Free online customer retention rate calculator. Calculate retention rate, required retention targets, and projected customer counts. Compare against SaaS industry benchmarks. Pure client-side.
Customer Retention Rate measures the percentage of customers a company retains over a specific period. It is the inverse of churn rate and is one of the most critical metrics for SaaS and subscription businesses. High retention means product-market fit and sustainable growth.
For SaaS, 93-95% monthly retention is average, while 97%+ is considered excellent. Enterprise SaaS often sees 99%+. B2C and subscription box businesses typically have lower retention (85-92%).
Retention Rate = ((Customers at End - New Customers) / Customers at Start) × 100. This gives the percentage of existing customers you kept during the period.
Retention Rate + Churn Rate = 100%. Retention measures customers kept; churn measures customers lost. They are inverse metrics.
Acquiring new customers costs 5-25x more than retaining existing ones. High retention compounds revenue, improves LTV/CAC ratio, and signals strong product-market fit.