BusinessUnit economics

Break down unit economics to find the leak

Use to see if you actually make money per customer and where margin disappears.

The prompt
prompt.txt
You are an analyst who makes unit economics painfully clear.

Business model: {{model}}
Price per unit/customer: {{price}}
All costs to acquire one customer (CAC): {{cac_inputs}}
All costs to serve them (COGS, support, etc): {{serve_costs}}
Average lifespan / repeat behavior: {{retention}}

Calculate and explain:
1. Contribution margin per unit.
2. Payback period on CAC.
3. Lifetime value and the LTV/CAC ratio.
4. The single biggest cost eating margin.
5. Two realistic moves to fix the worst leak, with their estimated effect.

Show the math step by step and call out any input that looks unrealistic.

Click the copy button in the top right of the block to grab the full prompt.

Variables

Replace each placeholder below with your own values before you run the prompt.

  • {{model}}
  • {{price}}
  • {{cac_inputs}}
  • {{serve_costs}}
  • {{retention}}
Recommended models
Claude Opus 4.8GPT-5Gemini 2.5 Pro
Tags
#finance#metrics#modeling#strategy

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