Net Revenue Retention (NRR)
The percentage of recurring revenue retained from existing customers over a given period, including expansion, downgrades, and churn.
FORMULA
NRR = (Starting ARR + Expansion ARR - Contraction ARR - Churned ARR) / Starting ARRWhy it matters
Net Revenue Retention measures the compounding power of a SaaS customer base. An NRR above 100% means the business grows even if it acquires zero new customers, as expansion from the existing base outpaces lost revenue from churn. Investors view high NRR as proof of strong product-market fit and deeply embedded product value. It drastically reduces the pressure on new customer acquisition and improves the LTV:CAC ratio. In enterprise SaaS, driving NRR toward 120% or higher is often more capital-efficient than spending heavily to acquire new logos, as upselling an existing customer typically costs one-third as much as acquiring a new one.
2025 BENCHMARK
Benchmarkit Q4 2025 reports a median NRR of 106% for private SaaS companies, with top-quartile performers exceeding 115%.
COMMON MISTAKES
- Calculating NRR over a non-standard period without annualizing it.
- Excluding contraction revenue and only looking at churn and expansion.
- Failing to cohort NRR by customer segment, which often masks high churn in the SMB base.