Churn Rate

Churn rate tells you what percentage of customers you're losing each period. It's the single most important metric for understanding whether your SaaS business is growing sustainably or just running on a treadmill.

The formula is straightforward: customers lost during a period divided by customers at the start, times 100. Started the month with 500 customers and lost 25? That's 5% monthly churn. If you want to plug in your own numbers, our churn rate calculator does the maths for you.

You'll sometimes hear this called attrition rate. The formula is identical. The difference is context: "churn" is the standard SaaS term, while "attrition" appears more in HR and general business discussions. For the full breakdown, see attrition vs churn.

Why churn rate matters

High churn means you need to keep acquiring customers just to stand still. For most SaaS businesses, monthly churn between 3-8% is typical. Best-in-class companies push below 3%.

Here's the thing: not all churn is the same. Voluntary churn is customers who actively cancel. Involuntary churn is customers lost to failed payments. Involuntary churn often accounts for 20-40% of your total, and it's largely preventable with proper dunning.

Reducing your churn rate

Start with involuntary churn. It's a mechanical problem with a mechanical solution. Automated retry logic, expiring card alerts, and targeted recovery emails can recover the majority of failed payments before the customer even notices anything went wrong. We've seen this move the needle faster than almost any product change.