Why Good Employees Struggle After Becoming Managers

Good employees struggle after becoming managers because the job they were promoted into is different from the one they were good at. The skills that earned the promotion, such as accuracy, speed and personal output, are not the ones that decide whether a team performs well. The employee did not necessarily become less capable.

The role changed, and the organisation often changed the title without changing how the person was prepared, measured or supported.

This is a leadership readiness gap: an employee is given greater leadership responsibility before developing the capabilities needed to carry it. It is one of the most common and most avoidable problems in growing organisations, and it is usually mistaken for a personality or attitude problem.

What changes when an employee becomes a manager?

An individual contributor is paid for personal output. A manager is paid for what a team produces. That shift changes almost everything about how the work is done, because a manager's value is now created largely through other people and not only through personal effort.

An accountant who closes the books faster than anyone else, or a developer who writes the cleanest code, has spent years being rewarded for doing the work personally. As a manager, the same person is judged by whether the team is clear on priorities, whether standards are consistent, whether problems surface early and whether people are growing. None of that was tested in the old job.

Technical expertise still matters, because it earns credibility and helps a manager judge quality. But it does not answer the questions a new manager now faces: how to set expectations, how to give feedback people can use, what to delegate and what to keep.

The research on promotions points the same way. A study of sales workers across 131 firms, published in the Quarterly Journal of Economics, found that firms tend to promote on current job performance, even though among those promoted, earlier sales performance was negatively correlated with managerial quality.

Workers with more teamwork experience made better managers, yet were not more likely to be promoted. The study looked at sales organisations, so it should not be stretched to every profession, but it raises a fair question for any organisation: what evidence is there that this person can get results through others?

The stakes are high. Gallup's research attributes about 70 percent of the variance in team engagement to the manager.

Why do strong employees become bottlenecks?

Because the habits that made them valuable keep working just well enough to feel like management.

A new manager who is the best problem-solver on the team will usually be asked for answers, and giving them feels like leadership. Decisions begin to travel upward to that person. The team becomes faster in the short term and weaker over time, since nobody else is practising judgement. The manager is busy, often working longer hours than before, and the team still seems slow.

Delegation is where this shows most clearly. Handing work to someone who will do it 80 percent as well as the manager feels like a loss, so the work is either kept or quietly redone.

Many new managers also keep a large part of their old workload, which leaves little time for the people side of the job. A technically excellent employee can therefore become a bottleneck without doing anything careless. The team has become dependent on one person's ability to solve every problem, which is the opposite of what the role is meant to build.

Why is managing former colleagues so difficult?

Because relationships built as peers have to be renegotiated almost overnight. The person who shared complaints about management at lunch is now the one assigning work, reviewing performance and sometimes delivering unwelcome news.

Difficult conversations tend to be delayed, partly to protect friendships and partly because the manager was never taught how to have them. The rest of the team notices what is being left unaddressed, and the manager's credibility suffers more than the delay seemed to cost.

Researchers at the Center for Creative Leadership list leading former peers and holding people accountable among the most common challenges for first-time managers.

In workplaces where age and tenure carry real social weight, as they do in many Nigerian organisations, a manager who is younger than some of the people on the team has another layer to handle.

Is it a training problem or an organisational problem?

Sometimes neither training nor replacing the manager is the answer. A manager may be struggling because the role was never defined, because decision rights are unclear, or because the person is still carrying a full individual workload on top of the team. Training does not fix those problems, and sending the manager on a course only adds to the load.

A useful test is whether the pattern repeats. One manager struggling may point to a mismatch or a gap in that person's preparation. Several managers struggling in similar ways, with decisions escalating upward and strong people stalling after promotion, points to an organisation whose leadership capacity has not kept pace with its growth.

That wider problem is explained in how to know when a team needs leadership training.

Organisations that want a quick read on where they stand can use the 5-Minute Leadership Capacity Check.

What should manager development include?

It should build the capabilities the new role actually requires: delegating and following up, setting clear expectations, giving direct feedback, holding difficult conversations, making decisions with incomplete information, and managing former peers.

Self-leadership matters here too, since a manager who cannot manage personal time and reactions will rarely manage a team's.

Format matters as much as content. A single seminar rarely changes how a manager behaves on Monday morning. Development works better when managers practise in realistic situations, receive feedback, apply ideas to real work and have a mentor to think through hard cases with.

The need is well documented: CCL's research found that nearly 60 percent of first-time managers received no training when they moved into the role, and 26 percent felt they had not been ready to lead others.

Organisations that take this seriously usually begin by finding where their managers are actually struggling, then build leadership training for managers around those gaps, not around a generic curriculum.

The real measure of a manager is not how much the manager personally produces. It is whether the team performs well when the manager is not in the room, whether problems reach the manager early, and whether people are growing. A programme should be judged against those outcomes.

Promotion is not development

A promotion changes a title and a salary in a day. Capability takes longer. Organisations that promote first and wait to see whether the person copes are using the team as a training ground, and the cost is paid in lost time, weak decisions and good people who leave.

Penthouse Leadership Academy works on this gap before it becomes a crisis. Its Corporate Edition begins with a survey to identify leadership gaps, designs a programme around what the survey finds, delivers it through practical exercises, simulations, projects and mentorship, and progress reports. The focus is on developing people before the organisation urgently needs them to lead.

Organisations still deciding whether managers are the problem can start with the 5-Minute Leadership Capacity Check. Those already looking for a way to develop their managers can book a conversation with Penthouse.

Frequently asked questions

Why do good employees make bad managers? Usually, they are not bad managers but unprepared ones. The role rewards different work from the work they were promoted for, and most organisations do little to prepare them. The struggle typically shows up in delegation, feedback and managing former peers.

What is the difference between an individual contributor and a manager? An individual contributor creates value through personal output. A manager creates value through the output, decisions and development of a team.

Does technical expertise make someone a good manager? Not by itself. Technical expertise builds credibility and helps a manager judge quality, but managing also requires separate capabilities such as delegation, clear feedback and difficult conversations.