For self-funded employers, stop-loss insurance is one of the most critical—and often misunderstood—components of a benefits strategy. Selecting the wrong contract structure can lead to unexpected claim exposure, funding gaps, or unnecessary cost.
Understanding the differences between contract types such as 12/12, 24/12, and 12/15 is essential for making informed decisions and properly managing risk.
What Is Stop-Loss Insurance?
Stop-loss insurance protects self-funded employers from large or catastrophic claims by limiting their financial exposure.
There are two key components:
- Specific Stop-Loss – protects against high-cost individual claims
- Aggregate Stop-Loss – protects against total claims exceeding expected levels
However, the contract structure determines when claims are covered, which is where many employers run into issues.
Understanding the Contract Types
12/12 Contract (Incurred / Paid in 12 Months)
A 12/12 contract covers:
- Claims incurred during the policy year
- Claims paid within the same 12-month period
Advantages:
- Clean, simple structure
- Aligns closely with the plan year
- Easier to administer and reconcile
Considerations:
- Claims incurred late in the year may not be paid in time to be reimbursed
- Potential for “runout” gaps if not carefully managed
24/12 Contract (Run-In Coverage)
A 24/12 contract covers:
- Claims incurred in the prior 12 months (run-in)
- Claims paid during the current 12-month policy period
Advantages:
- Eliminates prior-year claim exposure when transitioning to self-funding
- Provides a smoother entry into a self-funded plan
Considerations:
- Typically higher upfront cost
- Often used only in the first year of self-funding
12/15 Contract (Extended Run-Out)
A 12/15 contract covers:
- Claims incurred during the 12-month policy period
- Claims paid up to 15 months
Advantages:
- Provides additional time for claims to be processed and reimbursed
- Reduces risk of unpaid late-year claims
Considerations:
- Slightly higher premium than 12/12
- Requires careful evaluation of cost vs. risk tolerance
Why Contract Structure Matters
The difference between these contracts is not just technical—it directly impacts:
- Employer financial exposure
- Cash flow and reserves
- Renewal positioning and underwriting
- Risk of uncovered claims
A poorly structured contract can result in:
- Claims falling outside coverage periods
- Unexpected liabilities
- Misalignment between plan funding and reimbursement
Key Strategic Considerations
- Know Your Claims Pattern
Understanding when claims are incurred and paid is critical. Employers with slower claims processing may benefit from extended run-out provisions.
- Evaluate Your Risk Tolerance
Lower-cost contracts may carry higher risk. The goal is not just to minimize premium—but to align coverage with your financial strategy.
- Consider Your Funding Strategy
The appropriate contract depends on whether you are:
- Entering self-funding for the first time
- Maintaining an existing program
- Transitioning between carriers
- Understand Renewal Implications
Stop-loss contracts play a significant role in underwriting at renewal. Structuring contracts properly can:
- Improve renewal outcomes
- Provide leverage in negotiations
- Reduce volatility
- Don’t Overlook Large Claim Impact
High-cost claimants and shock claims can distort results. Proper contract alignment helps ensure those claims are handled within the intended coverage period.
Common Pitfalls to Avoid
- Selecting a contract based solely on premium
- Failing to account for claim runout timing
- Not aligning stop-loss with plan year strategy
- Overlooking the impact of large claims on renewal
Final Thoughts
Stop-loss is not just an insurance purchase—it is a risk management strategy.
Employers who take the time to understand contract structures and align them with their broader benefits strategy will:
- Reduce financial risk
- Improve predictability
- Strengthen their position at renewal
Those who do not may find themselves exposed in ways they did not anticipate.
If you’re evaluating your current stop-loss structure—or preparing for renewal—this is an area where a strategic approach can have a significant financial impact.