Signs Your Managers Were Promoted Without Ever Being Taught to Manage

A quiet thing happens in most organisations the day a strong performer becomes a manager. On Friday they were the best analyst, the top biller, the engineer everyone asked for help. On Monday they are responsible for the performance, motivation and difficult conversations of five other people — a job with almost nothing in common with the one they were promoted for. And in the overwhelming majority of cases, that is the entire preparation they receive. No training. No rehearsal. A new title and a team, and the assumption that competence in one domain will transfer to a completely different one.

It usually doesn’t transfer, and when it doesn’t, we reach for the wrong explanation. We say the person isn’t a natural leader, or isn’t cut out for management, as though what’s missing is a trait. Far more often what’s missing is teaching and practice. This piece is about learning to tell the difference — because the signs of a manager who was never taught to manage are recognisable, and reading them correctly changes what you do next.

What is an “accidental manager”?

The term belongs to the Chartered Management Institute, and the number behind it is striking. In its 2023 research with YouGov, surveying more than 4,500 workers and managers, the CMI found that 82 percent of managers who move into management have had no formal management or leadership training — people who became managers by accident of promotion rather than by design. The same research found that a third of workers have left a job because of a negative workplace culture, the kind that poorly-equipped managers tend to produce without meaning to.

So the accidental manager is not a rare failure case. It is the norm. When you look across your own management layer, the base rate says four in five of them were handed the role without being shown how to do it. That single fact should reframe how you interpret almost every management problem you see, because it means the default explanation — “we picked the wrong person” — is usually less accurate than “we picked a capable person and skipped the part where we taught them.”

Why do organisations keep promoting people who then struggle?

Because we promote on the wrong signal, and we do it systematically. The most rigorous evidence for this comes from economists Alan Benson, Danielle Li and Kelly Shue, whose study Promotions and the Peter Principle, published in the Quarterly Journal of Economics in 2019, examined sales-worker and promotion data across 214 firms. They found that companies reliably promote their best salespeople — and that strong sales performance actually predicts worse managerial performance once promoted. The very trait that earns the promotion is uncorrelated, sometimes negatively correlated, with the ability to lead the team. Other observable signals predicted managerial quality better; firms largely ignored them and rewarded past individual output instead.

This is the mechanism behind the accidental manager. We take the person who was best at the individual job, reward them with a job that requires a different skill set, and then act surprised when excellence at the first doesn’t guarantee competence at the second. It isn’t a hiring accident or a run of bad luck. It is a structural habit — promoting for yesterday’s performance rather than for the capability the new role actually demands, and then providing no bridge between the two.

What are the signs someone was promoted without being taught to manage?

The pattern shows up in behaviour, and once you know what you’re looking at it’s hard to unsee. The most common signs, in my experience of watching capable people struggle in the role:

They keep doing the old job. The new manager stays in the work they were good at — writing the code, closing the deals, redoing the junior’s draft — because that’s where they feel competent and it’s what got them here. Delegating means letting go of the thing they were rewarded for, and doing the actual manager’s job, which no one taught them, so they retreat to what they know.

They avoid the conversations that define the role. The underperformance that isn’t addressed, the feedback that never comes, the disagreement that gets smoothed over rather than resolved. These are the moments where management actually happens, and they are precisely the moments an untaught manager has never practised. So they wait, hope it resolves itself, and let small problems compound.

Feedback is either absent or blunt. With no practice at the calibrated middle — direct and kind at the same time — the untaught manager tends to swing between silence and bluntness. Nothing is said for months, then it comes out badly under pressure. Both are the same missing skill.

They are inconsistent, and the team notices. Different standards on different days, decisions that seem to depend on mood, rules applied to one person and not another. This usually isn’t favouritism; it’s the absence of a settled way of operating that only comes from having thought through — and rehearsed — how you handle recurring situations.

Their good people start to leave. This is the lagging indicator, and the most expensive one. Gallup’s analysis of 2.7 million employees found that managers account for at least 70 percent of the variance in team engagement — the single largest controllable factor in whether people stay and do their best work. When a team’s strongest performers begin drifting away while the same team next door is stable, the manager is usually the variable that changed.

None of these is a sign of a bad person. Every one of them is a sign of a specific skill that was never taught and never practised.

Why aren’t these signs a character flaw?

Because the alternative explanation doesn’t survive contact with the evidence. If struggling managers were simply the wrong personalities, you’d expect trained and untrained managers to fail at roughly the same rate — personality being fixed. They don’t. The CMI found that managers who have had formal training behave measurably differently, including being more willing to address bad behaviour and raise concerns. The gap between the manager who avoids the hard conversation and the one who has it isn’t a gap in character. It’s a gap in preparation.

There is a genuine selection problem underneath this — Gallup’s work suggests only about one in ten people bring a high natural talent for the role, and that companies pick the candidate with the right talent only around 18 percent of the time. That is a real argument for choosing managers more carefully. But talent is a starting distribution, not a verdict. The far larger and more actionable truth is that most managers are operating without the skills the job requires, not because they lack the raw material but because no one ever built the skills or gave them a place to practise. Calling that a character flaw is both unfair and, more importantly for a business, useless — because it points you toward replacing people when the real fix is developing them.

What does it cost to leave this unaddressed?

The costs are the ones that rarely get traced back to their source. The regretted resignation logged as “left for a new opportunity,” when the truer reason was a manager who never learned to have a career conversation. The team that quietly stops raising problems because the last person who did got a sigh and a “yes, but.” The performance issue that festers for a year because the conversation kept getting postponed. Each one reads, in isolation, as an individual event. In aggregate they are the predictable output of a management layer that was never taught the job — and they compound, because an untaught manager also can’t develop the people under them, so the gap propagates downward.

The encouraging half of this is that the same leverage runs in reverse. If managers account for 70 percent of the variance in engagement, then improving manager behaviour is the highest-yield move available to most organisations — not a soft investment but the one with the largest measurable effect on retention and performance. The problem is concentrated in one place, which means the solution can be too.

What should an L&D or People leader do about it?

Start by re-reading the signs as a diagnosis rather than a judgement. The manager who won’t delegate, avoids the hard conversation, or gives feedback badly is showing you exactly which skills were never built — that’s useful information, not a verdict on the person. The instinct to sideline or replace them is usually the expensive mistake; you’d be discarding a capable performer to solve a training problem.

Then fix the actual gap, which is practice. The reflex is to send accidental managers on a course, but the reason management skill doesn’t stick is the same reason you can’t learn to drive from a lecture: these are performance skills executed under emotional load, and they form through repetition under realistic conditions, not through exposure to content. A manager who has rehearsed the underperformance conversation a dozen times — against a realistic reaction, with the freedom to get it wrong and try again — walks into the real one with something the course could never give them: reps. That builds the thing untaught managers most visibly lack, which is confidence born of having done it before, not confidence borrowed from a slide.

This is the logic HumanVantage is built on. Managers practise the specific conversations the role turns on — the feedback, the underperformance, the disagreement, the retention conversation with someone you can’t afford to lose — in a safe environment where failure costs nothing and repetition is unlimited, so the capable performer you promoted actually becomes the manager you promoted them to be. The aim is never to grade managers or catch them out. It is to give the accidental manager the one thing the promotion forgot to include: the chance to practise the job before it’s real.

The signs that someone was promoted without being taught to manage are not a reason to doubt the person. They are a reminder that we handed a hard, learnable job to a capable adult and skipped the learning. Read them that way, and the response becomes obvious — not who to move out, but what to help them practise.