THE COMPANY-BUILDING FIELD NOTEBOOKRESEARCH EDITION / SEPTEMBER 2026
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READING PATHS / 03

What does growth leave behind?

Keep the cohort intact, include delivery costs and follow the cash. Worked examples make the assumptions available for inspection.

Conceptual editorial illustration for read the economics
Original AI-generated conceptual artwork · not documentary evidence

THE WORKING OUTPUT

A reconciled operating model—not one impressive metric.

The examples are invented arithmetic, not observed benchmarks, forecasts or personalized financial advice.

Open the decision tools ↗

A useful reading order

  1. Revenue Is Not Cash

    Understand how one annual subscription affects bookings, billings, cash, recognized revenue, and deferred revenue over time.

    3 min read
  2. Retention With the Cohort Intact

    Calculate and interpret retention for a fixed customer cohort without mixing in new-customer revenue.

    3 min read
  3. Acquisition Payback With Real Costs

    Measure customer acquisition payback using fully loaded cost, gross profit, and realistic timing.

    3 min read
  4. Cash, Inventory, and the Next Order

    Decide whether a physical-product business can fund its next purchase order after returns and operating cash needs.

    4 min read

Go back to the research

Read a primary-source record alongside it.