Challenger Bank Profitability

This problem tests your understanding of how challenger banks make money and whether a digital-first banking model can support long term profitability. It focuses on the freemium approach, where customers are attracted with low cost or free core accounts and the bank tries to earn revenue from premium subscriptions, add on services, and other paid features. In an investment banking interview, questions like this check whether you can think through the economics of a growth stage financial institution, including customer acquisition, monetisation, operating leverage, and the tradeoff between scaling quickly and reaching break even. Interviewers ask this kind of question to see if you can assess whether a business model is commercially viable, not just popular with consumers.