Self-Funded vs Level-Funded vs Fully-Insured Health Plans: How Small Employers Cut Premium Costs Without Taking on Catastrophic Claim Risk

The renewal letter lands in your inbox and your stomach drops. Your fully-insured small group plan, the one that already eats 12 percent of payroll, is going up another 11 percent. According to the Kaiser Family Foundation's 2025 Employer Health Benefits Survey, the average annual family premium for employer-sponsored coverage now sits at $26,993, and Mercer projects benefit costs per employee will climb another 6.7 percent in 2026, the steepest jump in fifteen years. For a twenty-person company, that translates into tens of thousands of dollars in incremental cost with no improvement in benefits.

Most owners of growing businesses assume there are only two paths: pay the renewal and grumble, or shop the same fully-insured product across three or four carriers and hope someone undercuts the incumbent. But there is a third path that has quietly become the dominant funding model for mid-sized employers and is now reshaping the small group market. Thirty-seven percent of covered workers at firms with 10 to 199 employees are now on level-funded plans, and another 27 percent are on traditional self-funded arrangements. Together, that means a majority of small group health benefits are no longer purchased the way they were a decade ago.

Understanding the three funding mechanisms (fully-insured, self-funded, and level-funded) is no longer optional for owners who care about cash flow, talent retention, or the long-term sustainability of their benefits budget. The differences are not cosmetic. They change who carries the risk of a bad claim year, who keeps the money when claims come in under budget, what regulatory regime applies, and what happens to your renewal if one employee gets seriously ill.

How Fully-Insured Plans Actually Work

A fully-insured plan is what most small employers think of when they say "we have group health insurance." You sign a contract with a carrier (Blue Cross, Aetna, United, Cigna), you and your employees pay a monthly premium, and the carrier pays every claim that comes in. If your workforce has a catastrophic year and burns through claims worth three times what you paid in premium, that loss is the carrier's problem. If your workforce stays healthy and the carrier collects far more in premium than it pays out, that profit is the carrier's too.

The premium is calculated using community rating rules under the Affordable Care Act for groups under 50 employees, meaning the carrier can only vary price based on age, geography, family size, and tobacco use. It cannot underwrite based on the actual health of your specific employees. That seems fair, and in some ways it is. But it also means you are pooled with every other small employer in your state, including the ones with sicker workforces, older demographics, and worse claims histories. You are subsidizing them, and there is no mechanism to opt out of that subsidy.

For 2026, the median proposed small group rate increase across 318 insurers in all fifty states is 11 percent. About 3 percentage points of that increase is attributed by actuaries to favorable groups migrating out of the ACA small group pool into self-funded and level-funded arrangements. In other words, the healthier employers are leaving, the small group risk pool is concentrating around sicker employers, and the remaining fully-insured premium is climbing to match. If you are a small employer with a healthy workforce, staying fully-insured means you keep paying for someone else's claims.

What You Get in Return

Fully-insured plans have genuine advantages that should not be dismissed:

• Zero administrative complexity. The carrier handles claims processing, ID cards, network management, ERISA disclosures, and regulatory filings. You sign the renewal and write the check.
• Predictable monthly cost. Premium is fixed for twelve months regardless of how the claims play out.
• No exposure to catastrophic claims. A million-dollar premature infant or a half-million-dollar oncology case is the carrier's loss, not yours.
• State insurance department backstop. If the carrier becomes insolvent, state guaranty funds protect participants.
• Essential health benefits mandated. Maternity, mental health, prescription drugs, preventive care, and the rest of the ACA's ten essential benefit categories are required.

The trade-off is that you have surrendered any chance of capturing the upside when your group runs a good year, and you are price-takers on every renewal.

How Self-Funded Plans Actually Work

A self-funded plan inverts the basic economics. Instead of paying a carrier to assume the risk, you (the employer) become the insurance company. You set aside money each month to pay claims as they come in. You hire a third-party administrator (TPA) to process claims, manage the network, and handle customer service. You buy stop-loss insurance to cap your exposure on catastrophic claims. And whatever is left at the end of the year, when claims come in below your expectations, stays in your bank account rather than going to a carrier's shareholders.

