You do your job well. The company promotes you. You do the new job well, and the company promotes you again. Somewhere up that ladder you reach a post you cannot handle, and there you stay, because nobody hands back a promotion. Laurence J. Peter and Raymond Hull put a name to that pattern in 1969: the Peter Principle.
It reads like satire, and it was written as satire. Underneath the jokes sits a problem every organisation recognises. Promotion is used as a reward, and a reward is not a measurement of what the next job demands.
Here is what follows. I will walk you through what the principle claims, its two corollaries, why hierarchies keep pushing people upwards, the classic cases, what the research actually shows and what you can do about it, in a company and in your own career.
What is the Peter Principle?
The Peter Principle, also known as the principle of incompetence, holds that in a hierarchical organisation an employee who does their job well tends to get promoted. If they perform again in the new post, they move up once more. The climb continues until they reach a position they are not equipped for. At that point the career stalls. They are not promoted again because they no longer stand out, and they are rarely sent back down because nobody takes a promotion away.
Two things follow. Posts of responsibility tend to end up in the hands of the people least prepared for them, and the real work is carried by those who have not yet reached their level of incompetence.
One word needs untangling, because it causes most of the confusion. Incompetent here does not mean clumsy or lazy. It means the skills that made you shine in one role are different from the ones the next role demands. A brilliant salesperson can be a mediocre sales director without ever having stopped being excellent at selling.
The 1969 book
Laurence J. Peter (1919-1990), a professor of education, and the journalist Raymond Hull brought the idea to a wide audience in The Peter Principle: Why Things Always Go Wrong (William Morrow, 1969). Written with a very dry humour, it presented the principle as the finding of an invented discipline called hierarchiology, and it became a management classic.
The two corollaries
Two corollaries sum up the logic:
- In time, every post tends to be occupied by an employee who is incompetent to carry out its duties.
- The real work is done by those who have not yet reached their level of incompetence.
They sound like a joke. They describe a tendency, and the taller and more stable a hierarchy is, the more likely you are to run into it.
Why hierarchies keep pushing people upwards
The principle does not come from negligence. It comes from a decision that looks sensible: reward good performance with a promotion. The trouble is that performance is measured in the current job, while the promotion demands a different set of abilities. You evaluate what has already been proven and you gamble on what has not been done yet.
The table below sums up that mismatch:
| Current role (what is rewarded) | New role (what is needed) |
|---|---|
| Executing technical tasks with mastery | Leading other people |
| Getting good results on your own | Getting results through a team |
| Mastering a specific subject | Coordinating, delegating and prioritising |
| Solving known problems | Deciding with incomplete information |
Then comes the bad incentive. Promotion is usually the only visible path forward, so plenty of people accept management jobs they never wanted. The company loses a good specialist and gains a mediocre manager. Economists call this the clash between output and allocation: motivating each person and placing each person where they perform best do not always point the same way.
Classic examples of the Peter Principle
The book is full of cases. Two get quoted most often:
- The mechanic promoted to foreman. He repaired engines efficiently, so he was made head of the workshop. From behind the desk he cannot stop meddling in his subordinates’ work. He takes over their repairs, frustrates them and neglects what was actually his job, running the workshop.
- The teacher turned supervisor. She stood out with children, so she was promoted to primary-school supervisor. Dealing with adults and bureaucracy instead of pupils, the techniques that once worked for her turn useless and friction with the staff appears.
The pattern repeats. People are promoted for what they did well and then fail at what the new role demands. In technology the equivalent is the brilliant programmer turned project manager who cannot prioritise or delegate.
The Dilbert Principle: the cynical version
The cartoonist Scott Adams proposed an even sharper variation. He set it out in a 1995 article in The Wall Street Journal and developed it in the book The Dilbert Principle (1996). Under the Dilbert Principle, incompetent employees are promoted on purpose so they can no longer do damage on the front line. They are moved into a management post where their real impact is smaller. The reasoning is that in many companies the productive work happens at the bottom, and the upper levels weigh less on the final result.
It is a satirical hypothesis with plenty of critics, who deny it any value beyond a laugh. What separates it from the Peter Principle is intent. With Peter the company makes an honest mistake by rewarding people with promotions. With Dilbert it promotes precisely to move them out of the way.
