Negative Churn Indicator
Net negative churn is the moment a subscription business starts to compound on its own: the existing base grows revenue faster than departures shrink it, so the company would grow even with no new sales. Enter your MRR movements to see whether you are there yet.
You have net negative churn when expansion MRR exceeds the sum of churned and contraction MRR — equivalently, when net revenue retention (NRR) is above 100%. NRR = (starting MRR + expansion − contraction − churned) ÷ starting MRR × 100%. Above 100%, your installed base grows revenue on its own; at 100% expansion exactly offsets losses; below 100% you have net positive churn and every new sale first has to refill a leaking bucket. NRR above 100% is one of the strongest signals in subscription economics.
Negative Churn Indicator inputs and result
| NRR | What it means |
|---|
How to use this calculator
- Set the cohort and the periodPick the existing-customer base at the start of a period — this is the only group NRR measures. New customers won during the period are excluded; they belong to acquisition, not retention.
- Enter starting MRRUse the recurring revenue from that cohort at period start. This is the denominator, so it must reflect the same customers you are tracking through the period.
- Split your losses correctlySeparate full cancellations (churned MRR) from downgrades where the customer stayed (contraction MRR). The split matters because the two have different fixes.
- Enter expansion MRRAdd the recurring revenue existing customers added through upgrades, seats and cross-sell. This is the engine that can push you past 100%.
- Read the verdict and actAbove 100% is net negative churn. If you are below it, the analysis flags whether churn or contraction is the bigger leak so you fix the right one first. Export the result for the retention review.
RGM Expert Says
Net negative churn is the line we watch most closely in any subscription business, because crossing it changes the entire growth equation. Below it, every new customer first has to refill what departures drained; above it, the existing base grows revenue on its own and new sales become pure acceleration rather than repair. We frame it for clients as the difference between bailing a boat and sailing one.
The discipline this tool enforces is separating contraction from churn. Teams tend to lump every dollar of lost revenue together, but a downgrade and a cancellation point to different problems — contraction is usually a value or pricing-fit issue with a customer who still wants to stay, while churn is an outright loss of the relationship. We always split them, because the cheapest path back to net negative churn is often fixing whichever one is quietly larger.
The reading we most want clients to internalize is that NRR above 100% earns the right to spend aggressively on acquisition. When the base compounds, a healthy LTV:CAC and a fast payback period are far easier to sustain, because the customers you buy keep getting more valuable. We treat net negative churn as the permission slip for scaling growth, not just a retention scorecard.
How it works
The indicator nets your two revenue forces against each other: expansion from existing customers against the revenue lost to contraction and full churn, all measured on the same starting base.
- Starting MRR — recurring revenue from the existing cohort at period start (the denominator).
- Expansion MRR — upgrades, seats and cross-sell added by existing customers.
- Contraction MRR — revenue lost to downgrades where the customer stayed.
- Churned MRR — revenue lost from customers who fully cancelled.
- Worked example: $100,000 start, +$12,000 expansion, −$3,000 contraction, −$5,000 churn → net +$4,000 and NRR 104.0% — net negative churn.
NRR excludes new-customer revenue by design — it measures only the existing base. The 100%-plus benchmark as the mark of healthy SaaS is widely discussed; see Bessemer’s cloud benchmarks. Targets here are rules of thumb, not guarantees.
Why net negative churn changes the growth math
Most companies fight churn to stand still. Net negative churn flips that: when expansion from existing customers outruns the revenue lost to downgrades and cancellations, the installed base grows revenue with no new sales at all. The mechanism is net revenue retention above 100%, and it is one of the few metrics that turns retention from a defensive cost into an offensive growth engine.
The reason the contraction-versus-churn split matters is that they demand different remedies. Churn is the loss of the whole relationship and usually points at onboarding, value realization, or fit; contraction is a customer who stays but pays less, which points at pricing tiers, usage, or a feature gap. Treat them as one number and you will aim the fix at the wrong leak.
Net negative churn also rewires acquisition economics. When the base compounds, the customers you buy keep getting more valuable, which lengthens lifetime value and shortens effective payback — so an NRR above 100% is what makes aggressive, profitable acquisition sustainable. It is the quiet engine behind the best subscription businesses, and the clearest reason retention work deserves a seat next to growth work.
Net revenue retention in context
NRR norms vary by segment — enterprise software tends higher than SMB or consumer subscriptions because expansion paths are richer. Treat any figure as orientation and track your own cohort trend.
| NRR | Read | Typical action |
|---|---|---|
| Below 90% | Significant net positive churn | Fix the larger leak before scaling |
| 90% to 100% | Net positive churn | Build an expansion motion |
| 100% to 110% | Net negative churn | Protect and study what expands |
| Above 110% | Strong compounding base | Scale acquisition with confidence |
What operators say about retention
Net negative churn is the closest thing in software to a perpetual-motion machine — the base grows even if sales stops for a quarter.
The economics of a subscription business live or die on retention; an expanding base is what makes acquisition spend pay back.