In 2025, 67 percent of all covered workers in the United States were enrolled in self-funded plans, including 80 percent of those at firms with 200 or more employees. Historically, self-funding was the domain of large corporations with the cash reserves to ride out a bad claims month and the in-house benefits expertise to manage the complexity. That has changed. With aggressive stop-loss products and outsourced administration, self-funded arrangements now reach into the 50 to 199 employee market, and level-funding (covered below) has extended the model down to groups as small as ten or fifteen employees.

The Three Cost Components

A self-funded plan has three discrete cost buckets, which is conceptually different from a fully-insured plan where everything is rolled into one premium:

1. Administrative fees paid to the TPA on a per-employee-per-month (PEPM) basis. Typical range is $30 to $60 PEPM depending on services included.
2. Stop-loss premium paid to an insurance carrier for the catastrophic backstop. Specific stop-loss premiums for small groups generally run $60 to $200 PEPM depending on attachment point and demographics.
3. Claims funding for the actual medical bills. This is the variable component, and it is where you either save money or get burned.

Add the three together and compare against an equivalent fully-insured premium. For a healthy group, the total is often 10 to 30 percent lower in a given year, with additional upside if claims come in below the projection.

Stop-Loss: The Catastrophic Backstop

Stop-loss insurance is what makes self-funding survivable for small employers. There are two types, and you typically buy both:

Specific stop-loss caps your liability on any one covered person. If your specific attachment point is $50,000, the stop-loss carrier reimburses you for any claims above $50,000 for any single individual. For groups under 200 lives, specific deductibles in the $50,000 to $100,000 range are typical. Lower attachment points cost more in premium but provide tighter protection.

Aggregate stop-loss caps your total claims exposure across the whole group. The carrier calculates your expected claims and sets the aggregate attachment point at 110 to 150 percent of that number. If your total paid claims for the year exceed the aggregate, the carrier reimburses the difference. For groups of 50 or fewer employees, the National Association of Insurance Commissioners minimum aggregate attachment point is the greater of 120 percent of expected claims or $4,000 times the number of employees.

The interaction between specific and aggregate coverage means that in the absolute worst-case scenario (multiple million-dollar claims hitting in a single year), your loss is contained somewhere in the low-to-mid six figures rather than the seven or eight figures the raw claims would suggest. That is what makes the math work for a small employer.

How Level-Funded Plans Bridge the Gap

A level-funded plan is the financial product that took the small group market by storm over the last five years. It is technically a self-funded arrangement (you are the plan sponsor, you carry ERISA fiduciary duties, claims flow through a TPA), but it is packaged to behave like a fully-insured plan from a cash-flow perspective.

Here is the mechanic: you pay a fixed monthly amount to the carrier. That fixed amount is split internally into administrative fees, stop-loss premium, and a claims fund deposit. The claims fund is in your name, but the carrier manages cash flow so that you never write a second check during the year, regardless of how claims play out. If actual claims exceed the funded amount, the carrier covers the gap (through stop-loss) and you owe nothing more. If actual claims come in below the funded amount, the surplus is returned to you, typically 12 to 18 months after the plan year ends.

From a budget perspective, your bookkeeper records the same line item every month, identical to a fully-insured premium. From a risk perspective, you are capped at the fixed monthly amount with stop-loss handling everything above that. From an upside perspective, you keep the unused claims fund if your group stays healthy.

Underwriting Is the Gating Factor

There is one significant catch. Level-funded plans are not subject to ACA community rating rules in most states. Carriers can and do underwrite the group, asking for medical history questionnaires, prescription drug data, and prior claims experience before quoting. A young, healthy group with no chronic conditions and minimal claims history will receive aggressive pricing, often 20 to 30 percent below a fully-insured equivalent. A group with older employees, a couple of dependents on specialty medications, or a recent cancer claim may be rated up, declined entirely, or quoted at terms that make staying fully-insured the better option.

