--- title: "Knowing When to Stop" description: "Set a stopping threshold before starting a venture. Review results and new evidence, compare future options without chasing sunk costs, and keep useful learning when a project ends." canonical: https://lightmysky.com/learn/life-skills/knowing-when-to-stop-mt_Xh61d76aET source: https://lightmysky.com/learn/life-skills/knowing-when-to-stop-mt_Xh61d76aET.md retrieved: 2026-11-12 --- > **Agent view.** This is the Markdown twin of the page, for tools and assistants. > When to use this site, and the call that answers each job: https://lightmysky.com/agent-instructions.md > API description (OpenAPI 3.1): https://lightmysky.com/openapi.json · Authentication: https://lightmysky.com/auth.md > Pricing: https://lightmysky.com/pricing.md · Catalog: https://lightmysky.com/llms.txt · Full catalog: https://lightmysky.com/llms-full.txt > Every machine-readable file on this domain: https://lightmysky.com/.well-known/ai-catalog.json > Ask for Markdown with `Accept: text/markdown`, a `.md` address, or `?mode=agent`. # Knowing When to Stop Set a stopping threshold before starting a venture. Review results and new evidence, compare future options without chasing sunk costs, and keep useful learning when a project ends. Subject: Life Skills · Area: Entrepreneurship · Ages 16 to 18 Page: https://lightmysky.com/learn/life-skills/knowing-when-to-stop-mt_Xh61d76aET ## Ready when they can - Write a measurable stopping threshold and review date before starting a venture - Explain why unrecoverable money and time already spent should not decide the next step, and why people may keep spending to justify them - Say what is worth keeping from a project that ends ## Lesson: Decide your stop rule before you start You have checked what each sale contributes. Now decide what evidence would make you stop the venture. A stop rule names a measurable result and a review date before you start, such as fewer than 15 paid orders after four weeks. Set a spending limit too. When a threshold is reached, review the result. Change the plan only for relevant new evidence, not to justify past spending. **Example.** Your stall's rule says to stop if next month is expected to lose more than £60 on costs that closing would avoid. Expected revenue is £240 and those costs are £320: an £80 loss. There are no other differences between the options. With no new evidence to change the forecast, the rule calls for stopping. A sunk cost is money or time already spent that cannot be recovered. A non-refundable fee and hours already worked are sunk. Paying more cannot undo them. People may keep spending to justify earlier effort. Compare future options instead. Equipment with resale value is different: the money you could recover by selling it belongs in the decision. For a short pause, compare revenue with all future costs that pausing avoids. These are avoidable costs. They can include a cancellable fixed fee as well as materials. Check payment terms; wages and rent do not always stop immediately. Include closing costs and obligations too. Costs payable under either option do not change which option loses less. This comparison does not prove the venture works long term. **Example.** Suppose a month's sales bring £400. Operating adds £250 in avoidable costs. Another £200 is payable whether you operate or pause, with no other costs or alternatives. Operating loses £50: £400 minus £450. Pausing loses £200. Operating reduces the loss by £150 for this month, although the venture has not covered all its costs. Opportunity cost is the value of the best alternative you give up. If you can take either a £40 shift or a £25 tutoring job during stall hours, the best paid alternative is £40, not £65. Rest, study and other goals can matter too. Compare realistic options for your time; covering cash costs alone does not make the stall your best choice. A closed project can leave useful records, skills, contacts and reusable tools. Record what customers did and what the numbers showed. Closing may free future time and cash, but bills can remain. Plan refunds, payments and communication with people affected. Responsible closing can help preserve trust; stopping alone does not guarantee your reputation. **Recap.** Set a clear stop rule, review new evidence, compare future options, and close responsibly when stopping is the better choice. *The revised lesson, questions and flashcards were written for this dataset. Supplied economics material informed the concepts; its prose and illustrations are not reproduced.* ## Practice 8 questions on this page, each with its working shown. ## Needs first - [Unit Economics: Does Each Sale Make Money?](https://lightmysky.com/learn/life-skills/unit-economics-does-each-sale-make-money-mt_NUoV6LB-o4) ## Optional connections - [Learning from Failure](https://lightmysky.com/learn/life-skills/learning-from-failure-mt_dknMcCqvoY) - [The Smallest Version Worth Testing](https://lightmysky.com/learn/life-skills/the-smallest-version-worth-testing-mt_q7e_4e7BoN)