Annual Budget Assumptions Audit

Audit the assumptions behind an annual budget: growth, costs, timing and risks, with questions to test each one.

Added October 15, 2026. Written with AI assistance and checked for clarity and placeholders; not reviewed by a lawyer, accountant, clinician or other professional. How these prompts are made

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[ADD SOURCE] [VERIFY] is an editorial flag, not a blank to fill. Wherever the prompt shows [VERIFY], check that item against a reliable source before you use it (what [VERIFY] means).

Audit an annual budget. Budget lines with prior-year actuals and the assumptions listed: [BUDGET_AND_ASSUMPTIONS]. Strategic plans for the year: [PLANS]. Known risks: [RISKS].

Check whether assumptions are stated, whether they follow from plans and history, whether growth rates are consistent across lines, whether seasonality is reflected and whether contingencies are explicit. Highlight lines that depend on one uncertain event.

Return a table with Line, Assumption, Evidence, Strength (1 to 10) and Challenge, a sensitivity test of plus or minus ten percent on revenue and one cost line, and questions for budget owners. Mark estimates without sources [ADD SOURCE].

Also suggest which three assumptions to monitor monthly and the trigger for revising the budget if they move, so that the budget is a living tool.

Then create a budget governance calendar and a rolling forecast approach. Lay out the annual cycle: assumptions workshop, draft, challenge session, approval, monthly variance review, quarterly reforecast and year-end lessons. For each stage give the participants, the documents, the questions and the output. Provide an assumptions register template with owner, source, date, confidence and trigger for revision. Draft five challenge questions for each major budget line, such as what would have to be true for this to double, and what is the evidence for the current level. Suggest a policy for contingency use and a process for approving changes during the year. Add a monthly one-page report with the five numbers that matter and commentary prompts. Explain how to keep the budget as a tool for decisions and not a target to defend. This is education, not advice; financial and tax questions are [VERIFY] for [JURISDICTION].

State the assumptions behind each conclusion, mark which would change the result if wrong, and recommend that an accountant or other qualified person confirm the figures before they are filed or shared.

Conclude by ranking your recommendations by effort and by expected benefit in a small table, and mark any that depend on someone else's approval or budget.

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Assumption review (invented)
Revenue +12%: prior growth 5%, 7%, 6%. New product not yet launched. Strength 3. Challenge: what has to be true?
Staff costs +3%: pay rises already agreed at 4%. Strength 4. Error likely.
Marketing flat: two campaigns planned; strength 5.
Energy -8% after supplier switch: contract quote attached. Strength 8.
Contingency 1%: low for a new product. Suggest 5% on uncertain lines.
Sensitivity: revenue +/-10% changes profit by about 31,000 and cost line X by 4,500 (arithmetic in sheet).
Monthly watch list: revenue, staff costs, launch date. Mark estimates without sources [ADD SOURCE].

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