Involuntary churn
Involuntary churn happens when a subscription ends for a reason the customer did not intend: an expired card, insufficient funds, a bank decline, or a payment that needs authentication. The customer wanted to keep the product; the payment simply did not go through.
It is often a large share of total churn and is the most recoverable kind, because the customer has no reason to leave. The fix is reliable retries and a fast, low-friction way to update the payment method.
churnguardian focuses on involuntary churn first: it watches for failed payments, retries intelligently, and emails a no-login card-update link.