What is NRR?
Net Revenue Retention (NRR): also called Net Dollar Retention (NDR): is the SaaS metric measuring the percentage of recurring revenue retained from existing customers over a defined period (typically 12 months), including upsell and expansion revenue but excluding new customer acquisition. NRR can exceed 100% when expansion outpaces churn and contraction: a signal of product stickiness and natural account growth. NRR is widely considered the single most important SaaS health metric for investor diligence.
NRR formula
NRR = (Starting MRR + Expansion MRR – Churned MRR – Contraction MRR) / Starting MRR × 100
- Starting MRR: recurring revenue from existing customers at period start.
- Expansion MRR: upsell, cross-sell, seat additions, price increases from existing customers.
- Churned + Contraction MRR: same as GRR calculation.
- Excludes: new customer revenue acquired during the period.
NRR benchmarks by segment
- SMB SaaS: 95-105% NRR typical; expansion limited by small-account TAM.
- Mid-market SaaS: 105-115% NRR typical.
- Enterprise SaaS: 110-130%+ NRR typical; seat/usage expansion drives growth.
- Best-in-class (PLG and usage-based): 130-150%+ NRR (Snowflake reportedly 158% at IPO, Datadog 130%+).
NRR drivers and lessons
- Usage-based pricing: typically delivers higher NRR than seat-based because expansion happens automatically with consumption.
- Land-and-expand motion: intentional product/sales design for initial small footprint that grows over time.
- Net new logos vs. existing-base growth: as companies scale, NRR-driven growth becomes mathematically more impactful than new logo acquisition.
- Investor signalling: growth-stage SaaS investors place primary diligence weight on NRR: <110% is often disqualifying for premium valuations.
NRR in documents
Because NRR is the growth-quality headline, it migrates into binding text: venture-debt covenants, earn-outs, incentive plans, and there the definitional load is heavy: the revenue base (ARR or MRR), cohort window, currency normalisation in lira-exposed businesses, and the upgrade/downgrade/churn taxonomy all move the number by points. Diligence pairs it with GRR and recomputes both from billing exports; an NRR quoted without its GRR sibling invites exactly the question it was hoping to avoid. When the metric carries money, attach the formula with worked examples, and keep marketing claims (“120% NRR”) versioned to the measurement date, since stale superlatives in decks are misrepresentation kindling.
Working on this? Vircon Legal advises on SaaS & IT Contracts and Technology Law. Talk to us →
If this is on your desk
Templates and checklists are free in the Founder Academy; for a specific situation, book a 30-minute intro call.
Founder AcademyBook an intro call