Unit Economics

Unit economics looks at a business one customer, one order or one product at a time. Instead of asking whether the whole company is profitable today, it asks whether each new customer will eventually earn more than it costs to win and serve. This matters especially for young, fast growing companies, which often report losses because they spend heavily to acquire customers. If unit economics are strong, losses may be an investment in future profits; if they are weak, growth only makes losses bigger.

Key metrics#

The core formulas#

LTV ≈ (ARPU × gross margin) / churn rate
LTV to CAC ratio = LTV / CAC
payback period (months) = CAC / (monthly ARPU × gross margin)

Worked example#

Common benchmarks#

Benchmarks vary widely by industry and business model.

Cohort analysis#

Companies with strong unit economics often show cohort charts: groups of customers acquired in the same period, tracked over time. Healthy cohorts keep paying and often spend more; weak cohorts shrink quickly. Rising revenue can hide deteriorating cohorts if a company is spending ever more on acquisition.

Unit economics beyond software#

Warning signs#

• Rising CAC: competition for customers or saturated markets.
• Rising churn: weak product fit or better alternatives.
• "Contribution margin" definitions that exclude real costs.
• Growth driven by discounts that disappear when promotions end.
• Unit economics that only work at a scale never reached.

Unit economics and valuation#

Investors often value high growth companies on revenue multiples. Strong unit economics, high gross margins and high retention justify higher multiples because future revenue is more likely to become profit. See EV/EBITDA and EV/Sales.

Frequently asked questions#

What are unit economics?#

The revenues and costs associated with a single unit of a business, such as one customer or one order, used to judge whether growth creates value.

What is a good LTV to CAC ratio?#

A common benchmark is 3 or higher, meaning a customer is expected to generate at least three times the cost of acquiring them.

Why do unit economics matter for unprofitable companies?#

They show whether current losses are investments that will pay back over time or signs that each customer loses money.

Next, compare two approaches to markets in Technical vs Fundamental Analysis.