Guide
Contribution Margin vs Gross Margin
Gross margin is useful, but it is not enough for operator decisions that depend on actual contribution profit.
What it means
Gross margin usually stops at revenue minus product cost. Contribution margin goes further. It asks what is left after the variable costs that move with the order, including fulfillment, payment fees, marketplace fees, returns allowance, and often ad spend.
Why it matters
Gross margin can look healthy while actual order economics are weak. That gap matters when you are approving discounts, setting CAC targets, or deciding whether a channel is worth scaling.
Simple formula
Contribution profit = net revenue - variable costs tied to the order.
Contribution margin = contribution profit / net revenue.
Common mistakes
- Treating gross margin as a proxy for profitability.
- Leaving out returns because they are not visible on every order.
- Ignoring payment and platform fees because they look small in isolation.
- Mixing warehouse rent or salaries into per-order contribution math.
Practical example
If a product sells for $70 with a 10% discount, your net revenue is $63. If COGS, freight, fulfillment, fees, returns allowance, and ads total $52, the order contributes $11. Gross margin alone would have overstated the economics.
Related tool
Use the contribution margin calculator to model the full per-order cost stack before setting pricing or acquisition targets.