How do I calculate contribution on an Amazon sale?
Subtract sourcing, selling fees, fulfillment and other variable expenses from net sales revenue.
Calculate Amazon selling costs and contribution per order
Revenue alone cannot show what a sale contributes. Enter the actual fees and variable costs for your product and distinguish contribution from final business profit.
What to inspect first
Take one real item and separate net revenue, sourcing, selling fees, fulfillment, shipping and ads. Contribution before fixed costs shows the room available for ads or discounts.
Practical example
With €40 net revenue, €15 sourcing cost, €10 platform and fulfillment charges and €3 other variable costs, contribution is €12 before ads and fixed overhead.
Six practical questions and answers
Which Amazon charges should I include?
Depending on the offer, referral, fulfillment, storage and other applicable charges may arise. Enter your actual figures.
Why is Amazon revenue high but profit low?
Fees, sourcing, returns or advertising may consume much of the contribution.
How do I set an Amazon selling price?
Account for all relevant costs and the minimum margin you need, then test the calculation with your actual fee basis.
How do I find break-even for Amazon Ads?
Calculate contribution before ads; that gives the maximum affordable ad cost under the entered assumptions.
How can I improve an Amazon product's margin?
Review sourcing, product mix, applicable charges, returns and pricing.
Frequently asked questions
Are fee rates updated automatically?
Only when a verified data source is connected; these tools otherwise use your inputs.
Can I include FBA costs?
Yes, enter them as cost items.
Is revenue the same as profit?
No.
Can the calculator show a loss?
Yes, when entered costs exceed the relevant revenue.
Are the calculators free?
Yes.
Check or calculate with your own inputs
Choose the tool that performs the specific task discussed on this page.
Marketplace Fee Calculator™Calculate contribution and margin using your own platform, payment and shipping costs.Open tool Margin & ROI Calculator™Separate contribution margin, cost markup and a return calculated from a stated net return.Open tool Break-even & Ad Cost Calculator™Calculate viable CPA, break-even ROAS and order volume from your costs.Open tool