Glossary
Contribution Margin
Contribution margin is revenue minus all variable costs — cost of goods sold, Amazon referral fees, FBA fulfillment fees, shipping, and advertising. It is the real profit figure for Amazon sellers because it accounts for the costs that actually vary with sales. Two products with identical gross margins can have wildly different contribution margins depending on fee structure and ad spend.
Why it matters for Amazon sellers
Revenue means nothing if you are losing money on every sale. Contribution margin strips away the vanity metrics and shows what is actually left after Amazon has taken its cut. It is the only metric that tells you whether a specific product, or the whole account, is actually profitable. Most Amazon sellers optimize for revenue growth or ACoS targets when they should optimize for contribution margin. That mismatch is why accounts with growing top-line sales can still be quietly losing money on 20 percent of their catalog. AI-driven pricing and bidding only work well when the AI can see contribution margin per SKU. Without that, an AI pricing agent will race to match competitors on products that cannot absorb the price cut, and an AI bid agent will scale spend on ASINs where the last-click sale never cleared COGS plus fees. Feeding real margin data into every decision is what separates intelligent automation from expensive rule-following.
How Profasee handles this
Every decision Oracle and Marko make is anchored to live contribution margin per SKU. Price changes, bid adjustments, budget reallocations, and inventory-aware pauses all route through the same margin signal. That means Ultra optimizes for the profit number that actually matters — not revenue growth that hides margin erosion or ACoS targets that ignore fee reality.
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Frequently asked questions
What is contribution margin for Amazon sellers?
Contribution margin is revenue minus all variable costs: cost of goods sold, Amazon referral and FBA fees, shipping, and advertising spend. It shows the actual profit each product (or the account) generates before fixed overhead.
Why is contribution margin better than gross margin?
Gross margin only subtracts COGS from revenue. Contribution margin also accounts for Amazon fees, shipping, and ad spend — the costs that actually determine whether an Amazon product is profitable. Two products can have identical gross margins but wildly different contribution margins.
How do I calculate contribution margin on Amazon?
Revenue minus COGS minus Amazon referral fee (usually 8-15% depending on category) minus FBA fulfillment fee minus shipping minus ad spend attributed to that product. Do this per SKU. Accurate contribution margin requires up-to-date COGS and fee data, which many sellers underestimate by not including return reserves or storage fees.
Related terms
Dynamic Pricing
Dynamic pricing is the practice of adjusting product prices automatically in response to real-time s...
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Machine Learning Pricing
Machine learning pricing is the use of statistical models that learn from historical sales, competit...
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Amazon FBA
Amazon FBA (Fulfillment by Amazon) is Amazon's third-party logistics service. Sellers ship inventory...
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