Promoting your best team members into management roles should improve performance. In many organisations, it quietly does the opposite.
High performers are given teams to lead with little preparation, and expected to deliver through others without ever being shown how. What starts as a reward quickly turns into confusion, inconsistency and, in some cases, underperformance across the team. This is the reality of the accidental manager, and it’s far more common than most organisations realise.
Research cited by Forbes suggests that around 58 percent of managers have never received any formal management training. In the UK, estimates suggest that as many as 82 percent of managers have been promoted without structured development. This definitely happened to me! That means a large proportion of your management population is learning through trial and error, often while leading critical teams.
For HR leaders and senior executives, this is not a marginal issue. It’s a direct lever on performance, engagement and retention.
Why Accidental Managers Impact Performance and Retention
Managers shape how work actually gets done. They influence clarity, accountability and the quality of day-to-day conversations within teams. Team members don’t experience strategy; they experience their manager.
Research from Harvard Business Review highlights the role managers play in shaping employee experience, while McKinsey has shown that organisations investing in leadership capability see measurable improvements in retention and productivity. In some cases, improved management capability is linked to retention gains of around 20 percent.
When managers are underprepared, the impact shows up quickly. Priorities become unclear, accountability weakens and performance conversations are often avoided. Over time, this affects not just results, but culture.
The Three Core Skills Every Accidental Manager Needs
Most accidental managers don’t need more theory, they just need practical support in a few areas that make an immediate difference.
Delegating Effectively as a Manager
One of the biggest shifts in management is learning to stop doing the work yourself.
New managers often default to solving problems because it feels faster and safer. The unintended consequence is predictable. They become overloaded, while their team remains dependent.
Effective delegation means setting clear expectations, giving people the authority to act and agreeing how progress will be reviewed. When done well, it builds capability in the team and frees the manager to focus on higher value work.
Creating Accountability in Teams
Accountability is often misunderstood as pressure. In high performing teams, it’s really about clarity and consistency.
People need to understand what they are responsible for, what good looks like and how their work connects to wider goals. Effective managers create this clarity through clear expectations and consistent follow-up.
When accountability is in place, performance becomes more reliable and far less dependent on constant oversight.
Giving Feedback That Improves Performance
Feedback is one of the most powerful tools a manager has, but it’s often used poorly or avoided altogether.
Some managers dilute their message to keep things comfortable, while others only address issues when they become serious. Neither approach helps people improve.
Effective feedback is timely, specific and focused on development. It gives people a clear understanding of what to continue and what to change. When managers handle these conversations well, performance improves and issues are addressed earlier.
How to Turn Accidental Managers into Confident Leaders
Most accidental managers want to succeed. They care about their team and take their responsibilities seriously. What they typically lack is a clear, practical framework for how to lead.
When organisations invest in developing these three capabilities, the impact is noticeable. Managers become more confident, teams become more accountable and performance becomes easier to sustain.
For HR leaders, this is one of the most effective ways to improve capability at scale without adding complexity.
How Mastery Supports Management Development
At Mastery, we help organisations turn accidental managers into confident, capable leaders. Our programmes focus on the practical skills that make the biggest difference day to day, helping managers delegate effectively, create accountability and give feedback that genuinely improves performance.
The focus is always on application. Managers leave with tools they can use immediately, not theory that sits on a shelf.
If you have talented people who have stepped into management roles without the support they need, it’s worth addressing early.
Visit www.thisismastery.com to find out how we support organisations to build stronger, more effective managers.