Author: Taylor Warfield, Former Bain Manager and interviewer

Last Updated: March 20, 2026

Case interview types fall into 14 major categories, with profitability, market entry, and growth strategy cases being the most common at McKinsey, BCG, and Bain. Understanding each type gives you a significant edge because roughly 90% of all consulting cases map to one of these patterns.

 

In this guide, I cover all 14 types of consulting cases you need to know, including the frameworks to solve each one and how common each type is. I also break down the different case interview formats (interviewer-led, candidate-led, written, and group) so you walk into every interview fully prepared.

 

But first, a quick heads up:

 

McKinsey, BCG, Bain, and other top firms accept less than 1% of applicants every year. If you want to triple your chances of landing interviews and 8x your chances of passing them, watch my free 40-minute training.

 

What Are the Most Common Case Interview Types?

 

There are 14 common case interview types. Based on data from hundreds of recent MBB interviews, profitability cases make up roughly 30% of all cases, making them the single most common type. Market entry and growth strategy cases are the second and third most common.

 

The table below summarizes all 14 case interview types, what each one tests, and how frequently each appears in consulting interviews.

 

Case Type	What It Tests	Frequency	Key Framework
Profitability	Diagnosing profit declines via revenue and cost analysis	Very High	Revenue vs. Cost tree
Market Entry	Evaluating whether to enter a new market or geography	High	Market, Competition, Capabilities, Financials
Growth Strategy	Identifying paths to revenue or market share growth	High	Organic vs. Inorganic growth levers
M&A	Assessing acquisition fit, synergies, and valuation	High	Strategic fit + Synergies + Valuation
Pricing	Setting optimal price for a product or service	Medium	Cost-based, Competition-based, Value-based
Market Sizing	Estimating the size of a market or quantity	Medium	Top-down or Bottom-up approach
Operations	Improving efficiency in supply chain or processes	Medium	Process breakdown + Bottleneck analysis
New Product	Evaluating a product launch strategy	Medium	Market + Product fit + Go-to-market
Competitive Response	Responding to a competitor threat or market shift	Medium	Threat assessment + Response options
Cost Optimization	Reducing costs without hurting performance	Medium	Fixed vs. Variable cost analysis
Revenue Growth	Increasing revenue through pricing, volume, or mix	Low-Med	Revenue driver tree
Valuation	Determining the value of a company or asset	Low-Med	DCF, Comparable company, or Multiples
Marketing	Developing marketing or go-to-market strategy	Low	4 P's (Product, Price, Place, Promotion)
Public Sector	Solving government or nonprofit challenges	Low	Stakeholder analysis + Impact metrics

 

In my experience interviewing candidates at Bain, most cases blend two or more types. A market entry case might include a market sizing component and a profitability analysis. The types above represent the primary framing of the case, not rigid categories.

 

What Are the 14 Types of Consulting Cases?

 

Below is a detailed breakdown of each case interview type, including what it is, how to approach it, example questions, and practical tips from my years as a Bain interviewer.

 

What Are Profitability Cases?

 

Profitability case interviews are the most common type, making up an estimated 25% to 30% of all consulting cases. Your job is to figure out why a company's profits are declining and recommend a fix.

 

How to approach it: Start by breaking profit into its two components: revenue and costs. On the revenue side, check whether quantity sold or price has dropped, and dig into which product lines, geographies, or customer segments are affected. On the cost side, separate fixed costs from variable costs and identify which specific line items have increased.

 

Once you have found the quantitative driver, ask qualitative questions about customers, competitors, and market trends to understand why the change happened. Then brainstorm solutions.

 

Example: "A national restaurant chain has seen profits drop 20% over the past year despite stable revenue. What would you investigate?"

 

Tip: Always benchmark against competitors early. If the entire industry is experiencing the same decline, the root cause is likely external (regulation, input costs, demand shift). If only your client is struggling, the problem is company-specific.

 

What Are Market Entry Cases?

 

Market entry case interviews ask whether a company should enter a new market, whether that means a new geography, customer segment, or product category. These are the second most common case type at MBB firms.

