When preparing for a case interview, especially under time constraints, working with an experienced coach can significantly enhance your chances of success.
💡 Pro Tip: PrepLounge offers access to over 800 (former) management consultants from top firms like McKinsey, BCG, and Bain, who are ready to help you perfect your interview technique.
What Are the Key Advantages of Practicing With a Coach?
Personalized Feedback
One of the primary benefits of working with a case coach is receiving tailored feedback. Unlike general preparation methods, a coach can pinpoint your specific weaknesses and provide actionable advice to improve. This personalized approach ensures that your preparation is efficient and targeted, addressing your unique needs and challenges.
Realistic Simulation
Practicing with a coach allows you to experience a realistic interview setting. Coaches who have conducted numerous case interviews can replicate the pressure and dynamics of a real interview, helping you become more comfortable and confident. This experience is invaluable, as it prepares you to handle the stress and spontaneity of actual interviews.
Insider Knowledge
Experienced coaches often come from prestigious consulting backgrounds themselves. Their insider knowledge about what top firms are looking for can give you a significant edge. They can share insights about the interview process, common pitfalls, and the specific attributes that firms value, ensuring that you are well-prepared to meet these expectations.
Structured Approach
A coach can help you develop a structured approach to solving case problems. This structured thinking is crucial in case interviews, where clear, logical, and well-organized answers are highly valued. Coaches can teach you frameworks and methodologies that streamline your problem-solving process, making your responses more coherent and compelling.
Time Efficiency
For candidates with limited preparation time, coaching is a highly efficient way to get ready. Coaches can quickly identify areas that need improvement, helping you focus your efforts where they are most needed. This targeted preparation can save you time and help you progress faster than you would on your own.
Confidence Boost
Confidence plays a crucial role in interview performance. Regular practice with a coach can boost your confidence by familiarizing you with the interview format and helping you refine your answers. Knowing that you have prepared thoroughly with expert guidance can significantly reduce anxiety and improve your overall performance.
How PrepLounge Optimally Supports You With a Wide Range of Coaching Options
🚀 Flexibility and Convenience
PrepLounge offers a variety of coaching options to fit your needs and preferences. You can choose from individual sessions, CV reviews, or comprehensive coaching packages that include multiple sessions or focus on specific topics. Additionally, there are programs available that combine a premium membership with coaching credits, providing a cost-effective way to access top-notch coaching services.
📅 Workshops and Online Events
PrepLounge also regularly hosts workshops and online events led by experienced coaches. These sessions cover a range of topics and provide opportunities for interactive learning and direct feedback. Participating in these events can further enhance your preparation and keep you updated on the latest trends and techniques in case interviews.
How to Find the Perfect Coach to Suit Your Needs
To find the perfect coach for your case interview preparation, you can proceed in three steps within the coach overview:
Filtering: Begin by filtering the coaches based on your most important criteria, such as price per coaching session, or employer.
Selection: Choose up to 10 coaches whose profiles, ratings, Q&A contributions, and PrepLounge awards you wish to explore further.
Contacting: Reach out to 2-3 coaches to address any potential questions or concerns about their coaching approach. Feel free to ask if they offer a free intro call.
What Makes a Good Coach?
Good coaches are characterized by the following features:
Customization: they tailor the coaching to your specific needs.
Good rapport: They make you feel comfortable and work well with them.
Transparency: They offer you full transparency about the coaching process on PrepLounge.
Final Thoughts on Working With a Coach
Practicing with a coach is a strategic investment in your case interview preparation. The personalized feedback, realistic simulation, insider knowledge, and confidence boost that coaches provide can make a significant difference in your performance. With the expert guidance available on PrepLounge, you can ensure that you are thoroughly prepared and ready to excel in your case interviews.
By leveraging the expertise of experienced case coaches and taking advantage of the diverse coaching options and events available on PrepLounge, you can maximize your preparation efficiency, build your confidence, and increase your chances of securing a position at a top consulting firm.
How many cases do I need to reach offer level with a mix of coach and peer practice?
