Audit your AI
Review business logic and formula construction in your AI-created and edited models.
60 min call or screenshare
What I do
Two related services, depending on what you need:
Audit AI-built models, you used AI to build or modify a financial model. It looks right. You're not 100% sure it actually is. I review for hallucinated formulas, hard-coded values, broken integration, business logic that's plausible but wrong.
Build custom models, you need a model that fits your specific business or fund. I customize one of my templates (or build from scratch) for what you actually do. 50–100 engagements per year.
Often it's both, audit reveals what's broken, custom work fixes it.
What an audit covers
- Formula errors, wrong references, off-by-one summations, incorrect aggregations
- Hard-coded values, places where AI gave up and typed a number instead of computing one
- Business logic, does the model represent how your business actually works, or how AI guessed it works?
- Sheet integration, connections between sheets carrying the right values, no drops or duplications
- Edge cases, behavior at zero, negatives, extreme growth, currency boundaries
- Statement balance, for full models, does the balance sheet actually balance after AI's edits?
Output: written report with findings, severity, recommended fixes.
What custom work covers
- Custom revenue model, your business doesn't fit prebuilt revenue logic; I add what's needed
- Custom fund forecast, fund-specific structure, waterfalls, portfolio construction
- Cap table and exit waterfall, complex term sheets, multi-class structures, scenario modeling
- Bring-your-own-model integration, clean up, document, and restructure an existing model
- Post-audit fixes, implement what the audit found
Delivered as a working model with documentation. You own it forever.
How it works
- Contact me with what you need, model, business context, AI involvement
- I quote scope, timing, and price
- Work happens directly with me, no team, no handoffs
- For audits: written report. For custom: working model.
What it costs
- Audit: typical engagements are a few hundred to low thousands, depending on model size
- Custom: most projects $2K–$15K. Quoted after we talk.
Why this exists
AI is good at edits. AI is also good at producing plausible-looking output that's silently wrong. The "Built to edit" approach, start with a proven structure, edit with AI, works because the structure catches most errors. AI building from scratch doesn't have that scaffolding, and errors compound silently.
If you already went down the from-scratch path and you're about to use the model for a real decision (a raise, a board meeting, an LP commitment), get it audited first. If you need it built right from the start, custom work skips the audit step entirely.
Common questions
How long does an audit take?
A few days for most models.
How long does custom work take?
Depends on scope. Most projects are a few weeks.
Why not use AI to audit AI?
You can. I do too. But the failure modes, silently wrong but plausible, are exactly the ones AI is bad at catching, because they look correct to AI for the same reason they look correct to you.
Do you handle ongoing updates after a custom build?
For ongoing fund work, see Fractional CFO. For startups, contact me directly.