The email arrives on a Tuesday.
Your best rep is leaving. Eight weeks’ notice, a competitor, nothing you can match without blowing up the whole pay structure. You read it twice. Then you do the sum every sales leader does in that moment, the one about how much of next year’s number just walked out of the door.
For most teams the sum is worse than it should be. Not because the rep was good. Because nobody ever worked out why they were good.
Do you understand your “Star” performers?
Every sales leader can name their top performer. They can tell you the deals, the wins, the quarter that made the rep’s reputation. Ask them to describe the rep’s strengths and the answer comes quickly. Brilliant in the room. Customers love them. Just gets it.
That is praise. It is not a description.
“Just gets it” is what we say when someone is good and we have never worked out what they are actually doing. Which discovery questions open the deal up. How they read the buying group. What they do at the moment of commercial tension that the rep two desks over does not. The behaviour is right there in front of you, quarter after quarter, and it has never been turned into anything you could write down.
So it lives in one head. And one head can resign.
It’s your best performers who go first, leaving your with bang average
Here is the part that makes this urgent rather than theoretical. The people you most depend on are the people most likely to leave.
Your strongest sellers have the most options. They get the calls from recruiters. They have the track record that travels. And they have the highest expectations of the job, so when the recognition thins out, or the progression stalls, or the culture stops feeling like it is going somewhere, they are the first to act on it. Gallup has written for years about the same pattern: your best people walk first, and they walk over things that look small from the top.
Your underperformers, by contrast, tend to stay. The job is comfortable, the alternatives are thinner, and a quiet seat suits them. So the natural drift of an under-managed sales team is that the talent leaves and the passengers remain. The exact opposite of what the plan assumes.
There is a knock-on effect too. When one top performer goes, others often follow, because strong sellers benchmark themselves against each other. One resignation can become three before the quarter is out.
The difficult maths
Now put the numbers together, because they are not kind.
Average sales rep tenure is now somewhere around eighteen months. In 2010 it was closer to three years. Over the same period sales turnover has settled near 35%, against roughly 13% across other industries, and almost half of B2B sales organisations run turnover above 30%.
Against that, a new senior seller takes time to become productive. Sales onboarding benchmarks put time to full effectiveness at around five to six months for a typical B2B role, and twelve to eighteen months for complex, long-cycle selling. A useful rule of thumb is the average sales cycle plus ninety days.
Read those two facts next to each other. You are keeping good sellers for about eighteen months, and it takes you five to eighteen of those months to get a replacement to full speed. The productive window is narrow even when everything goes right. When your best people are the ones leaving, and what made them effective left with them, it is narrower still.
What you lose the day they leave
When a top performer goes, you lose three things at once, and only one of them is the person.
You lose the revenue, obviously. The pipeline they were carrying, the relationships only they hold, the deals leaning on their personal credibility.
You lose the ability to replace them well. You will hire against a job spec built from outcomes, not capability. “Proven closer, strong in mid-market.” That describes the results you want, not the specific skills that produced them. So you screen for the wrong things and hope the new person turns out to have the same hidden wiring. Most of the time they do not.
And you lose the chance to have taught it. This is the quiet one. For every year that rep was your best, the thing that made them effective could have been observed, worked out, and built into the rest of the team. It was not, because nobody had a way to see it clearly. The capability leaves with the person, having improved exactly one seller in the time you had it.
If you can’t describe your “standard” you don’t have a standard
Step back and the leaving rep is only the sharp end of a wider problem.
A big part of a sales leader’s job is setting the standard. Not the target, the standard: what good actually looks like in a discovery call, in a competitive deal, in a room with a sceptical buyer. That is the thing you coach the rest of the team towards.
But you can only set a standard you can describe. If your best rep’s edge has never been worked out and written down, then your standard is a person, not a method. And a person can hand in their notice. The moment they do, the benchmark the whole team was measured against walks out with them, and you are left setting the bar from memory.
This is why so many sales teams feel fragile even when the headline number looks healthy. The number is being carried by a few individuals performing in ways nobody else can see, repeat, or learn. Take two of them out and the structure underneath turns out to be thinner than the plan assumed.
What you must know before that email arrives
To work out what makes a top performer good, and to protect against the day they go, there are four things worth being able to describe about them with real precision.
First, the specific skills. Not “great closer” but the actual capabilities, named: where they are genuinely exceptional, where they are ordinary, what the few things are that explain the gap between them and the rep on the next desk. Turned into behaviours you could teach.
Second, what drives them. The motivation underneath the performance, because it tells you both how to keep them and what a replacement would need to share. Reps who look identical on the leaderboard are often driven by completely different things, and that changes who you hire next, and what would have made them stay.
Third, how they operate under pressure. The personality style that shapes how they handle a competitive deal, a difficult stakeholder, a quarter that is slipping. This is usually the least documented part of a star performer and the hardest to spot in a new hire.
Fourth, how others actually experience them. What customers and colleagues consistently report, not the leader’s impression from a pipeline review. This is where the real, transferable pattern of a top performer usually hides.
With those four things written down, your best rep stops being a mystery. The capability becomes something you can hire against, coach towards, build into the rest of the team, and hold up as the standard. The dependency does not vanish, but it stops being a secret.
Where to start?
For most sales leaders, the honest answer to “what exactly makes your best rep your best rep?” is a confident sentence or two that would not survive a follow-up question.
That is not a failure of attention. It is a data problem. The information that would actually explain a top performer, a precise skills picture, a motivation profile, personality style under pressure, and external perception, is not collected in any usable form in most organisations. It sits in impressions and instinct, in exactly the place that walks out of the door on notice.
The Team Diagnostic exists to make that picture explicit. It gives you a structured read on each person across all four dimensions, in a form you can use to work out what is driving your best performance, teach it to the people who do not have it yet, and set it as the standard for the team.
Your best rep will probably leave before you would like. The question is whether what made them good stays behind when they do.
Find out how the MyAcumen Team Diagnostic works
