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Playing with profit levers pt. 2

Would love a faster way to solve the following question (my laborious steps are below):

PackageCo has revenue of $135M, profit of $27M and contribution margin of 60%. The new CEO wants to increase the profit margin to 30% by reducing marketing and sales expenses (part of fixed costs), which currently make up 15% of total costs. How much does the company need to reduce marketing and sales expenses (in %) in order to achieve the new profit margin?

  • Old profit margin = $27M / $135M = 20%
  • Change in PM = New PM - Old PM = 30% - 20% = 10% ==> Q: what can I do with this info?
  • Gross Profit = $135M * 60% = $81M
  • Total Costs = $135M - $27M = $108M
  • VC = $135M - $81M = $54M
  • M&S FC = $108M * 15% = $16.2M = ~$16M
  • Other FC = $38M
  • Target Profit = Revenue * 30% = $40.5M
  • New M&S = Gross Profit - (New Profit + Other FC) = $81M - $40.5M - $38M = $2.5M
  • % Change in M&S = ($2.5M - $16M) / $16M = ~ -$13M / $16M = ~ -81%
    • Quick calc: 13/16 is between 12/16 = 75% and 14/16 = 7/8 = 87.5% ==> Slightly larger than 80%

I'm not seeing the faster way to do this but I'm sure there is. Any help would be greatly appreciated!

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am 14. März 2025

Here's a cleaner approach:

Given:

  • Revenue = $135M
  • Current profit margin = 20% = $27M
  • Target profit margin = 30% = $40.5M
  • Contribution margin = 60%
  • M&S = 15% of total costs

Step 1: Calculate the additional profit needed

  • Additional profit = $40.5M - $27M = $13.5M

Step 2: Since contribution margin is fixed, this additional profit must come entirely from reducing M&S expenses.

Step 3: Calculate current M&S expenses

  • Total costs = $135M - $27M = $108M
  • M&S = 15% of $108M = $16.2M

Step 4: Calculate required reduction

  • Required reduction = $13.5M
  • As percentage of current M&S: $13.5M/$16.2M = 83.3%

This approach is faster because it focuses directly on the gap in profit that needs to be closed through M&S reduction.

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am 14. März 2025
This is great. Thanks so much!
am 13. März 2025
Ex-BCG Principal & Senior Recruiter in Germany | 300+ real recruiting interviews at BCG | Free 15min intro call

Hi Charles, 

below a way to simplify it a bit by omitting some calcs that are not necessary:

Step 1 - Calculate new profit required: $135M x 30% = $40.5M

Step 2 - Calculate change in profit required: $40.5M -$27M = $13.5M

Step 3 - Calculate M&S costs: ($135M - $27M) x 15% = ~$16M

Step 4 - Calculate required reduction in M&S costs: -$13.5M / $16M = ~-85%

Hope that helps. 

Best, 
Sebastian

am 14. März 2025
Super helpful. Thank you!
Pedro
Coach
am 14. März 2025
Bain | EY-Parthenon | Senior Coach | Principal | Recruiting Team Leader

Already some good answers above, just wanted to point out that you don't need the contribution margin information to solve this question.

Florian
Coach
am 14. März 2025
1400 5-star reviews across platforms | 600+ offers | Highest-rated case book on Amazon | Uni lecturer in US, Asia, EU

Hey there,

Think of it this way -> Instead of calculating all intermediate cost elements, you can jump to:

  1. Required cost reduction = Profit increase needed ($13.5m)
  2. Only M&S costs can be cut → Reduce from $16m
  3. % Reduction = $13.5m / $16m ≈ 84%

Cheers,

Florian