MRR or Monthly Recurring Revenue almost always referred to as MRR, is probably the most important metric at all of any subscription business. It’s what makes this business model so great. Once you acquire a new customer you got a recurring revenue, which means you don’t have to worry about one-off sales every month. Different from traditional sales, it gives you new challenges such as retention and churn.

The general concept is that MRR is a measure of the predictable and recurring revenue components of your subscription business. It will typically exclude one-time and variable fees, but for month-to-month businesses could include such items.