The Invisible Work Draining Your Best Employees

Most leaders assume they understand employee workload by tracking hours, deadlines, and performance metrics. But those measures overlook a powerful driver of burnout, disengagement, and turnover at work: the mental load.

The mental load is the continuous cognitive and emotional work of planning, organizing, and managing the details that keep work and life running. In the workplace, the thinking required for work is not just the cognitive labor of ensuring that tasks meet deadlines. It is also the emotional aspect of collaboratively brainstorming solutions, managing office relationships, handling employee interpersonal conflicts, and ensuring that output meets standards. At home, such mental load means coordinating care for kids, parents, or loved ones; managing household logistics; providing emotional support; and planning for the future. Most employees carry both loads at once, and the overload is crushing them.

This isn’t just a work problem or a life problem. It’s a collision problem. And while leaders can’t eliminate either load entirely, understanding how they interact and where to intervene makes the difference between retaining top talent and losing them to burnout and attrition. It also shapes day-to-day business performance by reducing focus time, slowing decision cycles, increasing error rates, and dampening creativity, which can affect revenue growth, client satisfaction, and innovation velocity.

Drawing on research from Leah Ruppanner’s recent book, Drained: Reduce Your Mental Load to Do Less and Be More, and insights from the recent Mental Load Collaborative workshop in Washington, DC—convened by the Gender & Work Initiative at Johns Hopkins Carey Business School—we map out the challenges and a research-backed way forward.

The Collision Effect: When Work and Life Mental Loads Meet

Consider Maria, a marketing director managing a product launch and raising a family while her father undergoes cancer treatment three states away. She’s leading cross-functional teams, managing vendor relationships, and ensuring launch deliverables hit their marks while simultaneously coordinating with oncologists, scheduling treatments, and researching care facilities.

The collision creates three compounding effects that go far beyond simple “busyness.”

Cognitive fragmentation. This is what Maria experiences as she toggles between Slack and hospital portals, between investor decks and insurance claims, occasionally thinking about upcoming family plans or the need to schedule a dental cleaning. She rarely has the time to think one thought through to completion. Each task requires its own decision-making frameworks, emotional registers, and information streams. Sometimes they overlap, but more often they compete—and constantly switching between them doesn’t just take time, it depletes the cognitive resources needed for both.

Impossible prioritization. When the home health nurse calls during Maria’s investor presentation or her boss needs an urgent deliverable while she’s on her way to pick up her kids from school, there’s no “right” choice of how to respond, which intensifies the emotionality of the thinking work. The mental energy spent on these trade-offs drains capacity for actual execution at home and at work.

Spillover exhaustion. Stress from one task bleeds into the others and makes the mental load feel never-ending. The cognitive drain comes not from any single task, but from carrying all of them simultaneously across home and work and making countless micro-decisions about priorities, trade-offs, and timing. Everything on Maria’s plate requires mental energy. And unlike physical exhaustion, mental load depletion is invisible, which makes it easy to dismiss as poor time management rather than recognizing it as work-family spillover.

It is also relentless; remote and hybrid work have eroded the psychological barrier between roles. Maria checks Slack at dinner, pays a few bills, answers emails before bed, and has lost the commute that once helped her decompress. Her current reality is an “always on” state that occupies all her waking hours.

A Roadmap for Leaders to Support the Mental Load

Leaders cannot account for people’s personal lives. But they can understand that employees are constantly toggling in ways that swell workloads and splinter focus, making deep concentration and true recovery rare. And they can help to mitigate the burden. Here’s how.

Make the invisible visible. Most employees can’t articulate their mental load. Leaders can integrate mental load assessments to better understand the load at work into performance check-ins, team retrospectives, and annual engagement surveys. These can help employees develop the language to surface concerns and process improvements. For example, LightenLab, an academic lab run by one of us (Leah), offers a free assessment, but there are many others to choose from. You can also work with your company’s HR or people department to create your own. Once your employees have their results, you can facilitate conversations around key questions:

• Where is mental load concentrated on our team?

