Shopping group health for your team
When an employer outgrows the fully insured health insurance market, the transition to a self-funded (or self-insured) plan is the defining shift in corporate benefits strategy. In a self-funded arrangement, the company stops paying fixed monthly premiums to an insurance carrier to assume all medical risk. Instead, the employer takes on the claims risk directly, paying for their employees’ medical claims as they occur, using their own corporate funds.
This is not simply a larger group plan; it is a structural transformation of how health benefits are financed and regulated. By assuming the risk, an enterprise gains total visibility into its claims data, escapes state-level insurance mandates and premium taxes, and retains any unspent healthcare dollars at the end of the year. However, this model requires the financial scale to absorb claims volatility, making it a sophisticated financial vehicle designed primarily for mid-market and enterprise employers with 100 to 250 or more employees.
If you are an HR leader, executive, or benefits consultant evaluating coverage for a growing Washington workforce, this guide will unpack the precise mechanics of self-funding, the regulatory advantages, the role of stop-loss insurance, and how to determine if your enterprise has the risk tolerance to execute this transition successfully.
To understand self-funding, you must first contrast it with the traditional fully insured model.
In a fully insured plan, a company with 500 employees pays a massive, fixed monthly premium to an insurance carrier. In exchange, the carrier takes on 100% of the risk. If those 500 employees have a historically healthy year with very few major medical events, the carrier keeps the surplus premium as profit. The employer sees none of those savings. Conversely, if claims exceed premiums, the carrier absorbs the loss—but they will inevitably recoup that loss by drastically raising the employer’s rates at the next renewal.
In a self-funded plan, the employer dismantles that black box. The company establishes a dedicated trust or bank account to fund health benefits. Rather than purchasing a comprehensive risk policy, the employer unbundles the components of health insurance and purchases them piecemeal:
Nationally, approximately 65% of covered workers are enrolled in a plan that is partially or completely self-funded, a figure that continues to climb as employers seek to reclaim control over their second-largest operating expense behind payroll.
The primary financial argument for self-funding is the elimination of carrier risk charges and profit margins. A fully insured premium is loaded with administrative fees, state premium taxes, risk margins, and carrier profit. In a self-funded environment, your fixed costs (TPA fees, network access fees, stop-loss premiums) typically account for only 15% to 25% of your total healthcare budget. The remaining 75% to 85% is variable—it is only spent if claims are actually filed.
This creates a distinct cash-flow advantage. The employer holds onto their capital throughout the year, earning interest, until it is needed to satisfy a claim. If the group has a low-utilization year, the variable funds simply remain in the employer’s general ledger.
The most common misconception regarding self-funding is that one catastrophic medical event—such as a premature birth requiring months in a Neonatal Intensive Care Unit (NICU), or a complex oncology treatment—could bankrupt the company. In reality, no competent benefits consultant would place an employer into a self-funded arrangement without securing rigorous stop-loss insurance.
Stop-loss is not health insurance; it is a financial risk-transfer product that protects the employer. It functions as the safety net, activating only when claims breach specific thresholds known as attachment points. There are two primary types of stop-loss protection, and most self-funded plans purchase both.
Specific stop-loss protects the employer against catastrophic claims incurred by any single plan participant. When the employer purchases the policy, they select a specific deductible (the attachment point)—for example, $100,000.
If an employee requires an organ transplant that ultimately costs $850,000, the employer is only responsible for the first $100,000 in claims. Once the specific deductible is met, the stop-loss carrier reimburses the employer for the remaining $750,000. The specific deductible an employer chooses is heavily dependent on the size of the company; a 1,500-employee enterprise might comfortably absorb a $250,000 specific deductible, whereas a 150-employee company might need to set it at $50,000 to protect their cash flow.
While specific stop-loss protects against the severity of a single claim, aggregate stop-loss protects against an unusually high frequency of smaller, everyday claims across the entire employee population.
During the underwriting process, the stop-loss actuary evaluates the group’s demographics and claims history to calculate an expected total claims target for the year. The aggregate attachment point is typically set at 125% of those expected claims. If an unusually severe flu season and a spike in elective surgeries cause the total, plan-wide medical claims to exceed 125% of projections, the aggregate stop-loss policy reimburses the employer for every dollar spent above that ceiling. This creates a known maximum financial liability for the plan year, allowing CFOs to budget with certainty.
When transitioning to a self-funded plan, HR leaders must be prepared to navigate stop-loss underwriting vocabulary.
Lasering: If your current employee population includes someone with a known, ongoing catastrophic condition—such as a member undergoing active treatment for late-stage cancer—the stop-loss carrier will not want to absorb that guaranteed loss. Instead of denying coverage or spiking the stop-loss premium for the whole company, they will “laser” that individual. This means the carrier assigns a higher, separate specific deductible solely for that one member (e.g., $300,000 instead of the standard $100,000). The employer must then budget for the increased risk exposure on that specific individual.
