Complete guide to NRR: formula, benchmarks, and why it matters for SaaS.
NRR measures the percentage of recurring revenue retained from existing customers over a period, including expansion, contraction, and churn. It is the metric that most directly predicts SaaS company health.
A company growing 50% year-over-year with 100% NRR is building durable value. A company growing 50% with 70% NRR is burning money to replace lost revenue. Growth rate tells you the headline; NRR tells you the truth.
For SMB-focused SaaS, 100-110% is healthy. For enterprise SaaS, 115-130% is the target. Below 90% NRR indicates serious retention problems that require immediate attention.
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Understanding what is net revenue retention (nrr)? as a concept is the easy part. The harder part — and the part that actually matters in a deal — is computing it accurately from a revenue ledger you did not build, under time pressure, with a seller whose interests are not aligned with yours. The workflow below is the one ChurnLens automates, but it is also the one you can follow manually in a spreadsheet if you understand the mechanics.
Step one: request the monthly MRR-by-customer ledger with contract start date, contract end date, plan type, and monthly revenue. This is a standard data-room ask and should be the first one you make, not the last. Step two: compute what is net revenue retention (nrr)? under a consistent definition — exclude trials, include downgrades, separate annual from monthly plans. Step three: segment by acquisition cohort to see whether retention is improving or deteriorating over time. Step four: compare your reconstructed figure to the one in the seller's pitch deck.
The gap between steps two and four is the diligence finding. If your reconstructed what is net revenue retention (nrr)? is materially worse than the reported figure, you have found the specific customers and cohorts driving the divergence, and you have the evidence to either renegotiate or walk. If the numbers match, you have verified the seller's claims and can proceed with confidence. Either outcome is worth the effort.