Glossary
Unit economics
The direct revenue and costs attributable to a single unit, such as one customer or one transaction.
Unit economics looks at profitability one unit at a time, most often one customer, rather than at the company's aggregate income statement. The "unit" is defined by the business model: a subscriber for a SaaS company, a ride for a rideshare company, an order for an e-commerce retailer. For each unit, the analysis lines up the revenue it generates against the direct costs of serving it.
The core comparison is typically customer lifetime value against acquisition cost, summarized in the LTV:CAC ratio, alongside the contribution margin each unit produces after variable costs. Unit economics differs from company-wide gross margin because it isolates whether the underlying model works at all, independent of scale, fixed overhead, or shared costs that a top-level margin figure blends together.
Unit economics matters because a company can grow revenue quickly while losing money on every unit it sells, a pattern that aggregate growth metrics can mask for a long time. Investors and operators use it to judge whether growth is building a sustainable business or simply buying revenue at a loss. The common pitfall is defining "cost per unit" inconsistently between periods, or excluding real costs like support and onboarding, which makes unit economics look healthier than the business actually is.
Last reviewed September 22, 2026