Shafaat Choyon.

Churn and retention calculator

How many customers are you losing, and what does it cost you? See your monthly churn rate, how many of today’s customers you will still have in a year, the average customer lifetime and the revenue churn takes every month. Load an example from 15 industries, nine of them where I have worked.

Built from my own work: Digitizing a multi-entity clinical group

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Monthly churn-
Still here in a year-
Average lifetime-
Revenue lost a month-

FormulaMonthly churn = customers lost ÷ customers at the start · average lifetime ≈ 1 ÷ churn · still here after 12 months = (1 − churn)12

What to do next

    Show the working, step by step

      Where I used this

      At Laser Treat I brought patient records and customer experience systems onto one platform across the group, and patient retention rose 13%.

      Read the case: Digitizing a multi-entity clinical group →

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      Where churn usually comes from

      • The first weeks. Customers who never get the first result they came for leave early. Look at churn by joining month, not only in total.
      • Service failures. A missed delivery, a long queue or an unanswered complaint. These show up in support logs before they show up in churn.
      • Value for money. When the price rises or a cheaper option appears. Ask the customers who leave, and check your price increase math first.

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      Losing customers faster than you win them?

      Bring your numbers to a free 30-minute call, and I will help you find where customers leave and what to fix first.

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      Questions

      How do you calculate churn rate?

      Divide the customers lost during a period by the customers you had at the start of it. Losing 100 of 2,000 customers in a month is a 5% monthly churn rate.

      What is the difference between customer churn and revenue churn?

      Customer churn counts people; revenue churn counts money. Losing a few large accounts can mean low customer churn but high revenue churn, so track both.

      How does churn affect customer lifetime value?

      The average customer lifetime is roughly 1 divided by monthly churn. Halving churn roughly doubles how long a customer stays, and the lifetime value with it.

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