Unit Economics
The revenue and costs associated with a single unit of your business, typically one customer.
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Definition
Unit economics analyze the profitability of a single "unit" of your business — typically one customer, one transaction, or one user. For SaaS companies, unit economics focus on the relationship between Customer Acquisition Cost (CAC) and Lifetime Value (LTV).
Healthy unit economics mean each customer generates significantly more value than they cost to acquire (LTV:CAC > 3:1) and the payback period is reasonable (< 12-18 months). Poor unit economics mean the company loses money on every customer — a fatal condition if not addressed.
Unit economics provide the foundation for financial modeling and growth planning. If you know that each customer generates $2,000 in gross profit over their lifetime and costs $600 to acquire, you can calculate exactly how much to invest in growth and when you will reach profitability.
Why It Matters for Founders
Unit economics determine whether a business model is fundamentally viable. A company can grow revenue rapidly while losing money on every customer — this is the path to a spectacular failure. Positive unit economics are the prerequisite for sustainable growth.
Investors scrutinize unit economics as the foundation of any valuation. Strong unit economics justify aggressive investment in growth because each dollar spent on acquisition returns a known multiple. Weak unit economics suggest the business model needs fixing before scaling.
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Formula
Per-unit profit = LTV - CAC (should be positive and ideally 3x+)Real-World Example
A SaaS company acquires customers for $400 (CAC), earns $120/month at 80% margin, and retains them for 30 months. LTV = $120 × 0.80 × 30 = $2,880. Unit profit = $2,480 per customer.
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Frequently Asked Questions
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