Full Definition
Unit economics refers to the direct revenues and costs associated with a single "unit" of a business — typically a customer or a transaction. Positive unit economics indicate that each additional customer generates more revenue than they cost to acquire and serve.
Key Unit Economics Metrics
- CAC (Customer Acquisition Cost): Total cost to acquire a new customer
- LTV (Customer Lifetime Value): Total revenue expected from a customer over their lifetime
- LTV:CAC Ratio: Should be 3:1 or higher for a healthy SaaS business
- CAC Payback Period: Months to recover the acquisition cost (ideally <12 months)
- Gross Margin: Revenue minus cost of goods sold, per customer
Why Unit Economics Matter
Investors scrutinize unit economics to ensure a startup's growth is sustainable and profitable on a per-customer basis. Negative unit economics (spending more to acquire customers than they generate) is a red flag unless there's a clear path to improvement.
Real-World Example
A subscription box company with $50 CAC, $15 monthly margin, and 12-month average customer lifetime has LTV of $180 and an LTV:CAC ratio of 3.6:1.
Related Terms
The total cost of acquiring a new customer, including marketing, sales, and related expenses.
The total revenue a business can expect from a single customer throughout their entire relationship.
The rate at which a startup spends its cash reserves, typically measured monthly.
The strategy a company uses to generate income from its product or service.
The stage where a product satisfies strong market demand, indicated by rapid organic growth.
Investor Outreach Template Pack
Get our proven email templates, pitch frameworks, and investor research guides — used by 1,000+ founders.
- Cold email templates that get 40%+ open rates
- Follow-up sequence frameworks
- Investor research checklist