What is retention rate?
Retention rate is the percentage of customers (or revenue) a business retains over a defined period: the inverse of churn. In SaaS and subscription businesses, retention is the single highest-leverage metric: small improvements compound dramatically over time, and high retention is the primary driver of LTV and capital efficiency.
Formulas
Customer retention over a period:
Customer Retention = (Customers at End − New Customers Added) ÷ Customers at Start
Gross revenue retention (GRR):
GRR = (Start Revenue − Churn Revenue − Contraction Revenue) ÷ Start Revenue
Net revenue retention (NRR):
NRR = (Start Revenue − Churn − Contraction + Expansion) ÷ Start Revenue
Retention vs. related metrics
- Customer retention vs. revenue retention: a customer churn while others expand may show flat GRR but falling customer retention: a hidden risk.
- GRR vs. NRR: GRR caps at 100% (no expansion credit); NRR can exceed 100% if expansion outpaces churn. Best-in-class SaaS prints NRR > 120%.
- Logo retention vs. dollar retention: logo counts customers regardless of size; dollar weights by revenue.
SaaS benchmarks (2025)
- SMB SaaS: GRR 85-90%, NRR 100-110%.
- Mid-market SaaS: GRR 90-95%, NRR 110-125%.
- Enterprise SaaS: GRR 95%+, NRR 120-140% in top quartile.
- Consumer subscriptions: 70-85% monthly retention varies dramatically by category.
Why retention is the highest leverage
A 5% improvement in retention compounds to 25%+ improvement in profit over time (Bain study), because retained customers have lower service cost, higher expansion likelihood and zero acquisition cost amortisation. The fastest-growing public SaaS companies are those with the best NRR, not those with the lowest CAC.
Do: build a cohort retention table at month 1, 3, 6, 12 and beyond; treat the steepest drop-off as a product or fit problem to solve.
Don’t: mask retention problems with aggressive acquisition: the leaky bucket eventually overwhelms even unlimited spend.