• What patterns emerge across roles?

• Which types of mental load are consuming the most energy?

These discussions make invisible work visible, create a shared vocabulary for addressing it strategically, and are the foundation for programmatically addressing employees’ mental loads.

Once employees identify what is contributing to their mental load, they can consider what deserves so much of their mental space, and what can be eliminated, delegated, or automated. When items cannot be eliminated, managers can help employees prioritize and ensure that heavily taxed employees make time each week for true rest and recovery.

Make flexibility genuinely flexible, not performative. Most companies offer “flexible work” but still expect real-time responsiveness across all working hours. This creates a false sense of flexibility, as employees feel guilty about taking it or are burned out from constant availability. Maria might be in the middle of a doctor’s appointment with her sick child when she sees a new email from a client. The schedule may be flexible, but the mental load of being “always on” and a good contributor for her client remains constant.

Instead, define core collaboration hours (e.g., 10 AM–3 PM) and true offline periods. If employees have emergencies that require them to be fully offline, establish protocols and processes to ensure contact is limited—or even restricted—during these periods. This includes encouraging employees to mute all workplace correspondence at these times.

Further, when a team member faces an emergency, leaders should clearly assign specific coverage tasks based on each person’s capacity while explicitly acknowledging the extra burden this creates. Don’t leave it to volunteers. Frame the situation as collective resilience, such as “We protect each other because life happens to all of us,” and make the reciprocity real: when those who covered need flexibility later, they receive it without question. Leaders must visibly take on substantial coverage work themselves to normalize the practice and demonstrate it’s not just a policy, but a lived cultural value.

Create mental load buffers during high-volume periods. When work volume spikes, you may not be able to reduce the core work required. But you can reduce the mental load around the work by limiting non-essential contact during intense time periods. This effort could include allowing affected employees to enable automated email replies or Slack and Teams statuses, signaling their priorities and “do not disturb” mode. Leaders and managers can also identify non-essential decisions, simplify reporting requirements, and batch meetings to ensure contact and correspondence is tied only to the core work. At the organizational level, this would include limiting cross-team contact for non-essential work, such as delaying company-wide emails or limiting HR training to slower periods.

Model recovery and boundaries at the leadership level. Employees won’t believe they have permission to set boundaries if leaders don’t model them. If your C-suite team members respond to emails at midnight and work through vacation, that’s your actual organizational culture, regardless of what your written policies say.

Leaders must visibly take disconnected time off, set and communicate boundaries on communication hours, and celebrate employees who use leave fully. Leaders should openly discuss the ebbs and flows of work life and its mental load to help employees articulate its toll, and open conversations for solutions and resources to support mental loads specifically. For example, setting scheduled and transparent offline hours that people can see via shared calendars, communications platforms or physical office signs demonstrates that it’s appropriate and expected to set boundaries. Another effective approach for leaders who have formal deputies is to assign them as the primary point of contact for urgent situations during scheduled offline time. Raising awareness of this expectation and integrating it into daily actions and discussions is key to making the invisible visible.

. . .

Mental load may not top leadership agendas amid AI disruption, geopolitical volatility, and economic uncertainty. But as research and emerging practice suggest, it is not a peripheral concern—it is a fundamental organizational constraint on focus, decision-making, and innovation.

Leaders now have a clearer playbook: make invisible work visible, audit where mental load is draining capacity, and redesign work and policies to better distribute it. Organizations that do this well will unlock sharper thinking, stronger talent pipelines, and more resilient performance. Those who don’t will continue to pay the hidden tax of fragmented attention, preventable burnout, and attrition. The question is no longer whether mental load matters—it’s whether your organization is willing to manage it as deliberately as any other driver of performance.

Copyright 2026 Harvard Business School Publishing Corporation. Distributed by The New York Times Syndicate.

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