Open Enrollment Communication: The Definitive Guide for HR Teams

Every fall, HR teams brace for the same cycle. Benefits change, deadlines approach, and employees need to make decisions that affect their health, their finances, and their families. Yet year after year, the same problems show up: low participation, confused employees, and an inbox full of questions HR has already answered a dozen times.

Open enrollment is often treated as an administrative event, something to schedule, track, and close out. But the real challenge isn't logistics. It's communication.

Employees are overwhelmed with information. They receive emails about deductibles, HSAs, dependent coverage, and plan tiers, often all at once, often in language that feels more like a legal document than a helpful explanation. Many simply tune out, or wait until the final days to make a decision under pressure.

At the same time, HR teams are overwhelmed in a different way. They field the same questions repeatedly: "When does enrollment end?" "What changed this year?" "Which plan covers my prescription?" Without a clear communication strategy, HR ends up doing the same work over and over, manually, during the busiest weeks of the year.

Benefits represent one of the largest investments a company makes outside of payroll itself. When communication fails, that investment underperforms, with 75% of employers reporting that workers under-utilize the benefits available to them. Employees pick plans that don't fit their needs, utilization drops, satisfaction suffers, and HR spends weeks fielding avoidable questions instead of focusing on higher-value work.

What is open enrollment communication?

Open enrollment communication is the full set of messages, channels, and touchpoints HR uses to inform, educate, and guide employees through their benefits decisions during the enrollment period. It covers everything from the first announcement that enrollment is coming to the final confirmation that an employee's elections were processed.

It's easy to confuse communication with administration, but they serve different purposes. Enrollment administration is the operational side: processing elections, managing system access, validating dependent information, and handling carrier file feeds. Communication is the human side: making sure employees understand what's happening, why it matters, and what they need to do.

A company can have flawless administrative systems and still see poor enrollment outcomes if the communication is weak. Employees who don't understand their options default to inaction, and inaction during open enrollment usually means missed opportunities, like failing to add a new dependent, skipping an HSA contribution, or staying on a plan that no longer fits their situation.

Why open enrollment communication matters

Strong communication during open enrollment accomplishes several things at once:

• It increases the percentage of employees who actively review and update their benefits rather than passively re-electing the previous year's choices.
• It reduces the volume of repetitive questions HR has to answer one-on-one.
• It improves long-term benefits utilization, since employees who understand their plans are more likely to use them appropriately.
• It builds trust in HR as a resource, rather than a department employees only hear from when something is due.

The downstream cost of poor communication is real. A Forbes study found that four in ten employers believe that employees leave their organization to find better benefits elsewhere. In many cases, those employees may have had access to competitive benefits; they just never fully understood them.

Goals of open enrollment communication

Most communication strategies should be built around a few core goals:

• Awareness — make employees aware that enrollment is happening and what's at stake.
• Education — educate employees on what has changed and what their options mean.
• Action — drive employees to log in, review their elections, and submit on time.
• Confirmation — confirm that elections were received and processed correctly.
• Follow-up — follow up on any missing steps, documentation, or unresolved questions.

These five goals form a natural arc. Most enrollment communication plans fail not because they skip a goal entirely, but because they spend too much time on one (usually awareness) and not enough on the others.

Common challenges HR teams face

A few challenges show up across nearly every organization, regardless of size or industry:

• Limited internal bandwidth to write, design, and schedule a full communication campaign on top of regular HR work.
• Employee populations with different needs, including remote workers, hourly employees without regular email access, and multi-generational teams with different communication preferences.
• Pressure to keep messaging simple while still covering legally required plan details.
• A short enrollment window that doesn't leave room for re-explaining things employees missed the first time.

Understanding these challenges is the first step toward building a plan that accounts for them, rather than one that assumes employees will read every email in full the moment it lands.

Why open enrollment communication often fails

When open enrollment communication fails, it's not because HR teams don't care. It's because the structure of the communication works against the goal of getting employees to engage. Here are the most common ways it can happen.

Employees receive too much information

When HR tries to cover everything at once, from plan changes to cost comparisons to deadlines to FAQs, employees often disengage before they reach the part that matters most to them. Dense, all-in-one communications tend to get skimmed or skipped entirely, especially on mobile devices.

Communications start too late

Many organizations don't begin messaging until enrollment officially opens. As a result, employees have no runway to think through decisions, ask questions, or compare options. Late communication compresses a weeks-long process into a rushed, last-minute scramble.

Only one email is sent

A single announcement email, no matter how well written, can't carry the full weight of an enrollment period. Employees miss emails, delete them, or forget the details by the time they sit down to enroll. Communication needs to be repeated and reinforced across multiple touchpoints, not delivered once and assumed to stick.

