NRR calculator
Calculate Net Revenue Retention from starting MRR, expansion, contraction, and churn. NRR above 100% means you grow from your existing customer base alone.
Calculate your Net Revenue Retention
Enter your starting MRR and the four MRR movement components for the period. Result updates instantly.
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MRR at the start of the period (from existing customers only).
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Net Revenue Retention
107.0%
Net new from existing: +$7,000/mo
NRR = (Starting MRR + Expansion − Contraction − Churn) / Starting MRR
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What counts in each input?
- Starting MRR — the MRR from the customers you had at the beginning of the period.
- Expansion MRR — upgrades, more seats, add-ons from those same customers.
- Contraction MRR — downgrades, removed seats from those customers.
- Churned MRR — customers who fully cancelled.
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How NRR is calculated
NRR = (Starting MRR + Expansion − Contraction − Churn) / Starting MRR × 100%
New customers acquired in the period are excluded — NRR measures retention of existing customers only.
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Benchmarks
- <90% — losing existing customers faster than expanding them
- 90–100% — net flat from existing base
- 100–110% — healthy expansion
- 110%+ — best-in-class; existing customers alone fund growth