unit economics

Unit Economics

The revenue and costs associated with a single customer or unit of a product, used to judge whether the business model works at scale.

When you'd see it: Investor diligence, board reviews, any "are we actually a business" conversation. The classic framing: how much does it cost to acquire a customer (CAC), and how much will that customer pay us over time (LTV)? If LTV beats CAC by enough margin, the unit economics work; if not, scaling the business just scales the losses.

Why it matters: Unit economics decide whether growth makes you stronger or kills you faster. A company can hide bad economics with cheap capital for years, but eventually the math has to work per customer. The rule of thumb investors quote: LTV should be at least 3x CAC, with payback under 12 months.

Common mistakes: Treating unit economics as a single number. The honest calculation depends on cohort behavior over time, not snapshot averages, and it shifts as the customer mix changes. Also: counting only direct acquisition costs while ignoring the overhead it takes to deliver the product — clean unit economics include the cost to serve, not just to sell.

Related CAC, LTV, MRR