A profitability case is a case interview question type where you analyze why a company's profits have changed - typically declined - using the framework Profit = Revenue - Costs. Profitability cases are one of the most common case types in consulting interviews, appearing in 30-40% of cases. They test your ability to structure a business problem, analyze data, and recommend actionable solutions.
| Also known as | Profit decline case, margin case, P&L case |
| Frequency | 30-40% of case interviews |
| Core framework | Profit = Revenue - Costs |
| Key skills tested | Structuring, mental math, hypothesis testing, recommendations |
| Typical prompt | "Our client's profits have declined 20%. Why, and what should they do?" |
A profitability case presents a scenario where a company's profits have changed - usually declined - and asks you to diagnose the cause and recommend solutions. The analysis follows a structured breakdown of profit into its components.
The reason profitability cases are so common: every business cares about profits, and the analysis tests fundamental consulting skills. If you can diagnose a profit problem, you can tackle most business challenges.
Real consulting engagements often start as profitability problems. A CEO calls McKinsey saying "We used to make $100M profit, now we make $80M - help." The profitability case format mirrors this real-world situation.
Profit = Revenue - Costs
Revenue = Price × Volume
Costs = Fixed Costs + Variable Costs
The framework is MECE: Revenue and Costs don't overlap, and together they fully explain profit. This makes it a reliable starting point for any profitability problem.
Prompt:"Your client is a regional airline. Profits have dropped 30% year-over-year despite stable passenger numbers. Why, and what should they do?"
Diagnosis path:
Recommendations: (1) Hedge fuel costs for next year, (2) Optimize routes to reduce fuel consumption, (3) Consider fuel surcharge on tickets, (4) Evaluate fleet efficiency - older planes burn more fuel.
| Variation | Example Prompt |
|---|---|
| Profit decline | "Profits dropped 25%. Why?" |
| Margin compression | "Revenue is up but margins are shrinking." |
| Turnaround | "The company is losing money. How do we fix it?" |
| Cost reduction | "The CEO wants to cut costs by 15%." |
| Revenue growth | "How can we increase revenue by 20%?" |
A profitability case asks you to analyze why a company's profits changed. You use the framework Profit = Revenue - Costs, drill into each component to find the root cause, then recommend solutions.
Jumping to solutions before diagnosing the problem. Don't say "cut costs" until you've confirmed costs are the issue. Always diagnose (Revenue or Costs? Which specific item?) before recommending.
Make the framework automatic, practice mental math for percentage calculations, then do full profitability case practice with feedback to build pattern recognition.
Work through realistic profitability cases and get feedback on your structure and analysis.
Start PracticingLast updated: April 22, 2026