NDR vs GDR: What The Difference Actually Tells You

Net revenue retention and gross revenue retention are usually reported side by side on the same dashboard. Most people read NDR and ignore GDR. The diagnostic value lives in the second number.

What each metric measures

GDR is the percentage of revenue retained from existing customers, ignoring expansion. It tracks pure churn and contraction. A GDR of ninety percent means the cohort lost ten percent of its revenue from cancellations and downgrades. Full stop.

NDR is the percentage of revenue retained including expansion. A cohort that loses ten percent to churn but adds twenty percent through expansion has a GDR of ninety and an NDR of one hundred ten. The same cohort, same churn, looks excellent through one lens and concerning through the other.

Why the gap matters

The gap between NDR and GDR is the size of expansion as a fraction of the existing base. A small gap means the company is acquiring most of its growth from new logos. A large gap means expansion is doing significant work, and that work is masking the churn underneath.

Both can be healthy patterns. Both can also be dangerous ones. The question is whether you know which.

The diagnostic framework

Three states are worth distinguishing:

• High NDR, high GDR: the customer base is genuinely sticky and growing. This is the healthiest pattern.
• High NDR, low GDR: expansion is masking a retention problem. The headline number looks good. The unit economics deteriorate quietly.
• Low NDR, low GDR: both retention and expansion are weak. Usually a product-market-fit issue rather than a sales motion issue.

The most dangerous of the three is the second. The headline reassures the board. The unit economics tell a different story two quarters later, when the expansion engine slows and the churn becomes visible.

What to do with the answer

GDR is the truth-teller. Track it weekly. When it moves, find out why before the NDR catches up.