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Budget Assumptions Register
Prompt
Business and budget year: {{BUSINESS_AND_YEAR}}
Planned drivers (volumes, prices, headcount, rent, inflation view): {{DRIVERS}}
Prior-year actuals for reference: {{PRIOR_ACTUALS}}
Known decisions or contracts affecting the year: {{KNOWN_DECISIONS}}
Build a table with columns: assumption, value, source or evidence, owner, sensitivity (what happens to profit if wrong by a stated amount, with calculation), confidence (high, medium, low with reason), and review date.
Then list assumptions I appear to be missing for a business like this (for example, bad debts, payment terms, employer on-costs, foreign exchange, seasonality) as questions, not as values.
Rules: use only my figures. Where you need a number I haven't supplied, write "supply" rather than guessing. Make each sensitivity calculation visible, state any simplifying assumption, and remind me that tax and statutory rates must be taken from current official sources for my jurisdiction.
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About this prompt
“Budget Assumptions Register” is a free prompt for ChatGPT in the Business category, 155 words long, added to The Prompt Index on October 28, 2026 by The Prompt Index. Copy it with the button above, paste it into ChatGPT or any other AI chat assistant, and send it.
It has 4 placeholders to fill in first:
{{BUSINESS_AND_YEAR}}, {{DRIVERS}}, {{PRIOR_ACTUALS}}, {{KNOWN_DECISIONS}}.
Use the “Customize this prompt” fields to personalise it before you copy.
Recommended models: ChatGPT, Claude, Gemini.
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