Net Revenue Retention
NRR and GRR for a period from starting MRR, expansion, contraction and churn — with the annualised rates, ending MRR, the SaaS quick ratio and logo churn.
Net and gross revenue retention for the period and annualised, retained and ending MRR, net new MRR, the quick ratio and logo churn — definitions stated, new-customer MRR kept out of retention.
Example: 100,000 starting MRR, +12,000 expansion, −3,000 contraction, −5,000 churn: NRR 104 %, GRR 92 %; with 15,000 new MRR the quick ratio is 3.4 and ending MRR 119,000 (160 % NRR annualised).
Retention counts
the customers you already had.
The two retention rates, why new customers are left out, and the companions.
NRR and GRR
Take the customers who existed at the start of the period. NRR = (their starting MRR + expansion − contraction − churn) ÷ starting MRR; it can exceed 100 % when upgrades outweigh losses. GRR leaves expansion out, so it is at most 100 % and shows pure leakage.
New customers
MRR from customers won during the period is growth, not retention, and is excluded from both rates by definition. It enters only the ending MRR and the quick ratio — (new + expansion) ÷ (contraction + churn) — which compares everything gained with everything lost.
Annualising and logos
Annualised rates raise the period rate to the power of periods per year and assume the period repeats — a compounding illustration, not a forecast. Logo churn (customers lost ÷ customers at start) is shown alongside because revenue and customer counts can move differently. Nothing leaves the browser; the same four anonymous usage counts as the rest of the site apply.
SOURCES
- NRR = (start + expansion − contraction − churn) ÷ start; GRR excludes expansion; quick ratio = (new + expansion) ÷ (contraction + churn) — standard SaaS metric definitions
Last reviewed 20 September 2026. How results are checked: How we verify.