Keywords · Finance · Updated 2026-07-21

What is Contribution Margin?

Short answer: Revenue minus all variable costs associated with a customer or unit, showing how much each additional sale contributes toward fixed costs and profit.

Definition

Revenue minus all variable costs associated with a customer or unit, showing how much each additional sale contributes toward fixed costs and profit.

Why it matters for growth

Contribution margin reveals true per-unit profitability, which is essential before deciding how aggressively to scale acquisition spend.

Example

A marketplace calculates that after payment processing and support costs, each transaction contributes $4 toward covering fixed costs.

FAQ

What is Contribution Margin?
Revenue minus all variable costs associated with a customer or unit, showing how much each additional sale contributes toward fixed costs and profit.
Why does Contribution Margin matter for growth?
Contribution margin reveals true per-unit profitability, which is essential before deciding how aggressively to scale acquisition spend.
What is an example of Contribution Margin?
A marketplace calculates that after payment processing and support costs, each transaction contributes $4 toward covering fixed costs.
What is Contribution Margin? Definition and growth use · Cofounderbase