Investors are underwriting upside, not repayment: a market large enough to matter, economics that improve with scale, a team that can execute, and an ask tied to the milestones it buys.
A deck opens the conversation; the written plan survives it. Once a partner is interested, diligence questions about market derivation, retention and month-by-month use of funds are answered in a document, not on a slide.
The sections that earn a second meeting are the ones whose claims are derivable: TAM/SAM/SOM with the derivation shown, unit economics with CAC, contribution margin and payback, traction you can evidence, a go-to-market sequence, the competitive wedge, and the team the round funds.
Red flags end diligence early: a market size with no derivation, revenue tripling while costs stay flat, a narrative growth rate the spreadsheet does not produce, implied traction, and an ask with no use of funds or milestones.
Pre-revenue does not mean no model. It means a bottom-up revenue build stating its assumptions, monthly cash flow for the first 12 to 18 months, burn, runway, and a break-even point a reader can argue with.