Churn: why are your customers leaving?

Losing 5% of your customers per month sounds small. Let's do the math.

Start the year with 100 customers. 5% monthly churn. At the end of January: 95. In February: 90. In December: 54 customers. You've lost nearly half your base in 12 months.

Now add up the acquisition cost of everyone who left. And the revenue you lost. The math is brutal.

What churn is:

Cancellation rate — how many customers leave in a given period. It can be measured in number of customers (customer churn) or in revenue (revenue churn). Both matter, but revenue churn tends to be more revealing: losing 10 small customers is very different from losing 1 large one.

How to calculate:

Monthly churn = (customers who left in the month / customers at the start of the month) × 100.

If you started with 200 and 12 cancelled: churn = 6%.

Why your customers are leaving:

The most common reasons I've seen over the years are:

1. 1Expectation vs. reality. What was promised during the sale didn't match the experience. The customer felt misled.
2. 2Lack of perceived results. The customer doesn't see value in what they pay for. Not because value doesn't exist — but because nobody showed them.
3. 3Weak support. Slow response times, difficulty getting problems resolved, the feeling of not mattering.
4. 4Better competitor. Someone made a more attractive offer. This happens when your service's differentiator isn't clear.
5. 5Changed needs. The customer simply doesn't need it anymore. This is the least controllable reason — and usually the least frequent.

What to do:

Before any action, measure. If you don't know your churn rate, you don't know whether you're improving or getting worse.

Then talk to the customers who left. Not to convince them to come back — but to understand why. The real answer (not the polite one) is the most valuable input you'll ever get.

And invest in the beginning: onboarding. The first 30 days are when the customer decides — even if unconsciously — whether they'll stay or not. If the initial experience is good, retention odds go up. If it's confusing or disappointing, cancellation is just a matter of time.

Silent churn is the bleeding that doesn't show up in revenue — until it shows up in your cash flow.

What's yours? The Painel de KPIs calculates churn, retention, and 16 more indicators. No sign-up required.