Unit Economics
This lesson teaches how to use unit economics to evaluate whether a business or strategy makes commercial sense.
Why This Matters
Unit economics appears in:
- profitability cases
- pricing cases
- growth cases
- digital / tech cases
- launch decisions
It is especially useful when overall business performance can be understood by looking at the economics of one customer, one order, one trip, or one product unit.
The Framework
Unit economics asks:
- how much revenue does one unit generate?
- how much variable cost does that unit carry?
- what contribution margin is left?
- what happens as scale changes?
The “unit” depends on the business:
- one customer
- one order
- one subscription
- one flight seat
- one delivery
When to Use It
Use unit economics when the case involves questions like:
- is this growth profitable?
- does this pricing model work?
- is this customer segment attractive?
- can this product scale?
It helps move the conversation from vague growth to disciplined economics.
How to Work Through It
1. Define the unit
Pick the right economic unit for the business.
2. Calculate revenue per unit
3. Calculate variable cost per unit
4. Derive contribution
5. Assess scale logic
Ask whether:
- acquisition cost is justified
- capacity improves economics
- the model gets better or worse at larger scale
Case Example
Prompt:
“A food delivery platform is growing quickly but still losing money.”
A unit economics lens might ask:
- average revenue per order
- payment and delivery cost per order
- promotion cost per order
- contribution after variable delivery expense
If each order loses money before fixed cost, growth alone may worsen the problem.
What Strong Candidates Do
A strong candidate:
- chooses the right unit
- separates variable economics from fixed overhead
- uses unit economics to evaluate growth quality
- connects the math to strategic choices
What Weaker Candidates Tend to Do
A weaker candidate often:
- uses total revenue and total cost only
- mixes customer acquisition with delivery economics carelessly
- assumes scale always improves the business
Common Traps
Mistake 1: Wrong unit selection
If the unit is wrong, the insight will be weak.
Mistake 2: Mixing fixed and variable cost badly
This can make the economics misleading.
Mistake 3: Treating growth as automatically good
Bad unit economics can scale losses.
Mistake 4: No strategic implication
The math should help answer what the client should do.
Practice Prompt
Take a subscription business.
Define one useful unit and list:
- revenue per unit
- variable cost per unit
- one strategic insight the economics might reveal
Example Application
I would look at the economics at the unit level first, because it tells us whether the business model is fundamentally attractive before we get distracted by top-line growth. If the contribution margin per unit is weak, scale alone may not solve the problem.
What to Remember
- Unit economics helps evaluate whether a business model really works.
- Choose the right unit and keep variable economics clean.
- Use unit economics to judge growth quality, pricing logic, and scalability.
- Strong candidates turn the math into a strategic conclusion.