Corridor Deductibles: In some arrangements, stop-loss carriers require an additional buffer before reimbursing claims. An aggregating specific deductible (often called a corridor) requires the employer to pay a certain amount out-of-pocket above the standard attachment points before the stop-loss kicks in. It is a lever used to lower the upfront fixed premium of the stop-loss policy.
Because medical billing is notoriously slow, a claim is rarely paid in the same month the medical service was rendered. This creates complex timing issues for stop-loss contracts. The industry uses a fractional shorthand to describe when a claim must be incurred and when it must be paid to qualify for stop-loss reimbursement.
Selecting the right contract duration is critical. A mismatch between when an employee receives care and when the provider submits the bill could leave the employer entirely exposed without stop-loss protection.
One of the most powerful strategic levers of a self-funded plan is its legal structure. Fully insured plans issued in Washington are heavily regulated by the Washington State Office of the Insurance Commissioner (OIC). The OIC mandates that state-regulated policies cover specific treatments, therapies, and conditions. Furthermore, if your company has offices in multiple states (e.g., Washington, Oregon, and Idaho), a fully insured setup requires you to manage discrete, state-specific policies governed by different, often conflicting state mandates.
Self-funded plans operate under an entirely different legal framework: the Employee Retirement Income Security Act of 1974 (ERISA).
Under federal law, ERISA preempts state insurance regulations. Because the employer is acting as the insurer of its own plan, the plan is subject to federal oversight (principally by the Department of Labor), not state oversight. This grants the enterprise immense freedom in plan design:
The defining difference between a successful self-funded plan and an operational disaster is the quality of the administration. The employer holds the money, but they do not adjudicate the claims. They must outsource this to an administrator.
An independent TPA is a specialized firm whose sole function is to manage self-funded plans. They receive claims from providers, verify patient eligibility, apply the plan’s specific rules (which they helped you write into the Summary Plan Description), and instruct the employer on how much money to wire to fund the weekly claims batch.
Independent TPAs are highly prized for their flexibility. Because they are not an insurance carrier, they do not force you into a bundled product. An independent TPA allows the employer to plug-and-play different vendors—choosing one network for provider access, a different vendor for pharmacy benefits, and a third vendor for wellness programs.
Alternatively, many employers prefer the seamless employee experience of an ASO arrangement. In an ASO, a major, recognizable insurance carrier (for example, Premera Blue Cross, Kaiser Permanente, or Wellpoint Washington) acts as your TPA.
To the employee, nothing looks different. They carry an ID card with a recognizable blue logo or major carrier brand. When they visit a doctor, the doctor recognizes the carrier and submits the claim through traditional channels. The carrier utilizes its massive, established provider network and proprietary processing systems to adjudicate the claim. The only difference happens behind the scenes: when it is time to pay the doctor, the carrier draws the funds from the employer’s bank account, not their own risk pool.
ASO arrangements offer exceptional network stability and lower employee disruption, but they often restrict an employer’s ability to carve out custom pharmacy solutions or aggressive cost-containment vendors.
| Feature | Fully Insured Plan | Self-Funded (ASO) | Self-Funded (Independent TPA) |
|---|---|---|---|
| Risk Bearer | The Insurance Carrier | The Employer | The Employer |
| State Mandate Compliance | Must comply with WA OIC mandates | Exempt (ERISA Preempted) | Exempt (ERISA Preempted) |
| Employee Experience | Standard carrier ID card | Standard carrier ID card | TPA ID card (often white-labeled) |
| Vendor Flexibility | None (Carrier bundles all services) | Low to Moderate | Maximum (Complete unbundling) |
| Claims Data Access | Highly restricted / Summary only | Good, but often delayed or formatted by carrier | Total ownership of raw, granular claims data |
Prescription drugs, particularly specialty pharmaceuticals for conditions like rheumatoid arthritis, multiple sclerosis, and oncology, are the fastest-growing cost driver in enterprise health plans. In a fully insured plan, pharmacy benefits are bundled into the medical policy. In a self-funded arrangement, the employer has the right to decouple the pharmacy benefits and manage them independently—a strategy known as a “carve-out.”
To manage a carve-out, the self-funded plan contracts directly with a Pharmacy Benefit Manager (PBM). The PBM negotiates discounts with retail pharmacies and extracts rebates from drug manufacturers in exchange for placing their drugs favorably on the plan’s formulary (the list of covered drugs).
Because self-funded plans own their data, HR and finance teams can demand highly transparent contracts from their PBMs. Traditional PBM contracts often employ “spread pricing”—charging the employer $100 for a drug while only reimbursing the pharmacy $60, keeping the $40 spread as invisible profit. Sophisticated self-funded plans demand pass-through pricing models, ensuring they pay exactly what the pharmacy receives, plus a flat administrative fee. Furthermore, the employer can demand that 100% of the manufacturer rebates be returned to the plan’s trust account to offset overall costs, rather than allowing the PBM to pocket a percentage.
