SaaS Metrics

SaaS metrics are the specific financial and operational KPIs used to measure how a subscription software business is performing. Because SaaS revenue is recurring rather than one-time, traditional business metrics do not capture the full picture. SaaS metrics were developed to account for the unique economics of subscription models.

The essential SaaS metrics include: Monthly Recurring Revenue (MRR) and Annual Recurring Revenue (ARR), which measure your predictable revenue base. Customer Acquisition Cost (CAC), which measures how much you spend to acquire each new customer. Lifetime Value (LTV), which estimates total revenue from a customer over their relationship with you. Churn rate, which measures how many customers or how much revenue you lose each period. Net Revenue Retention (NRR), which measures whether existing customers are growing or shrinking in value.

The ratios between these metrics tell the real story. LTV-to-CAC ratio indicates whether your unit economics are sustainable — most investors want to see 3:1 or higher. CAC payback period shows how many months it takes to recover acquisition costs — under 18 months is the benchmark. NRR above 100% means your existing customer base is growing even without new customers.

These metrics should be tracked at the company level but also segmented by customer size, acquisition channel, product line, and cohort. A company with 120% NRR overall might discover that enterprise NRR is 140% while SMB NRR is 85%, leading to very different strategic decisions.

Building a reporting infrastructure that calculates these metrics consistently and keeps them current allows leadership to make informed decisions about where to invest and where to course-correct.