Messaging isn't personalized

A new hire, a parent adding a dependent, and a long-tenured employee all have different information needs. Generic, one-size-fits-all messaging forces employees to dig through information that doesn't apply to them, which increases the chance of them missing the information that does.

HR spends too much time answering the same questions

Without a strong self-service layer, like an FAQ resource, a benefits portal, or a chatbot, HR ends up answering the same handful of questions dozens or hundreds of times. This isn't just inefficient. It's a sign that the upfront communication didn't fully address what employees needed to know in the first place.

This is where year-round, automated communication tools become valuable. Instead of HR manually repeating answers every cycle, a platform like OneBenefits can handle repetitive questions and keep employees engaged with their benefits long after enrollment closes, not just during the few weeks when decisions are due.

The ideal open enrollment timeline

A strong open enrollment communication plan doesn't start the week that enrollment opens. It starts roughly two to two and a half months out, with each phase building toward the next.

8 to 10 weeks before enrollment

Goals:

• Finalize any benefit plan changes with carriers and leadership.
• Build the overall communication plan, including channels, cadence, and owners.
• Segment your employee audience based on role, location, and benefit needs.
• Prepare FAQ content addressing likely questions before they're asked.

Deliverables:

• A documented open enrollment communication strategy.
• Initial messaging to employees letting them know enrollment season is approaching.

This phase is about preparation, not employee-facing volume. The goal is to have a plan in place before the clock starts ticking.

6 weeks before: open enrollment announcement

This is when the formal open enrollment announcement goes out. It should come from leadership or HR leadership to signal importance, and it typically includes:

• The official enrollment window (start and end dates).
• A high-level summary of what's changing this year.
• Where employees can go for more information.

Many organizations build a short teaser campaign ahead of the full announcement, including save-the-date emails or a brief note from leadership that enrollment is coming soon. This primes employees to pay attention when the full announcement lands instead of treating it as just another email.

4 weeks before: education phase

This is the heaviest content phase. Topics should include:

• A clear breakdown of benefit changes from the previous year.
• Side-by-side plan comparisons to help employees evaluate options.
• Live or recorded webinars walking through plan details and answering questions.
• FAQ documents covering the most common concerns by employee segment.

This phase should give employees enough information to make an informed decision without overwhelming them. Breaking education content into smaller, focused pieces (one plan change per email, for example) tends to perform better than a single comprehensive document.

2 weeks before: reminder campaign begins

This is where open enrollment reminders start in earnest. Reminders should be shorter and more action-oriented than education content, since the goal now is to drive action, not deliver new information. Effective formats include:

• Countdown emails noting how many days remain.
• SMS reminders for fast, high-visibility nudges.
• Manager talking points so leaders can reinforce the message during team meetings.

Enrollment week

During the final week, communication should shift to a daily cadence. Examples include:

• Final reminder emails as the deadline approaches.
• HR office hours for employees who want live support.
• Chatbot support for after-hours questions.
• Deadline countdowns across email, SMS, or the benefits portal.

The goal here is urgency without panic. Employees should feel like there's still time to act, but no doubt about when that time runs out.

After enrollment closes

Communication shouldn't stop the moment the deadline passes. This phase should include:

• Confirmation emails verifying each employee's elections.
• Clear next steps for anything still outstanding.
• Follow-up on missing documentation, such as dependent verification.
• The start of ongoing benefits education that carries through the rest of the year.

This final phase is often the most overlooked, but it's where trust gets built or lost. Employees who don't receive confirmation are left wondering whether their elections actually went through, which generates more support tickets than almost any other part of the process.

How to build an open enrollment communication plan

A strong OE communication strategy doesn't need to be complicated, but it does need structure. The following five steps give HR teams a repeatable framework they can use every cycle.

Step 1: Define communication goals

Before writing a single email, get clear on what you're trying to achieve. Common goals include:

• Increasing active participation rather than passive re-enrollment.
• Reducing the volume of HR questions during the enrollment window.
• Improving employee understanding of plan changes and options.

Your goals should shape everything downstream, including which channels you prioritize and how you measure success at the end.

Step 2: Segment your audience

Not every employee needs the same message. Common segments include:

• New hires, who need foundational education since they haven't been through enrollment with your company before.
• Employees with families, who need information about dependent coverage and plan comparisons.
• Remote employees, who may need different channels or timing than in-office staff.
• Executives, who often want a higher-level summary rather than granular detail.
• Hourly workers, who may have limited email access and benefit more from SMS or in-person communication.

