What is a Captive?
What is a captive, and is it a right fit for my company?
If your company has 100 to 1,000 employees, you have probably experienced the same frustrating health insurance cycle: receive a high renewal, maybe negotiate with the carrier, shop the market, adjust deductibles or contributions, and hope next year is better.
Increasingly, employers are asking whether there is another way.
Perhaps a Captive is the solution?
An employee benefits captive is a self-funded health insurance strategy that allows multiple employers to pool a portion of their healthcare risk together. The employer retains the advantages of self-funding—including greater transparency and control—but uses the size of the captive to spread risk, improve purchasing leverage and reduce the financial volatility that can make traditional self-funding uncomfortable for a midsize company.
In simple terms, a captive attempts to give a 200- or 700-employee company some of the advantages normally associated with being a much larger employer.
That matters because healthcare costs are becoming increasingly difficult to manage through annual carrier negotiations alone. In ParetoHealth's 2026 survey of more than 1,500 CEOs and senior HR and finance leaders, 79% said their total healthcare spend had increased by double digits during the prior 12 months, and 77% said they were exploring new health-plan funding models.[1]
For employers tired of reacting to renewals, a captive offers a fundamentally different approach.
How Does an Employee Benefits Captive Work?
A benefits captive is still a form of self-funding.
Instead of paying an insurance carrier a single premium and transferring virtually all claims risk to the carrier, the employer funds its employees' medical and pharmacy claims.
The difference is how larger claims are managed.
A typical employee benefits captive has three layers.
The first layer is the employer's own claims. The company pays smaller and more predictable claims up to a predetermined individual threshold, commonly called the specific deductible.
The second layer is the captive. Claims above the employer's retained amount enter a shared risk layer funded by participating employers. Instead of one 250-employee company absorbing all of that volatility by itself, a much larger community of employers shares that defined portion of the risk.
The third layer is commercial stop-loss insurance. Very large claims are transferred to a stop-loss carrier, placing a ceiling around catastrophic exposure.
The captive layer can be described as a financial "shock absorber" between the claims an employer can reasonably retain and the catastrophic claims that should be insured.[2]
In other words, stop-loss captives are a middle ground that can give midsize employers access to the advantages of self-funding as a large Fortune 500 company by pooling portions of their risk together with other midsize employers.
The objective is not to eliminate risk. It is to put each layer of risk where it can be handled most efficiently.
Why Does the Size of the Captive Matter?
This is one of the most important concepts for an employer evaluating a captive.
Insurance works better when risk can be spread across a larger, diversified population.
A 200-employee company buying stop-loss coverage alone represents one risk to the stop-loss market. A captive representing more than a million covered lives creates a much different purchasing position.
That scale can create two important advantages.
First, it can make the captive risk pool more stable. One employer having a bad claims year becomes less significant when that risk is spread across a very large group.
Second, scale can create negotiating leverage with stop-loss carriers, administrators, pharmacy partners and other healthcare vendors.
For perspective, a captive we use called ParetoHealth currently reports a community of more than 4,000 employers, 1.3 million covered lives and $8.4 billion in healthcare spend under management.[3]
That is the purchasing-power concept behind a large benefits captive: a midsize employer is no longer approaching the healthcare marketplace entirely on its own.
Can a Captive Lower Stop-Loss Costs?
Potentially—but the bigger issue is often stop-loss predictability, not simply obtaining the cheapest first-year premium.
Traditional self-funded employers can receive an attractive stop-loss proposal and then experience a difficult renewal after a large claimant emerges.
They can also encounter a laser.
A laser occurs when the stop-loss carrier assigns a higher deductible to a particular high-risk individual. For example, an employer might have a $100,000 specific deductible for everyone else but be required to retain substantially more risk for one known claimant.
For a 150- or 300-employee company, that can dramatically change the economics of the plan.
A large captive can use its collective purchasing power to negotiate stronger stop-loss terms than many midsize employers could obtain individually.
Proper only partners with captives that include caps on stop-loss renewal increases and a guarantee of no new lasers for the lifetime of a member's participation.
This distinction is critical.
A company evaluating stop-loss should not ask only:
"What is the premium this year?"
It should also ask:
"What protections do we have when we actually use the insurance?"
A slightly cheaper contract with weak renewal protection can become extremely expensive after one difficult claims year.
How Is a Captive Different From Fully Insured or Level-Funded Coverage?
The fundamental difference is who controls the healthcare dollars and who benefits when claims perform well.
Fully insured employers pays a fixed premium to the carrier. Simple and predictable during the contract year, but typically offers less claims transparency and fewer opportunities to directly benefit from favorable claims. Level-funded employers can also expect predictable monthly payments, but with some self-funded characteristics and potential surplus.
Traditional self-funded offers greater transparency and flexibility, but the employer bears more direct claims and stop-loss renewal volatility.
Self-funded through a captive - Employers retain self-funded transparency and upside while sharing a defined layer of risk with other employers and purchasing catastrophic protection at scale.
For a fully insured company, moving into a captive is therefore more than switching insurance carriers.
It changes the financial model underneath the health plan.
Instead of repeatedly asking, "Which carrier will give us the best renewal this year?" leadership can begin asking, "What is actually driving our healthcare spending, and what can we do about it over the next 5 years?"
That is a much more powerful question.
What Happens When Claims Are Better Than Expected?
This is another important difference.