 

How to approach it: Evaluate four areas in order. First, is the market attractive (size, growth rate, margins)? Second, is competition manageable (concentration, barriers to entry, differentiation)? Third, does the company have the capabilities to succeed (or can it acquire them)? Fourth, will the financials work (expected revenue, costs, timeline to profitability)?

 

Example: "A European athletic apparel brand is considering entering the U.S. market. Should they?"

 

Tip: Don't just analyze whether the market is attractive in isolation. Pay close attention to whether the company's specific product offering actually fits the needs of the new market. A great market with poor product-market fit is still a bad entry decision.

 

What Are Growth Strategy Cases?

 

Growth strategy case interviews ask you to identify how a company can grow. Growth could come from organic levers (new products, new markets, increased sales) or inorganic levers (acquisitions, partnerships, joint ventures).

 

How to approach it: First, understand the client's current position and growth goal (revenue target, market share target, timeline). Then evaluate organic options: can they sell more to existing customers, acquire new customers, launch new products, or expand geographically? Next, evaluate inorganic options: are there acquisition targets, partnership opportunities, or licensing deals? Prioritize by impact, feasibility, and risk.

 

Example: "A mid-sized SaaS company wants to double revenue in three years. What growth strategies would you recommend?"

 

Tip: Quantify each growth lever whenever possible. Instead of saying "they could acquire new customers," estimate how many new customers are realistically obtainable and what revenue that represents. This turns a vague recommendation into a concrete one.

 

What Are Merger and Acquisition Cases?

 

Merger and acquisition case interviews ask you to evaluate whether a company should acquire or merge with another company. According to interview data from recent recruiting cycles, M&A cases appear in roughly 10% to 15% of MBB interviews.

 

How to approach it: Assess four areas. First, is the target's market attractive? Second, is the target company itself attractive (financials, market position, capabilities)? Third, what synergies does the deal create? Look at both revenue synergies (cross-selling, new customers, new channels) and cost synergies (eliminating redundancies, economies of scale). Fourth, is the price reasonable given projected returns?

 

Example: "A large consumer goods company is considering acquiring a direct-to-consumer startup for $500M. Should they proceed?"

 

Tip: Synergies are the heart of every M&A case. If you cannot clearly articulate revenue synergies, cost synergies, or both, the acquisition is hard to justify regardless of how attractive the target looks on paper.

 

What Are Pricing Cases?

 

Pricing case interviews test your ability to set the right price for a product or service. There are three primary pricing strategies, and most real answers blend all three.

 

How to approach it: Consider three pricing lenses. Cost-based pricing starts with total production cost and adds a margin. Competition-based pricing looks at what competitors charge for similar products. Value-based pricing quantifies the benefit the customer receives and prices based on that value. Your final price typically sits between the cost floor and the value ceiling, adjusted for competitive positioning.

 

Example: "Your client has developed a new medical device that reduces surgery time by 30%. How should they price it?"

 

Tip: For value-based pricing, always quantify the dollar value to the customer. If the device saves 30% of surgery time and the average surgery costs $50,000, the device saves roughly $15,000 per procedure. That gives you a concrete anchor for the price conversation.

 

What Are Market Sizing Cases?

 

Market sizing case interviews ask you to estimate the size of a market or a specific quantity. These are especially common in first-round interviews and at the undergraduate level. They also appear as components within larger cases.

 

How to approach it: Choose either a top-down approach (start with a large number like the total population and narrow down) or a bottom-up approach (start with a single unit and scale up). Lay out your full approach before doing any math. Use round numbers to keep calculations clean. After reaching your answer, sanity check it against a known benchmark.

 

Example: "Estimate the annual revenue of the ride-sharing market in the United States."

 

Tip: Segment your population to improve accuracy. Instead of assuming all Americans use ride-sharing equally, break the population into urban vs. suburban vs. rural, or by age group. Each segment will have different usage rates, and this segmentation demonstrates structured thinking.

 

If you want to sharpen your case interview skills across all of these types, my case interview course walks you through proven frameworks for each one in as little as 7 days.

 

What Are Operations Cases?

 

Operations case interviews focus on improving the efficiency of a company's processes, whether in supply chain, manufacturing, logistics, or service delivery.

