Self-Doubt as an Entrepreneur: When It Protects and When It Paralyzes

Why self-doubt is more widespread among owners than it seems

From the outside, owners usually appear confident. They negotiate prices, lead employees, and present to customers. Inside it often looks different. Many ask themselves whether their success was mostly luck, whether the next tender will show that they cannot really do it, and whether their employees would notice how unsure they sometimes are. This is rarely talked about, because doubt does not fit the image of the entrepreneur.

At the same time, research shows that the opposite, excessive confidence, is a well-documented risk. This essay therefore asks: When does self-doubt protect an entrepreneur from mistakes, and when does it paralyze them?

To answer it, I first clarify the terms, then introduce a model that distinguishes two paths of doubt, summarize what studies show, and weigh two readings. At the end there is a simple check with which a doubt can be classified.

Self-doubt, self-efficacy, impostor thoughts: the terms

Self-doubt here means uncertainty about whether one is up to a task. It can be directed at a specific task, such as a large quote, or at one's own person as a whole. This distinction becomes important later.

Its counterpart is self-efficacy, a term coined by the psychologist Albert Bandura: the belief that one can master a task through one's own actions. It is not the same as optimism. The article optimism and realism describes optimism as the tendency to expect good outcomes, and overconfidence as the assessment that one's own abilities and chances are higher than those of others or than the numbers suggest.

A special form of doubt is impostor thoughts. In 1978 the psychologists Pauline Clance and Suzanne Imes described a pattern among successful women that they called the impostor phenomenon: the fear of being exposed as an intellectual fraud, even though the successes are real. The organizational researcher Basima Tewfik (2022) sharpened the term. She defines workplace impostor thoughts as the belief that others overestimate one's competence. In a review of the research, Tewfik, Yip, and Martin (2025) recommend putting precisely this core at the center, because otherwise the term blurs with anxiety, perfectionism, and low self-esteem.

The thinking model: two paths a doubt can take

Tewfik (2022) starts from an observation that Clance and Imes had already noted: people with the impostor phenomenon were often described by others as empathetic and socially adept. She explains this as follows: whoever believes they are less competent than others think experiences a threat to their self-worth. There are two responses to this.

The first path is turning toward others. Whoever doubts their own competence moves the proof of their worth into another area: they listen more, ask questions, and prepare for the needs of the other person. The second path is self-sabotage, technically called self-handicapping. This means behavior that creates an excuse before the outcome is known: starting too late, preparing poorly, postponing tasks. If one then fails, it was the circumstances, not oneself.

An everyday analogy: a mountaineer who distrusts the weather checks the forecast and packs a second jacket. Another who distrusts the same weather sets off so late that they would have to turn back at the summit anyway. Both doubt. Only one turns the doubt into preparation.

What studies show about doubt and confidence

Tewfik (2022) tested her model in four studies with a total of 3,603 participants: employees of an investment advisory firm, physicians in training, and two cross-industry groups, using surveys, video recordings, and a preregistered experiment. Those who had impostor thoughts more often were rated by supervisors or patients as more interpersonally effective. The reason was their stronger orientation toward others. The author found no disadvantage in performance or selection. At the same time, the widespread concern was confirmed: the thoughts encouraged self-sabotage. In the studies, however, this did not harm the way others rated them.

On the other side stands excessive confidence. The article cognitive biases of business owners describes a survey of 2,994 founders, of whom 81 percent rated their chance of success at seven out of ten or better and 33 percent at ten out of ten (Cooper, Woo, and Dunkelberg 1988). Hmieleski and Baron (2009) found a negative association between founders' optimism and growth in young companies. A measure of doubt is thus not a deficiency but a counterweight.

That doubt can also arise from self-presentation is shown by a small study by Hajji (2024) with 20 interviews and a survey of 50 founders in West Africa. The attitude of faking success until it arrives helped at first to gain credibility and support. Later it led to stress and to founders experiencing even real successes as undeserved. Whoever presents themselves as bigger than they are creates the very gap that then torments them.

