Net Revenue Retention (NRR) Calculator
See how your existing customers' recurring revenue moved, after expansion, contraction and churn.
Net Revenue Retention (NRR)
101.00%
Enter your numbers and press Calculate.
(Starting MRR + Expansion MRR - Contraction MRR - churn) ÷ Starting MRR
Worked example
(start + expansion − contraction − churn) ÷ start
What this number tells you
Four inputs, two answers. NRR counts expansion; GRR does not. Reported together they show how much of the base's revenue survived, and how much growth came from customers you already had.
NRR goes above 100% when expansion outweighs contraction and churn combined: the base grew its own revenue without a single new customer. Isolating that from new-customer revenue is the whole reason to track it separately.
When to use it
When assessing the health of a subscription base, when expansion revenue is a real part of the model, and when a headcount-based retention number is hiding what is happening to revenue.
Where it misleads
An NRR reported without its period cannot be compared with anything: a monthly and an annual figure from the same business are different numbers. Leaving contraction out and counting only full churn overstates retention.
Frequently asked questions
Is Net Dollar Retention the same as NRR?
Net Dollar Retention (NDR) is the same calculation as NRR under a different name, used by some companies and analysts.
What is 'Revenue Churn' here?
Revenue churn is GRR's complement (1 − GRR): the share of starting MRR lost to contraction and churn, before counting any expansion.