Amazon FBA Profit Margin: How to Calculate Profit, Margin and ROI
Revenue is not profit. This guide shows which Amazon fees and costs of goods to deduct, how to calculate profit, profit margin and ROI with an FBA example, what changes with FBM, why many calculations overstate profit and how to track profit per product.
A product with high sales can still lose money. Between the price a customer pays and the profit you keep are cost of goods, Amazon fees, advertising, returns and your own overhead. Your Amazon profit margin shows how much of each dollar of revenue remains after all of these costs.
This guide shows which costs to deduct, how FBA and FBM differ, why you have to maintain your cost of goods yourself, how to calculate profit, profit margin and ROI with an FBA example, what Amazon's own calculators leave out and how to track profit per product.
As of: Amazon's seller pricing pages and Seller Central help for the US and Germany (checked in October 2026).
Which costs reduce your Amazon profit?
Cost of goods sold (COGS): what one sold unit costs you, including freight, duties and inbound shipping to Amazon. Amazon does not know your COGS; the next section shows what to watch.
Selling plan fee: the Professional plan costs $39.99 per month in the US; the Individual plan has no monthly fee but $0.99 per item sold.
Referral fee: a percentage of the total price, including shipping and gift wrap, or a minimum amount, whichever is greater. The percentage depends on the category. In the US, Amazon calculates the referral fee without the sales tax that Amazon collects.
FBA fees: according to Amazon, FBA fees cover storage, picking, packing, shipping, returns and customer service. The fulfillment fee depends on the product's size and weight. Since April 17, 2026, Amazon adds a fuel and logistics surcharge of 3.5% to US fulfillment fees. From October 15, 2026 to January 14, 2027, holiday peak fulfillment fees apply.
Storage: monthly storage fees by volume, higher from October to December, a storage utilization surcharge for high inventory levels and an aged inventory surcharge for units stored 181 days or longer in the US.
Returns: on a refund, Amazon keeps a refund administration fee of $5 or 20% of the referral fee, whichever is lower. Products with a return rate above a category threshold, and all apparel and shoes, also pay a returns processing fee.
Advertising: Sponsored Products and other ads. Our guide to ACOS and TACoS explains how ad spend relates to sales.
Other costs: promotions and coupons, removals, tools, packaging and your own overhead.
Selling on amazon.de? Prices on amazon.de include VAT, while Amazon quotes the seller fees without VAT. According to Amazon's European seller agreement, the referral fee is calculated on the price including VAT. Deduct VAT before you calculate margin; the German fee details are in our FBA fee example calculation.
FBA or FBM: which costs differ
Whether Amazon fulfills your orders (FBA) or you ship the orders yourself (FBM) shifts costs between Amazon fees and your own costs. The selling plan, referral fee, advertising and COGS apply to both fulfillment methods.
Shipping and packing: with FBA, the FBA fulfillment fee covers picking, packing and shipping. With FBM, you pay for picking, packing and shipping labels yourself. Shipping charges that customers pay on FBM orders count as revenue, and Amazon charges the referral fee on those shipping charges too.
Storage: with FBA, Amazon charges storage fees and surcharges. With FBM, you pay for your own warehouse or logistics provider.
Returns: with FBA, a returns processing fee applies depending on the category and return rate. With FBM, you process returns yourself and pay costs such as labor and, where applicable, return labels. Amazon keeps the refund administration fee with both fulfillment methods.
What Amazon reports: Amazon charges the FBA fulfillment fee with every order. Amazon also charges you for shipping labels you buy through Amazon. Amazon does not know your other FBM costs, just as Amazon does not know your COGS.
COGS: the cost Amazon does not know
Amazon knows every fee Amazon charges you, but not your purchase price. In the Revenue Calculator, you enter an estimated cost of goods for each fulfillment option, and according to Amazon, the calculator does not save the cost of goods automatically. Amazon's Profit Analytics includes COGS only if you provide the cost data. Without COGS, every profit calculation is too high. In the example below, COGS is the largest single cost item.
Per unit sold: divide the cost of a shipment by the number of units. Purchase price, freight, duties and inbound shipping to Amazon's warehouse all belong in COGS.
At the cost on the order date: purchase prices change with reorders, freight costs and exchange rates. Calculate each sale with the COGS that applied on the order date. If you overwrite the old purchase price, the profit of past months changes retroactively.
Per marketplace: if you sell the same SKU on several marketplaces, freight and duties can differ by marketplace.
