ARPU

ARPU provides a standardized way to compare revenue generation efficiency across time periods, customer segments, and competitors. For a SaaS company, ARPU is calculated by dividing Monthly Recurring Revenue (MRR) by the total number of paying customers. A growing ARPU indicates that existing customers are finding more value and paying more over time — a strong signal of product-market fit and effective expansion strategy.

ARPU can be split into new customer ARPU (what new customers pay initially) and existing customer ARPU (what retained customers pay, including expansions). The gap between these two numbers reveals expansion revenue potential. For customer support, ARPU context helps prioritize — high-ARPU customers might receive more personalized, human-assisted support, while lower-ARPU accounts are efficiently served by AI agents, optimizing the cost-to-serve ratio across the customer base.