What is a stop-loss policy, and do we need one?

Stop-loss insurance is financial protection for employers that assume responsibility for paying healthcare claims under a self-funded health plan.

Unlike traditional health insurance, which provides coverage to employees and their dependents, stop-loss insurance protects the employer against certain unexpectedly high claims expenses.

It's an important part of managing the financial risk associated with self-funding.

How does stop-loss insurance work?

When an employer self-funds its health plan, the organization is responsible for paying eligible medical claims.

Stop-loss insurance helps limit that responsibility by reimbursing the employer for covered claims that exceed specified thresholds.

Those thresholds are called attachment points.

There are two primary types of stop-loss protection.

Specific Stop-Loss

Specific stop-loss protects against unusually large claims associated with a single covered individual.

For example, suppose your policy has a $50,000 specific attachment point.

If one covered individual incurs $200,000 in eligible claims during the applicable coverage period, the employer generally remains responsible for the first $50,000, while the stop-loss carrier reimburses the eligible $150,000 above that threshold, subject to the policy's terms and limitations.

This protection can be especially important when an employee or dependent experiences a catastrophic illness, serious injury, or other high-cost medical event.

Aggregate Stop-Loss

Aggregate stop-loss protects against unusually high total claims across the covered population.

Rather than focusing on one individual, it establishes a threshold for the group's combined eligible claims during a defined period.

If total eligible claims exceed that threshold, the stop-loss carrier reimburses covered amounts above it, subject to the policy's provisions.

Together, specific and aggregate stop-loss can help employers manage both individual catastrophic claims and unexpectedly high overall healthcare spending.

Do fully insured employers need stop-loss insurance?

Generally, no.

With a fully insured health plan, the insurance carrier assumes responsibility for covered claims in exchange for the premiums your organization pays.

Your employer doesn't need a separate stop-loss policy because it isn't directly responsible for funding claims beyond those premiums.

The carrier accounts for its claims risk when determining your insurance rates.

What about level-funded and self-funded plans?

Level-funded plans typically include stop-loss protection as part of the arrangement. The employer makes predictable monthly payments that generally cover expected claims, administrative expenses, and stop-loss premiums.

However, the level of protection and contract provisions can vary significantly.

Traditional self-funded plans generally involve purchasing stop-loss insurance separately. The employer has greater flexibility in choosing attachment points and coverage provisions, but also assumes responsibility for understanding and managing the associated risks.

Although stop-loss insurance isn't universally required by law for self-funded employers, operating without it can create substantial financial exposure.

What should employers evaluate in a stop-loss policy?

Not all stop-loss policies provide the same protection.

Important considerations include:

• Specific attachment point: How much must the employer pay for an individual's eligible claims before reimbursement begins?
• Aggregate attachment point: How much total claims exposure does the employer retain?
• Contract basis: Which claims are eligible for reimbursement based on when expenses are incurred and paid?
• Exclusions and limitations: Are certain claims, conditions, or expenses excluded or subject to special provisions?
• Renewal provisions: Could changes in claims experience affect future attachment points, premiums, or coverage terms?
• Cash flow: How quickly will eligible claims be reimbursed, and can the organization manage expenses while awaiting payment?

These details can materially affect the financial protection a policy provides.

A lower stop-loss premium may appear attractive, but it can come with higher attachment points or more restrictive contract provisions.

Understanding your risk is part of choosing your funding strategy.

At MPOWR, we evaluate stop-loss coverage as part of the broader financial analysis of level-funded and self-funded health plans.

We help employers understand their potential claims exposure, how attachment points affect financial responsibility, and how different coverage arrangements may perform under unfavorable claims scenarios.

The objective isn't simply to find the lowest stop-loss premium.

It's to understand what your organization could be responsible for paying, what protection is available, and whether that level of risk fits your financial resources and long-term benefits strategy.

Stop-loss insurance can make self-funding more financially manageable, but it doesn't make the arrangement risk-free. Knowing where your protection begins—and where your responsibility remains—is essential to making an informed decision.