The Version You've Probably Already Heard
In a fully insured plan, your company pays a fixed monthly premium to an insurance carrier. The carrier takes on the financial risk for your employees' claims. Good year or bad year, your premium stays the same. The carrier keeps any surplus when claims run low and absorbs the losses when they run high.
In a self-funded plan, your company pays claims as they come in. You're not transferring risk to anyone. Most self-funded employers buy stop-loss insurance to cap catastrophic individual claims and total annual exposure, but the underlying cost of healthcare flows directly from your budget, not from a premium you paid in advance.
That's the standard explanation.Here's what usually gets left out.
What You Actually Own When You're Self-Funded
When you're self-funded, you own your claims data, every claim, every diagnosis, every pharmacy transaction, every provider your employees are using. That data is yours to access and analyze.
This matters more than most employers realize. Without it, you're responding to renewal numbers without understanding why they moved. With it, you can see which conditions are driving your highest spend, identify employees trending toward expensive episodes before they happen, and audit whether your pharmacy benefit manager is pricing medications fairly.
Fully insured employers don't have any of this. The carrier owns the data. When your renewal comes back 11 percent higher, you're told to trust the number. There's no other option.
Self-funded employers who treat their claims data like something to file rather than something to act on are leaving the most significant advantage of self-funding completely unused. And unfortunately, that's most of them.
The Risk Conversation Gets Framed Backwards
The conventional framing positions fully insured as the "safe" choice and self-funded as the"risky" one. That framing doesn't really hold up when you look at what you're actually paying for.
In a fully insured plan, you're accepting guaranteed annual cost increases, typically somewhere between 8 and15 percent, in exchange for premium predictability. You're not eliminating risk. You're paying the carrier to take it on, plus their administrative overhead, plus their profit margin, plus a reserve cushion for bad years. That predictability has a real price embedded in it that never shows up as a line item.
In a well-managed self-funded plan, you gain tools to actually influence your cost trajectory. Claims will vary year to year, that's what stop-loss is for, but the long-term direction is something you can shape through population health management, smarter pharmacy contracting, and strategic provider arrangements.
That said, self-funding is only the right answer for employers who are willing to manage what they own. It's a tool, and like any tool, it only works if someone picks it up.
The Costs You're Not Seeing in a Fully Insured Plan
When employers compare fully insured versus self-funded, they usually look at premium totals on one side and projected claims plus stop-loss on the other. That comparison tends to miss a few things.
Start with how carriers report your loss ratio. In a fully insured plan, it's presented as premium versus claims paid, but that claims number isn't net. Carriers collect drug rebates and other cost offsets generated by your plan, and those flow to their bottom line, not back to you. So when they show you an 88 percent loss ratio to justify a renewal increase, the true net figure (claims minus rebates) would look meaningfully different. In a self-funded plan, those rebates belong to you.They offset your actual plan costs, and you can see exactly what you're receiving.
Beyond rebates, premium taxes add 2 to3 percent to every dollar spent in a fully insured arrangement. Self-funded plans governed by ERISA don't pay these. For a company spending $3 million on healthcare annually, that's $60,000 to $90,000 going to taxes with nothing to show for it.
State benefit mandates apply to fully insured plans but generally not to self-funded ERISA plans. Depending on where you operate, this can mean required coverage for treatments or providers that have nothing to do with your workforce's actual health profile.
None of this appears as a separate line item. It's just inside the number you agree to every year.
What Self-Funding Actually Requires
The day-to-day functions of a self-funded plan claims processing, network access, member services, are handled by a Third Party Administrator, or TPA. Stop-loss coverage protects against high-dollar individual claims and excessive total annual spend. And someone needs to be actively managing the population health and cost strategy your claims data makes possible.
That last part is where things most often fall short. Employers make the structural move to self-funding and then keep receiving the same annual renewal review they got when they were fully insured. The structure changes. The management approach doesn't. The result isa plan that carries the exposure of self-funding without capturing any of the upside.
Effective self-funded management means reviewing claims data quarterly, auditing your PBM contract for spread pricing and rebate transparency, identifying rising-risk employees before their conditions become catastrophic claims, and directing employees toward high-value providers instead of defaulting to whoever's in the network. That's active management — and it's the only way self-funding delivers on what it promises.
Is Self-Funding Right for You?
Most employers in the 100 to 5,000employee range are reasonable candidates for self-funding. But size alone isn't the determining factor. The more telling questions are about how your benefits are currently being managed.
Does your broker give you quarterly claims analytics, or do you mainly hear from them when renewal comes around? If it's the latter, you're not getting the management that self-funding requires and if you're already self-funded, you're likely not capturing the value of it.
Has your PBM contract ever been independently audited? PBM opacity is one of the most consistent cost drivers we find when we dig into self-funded plans that aren't being actively managed.
Is your benefits strategy built around your actual workforce, or does it follow a template that looks like everyone else in your industry? A manufacturing company with an average employee age of47 has very different health management needs than a tech company with a median age of 31. If your benefits don't reflect that, that's worth examining.
The Bottom Line
The difference between self-funded and fully insured is ultimately a difference in who has control over data, over strategy, and over where costs go over time.
Fully insured plans are built for employers who want simplicity over control. Self-funded plans are built for employers who are willing to actively manage their largest people-related expense in exchange for the tools to reduce it.
The structure alone doesn't produce savings. What you do with it does.
Ready to understand what your current funding arrangement is actually costing you? Contact us for a benefits strategy assessment. We'll show you exactly what you own, what you're missing, and what a root cause approach could mean for your bottom line.
About the Author: Genesys Health specializes in root cause benefits consulting for self-funded employers. We work with organizations of all shapes and sizes, from manufacturers and family offices to PE-backed companies and beyond, helping them transform benefits from a line item into a strategic asset.
