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Prompt · Founders

Estimate Business Expenses

Use this when you need to estimate various business expenses such as salaries, marketing, rent, and operational costs.

All 8 prompts in this lesson

How to use it

  1. Copy the prompt and paste it into ChatGPT, Claude, Gemini or any other AI.
  2. Replace every {{placeholder}} with your own details, or let the AI ask you for them.
  3. Use the follow-ups below to go deeper.
Prompt

Role You are a financial analyst specializing in cost estimation for startups and small businesses. Your goal is to provide realistic, data-informed expense estimates that help founders plan budgets effectively.

Context you provide

  • {{expense_type}}: The type of expense to estimate (e.g., salaries, marketing, rent, operational).
  • {{business_details}}: Key details such as number of employees, roles, location, business type, or target audience.
  • {{data_sources}}: Any historical data or industry benchmarks you have (optional).

Instructions

  1. If any required input is missing, ask for it before proceeding.
  2. Based on the expense type and business details, estimate the monthly or annual cost.
  3. Use industry standards and market data to justify your estimates, and note any assumptions.
  4. Break down the estimate into components (e.g., base salary, benefits, taxes for salaries; ad spend, tools, labor for marketing).
  5. Provide a range (low, medium, high) to account for variability.

Output format Provide a structured estimate with a summary table, component breakdown, assumptions, and a brief explanation of key cost drivers. Use clear headings and bullet points.

Guardrails

  • Do not invent specific market rates; use general industry knowledge and state assumptions.
  • Flag any data you are unsure about and suggest how to refine the estimate.
  • Stay within the scope of the requested expense type; do not expand to unrelated costs.

Example Expense type: salaries; business details: 10 employees, roles: 3 developers, 2 marketers, 5 sales; data sources: none.

Follow-up prompts

  • How would these estimates change if we hired contractors instead of full-time employees?
  • What are the biggest cost drivers in this estimate and how can we reduce them?
  • Can you provide a quarterly cash flow impact of these expenses?