How to Remove Toxic Employees Without Destroying Performance
I was coaching a business owner recently who was dealing with a dilemma that keeps most leaders awake at night.
“I have this employee who’s been with me for years. She gets everything done. Never misses deadlines. But she’s got this attitude with clients and talks down to newer employees. I keep getting complaints, but I’m terrified to let her go because she handles so much.”
This is the performance paradox that destroys more teams than most leaders realize: keeping one “productive” toxic employee can tank the performance of everyone around them.
The Hidden Performance Cost
Too often, leaders zero in on the visible results of a toxic employee and overlook the hidden performance drain they create for everyone else.
That “high-performing” toxic employee might be:
- Causing your best people to underperform because they’re frustrated or distracted
- Creating customer issues that quietly erode your reputation and retention
- Soaking up management time and energy that could be spent developing top talent
- Undermining collaboration, trust, and innovation across the team
The real cost shows up in what your team stops doing.
One person’s negative behavior can ripple out and lower the performance of five, ten, or even more people around them.
If you’re only measuring individual output, you’re missing the bigger picture: team performance, customer experience, and your own leadership bandwidth all take a hit.
The Multiplication Effect
Elite performers understand something that average leaders miss: performance is contagious, both positive and negative.
One toxic employee doesn’t just hurt their own results. They create a performance drain that spreads across the entire team.
Studies show that a single toxic employee can reduce the performance of 5-10 colleagues.
Meanwhile, that same toxic employee is often consuming 20-30% of a manager’s time dealing with the problems they create – time that could be spent developing high performing team members or growing the business.
The “Irreplaceable” Illusion
Most leaders get caught in what I call the “irreplaceable employee” trap. They convince themselves that removing the toxic person will hurt performance, when the opposite is usually true.
Here’s how the illusion works:
You see the toxic employee’s output – the projects they finish, the deadlines they hit, the fires they put out. On paper, they look busy and productive.
But what you don’t see is the silent cost: the other high-performing team members who are frustrated, the clients who quietly leave, the managers who spend hours cleaning up messes or mediating drama.
You start to believe that this person is holding the team together, when in reality, they’re holding the team back.
The fear is understandable. You worry about the short-term disruption: Who will pick up the slack? What if things fall through the cracks? But what you’re really trading is long-term team performance for short-term comfort.
The truth is, no one is irreplaceable – especially not someone who’s eroding the performance of everyone around them. The longer you wait, the more damage gets done.
The Playbook for Performance-Driven Leaders
When you realize a toxic employee is holding your team back, you need a systematic approach that protects performance at every step.
Here’s the playbook I use with leaders who want to make the right call, without sacrificing results or morale:
Step 1: Measure the Real Performance Impact
Before you make any moves, get clear on the numbers.
Track client complaints, team productivity, and how much management time is spent dealing with this person’s issues. Look for patterns – are projects stalling, or are good people leaving, whenever this employee is involved?
The data will almost always show the true cost is higher than you think.
Step 2: Document Performance-Based Behaviors
Don’t make it about personality.
Focus on specific, measurable behaviors that hurt team or client performance. Log missed deadlines, negative feedback, and disruptions to workflow.
This shifts the conversation from “they’re difficult” to “their actions are hurting our standards.”
Step 3: Empower the Right Manager
The direct supervisor – not the CEO – should handle the conversation. Equip them with a clear framework and support.
This builds leadership capacity and ensures the message is about performance, not personal conflict.
Step 4: Prepare for All Outcomes
Before the conversation, document the employee’s responsibilities and identify what’s truly critical. Cross-train team members and have a transition plan ready.
This way, you protect performance even if the employee leaves immediately.
Step 5: Communicate Performance Standards
Frame the conversation around what the team needs to perform at its best.
“Our standards require everyone to contribute to a collaborative, high-performing environment. Here’s where your actions have fallen short, and here’s what needs to change.”
Step 6: Follow Through and Support the Team
If the employee leaves, communicate clearly with the team. Reinforce your commitment to a high-performance culture and support those picking up new responsibilities.
Most teams feel relief and renewed energy when a toxic barrier is removed.
This playbook isn’t about being ruthless – it’s about protecting the performance of your entire team.
When you lead with data, clarity, and a focus on standards, you make it possible for everyone else to do their best work.
How to Build a High-Performance Bench
One of the biggest insights from working with leaders on tough personnel decisions is this: you can’t raise performance standards – or remove toxic barriers – if you don’t have depth on your team.
A high-performance bench isn’t just about having backups. It’s about creating a culture where no single person holds the keys to your results.
Here’s how performance-driven leaders build real depth:
Always be recruiting. Even when you’re fully staffed, keep your eyes open for talent. The best teams are always looking for their next high performer.
- Cross-train your team. Don’t let critical knowledge or processes live with just one person. Make sure others can step in without missing a beat.
- Document everything. High performers don’t hoard information, they share it. Clear role descriptions and process docs make transitions seamless.
- Develop your rising stars. Invest in training and mentorship so your next leaders are ready before you need them.
- Reward team players, not just individual stars. Make it clear that helping others perform is just as valuable as personal output.
When you have a strong bench, you’re never held hostage by one person’s performance, or their attitude. You can make the right call for the team, knowing you have the depth to keep performance high.
Teams Step Up When Toxicity Steps Out
When the decision is finally made to address a toxic employee, most leaders brace for chaos. But what actually happens is almost always the opposite.
Yes, there may be a short-term dip as responsibilities are redistributed and the team adjusts. But in every case I’ve seen, the long-term gains far outweigh the temporary disruption.
Team performance improves. Customer complaints drop. Managers can finally focus on developing people instead of managing drama. New hires stay longer because the culture supports high performance.
And, most importantly, you start attracting and retaining the kind of talent that wants to work in a healthy, high-performing environment.
When the barrier is gone, you see what your team is truly capable of.
Find the Hidden Drains on Team Performance
Take a hard look at your team right now. Is there someone who looks productive on paper, but might be holding everyone else back?
Ask yourself:
- How much management time does this person consume?
- Do client complaints cluster around their interactions?
- Are your best people frustrated or disengaged when working with them?
- Are you hesitating to hire strong talent because you’re worried about personality conflicts?
- How much of your own mental energy is spent managing their impact?
If you’re nodding along to more than one of these, you may have a toxic barrier holding your team back.
Your Next Move
Making tough calls is part of leadership, but the real goal is to protect your team’s ability to perform at their best – by planning and acting with intention.
Start by measuring the real performance cost of keeping toxic employees. Document the impact on productivity, client satisfaction, and management effectiveness.
Prepare for transition: document responsibilities, cross-train your team, and build your bench strength.
Empower your managers to have performance-focused conversations and set clear standards for everyone.
Your job as a leader isn’t to manage toxic behavior. It’s to create an environment where high performers can do their best work.
Every time I’ve seen a leader make this move, the team finds a new gear. That’s the real payoff.
Be Bold. Take Action. Leave a Mark.
Todd Herman
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