Most people assume that impostor syndrome is something you grow out of. That enough wins, enough evidence, enough years in the room will eventually quiet the voice telling you that you do not belong there. The logic makes sense, yet the research says otherwise.

A systematic review published in BMC Psychology in 2025, analysing 30 studies and over 11,000 individuals, found a global prevalence of impostor syndrome sitting at 62%. Survey data specific to entrepreneurs puts the figure at 87%. A Korn Ferry survey in 2024 found that 71% of US CEOs report experiencing it. These are not people who have not yet proved themselves. They are people who, by any external measure, already have.

The pattern I kept finding when I looked into this is that success does not dissolve impostor syndrome. For many founders, it compounds it. Understanding why requires looking at what is actually happening psychologically, because the mechanism is not obvious from the outside.

The cycle that does not shrink

Pauline Clance, the psychologist who first identified and named the phenomenon in 1978, described what she called the impostor cycle. When someone with impostor syndrome faces an achievement task, they respond in one of two ways: they over-prepare obsessively, or they procrastinate until the deadline forces action. Either way, they complete the task. There is a brief moment of relief. Then a new challenge arrives, and the cycle starts again.

The critical thing Clance documented is that the cycle does not get smaller with each repetition. It stays the same size, or it grows, because the stakes attached to each new challenge rise as the career advances. A founder in year one fears being found out in a small room. A founder in year five fears being found out in front of a team, investors, press, and customers. The evidence of competence accumulates. The audience for potential failure expands at the same rate.

Research following individuals with impostor syndrome over time found it to be a stable individual difference — it does not naturally erode. The cycle runs indefinitely unless something changes in how the person processes achievement.

Why getting better at something makes you feel less certain

There is a cognitive mechanism here that I find genuinely useful to understand, because it reframes the feeling of increasing self-doubt not as irrationality but as the predictable product of growing expertise.

Kruger and Dunning’s research at Cornell, published in 1999 and one of the most cited papers in social psychology, established what became known as the Dunning-Kruger effect. The original finding was about incompetence: people in the bottom quartile of performance on tests of logic and reasoning dramatically overestimated their abilities, rating themselves in the 62nd percentile when they were actually in the 12th. They lacked the metacognitive skill to recognise their own limitations.

The less discussed half of that research is what happens at the other end. High performers in the top quartile consistently underestimated their abilities relative to others. The reason is the false consensus effect: tasks that feel straightforward to an expert feel straightforward because of expertise, but the expert assumes they must feel equally straightforward to everyone else. Competence makes difficulty invisible to the person who has mastered it.

For founders, this translates directly. A founder with two years of experience does not yet know enough to understand how much can go wrong. A founder with eight years of experience understands every failure mode, every way a good plan can collapse, every moment in their own history where luck played a larger role than skill. The more you know, the more visible the gap becomes between what you understand and what you would need to know to feel genuinely certain. Expertise does not produce confidence. It produces a more accurate map of the terrain, which includes everything that could still go wrong.

The perfectionism loop

Research consistently finds a strong relationship between perfectionism and impostor syndrome, and the mechanism connecting them matters for founders specifically.

Maladaptive perfectionism, the kind that is driven by fear of failure rather than genuine standards, ensures that the internal benchmark rises to match every external achievement. A entrepreneur who reaches a milestone they once thought would make them feel successful finds that the milestone, once reached, no longer feels like enough. The goalposts moved. They always move. Because the function of the perfectionist standard is not to be met. It is to maintain a gap between where the person is and where they would need to be to feel legitimate.

Studies I came across on this found that individuals with maladaptive perfectionism who experience impostor syndrome show higher rates of anxiety, self-criticism, and negative self-evaluation, and are significantly more likely to attribute success to external factors while internalising failures. The result is a founder who works harder than almost anyone around them, produces results that others can see clearly, and experiences almost none of the satisfaction those results should generate.

A study of 353 professionals found that performance pressure had a positive effect on impostor syndrome across key dimensions including competence doubt and alienation, regardless of actual performance level. As businesses scale, performance pressure only increases. The Dunning-Kruger inversion and the perfectionism loop compound each other: expertise raises awareness of complexity, perfectionism ensures the internal standard keeps pace, and performance pressure amplifies both.

What it costs the business

This is worth naming directly because impostor syndrome is often treated as a personal experience with no operational consequences. The research suggests otherwise.

The most comprehensive recent workplace review of the phenomenon, published in the Journal of Organizational Behavior in 2024, found that impostor syndrome in leaders produces measurable risk aversion and indecisiveness at the exact moment the business requires bold decisions. Entrepreneurs who cannot internalise their competence become progressively more cautious as the stakes rise, not because the risks are greater, but because the fear of being exposed in a high-visibility failure grows with every increase in visibility.