For lost inventory too: when Amazon reimburses lost or damaged FBA inventory, you receive a credit, but the goods are gone. Deduct the COGS of the reimbursed units, or the reimbursement looks like pure profit.
Formulas: profit, profit margin and ROI
Net revenue = sales price including shipping − refunds − promotions (on amazon.de also − VAT)
Profit = net revenue − COGS − Amazon fees − ad spend − other costs
Profit margin (%) = profit / net revenue × 100
ROI (%) = profit / COGS × 100
Profit margin shows how much of your revenue you keep. ROI shows how much you earn on the money you put into inventory. A product with a modest margin can still have a high ROI if the product is cheap to buy.
To see where margin is lost, calculate profit in tiers of contribution margin. sellerfox labels the tiers DB1 to DB3 (from the German Deckungsbeitrag) plus net profit:
DB1 (trade margin): net revenue after refunds and promotions, minus COGS.
DB2 (logistics margin): DB1 minus Amazon fees, shipping and gift wrap. For FBM, shipping includes pick-and-pack costs and shipping labels.
DB3 (marketing margin): DB2 minus ad spend.
Net profit: DB3 minus other costs.
Example: profit margin of an FBA product
The following example uses assumed values; use your own product's numbers. The referral fee and FBA fee depend on the category, size and weight.
Per unit | Amount | % of revenue |
|---|---|---|
Sales price | $24.99 | 100.0% |
COGS | −$7.00 | |
DB1 | $17.99 | 72.0% |
Referral fee (15%) | −$3.75 | |
FBA fulfillment fee | −$5.00 | |
Storage | −$0.25 | |
DB2 | $8.99 | 36.0% |
Advertising | −$2.00 | |
DB3 | $6.99 | 28.0% |
Other costs | −$0.40 | |
Net profit | $6.59 | 26.4% |
The profit margin in the example is 26.4% ($6.59 / $24.99) and the ROI is 94.1% ($6.59 / $7.00). If you ship yourself (FBM), the FBA fulfillment fee and storage fee drop out; instead, you deduct your costs for pick and pack, packaging and the shipping label in DB2, and the cost of your own storage comes on top. Refunds lower the result further. Each refund costs the refund administration fee and possibly a returns processing fee.
The same product shows how much an incomplete calculation distorts profit:
Without COGS, $13.59 (54.4%) would seem to remain, more than twice the actual net profit.
With only COGS, referral fee and FBA fulfillment fee, $9.24 (37.0%) would remain instead of $6.59.
Amazon publishes no benchmark for a "good" profit margin. Whether a margin is enough depends on your category, your price and how much you invest in ads. Calculate your break-even point instead: the guide to ACOS and TACoS shows how to derive your break-even ACOS from your margin.
What Amazon's calculators show and leave out
Revenue Calculator: Amazon's free Revenue Calculator estimates fees and profit per unit for FBA and your own fulfillment. You enter the cost of goods yourself and, for your own fulfillment, the shipping costs too. According to Amazon, the figures are estimates, and the calculator does not include monthly subscription fees, returns processing fees, refund administration fees or taxes.
Profit Analytics: In Seller Central, Profit Analytics combines sales, returns, fees, ads and the cost data you provide per SKU, ASIN and parent ASIN. According to Amazon, the metrics include tax by default, and the subscription fee is not included.
Both tools show fees and profit per product. Many calculators and tools only deduct the referral fee and the FBA fee; even Amazon's Revenue Calculator leaves out subscription, returns processing and refund administration fees. For the real profit of your business, you need every fee Amazon charges and the costs Amazon does not know.
How to track Amazon profit per product with sellerfox
Profit Tracking in sellerfox loads revenue, Amazon fees and refunds through Amazon's SP-API and ad spend through the Ads API. You add COGS, other income and expenses and your own FBM costs. Profit Tracking thus calculates with the costs Amazon charges and with the costs only you know:
More than 100 Amazon fee types in fixed cost categories: sellerfox reads every fee, credit and adjustment from Amazon's financial data and sorts more than 100 named Amazon fee types into fixed categories, such as referral fee, FBA fees, shipping, gift wrap and refunds. The remaining fee types, such as storage fees, coupons or Vine, appear individually under “Other Amazon Fees”. Fee types sellerfox does not know yet are still booked, under “Other Amazon Fees” or “Other Costs”, instead of being dropped.
Final instead of estimated fees: for new orders, Amazon fees are estimates at first. The final fees are usually available after 2–4 days and replace the estimate.