 

How to approach it: Map out the end-to-end process step by step. Identify where bottlenecks, delays, or quality issues occur. For each problem area, quantify the impact (cost, time, error rate) and brainstorm solutions. Prioritize solutions by impact and feasibility.

 

Example: "A logistics company's delivery times have increased 40% over the past six months. What is causing this and how would you fix it?"

 

Tip: When you break a process into steps, you create a natural framework for the case. The interviewer will see that you can systematically work through operational problems rather than jumping to conclusions.

 

What Are New Product Cases?

 

New product case interviews ask whether a company should launch a new product or service. These share similarities with market entry cases but focus more heavily on product-market fit and go-to-market strategy.

 

How to approach it: Evaluate four things. Does the product target an attractive market segment? Does it meet a real customer need better than existing alternatives? Does the company have the capabilities to develop and launch it? Will the product be profitable given expected pricing, volume, and costs?

 

Example: "A consumer electronics company is considering launching a smart home speaker. Should they proceed?"

 

Tip: Always address the competitive response. If the product succeeds, how will competitors react? Will they lower prices, launch a similar product, or bundle competing features? Factor this into your profitability estimate.

 

What Are Competitive Response Cases?

 

Competitive response cases ask how a company should react to a new competitor, a competitor's price cut, a disruptive technology, or a shift in market dynamics. These are increasingly common as industries face faster disruption cycles.

 

How to approach it: First, assess the threat: how significant is the competitive move and what is its likely impact on your client's market share and profits? Second, analyze your client's strengths and weaknesses relative to the competitor. Third, develop response options (match the competitor, differentiate, invest in innovation, acquire the competitor, or do nothing). Fourth, evaluate each option on feasibility, cost, and expected outcome.

 

Example: "A major airline's low-cost competitor has announced it will begin offering business-class service on key routes. How should your client respond?"

 

Tip: "Do nothing" is always a valid option worth analyzing. Sometimes the competitive threat is less serious than it appears, and overreacting can be more expensive than the threat itself.

 

What Are Cost Optimization Cases?

 

Cost optimization cases focus specifically on reducing a company's costs without damaging quality or growth. While profitability cases cover both revenue and cost, cost optimization cases zoom in entirely on the cost side.

 

How to approach it: Break costs into fixed and variable. Within each category, identify the largest cost drivers and benchmark them against industry averages. Look for redundancies, inefficiencies, and opportunities to renegotiate contracts or consolidate operations. Prioritize cost reduction opportunities by magnitude and ease of implementation.

 

Example: "A hospital system needs to reduce operating costs by 15% without compromising patient care. Where would you look?"

 

Tip: Procurement is often the fastest win in cost optimization cases. Companies frequently overpay for supplies, services, or raw materials simply because contracts haven't been renegotiated in years. According to industry benchmarks, strategic sourcing can reduce procurement costs by 10% to 25%.

 

What Are Revenue Growth Cases?

 

Revenue growth cases are a subset of profitability and growth strategy cases that focus specifically on increasing the top line. The interviewer wants to see how you decompose revenue into its drivers and identify actionable levers.

 

How to approach it: Break revenue into its components: number of customers multiplied by transactions per customer multiplied by average transaction value. Alternatively, use price multiplied by quantity. Identify which lever has the most upside. Explore strategies for each: acquiring new customers, increasing purchase frequency, upselling to higher-value products, or raising prices.

 

Example: "An online subscription service has plateaued at 2 million subscribers. How can they grow revenue by 25%?"

 

Tip: Revenue growth cases often have a pricing component hidden inside them. Before exploring costly customer acquisition strategies, check whether there is room to increase prices without significantly reducing volume. A 5% price increase with no volume loss drops straight to the bottom line.

 

What Are Valuation Cases?

 

Valuation case interviews ask you to determine the value of a company or business unit. These are more common in private equity focused interviews but also appear in standard consulting interviews, especially during M&A cases.

 

How to approach it: Three main valuation methods exist. Discounted cash flow (DCF) projects future cash flows and discounts them to present value. Comparable company analysis looks at valuation multiples (like EV/EBITDA) of similar public companies. Precedent transactions examine what acquirers have paid for similar companies. In a case interview, you will typically use one or two of these methods.

