The High Cost of Underperformers at Work

The High Cost of Underperformers: Why “Being Nice” Undermines Team Performance
When assessing organizational culture, one pattern shows up with uncomfortable consistency — leaders underestimate the true cost of underperformance. Especially among first-time managers, there is a persistent belief that likability drives results. The thinking goes: if the team sees me as approachable and agreeable, they will be more engaged and productive.

That assumption does not hold up under scrutiny. Building a high-performing team requires far more than being liked. It demands:

• Clarity.
• Accountability.
• The willingness to address gaps in both performance and behavior.

Why “Nice” Is Not a Leadership Strategy
Treating people with dignity and respect is foundational — it is the baseline, not the differentiator. Where many inexperienced leaders go wrong is conflating “nice” with avoiding discomfort. People manager assessment center data finds that they:

• Hesitate to challenge poor performance.
• Delay difficult conversations.
• Sidestep consequences in an effort to preserve harmony.

This tendency becomes even more pronounced when dealing with well-liked or tenured employees. Familiarity breeds tolerance, and tolerance erodes cultural standards.  The result is predictable.

• Standards blur.
• Accountability weakens.
• Kindness becomes a liability.

The Organizational Drag of Underperformance
Underperformers do not operate in isolation. Their impact ripples across teams, often in ways leaders fail to fully appreciate.

Research from Harvard Business School highlights the magnitude of the issue — toxic or disengaged employees can significantly reduce both commitment and performance among their peers. The damage is not contained; it spreads.  There are two primary dimensions of this high cost of underperformers:

• Internal Consequences
  Inside the organization, underperformance sends a powerful signal — and not the one leaders intend. When poor performance goes unaddressed, high performers recalibrate their expectations.

  Effort declines. Discretionary energy disappears. The unwritten question becomes: Why should I push harder if others are not held to the same standard?

  Over time, this dynamic creates a slow but steady erosion of performance culture. High performers either disengage or leave altogether, taking institutional knowledge and momentum with them. What remains is a diluted standard of excellence that becomes increasingly difficult to reverse.

• External Consequences
  The impact does not stop at internal culture. Customers, partners, and stakeholders experience the downstream effects of underperformance firsthand.

  Inconsistent strategy execution, missed commitments, and subpar interactions chip away at trust. Brand reputation — often built over years — can deteriorate quickly when frontline experiences fail to meet expectations.

  Organizations do not lose credibility in dramatic moments; they lose it through repeated exposure to mediocrity.

New Leaders: Go Slow to Go Fast — Avoid The High Cost of Underperformers

Stepping into a leadership role triggers a natural urge to act quickly — to prove value, fix problems, and make visible improvements. But the most effective new leaders resist that impulse. They go slow first, so they can go fast later — especially when it comes to managing performance and avoiding the costly drag of underperformers.

Early missteps in assessing people and performance can lock in poor decisions that are difficult to unwind. Taking time to understand the landscape is not hesitation; it is disciplined leadership.  Before making structural changes or redefining roles, new leaders should invest time in observation and diagnosis. That means taking these research-backed steps:

1. Get to Know Your Team
   Every team is a mix of motivations, strengths, and blind spots. Effective leaders take the time to understand what energizes each person, what they do exceptionally well, and where they consistently struggle.

   When people are aligned with roles that leverage their strengths, engagement rises. And engagement is not a soft metric — it is strongly linked to discretionary effort, advocacy, and retention. Research from Gallup consistently shows that highly engaged teams outperform their peers across productivity, profitability, and customer outcomes.

   This is where “going slow” pays off. Without this insight, leaders risk making premature judgments that misdiagnose performance issues or overlook untapped potential.

2. Assess Individual Performance with Clarity
   Once you understand the team dynamics, it becomes easier to separate perception from reality. Every team has a performance distribution — top performers, steady contributors, and those who fall short.

   Even underperformers often bring strengths to the table. The leadership challenge is to create the conditions where those strengths can translate into results.

   Given the well-documented cultural and financial cost of underperformance, leaders must act with clarity and consistency:

   — Define explicit performance expectations.
   — Establish meaningful rewards and consequences.
   — Diagnose root causes of underperformance.
   — Intervene quickly with targeted support — coaching, customized training, or role adjustments.

   Avoiding these steps in the name of being “fair” or “supportive” only prolongs the issue and amplifies its impact.

3. Address the Reality of Underperformance
   Underperformance is rarely neutral. Left unaddressed, it erodes team standards and signals that accountability is optional. Research from Harvard Business School underscores how even a small number of low performers can significantly reduce team output and morale.

   That is why early, thoughtful intervention matters. The goal is not punishment — it is performance improvement. But improvement requires both support and accountability.

4. Reassess and Act Decisively
   After a defined period — often around 90 days — leaders must evaluate progress with clear eyes. If there is genuine effort and measurable improvement, continue to invest.

   If there is little progress, minimal effort, or no real commitment to change, the decision becomes more straightforward.

   At that point, the most responsible course of action is to transition the individual — ideally into a role better suited to their strengths, or, when necessary, out of the organization. Done well, this is not punitive; it is respectful to both the individual and the team.

   Holding on too long sends the wrong message to everyone else.

The Leadership Discipline That Pays Off
Going slow at the start is not about delaying action — it is about ensuring that action is:

• Informed.
• Targeted.
• Effective.

Leaders who take the time to understand their people make better decisions, move faster with confidence, and avoid the hidden costs that come from mismanaging performance.

The Bottom Line
New leaders who rush to act often create more problems than they solve. By taking the time to understand their team, set clear expectations, and address underperformance with discipline, they position themselves to move faster and more effectively over time. The real risk is not moving too slowly — it is moving too quickly without clarity.

To learn more about being a high performance manager and the high cost of underperformers, download 3 Must Have Ingredients for High Performing Teams

by Tristam Brown: CEO

Tristam Brown is an executive business consultant and organizational development expert with more than three decades of experience helping organizations accelerate performance, build high-impact teams, and turn strategy into execution. As CEO of LSA Global, he works with leaders to get and stay aligned™ through research-backed strategy, culture, and talent solutions that produce measurable, business-critical results. See full bio.