Net Revenue Retention Calculator
Net and gross revenue retention from expansion, contraction and churn — with what NRR alone does to revenue over five years.
NRR is starting revenue plus expansion, less contraction and churn, over starting revenue.
How the net revenue retention calculator works
NRR is starting revenue plus expansion, less contraction and churn, over starting revenue. Above 100% the existing base grows on its own, which is why it is the metric investors watch most closely.
Gross retention strips out expansion and shows only what you kept. The gap between the two is how much upsell is masking churn — a business at 110% NRR and 80% GRR is losing a fifth of its customers a year and hiding it.
Formula: NRR = (start + expansion − contraction − churn) / start
Worked examples
| Inputs | Net revenue retention | Note |
|---|---|---|
| 100k base, 15k expansion, 10k lost | 105% | 105% NRR, 90% GRR |
| Strong expansion | 120% | 120% NRR |
| Heavy churn | 91% | NRR below 100% |
FAQFrequently asked questions
What is a good NRR?
Above 100% means the existing base grows without new sales. Best-in-class enterprize software reaches 120% or more; 90% is common in SMB products.
Why does the gap between NRR and GRR matter?
Because expansion can hide serious churn. A business at 110% net and 75% gross is losing a quarter of its revenue base annually and papering over it with upsell.
Which do investors care about?
Both, and increasingly gross. Net retention flatters businesses with a few large expanding accounts.
How is NRR different from logo retention?
Logo retention counts customers; NRR counts revenue. Losing many small accounts while growing a few large ones looks fine on NRR and terrible on logos.
Does new business count?
No. NRR measures only the existing cohort — that is the whole point of it.
Where these figures come from
- Reichheld (2003), Harvard Business Review — The One Number You Need to Grow — the paper that introduced Net Promoter Score
- US Securities and Exchange Commission — the US securities regulator
Last checked: September 2026. These are the industry-standard definitions; where companies commonly disagree, the page says so.