 

Example: "A private equity firm is evaluating a specialty retailer that generates $20M in annual EBITDA. What is the company worth?"

 

Tip: You rarely need to build a full DCF model in a case interview. More often, the interviewer wants to see that you understand the concept and can apply a simple multiple. If comparable companies trade at 8x EBITDA, a quick estimate is $160M. Then discuss what might make this company worth more or less than the average.

 

What Are Marketing Cases?

 

Marketing case interviews focus on developing strategies to promote, position, or sell a product or service. These test your understanding of customer segmentation, positioning, and the marketing mix.

 

How to approach it: Use the 4 P's framework as your starting structure: Product (what are we selling and to whom?), Price (what should we charge?), Place (where and how will we sell it?), and Promotion (how will we reach customers?). Tailor each P to the specific customer segment the client is targeting.

 

Example: "A direct-to-consumer skincare brand wants to increase sales by 50% in 12 months. What marketing strategy would you recommend?"

 

Tip: Start with the customer, not the product. Understanding who the target customer is, what they care about, and where they consume information will make your marketing strategy recommendations far more specific and actionable.

 

What Are Public Sector Cases?

 

Public sector case interviews involve government agencies, nonprofits, or NGOs. The objective is usually maximizing social impact or operational efficiency rather than profit. McKinsey's public sector practice, for example, is one of the firm's largest.

 

How to approach it: Identify the key stakeholders (government officials, citizens, partner organizations) and their objectives. Define success metrics since profitability typically is not the primary goal. Evaluate the current situation, identify root causes of the problem, and propose solutions that are feasible given budget constraints and political realities.

 

Example: "A city government wants to reduce homelessness by 30% within two years. What approach would you recommend?"

 

Tip: In public sector cases, implementation feasibility matters more than in private sector cases. A brilliant solution that requires new legislation or massive budget increases is not practical. Focus on what can actually be done within existing constraints.

 

What Are the Different Case Interview Formats?

 

Beyond the types of business problems covered above, case interviews also differ in format. The format determines how you interact with the interviewer and present your work.

 

What Is the Difference Between Interviewer-Led and Candidate-Led Cases?

 

The two main styles of traditional case interviews are interviewer-led and candidate-led cases. The difference is about who controls the direction of the conversation.

 

	Interviewer-Led	Candidate-Led
Used By	McKinsey (primarily)	BCG, Bain, Deloitte, and most other firms
Who Leads	Interviewer controls pace and direction	Candidate drives the case forward
Structure	Pre-set questions in a specific order	Open-ended; you choose what to explore
Key Skill Tested	Responding to directed questions under pressure	Structuring and navigating problems independently
Your Focus	Answer each question thoroughly, then transition	Propose areas to explore and lead the conversation

 

In practice, many interviews blend both styles. A Bain partner might run a mostly candidate-led case but interject with specific questions. A McKinsey interviewer might give you more freedom in the final round. Prepare for both.

 

What Are Written Case Interviews?

 

Written case interviews give you a packet of data (charts, financial statements, market research) and ask you to analyze it and present a written recommendation. You typically get 60 to 90 minutes. These are used by BCG, Deloitte, and some McKinsey offices.

 

Start your written presentation with your recommendation, not with background analysis. Each slide should make one clear point. Use data from the packet to support every claim. End with concrete next steps.

 

What Are Group Case Interviews?

 

Group case interviews put multiple candidates together to solve a case as a team while interviewers observe. These test collaboration, communication, and leadership in addition to problem-solving.

 

Treat other candidates as teammates, not competitors. The best strategy is to make meaningful contributions, build on others' ideas, and help the group stay structured. Speaking too much or too little will both hurt you. Aim to add value every time you speak.

 

How Do First Round and Final Round Cases Differ?

 

At McKinsey, BCG, and Bain, you will go through two rounds of interviews. First-round cases are typically given by Associates or Engagement Managers with 2 to 5 years of experience. Final-round cases are given by Partners with 10 or more years of experience.

 

Final-round cases tend to be more ambiguous, more conversational, and more focused on business judgment than technical execution. Partners are also more likely to push back on your recommendations and test how you handle pressure. Your final-round performance carries more weight in the offer decision since Partners have more influence in the hiring committee.

