Gross Revenue Retention Calculator

How the figure is built

Gross revenue retention measures what an existing cohort keeps, ignoring expansion: GRR = (starting revenue − contraction − churn) ÷ starting revenue × 100.

Because expansion is excluded, it cannot exceed 100%. It is a pure measure of leakage.

The gap between gross and net retention is the expansion contribution, and knowing which of the two is holding a headline figure up determines what to work on.

The numbers, worked through

The cohort starting at $100,000 with $6,000 of contraction and $18,000 of churn: GRR = (100,000 − 24,000) ÷ 100,000 = 76%.

Net retention on the same cohort was 98%, so expansion of $22,000 was masking a quarter of the base leaking away.

A business at 98% NRR and 76% GRR is holding revenue by selling more to survivors while losing customers steadily. One at 98% NRR and 94% GRR is a fundamentally healthier business with the same headline number.

The two are frequently reported as interchangeable and they describe opposite situations.

Where the figure deceives

GRR alone understates a business that grows naturally within accounts, and it is the more pessimistic of the pair by construction. Neither figure is complete without the other.

It also depends on how contraction is defined for transactional businesses, where a customer simply spending less is not a formal downgrade and may just be a slow quarter.

Acting on it

Report both and watch the gap. A widening gap means expansion is doing more work to cover worsening churn, which is a deteriorating position dressed as a stable one.

Then treat GRR as the retention metric and NRR as the growth metric. The first tells you whether the product holds customers; the second tells you whether the account grows.

Why investors ask for both

A business can engineer a high NRR by concentrating on a small number of large, expanding accounts while shedding everything else. That produces an impressive headline and a fragile revenue base.

GRR exposes it, because it counts the departures regardless of what the survivors did. The pair together describe both the durability and the growth of the base.

For a self-assessing business the same logic applies without any external pressure. If GRR is well below NRR, the roadmap question is retention rather than expansion, and working on upsell while the base leaks is the more expensive of the two mistakes.

Contract length affects the figure mechanically, since annual contracts can only churn at renewal while monthly ones can churn at any point. Comparing businesses on different terms without adjusting for it is misleading.

For that reason the metric is most useful measured within a business over time rather than across businesses with different commercial models.

Tracking the reasons behind contraction separately from those behind churn is worth doing, since a downgrade and a cancellation usually have different causes and different remedies.

Renewal timing concentrates risk in particular months for annual contracts, and a calendar of upcoming renewals is what turns the metric into something that can be acted on before rather than after.