# Unit Economics

> Unit economics measures profit per customer or unit sold. Learn lifetime value, acquisition cost, payback period, churn and how investors use these metrics.

Source: https://learn.tradelabsai.com/fundamentals/unit-economics/  
Track: Fundamental Analysis · Level: Intermediate · Updated: 2026-10-03  
Publisher: TradeLabs AI (https://tradelabsai.com). Education, not financial advice.  
Cite as: TradeLabs Learn, "Unit Economics", https://learn.tradelabsai.com/fundamentals/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

| Metric | Meaning |
|---|---|
| Customer acquisition cost (CAC) | Sales and marketing spend to win one new customer |
| Average revenue per user (ARPU) | Revenue per customer per period |
| Gross margin per customer | Revenue per customer minus direct costs of serving them |
| Churn rate | Share of customers lost per period |
| Customer lifetime value (LTV) | Total gross profit expected from a customer over their life |
| Payback period | Time to recover CAC from gross profit |

## 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

**Example: A subscription business**
A software company charges $50 a month, with an 80% gross margin, so each customer contributes $40 a month in gross profit. Monthly churn is 2%, implying an average customer life of about 50 months. It spends $600 in marketing to acquire each customer.

- LTV ≈ 40 / 0.02 = $2,000
- LTV to CAC = 2,000 / 600 ≈ 3.3
- Payback = 600 / 40 = 15 months

These are healthy numbers by common software benchmarks (LTV to CAC above 3, payback under 18 to 24 months). If churn rose to 5%, LTV would fall to $800 and LTV to CAC to about 1.3, making growth far less valuable.

## Common benchmarks

| Metric | Often cited healthy range |
|---|---|
| LTV to CAC | 3 or higher |
| CAC payback | Under 12 to 24 months, depending on the business |
| Net revenue retention (software) | Above 100%, meaning existing customers expand spending |
| Gross margin (software) | Above 70% |

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

| Business | Unit | Key metrics |
|---|---|---|
| E commerce | Order | Average order value, contribution margin after shipping and returns |
| Ride sharing and delivery | Trip or order | Take rate, contribution per trip |
| Restaurants and retail | Store | Sales per store, payback on new store investment |
| Telecoms | Subscriber | ARPU, churn, cost to connect |

## 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](https://learn.tradelabsai.com/fundamentals/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](https://learn.tradelabsai.com/fundamentals/technical-vs-fundamental/).

## Continue learning

- Next lesson: [Technical vs Fundamental Analysis](https://learn.tradelabsai.com/fundamentals/technical-vs-fundamental/)
- Previous lesson: [Competitive Advantage and Moats](https://learn.tradelabsai.com/fundamentals/competitive-advantage-and-moats/)
- Related: [Competitive Advantage and Moats](https://learn.tradelabsai.com/fundamentals/competitive-advantage-and-moats/): An economic moat is a durable advantage that protects a company's profits from rivals. Learn the main sources, how to spot them in the numbers and how they erode.
- Related: [Revenue and Gross Profit](https://learn.tradelabsai.com/fundamentals/revenue-and-gross-profit/): Revenue is what a company sells; gross profit is what remains after direct costs. Learn revenue recognition, growth metrics, gross margin and what they reveal.
- Related: [Revenue Growth and Margin Analysis](https://learn.tradelabsai.com/fundamentals/margin-analysis/): Profit margins show how much of each dollar of sales a company keeps. Learn gross, operating, EBITDA and net margins, how to analyse trends and what drives them.
- Related: [EV/EBITDA and EV/Sales](https://learn.tradelabsai.com/fundamentals/ev-ebitda-and-ev-sales/): EV/EBITDA and EV/Sales compare a company's total value, including debt, with its earnings or revenue. Learn how to calculate EV, when to use each and the limits.
- Related: [Earnings Quality and Cash Conversion](https://learn.tradelabsai.com/fundamentals/earnings-quality/): Earnings quality asks whether reported profits are real, repeatable and backed by cash. Learn accruals, warning signs, the Beneish model and famous frauds.