What is net revenue retention?
Short answer: Net revenue retention, or NRR, shows how recurring revenue from an opening customer cohort changes through expansion, contraction and churn. It differs from gross revenue retention because NRR gives credit for expansion, and it excludes revenue from newly acquired customers.
NRR above 100% means expansion within the opening cohort exceeded contraction and churn. NRR below 100% means that cohort became smaller. The revenue basis may be monthly recurring revenue, annual recurring revenue or another contracted recurring measure. Usage changes, price increases and additional products can count as expansion if the definition allows. Currency movements, acquisitions, reactivations and migrations between products require consistent policies. The metric says nothing directly about new bookings, acquisition cost, gross margin or cash collection.
How it works
Identify the customers and recurring revenue present at the start of the measurement period. Freeze that cohort, then reconcile its opening revenue through expansion, contraction and churn to its closing recurring revenue. Do not add revenue from customers first acquired during the period. Define treatment of price, usage, pauses, account mergers, foreign exchange and contract changes. Reconcile the KPI to billing or contract records and explain differences from accounting revenue. Track monthly, quarterly and annual cohorts at comparable maturity. Pair NRR with gross retention and concentration because expansion from one large customer can conceal broad customer loss.
NRR = (opening recurring revenue + expansion - contraction - churn) / opening recurring revenue
Example
An opening cohort contributes 1,000 of annual recurring revenue. Existing customers add 140 through upgrades and price changes, while downgrades remove 50 and cancellations remove 90. Closing recurring revenue from that same cohort is 1,000 + 140 - 50 - 90 = 1,000, so NRR is 100%. During the year, new customers add another 300, but that amount is excluded. If one customer provided 120 of the expansion, NRR would still be 100%, so concentration analysis remains necessary.
Why it matters
NRR shows whether the opening customer base is compounding or shrinking before new customers are added. Management uses the drivers to coordinate pricing, customer success and product adoption with the forecast. Buyers and investors test cohort files, contract terms, concentration and gross retention before relying on the metric for valuation. Lenders use the same evidence only as one input to recurring-revenue and downside analysis.
NRR is a company-defined KPI, not revenue recognized under IFRS or US GAAP. A high result can depend on a few expansions, contractual price increases or inflation rather than broad customer health. It can also coexist with weak cash collection or low margin. Different cohort dates, currencies and recurring-revenue definitions prevent direct comparison. Public disclosure should define the calculation, usefulness and changes, while diligence should reconcile the metric to customer-level records.