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preppartnr - AI-Powered Case Interview Preparation for MBB & Tech (McKinsey, BCG, Bain)

PrepPartnr Academy

SaaS & Technology Foundations

Category: Industries • Duration: 10 min • Difficulty: Intermediate

What You'll Learn

Model SaaS unit economics (recurring revenues, churn, LTV, CAC, and payback periods).
Analyze Net Retention Rate (NRR) and cohort expansion levers.
Evaluate strategic choices between Enterprise sales-led vs Product-Led Growth self-serve models.

Lesson Overview

Master subscription annual recurring revenues (ARR), Customer Acquisition Cost (CAC), Net Retention Rate (NRR), and Product-Led Growth (PLG) expansion dynamics.

Imagine your interviewer says: "Your client is SaaSCo, a B2B project management software company with $100M in ARR. Their marketing team is spending heavily, but customer churn is rising and their CAC payback period has expanded to 30 months. The CEO wants to know if they should shift from enterprise sales reps to a product-led growth (PLG) self-serve model."

Why This Matters for Consulting Interviews

SaaS cases test your structured tracking of customer cohorts, recurring unit economics, and capital efficiency (spend efficiency vs growth rate).

Prerequisites

Pricing Strategy
Recommendation & Synthesis

Related Frameworks

Start This Lesson on PrepPartnr

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