The high performer behaving badly: a step-by-step HR playbook

60-Second Summary

The cost of tolerating a brilliant jerk is rarely visible on their scorecard — it shows up in attrition of the people around them, suppressed dissent, and slow exits of A-players you wanted to keep.
Run the math: replacement cost of the high performer vs. attrition cost of the 3–5 people quietly leaving because of them. The second is almost always bigger.
Standards-first conversation, not values-first. Describe specific behavior, specific impact, specific change. Six-week timeline. Documented.
If the team has been watching for a year and nothing happens, your culture problem is no longer the jerk — it’s leadership’s tolerance of them.

Every HR leader will face this. A top performer is also the team’s biggest problem. The temptation to look away is enormous and rationalized in business terms. The cost of looking away is almost always higher than it appears.

Step 1 — Run the math honestly

List the 3–5 people most affected by the behavior. Estimate the probability each leaves in the next 6 months if nothing changes. Multiply by their fully loaded replacement cost (typically 1.5–2x salary).
Estimate the replacement cost of the high performer at the same multiplier, weighted by the probability you actually have to replace them (not 100%; many ‘irreplaceables’ stay through hard conversations).
Add the invisible cost: suppressed dissent, slower decisions, lost candidates who heard the rumor.

Step 2 — Prep the manager

Script — HR to manager

‘Before we do this conversation, I need three things from you. (1) Three specific behavioral examples with dates and witnesses — not adjectives. (2) Your honest answer: if they don’t change, are you prepared to exit them in 90 days, even if revenue takes a hit? If your answer is no, this conversation is theater and I won’t run it. (3) Your commitment to give them the next six weeks of your attention — weekly 30-min check-ins, written feedback, no avoiding.’

Step 3 — The standards conversation (script)

Script — manager + HR to high performer (60 min, documented)

‘[Name], your results are real and we want to keep you. I’m going to talk about how you’re getting them, because that part isn’t working. Three specific behaviors. (1) [DATE]: in the [meeting], you said [exact words] to [person]. Two people told me independently it changed how they show up in that room. (2) [DATE]: you reversed [decision] in Slack at 11pm without looping in [owner]. They learned about it from their team. (3) [DATE]: in the [review], you dismissed [colleague]’s proposal with [behavior]. This is the standard. (1) Critique ideas, never people. (2) Decisions that touch another owner’s scope are discussed with them first. (3) Disagreement is welcomed, dismissal is not. What changes. We’ll meet weekly for six weeks. After each week I’ll send you written notes on what I saw. At week six we decide together whether the pattern has changed. If it has, we move on. If it hasn’t, we’re in a different conversation about whether this is the right place for you. Now — what am I getting wrong, and what do you want to push back on?’

Step 4 — Six weeks of evidence

Weekly 30-min check-in, same day/time. Manager runs it, HR observes first two then steps back.
Written notes after each — three positive observations, three concerns, one ask for the next week. Shared in writing.
Two skip-level conversations by HR with people on the team to triangulate. Don’t rely on the offender’s self-report.
At week 3, midpoint decision: meaningfully better, marginally better, unchanged. If unchanged, accelerate the timeline — don’t extend it.

Step 5 — Signal to the team

Without revealing details, the manager owes the team a standards statement. Otherwise, the team concludes the company tolerates the behavior — and your A-players start interviewing.

Script — manager to team

‘Quick standard-setting. Some of you have raised — to me or to HR — concerns about how people treat each other on this team. I’ve heard it. The standard is: critique ideas, not people; disagreement is welcomed, dismissal is not; decisions that touch your scope come to you first. I’m holding everyone, including our top performers, to it. If you see it violated, bring it to me or to [HRBP]. End of standard-setting.’

Written by Pawan Joshi.Sources cited inline.

First published 15 Jun 2026See site changelog →