Career

Why Your Best Employees Are Burning Out — And 3 Research-Backed Ways to Fix It

Think about the person on your team who always delivers. The one who stays late when a deadline looms, who raises their hand when a critical project needs an owner, who colleagues come to when they're stuck. Now think about where they are today. If they're still on your team, are they thriving — or are they quietly running on empty, one bad week away from handing in their notice?

This is one of the most widespread and costly blind spots in management today: the employees we rely on most are often the ones burning out the fastest. And the troubling part is that it usually isn't malicious, or even intentional. It's the result of a predictable, research-documented pattern in how managers distribute work — and it has real consequences for the people and organizations it affects.

The Employee Everyone Relies On — And Why That's a Problem

Every team has someone like this. They're motivated, reliable, and passionate about their work. They don't need to be asked twice. When a new initiative launches, they volunteer. When something unexpected lands on the team's plate, their name is the first that comes to mind. Their manager trusts them, their colleagues respect them, and their performance reviews are consistently excellent.

This person is invaluable. And they are also, statistically, the most likely person on your team to burn out.

Engagement — the deep psychological investment an employee has in their work — is widely celebrated in organizations, and for good reason. Engaged employees are more productive, more creative, and far less likely to leave. But engagement comes with a shadow side that most organizations fail to address: it makes employees a target for disproportionate workloads.

What Research Says About Engaged Employees and Extra Work

In a landmark study published in Harvard Business Review in 2026, researchers Sangah Bae of Northeastern University and Kaitlin Woolley of Cornell University analyzed data from more than 4,300 managers and employees. Their finding was striking: when unexpected work arises, managers systematically assign nearly 70% of additional tasks to their most intrinsically motivated employees.

Intrinsic motivation — the internal drive to do something because it is inherently rewarding, not because of an external reward or fear of punishment — is the hallmark of the engaged employee. And it is precisely this quality that makes them a magnet for extra work. Managers perceive intrinsically motivated employees as both capable and willing, which makes them the path of least resistance when something needs to get done quickly.

The False Assumptions Managers Make

The problem deepens because of two false beliefs that most managers hold about their high-performing, highly engaged employees.

The first assumption is that these employees enjoy extra work. Because they seem enthusiastic and invested, managers assume that assigning them more is doing them a favor — giving them stimulating challenges and opportunities to shine. But research consistently shows that this is not the case. Even intrinsically motivated employees have finite energy. When they are given more work than they can sustainably handle, the experience shifts from energizing to draining, regardless of how much they love their job.

The second assumption is that engaged employees are immune to burnout. They seem resilient, capable, and positive — so managers conclude that they can handle more than others. But a study of more than 1,000 US workers conducted by researchers at the University of Cambridge found the opposite: many of the most highly engaged employees are simultaneously experiencing significant burnout. Engagement does not protect against burnout; in fact, when engagement is combined with excessive demands, it can accelerate it.

The Hidden Cost of Getting It Wrong

The consequences of overburdening engaged employees extend far beyond individual wellbeing. They ripple through teams, budgets, and organizations at scale.

What Burnout Really Costs a Company

The numbers are sobering. According to 2026 data, 83% of workers report experiencing at least some degree of burnout — a figure consistent with recent years and showing no sign of decline. But the financial toll is what truly makes this a business imperative, not just a human resources concern.

Burnout costs an estimated $3,999 per year for each non-managerial hourly employee and up to $20,683 per year for executives, according to research published in the American Journal of Preventive Medicine. For a 1,000-person company, burnout-related disengagement can drain up to $5 million annually from the bottom line through reduced productivity, absenteeism, and turnover.

Teams with low engagement see turnover rates that are 18% to 43% higher than their more engaged counterparts. And replacing a knowledge worker typically costs 50% to 200% of their annual salary once you account for recruiting, onboarding, and the time it takes a new hire to reach full productivity.

The Paradox: Losing the Employees You Can Least Afford to Lose

Here is the painful irony at the heart of this problem. Engaged employees are 87% less likely to voluntarily leave their employer than disengaged colleagues. They are precisely the people organizations invest most heavily in retaining. But when burnout takes hold, that protective effect disappears.

Research from Keystone Partners found that high performers with low resilience — people who are brilliant at their jobs but depleted by chronic overload — are five times more likely to be actively searching for a new job compared to their resilient counterparts. The employees you count on most become the ones walking out the door. And because high performers tend to have strong market value, they rarely struggle to find something better.

The systemic overloading of engaged employees is therefore not just an ethical problem. It is a strategic one. Organizations are inadvertently training their most valuable people to leave.

3 Research-Backed Ways to Distribute Work More Fairly

The good news is that this pattern can be interrupted — and the interventions required are neither expensive nor complicated. They require a shift in awareness and intentional practice, but they are accessible to any manager willing to take them seriously.

Intervention 1 — Make Task Allocation Visible

The first and most foundational intervention is to make the distribution of work visible. In most teams, task allocation happens informally and in real time: a project comes in, the manager thinks of the first capable person who comes to mind, and the work gets assigned. There is no aggregate view of who has been given how much, or how often the same names appear.

