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Net Revenue Retention Calculator

NRR = (Starting ARR + Expansion − Contraction − Churn) ÷ Starting ARR. The single best signal of whether your existing customers grow your revenue or shrink it.

Net Revenue Retention
107.0%
Gross Revenue Retention
87.0%
Ending ARR (this cohort)
$1.1M
VerdictJust above water. Working but not compounding.
Cohort change visualization
Starting ARR
$1.0M
+ Expansion
+$200K
− Contraction
−$50K
− Churn
−$80K
= Ending ARR
$1.1M
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  • Runs in your browser — nothing is stored
  • Shareable link

How to use it

  1. 1
    Use a 12-month cohort window

    Standard. Take customers active 12 months ago and measure their revenue today.

  2. 2
    Don't include new customers

    NRR is a same-customer metric. New revenue from new customers belongs in net new ARR, not NRR.

  3. 3
    Track NRR by segment

    Enterprise customers usually have higher NRR than SMB. Blended NRR can hide important patterns.

What is the net revenue retention calculator?

Net Revenue Retention (NRR) measures how the revenue from a cohort of existing customers changes over time. It's calculated for a specific cohort over a window (usually 12 months):

NRR = (Starting ARR + Expansion − Contraction − Churn) ÷ Starting ARR

NRR > 100%means existing customers grow your revenue. NRR = 100% means flat. NRR < 100% means you're losing more than you're gaining and have to replace it with new customers.

Why it matters for founders

NRR is one of the two or three most important SaaS metrics. Investors at every stage from Series A onwards look at it specifically because:

  • NRR ≥ 110% means the company can grow without new customers. Compounding existing accounts is the most efficient growth.
  • NRR ≥ 130% is best-in-class. Companies like Snowflake, Datadog, MongoDB hit this at scale.
  • NRR < 100% means a leaky bucket. Even fast-growing companies struggle when they can't retain.

Pair with Quick Ratio and Burn Multiple for the full SaaS health view.

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FAQ

What's a great NRR for SaaS?+
≥ 130% is best-in-class. 110-130% is healthy. 100-110% is workable. Below 100% means you're shrinking the existing book.
What's the difference between NRR and GRR?+
GRR (Gross Revenue Retention) excludes expansion — it's just (Starting − Contraction − Churn) ÷ Starting. GRR can never exceed 100%. NRR includes expansion and can.
Should I use ARR or MRR for NRR?+
Either works. ARR-based NRR is annual; MRR-based NRR is monthly. Most companies report annual NRR. Make sure you're consistent.
How is NRR different from net dollar retention (NDR)?+
Same metric, different names. NRR and NDR are interchangeable in 95% of contexts.