A self-funded health plan is an employer-sponsored arrangement where the company pays employees’ medical claims directly out of its own funds, rather than purchasing a traditional insurance policy. About 67% of covered workers in the U.S. are enrolled in self-funded plans, making this the dominant form of employer-sponsored health coverage, even though most employees never realize it.
From the outside, a self-funded plan often looks identical to traditional insurance. You get an ID card, visit in-network doctors, and submit claims the same way. The difference is entirely behind the scenes: your employer, not an insurance company, is the one actually paying those bills.
How Self-Funding Differs From Traditional Insurance
In a fully insured plan, your employer pays a fixed monthly premium to an insurance company. The insurer then assumes the financial risk for all covered claims. If employees have a healthy year, the insurer keeps the unused premiums as profit. If claims are unusually high, the insurer absorbs the loss.
A self-funded plan flips that arrangement. The employer sets aside money to cover claims and pays them as they come in. There’s no premium going to an insurance carrier, which means the employer keeps any surplus in a good year but also bears the cost when claims run high. This direct financial exposure is the defining feature of self-funding.
Most self-funded employers still hire an outside company to handle the day-to-day work of running the plan. These third-party administrators (TPAs) process claims, manage enrollment, issue ID cards, answer member questions, and provide access to provider networks. TPAs typically charge fees on a per-employee-per-month basis. So while it may feel like you’re dealing with an insurance company, the TPA is essentially a contractor. Your employer remains financially responsible for every claim.
Why So Many Employers Choose Self-Funding
Self-funded plans are overwhelmingly popular among large employers. Roughly 80% of covered workers at firms with 200 or more employees are in self-funded plans, compared to 27% at smaller firms with 10 to 199 workers, according to KFF’s 2025 employer health benefits survey. Several financial and practical advantages drive this trend.
Traditional premiums bundle together the actual cost of medical claims, the insurer’s administrative overhead, profit margins, and reserve requirements. Self-funding strips away many of those layers, which typically reduces administrative costs. Companies also benefit from better cash flow: instead of paying premiums upfront each month, they hold onto their money and pay claims only as they’re incurred. That preserved capital can earn interest while it sits in reserve.
Perhaps the biggest draw is access to detailed claims data. Self-funded employers receive reporting that shows exactly where their health care dollars are going, broken down by type of service, condition, and cost trend. That visibility lets companies make targeted decisions, like adding a diabetes management program if data shows rising costs in that area, or adjusting pharmacy benefits based on actual utilization patterns.
Benefit Design Flexibility
Self-funded plans give employers significantly more freedom to design benefits. Because most state-level insurance mandates don’t apply to these plans (more on that below), employers can customize coverage to match their workforce’s needs rather than buying a standardized off-the-shelf policy. A tech company with a young workforce might design a plan that emphasizes mental health and fertility benefits. A manufacturing firm might prioritize musculoskeletal care and physical therapy.
This flexibility also means self-funded employers can offer consistent benefits across state lines. A fully insured plan must comply with each state’s specific coverage requirements, which can create different benefit packages depending on where employees live. A self-funded plan avoids that patchwork, offering the same coverage to all employees regardless of location. Employers can also modify their plan design from year to year without switching carriers, adjusting copays, deductibles, or covered services as their workforce demographics change.
How Employers Manage the Financial Risk
Taking on direct financial risk for employee health claims sounds daunting, and it would be without a safety net. That’s where stop-loss insurance comes in. Nearly all self-funded employers purchase stop-loss coverage to cap their maximum exposure.
Stop-loss insurance works at two levels. Specific stop-loss protects against any single employee’s claims exceeding a set threshold. For smaller groups (under 50 employees), that threshold is typically $50,000 or less per person. Mid-size groups of 50 to 150 employees commonly set it between $50,000 and $100,000. Larger groups may carry specific deductibles above $150,000, and the largest employers may set them as high as $1,000,000. Once any individual’s claims cross that line, the stop-loss insurer reimburses the excess.
Aggregate stop-loss provides a ceiling on total plan spending across all employees for the year. This is especially common among smaller employers, schools, and municipalities that need a firm maximum for budgeting. Aggregate attachment points start at around $150,000 for the smallest groups and scale up from there. Together, these two layers of protection let employers capture the savings of self-funding without facing catastrophic financial exposure.
The Regulatory Difference That Matters
Self-funded plans operate under a fundamentally different legal framework than fully insured plans, and this has real implications for employees. A federal law called ERISA (the Employee Retirement Income Security Act) governs self-funded employer plans and preempts state insurance regulations. The Supreme Court has recognized that this creates two distinct classes of employer-sponsored health coverage.
Fully insured plans must comply with both federal rules and state insurance laws, including state-mandated benefits, consumer protections, and external review processes. Self-funded plans answer only to federal law and the U.S. Department of Labor. States have no authority over them. This means that if your state passes a law requiring insurers to cover a specific treatment or procedure, that mandate applies to fully insured plans but not to self-funded ones.
For employees, this distinction can show up in unexpected ways. If you have a claim dispute with a fully insured plan, you can typically appeal to your state’s insurance department. With a self-funded plan, your recourse runs through the plan’s internal appeals process and potentially federal court under ERISA, but not through state regulators. It’s worth knowing which type of plan you have, especially if you ever need to challenge a coverage decision.
Federal Requirements That Still Apply
Self-funded plans aren’t unregulated. They must comply with several federal requirements. The Affordable Care Act’s provisions around preventive care coverage, dependent coverage up to age 26, and the ban on annual and lifetime dollar limits all apply to self-funded plans. Plans must also prohibit discrimination based on preexisting conditions.
On the tax side, self-funded plans pay a small annual fee called the PCORI fee, which funds patient-centered outcomes research. For plan years ending between October 2025 and September 2026, the fee is $3.84 per covered life. It’s calculated by multiplying that rate by the average number of people covered under the plan during the year. The fee doesn’t apply to plans that cover only dental, vision, or flexible spending arrangements.
How to Tell If Your Plan Is Self-Funded
Your plan documents will indicate whether your coverage is self-funded. The Summary Plan Description, which your employer is required to provide, should state whether the plan is self-insured or fully insured. You can also ask your HR department directly. Another clue: if your ID card shows a well-known insurance company name but your plan documents identify your employer as the “plan sponsor” responsible for funding, you’re likely in a self-funded arrangement where the insurance company is simply administering claims.
Knowing the difference matters most when you’re dealing with coverage disputes, understanding why your plan does or doesn’t cover a particular service, or comparing a job offer’s benefits package. Two plans that look similar on the surface can have meaningfully different protections and appeal rights depending on their funding structure.