In a case interview, you’re given a scenario like “Our client is a coffee company experiencing declining profits. How would you help?” or “How would you evaluate acquiring this business?” You have to think through the problem, ask clarifying questions, and present a structured approach. 

Interviewers assess: 

• Analytical thinking: Can you break down a complex problem? 

• Business acumen: Do you understand how companies make money and compete? 

• Communication: Can you explain your reasoning clearly? 

• Quantitative skills: Can you do math and think through numbers? 

• Creativity: Can you generate multiple approaches, not just one? 

• Humility: Do you know when it’s appropriate to ask for help? 

The interviewer isn’t necessarily looking for the “right” answer; they want to see how you think. 

Before you jump in, ask what kind of clarifying questions the interviewers allow. Then, ask questions that can help you make better educated guesses. Avoid generic questions like “what is the company’s business model,” because you should know this from research before the interview. Instead, ask things like, “Are there constraints I should know about (budget, market, regulatory)?” 

Don’t start solving randomly. Outline your approach: 

• “I’d look at this three ways: the market opportunity, competitive positioning, and operational efficiency. Let me start with the market.” 

• Consider using a framework. Common frameworks include: profitability issues broken into revenue decline vs. cost increase; M&A deals broken into strategic fit, valuation, and integration 

As you work through your structure, ask for data: 

• “Can you tell me what the market size is?” 

• “What are the company’s current profit margins?” 

• “How long has this problem been happening?” 

The interviewer will give you numbers or tell you to estimate. If you estimate, say that explicitly and state your assumptions clearly. 

If numbers come up, work through them clearly. You can ask for a pen and paper. Walk the interviewer through your calculations as you do them so they see your logic. 

Don’t present all your findings in isolation. Pull them together: 

• “Based on the market data, competitive landscape, and financial analysis, I’d recommend [action] because [reasoning]. This would address [specific problem] and position them to [desired outcome].” 

After your main recommendation, show you’ve thought through trade-offs: 

• “Another option would be to focus on cost reduction instead, but that would limit growth.” 

This demonstrates that you understand there’s rarely one perfect answer. 

“How many greeting cards does Hallmark sell on Mother’s Day?” These test your ability to break down a large number into smaller, estimable pieces. State your assumptions aloud and work logically. 

“Our client’s competitor just entered the market with a similar product. How do we respond?” These ask you to think like a strategist. Consider pricing, product differentiation, marketing, and customer loyalty. 

“Walk me through how you’d value a company you’re thinking of acquiring.” These test your financial modeling and business understanding. Know key concepts like EBITDA, discounted cash flows, and multiples. 

“We want to reduce costs by 20%. Where would you look?” Break down the business into its cost components and discuss where cuts are realistic without damaging the business. 

• How companies make money (revenue model, customer acquisition, profitability) 

• How to read financial statements (income statement, balance sheet, cash flow) 

• Key metrics (EBITDA, margins, return on investment, payback period) 

• How to value companies (multiples, DCF, precedent transactions) 

• Common business frameworks (Porter’s Five Forces for competitive analysis, SWOT, value chain) 

If these terms are unfamiliar, spend time learning the ones relevant to your field. 

Resources for case practice: 

• Bain & Company – Offer official case interview guides and sample cases 

• PrepLounge – Case interview community where candidates practice together 

• YouTube – Search “case interview walkthrough” to see how experienced consultants approach problems 

Practice should be frequent. Work through several practice cases before your actual interviews so you develop speed and confidence. 

As you practice, track cases you’ve done and your approach. Note: 

• What framework worked well? 

• Where did you get stuck? 

• What assumptions did you make? 

• What would you do differently? 

This helps you improve faster. 

• Think out loud. Silence is awkward and makes it hard for the interviewer to understand your reasoning 

• Ask for what you need. If you need to clarify the problem, ask 

• Don’t bluff. If you don’t know something, say so. Take a minute to think through it and explain what you would need to know to give the answer 

• Listen carefully. The interviewer may give you hints or steer you in a direction. Pay attention 

• Focus on process, not the answer. Interviewers care about your thinking more than whether you arrived at the “right” number 

• Manage your time. Cases usually have time limits. Pace yourself so you can present a recommendation, not just analysis 

If you want comprehensive case interview preparation: 

• Case in Point: Complete Case Interview Preparation by Marc P. Cosentino (2013) 

• Ace Your Case II!: Consulting Interview (Insider Guides Series) by WetFeet (2011) 

• Case Interview Secrets by Victor Cheng (2012) – Written by a former McKinsey interviewer 

• Crack the Case System: Complete Case Interview Prep by David Ohrvall (2011)