> ## Content Index > Fetch the complete content index at: https://abundance.alloconomy.com/llms.txt > Use this file to discover other available public pages before exploring further. # A Cost on Paper Is Not Always Money You Can Save - URL: https://abundance.alloconomy.com/alloconomy/abc-08-what-actually-changes/ - Published: 2026-10-09T14:07:50.000Z - Updated: 2026-10-29T20:21:37.000Z - Description: Dropping an activity does not cancel every bill assigned to it. A school-fair table and a software service show how to ask the right savings question. - Author: Sathya Narayanan - Tags: Alloconomy, Foundations, Activity-Based Costing, #series-detail Foundations · Mental model 8 ## Follow the work: ten simple ideas 1. Start here[The ten-idea cheat sheet](https://abundance.alloconomy.com/alloconomy/activity-based-costing/)A simple map of the work behind a price. 2. Idea 1[Costs follow work](https://abundance.alloconomy.com/alloconomy/abc-01-costs-follow-work/)Connect a customer promise to the tasks behind it. 3. Idea 2[Different levels of work](https://abundance.alloconomy.com/alloconomy/abc-02-different-levels/)Find what makes an activity repeat. 4. Idea 3[Averages hide differences](https://abundance.alloconomy.com/alloconomy/abc-03-averages-hide-differences/)Compare equal shares with actual use of shared work. 5. Idea 4[Choose a useful measure](https://abundance.alloconomy.com/alloconomy/abc-04-count-the-work/)Match the measure to the activity it explains. 6. Idea 5[Available and used capacity](https://abundance.alloconomy.com/alloconomy/abc-05-ready-and-used/)Separate available time from time used by customers. 7. Idea 6[Extra steps add up](https://abundance.alloconomy.com/alloconomy/abc-06-extra-steps/)Build a job from its ordinary steps and additions. 8. Idea 7[Follow the customer journey](https://abundance.alloconomy.com/alloconomy/abc-07-whole-customer-journey/)Look at the help before and after a sale. 9. Idea 8**Ask what actually changes**Current essayCompare the money that changes under a decision. 10. Idea 9[Use the time you free](https://abundance.alloconomy.com/alloconomy/abc-09-give-saved-time-a-job/)Turn faster work into a chosen benefit. 11. Idea 10[Keep the model useful](https://abundance.alloconomy.com/alloconomy/abc-10-keep-it-useful/)Measure enough to support the decision, then improve it. ## The table is already rented Maya rents a school-fair table for $40 for the day. She sells handmade cards and bookmarks. She assigns half the table cost, $20, to each activity in her notebook. Cards bring in $30 and use $10 of paper and envelopes. After assigning $20 of rent, the card activity appears to leave nothing. “Should I stop selling cards?” she asks. Mayan asks a different question: “Will stopping the cards change what you pay for the table today?” The answer is no. The $40 table booking is already committed for the day. [![STOP THE CARDS: Lose $30 of sales: Save $10 of materials; TABLE RENT: Still pay $40: Already committed for the day; RESULT: $20 less money left: $30 lost − $10 saved](https://storage.ghost.io/c/f5/a9/f5a9f801-5a10-44d6-b07c-6658660be1a9/content/images/2026/10/08-abc-08-what-actually-changes.png)](https://storage.ghost.io/c/f5/a9/f5a9f801-5a10-44d6-b07c-6658660be1a9/content/images/2026/10/08-abc-08-what-actually-changes.png?ref=abundance.alloconomy.com) A removed cost label does not cancel a bill. Numerical examples are illustrative; actual business economics require case-by-case analysis. [Open full-size infographic](https://storage.ghost.io/c/f5/a9/f5a9f801-5a10-44d6-b07c-6658660be1a9/content/images/2026/10/08-abc-08-what-actually-changes.png?ref=abundance.alloconomy.com). ## Compare the two choices If Maya sells the cards, she receives $30 and spends $10 on their materials. She has **$20 more** to help pay the table bill. If she stops the cards, she loses the $30 of sales and saves $10 of materials. The rent stays the same. She has **$20 less money left**. The assigned rent was useful for thinking about the whole stall. It was not a promise that $20 of rent would disappear if the cards did. The decision rule is simple: **compare the money and work that would actually change, over the period you care about**. ## Apply it to a SaaS feature Imagine a software business assigns part of its monthly support-team cost to a feature. Removing that feature may reduce support requests. But if the team's pay stays the same next month, the assignment does not become an immediate payroll saving. The released time may still be useful. The team could help other customers sooner. We examine that next. The first step is to describe the benefit accurately: less work or more available time, rather than an invented fall in a bill. If a separate supplier charge really ends when the feature ends, that is a different line in the decision. Follow the actual agreement and payment. ## Apply it to video services Imagine a streaming service deciding whether to remove a title. A cost assigned to that title in a report does not, by itself, say what payment would stop. The decision needs information about the relevant commitments, future receipts and work. We do not need to learn complicated contracts to understand the basic model. Ask two plain questions: “What would we stop paying?” and “What would we stop receiving?” A cost allocation alone answers neither. ## Try it A stall pays a fixed $50 daily rent. Selling badges brings in $25 and uses $8 of materials. If it stops badges while keeping the same stall, what changes? **Answer:** it loses $25, saves $8 and has $17 less left toward rent and other bills. **Carry this idea:** deleting a row in a cost report does not delete the bill behind it. ## Source [ACCA: Relevant costs](https://www.accaglobal.com/gb/en/student/exam-support-resources/fundamentals-exams-study-resources/f5/technical-articles/relevant-costs.html?ref=abundance.alloconomy.com) explains comparing future cash flows that change because of a decision. All figures above are illustrative. --- [← Follow the customer journey](https://abundance.alloconomy.com/alloconomy/abc-07-whole-customer-journey/) · [Use the time you free →](https://abundance.alloconomy.com/alloconomy/abc-09-give-saved-time-a-job/)