Stop-loss insurance is the foundation of a viable self-funded health plan. It's what protects your organization from catastrophic individual claims and adverse aggregate experience. But stop-loss contracts are not standardized, and the terms that matter most are often buried in language that reads as routine. This article covers the three contract provisions that catch employers off guard most often — and what to negotiate before you sign.
Understanding the basic structure
Before getting into the danger zones, a quick orientation. A stop-loss contract has two components: specific stop-loss, which covers claims from any single individual that exceed your specific deductible (typically $75,000–$200,000 depending on group size), and aggregate stop-loss, which covers total plan claims that exceed your aggregate attachment point (typically 125% of expected claims).
The stop-loss carrier's exposure is defined by these two limits. Everything below your specific deductible, and everything below your aggregate attachment point, is the employer's financial responsibility. The contract terms that govern exactly what falls above versus below — and exactly when the carrier pays — are where the complexity lives.
Clause #1: The contract period structure (paid vs. incurred)
This is the provision with the largest financial impact and the most potential for surprise. Stop-loss contracts define reimbursable claims by two dates: when the claim was incurred (when the medical service was rendered) and when the claim was paid (when the TPA actually processed the payment). The contract period structure determines which combination governs reimbursement.
A 12/12 contract covers only claims incurred and paid within the same 12-month contract period. This is the most restrictive structure. Claims incurred late in the plan year but not processed until after year-end are not reimbursable — they fall into what's called the "runout" gap.
A 12/15 contract covers claims incurred during the 12-month plan year and paid within 15 months of the contract start. This gives a three-month runout window, which is the most common structure and generally provides adequate protection for normal claims processing cycles.
A 24/12 contract (also called a "run-in" contract) covers claims paid in the current plan year regardless of when they were incurred — including claims from the prior plan year. This is the most favorable structure for employers transitioning from fully insured, because it picks up claims that were incurred under the old plan but haven't been paid yet.
When you move from fully insured to self-funded, there's always a population of claims incurred in the final months of your insured plan that won't be paid until after you've transitioned. Without a run-in provision or specific IBNR (incurred but not reported) protection, these claims become your plan's responsibility — potentially a six-figure liability in your first months of self-funding.
Clause #2: Lasering
Lasering is the stop-loss underwriting practice of applying a higher specific deductible — or outright exclusion — to a named individual who has a known high-cost condition. If your plan has a member currently being treated for cancer, a stop-loss carrier may "laser" that individual by setting their specific deductible at $300,000 instead of your plan's standard $100,000, or by excluding their claims entirely for the first 12 months.
Lasering is legal, and from the carrier's perspective it's rational underwriting. From the employer's perspective, it can significantly alter the financial model — particularly for small-to-mid-size groups where a single high-cost claimant represents a meaningful portion of total expected spend.
There are several ways to manage laser exposure. First, identify likely laser candidates before going to market — your TPA or advisor should be able to flag members with active high-cost conditions from claims history. Second, shop the market broadly; different carriers have different appetites for specific conditions, and some carriers will accept a risk that others laser. Third, negotiate the laser terms — a carrier that insists on a laser may be willing to cap it at a defined amount rather than providing unlimited exclusion.
What you want to avoid is discovering a laser for the first time at renewal, after a bad claims year, when your negotiating leverage has decreased. Laser provisions should be identified, quantified, and addressed before the contract is signed.
Clause #3: Terminal liability
Terminal liability governs what happens to your stop-loss coverage when you leave the carrier — whether at voluntary renewal or because the carrier non-renews you. This is the clause that most employers never read carefully, until they need it.
The scenario that makes terminal liability critical: your plan has an active high-cost claimant — a premature infant in the NICU, a cancer patient mid-treatment, a transplant recipient with ongoing immunosuppressants. At renewal, your stop-loss carrier non-renews you (or significantly increases your premium, effectively forcing you off). Your new carrier excludes or lasers the active claimant. Who pays the ongoing claims for that member?
Without terminal liability protection, the answer may be: your plan, out of pocket, above your old specific deductible and below whatever the new carrier's laser sets. With a terminal liability provision (also called a "run-out" provision), your prior carrier continues to cover that claimant's claims for a defined period — typically 3 to 6 months — after the contract ends, giving you time to transition coverage without a gap.
Not all contracts include terminal liability. Some include it only for an additional premium. Some carriers offer it as a standard feature but with limitations that render it less useful than it appears. Read this clause carefully before signing, and negotiate for the broadest terminal liability language you can get when the carrier relationship is new and your leverage is highest.
What a good bid process looks like
Stop-loss should be competitively bid every year. The market is active, carrier appetites change, and your claims experience creates a new negotiating context annually. A rigorous bid process involves sending your claims data and plan specifications to a minimum of four to six carriers, receiving proposals with fully disclosed terms, and comparing not just premium but all of the provisions above.
The carriers that offer the lowest premium are not always the ones with the best contract terms. A carrier that is 8% cheaper but structures a 12/12 contract while competitors offer 12/15 may cost you significantly more in a year with late-filing claims. The total cost of coverage is a function of premium plus the expected value of contract limitations. Experienced advisors model both.
"The stop-loss contract that looks cheapest at signing isn't always the cheapest one when claims come in. The terms are as important as the price."
— Benefits Collective