Net Churn

Net churn takes the full picture into account. It starts with everything you lost to cancellations, downgrades, and failed payments, then subtracts what you gained from existing customers through upgrades and add-ons. The result tells you whether your installed base is growing or shrinking in value.

That makes it the metric investors ask about first.

How to calculate net churn

Net churn rate = (Churned MRR + Contraction MRR - Expansion MRR) / Starting MRR x 100

Start the month with $100,000 in MRR. You lose $5,000 to cancellations and downgrades, but existing customers upgrade by $3,000. Your net churn is 2%. If those upgrades had been $6,000 instead, net churn would be -1%, and you've crossed into negative churn territory.

When net churn goes negative

Negative net churn means your existing customer base is growing in value without new sign-ups. Expansion outpaces losses. This shows up as net revenue retention (NRR) above 100%, and it's the goal for any SaaS business with an expansion path.

In practice, we've seen that companies crossing into negative net churn grow faster even when their acquisition rate stays flat. The compounding effect is real. Stripe's dashboard and tools like ChurnWard make it straightforward to track whether you're trending in this direction.

The risk of tracking only net churn

Here's the thing: net churn can hide problems. A business with 7% gross churn and 1% net churn looks fine on the surface. But that 7% means customers are leaving at a concerning rate, and expansion revenue is papering over it. If expansion slows down, net churn spikes and you're left scrambling.

We've found that SaaS businesses tracking only net churn often miss early warning signs. Expansion can mask a deteriorating retention problem for several quarters before it becomes impossible to ignore. Track both. For the full comparison, see gross churn vs net churn.

Reducing net churn

Two paths. First, reduce losses. Twenty to 40% of revenue churn comes from failed payments rather than deliberate cancellations. Recovering those through dunning directly improves net churn without touching product or pricing. Second, increase expansion MRR through usage-based pricing, seat growth, and add-on offers.