Creating that visibility changes everything. When managers can see — in a dashboard, a shared spreadsheet, or a project management tool — the cumulative load each team member is carrying, they are far less likely to default to the same people out of habit. Practical steps to implement this:

Introduce a simple workload tracking system where each team member's current tasks and estimated hours are visible to the manager at all times.
Set a regular cadence — weekly or biweekly — for reviewing capacity across the whole team, not just checking in with the loudest or most visible employees.
Before assigning any new unexpected task, explicitly check who has available capacity rather than who first comes to mind.
Track how often each team member receives extra work over a rolling 30- or 60-day period and use that data to inform future decisions.

Intervention 2 — Reframe What “Enjoyment” Means

The second intervention targets the false assumption that engaged employees enjoy all extra work equally. Managers need to stop guessing at what their high performers find fulfilling and start asking directly. Questions every manager should regularly ask their engaged employees:

What kinds of work do you find most energizing, and what feels most draining?
Are there types of tasks you'd like to do more of? Less of?
How is your current workload feeling — sustainable, stretched, or overwhelming?
Are there projects you'd like to step back from to make room for something new?
What does a good week look like for you right now?

These conversations do two things simultaneously. They give managers accurate information to make better allocation decisions, and they signal to the employee that their experience matters — which is itself a powerful retention tool.

Intervention 3 — Deliberately Develop Other Team Members

The third intervention addresses the structural root of the problem: the over-reliance on a small group of high performers while other team members remain underutilized and underdeveloped. When every difficult project goes to the same three people, two things happen. Those three people burn out. And everyone else fails to grow. The long-term result is a team with a fragile concentration of capability and no bench strength.

The antidote is deliberate, skill-based task assignment — matching tasks not to whoever can do them most easily, but to whoever will grow the most from doing them, with appropriate support. How to start developing other team members through task assignment:

Map your team's current skills and identify where each person has untapped potential or expressed interest in growth.
When a new project or task arrives, ask: who could stretch into this, with some guidance? Rather than defaulting to who could handle it with the least friction.
Implement task rotation on recurring responsibilities so that knowledge, visibility, and workload are shared more broadly.
Provide scaffolding for developing employees: pair them with a more experienced colleague, schedule a debrief after the project, or check in at key milestones.
Celebrate growth and progress publicly, not just flawless delivery — this reinforces a culture where learning and development are valued for everyone.

How to Build a Team That Thrives — Without Burning Anyone Out

Individual interventions are more powerful when they sit within a broader culture of equitable, sustainable team management. High-performing teams that avoid the burnout trap tend to share several key principles:

Work is distributed based on capacity and growth potential, not just speed and reliability.
Managers check in on workload proactively, not just when someone reaches a breaking point.
All contributions are recognized, not just the visible heroics of the most engaged employees.
Employees at every level have a clear path for development, not just the top performers.
Team members feel safe raising concerns about workload without fear of being seen as uncommitted.

The Manager's Role in Protecting Engagement

Leadership behavior is the single most powerful variable in burnout prevention. Research on transformational leadership — a style characterized by inspiring and developing all team members rather than simply directing them — consistently shows that it reduces burnout and cuts active disengagement by up to half.

For most managers, this doesn't require a personality transplant. It requires specific habits: holding regular one-on-one meetings that go beyond project updates to include wellbeing and development conversations; conducting periodic workload audits; distributing recognition across the whole team rather than concentrating it on a few stars; and modeling the boundary-setting behavior you want to see in your team.

Building Psychological Safety Around Workload

One of the most underappreciated factors in burnout prevention is psychological safety — the shared belief that it is safe to speak up, make mistakes, and be honest without fear of punishment or embarrassment. In the context of workload, psychological safety means that employees feel comfortable saying “I'm at capacity” without worrying that it will be interpreted as laziness or disengagement.

When psychological safety is absent, overloaded employees stay silent. The burden accumulates invisibly until it reaches a tipping point — and then the manager is blindsided by a resignation from someone they thought was thriving. Building psychological safety around workload means explicitly inviting honest conversation, responding without defensiveness when employees raise concerns, and demonstrating through action that workload boundaries are respected, not penalized.

Conclusion

The engagement-burnout paradox is not a mystery. It is a predictable outcome of how most organizations and managers operate: reward the most motivated people with more work, assume they enjoy it and can handle it, and repeat until they leave.

But it doesn't have to be this way. The research is clear — and so are the solutions. Making task allocation visible, having honest conversations about what employees actually find fulfilling, and deliberately developing every team member are not radical interventions. They are practical habits that any manager can build.

Protecting your best employees from burnout is not just the compassionate thing to do. It is the smartest long-term investment a manager can make. The cost of losing a high performer to preventable burnout — in recruitment fees, institutional knowledge, team morale, and months of lost productivity — far outweighs the effort of distributing work more thoughtfully.

So the question to sit with is simple: on your team right now, who is getting too much? And who could be getting more?

Sources

Are You Overburdening Your Most Engaged Employees? — Harvard Business Review