How to Calculate Your True Amazon Profit Margin?
Your true profit margin on Amazon is what remains of the selling price after every cost is paid, divided by that price. The trap is that many of those costs are hidden fees that only appear on your settlement report: the referral fee is taken as a percentage of the whole sale, the fulfillment cost is charged per unit, and storage, returns and advertising quietly add up. A margin calculated from the product cost alone is almost always too optimistic.
Work it out in three steps:
- Landed cost per unit. Product cost, plus freight and duties to get it into Amazon's warehouse, plus packaging and prep.
- Amazon fees per unit. The FBA fulfillment fee for your size tier, the referral fee (most categories charge 15% with a $0.30 minimum) and, on the Individual plan, the per-item fee.
- Net profit. Selling price minus fees minus landed cost minus advertising and returns. Divide net profit by the selling price to get your margin.
Because the referral fee grows with your price, raising the price by one dollar does not add one dollar of profit. That is why this calculator solves for the price directly instead of adding a markup to your cost.
Illustrative inputs, not a quote from any platform. Calculated with the same engine as the calculator above.
- Product cost
- $8.00
- Inbound freight
- $0.60
- FBA fulfillment fee
- $3.80
- Referral fee
- 15% (min. $0.30)
- Target margin
- 20%
| List price | $19.08 |
| Customer pays (incl. tax) | $19.08 |
| Indirect tax collected for authorities VAT / GST / sales tax — not seller revenue | $0.00 |
| Net revenue | $19.08 |
| Referral fee Marketplace / referral · 15% of order total excl. tax (19.08); min 0.30 | −$2.86 |
| FBA fulfillment fee per unit Marketplace fulfillment · fixed per order | −$3.80 |
| Product cost 8.00 USD per unit | −$8.00 |
| Inbound freight & duties 0.60 USD per unit | −$0.60 |
| Contribution profit Contribution margin 20.01% | $3.82 |
| Profit after allocated overhead | $3.82 |
| Margin | 20.01% |
| Markup on total cost | 25.02% |
What this calculator does not know
Amazon's fees depend on your category, size tier, marketplace and the date, and they change. The “Load typical US fees” button fills in only the common 15% referral rate and links to Amazon's fee page; check your own category and your fulfillment fee before relying on the result. Storage fees, low-inventory surcharges and returns processing vary month to month, so treat them as an allowance per unit.
Selling against other offers? Use the competitor price comparison to see what matching each competitor would leave you.