Peter principle
In a hierarchy, people are promoted for doing their current job well until they reach a job they cannot do well, where they stay. The best individual contributor becomes a poor manager because the skills differ.
What drives it
Explains why so many managers struggle in ways that look like character flaws: the promotion system rewarded the wrong skill. Useful for identification because it separates incompetence in a role from incompetence as a person.
How it shows
Work
In the promoted leader: still doing the old job (the star engineer rewriting the team’s code at midnight), avoiding the management parts such as feedback, hiring and conflict, and anxious control of detail. In the team: work routed around the manager to people who can decide, a once-respected colleague becoming defensive and brittle. As the leader: watch who you promote because you need to reward them rather than because they fit the role, and whether you have built any path to reward experts without making them managers. You may also be at your own ceiling as the company outgrows the founding role.
Relationships
Family businesses promote by bloodline rather than performance, which can skip the principle and place someone in a role they were never tested for. The person often knows it and overcompensates.
Self
Missing the old work, feeling competent only when you go back to it, dreading parts of the new role and filling the diary to avoid them. A quiet sense of being found out.
What tells it apart
Impostor phenomenon: The impostor feels incompetent despite evidence of competence; the person at their Peter ceiling is struggling by observable measures, and the anxiety is accurate.
Confidence-competence gap in leader selection: The confidence-competence gap is about overconfident people being picked; the Peter principle hits people who were genuinely good at the previous job and often know they are struggling.
Founder syndrome: Founder syndrome is about not letting go of an organisation one created; the Peter principle is about a promotion into a role with different demands, and the person may be happy to hand back control.
A test
Compare the person’s performance on the parts of the job that are the same as before with the parts that are new; a sharp split points to the Peter principle rather than general decline.
Questions to carry
- How does the person do on the parts of the job that stayed the same, compared with the new parts?
- Which promotion or new role asked for skills I didn't have, and what did I tell myself about struggling?
How strong the research is
moderate. Began as satire; the best field evidence (Benson, Li and Shue, 2019, on sales staff) supports the mechanism that firms promote on current performance rather than fit for the next role, but evidence across other jobs is limited.
Where it comes from
Laurence J. Peter and Raymond Hull, 1969