Is the Peter Principle real? Evidence and criticism
The principle started as an ironic observation. Research has since tested it as a serious hypothesis, and the effect shows up under certain conditions.
The most cited empirical work is «Promotions and the Peter Principle», by Alan Benson, Danielle Li and Kelly Shue (The Quarterly Journal of Economics, 2019). They analysed the promotions of almost 40,000 sales workers at 131 firms and found a pattern consistent with the principle. The best sellers were the ones promoted most, and as managers they tended to be worse leaders. Firms face a genuine dilemma between promoting the best salesperson and promoting the best candidate for the manager job. The authors summarised it for Harvard Business Review.
Theory had already flagged the problem. Edward P. Lazear modelled in «The Peter Principle: A Theory of Decline» (Journal of Political Economy, 2004) how performance observed in one post overstates performance in the next. James Fairburn and James Malcomson showed in «Performance, Promotion, and the Peter Principle» (Review of Economic Studies, 2001) that using promotions as an incentive can collide with placing each person where they are most productive.
The evidence also qualifies the idea. The principle describes a tendency, and it depends on how promotions are run. Companies that assess potential for the target role, or that offer parallel technical careers, cut the problem sharply. Today’s labour mobility also makes it harder than decades ago for someone to spend years stuck in a job they are not fit for.
The Peter Principle in IT teams
Technical work is especially exposed to this trap, for an uncomfortable reason: individual output is easy to measure. Tickets closed, incidents resolved, code shipped, a project delivered on time. All of it gives a clear signal of competence. What those numbers cannot see is whether the same person will run a team well, set priorities, defend their people and say no to stakeholders. The developer who spent years becoming excellent at building software can be promoted into management on the strength of skills the new job barely uses.
The usual path, from senior developer to team lead to engineering manager, mixes two trades that look continuous and are not. Leading is a separate discipline, learned on the job and rarely taught beforehand. The most effective counterweight is the individual contributor (IC) track: parallel roles such as senior, staff or principal engineer that let you grow in scope, pay and influence without taking on people management. Where that ladder exists, the choice stops being «manage or stagnate», and strong technicians no longer have to leave the work they do best in order to advance.
What can be done about it
In organisations
- Separate the reward from the promotion. Pay rises, bonuses and important projects retain talent without putting it where it does not perform.
- Create a parallel technical career. A specialist track that lets people grow without managing others keeps your best technical staff from leaving.
- Promote for fit with the target role. Assess managerial skills, not only results in the current job, and provide training beforehand.
- Define roles clearly. Knowing what each post decides reduces the friction of a poor fit. A sound policy of roles and permissions helps.
- Normalise stepping back. If reassigning someone to their previous job is not experienced as a punishment, it is easier to correct a mistake in time.
At the individual level
- Know your limit. Becoming aware of what you are not good at is the first step to stop doing it badly. Peter himself pointed to this as the remedy.
- Decide whether you want to manage. A promotion into management is only one way to progress, and for plenty of people it is the wrong one.
- Train for the new job. Ask for feedback, find a mentor and learn what the role demands, not what you already knew how to do.
- Negotiate the alternative. More technical responsibility, a better salary or more autonomy can be worth as much as a manager’s title.
- Look after your personal organisation. A tidy schedule and environment help sustain performance. The Pomodoro Technique or organising your desktop are a good starting point.
Frequently asked questions
Is the Peter Principle real?
There is evidence that the tendency appears under certain conditions. The study by Benson, Li and Shue (2019) found that promoting on individual results can lead to worse managers. How strong the effect is depends on how people are selected and promoted.
What is the difference between the Peter Principle and the Dilbert Principle?
Peter describes an unintended mistake. People who perform well are promoted until they reach a job that defeats them. Dilbert claims that companies promote the incompetent on purpose, to move them away from where they would do harm.
How can a company avoid the Peter Principle?
By separating recognition from promotion, creating a parallel technical career, promoting for fit with the target role instead of performance in the current one, and normalising reassignment when a promotion does not work out.
The bottom line
Nothing in the Peter Principle says you are incompetent. It says organisations tend to promote on the strength of what was done well and then demand something different. That changes the question you should ask about yourself and about your team. Drop «are they doing well?» and start asking «are they well placed for what comes next?». Then act on the answer. Separate reward from promotion, build the parallel technical track and make a step back easy to take. The companies that do it keep their best specialist in the work that specialist does best.