Table 120 Aug 2026From “Net revenue retention is a cohort definition”

The NRR formula with its boundaries restored

The percentage is the last step. The boundaries are the metric.

Table 1The NRR formula with its boundaries restored

Term	Include	Decide before calculating
Starting cohort	Customers eligible at the beginning of the window	Customer status, product scope and acquisition treatment
Starting revenue	Recurring revenue attributed to that cohort	Contracted, recognised, subscription, usage or total recurring basis
Churn	Revenue removed because the customer leaves	Full account, product, region and timing treatment
Contraction	Revenue lost while the customer remains	Downgrade, seat reduction, usage decline and price change
Expansion	Additional revenue from the starting cohort	Cross-sell, upsell, price increase and usage growth
Exclusions	Items intentionally left out	Acquisitions, currency, credits, services and one-time items

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Source: Author's operating worksheet, aligned with the disclosure and cohort-definition issues in the cited SEC guidance and public filing review.

PNG4:3, 1600 × 1200, with the title, the source line and the attribution set in the image isoglu-2026-net-revenue-retention-is-a-cohort-definition-fig03.png

From the essay

Revenue operations & AI

Net revenue retention is a cohort definition

Net revenue retention is a cohort definition before it is a growth metric. Fix the population, revenue boundary and time window before comparing it.

20 Aug 2026

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APA 7

Isoglu, S. (2026). The NRR formula with its boundaries restored [Table]. isoglu.com. https://isoglu.com/insights/exhibits/isoglu-2026-net-revenue-retention-is-a-cohort-definition-fig03/

BibTeX

@misc{isoglu-2026-net-revenue-retention-is-a-cohort-definition-fig03,
  author = {Isoglu, Sinan},
  title = {{The NRR formula with its boundaries restored}},
  year = {2026},
  howpublished = {Table 1, isoglu.com},
  url = {https://isoglu.com/insights/exhibits/isoglu-2026-net-revenue-retention-is-a-cohort-definition-fig03/},
  note = {From the essay {Net revenue retention is a cohort definition}}
}

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<figure>
  <a href="https://isoglu.com/insights/exhibits/isoglu-2026-net-revenue-retention-is-a-cohort-definition-fig03/">
    <img src="https://isoglu.com/social/isoglu-2026-net-revenue-retention-is-a-cohort-definition-fig03.png" alt="Table 1: The NRR formula with its boundaries restored" width="3200" height="2400">
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  <figcaption>Table 1: The NRR formula with its boundaries restored. Source: Author&#39;s operating worksheet, aligned with the disclosure and cohort-definition issues in the cited SEC guidance and public filing review. <a href="https://isoglu.com/insights/exhibits/isoglu-2026-net-revenue-retention-is-a-cohort-definition-fig03/">View exhibit</a>.</figcaption>
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