This is the fundamental reason level-funded plans are growing so fast: they let healthier-than-average small groups exit the community-rated pool and capture savings. It is also the fundamental reason regulators worry about them. Adverse selection in the small group ACA market is real, the migration is measurable in the rate filings, and the remaining fully-insured small group population is paying the price.

Side-by-Side: Which Plan Fits Which Employer

Factor	Fully-Insured	Level-Funded	Self-Funded
Monthly cash flow	Fixed	Fixed	Variable
Catastrophic risk	Carrier	Stop-loss carrier	Stop-loss carrier
Underwriting	Community-rated	Medical underwriting	Medical underwriting
Upside if claims low	None	Refund of surplus	Retain all savings
Best group size	Any	10 to 200 employees	75+ employees
Regulatory regime	State + ACA	ERISA + state stop-loss	ERISA
Plan design flexibility	Limited	Limited	High
Renewal volatility	Modest	High (claims-based)	High (claims-based)
Administrative burden	Minimal	Moderate	Significant

The decision rarely comes down to one factor. It is a conversation about your workforce demographics, your cash reserves, your tolerance for renewal year-over-year swings, and your willingness to take on ERISA fiduciary duties.

The Hidden Costs of Self-Funding Most Brokers Will Not Mention

Brokers selling level-funded and self-funded plans tend to lead with the savings story. There are real costs and risks that deserve equal airtime.

ERISA fiduciary exposure. When you sponsor a self-funded plan, you become an ERISA fiduciary with respect to plan administration. That means you owe participants a duty of loyalty, must act prudently in selecting service providers, and can be personally liable for breaches. Penalties for non-compliance can reach $1,100 per day and are cumulative. Every fiduciary handling plan funds must be covered by a fidelity bond. This is not theoretical. The Department of Labor has stepped up enforcement against employer health plan fiduciaries materially over the last three years.

Form 5500 filings. Self-funded plans with 100 or more participants must file Form 5500 annually with the Department of Labor, including a Schedule A for stop-loss and a Schedule C for service provider compensation. Late filings carry penalties of up to $2,739 per day in 2026.

Loss of state continuation coverage. Most state continuation laws (sometimes called mini-COBRA) only apply to fully-insured plans. If you are too small to be subject to federal COBRA (under 20 employees) and you move from fully-insured to level-funded, terminated employees may lose access to any continuation coverage at all. That can become a real point of friction during layoffs.

Renewal volatility. Because level-funded renewals are based on prior-year claims experience rather than community rates, one bad claim year can produce a 40 percent renewal increase or a non-renewal notice. The carrier is not obligated to keep underwriting a group whose experience has deteriorated. Some employers who saved 20 percent in year one find themselves locked out of the level-funded market and forced back into the fully-insured pool at significantly higher rates after a single high-claim year.

Limited essential benefits. Level-funded plans are not required to cover the full ACA essential health benefits package. Many do, but some shave coverage in areas like applied behavior analysis for autism, fertility treatments, or specific specialty drugs. Read the certificate of coverage before assuming the plan is equivalent to your fully-insured option.

When Each Plan Type Actually Makes Sense

After reviewing the trade-offs, here are the rough decision rules most experienced benefits advisors apply:

Stay fully-insured if:

• Your group has older average age, several chronic conditions, or recent high-cost claims
• You have fewer than 10 enrolled employees and underwriting will likely produce poor pricing
• Your owners cannot tolerate any administrative complexity
• Predictability matters more than capturing upside
• You operate in a state where level-funded plans face regulatory restrictions

Consider level-funded if:

• Your workforce is younger than average and generally healthy
• You have 10 to 200 employees
• You want fixed monthly cash flow but also want to capture savings in good claim years
• You have a benefits broker who can shop renewals annually if pricing deteriorates
• You can absorb a stop-loss attachment point in the worst case

