Our Take
Stop-loss costs are accelerating faster than the market is pricing them, which means self-insured employers will face another round of painful renewals.
Why it matters
Two-thirds of U.S. employers self-insure their health plans and rely on stop-loss insurance to cap exposure. When claims surge this hard, renewal quotes tighten within months, not years.
Do this week
Benefits leaders: audit your 2026 stop-loss quotes against Tokio Marine HCC's 2025 analysis now so you can model 2027 budget impact before Q4 renewal negotiations begin.
Claims jumped 9.5 points above historical averages
Stop-loss insurance claims increased sharply in 2025, outpacing expectations by a significant margin. According to Tokio Marine HCC's 2025 stop-loss experience analysis, specific claims for individual patients with very high medical bills ran 9.5 percentage points above the 2019-2023 average. In 2024, that gap was 5 percentage points. The company's analysts stated they were "undeniably surprised by these trends" (per the Tokio Marine HCC report).
The surge reflects an increase in claim frequency across all severity levels, including catastrophic thresholds. Tokio Marine HCC identified specific drivers: a rise in cancer diagnoses, conditions affecting fetuses and newborns, and transplant cases. Secondary factors include trade tariffs, Medicare Advantage reimbursement cuts, U.S. population aging, higher adoption of GLP-1 weight-loss drugs, and physician shortages.
Market reaction has begun but remains insufficient. Tokio Marine HCC analysts said "the market has begun to react to this ongoing change in cost trend, but will need to continue tightening to reach adequate levels across the stop-loss market." Executives from Cigna and Sun Life Financial have publicly noted that stop-loss costs are still rising, though they believe the rate aligns with the surge that began in mid-2024.
2027 renewal quotes will be comparable to 2026, meaning no relief
Stop-loss insurance protects self-insured health plans from catastrophic claim costs. Approximately two-thirds of U.S. employers that offer health coverage operate self-insured plans, making stop-loss pricing a direct lever on corporate health spend (per HR Executive). When claims accelerate faster than carriers expected, insurers tighten quotes within 12 to 18 months.
The pattern here is clear: 2024 claims ran 5 percentage points hot, and 2025 nearly doubled that gap to 9.5 points. If the market is "tightening" but not yet adequately, that means 2027 renewal quotes will likely hold or rise further. There is no expectation of relief. For self-insured employers, this signals two or three consecutive years of above-trend cost increases with no reset in sight.
Lock visibility and prepare for flat or rising renewals
Benefits leaders should pull Tokio Marine HCC's 2025 analysis now and overlay it against your plan's claims history. Compare your catastrophic claim frequency against the reported baseline. If your plan runs hotter than average on cancer, obstetrics, or transplants, expect sharper renewal increases.
Second, begin conversations with your stop-loss broker and carrier before Q4. Do not wait for renewal notices. Ask whether your 2026 quotes already reflect the 9.5-point gap or whether further tightening is expected. Request a side-by-side of your 2025 and projected 2026 claim trends to build a credible 2027 budget.
Third, evaluate plan design changes now. If your deductible and attachment point were set in a lower-trend environment, they may no longer align with claims reality. Higher frequency claims at catastrophic levels may warrant a modest adjustment to attachment points to offset renewal increases, or additional employer contribution if plan cost-sharing remains fixed.