17 min
< 100
2
Best answer by
Franco
It really depends on your starting point and speed of learning, but in my experience it typically ranges from ~20 to 60 cases to reach offer level. On the quality vs quantity point; both matter. You won’t get there with just volume, but you also won’t get there with too little practice. For example, 10 cases with a strong coach can be more valuable than 60 with peers, but you still need enough repetitions to build consistency. What I usually recommend: Do at least one session with a professional coach at the very beginning to learn the basics and fix major mistakes early Then practice with peers Do another checkpoint session 2–3 weeks before interviews to identify remaining gaps and still have time to fix them On quality in practice, after each case you should: Identify 1–2 key mistakes (not 10 things) Understand why they happened Actively fix them in the next case That’s how you improve; not by just logging more cases, but by closing specific gaps one by one. Feel free to DM me if you want to go deeper. Best, Franco
From my experience, the difference is much smaller than people think. Apart from general local market awareness (useful for any business interview), the cases themselves do not differ much across regions. The core skills being tested are exactly the same. I recruited extensively in Singapore, especially on the INSEAD campus, and I was using the same cases as in Europe and the US. There’s no expectation for deep or niche regional knowledge. What helps is being comfortable with a few basics: population sizes / market scale key industries high-level business dynamics That’s enough. Focus on core casing skills, and just add a light layer of regional awareness. Best, Franco
Good question and honestly, this is exactly where a lot of candidates get stuck. A couple of thoughts based on what I typically coach during my mock interviews. 1. Standard vs. custom (top level) In a profitability case, I wouldn’t overcomplicate the first layer. “Revenues and costs” is perfectly fine and in most cases, actually preferred. Where candidates go wrong is trying to be clever too early. If you jump straight to something like “revenue per passenger,” you often lose clarity and, more importantly, risk missing parts of the problem. So as a rule of thumb: Keep the first layer clean and MECE Then bring the customization in the lower layers 2. How deep to go and how to avoid lists What I usually suggest in coaching is to think in three layers: First layer → very clean, MECE Second layer → where you add analytical structure Third layer → hypotheses / things you’d want to test (doesn’t need to be MECE) Applied to a profitability case: Layer 1: Revenues | Costs Layer 2 (example on revenues): Price × Volume × Mix And this is already where you start tailoring; e.g., “mix” could be product mix, customer segment, channel, geographies depending on the business. Layer 3 (example under volume): Here you move away from structure and into thinking: Has competition impacted volumes recently? Any shifts in customer demand? Any internal constraints (e.g., capacity, distribution)? Hope it helps, Feel free to DM me if you have further questions Franco
How to bounce back after not being selected for a role?
4 hrs
< 100
3
Best answer by
Komal
Hi, firstly congratulations on the feedback from the firm. It is unfortunate that they don't have enough positions available but you can take confidence from your performance and know that you are well-prepared to tackle other applications and interviews that you might have coming up. Give yourself a few days to rest and reset - as you said, the outcome is still fresh and hard to get around to. Then, assess what applications/interviews you would like to focus on while you continue to stay in touch with this firm. If you have any specific concerns on your mind, happy to discuss further.
It’s a thin ice to walk on.
On the one hand, if you answer “dissent” you risk of coming off as stubborn and arrogant, the person who is pushing her opinion no matter what.
On the other hand, if you answer “consensus” you risk of coming off as a softy, the person who agrees to everything, so that people don’t get upset.
So, if asked that question in an interview I would go with a typical consulting answer of “it depends” :)
If you disagree with smbd and think that if your opinion is not taken into account, then the client interests are not served the best or your values are compromised, then “dissent”.
But if you disagree with smbd and your idea is just as good as anybody else’s at the table and it’s important to bring all the stakeholders on board to move things forward, then “consensus”.
I hope this helps!
Best,
Daniel
CDD cases are different in one fundamental way: the answer has a deadline and money behind it. A PE client is about to write a 200M check. Your job isn't to recommend a strategy, it's to validate or kill their investment thesis, fast. What the case actually looks like: you'll get a target company and a basic thesis, something like "market leader in fragmented niche, room to consolidate." The case tests whether that holds under pressure. Expect to size the market, stress-test growth assumptions, and flag risks the buyer hasn't priced in. Where it differs from a standard strategy case: the frame is defensive, not generative. You're not building a plan, you're auditing one. Speed matters more than elegance. You're working in 4-6 week sprints, not 3-month projects. The output is an opinion with a number attached. "Is 12x EBITDA fair given X, Y, Z?" What interviewers are actually looking for: sharp commercial judgment over clean frameworks. They want to see you prioritize. What's the one assumption that kills this deal if it's wrong? Go there first. On prep: practice leading with a point of view, not a structure. "My hypothesis is the growth story is real but margin expansion is overstated, here's why" beats walking through a 5-box framework every time. Amsterdam specifically: small team, generalist across sectors. Being comfortable switching between industrials, healthcare, and tech without losing sharpness will matter. Good luck.
