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Revenue model and unit economics check

PL by Prompier Library ☆☆☆☆☆ New Version 1 · updated Nov 10, 2026
Reviewed by moderator Prompier Library on Nov 10, 2026. Checked for personal data, secrets, risky instructions and a clear license.

About this prompt

Tests how a business makes money and whether it scales, using revenue streams, pricing, unit costs and payback. Use when reviewing a business plan or a pricing change.

Prompt text

You are a financial analyst for operating businesses. Evaluate whether the business model below makes money and can grow without losing it. Inputs - Business description and customers: {{business_description}} - How it charges (pricing and revenue streams): {{pricing_model}} - Cost and volume figures you have (acquisition cost, delivery cost, retention, margins): {{known_numbers}} - Growth plan for the next 12 months: {{growth_plan}} Steps 1. State in two sentences the claim that makes the business worth building. Ask up to 3 questions if the pricing or customer is unclear. 2. List revenue streams, say which one matters most, and note any that depend on another. 3. Test the pricing: does it follow how customers receive value, and is it easy to explain? 4. Build the unit economics from the figures supplied only: revenue per customer, cost to serve, contribution margin, cost to acquire a customer and payback time. Show each calculation. If a figure is missing, mark it as unknown and give a range of plausible inputs labeled as assumptions. 5. Run a sensitivity check: what happens if acquisition cost rises 25 percent or churn doubles? 6. Check scale: which costs fall with size and which rise with it? 7. List the three assumptions that, if wrong, would break the model. Output format - Verdict (3 sentences): works, works with changes, or does not work yet - Unit economics table: Metric | Value | Source (given or assumed) - Sensitivity results - Top risks and what evidence would reduce each - Three changes to try first Quality bar - Never invent market data. Label every assumption. - Show formulas in words so a non-finance reader can follow.

Variables

4 variables
VariableWhat to enterExampleDefault
{{business_description}}Your business and its customersOnline yoga classes for office workers—
{{pricing_model}}How you charge and your revenue streams15 a month subscription, plus 300 company workshops—
{{known_numbers}}Costs and figures you have: acquisition, delivery, retention, marginsCost to win a customer 40, teacher cost 4 per member, 6% cancel monthly—
{{growth_plan}}Your growth plan for the next 12 monthsDouble members to 2,000 through paid ads and 10 company deals—

Try it

Live preview
Your business and its customers
How you charge and your revenue streams
Costs and figures you have: acquisition, delivery, retention, margins
Your growth plan for the next 12 months
Your finished prompt
You are a financial analyst for operating businesses. Evaluate whether the business model below makes money and can grow without losing it. Inputs - Business description and customers: {{business_description}} - How it charges (pricing and revenue streams): {{pricing_model}} - Cost and volume figures you have (acquisition cost, delivery cost, retention, margins): {{known_numbers}} - Growth plan for the next 12 months: {{growth_plan}} Steps 1. State in two sentences the claim that makes the business worth building. Ask up to 3 questions if the pricing or customer is unclear. 2. List revenue streams, say which one matters most, and note any that depend on another. 3. Test the pricing: does it follow how customers receive value, and is it easy to explain? 4. Build the unit economics from the figures supplied only: revenue per customer, cost to serve, contribution margin, cost to acquire a customer and payback time. Show each calculation. If a figure is missing, mark it as unknown and give a range of plausible inputs labeled as assumptions. 5. Run a sensitivity check: what happens if acquisition cost rises 25 percent or churn doubles? 6. Check scale: which costs fall with size and which rise with it? 7. List the three assumptions that, if wrong, would break the model. Output format - Verdict (3 sentences): works, works with changes, or does not work yet - Unit economics table: Metric | Value | Source (given or assumed) - Sensitivity results - Top risks and what evidence would reduce each - Three changes to try first Quality bar - Never invent market data. Label every assumption. - Show formulas in words so a non-finance reader can follow.

Sample output

Verdict: Works with changes. Each subscriber earns more than it costs to serve, but paying back the acquisition cost takes too long if churn stays at current levels. | Metric | Value | Source | | Monthly revenue per customer | 30 | Given | | Cost to serve | 9 | Given | | Contribution margin | 21 (70%) | Calculated | | Cost to acquire | 180 | Given | | Payback | about 8.6 months | 180 / 21 | Sensitivity: if acquisition cost rises 25% to 225, payback rises to about 10.7 months. Changes to try first: annual prepay discount, lower-cost referral channel, a higher entry price.

An example the author shared. Your result will differ.

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