Contribution Margin

What Contribution Margin actually means

Contribution margin is the amount each sale contributes toward fixed costs and profit. Marketers often stop at gross margin and treat media as an operating expense. Counting variable marketing spend as a cost of the sale changes the picture entirely, because it exposes campaigns that generate revenue while destroying money. It is the metric that separates growth from motion.

Worked example

An order carries 120 dollars of revenue, 45 dollars of product cost, 12 dollars of shipping and payment fees, and cost 40 dollars in paid media to win. Contribution margin is 23 dollars. Push the media cost to 70 dollars for the same order and the sale now loses money while still counting as revenue growth in the weekly report.

Why the board cares

Boards have learned to distrust revenue growth that arrives with shrinking contribution margin, because it means the company is buying volume at a loss. Contribution margin per order or per customer is the honest scoreboard for a performance marketing program, and it is the number a CFO will raise the moment a marketer celebrates a top-line record.

Common mistakes

• Excluding paid media from the calculation, which makes every campaign look profitable.
• Applying a single blended margin across products with very different unit costs.
• Ignoring returns and refunds, which in some categories erase the entire margin on a cohort.

Related terms

• Customer Acquisition Cost (CAC)
• Return on Ad Spend (ROAS)
• Marketing Efficiency Ratio (MER)
• Average Revenue Per User (ARPU)

Back to the full marketing glossary