participation. In return, they gain transparency and financial upside that traditional carriers will never offer.
Key Concepts
How Medical Captives Work
What Is a Captive?
A captive is an insurance entity owned and controlled by its members. In a medical captive, employers pool their stop-loss layer to share risk and reward.
Single-Parent vs. Group Captive
Single-parent captives are owned by one employer. Group (or association) captives pool multiple employers, making them accessible to mid-market companies.
The Risk Layers
Members retain a specific deductible layer, contribute to a shared captive layer, and purchase commercial reinsurance above that. Savings in the captive layer are returned to members.
Underwriting Requirements
Captives are selective. Members must demonstrate healthy claims history, wellness commitment, and willingness to engage in data-driven plan management.
Governance and Transparency
Captive members receive detailed claims data, participate in governance decisions, and share in underwriting profit — unlike traditional fully insured arrangements.
Why It Matters
Why It Matters for Employers
"Well-run group captives have returned 10–20% of stop-loss premium to members in profitable years."
"Captive members gain access to aggregate claims data across the pool — a powerful tool for benchmarking and cost management."
"Captives reward healthy, well-managed plans. Employers who invest in population health see compounding returns over time."
Common Pitfalls
Common Mistakes to Avoid
- 1
Joining a captive without understanding the multi-year commitment and exit provisions.
- 2
Failing to evaluate the captive manager's track record, financial strength, and claims handling.
- 3
Underestimating the internal resources required to manage a data-driven, high-engagement plan.
- 4
Choosing a captive based on short-term premium savings rather than long-term structural fit.
- 5
Not aligning the captive arrangement with a broader population health and cost-containment strategy.
FAQ
Frequently Asked Questions
Keep Learning
Related Resources
Resource Library
Employer Guides & Tools
Download checklists, frameworks, and analysis tools for advanced plan design.
Browse resources →Blog
Health Reform Insights
Practical analysis of captive structures, self-funding, and employer cost strategy.
Read the blog →Related Pillar
Stop-Loss Insurance
Understand specific and aggregate stop-loss — the foundation of any captive or self-funded plan.
Learn about stop-loss →Medical Captive Downloads
Is a captive right for your organization?
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