SaaS, and other recurring revenue businesses are different because the revenue for the service comes over an extended period of time (the customer lifetime). If a customer is happy with the service, they will stick around for a long time, and the profit that can be made from that customer will increase considerably. On the other hand if a customer is unhappy, they will churn quickly, and the business will likely lose money on the investment that they made to acquire that customer. This creates a fundamentally different dynamic to a traditional software business: there are now two sales that have to be accomplished:
Acquiring the customer
Keeping the customer (to maximize the lifetime value).
Because of the importance of customer retention, we will see a lot of focus on metrics that help us understand retention and churn. But first let’s look at metrics that help you understand if your SaaS business is financially viable.