Why this matters
When an investor asks about your CAC and you hesitate or reach for notes, it can weaken confidence. Fluency with numbers helps investors judge whether you actually run the business or just present it. The deck (earlier in this checklist) shows the numbers; this step is about owning them.
What "done" looks like
- You can state revenue, growth rate, gross margin, CAC, burn, and runway promptly and accurately, without notes
- You know how each number is calculated and what it excludes
- You know which numbers are weak and have an honest answer ready
- Spoken numbers match the deck and data room exactly
How to do it
- Write a one-page metrics sheet: monthly revenue, growth rate, gross margin, CAC, LTV or payback period, burn, cash, runway.
- Recompute each one yourself from raw data once. You will find definition problems before an investor does.
- Learn the derivatives: if burn rises 20% or growth halves, what happens to runway? Investors probe with hypotheticals.
- Drill with a partner firing questions out of order until answers are reflexive.
- Reconcile deck, model, and memory the night before every pitch. Mismatches read as sloppiness or dishonesty.
Common mistakes
- Knowing the flattering numbers cold but stumbling on burn and runway, the ones investors care about most
- Quoting a blended CAC that hides how expensive paid acquisition really is
- Giving different numbers in the deck and in conversation because they were computed at different times
Real-world examples
- Televised pitch shows have made the failure mode famous: founders who cannot answer basic cost and margin questions lose the room, whatever the product
- DocSend's deck research shows investors linger on business model slides, exactly where unit economics questions come from
From a founder's point of view
Numbers fluency is not a memory trick; it is the natural byproduct of actually managing the company by its numbers. If recall takes effort, the problem is usually the dashboard, not the memorizing.
Rule of thumb
You should be able to answer questions about your burn and runway promptly and accurately. If you cannot, keep drilling.
