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Startups & Business › Metrics & Unit Economics

Unit Economics

Revenue and cost per customer or per order, which shows whether growth makes or loses money.

Tech Entrepreneur · Product-Market Fit · core

Also known as: unit economics, unit profitable, per-unit economics

Unit economics reduce the business to one customer (or order): what they bring in, what they cost to serve and acquire, and what remains. Positive units mean growth creates value and scale heals; negative units mean growth accelerates losses — more revenue, faster death. Every sustainable company is unit-profitable (or has a dated, funded path there); every failed scaler was not.

per customer:  lifetime value − acquisition cost − serve cost = unit profit
healthy:       unit profit > 0 with margin to absorb shocks
sick:          growth celebrated while each unit loses money

Compute it honestly: fully-loaded serve costs (support, infra, refunds, overhead share), true acquisition cost (fully-loaded sales and marketing), and lifetime value on retained cohorts, not blended averages that hide churn.

The classic mistakes:

  • Blended averages hiding segments. Profitable enterprise plus bleeding SMB averages to “fine” while both need opposite actions. Unit economics per segment or it misleads.
  • Ignoring fully-loaded costs. Support salaries, infra, refunds and overhead excluded to flatter the math. The discovered version (in diligence) kills trust along with the thesis.
  • Growth justifying negative units indefinitely. “We’ll fix economics at scale” without a mechanism (which costs actually fall with volume?). Scale improves some costs; name which, with evidence, or stop claiming it.
  • One-time economics presented as steady-state. Launch promos, founder-led sales and early-adopter love flatter early units. Project economics at scale motion, not concierge motion.
  • Confusing contribution with net. Positive contribution margin per sale with fixed costs uncovered is progress, not health. Units must eventually cover their share of everything.

The gate: no scaling spend until units work on honest math. Growth multiplies whatever the unit earns — make sure it earns. See LTV:CAC for the ratio version and default alive for the company-level verdict.