The Peter Principle: Why great performers become struggling managers

The Peter Principle was formulated by Dr Laurence J. Peter in his 1969 book of the same name. The central observation is disarmingly simple: in a hierarchy, employees tend to be promoted based on their performance in their current role. Promotions continue until the person reaches a role where they are no longer competent – their ‘level of incompetence.’ At that point, promotions stop, and the individual remains stuck in a role they can’t perform effectively.

The consequence, Peter argued, is that over time, every position in a hierarchy tends to be occupied by someone who is not competent to fulfil its duties. The work gets done by those who have not yet reached their level of incompetence.

While the original book had a satirical tone, the underlying dynamic is real and well documented. Research has consistently shown that organizations promote people based on current performance rather than future capability, and that the skills that make someone excellent in one role are often quite different from the skills required in the next.

The Peter Principle is driven by a simple assumption: that success in one role predicts success in the next. In many cases, it doesn’t. A brilliant engineer isn’t automatically a good engineering manager. An outstanding salesperson doesn’t necessarily make a strong sales director. The skills that drive individual contribution – technical expertise, personal productivity, deep subject knowledge – are fundamentally different from the skills that drive management success: communication, delegation, coaching, strategic thinking, and emotional intelligence.

Organizations compound the problem by using promotion as the primary reward mechanism. When the only way to recognize and reward excellent performance is to promote someone into a management role, the system creates a structural incentive to move people out of roles they’re good at and into roles they’re not prepared for.

The problem isn’t ambition or even capability: it’s the absence of deliberate development for the next role. Someone is promoted into a management roles and expected to figure it out, often without training, coaching, or a clear understanding of what the new role actually requires. The transition from individual contributor to manager is one of the biggest career shifts anyone faces, and most organizations leave people to navigate it alone.

Promote based on future capability, not just current performance

Assessment for promotion should evaluate whether the individual has – or can develop – the skills needed for the next role, not just whether they’re excelling in the current one. This requires a clear competency framework for each level, and an honest assessment of readiness. Tools like the Manager Skills Assessment can help identify whether someone has the management capabilities needed before the promotion happens.

Invest in transition support

The move from individual contributor to manager – and each subsequent step up – requires deliberate development, not just a new title. Provide new managers with structured onboarding, coaching, and access to the skills they need: delegation, feedback, difficult conversations, team development. The Mindtools Content Hub has resources specifically designed for leadership transitions, and our Manager Skill Builder creates guided learning paths for new and developing managers.

Create alternative career tracks

Not everyone wants to manage – and not everyone should. Organizations that offer only a management ladder force talented individual contributors into management roles they don’t want and aren’t suited for. Dual career tracks – with a technical/specialist path that offers equivalent recognition, compensation, and progression to the management path – give people a way to grow without leaving the work they’re best at.

Build a coaching culture

When managers have access to coaching – whether from a formal coach, a trained internal coach, or an AI-powered tool like Ask M: Coach – they’re far more likely to navigate the transition successfully. Coaching provides a safe space to reflect on challenges, develop new skills, and build the self-awareness that effective management requires.