The Peter Principle is the idea that people in a hierarchy tend to be promoted until they reach a role for which they are not competent. Research offers evidence consistent with this idea in sales-to-management promotions, but it is not a proven universal law: success in one job does not always predict success in a different one.
What does the Peter Principle mean?
Laurence J. Peter and Raymond Hull introduced the concept in their 1969 book, The Peter Principle. Its familiar slogan is that employees in a hierarchy tend to rise to their “level of incompetence.” The book is satirical; the slogan should not be treated as a statistically established rule.
The modern organizational question is narrower: do employers promote people for strong performance in their current job even when that performance does not predict success in the next role? A promotion can change the work itself. For example, individual sales ability may help someone succeed as a salesperson, while managing a sales team requires coaching, coordination, and improving others’ results.
What does the research show?
In a 2019 Quarterly Journal of Economics study, Alan Benson, Danielle Li, and Kelly Shue examined sales and promotion data from 131 U.S.-based client firms. The study covered 2005–2011 and included 38,843 workers, of whom 1,553 were promoted to management (Benson, Li, and Shue, 2019).
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The authors found that stronger past sales performance was associated with a greater chance of promotion. They also found that pre-promotion sales performance was negatively related to post-promotion manager value added, measured by managers’ contributions to their subordinates’ sales. The results are consistent with firms favoring high-performing salespeople even when other candidates may have greater managerial potential.
The authors estimated that a counterfactual promotion policy focused on managerial quality would improve average manager quality by 30% in their setting (Benson, Li, and Shue, 2019). This is a study-specific estimate, not a claim that promotions reduce productivity by 30% in every workplace.
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What the study can—and cannot—tell us
The evidence concerns sales workers moving into management at participating U.S. firms during 2005–2011. The measured outcome was managers’ contribution to subordinate sales. It does not establish that the same pattern applies equally across occupations, countries, or promotion systems.
The authors considered alternative explanations, including mean reversion and nonrandom assignment, but their findings remain tied to this sample and measure. They also discuss a trade-off: promoting someone can reward effort in the current role, even if that person is not the best match for the management role. The study supports a possible mismatch between promotion criteria and next-role needs, not the claim that everyone inevitably rises to incompetence.
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The practical implication is to assess candidates against the demands of the role they would enter, rather than relying only on output in their current job. When the next position requires materially different skills, past performance in the old role may be an incomplete signal. The study documents a potential mismatch; it does not test a universal remedy or prove that any particular assessment or training program will solve it.
| Promotion question | What to consider |
|---|---|
| What is being measured? | Current-role output or capabilities needed in the next role? |
| How different is the next role? | Will the person need to manage, coach, or coordinate rather than primarily deliver individual results? |
| Does the performance measure fit? | Does it capture the outcomes expected from the next role, such as team results? |
| What is the trade-off? | Could promotion encourage effort in the current role while producing a weaker match for the next one? |
FAQ
Do people really get promoted to their level of incompetence?
It can happen, but the slogan is not a proven law. Research by Benson, Li, and Shue found evidence consistent with the principle in sales-to-management promotions at participating U.S. firms.
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Does the Peter Principle apply to every workplace?
The available study does not establish that. It examined a particular set of firms, workers, time period, and outcome, so its findings should not be assumed to apply equally to every occupation or organization.
Why might a strong salesperson struggle as a manager?
The jobs can require different abilities. Individual sales performance does not necessarily show whether someone can coach a team or improve subordinates’ results.
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What book introduced the Peter Principle?
Laurence J. Peter and Raymond Hull introduced it in their 1969 book, The Peter Principle. Its satirical framing is distinct from later empirical research on promotion decisions.
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