Net New MRR Calculation

This question practices a core SaaS metric, monthly recurring revenue growth, and tests whether a candidate can separate growth from retention and expansion. In an investment banking interview, that matters because analysts are often expected to understand how recurring revenue businesses add value, how customer acquisition and upselling affect revenue, and how churn can offset growth. The problem also checks basic metric literacy, since interviewers want to see that candidates can define a metric clearly and reason through the components that drive it without confusing new customer revenue, expansion revenue, and lost revenue from departing customers.