Consider full self-funding if:

• You have 100 or more covered employees and meaningful cash reserves
• Your CFO or HR director understands ERISA compliance
• You want to design custom plan features (specific exclusions, narrow networks, value-based arrangements)
• You are prepared to file Form 5500, maintain a written plan document, and operate with fiduciary discipline
• Long-term claims reduction strategies (wellness, on-site clinics, direct contracting) are part of the plan

The Bookkeeping Implications Most Owners Miss

The funding model you choose has direct consequences for how health benefits flow through your financial statements, and getting the accounting right matters for tax planning, audit readiness, and any future M&A activity.

Fully-insured premiums are straightforward: book them as a payroll-related expense in the month incurred. The employer share hits operating expenses, the employee share is a payroll deduction that nets against the employer payment.

Level-funded plans look like a single line item on bank statements but have at least three economic components inside that payment: administrative fees, stop-loss premium, and a claims fund deposit. Some accountants book the entire amount as health insurance expense each month. Others (more conservatively) book the claims fund portion as a prepaid asset and recognize it as expense when claims are actually paid, then reverse the prepaid against the year-end surplus refund. The second approach is more defensible under accrual accounting but requires year-end reconciliation. Talk to your CPA about which treatment fits your situation.

Self-funded plans require even more granular tracking. Claims paid are an expense in the period incurred. Stop-loss recoveries are a contra-expense or other income. Administrative fees are a separate operating expense. Stop-loss premium is paid annually but should be amortized monthly. Reserves for incurred but not reported (IBNR) claims should be accrued at year end, typically calculated as one to two months of average claims for groups in the 100 to 500 employee range. If you skip the IBNR accrual, your financial statements will systematically understate health benefits expense by 8 to 17 percent.

Whichever model you choose, keep the underlying detail organized. The biggest mistake we see is small employers who lump everything into a single "Health Insurance" account, then have no ability to analyze claims trend, broker fees, or stop-loss recoveries when renewal time comes. The data has to be there if you want to negotiate from a position of knowledge.

Practical Steps for Evaluating a Funding Switch

If your renewal lands and the increase is unacceptable, here is the sequence most benefits brokers will (or should) walk you through:

1. Pull two to three years of claims data from your incumbent carrier. For groups over 50 employees, this should be available as a Summary Health Information form. For smaller groups, it may require a specific request.
2. Anonymize and submit for level-funded quotes from three or four carriers. Quotes typically take two to four weeks. Expect a "decline to quote" from at least one carrier; that is normal underwriting behavior.
3. Compare the all-in cost including expected claims, fixed fees, stop-loss premium, and an estimate of the worst-case stop-loss attachment.
4. Model the cash flow for the base case, expected case, and worst-case scenarios over three years, not one. A one-year savings number can be misleading if year two renews at +25 percent.
5. Review the contract language on stop-loss specifically. Pay attention to lasering (the practice of carving out specific high-cost individuals from coverage at renewal), run-out provisions for claims incurred but not yet paid, and the carrier's right to non-renew.
6. Confirm ERISA fiduciary capacity. Make sure someone on your team can serve as plan administrator with the time and training to take it seriously, or budget for a third-party fiduciary service.
7. Set decision criteria in advance for when you would switch back to fully-insured. If your level-funded renewal exceeds the fully-insured market by 5 percent, do you stay or leave? Decide this when you are not under pressure.

Keep Your Benefits Numbers Clean from Day One

Choosing the right health plan funding model is one of the highest-leverage decisions a small employer will make, but capturing the savings depends on having accurate, granular financial records that show what you are actually paying for and what you are getting back. Beancount.io provides plain-text accounting that gives you complete transparency over every premium payment, stop-loss recovery, claims fund deposit, and surplus refund, with no black boxes between you and your data. Get started for free and see why finance professionals and operators are choosing plain-text accounting to keep their benefit costs (and every other line item) under control.