Churn net of expansion
Net dollar churn is the percentage of recurring revenue lost from an existing cohort over a period, net of expansion, and when expansion wins, it goes negative. It nets the two forces acting on an existing base: revenue lost to churn and contraction, and revenue gained from expansion. If a cohort loses eight percent but expands twelve percent, its net dollar churn is negative four percent, meaning the base grew without a single new customer. That negative figure is the goal, and it captures the compounding power that makes SaaS economics attractive.Negative churn is the target
The counterintuitive language, wanting churn to be negative, points at a real and desirable dynamic:
- Positive net dollar churn: the base is shrinking, losses exceed expansion. - Zero: expansion exactly offsets losses, the base holds flat. - Negative: expansion exceeds losses, the base grows on its own.
Achieving negative net dollar churn means a company can grow from its existing base before adding any new logos, which is the most efficient growth there is.
The mirror of net revenue retention
Net dollar churn and net revenue retention are two framings of the identical dynamic: net revenue retention above 100% is exactly negative net dollar churn. One counts what you kept and grew; the other counts what you net lost; both measure expansion against churn and contraction on an existing cohort. The choice of framing is stylistic, though net revenue retention is the more common label. What matters is the underlying reality both describe: whether the existing base is a growth engine or a leaking bucket. This is distinct from gross revenue churn, which measures only the losses without expansion, and it depends on the same distinction between churn and contraction that churn versus contraction draws. A company driving toward negative net dollar churn is building the compounding base that lets growth accelerate rather than requiring ever more new-logo sales just to stay ahead of losses, which is why it is one of the most watched dynamics in any recurring-revenue business.
Frequently Asked Questions
What is net dollar churn?
Net dollar churn is the net percentage of recurring revenue lost from an existing customer cohort over a period, after subtracting expansion revenue from churn and contraction. If a cohort loses 8% to churn and contraction but gains 12% from expansion, net dollar churn is negative 4%, meaning the cohort grew.
What is negative net dollar churn?
Negative net dollar churn means expansion revenue exceeded revenue lost to churn and contraction, so the existing base grew on its own. It is the goal, and it is the mirror image of net revenue retention above 100%. Negative churn is a hallmark of an efficient, compounding SaaS model.
How does net dollar churn relate to net revenue retention?
They are two expressions of the same thing. Net revenue retention above 100% is equivalent to negative net dollar churn: both mean the existing base is growing after netting expansion against losses. One frames it as retention, the other as churn, but they describe the identical dynamic.
Put these metrics to work
ORM builds custom revenue forecast models that turn concepts like net dollar churn into prescriptive action for your team.
Schedule a Demo