Short answer
A churn spike means customer losses accelerated faster than your normal band, but the first question is whether the spike is voluntary churn, billing-driven involuntary churn, or a measurement change.
What it usually means
The operating meaning changes sharply depending on where the spike came from. A pricing or product problem needs one response. A failed-payments or grace-period problem needs a very different one.
Main causes
- A weak cohort, segment, or acquisition channel started churning at once.
- Failed payments are rolling into involuntary churn after retries expire.
- A product or support incident triggered concentrated cancellations.
- Churn timing policy changed, making the same losses appear earlier.
What to check next
- Check Customer Churn by cohort, plan, and payment status.
- Check Revenue Churn Formula to see whether revenue loss is also spiking.
- Check NRR Formula to confirm whether retention deterioration is broad or isolated.
Product angle
When churn jumps, the real work is isolating the affected slice quickly enough to stop secondary damage. That is a reporting and alerting problem, not just a dashboard problem.