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Figure 4From “A flat rate buys your customer’s worst month.”

Two ratios, read off your own billing data

One row per key account or segment, from data you already hold. The first ratio is the buyer’s property; the second is the seller’s test of whether the theorem’s world is still yours.

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Figure 4Two ratios, read off your own billing data

A four-column worksheet with five rows: account or segment, peak-to-average usage, marginal cost per unit of usage, and the run-cost of metering, for pricing a flat component against the tail rather than the average.Account or segmentYour largest first.Peak-to-average usageBusiest month over ownaverage: 600/500 vs 900/500in the experiment.Marginal cost per unitWhat one more unit ofusage costs you to serve.Metering run-costRating, billing anddispute machinery, peryear.The first ratio is the one customer property shown to move the preference; the second decides whether absorbingthe variance is still nearly free. Price the flat component against the tail, not the average.

Source: Author's own worksheet.

PNG4:3, 1600 × 1200, with the title, the source line and the attribution set in the image isoglu-2026-a-flat-rate-buys-the-worst-month-fig04.png

From the essay

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APA 7

Isoglu, S. (2026). Two ratios, read off your own billing data [Figure]. isoglu.com. https://isoglu.com/insights/exhibits/isoglu-2026-a-flat-rate-buys-the-worst-month-fig04/

BibTeX
@misc{isoglu-2026-a-flat-rate-buys-the-worst-month-fig04,
  author = {Isoglu, Sinan},
  title = {{Two ratios, read off your own billing data}},
  year = {2026},
  howpublished = {Figure 4, isoglu.com},
  url = {https://isoglu.com/insights/exhibits/isoglu-2026-a-flat-rate-buys-the-worst-month-fig04/},
  note = {From the essay {A flat rate buys your customer’s worst month.}}
}
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  <a href="https://isoglu.com/insights/exhibits/isoglu-2026-a-flat-rate-buys-the-worst-month-fig04/">
    <img src="https://isoglu.com/social/isoglu-2026-a-flat-rate-buys-the-worst-month-fig04.png" alt="Figure 4: Two ratios, read off your own billing data" width="3200" height="2400">
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  <figcaption>Figure 4: Two ratios, read off your own billing data. Source: Author&#39;s own worksheet. <a href="https://isoglu.com/insights/exhibits/isoglu-2026-a-flat-rate-buys-the-worst-month-fig04/">View exhibit</a>.</figcaption>
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