A team member delivers genuinely exceptional individual results while behaving in ways that are genuinely toxic — belittling colleagues, undermining others, creating a climate of fear around them. Organisations often tolerate this pattern for far longer than they should, precisely because the strong results provide real, visible cover that makes the toxic behaviour easier to overlook or excuse.
Why Organisations Tolerate This Pattern Longer Than They Should
Strong, visible individual results create genuine pressure not to challenge someone delivering them, especially when leadership fears losing that specific output. This creates a real and understandable, if ultimately costly, incentive to look past behaviour that would otherwise be addressed directly and immediately in someone with weaker performance.
The Real, Often Hidden Costs of This Tolerance
Other talented people leave or disengage because of the toxic behaviour. Genuinely capable colleagues often leave, or quietly disengage, rather than continue working under someone whose toxic behaviour goes unaddressed, a real and significant cost that’s often harder to see directly than the toxic person’s visible output.
Trust in leadership’s fairness erodes across the organisation. Visible tolerance of toxic behaviour from a high performer signals clearly, if unintentionally, that results matter more than how people are actually treated, damaging trust in leadership’s stated values more broadly.
The toxic behaviour itself often gets worse over time without consequence. Behaviour that goes unaddressed and unchallenged tends to continue or escalate, since the person has no genuine incentive to change something that’s producing no real consequence for them.
Team-wide productivity suffers even as individual output looks strong. A toxic presence on a team can reduce collective productivity and psychological safety significantly, even while the toxic individual’s own metrics look genuinely impressive in isolation.
How to Address This Directly
Calculate honestly the full, actual cost, not just the visible individual output. An honest accounting of the real costs — turnover, disengagement, damaged trust — alongside the visible individual output provides a more accurate picture of whether the tolerance is genuinely worth it.
Set clear behavioural expectations with real consequences for violation. Direct, honest communication that behavioural expectations apply regardless of individual performance, backed by genuine and consistent consequences, signals that results don’t purchase exemption from basic standards.
Be willing to accept some individual output loss for genuine cultural health. Recognising honestly that addressing toxic behaviour firmly may mean losing some individual output, at least temporarily, and being willing to accept that trade-off protects the team’s broader and more important health.
Why Tolerance Signals More Than Just One Exception
It’s worth being direct that tolerating one toxic high performer sends a signal that extends well beyond that single relationship — it teaches the entire organisation something real about what actually gets rewarded, regardless of any stated commitment to respectful behaviour.
Distinguishing Genuinely Toxic Behaviour From Simply Demanding Standards
High standards and genuine respect for others aren’t in conflict. A high performer who holds rigorous standards while treating colleagues with genuine respect differs meaningfully from one whose behaviour is genuinely toxic, and honest distinction between the two matters before addressing either.
Look for a pattern of genuine harm, not simply directness or high expectations. Toxic behaviour involves real, repeated harm to others — belittling, undermining, creating fear — distinct from someone who is simply direct or holds genuinely high standards.
A Practical Scenario
A leadership team recognises, through honest reflection, that a high-performing team member’s genuinely toxic behaviour toward colleagues has been tolerated for far too long because of strong individual results. They calculate honestly the real costs — two talented colleagues who left partly because of this person, and a broader climate of quiet disengagement on the team.
They set clear behavioural expectations with genuine consequences, communicating directly that results don’t excuse how colleagues are treated. When the behaviour doesn’t change sufficiently, they follow through with real consequences, accepting some individual output loss for the sake of broader team health. Team morale and retention improve significantly over the following months — a direct result of addressing the true, full cost of tolerance rather than continuing to weigh only the visible individual output.
Common Mistakes
Weighing only visible individual output without accounting for hidden costs. This produces an inaccurate picture that overstates the actual value of tolerating toxic behaviour.
Assuming behaviour will improve on its own without real consequences. Unaddressed toxic behaviour tends to continue or worsen, since there’s no genuine incentive for the person to change.
Confusing genuinely toxic behaviour with simply high standards or directness. This can lead to either wrongly tolerating real harm or unfairly punishing someone who is simply demanding but genuinely respectful.
Action Steps
- Calculate honestly the full cost of tolerating toxic behaviour, including turnover, disengagement, and damaged trust, not just visible output.
- Set clear behavioural expectations that apply regardless of individual performance, backed by genuine consequences.
- Be willing to accept some individual output loss for the sake of broader team health if necessary.
- Distinguish honestly between genuinely toxic behaviour and simply high standards or directness.
- Follow through consistently with real consequences if toxic behaviour doesn’t genuinely improve.
Key Takeaways
- Organisations often tolerate toxic high performers longer than they should because strong visible results provide real cover for the underlying behaviour.
- Talented colleagues leaving, eroded trust in leadership fairness, worsening behaviour, and reduced team-wide productivity are all real, often hidden costs.
- Calculating the full cost honestly, setting clear consequences, and accepting some output loss for cultural health all help address this directly.
- Tolerating one toxic high performer signals something real to the whole organisation about what actually gets rewarded, regardless of stated values.
Conclusion
Strong individual results can make organisations tolerate genuinely toxic behaviour for far too long, but the real cost of that tolerance extends well beyond what’s immediately visible. Calculating the full cost honestly, setting clear consequences, and being willing to accept some output loss for broader team health all help address this pattern directly rather than letting it continue unchallenged.
Frequently Asked Questions
Why do organisations tolerate toxic behaviour from high performers?
Strong, visible individual results create real pressure not to challenge someone delivering them, especially when leadership fears losing that specific output.
What are the hidden costs of tolerating a toxic high performer?
Talented colleagues leaving or disengaging, eroded trust in leadership’s fairness, worsening behaviour over time, and reduced team-wide productivity despite strong individual metrics.
How should leaders address a toxic high performer?
Calculate the full cost honestly, set clear behavioural expectations with real consequences, and be willing to accept some individual output loss for broader cultural health.
How can I tell if behaviour is genuinely toxic versus just demanding?
Look for a pattern of genuine harm to others — belittling, undermining, creating fear — distinct from someone who is simply direct or holds high standards while treating colleagues with respect.
Does addressing toxic behaviour always mean losing the person’s output?
Not necessarily, but leaders should be willing to accept that possibility if behaviour doesn’t genuinely improve, prioritising broader team health.
What message does tolerating toxic behaviour send to the rest of the organisation?
It signals clearly that results matter more than how people are treated, regardless of any stated commitment to respectful behaviour.