The Section 125 Open Enrollment Checklist
Every HR Manager Needs

Open enrollment is chaotic enough without adding a new benefit to the mix. But if you're planning to introduce a Section 125 preventive healthcare plan this season, timing it around open enrollment is actually the smartest move you can make. This checklist walks HR managers through exactly what to do — from 90 days out through the first payroll cycle after launch — so nothing falls through the cracks.

Why Open Enrollment Is the Ideal Launch Window

Most employers try to bolt on a new pre-tax benefit mid-year, which creates unnecessary friction: employees are confused about why they're suddenly seeing a new deduction, payroll has to build a separate mid-cycle process, and HR fields dozens of one-off questions. Open enrollment solves all of that. Employees already expect to review and elect benefits during this window, which means a Section 125 preventive plan can be folded directly into your existing enrollment materials instead of feeling like a surprise.

There's also a compliance advantage. The IRS generally requires cafeteria plan elections to be made prospectively and locked in for the plan year, with changes permitted only for qualifying life events. Launching during open enrollment keeps your election timing clean and defensible, which matters if your plan is ever reviewed. You can read the IRS's underlying framework for cafeteria plans directly at IRS Publication 15-B, which covers the tax treatment of fringe benefits including Section 125 arrangements.

90 to 60 Days Out: Eligibility and Plan Design Prep

The single most important early step is confirming eligibility. To implement a Section 125 preventive healthcare plan through Benefits TaxShield, a business needs a minimum of 30 W-2 employees. If you're close to that threshold, now is the time to confirm your headcount using payroll records rather than estimates — part-time and seasonal staff on W-2s typically count toward this minimum, but the specifics should be confirmed with your provider.

Once eligibility is confirmed, this is also the window to finalize plan design decisions: which preventive care categories will be included, how the plan document will be structured, and how it will coordinate with your existing major medical, dental, and vision offerings. Because implementation typically takes about four weeks from signed agreement to live payroll deductions, starting this conversation 60-90 days before your enrollment period gives you comfortable breathing room without rushing the plan document review.

This is a good moment to run your numbers through the savings calculator so you have concrete figures to bring into budget conversations with your CFO or finance team before enrollment materials are finalized.

45 to 30 Days Out: Building the Communication Plan

A Section 125 preventive plan only delivers value if employees actually understand and enroll in it. Poor communication is the number one reason participation rates disappoint. Build a simple three-touch communication plan: an initial announcement explaining what the benefit is and why it's being added, a mid-window reminder with a real paycheck example, and a final week reminder with a clear deadline.

Avoid burying this benefit inside a 40-page enrollment guide. Employees respond best to plain language: "This plan can lower the amount of your paycheck subject to Social Security and Medicare tax, which typically means a small increase in your take-home pay, at no cost to you." Skip the jargon about cafeteria plans and IRC Section 125 in your first message — save the technical detail for a follow-up FAQ document.

The Society for Human Resource Management has published extensive research showing that benefits communication timing and clarity directly affect enrollment and satisfaction rates — worth reviewing at SHRM.org if you want deeper guidance on structuring enrollment messaging for a multi-generational workforce.

Enrollment Week: The Day-by-Day Checklist

During the actual enrollment window, HR teams do best with a concrete sequence rather than a vague "get the word out" plan. Use this order:

Day 1: Send the official announcement email and post materials to your benefits portal or intranet. Day 3-4: Hold a short virtual or in-person info session for questions — even a 15-minute session dramatically reduces one-off emails to HR. Midpoint: Send a reminder with a worked paycheck example (see below) and confirm the enrollment deadline. Final 48 hours: Send a last-call reminder to anyone who hasn't submitted an election, and confirm your payroll system is configured to reflect the new pre-tax deduction category starting with the first pay period of the new plan year.

Here's the kind of concrete example that resonates with employees far more than abstract percentages: a 150-employee company adding a Section 125 preventive plan at an average savings of $680 per employee per year would see roughly $102,000 in aggregate annual payroll tax savings for the employer alone, while employees also see their own FICA-taxable wages reduced, translating into a modest but real paycheck increase. Numbers like this — both the company-wide total and the individual employee impact — tend to drive stronger participation than a generic benefits description.

Post-Enrollment: The Compliance Follow-Through

Once elections are locked in, the checklist isn't finished — three follow-up tasks are easy to overlook. First, confirm your payroll provider has correctly coded the new pre-tax deduction so it reduces wages for federal income tax, Social Security, and Medicare withholding as intended, and reflects properly on year-end W-2 reporting. Second, schedule your plan's nondiscrimination testing before the plan year progresses too far, since cafeteria plans must satisfy IRS eligibility and benefits tests to maintain their tax-favored status. Third, document your enrollment process itself — retain copies of the announcement materials, the plan document, and a record of each employee's election — in case of a future audit or dispute.

It's also worth building a simple internal calendar reminder for your next open enrollment cycle now, noting what worked and what didn't. HR teams that treat this as a one-time project instead of an annual, improvable process tend to see participation plateau instead of grow year over year.

Common Enrollment Mistakes That Undercut Participation

The most common mistake is launching the plan with no live support during enrollment week — employees who hit a question with no easy answer will simply skip the election rather than chase down an answer. The second most common mistake is failing to distinguish the preventive plan from other pre-tax offerings like an FSA or HSA in your materials, which creates confusion about whether employees are being asked to contribute their own money versus simply electing a plan that reduces taxable wages at no direct cost to them.

A third mistake is treating the rollout as purely an HR task with no visibility for leadership. When a CFO or department head can speak to the plan's value in a team meeting, participation improves because employees see it as endorsed rather than just another form to sign. Bringing finance into the loop early — using calculator projections as a talking point — helps make that happen.

Getting the checklist right turns open enrollment from a compliance chore into a genuine value-add for both the company and its workforce. If you want a partner to help build your enrollment materials, confirm eligibility, and manage the compliance side of a new Section 125 preventive plan, our team can walk through the full four-week implementation timeline with you.