What is a group medical captive and how does it work?

A group medical captive is a risk-sharing arrangement where multiple employers pool their stop-loss risk in a captive insurance structure. Each employer self-funds their health plan and purchases stop-loss through the captive rather than a commercial carrier. The captive is owned by the member employers, so underwriting profits are returned to members rather than kept by an insurance company. This provides more stable stop-loss pricing, potential profit sharing, and greater control over plan design.

What size employer is a good fit for a group medical captive?

Group medical captives are typically best suited for employers with 100–500 employees who are already self-funded or ready to self-fund. Employers need stable cash flow, 2–3 years of claims history, and a willingness to commit to a multi-year arrangement. Single-parent captives are more appropriate for very large employers (1,000+) who want complete control over their risk financing.

What are the advantages of a medical captive over traditional stop-loss insurance?

Medical captives offer several advantages over traditional stop-loss: (1) underwriting profits return to employer-owners rather than the carrier; (2) more stable multi-year pricing based on the group's collective experience; (3) access to better data and analytics; (4) greater influence over plan design and cost-containment programs; and (5) potential for lower long-term stop-loss costs for employers with good claims experience.

Captive Readiness Assessment | Employer Benefits IQ

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Captive Readiness Assessment

Evaluate your organization's readiness for a medical captive arrangement — single-parent or group/consortium — across five key dimensions.

Data reviewed: August 2026

Updates BPS: Funding Strategy +2 more

Assessment Progress0/10 answered

Assessment area

Organizational Fit

How many benefits-eligible employees does your organization have?

What best describes your industry?

Assessment area

Financial Capacity

Can your organization commit capital to a captive arrangement (typically $250K–$1M+)?

What is your organization's planning horizon for benefits strategy?

Assessment area

Data & Experience

Do you have at least 3 years of detailed claims data?

Is your organization currently self-funded or level-funded?

Assessment area

Governance & Compliance

Does your organization have the governance capacity to oversee a captive entity?

Do you have an advisor with captive experience?

Assessment area

Strategic Alignment

What is your primary motivation for exploring a captive?

Are you open to joining a group/consortium captive rather than forming a single-parent captive?

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Answer all 10 questions to see your captive readiness score.

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Frequently Asked Questions

What is a medical captive and how does it work for employers?

A medical captive is an alternative risk financing structure where an employer (or group of employers) forms or joins a captive insurance company to fund a layer of stop-loss risk. Instead of paying commercial stop-loss premiums to a carrier, the employer contributes to the captive, which retains risk up to a reinsurance attachment point. In years with favorable claims experience, the captive retains underwriting profit that is returned to member employers as dividends or reduced future contributions.

What size employer is a good fit for a medical captive?

Single-parent captives are typically suited for employers with 500+ employees and significant financial resources to capitalize the captive. Group or consortium captives are accessible to employers with 50–500 employees who pool risk with other employers. The minimum viable size depends on the captive structure, collateral requirements, and the employer's risk tolerance. This assessment evaluates your specific situation.

What are the financial requirements for joining a medical captive?

Group captive requirements typically include: (1) collateral deposit of $50,000–$250,000 depending on group size and captive structure; (2) minimum 3-year commitment; (3) adequate stop-loss reserves; and (4) willingness to accept variable annual costs based on claims experience. Single-parent captives require significantly more capital — typically $500,000–$2M or more — plus ongoing regulatory compliance costs.

What is the difference between a group captive and a single-parent captive?

A single-parent captive is owned and controlled entirely by one employer, providing maximum flexibility and control but requiring significant capital and administrative resources. A group captive (or consortium captive) is shared among multiple employers, reducing individual capital requirements and spreading risk across a larger pool. Group captives are more accessible to mid-market employers but involve shared governance and less individual control.

How long does it take to set up a medical captive?

Group captive enrollment typically takes 60–120 days from application to effective date, including underwriting, collateral funding, and documentation. Single-parent captive formation takes 6–18 months, including domicile selection, regulatory approval, capitalization, and operational setup. Most employers joining an existing group captive can be operational within one plan year.

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