Case Study: Self-Funded with Stop-Loss—How a Manufacturer Saved 18%

By Taylor Benefits Insurance — anonymized client details. Results verified against carrier/TPA reports.

Executive summary

A mid-market U.S. manufacturer (we’ll call them Ridgeway Components) replaced a rising-cost fully insured plan with a self-funded health plan wrapped in stop-loss. In year one they cut total health spend by 18% without reducing access to care. Savings came from a tighter network, smarter pharmacy contracting, steerage to appropriate sites of care, and real plan literacy during open enrollment—not from shifting costs to employees. Just as importantly, leadership gained claims transparency to manage the drivers of trend going forward.

Company profile

• Industry: Industrial manufacturing (precision metals)

• Headcount: 240 benefits-eligible employees, 310 total lives covered (with dependents)

• Locations: One main plant + two small satellite facilities across two states

• Workforce mix: Skilled trades, machine operators, shift supervisors, small corporate office

• Previous funding model: Fully insured PPO, one option, national carrier

• Annual renewal history: +9–12% for three consecutive years

The problem we were asked to solve

Ridgeway’s fully insured premium had become a budget line item nobody could control or explain. Renewal meetings were a predictable pattern: “Trend is up, unit costs are up, here’s your new premium.” Meanwhile, employees complained about surprise bills and pharmacy costs.

Our brief from the CFO and HR Director was blunt:

1. Reduce the all-in annual spend without cutting coverage.

2. Create cost predictability beyond a one-year teaser rate.

3. Give finance real visibility into what’s driving claims.

Why self-funded with stop-loss

We modeled three paths: stay fully insured (with plan tweaks), move to level-funded, or go self-funded with stop-loss and an independent TPA/PBM. Level-funded would have been an easier cultural leap, but the data suggested Ridgeway could benefit from full self-funding controls with specific and aggregate stop-loss to cap risk.

What convinced leadership:

• Data transparency: Monthly claims feeds and dashboards instead of once-a-year renewal shock.

• Customization: Ability to carve-out pharmacy, steer imaging and infusions, and add nurse navigation.

• Risk protection: Specific stop-loss to cap any one member, aggregate to cap the plan year.

Baseline (the “before” picture)

• Annual fully insured premium: $3.42M

• PEPM (per-employee per month): $1,188

• Plan design: $750 deductible PPO, $30 PCP copay, $50 specialist copay, 20% coinsurance

• Rx trend: Specialty spend 41% of total Rx dollars with 4 members driving 63% of specialty costs

• Site of care: Outpatient surgery center utilization low; hospital outpatient usage high for routine imaging/infusions

• Member literacy: Many didn’t understand deductible vs. out-of-pocket max; ER overuse for non-emergent care

The solution we implemented

1) Stop-loss structure (risk guardrails)

• Specific stop-loss: $85,000 per member, with no new lasers for year one; rate cap negotiated for year two contingent on claims bandwidth.

• Aggregate stop-loss: 125% of expected claims with monthly accommodation.

• Triggers: Weekly high-cost claimant notifications so HR/our nurse partner could intervene early.

2) Network and TPA

• Independent TPA for medical claims, paired with a narrow-plus PPO network in the plant’s primary region.

• Wrap network for traveling/satellite employees.

• Reference-based pricing was considered and rejected to avoid member abrasion in year one.

3) Pharmacy (PBM) strategy

• Transparent pass-through PBM, no spread pricing, full rebate visibility.

• Specialty carve-out channel with site-of-care redirection (infusions to ambulatory centers).

• Copay assistance optimization (without double-dipping) to reduce member OOP and plan net cost.

4) Plan design (no benefits haircut)

We resisted the classic “save by shifting” playbook. Instead of slashing employee benefits, we maintained actuarial value but aligned incentives:

• Two options:

  • HDHP + HSA (employer seeding $750 individual / $1,250 family)

  • PPO-lite with slightly higher deductible than the old plan but zero-dollar preventive, virtual care, and preferred imaging

• Site-of-care steerage: $0 member cost at designated imaging centers; reduced copay for ambulatory infusion/surgery

• Telehealth first: 24/7 virtual PCP and mental health with $0 copay

5) Care navigation & condition management

• Nurse navigation for oncology, MSK (musculoskeletal), and diabetes.

• Centers of Excellence second-opinion program for high-cost surgeries.

• Proactive outreach to members with poor medication adherence.

6) Communication (where savings are won or lost)

• Plain-English open enrollment sessions on each shift, with real “personas” showing total cost of care under each plan.

• Pocket triage cards: “Where to go for care” (telehealth vs. urgent care vs. ER).