Segmenting doesn't mean writing entirely separate campaigns for every group. Often it means adjusting subject lines, emphasis, or channel mix based on what each group needs to know. Generational differences are also worth taking into account here: 42% of Gen Z employees say they feel little to no understanding of their company's benefits, a gap that doesn't close without deliberate outreach tailored to how that group consumes information.

Step 3: Identify key messages

Every piece of enrollment communication should tie back to a small set of core messages:

• What's changing this year.
• What's staying the same (which reassures employees who don't need to take action).
• What action, if any, is required.
• When the deadline is.

Keeping these four points consistent across every channel reduces confusion and reinforces the message through repetition.

Step 4: Choose communication channels

Different messages perform better on different channels. A reminder works well as a short SMS message; a detailed plan comparison works better as an email or portal resource. The next section covers this in depth, but the planning step here is simply deciding which channels you'll use for which type of message.

Step 5: Build your communication calendar

Once goals, segments, messages, and channels are defined, map them onto a calendar. This calendar should specify what goes out, to whom, through which channel, and on what date, ideally mirroring the timeline outlined earlier in this guide. Having this mapped out in advance means HR isn't writing and sending messages reactively during the busiest weeks of the cycle.

The best multi-channel open enrollment communication strategy

A single email cannot carry the full weight of open enrollment communication. Employees are spread across different habits, devices, and attention spans, and a multi-channel approach reaches them where they're actually paying attention.

Email

Email remains the primary channel for open enrollment communication, particularly for:

• Educational campaigns that require more detail and context.
• Personalized messaging tailored to specific employee segments.
• Anything employees may need to reference later, since email creates a searchable record.

SMS

SMS is best suited for short, high-urgency messages, including:

• Deadline reminders.
• Last-minute urgent announcements.
• Quick nudges that don't require a full email to explain.

Open rates on SMS are typically much higher and faster than email, which makes it a strong complement for time-sensitive messages.

Benefits portal

A centralized benefits portal acts as the enrollment hub where employees can go for:

• Self-service FAQs.
• Plan documents and comparison resources.
• A single source of truth that doesn't depend on finding the right email in a crowded inbox.

Chatbots

Chatbots have become one of the most effective additions to an open enrollment communication strategy, since they offer:

• 24/7 answers outside of HR's regular working hours.
• A meaningful reduction in repetitive HR emails.
• Instant support for employees who want an answer immediately rather than waiting for a reply.

Video

Short videos can make dense benefits information easier to absorb. Potential videos include:

• A general benefits overview covering plan structure.
• A welcome message from HR setting the tone for the enrollment period.
• Walkthroughs of specific plans or tools, like how to use the enrollment portal.

Manager enablement

Managers are an underused communication channel. When equipped properly, they can reinforce HR's messaging directly within their teams. Equip managers with:

• Talking points they can use in team meetings.
• Short meeting slides summarizing key dates and changes.
• A simple FAQ they can reference if employees ask questions on the spot.

When managers are left out of the loop, employees often turn to them with questions anyway, and an unprepared manager can unintentionally spread incorrect information.

Common open enrollment communication mistakes

Even well-intentioned HR teams fall into a few recurring traps. Recognizing them is the first step to avoiding them.

Waiting until enrollment starts

Starting communication on day one of enrollment leaves no time for awareness or education to build. By the time employees fully register that enrollment is open, a meaningful portion of the window has already passed.

Sending too many generic emails

Volume without relevance trains employees to ignore HR emails altogether. A high cadence of generic, undifferentiated messages is often less effective than fewer, more targeted ones.

Ignoring mobile users

A large share of employees will open enrollment emails on their phones. Long paragraphs, dense tables, and small text that work fine on desktop can become unreadable on mobile, which leads employees to abandon the message before they reach the action they're supposed to take.

Not personalizing messages

Sending the same message to every employee regardless of role, family status, or location forces people to mentally filter out what doesn't apply to them, which increases the chance they miss what does.

Forgetting managers

When managers aren't briefed, they can't reinforce the message, and in some cases they end up fielding questions they're not equipped to answer accurately.

No reminder strategy

A single announcement followed by silence until the deadline gives employees no reason to act early. Without a structured open enrollment reminders cadence, participation tends to cluster in the final 48 hours, which increases the support burden right when HR has the least bandwidth to handle it.

No measurement

Many organizations send their communication plan and never look back at whether it worked. Without tracking engagement, response activity, and campaign performance, HR has no way to demonstrate the value of the communication effort or improve it the following year.

