Contribution Margin

Metric

Contribution margin is revenue remaining after deducting all variable costs associated with producing, packaging, shipping, and processing an order.

Layman Explanation & Analogy

When an item sells, money immediately leaves your pocket for the product cost (COGS), shipping postage, packing boxes, and credit card swipe fees (2.9%). What is left over is your Contribution Margin — the exact money available to pay for advertising and business overhead.

Mathematical Formula

Contribution Margin = Revenue − Variable Direct Costs

Worked real-world example

A customer buys sneakers for $100. Product cost is $40, shipping is $10, and payment fees are $3. Contribution margin is $100 − $53 = $47 (47%).

What people get wrong & common traps

Many marketers mistakenly optimize ads against Gross Margin instead of Contribution Margin, forgetting that shipping, warehousing pick-and-pack, and gateway fees eat directly into ad profitability.

Related terms