The Dunning-Kruger effect describes a specific and well-documented cognitive pattern. Confidence is high. Competence is low. The person performing does not know enough yet to understand how much they do not know, so they overdo the confidence.
It is a problem in most fields. In sales it is a particular one, because confidence sells. A new rep who does not yet know what they are doing can still produce results in the early weeks, simply by turning up the dial on the thing they do have. The appearance of conviction moves conversations forward even when the underlying skill is not there yet. And that creates a cycle I have watched repeat itself across hundreds of sales hires over three decades.
Month One
The new rep arrives. They cannot sell yet, not really. They do not have meaningful product knowledge. They have not absorbed the playbook. What they have is enthusiasm and the natural confidence of someone who has not yet encountered the limits of their own capability.
They turn that confidence up and they go to work.
Month Two
Something happens. The rep gets a run of sales. The company is thrilled. They hired a winner. The numbers are moving. Everything is peaches.
And here is where the damage begins, not in the failure but in the success.
The onboarding gets deprioritised. The playbook training gets skipped or rushed. The management cadence loosens because the rep has proved they can do the job, so why hover. The KPIs feel like formality rather than infrastructure.
My dad had a line about sales recruitment that I have found more useful with every passing year. ‘It is never whether they CAN do the job. It is whether they WILL do the job’. That distinction matters enormously in month two, when the early results create an environment where accountability quietly disappears.
Month Three
The rep has now formed a belief about themselves. They are naturally talented. They have an instinct for this. The playbook is for people who need training wheels. Their way works fine.
What they actually have at this point is no developed skill, no grounding in the process, and the enthusiasm that carried them through the first month starting to fade. The early results came from energy and novelty. Neither of those is a renewable resource.
Sales drops. Significantly. Often to zero.
Month Four
The company looks at the previous month’s numbers and decides it was probably just a rough patch. They had a killer month not long ago. The rep talks around the underperformance, and the company accepts whatever explanation is offered because the memory of that early success is still doing a lot of work in their perception of the hire.
From here, the situation usually resolves one of two ways.
The first, and this is the minority outcome, is that the rep recognises the gap and becomes what I call a student of the game. They go back to the playbook. They invest in understanding the craft properly. They accept that the early results were not evidence of innate talent but of circumstances that no longer apply. These reps become genuinely good over time. They are worth the investment and the patience.
The second outcome is what I call the sales recruitment merry-go-round. The company allows the underperformance to continue for six months because the early results have created a perception that the hire is fundamentally sound and just going through a rough patch. Then they spend two months managing the rep out. That is twelve months of salary, management time, and opportunity cost. In most cases that number lands somewhere around a hundred and twenty thousand dollars. Spent on a rep who produced real results for one month and coasted on the memory of them for the remaining eleven.
What the Big First Month Actually Tells You
It is not a predictor of success. It is frequently the opposite. A rep who performs strongly before they have product knowledge, before they have internalised the playbook, before they have developed any real commercial skill, is demonstrating that they can sell on confidence alone. That is a transferable skill but it is not a durable one. Confidence without competence has a short shelf life, and when it runs out there is nothing underneath it to fall back on.
The hire that should worry you is the one who hits immediately and then stops improving. The hire worth backing is the one who starts slower, asks more questions, takes the playbook seriously, and builds results methodically rather than through sheer front.
The Real Fix
Before you invest in a sales rep, you need three things in place. A proper playbook that gives them something real to work from. An ongoing training and coaching structure that does not get abandoned the moment they produce early results. And a management plan with enough rigour to hold the rep accountable through the inevitable dip that follows the early confidence phase.
Without those three things, you are not managing a sales hire. You are participating in a merry-go-round and eventually paying the exit price.
At Outsold we see this cycle constantly, which is one of the reasons we build the playbook and the management infrastructure before recommending that a client brings on a rep. The rep is only as good as the system they are placed into. For more on how that works in practice, there is more at www.outsold.com.au/blogs.
