During a BCG interview, the difference between two candidates of comparable levels rarely hinges on knowledge of frameworks. It lies in the ability to think aloud, ask the right questions at the right time, and structure a response under pressure. Succeeding in your BCG interview requires targeted preparation, far beyond just reviewing typical cases.
BCG Casey: the digital filter that replaces the written test
Before even meeting a consultant, most candidates go through BCG Casey, the firm’s evaluation chatbot. This format has replaced the old BCG Potential Test (a 45-minute multiple-choice questionnaire) in almost all offices.
The principle: you receive a case structured in 8 to 10 sequential questions to be addressed in 25 to 30 minutes. Each answer conditions the next one. At the end, you record a 60-second client recommendation on video. The success rate hovers around 30% of candidates.
Why does this format change the game? You cannot go back. Each answer is final. This tests your ability to move forward with partial information, just like in a mission. BCG also makes Casey available for free on its careers page for you to practice. Using this tool before taking the actual evaluation significantly reduces the element of surprise.
To deepen your preparation for this stage, you will find strategy tips on Plein Emploi that detail interview formats and suitable response methods.
Structuring a BCG case: what recruiters really evaluate
The classic trap is to apply a framework (profitability, market entry, M&A) without adapting it to the problem at hand. BCG consultants evaluating candidates spot this approach in seconds.
What they are looking for can be summarized in three points:
- Clarifying the problem before solving it. Reformulate the statement, ask two or three questions to frame the scope. A candidate who rushes into analysis without checking that they are addressing the right question loses points immediately.
- The ability to prioritize. When faced with a case with five possible levers, the recruiter wants to see that you choose two or three and justify that choice. Exhaustiveness is not a goal; relevance is.
- Comfort with real-time numerical data. You will be given a graph or a table during the interview. Identifying the useful data, performing a simple calculation, and drawing a conclusion, all in under two minutes, is part of the exercise.
A good reflex: after laying out your structure, state your initial hypothesis. For example: “My hypothesis is that the margin decline comes from the product mix; I will start by verifying this point.” This shows that you are reasoning like a consultant, not like a student reciting a plan.
BCG fit interview: mistakes that eliminate
The fit interview (or experience interview) accounts for about half of the final score. Many candidates underprepare for it, thinking that only the case matters.
Have you noticed that fit questions seem simple? “Tell me about a situation where you had to convince someone” or “Describe a professional failure.” The difficulty does not come from the question. It comes from the ability to respond in a structured manner in under two minutes.
Each fit response must follow a logical progression: brief context, personal action, measurable result. Three sentences for the context, not ten. The recruiter wants to understand your role, not the complete history of the project.
Two mistakes regularly eliminate otherwise strong candidates in cases:
- Using “we” systematically. The recruiter is looking for your individual contribution. Replace “we decided” with “I proposed, then the team validated.”
- Choosing examples without real stakes. A minor conflict resolved in an hour impresses no one. Select situations where the outcome was not guaranteed and where your intervention changed the trajectory.
- Not tailoring examples to the targeted position. If you are applying as a junior consultant, an example of leading a team of 50 people will seem artificial. Choose situations proportionate to your level of experience.
AI and data skills: the new BCG criterion
BCG is heavily investing in training its consultants in technical skills related to artificial intelligence. This shift is reflected in the recruitment process.
Cases incorporating data or AI issues are becoming increasingly common. It is not about knowing how to code, but understanding how a predictive model could help a client, what data would be needed, and what limitations exist.
Specifically, if a case is about optimizing a supply chain, the recruiter might ask you: “How would you use the available data to prioritize actions?” Responding “I would do a data analysis” is not enough. Specify what data, what method, and what deliverable you would produce.
This expectation is not limited to technical profiles. BCG seeks consultants who can engage with data teams and ask the right questions. Demonstrating this ease during the interview positions you differently from the majority of candidates who stick to traditional approaches.
Preparing for a BCG interview is no longer limited to mastering traditional strategy cases. Between the Casey filter, the increasing demands on fit, and the integration of data issues, the sought-after profile has changed. Prepare each format separately, practice on the official chatbot, and build a stock of five to six solid fit examples. The rest will play out on the day, in your ability to remain clear under pressure.