GRR and NRR are both revenue retention metrics, but they answer different questions — and conflating them is one of the most common mistakes in SaaS reporting.
The formulas side by side
The only difference is expansion MRR (upsells, upgrades) in the numerator. That one term changes the ceiling: GRR can never exceed 100% (you can't retain more revenue than you started with), while NRR can exceed 100% if expansion outpaces churn.
What each metric tells you
GRR isolates how sticky your existing customer base is, independent of your ability to sell more to them. It's a pure measure of churn and downgrade risk.
NRR tells you whether your total existing-customer revenue is growing or shrinking, including the effect of upsells. A company can have alarming churn masked by strong expansion — that's exactly the gap GRR is designed to expose.
The combination that matters most
| GRR | NRR | What it means |
|---|---|---|
| 95%+ | 110%+ | Best case — low churn, strong expansion |
| 80% | 120%+ | Churn problem hidden by aggressive upselling |
| 95%+ | 100–105% | Sticky base, limited expansion motion |
| < 80% | < 100% | Retention crisis on both fronts |
The second row is the trap investors specifically look for: a company reporting a headline NRR above 100% while GRR reveals the underlying customer base is actually leaking badly.
Frequently asked questions
Which metric should I lead with in a board deck? Report both. NRR alone can hide a churn problem; GRR alone hides growth from your happiest customers. Together they give the full picture.
Do investors weight one more than the other? Growth-stage investors focus heavily on NRR as a growth-efficiency signal, but will always ask for GRR once NRR looks unusually high, specifically to check it isn't masking churn.
Use the Gross Revenue Retention Calculator to compute your GRR, and compare it against your NRR to spot the gap.