When failure feeds doubt

Doubts arise not only from character but also from experience. Hossain and Valliere (2024) surveyed 423 entrepreneurs in North America. An experienced failure weakened the belief in being able to master entrepreneurial tasks. Passion for the cause and resilience offset this effect, in some cases more than fully. The study is a one-time survey and cannot establish causes, but it fits what many experience after losing a major order or going through a difficult phase.

For owners this is an important pointer. Doubt after a setback is a normal reaction and not evidence of a lack of aptitude. How to learn from a setback without turning it into a judgment about oneself is described in the article learning from bad decisions: not every bad outcome is a bad decision, and whoever looks only at the outcome learns the wrong thing.

A doubt that becomes a question is preparation. A doubt that remains a judgment is a burden.

Two readings: doubt as a warning system or as a brake

The first reading sees doubt as a warning system. Whoever doubts themselves checks more carefully, gets a second opinion, listens better to customers, and falls less often into the overconfidence for which many founders pay dearly. In favor of this reading are Tewfik's findings on turning toward others and the studies on overconfidence.

The second reading sees doubt as a brake. Whoever doubts themselves decides too late, prices too cheaply, does not dare approach large customers, and sabotages themselves to have an excuse. In favor of this reading are the second path in Tewfik's model and the findings on failure and weakened self-efficacy. How costly procrastination can be is described in the article the courage to decide.

I consider both readings correct, because they describe different forms of doubt. Doubt protects when it is directed at a matter that can be checked: is our capacity sufficient for this order? Do I know this customer's requirements well enough? It paralyzes when it is directed at the person and knows no result that could refute it: am I even a real entrepreneur? The first form leads to an action, the second to a loop.

The Doubt Check: three questions for every doubt

From this distinction, a short check can be derived that I call the Doubt Check. It takes a few minutes and works best in writing.

1. Write down the doubt

   Write the doubt down in one sentence, just as it sounds in your head, for example: I cannot run a project this big.

2. Translate it into a factual question

   Ask which checkable point lies behind it: do we have the people, the experience, and the liquidity for a project of this size? If no factual question can be found, the doubt is a judgment about the person.

3. Set the check

   Decide who answers the factual question by when: a cost calculation, a conversation with an experienced colleague, a look at comparable orders.

4. Choose how to handle the judgment

   If a judgment about your own person remains, say it out loud, with a mentor, an advisory board, or a person you trust. Judgments that are spoken out often lose their weight.

Whoever applies the check for a few weeks sees a pattern. The worked example shows how the doubts of one month might be distributed.

What holds in general and where it stops

For running a business, the distinction has a consequence. An owner who treats doubts as factual questions also makes it easier for employees to voice concerns. Whoever hides doubts, by contrast, sets a standard by which uncertainty is a weakness. Then owners hear about problems only when they can no longer be overlooked. A counterpart who does not depend on the owner also helps. The article mentoring for business owners describes that a mentor also fulfills a psychological function.

The limits of this essay belong here as well. Tewfik's studies concern employees and physicians, not entrepreneurs. The West African study is small, the North American one a one-time survey. Self-doubt and anxiety can also be signs of exhaustion or a mental illness. If they persist for weeks and rob you of sleep and drive, the next step leads to a doctor. The article owner health describes the warning signs.

Conclusion: when does self-doubt protect, and when does it paralyze?

The guiding question was when self-doubt protects an entrepreneur and when it paralyzes them. Research shows two paths. Doubt can direct attention toward others and act as a counterweight to widespread overconfidence. But it can also lead to self-sabotage that creates an excuse before the outcome is known. Which path is taken depends above all on whether the doubt is directed at a checkable matter or at one's own person.

What follows is not advice to get rid of doubt, but to translate it. For this week, it is enough to write down the next doubt and check whether a factual question can be made of it.

Whoever never doubts checks nothing. Whoever only doubts decides nothing. The difference lies in what one does with the doubt.