Unit economics is the term every investor uses and most founders misunderstand. It's not a ratio you calculate once and file away—it's the early warning system for whether your business model works at scale. This episode walks through the unit economics that matter for different business models: CAC and LTV for SaaS, take rate and repeat rate for marketplaces, gross margin and payback period for hardware. But here's where operators get stuck: the math is easy; the judgment calls are brutal. We explore the real debates: Should you include sales commissions in CAC? What payback period is actually acceptable? How do you model LTV when you don't have three years of cohort data yet? You'll hear from founders who watched unit economics deteriorate as they scaled (a viral growth story that looked great until customer acquisition costs tripled), and from those who fixed them mid-flight (a marketplace that restructured its take rate and unlocked unit economics that attracted serious capital). The strategic angle: your board will ask about unit economics before they ask about revenue, because unit economics tell them whether you're building a business or a monument to growth-at-any-cost.