 

Which Case Interview Types Are Most Common at McKinsey, BCG, and Bain?

 

While all three MBB firms test the same core skills, each firm has slight tendencies in the types of cases they favor. Based on candidate reports and my experience working with hundreds of candidates, here is a general breakdown.

 

Case Type	McKinsey	BCG	Bain
Profitability	Common	Very Common	Very Common
Market Entry	Common	Common	Very Common
Growth Strategy	Common	Very Common	Common
M&A	Less Common	Common	Common
Pricing	Common	Common	Less Common
Market Sizing	Very Common (within cases)	Common (standalone)	Common (within cases)
Operations	Common	Less Common	Common
Public Sector	Common	Less Common	Less Common

 

McKinsey interviews are interviewer-led, so market sizing and quantitative analysis tend to appear as specific questions within a larger case. At BCG and Bain, where cases are candidate-led, you may get a standalone market sizing or profitability case. McKinsey also has a larger public sector practice, which means public sector cases appear more frequently there.

 

Regardless of firm, profitability and market entry are the types you should spend the most time preparing for. If you can solve these two types confidently, you can handle most cases that come your way.

 

How Should You Prepare for Different Types of Case Interviews?

 

Preparing for case interviews is not about memorizing frameworks for each type. It is about building flexible problem-solving skills that you can apply to any business situation. Here is a practical preparation approach based on having coached hundreds of successful candidates.

 

Step 1: Learn the core frameworks. Understand the profitability tree, the market entry framework, and the basic case interview frameworks. These are building blocks, not scripts. You will adapt them to each case.

 

Step 2: Practice 3 to 5 cases solo. Work through a few cases by yourself to get comfortable with the structure and format before practicing with a partner.

 

Step 3: Do 10 to 15 cases with a partner. Partner practice is the single most effective way to improve. Focus on a mix of profitability, market entry, and growth strategy cases since those are the most common. Spend 15 to 20 minutes on feedback after each case.

 

Step 4: Practice with an experienced interviewer. After building a baseline, get feedback from someone who has actually conducted consulting interviews. They will catch blind spots that peers miss. My interview coaching sessions are designed to do exactly this.

 

Step 5: Target your weak areas. Track which case types give you the most trouble and drill those specifically. If math is your weakness, practice market sizing cases. If structuring is weak, practice open-ended growth strategy cases.

 

Most successful candidates complete 20 to 30 practice cases total over 4 to 8 weeks of preparation. Quality matters more than quantity. Five well-practiced cases with thorough feedback will improve your skills more than 20 cases rushed through without reflection.

 

Frequently Asked Questions

 

How many types of case interviews are there?

 

There are 14 widely recognized types of consulting case interviews: profitability, market entry, growth strategy, M&A, pricing, market sizing, operations, new product, competitive response, cost optimization, revenue growth, valuation, marketing, and public sector cases. Most real interview cases blend two or more types.

 

What is the most common type of case interview?

 

Profitability cases are the most common, making up roughly 25% to 30% of all consulting interview cases based on candidate survey data. Market entry and growth strategy cases are the second and third most common types. Together, these three types account for more than half of all cases asked at McKinsey, BCG, and Bain.

 

Do McKinsey, BCG, and Bain use the same case types?

 

All three firms use the same general case types, but the format differs. McKinsey primarily uses interviewer-led cases where the interviewer guides you through specific questions. BCG and Bain use candidate-led cases where you drive the problem-solving process. McKinsey also asks more public sector cases due to their larger government practice.

 

Can a single case interview combine multiple types?

 

Yes, and this is very common. A market entry case might start with a market sizing question, transition into a competitive analysis, and end with a profitability calculation. In my experience, the majority of MBB cases involve elements from at least two types. This is why building flexible frameworks matters more than memorizing type-specific ones.

 

Are brain teasers still asked in consulting interviews?

 

Pure brain teasers (riddles, logic puzzles) have become rare at top consulting firms. McKinsey, BCG, and Bain have moved away from them in favor of business cases that better simulate actual consulting work. You may occasionally encounter estimation questions that feel like brain teasers, but these are really market sizing problems that test structured thinking rather than trick answers.

 

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