How to measure open enrollment communication success

Measurement turns open enrollment communication from a one-time push into a strategy that improves every year. The following metrics give HR a clear view of what's working and what needs adjustment.

• Email open rates show whether subject lines and timing are getting employees to even look at the message. Low open rates often point to subject line fatigue or poor timing relative to employees' workdays.
• Click-through rates indicate whether the content inside the email is compelling enough to drive employees toward the next step, whether that's a portal link, a webinar registration, or an FAQ page.
• Enrollment completion rate signals that employees understood what was being asked of them and acted on it.
• HR help desk volume shows whether your educational content is addressing what employees need to know. A drop in repetitive questions year over year is a strong sign that communication is improving.
• Benefits utilization after enrollment closes shows whether employees made informed choices. Underutilized benefits, like an HSA that goes unused or a wellness program nobody signs up for, often point back to a communication gap earlier in the process.
• Employee satisfaction from post-enrollment surveys captures how employees felt about the process: whether they understood their options, felt supported, and found the communication helpful rather than overwhelming.
• FAQ engagement helps HR understand where confusion is concentrated, which can directly inform next year's educational content.

Pulling all of these metrics into a single dashboard gives HR a clear, ongoing view of communication performance. This is the kind of consolidated reporting that platforms like OneBenefits are built to provide, giving HR teams visibility into what's working instead of leaving them to operate on assumptions.

Measuring communication isn't just about proving effort. It's about justifying the investment companies make in benefits and giving HR the data to make next year's campaign stronger than the last.

How AI is changing open enrollment communication

Artificial intelligence is reshaping how HR teams approach open enrollment, moving communication from a manual, once-a-year scramble to an ongoing, largely automated process.

AI can be used to:

• Generate emails quickly, drawing on plan details and employee segments to produce drafts that HR can review and send rather than write from scratch.
• Personalize messaging at scale, tailoring content to different employee groups without requiring a separate manual campaign for each one.
• Automate reminders across email and SMS, ensuring no employee falls through the cracks as deadlines approach.
• Answer employee questions instantly, removing the bottleneck of waiting for an HR response.
• Power knowledge-based chatbots that draw on a company's benefits documentation to give accurate, specific answers around the clock.
• Support year-round engagement, keeping benefits top of mind outside of the enrollment window rather than letting them disappear from view until next fall.
• Surface analytics automatically, so HR doesn't have to manually compile open rates, click-through data, and completion metrics from multiple systems.

This is where OneBenefits fits into the picture. In place of a patchwork of disconnected tools, OneBenefits acts as an AI-powered communication platform purpose-built for benefits. It helps HR automate the creation of personalized communications, manage reminders across channels, power a chatbot that understands your specific benefits structure, and track performance in one place, reducing manual work during the busiest stretch of the HR calendar.

Frequently asked questions about open enrollment communication

What is open enrollment communication?

Open enrollment communication is the set of messages and channels HR uses to inform employees about their benefits options, guide them through decisions, and confirm their elections during the enrollment period.

When should open enrollment communication start?

Most effective strategies begin 8 to 10 weeks before the enrollment window opens, with formal announcements going out around 6 weeks ahead and education content following shortly after.

How often should HR send open enrollment reminders?

Reminders typically begin about two weeks before the deadline and increase in frequency as the deadline approaches, often moving to a daily cadence during the final enrollment week.

What should an open enrollment announcement include?

A strong announcement includes the enrollment window dates, a summary of what's changing, and clear direction on where employees can go for more information or support.

How do you measure communication success?

Key metrics include email open rates, click-through rates, enrollment completion rates, HR help desk volume, benefits utilization, and employee satisfaction, ideally tracked together through a single analytics dashboard.

How can AI improve open enrollment communication?

AI can generate personalized messaging at scale, automate reminders across channels, power chatbots for instant employee support, and consolidate performance analytics, reducing manual work while improving the employee experience.

How can you reduce HR workload during open enrollment?

Leveraging strong upfront education, self-service resources like FAQs and chatbots, and automated reminder campaigns frees HR from answering the same questions individually, often dozens or hundreds of times each cycle.

Final thoughts

Great communication improves open enrollment participation. It helps employees move from passive re-enrollment to active, informed decisions that fit their lives. Better communication also improves benefits utilization, since employees who feel informed about their benefits are significantly more likely to participate in them.

Just as importantly, better communication reduces the burden on HR. It leads to fewer repetitive questions, fewer last-minute scrambles, and a clearer process for everyone involved.

Open enrollment shouldn't be treated as a once-a-year scramble. It should be part of a year-round engagement strategy, one that builds on itself every cycle rather than starting from scratch each fall.