What Is Monthly Recurring Revenue (MRR) A measure of revenue generation by month is the monthly recurring revenue (MRR). Many Software-as-a-Service (SaaS) businesses regard this as the holy grail metric” because it offers an up-to-date assessment of the health of the enterprise from an income point of view. Monthly recurring revenue can be broken into specific categories such as fresh company MRR, growth MRR, and churned MRR for more in-depth insight.