Net Revenue Retention (NRR) is a critical metric for subscription-based and SaaS businesses, measuring the percentage of revenue retained from existing customers over a given period. It accounts for upgrades, cross-sells, downgrades, and churn, offering a comprehensive view of customer revenue stability. NRR is calculated using the formula: (Starting Revenue + Expansion Revenue – Churn Revenue) / Starting Revenue ? 100. A figure above 100% indicates that revenue from existing customers has grown, even after considering churn. NRR is an essential KPI for investors, as it reflects the long-term financial health of a company. A high NRR suggests that a business successfully expands customer accounts and mitigates churn, leading to sustainable growth. Many CRM systems incorporate NRR tracking to provide real-time insights into customer engagement and revenue trends. Businesses can improve NRR by enhancing customer success efforts, implementing strategic upselling tactics, and offering proactive support. Strong retention strategies result in a higher customer lifetime value (CLV), improved revenue predictability, and stronger brand loyalty.