Revenue retained + expanded from cohort. The Net Revenue Retention (NRR) Calculator takes mrr from the cohort at the start, expansion mrr from that cohort, churned mrr, contraction mrr and returns net revenue retention plus mrr from the cohort now, reading. Results update as you type, and the formula is shown under the result so you can repeat it in your own spreadsheet.
Startup metrics are about the efficiency of growth: how much it costs to win and keep customers, how fast recurring revenue compounds, and how long the cash lasts. Investors read these numbers before they read the pitch. Use the worked example below to check the maths against your own figures.
How the Net Revenue Retention (NRR) Calculator works
Net revenue retention above 100% means existing customers pay you more over time even after losses. Best-in-class SaaS companies run 110–130%.
Worked example
With the example values (mrr from the cohort at the start of $100,000, expansion mrr from that cohort of $8,000, churned mrr of $4,000, contraction mrr of $2,000), the net revenue retention is 102%; mrr from the cohort now $102,000.00, reading Good: expansion offsets churn. Change any figure above and the result updates immediately; use Copy results to paste the summary into a note or email.
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Frequently Asked Questions
How is net revenue retention calculated?
NRR = (starting MRR + expansion − churn − contraction) ÷ starting MRR.
Which figures do I need?
Mrr from the cohort at the start, expansion mrr from that cohort, churned mrr, contraction mrr. Take them from the same period and the same set of accounts or reports so the ratio is consistent, and check the example values as a guide to the units expected.
What do investors consider healthy?
Common benchmarks: LTV:CAC above 3, CAC payback under 12–18 months, net revenue retention above 100%, monthly churn under 2% for SMB and under 1% for enterprise, and at least 12–18 months of runway.
