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Review a startup financial model

Stress-test a financial model's assumptions, formulas and scenarios before showing it to investors.

Claude FinanceRuleStack original

Written for Claude Opus 5.5 · Updated 2026-10-16

Note: Educational only, not financial or investment advice.

Note: Review and test before use. Provided as is, without warranty. See Terms.

Prompt

Review this financial model for a [stage] startup. <model>[paste key tabs or summary]</model>. Check: revenue assumptions vs. benchmarks, churn and CAC logic, hiring plan vs. revenue, cash runway, formula errors, and missing scenarios. List the 5 assumptions investors will challenge and how to defend or fix each. Produce a downside scenario.

Replace everything in [square brackets] with your own details.

Settings & parameters

claude-opus-5-5 with high effort; use the analysis tool for spreadsheet math

Variations

Board deck financial summary.

Tips

Disclaimer: not financial or investment advice; have an accountant review final numbers.

More: all Claude prompts · all finance prompts · prompt library

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