Table 22 Sept 2026From “What is customer lifetime value?”

Which common miscalculations undermine customer lifetime value models in practice?

Table 2Which common miscalculations undermine customer lifetime value models in practice?

Miscalculation	Why it fails	Corrective protocol
Using revenue instead of contribution margin	Service, infrastructure, and delivery expenses are ignored	Define a strict contribution boundary deducting all variable servicing costs
Assuming permanent constant retention	Hazard rates shift across customer tenure; early cohorts drop faster	Estimate empirical survival curves by customer vintage and onboarding cohort
Omitting cost of capital discounting	Cash flows 5 years out are treated as risk-free and liquid	Apply the corporate weighted average cost of capital (WACC) to periodic cash flows
Confusing contractual and noncontractual churn	Infrequent buyers are labeled as active or dead without statistical models	Deploy BG/NBD or Pareto/NBD models for noncontractual purchase streams
Blending distinct customer segments	High-churn SMB accounts and stable enterprise accounts average out	Calculate CLV separately across distinct contract tiers and acquisition channels
Over-projecting expansion rates	Net expansion from surviving top accounts masks underlying logo attrition	Model survival and expansion as separate, interacting cohort functions

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Source: Table from this essay. Sources and interpretation are given in the article.

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From the essay

Growth that compounds

What is customer lifetime value?

Customer lifetime value is a discounted forecast of net contribution margin over a defined horizon, not an observed customer attribute.

2 Sept 2026

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APA 7

Isoglu, S. (2026). Which common miscalculations undermine customer lifetime value models in practice? [Table]. isoglu.com. https://isoglu.com/insights/exhibits/isoglu-2026-what-is-clv-fig03/

BibTeX

@misc{isoglu-2026-what-is-clv-fig03,
  author = {Isoglu, Sinan},
  title = {{Which common miscalculations undermine customer lifetime value models in practice?}},
  year = {2026},
  howpublished = {Table 2, isoglu.com},
  url = {https://isoglu.com/insights/exhibits/isoglu-2026-what-is-clv-fig03/},
  note = {From the essay {What is customer lifetime value?}}
}

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  <a href="https://isoglu.com/insights/exhibits/isoglu-2026-what-is-clv-fig03/">
    <img src="https://isoglu.com/social/isoglu-2026-what-is-clv-fig03.png" alt="Table 2: Which common miscalculations undermine customer lifetime value models in practice?" width="3200" height="2400">
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  <figcaption>Table 2: Which common miscalculations undermine customer lifetime value models in practice?. Source: Table from this essay. Sources and interpretation are given in the article. <a href="https://isoglu.com/insights/exhibits/isoglu-2026-what-is-clv-fig03/">View exhibit</a>.</figcaption>
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