• Manager toolkit for supervisors to answer common questions on the floor.

7) Governance & compliance

• ERISA plan document and SPD updated.

• HIPAA BAAs with all vendors.

• COBRA and 1095-C processes verified with the TPA and payroll.

Results after 12 months

Ridgeway finished the plan year 18% under their fully insured baseline, measured apples-to-apples on total employer cost (claims + fixed stop-loss premium + admin fees). Member satisfaction, measured via pulse surveys and ticket volumes to HR, improved.

Where the savings came from (approximate contribution to the 18%):

• Pharmacy optimization: 6.2%

• Site-of-care redirection: 4.1%

• Network & unit cost improvements: 3.7%

• Avoided inappropriate ER visits: 2.0%

• Plan literacy / smarter utilization: 2.0%

Clinical highlights:

• Specialty infusion site moves cut per-infusion costs by 35–47%.

• MSK navigation avoided three low-value imaging sequences and two unnecessary surgeries (second opinions).

• Diabetes adherence improved; A1C control rate rose from 52% to 63%.

Member experience:

• Complaints down 28% vs. prior year, largely due to clearer bills and telehealth access.

• HDHP adoption: 46% chose HDHP thanks to HSA seed and education, reducing PEPM while maintaining protection.

Before/After quick view

Table shows key numeric metrics only. Narrative detail is in the body text above.

What didn’t work (and what we changed)

• Narrow network friction: Two popular orthopedic groups were initially out-of-network; we negotiated single-case agreements and then added a wrap option for MSK without blowing up discount integrity.

• Copay card coordination: A small subset of pharmacy claims didn’t process copay assistance correctly in month one; we tightened the accumulator logic with the PBM.

• HDHP misconceptions: Some employees still equated “high deductible” with “bad plan.” We added salary-band examples showing HSA math (employer seed + tax savings + typical utilization) to clarify the total cost of care.

Risk management: the stop-loss actually mattered

Two high-cost claimants exceeded the $85,000 specific in Q3 and Q4. The stop-loss carrier paid timely, and monthly accommodation under the aggregate smoothed cash flow during a spike in outpatient infusions. We also negotiated renewal corridor protections (no new lasers absent clear medical underwriting triggers), which helped the CFO budget for year two.

Timeline we followed (playbook)

1. Month 0–1 | Feasibility & underwriting
   Census + claims review (24 months), risk scoring, stop-loss marketing, PBM RFP, TPA interview.

2. Month 2 | Final design & contracting
   Network selection, stop-loss binding, PBM and TPA contracts, plan documents drafted.

3. Month 3 | Communication & enrollment
   Shift-based meetings, supervisor toolkit, FAQs, HSA onboarding.

4. Month 4–12 | Operate & optimize
   Monthly reporting, nurse navigation escalations, site-of-care steering, grievance review.

5. Month 10–11 | Renewal planning
   Review specific hits, trend drivers, vendor scorecards; negotiate renewal with stop-loss.

How we measured the 18%

We compared total employer cost year-over-year:

• Fully insured year: carrier premium (medical + Rx)

• Self-funded year: paid claims (medical + Rx) + fixed stop-loss premium + admin fees + care navigation fees

We normalized for membership months (minor census fluctuation) and excluded one-time implementation costs. Finance reviewed each monthly funding and stop-loss reimbursement to reconcile the year.

Is self-funded right for your company? (quick checklist)

• Headcount 75–500 with relatively stable turnover

• Claims volatility manageable or insurable with specific stop-loss in the $60–$125k range

• Willingness to engage employees (education makes or breaks savings)

• Appetite to act on data: steerage, PBM management, COE second opinions

• Leadership alignment on a two-year view (year one savings are great; year two locks in discipline)

If three or more of the above fit, you’re likely a candidate for a structured self-funded move—possibly via level-funded as an intermediate step if culture or systems readiness is a concern.

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Takeaways

Ridgeway’s 18% year-one reduction wasn’t magic. It was methodical execution:

• Guardrails from well-negotiated stop-loss

• Transparent PBM plus site-of-care strategy

• Member education that changed behavior

• Monthly data reviews that drove small, compounding improvements

Self-funding with stop-loss isn’t a silver bullet, but for employers willing to use the levers available to them, it’s often the first time health insurance behaves like a manageable program instead of a mysterious bill.

Considering a move to self-funded with stop-loss?

Taylor Benefits Insurance can run your claims feasibility analysis, market stop-loss, model side-by-side scenarios, and design the communication plan so employees win too.
Let us review your data and see what’s possible.