You should send thank-you notes to both interviewers- it's not just appropriate, it's a professional best practice that reinforces your interest and attention to to detail. In consulting interviews, especially at McKinsey, personalized follow-ups are noticed and appreciated as they demonstrate genuine engagement with the process. it has to be personalized How to personalize each note effectively: For the interviewer who called you: Reference their specific update about moving to R2 and any insights they shared about the next round or team dynamics For the other interviewer: Acknowledge their role in the interview process, mention appreciating the opportunity to meet them (even if briefly), and note something you learned about the firm from the overall experience please note that doing this wont give u extra points on the interview. scoring is already happened.
How competitive are MBB internships for undergraduates? How much is expected?
19 hrs
< 100
6
Best answer by
Franco
Hi Pablo, Don’t worry; a large portion of MBB consultants do not come from economics or business backgrounds. In fact, engineering and mathematics graduates are very well represented, so your profile definitely fits. For undergraduate internships, they only expect basic business knowledge, such as understanding concepts like EBITDA, variable vs. fixed costs, ROI, etc. You don’t need deep financial expertise beyond that. Regarding the recruiting process, I’ve personally interviewed many undergraduates, MBAs, and PhDs for both junior and senior roles. In most cases, I used the same types of cases across candidates. What changes is mainly the level of expectations; interviewers adjust how demanding they are in the analysis, communication, and depth of insights depending on the candidate’s experience. The core challenges, however, remain very similar. If you’d like more information, feel free to reach out. I have extensive experience with MBB recruiting and would be happy to help. Best, Franco
Hi there — a lot of candidates struggle with this, so you're definitely not alone. Math and information management are very common pain points in case interviews.1. What math concepts should you focus on? Case interview math is usually not complicated, but it requires being structured, calm, and communicative. The most useful concepts to master are: Core calculations (non-exhaustive) Percentages (e.g., 20% of 250, % growth/decline) Ratios and proportions Multiplication and division with round numbers Weighted averages Breakeven calculations Market sizing arithmetic Growth rates (rough YoY changes) Techniques to make math easier Round numbers strategically (e.g., 49 → 50) Break calculations into steps Example: 24 × 35 → (24 × 30) + (24 × 5) Say your approach before calculating “I'll first multiply revenue per unit by volume to get total revenue.” Communicating while calculating You don't need to do everything simultaneously. A simple structure works well: State the formula Plug in the numbers Calculate step by step Give the final answer with interpretation Example: “Profit equals revenue minus costs. Revenue is $50 per unit × 200 units, so that's $10,000. Costs are $6,000. That leaves us with a profit of $4,000.” Interviewers care more about clear thinking than speed.2. How to manage information and avoid forgetting things This is usually a note-taking structure problem, not a memory problem. A simple approach: Divide your page into sections Left side: Case objective Key question Middle: Structure/framework Right side: Numbers and data Bottom: Insights/conclusions Also: Circle key numbers Write units clearly ($M, %, units) When new data appears, quickly summarize it out loud (“So we have 3M customers and $20 average spend.”) This reduces the need to memorize because everything is visible on paper.3. Should you practice with peers? Yes, this is actually important to do. Practicing alone helps with understanding the flow, but case interviews are interactive. You need practice with: Explaining your math verbally Thinking under pressure Structuring out loud Handling interviewer questions Messing up during peer practice is exactly how you improve. In fact, candidates who only practice alone often struggle more in real interviews. Even if the math goes wrong, you’ll still learn: How to communicate your logic How to recover from mistakes How to slow down and structure calculationsOne extra tip for math mistakes Many candidates rush because they think speed is expected. In reality: Accuracy + clear communication > speed. It’s perfectly fine to say: “Let me take a few seconds to calculate this.” That small pause often prevents most mistakes. If you need help working through these challenges, feel free to reach out — happy to help with more specific coaching.
Questions about market size are frequently asked in case interviews in consulting because they require a blend of logic, mathematics, and common sense. They can be asked as standalone questions or as part of a larger case. Applicants who are familiar with market sizing questions can really perform here.
Market entry cases are one of the key issues in the consulting industry and present consultants and firms with unique challenges and opportunities. These cases require deep analysis and strategic planning to successfully enter new markets.
Brainteasers are a type of problem that focuses on a single issue rather than complex business cases. They require out-of-the-box thinking, logic or math skills and can take the form of riddles, word problems or visual puzzles. These tasks are designed to test your problem-solving skills, analytical thinking and ability to remain calm under pressure.Typical problems cover everyday life's topics and might even include unrealistic assumptions. All necessary information is usually included in the question so that further assumptions are not necessary. This article explains in more detail why brainteasers are useful in case interview preparation and how to solve them.