Case interviews are the gatekeepers of consulting careers in India. McKinsey, BCG, Bain, Deloitte, KPMG, EY-Parthenon, and A.T. Kearney all use them — and so do a growing number of product, strategy, and investment banking roles at Flipkart, Razorpay, Goldman Sachs, and Sequoia. The case interview is not an intelligence test. It is a structured problem-solving test — and structured problems can be prepared for.
What Is a Case Interview?
A case interview presents you with an ambiguous business problem and asks you to solve it out loud, in real time, with your interviewer. Unlike technical interviews, there is rarely a single correct answer. You are evaluated on how you think, not just what you conclude.
| Element | What It Tests |
|---|---|
| Framework application | Do you structure ambiguous problems logically? |
| Hypothesis-driven thinking | Do you know where to look before you look? |
| Quantitative comfort | Can you do mental math under pressure? |
| Communication | Do you explain your reasoning clearly? |
| Business intuition | Do you understand how companies actually work? |
| Poise under pressure | Do you panic when pushed back on? |
The 4 Types of Cases You’ll Face in India
| Case Type | Common in | Example Problem |
|---|---|---|
| Profitability | MBB, Deloitte, KPMG | “Our client’s profits have dropped 20% — diagnose and fix.” |
| Market Entry | BCG, EY-Parthenon | “Should we enter the Indian electric vehicle market?” |
| Growth Strategy | Startups, Strategy teams | “Our Indian FMCG client wants to double revenue in 3 years — how?” |
| M&A / Due Diligence | IB strategy, PE firms | “Should our client acquire this mid-size EdTech company?” |
| Cost Reduction | Operations consulting | “This manufacturer’s costs are 15% above industry — what do we fix?” |
The Case Interview Framework Library
You do not need to memorise every framework. You need to know 3–4 deeply and apply them flexibly.
Framework 1: Profitability Tree
Revenue Problem? Cost Problem?
| |
Volume × Price Fixed vs Variable
| |
By Product / Region By Cost Category
| |
vs Market / vs Trend Benchmarked vs Competitors
When to use: Any case where profits are declining or below expectations.
Framework 2: Market Entry
1. Market Attractiveness
→ Market size (TAM) and growth rate
→ Competitive intensity (Porter’s 5 Forces)
→ Regulatory environment (critical for India — FSSAI, RBI, SEBI)
2. Company Readiness
→ Capabilities and assets
→ Financial strength
→ Strategic fit
3. Mode of Entry
→ Build (organic), Buy (acquisition), Partner (JV/franchise)
4. Risk Assessment
→ Downside scenarios and mitigation
Framework 3: Growth Strategy (4 Cs)
Customer → Who are we targeting? Are we penetrating deeply enough?
Competition → What are rivals doing? What’s our differentiation?
Company → What capabilities do we have? What’s limiting us?
Context → Macro trends — India’s digital economy, consumer behaviour, regulation
Framework 4: Issue Tree (for any open-ended case)
Break the problem into mutually exclusive, collectively exhaustive (MECE) buckets. Nothing overlaps. Nothing is missed.
Example — “Why are we losing market share in India?”
Internal Factors External Factors
├── Product quality ├── Competitor moves
├── Pricing ├── Customer preference shifts
├── Distribution gaps ├── Regulatory changes
└── Brand perception └── Macroeconomic factors
The 6-Step Case Interview Process
Step 1: Clarify (2 minutes)
Ask 2–3 targeted questions before structuring. Never jump straight into frameworks.
> “Before I structure this — could you help me understand the client’s definition of profit here? Is it operating profit or net profit?” / “What time period are we focused on?”
Step 2: Structure (2 minutes)
Lay out your framework explicitly. Say it before writing it.
> “I’d like to approach this through the profitability tree — breaking into revenue and cost drivers, then drilling into the most promising branch. Does that sound like a useful approach?”
Step 3: Prioritise
Tell the interviewer which branch you’re going down first — and why.
> “Revenue is flat while costs are rising — so I’d like to start on the cost side. Specifically, I’ll look at whether this is fixed or variable costs and which categories have changed.”
Step 4: Analyse
Ask for data. Do the math. Show your working.
> “Could I have the revenue breakdown by product line for the last 3 years?” → [receives data] → “Interesting — Product A grew 12% but Product B declined 18%. The blended decline suggests Product B is dragging overall revenue. Let me quantify the impact…”
Step 5: Synthesise
After each section, synthesise before moving on.
> “So the main driver seems to be a 23% drop in Product B revenue, primarily from India’s Tier-2 cities. That suggests a distribution or pricing issue rather than a product quality issue. I’d like to explore distribution next.”
Step 6: Recommend
Close with a clear, structured recommendation.
> “Based on my analysis, I recommend [specific action] because [2 reasons]. The main risk is [risk], which we’d mitigate by [mitigation]. The next steps are [3 concrete actions].”
Mental Math for Case Interviews
Indian consulting interviews frequently require fast, clean arithmetic. Practice these:
| Calculation Type | Example | Shortcut |
|---|---|---|
| Market size (bottom-up) | India EV market | Population × penetration rate × avg. purchase |
| % change | Revenue fell from ₹120Cr to ₹96Cr | (120-96)/120 × 100 = 20% drop |
| CAGR | ₹100Cr to ₹200Cr in 5 years | Rule of 72: 72/5 = ~14% |
| Profit margin | Revenue ₹500Cr, profit ₹75Cr | 75/500 = 15% |
| Break-even | Fixed cost ₹10Cr, margin ₹20/unit | 10Cr/20 = 50L units |
Practice tip: Do 10 mental math problems daily using India-scale numbers (₹Crores, lakh users) so you’re calibrated.
India-Specific Case Context
Many India cases require knowledge of the local market. Know these:
| Domain | Key India Facts |
|---|---|
| Consumer | 140Cr population; 70% rural; middle class = ~40Cr |
| Digital | 85Cr internet users; UPI processes $1.5T annually |
| Retail | Organised retail only 12% of ₹80L Cr market |
| Pharma | India = pharmacy of the world; generic exports = $25Bn |
| EV | India targets 30% EV by 2030; FAME II subsidy scheme |
| FinTech | BNPL, neo-banking growing 40%+ annually |
Case Interview Prep Roadmap
Week 1–2: Foundation
☐ Read Case in Point (Marc Cosentino) or Victor Cheng’s LOMS
☐ Practise profitability framework on 5 written cases
☐ Do 10 mental math problems daily
Week 3–4: Live Practice
☐ Pair with a case partner (IIM/ISB alumni groups, PrepLounge)
☐ Do 2–3 live cases per week
☐ Record yourself — watch back for filler words and pacing
Week 5–6: Company-Specific
☐ Research your target firm’s India focus areas
☐ Practise firm-specific case styles (McKinsey = interviewer-led, BCG = more structure)
☐ Mock interviews with consultants on Exponent or PrepLounge
References:
- Case in Point — Marc Cosentino (Burgee Press) — https://www.caseinterview.com/case_in_point
- McKinsey India — Consulting Careers — https://www.mckinsey.com/careers/india
- PrepLounge — Case Interview Practice — https://www.preplounge.com
- Victor Cheng — Look Over My Shoulder Programme — https://www.caseinterview.com/loms
- BCG India — Careers and Case Prep — https://www.bcg.com/careers/india