Customer Retention Rate Calculator

The formula: ((Customers at End − New Customers) / Customers at Start) × 100. You subtract new customers so you're measuring actual retention, not masking churn with fresh sign-ups. If you started with 500 customers, ended with 470, and acquired 30 new ones, your retention rate is 88%.

Or the shortcut: 100% minus your churn rate. Same result, less maths.

In practice, two percentage points doesn't sound like much. But going from 95% to 97% monthly retention means the difference between keeping 54% of your customers over a year and keeping 69%. Compounding is relentless, and it works in both directions.

The fastest lever for improving retention is addressing involuntary churn. Failed payments account for 20-40% of all SaaS churn, and those customers didn't choose to leave. Automated dunning recovers the majority of them without touching your product or pricing.

For B2B SaaS, 85-95% annual retention is the healthy range. Enterprise SaaS with longer contracts and higher switching costs often sits above 95%. SMB-focused products typically land at 80-90% because of higher natural attrition.

Below 80% is a red flag. It usually points to product-market fit issues, pricing misalignment, or a large chunk of involuntary churn that nobody's bothered to fix. We've seen SaaS companies jump 5-10 points just by implementing proper failed payment recovery.

Monthly retention above 97% is strong. Above 99% is exceptional and usually only seen in deeply embedded enterprise tools where switching costs are high.