In a traditional fully insured arrangement, an employer generally does not directly participate in the carrier's underwriting result simply because its employees had a particularly good claims year.
With self-funding, favorable claims experience can accrue much more directly to the employer.
A captive adds another potential source of upside: depending on the captive's structure and performance, favorable results within the pooled risk layer may be retained, returned or otherwise benefit participating employers. Conversely, captive members also share defined losses when the pool performs poorly.
That is why employers should understand exactly how a particular captive handles funding, surplus, losses and capital.
Not every arrangement marketed as a "captive" is structured the same way.
Why Would a Fully Insured Employer Consider a Captive?
For a fully insured employer, the biggest reason is often control.
The company may currently spend several million dollars per year on healthcare but receive limited information explaining where that money actually goes.
Self-funding can create substantially better visibility into medical claims, prescription drug spending and the underlying conditions driving cost.
Once you have that information, you can start doing something with it.
That may mean evaluating pharmacy contracts, specialty medications, centers of excellence, provider strategies, care-navigation programs or other targeted solutions.
The goal is no longer simply to buy insurance more efficiently.
It becomes buying healthcare more efficiently.
Risk stabilization is the foundation that allows employers to pursue a multi-year cost-management strategy.
What If I’m Already Self-Funded?
A captive can be just as interesting for an employer that is already self-funded.
Traditional self-funding may already provide excellent claims visibility and plan flexibility. The problem can be volatility.
A few large claims can significantly affect the employer's experience. Stop-loss renewals can move sharply. Known claimants may create lasers. Leadership may become uncomfortable with the amount of financial variation from year to year.
Joining a sufficiently large captive can preserve much of what the employer likes about self-funding while adding another layer of risk sharing.
Put differently:
A fully insured employer may enter a captive to gain control.
A traditionally self-funded employer may enter one to gain stability.
Both can benefit from greater scale.
Does a Captive Guarantee Lower Renewals?
No—and an employer should be skeptical of anyone promising that it does.
Medical and pharmacy costs still increase. Employees still have claims. New treatments still enter the market.
A captive cannot repeal healthcare inflation.
What a strong captive can attempt to eliminate is unnecessary volatility: the sudden financial swings, lack of transparency and stop-loss surprises that make it difficult for a midsize employer to plan several years ahead.
The difference between "our healthcare costs increased because healthcare utilization genuinely increased" and "our renewal increased 28%, and we cannot clearly explain why" is enormous.
That is where better data, risk pooling and stronger purchasing leverage can change the conversation.
ParetoHealth's own claims-based study reports that members moving from fully insured coverage experienced estimated savings of 7.5% in year one, 13.2% in year two and 16.5% in year three compared with remaining fully insured; Pareto says Milliman reviewed its methodology. These are Pareto-reported results, not guaranteed outcomes for an individual employer.[5]
What Should an Employer Look for in a Captive?
The word "captive" alone is not enough.
A company should understand the size and diversification of the risk pool, who owns and governs the arrangement, how much capital is required, how gains and losses are allocated, the quality of the stop-loss contract, whether new lasers are permitted, how renewal increases are handled, what claims and pharmacy data the employer receives, and which cost-management programs become available.
Most importantly, employers should evaluate whether the captive is large and mature enough to perform during difficult claims years.
A captive looks easy when claims are good.
The real test is what happens when they are not.
Is a Captive Right for a 100–1,000 Employee Company?
For many midsize employers, it deserves serious consideration.
A captive can be particularly compelling for an organization that has experienced repeated double-digit fully insured renewals, has outgrown a level-funded arrangement, wants greater healthcare data transparency, is already self-funded but dislikes stop-loss volatility, or wants access to purchasing leverage normally available only to substantially larger employers.
It is not appropriate for every company.
But for employers spending millions of dollars per year on employee healthcare, continuing to renew the same financing structure simply because it is familiar can be a much bigger decision than it appears.
The goal should not be to chase the cheapest insurance quote every twelve months.
It should be to build a benefits strategy that makes healthcare costs more transparent, more predictable and more manageable over time—while continuing to provide employees with an excellent health plan.
At Proper Benefits Brokerage, that is the conversation we believe employers should be having.
If your company has 100 to 1,000 employees and you are facing another difficult renewal—or you are already self-funded and want to reduce volatility—we can model how a captive compares with your current arrangement before your next renewal forces the decision.
Talk with Proper Benefits Brokerage about whether an employee benefits captive makes sense for your organization.
Frequently Asked Questions
Is a captive the same as self-funded health insurance?
A benefits captive is a form of self-funding, but participating employers share a defined portion of risk through the captive rather than retaining all of that layer independently.
How many employees does a company need for a benefits captive?
Requirements vary by captive. Large employee-benefits captive platforms commonly serve midsize employers, and ParetoHealth specifically targets employers with roughly 50–1,000 employees. For Proper's target market, companies with 100–1,000 employees are particularly worth evaluating because healthcare spend is meaningful while individual purchasing scale may still be limited.
Can a captive prevent a large stop-loss renewal?
Captive structures may provide stronger stop-loss purchasing leverage and contractual renewal protections, but terms differ by platform. ParetoHealth, for example, currently advertises stop-loss rate caps and a lifetime no-new-laser guarantee for participating employers.
Can a company keep its current benefits in a captive?
Often, moving to a captive changes the way the plan is financed rather than requiring the employer to reduce benefits. Plan design, network, TPA and pharmacy arrangements depend on the captive and the employer's strategy.