Net Revenue Retention (NRR) Calculator
Net Revenue Retention measures how much recurring revenue you keep and grow from your existing customer base over time, excluding any new customers — and it has become the metric SaaS investors scrutinize above almost all others. It takes your starting MRR, adds expansion from upgrades and seat growth, then subtracts contraction from downgrades and revenue lost to churn. An NRR above 100% is the hallmark of an elite business: it means your existing customers generate more revenue each period even if you never sign a single new logo, so revenue compounds on its own. NRR below 100% means your base is leaking and new sales must run just to replace what you lose. Enter your MRR movements to measure the stability and expansion power of your customer base.
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Results update live as you type. Estimates only — not financial, tax, or investment advice.
The Formula
NRR = (Starting MRR + Expansion − Contraction − Churn) ÷ Starting MRR × 100
Understanding the Net Revenue Retention (NRR) Calculator
NRR above 100% — sometimes called negative net churn — is a growth flywheel. The best SaaS companies post NRR of 120% or higher, meaning the existing customer base alone grows revenue 20% year over year through expansion, more than offsetting all churn and contraction. This is extraordinarily valuable because expansion revenue carries almost no acquisition cost, so high NRR directly lifts margins, lifetime value, and valuation multiples.
It is worth distinguishing NRR from gross revenue retention (GRR). GRR measures only the revenue you keep before any expansion — it can never exceed 100% and shows how leaky your base is. NRR adds expansion on top and can exceed 100%. Looking at both is powerful: a high NRR built on strong expansion can mask an underlying churn problem that GRR exposes. Investors want to see healthy GRR and NRR together, because durable expansion on top of a leaky base is far riskier than expansion on top of a well-retained one.
Frequently Asked Questions
What is a good net revenue retention rate?
100% is the break-even line where expansion exactly offsets churn and contraction. Good SaaS businesses exceed 100%; best-in-class companies reach 120% or higher, meaning the existing customer base grows revenue 20%+ on its own. Below 100% means your base is shrinking and new sales must replace the loss.
What's the difference between NRR and GRR?
Gross revenue retention (GRR) counts only revenue retained before expansion, so it caps at 100% and shows how leaky your base is. Net revenue retention (NRR) adds expansion revenue and can exceed 100%. Reviewing both reveals whether strong expansion is masking an underlying churn problem.
Why do investors care so much about NRR?
Because NRR above 100% means revenue compounds from the existing base with almost no acquisition cost, driving high margins and predictable growth. It is one of the strongest signals of product-market fit and pricing power, and it correlates closely with premium SaaS valuation multiples.