The revenue a customer cohort produces today as a percentage of what the same cohort produced a year ago, after churn, downgrades and expansion. The metric that shows whether a business grows without new customers.
NRR above 100 per cent is the closest thing subscription businesses have to a perpetual motion claim: the base grows even if sales stop. Which is why how the cohort was drawn deserves more attention than the headline.
Last reviewed 3 July 2026 · Free and ungated
Selected senior operators who have examined recurring-revenue businesses can pull the metric apart before it anchors a price.
Challenge the assumptions before committingNet revenue retention takes the customers who existed at a start date, measures their recurring revenue then and twelve months later, and expresses the second as a percentage of the first. Expansion, upgrades and price increases push it up; churn and downgrades pull it down. New customers acquired during the period are excluded entirely. At 110 per cent, the existing base grew by a tenth on its own; at 90, the business must sell hard just to stand still.
NRR is a compressed verdict on product value, pricing power and account health, which is why valuations lean on it. It deserves two qualifications. Composition matters: 105 per cent achieved through broad, modest expansion is durable, while the same figure achieved through price rises on a captive base, or one anchor account doubling, is fragile in ways the number conceals. And it trails reality: contracted revenue keeps NRR respectable for quarters after customer sentiment has turned, so the metric deteriorates later than the relationships behind it.