From Fully Insured to Captive: Stop Absorbing Renewals, Start Owning Your Health Plan

It’s renewal time, your broker calls, the number is up, again, and you're told this is just the market. The average employer saw a 10%+ renewal in 2025. If your broker called it "just the market," they weren't wrong. But they also weren't giving you a solution. You absorb it, shift some costs to employees, maybe adjust the plan design, and move on until next year.

At some point, that cycle stops being a frustration and becomes a 5-alarm fire impacting the benefits budget, employee morale, recruiting efforts, employee retention, and company profit margins. Waiting for the market to fix itself isn’t a plan.

Many employers are ready to do something different. A group insurance captive offers a real path to cost control. Ownership in an Insurance Company rather than renting from the Insurance Company. But you can't just flip a switch. Getting there from a fully insured plan involves a meaningful transition, one that's very doable with the right support, but requires planning, alignment, and a willingness to run your benefits more like a business.

Here's how it works.

Why Fully Insured Isn't the Safe Harbor It Used to Be

The appeal of a fully insured plan has always been simplicity. You pay the premium; the carrier handles everything else. The problem is that simplicity comes at a steep price — and worse, it comes with zero visibility or flexibility.

Fully insured employers often receive little to no meaningful claims data from their carriers, particularly around pharmacy spend. That means you're walking into every renewal negotiation without knowing where your money actually went or what the top cost drivers were. As Nauman Shaikh, OneDigital's National VP of Actuarial and Analytics, put it plainly: 

"When you fully insure, you're just negotiating renewals every year. When you have self-funding and you have your data, you can actually apply control measures."

— Nauman Shaikh, OneDigital's National VP of Actuarial and Analytics

The cost pressures driving this, such as specialty drug pipelines, chronic disease prevalence, or provider consolidation aren’t going away. Healthcare inflation is a feature of the landscape, and the employers who get ahead of it are the ones who stop letting carriers hold all the cards.

The Path: Fully Insured → Self-Funded → Captive

There's no direct on ramp from fully insured to a captive. To participate in a group captive, an employer must be self-insured (or making the move to self-insurance). Think of self-funding as the prerequisite and the captive as the enhancement.

Self-funding means your organization pays claims as they occur rather than paying a fixed premium to a carrier. You eliminate carrier risk charges, state premium taxes, and state mandates. You gain full access to your claims data. And you take on the financial responsibility for your plan, with protection in place.

Once you're self-funded, joining a captive layers in shared risk management and collective buying power. You're no longer navigating cost volatility alone.

The Transition: What's Actually Involved

For employers already self-funded, entering a captive is low friction. For fully insured groups, the transition requires more runway, but it's manageable. OneDigital’s Captive Solutions team has managed this transition for employers across industries. We coordinate the TPA, PBM, stop-loss placement, compliance review, and employee communication strategy, so you’re not managing multiple vendors through a change you’ve never done before. While we’ll start as early as we can, the most time-sensitive part of the implementation(s) are the Third-Party Administrator (TPA) and Pharmacy Benefit Administrator(PBM). 60-90 days is recommended for these items, but they can be done faster when needed.

• Get the right people in the room early: This isn't a decision HR makes in isolation. Finance, legal, accounting, and leadership all need a seat at the table. When CFOs and CHROs are looking at the same claims data, the conversation shifts from competing priorities to a shared opportunity.
• Assess financial feasibility: Before anything else, you need to know whether self-funding makes financial sense for your organization. That means reviewing workforce demographics, historical claims trends, and cash flow capacity. Self-funded plans require you to pay claims as they come in, so a sound reserve strategy matters.
• Build out your plan components: Unlike a fully insured plan where everything is bundled, a self-funded plan lets you select best-in-class vendors for each component:
  • Third-Party Administrator (TPA): The TPA takes over the administrative functions your carrier used to handle — processing claims, prior authorizations, managing eligibility, reporting.
  • Network— which carrier network offers the right geographic coverage for your workforce?  Different TPA’s provide access to different carrier networks
  • Pharmacy Benefits Manager (PBM): Will you bundle pharmacy with your TPA, or carve it out separately? Carving it out typically yields meaningful additional savings. Your self-funded captive plan may also unlock additional savings through Patient Assistance Programs (PAP), International Sourcing or 340B pricing. Plus, you’ll received pharmacy rebates for brand prescriptions your members fill.
  • Stop-Loss Insurance: This is non-negotiable. Stop-loss caps your exposure on individual high-cost claims and in aggregate, protecting against the kind of catastrophic year that makes employers nervous about leaving fully insured. In a captive model, the captive brings the stop-loss carrier while each member company selects their specific deductible limit.
• Plan your employee communication: Your employees will notice subtle changes in their ID cards and plan materials. A proactive, clear communication strategy that explains what's changing and why it benefits them is essential.
• Confirm compliance: Self-funded plans are governed primarily by ERISA and federal regulations, which differ significantly from state-regulated fully insured plans. Review your compliance obligations with OneDigital before you go live.

What Changes When You Add the Captive

Once you're self-funded, joining a captive means you're not managing risk in isolation. You're pooling it with a group of like-minded employers who share industry insights and best practices — and who collectively influence the strategic direction of the captive. The Members own the captive and each member gets a vote on any proposed items.

This shared model delivers a few things a standard self-funded plan doesn't:

• Shared risk protection (aka the Captive Layer): High-cost claims are spread across all member companies, reducing the financial impact of a bad year on any single employer. Each Member sets their own specific deductible up to the captive layer (varies by Captive). If a claim exceeds that layer, stop-loss insurance kicks in.
• Dividend potential: When the captive performs well, meaning claims come in below projections, participating employers receive a proportional share of the savings. That's money you can reinvest in your people.
• Proactive cost management: Captive members implement value-based programs, wellness initiatives, and pharmacy strategies together based on captive claims data driving better collective outcomes over time.
• Engagement: Captive members attend meetings to better understand population health and consumer advocacy programs (often virtual) and meet in-person at least annually to share best practices with fellow members.

One group of employers tracked in Benefits Magazine formed a captive with 2,500 employees and held average annual medical cost increases to 2.0% over five years — in a market where 10% renewals are common. That's not luck. That's what happens when employers stop reacting to their health plan and start managing it.

The Employers Who Win Here All Have One Thing in Common

They engage. Captive membership isn't a set-it-and-forget-it arrangement. It requires active participation in plan oversight, risk management programs, and employee engagement. That's a real ask compared to the simplicity of fully insured.

But the employers who make that commitment gain something the fully insured market can't offer: real control, real data, and a real stake in the outcome.

Ready to See If a Captive Makes Financial Sense for You?

Not sure if a captive is the right fit? OneDigital's Captive Solutions team offers a no-obligation feasibility assessment so you can see the financial case before you commit to anything. That's exactly how we'd want to be treated. 

Reach out to learn more, and download our Cost Containment Playbook for 25 additional strategies to manage healthcare, pharmacy, and workforce costs.