A single-digit number that looks harmless. Five percent cancellations a month is almost nothing up close. Except that over twelve months those 5 percent take nearly half your customers, and you have to run faster and faster just to stay in place.
It is the most underestimated metric in the subscription model, precisely because its effect is invisible month by month.
Definition
Churn is the share of customers or revenue lost over a period. It is measured two ways that do not say the same thing:
- Customer churn counts departures, whatever they were worth.
- Revenue churn counts the euros lost.
The gap between them is instructive. Customer churn of 8 percent with revenue churn of 2 percent means you are mostly losing small accounts, which is almost good news. The reverse is a serious alarm.
The compounding nobody anticipates
A large share of your acquisition already goes to replacing leavers.
Compounding is the surprise: the rate does not add up, it compounds. Five percent a month is not 60 percent over the year but roughly 46.
Move the rate above and watch how long it takes for half your customers to disappear. Going from 3 to 6 percent does not halve the result in month one: it does so after a year, and that lag is what makes churn so dangerous to watch from too far away.
A simple benchmark: average customer lifetime is the inverse of monthly churn. At 5 percent it is twenty months. At 10 percent it drops to ten. That duration feeds directly into the LTV (customer lifetime value) calculation.
Where it actually comes from
| Cause | When it hits | What addresses it |
|---|---|---|
| The customer never got started | First month | Onboarding |
| Value no longer perceived | Months 3 to 6 | Surfacing real usage |
| The need disappeared | Variable | Nothing, and that is healthy |
| The card expired | Random | Dunning |
The last row is the forgotten one, and the easiest to fix. A meaningful share of cancellations is not a customer decision but a failed payment, and a recovery sequence wins a good part of it back.
Frequently asked questions
What churn rate is acceptable?
It depends entirely on price and audience. A €10 consumer product lives fine on 5 to 7 percent monthly. A €200 professional product should aim below 2 percent, or LTV (customer lifetime value) stops covering CAC (customer acquisition cost).
How do I actually reduce it?
At the beginning, nearly always. Most churn is decided in the first thirty days, while the customer has not yet reached a first result. Onboarding does more for Retention than any feature added later.
Should I aim for zero churn?
No, and chasing it wastes time. Some departures are healthy: the need went away, the company closed, the project ended. Focus on avoidable departures, identifiable through a single question asked at cancellation.
Can I derive annual churn from monthly?
Not by multiplying by twelve, which overstates badly. You have to compound: 5 percent monthly gives roughly 46 percent annually, not 60. The error is common and distorts every projection built on it.