The most transformative long-term advantage of self-funding is data ownership. Fully insured carriers notoriously guard claims data, providing employers only aggregated summaries to justify rate increases. Without granular data, an employer cannot intelligently address the root causes of their healthcare spend.
In a self-funded plan, the employer owns their claims data. Through their TPA or a dedicated analytics vendor, the executive team can review de-identified data to spot precise cost drivers.
If the data reveals a massive spike in emergency room utilization for non-emergent issues on weekends, the employer can proactively design a zero-dollar copay telemedicine program and launch an internal communications campaign. If claims analysis shows an unusually high incidence of unmanaged Type 2 Diabetes leading to costly inpatient admissions, the HR team can carve out a specialized, proactive diabetes management vendor to intervene before employees face catastrophic complications. Self-funding changes the HR role from a passive buyer of insurance to an active manager of population health.
With the freedom of ERISA comes a heightened level of fiduciary responsibility. When a company self-funds, it essentially becomes an insurance entity in the eyes of the federal government. The executive team, acting as plan fiduciaries, must operate the plan in the exclusive best interest of the participants.
A self-funded employer must navigate complex federal reporting:
Once a company is firmly established in a self-funded framework and has mastered the basics of TPA administration and stop-loss management, they can deploy advanced cost-containment strategies that are fundamentally impossible in the fully insured market.
Traditional health plans rely on PPO networks, where the carrier negotiates a percentage discount off a hospital’s billed charges. The flaw in this model is that the hospital can unilaterally inflate its master charge sheet, rendering a 40% discount meaningless.
Reference-Based Pricing abandons the traditional PPO network entirely for facility charges. Instead of negotiating down from a hospital’s arbitrary billed charge, the plan builds the payment up from a known, transparent metric: Medicare. An RBP plan might dictate that it will pay any hospital in the country exactly 150% of the standard Medicare reimbursement rate for a given procedure. This injects radical transparency and predictability into the cost of major medical events. However, it requires significant employee education and legal support from the TPA, as hospitals may occasionally attempt to “balance bill” the patient for the remainder of their exorbitant sticker price.
To lower high-cost downstream claims (like emergency room visits and chronic disease complications), enterprise self-funded employers frequently sponsor Direct Primary Care models. The employer contracts directly with a primary care group—or builds a near-site clinic exclusively for their employees. Employees enjoy unlimited access to primary care, longer appointments, and basic lab work at zero out-of-pocket cost. Because the employer is paying for these primary care services directly out of their general operating budget via a flat monthly subscription, they bypass the traditional claims processing infrastructure entirely.
For high-cost, high-variance procedures (like joint replacements, spine surgery, or organ transplants), outcomes and costs vary wildly between local community hospitals. A self-funded plan can carve out these specific procedures and contract directly with renowned Centers of Excellence—elite surgical centers with pristine outcome records and transparent, bundled pricing. The employer will often waive the employee’s deductible and cover all travel costs to incentivize the employee to use the COE. The employer saves money through the bundled rate, and the employee avoids the complications and readmissions common at lower-tier facilities.
The transition to a self-funded plan is a multi-month operational project; it is not a switch flipped at a typical Q4 renewal.
An enterprise considering the move should begin the feasibility analysis six to nine months prior to their renewal date. The process requires pulling detailed demographic data and whatever utilization summaries the current carrier will release. The broker or benefits consultant will run actuarial models to project expected claims and worst-case scenarios.
If the financial modeling is favorable, the employer will draft a Request for Proposal (RFP) to market the plan to TPAs, stop-loss carriers, and PBMs.
The most critical financial consideration during this transition is the concept of IBNR (Incurred But Not Reported) reserves. In the first year of self-funding, cash flow often looks exceptionally positive in the first few months. This is an illusion caused by the billing lag. Employees are incurring claims in January, but the TPA won’t process and bill the employer for those claims until March or April. The employer must aggressively hold back the first quarter’s budget into a reserve account to build the necessary capital to pay claims as the volume normalizes later in the year.
Furthermore, if the employer ever decides to leave the self-funded environment and return to a fully insured plan (or close the business), they must manage the “run-out” tail—the months of lingering claims that will continue to trickle in after the self-funded plan has officially terminated.
Self-funding is the gold standard for enterprise benefit design, but it requires specific corporate conditions to succeed. It is not an appropriate strategy for companies facing severe cash-flow crunches, high employee turnover, or a lack of internal HR sophistication.
To determine if your enterprise is ready for true self-funding, evaluate the following prerequisites:
Our licensed consultants can help you analyze your workforce data, model your specific risk, and structure a custom stop-loss strategy.
Get a Free ConsultationIf your organization has outgrown the restrictions of off-the-shelf carrier products, evaluating a self-funded architecture is the mandatory next step in corporate financial maturity. The ability to sever state mandates, eradicate premium taxes, own your claims data, and actively bend the trend of your healthcare spend provides an operational advantage that fully insured competitors simply cannot match.