The delegation problem compounds this. Trusting team members requires believing you have something worth building and people capable of helping you build it. A entrepreneur running significant impostor syndrome finds delegation threatening at a psychological level, because relying on others feels like exposing a gap. The result is overwork, bottlenecks, and a team that cannot develop autonomy because the entrepreneur cannot release control.

Employees with persistent impostor feelings also report lower career motivation and higher rates of burnout. The pattern moves through an organisation. A entrepreneur who cannot internalise their own legitimacy creates an environment where others find it harder to internalise theirs.

If what you are reading here maps closely onto your experience, particularly if the self-doubt is persistent rather than situational and is affecting how you make decisions or lead your team, that is worth exploring with a psychologist rather than an article. A professional can look at the specific patterns in your particular situation in ways that general research cannot.

You are not alone in this, and the company you are in matters

87% of entrepreneurs report having experienced impostor syndrome during their careers. 71% of US CEOs in a 2024 survey said they experience it. Searches for the term increased by 75% in 2024 alone, though some of that likely reflects growing awareness of the language rather than a genuine increase in the experience itself.

What these figures tell me is not just that the experience is common, but that it is disproportionately common among people who are building things, leading organisations, and operating under sustained performance pressure in public. The profile of entrepreneurship creates almost ideal conditions for impostor syndrome to develop and persist: high visibility, high stakes, constant novelty, and a culture that rewards projected confidence while penalising visible doubt.

The founders around you who look certain are, at a rate approaching nine in ten, navigating some version of what you are describing. They are not saying it because the culture has not made it safe to say. That is not a small thing. It means the comparison you are making between your internal experience and their external presentation is a comparison between two fundamentally different things.

Your doubt is not evidence that you do not belong. In many cases, it is evidence that you understand the terrain well enough to know what is actually at stake. The people who feel no doubt are often the ones who have not yet looked closely enough.

Working with it rather than waiting for it to pass

The research is fairly clear that waiting for enough success to resolve impostor syndrome is a strategy that does not work. The cycle is stable over time. More success raises the stakes without changing the attributional style that filters out the evidence of competence.

What does appear to help, based on what I found across the research, is working on the attributional style directly rather than accumulating more evidence. This means practising the deliberate attribution of success to skill and preparation, not as an affirmation exercise, but as a cognitive correction to a documented bias. Every time a success gets attributed automatically to luck or timing, pausing to ask what specific competence or decision contributed is a small intervention on the filter itself.

The second is externalising the internal standard. A founder whose perfectionist benchmark exists only in their own head has no way to know whether it is calibrated to reality or to fear. Making the standard explicit, writing down what success would actually look like for a specific project before beginning it, creates a reference point that is not subject to post-hoc inflation.

The prefrontal cortex within your brain handles this kind of deliberate cognitive reappraisal. The amygdala drives the automatic threat response that interprets ambiguous situations as evidence of fraudulence. Slowing the interpretive process enough to route it through the prefrontal cortex rather than the amygdala does not eliminate the feeling, but it changes what happens next. The feeling becomes information rather than verdict.

A book worth reading alongside this

Mindset by Carol Dweck is the most directly relevant book I can point to for this. Dweck’s research on fixed versus growth mindset maps precisely onto the perfectionism and attributional style mechanisms the article describes. Founders with a fixed mindset treat every challenge as a potential exposure of innate limitations, which is exactly the cognitive architecture that makes impostor syndrome most persistent and most damaging. Dweck spent decades studying why some people respond to difficulty with curiosity and others with withdrawal, and the book translates that research accessibly without losing the rigour behind it. The original research papers are cited throughout for anyone who wants to go deeper.

This article discusses psychological patterns documented in research on entrepreneurial behaviour and founder mental health. It is not designed to identify, diagnose, or assess any psychological condition, and it is not a substitute for professional support. The patterns described here are common and well-documented — recognising yourself in them is not a cause for alarm. If, however, you find that these patterns are significantly affecting your work, relationships, or wellbeing, speaking with a psychologist or therapist can provide personalised guidance that an article cannot.

This article is for educational and informational purposes only. It is not a substitute for professional psychological advice, diagnosis, or treatment. If you are experiencing significant psychological distress, please consult a qualified mental health professional.

Sources: Clance & Imes (1978), Psychotherapy: Theory, Research and Practice, 15(3). Bravata et al. (2020), Journal of General Internal Medicine, 35(4), n=14,161. Kruger & Dunning (1999), Journal of Personality and Social Psychology, 77(6). Sakulku & Alexander (2011), International Journal of Behavioral Science, 6(1). Pannhausen et al. (2020), Current Psychology. Gullifor et al. (2024), Journal of Organizational Behavior. BMC Psychology meta-analysis (2025), n=11,483, 30 studies. Korn Ferry CEO Survey (2024). Jackson (2018), Emerging Leadership Journeys, 11(1).