COGS with effective dates: you enter COGS per SKU and marketplace; each later date point starts on an “Effective from” date. Each order uses the COGS that applied on the order date. For a new purchase price, you add a new date point; past orders keep the previous COGS. You maintain many SKUs and several date points by CSV or XLSX import, in other currencies too. The “Missing” filter on the “COGS” tab shows SKUs without COGS.
Lost and damaged inventory: when Amazon reimburses lost or damaged FBA inventory, sellerfox also deducts the COGS of the reimbursed units. In the “Waterfall table”, these COGS appear under “Lost/damaged by Amazon”, and Amazon's reimbursement appears as a credit under “Other Amazon Fees”.
FBA and FBM: for FBA, sellerfox uses the fees Amazon reports. For FBM, you set your own cost rules in Profit Tracking Settings: “Pick & Pack Costs (FBM)” per order and per additional unit, “Shipping costs” as templates per marketplace, destination country and product with a flat rate, weight or size tiers, and “Return costs” per refunded order and unit. If Amazon reports actual shipping label costs for an order, sellerfox does not deduct an estimated shipping amount on top. New rates apply from an “Effective from” date, and the Shipping Cost Simulator shows which template and tier apply to a sample order.
VAT and input VAT: sellerfox uses the VAT that Amazon reports. If Amazon does not report VAT on an EU or UK marketplace, sellerfox can calculate VAT from your settings. Whether costs such as Amazon fees count net or gross depends on your input VAT setting.
Your own costs: you record software, tax advice or agency fees under “Income & Expenses”, once or as daily, weekly or monthly entries, and assign the amounts to marketplaces or SKUs.
The “Waterfall table” shows DB1, DB2, DB3 and net profit for any period, grouped by marketplace, child ASIN or parent ASIN, as amounts or as a share of net revenue. You can expand cost rows down to the subcategories. Grouped by SKU, ad spend, DB3 and net profit show “–”, because Amazon reports ad spend per ASIN, not per SKU.
Missing costs: sellerfox does not substitute a value for a cost you have not entered, so net profit is too high until all COGS are entered.
Product view: product rows include only the costs that sellerfox can attribute to the product; the full cost scope is in the marketplace view without marketplace or product filters.
With the sellerfox MCP server, you can also ask Claude, ChatGPT and other compatible AI assistants about profit and costs. Our guide to AI for Amazon sellers shows what the assistant reads. The Profit Tracking guide in the sellerfox documentation explains the setup, COGS per SKU and the import.
Amazon profit margin FAQ
How do I calculate my Amazon profit margin?
Divide your profit by your net revenue and multiply by 100. Profit is net revenue minus cost of goods, Amazon fees, ad spend and other costs. On amazon.de, deduct VAT from the price first.
What belongs in cost of goods sold (COGS)?
The purchase price per unit plus freight, duties and inbound shipping to Amazon's warehouse, divided across each unit sold. When the purchase price changes, calculate each sale with the COGS that applied on the order date.
How does profit calculation differ between FBA and FBM?
With FBA, you deduct the FBA fulfillment fee, storage fees, surcharges and, where applicable, the returns processing fee that Amazon charges. With FBM, those fees drop out; instead, you deduct your own costs for storage, pick and pack, packaging, shipping labels and returns. The referral fee, advertising and COGS apply to both fulfillment methods.
What is a good profit margin on Amazon?
Amazon publishes no benchmark. A margin is good enough if the margin covers your ad spend, returns and overhead and leaves the profit you need. Compare your products against each other and against your break-even ACOS.
Is the referral fee calculated on the price including tax?
In the US, Amazon calculates the referral fee without the sales tax Amazon collects. On amazon.de, the referral fee is calculated on the price including VAT, according to Amazon's European seller agreement.
Does Amazon's Revenue Calculator show my real profit?
No. Amazon calls the figures estimates. The calculator does not include subscription fees, returns processing fees, refund administration fees or taxes, and you enter the cost of goods yourself.
Conclusion: calculate profit with every cost, not just per unit
Your Amazon profit is what remains after cost of goods, Amazon fees, ads, returns and overhead. Maintain your COGS at the cost on the order date, calculate profit in tiers to see where the margin goes and track the real profit per product and marketplace over time. Amazon's Revenue Calculator works for quick estimates before you buy inventory.
Ready to see your real profit? sellerfox sorts more than 100 Amazon fee types into fixed cost categories and calculates with your COGS on the order date, from DB1 to net profit per product and marketplace, for FBA and FBM. Start your 30-day free trial.
Sources: Amazon: Selling fees · Amazon: Selling on Amazon fee schedule · Amazon: FBA features, services and fees · Amazon: 2026 US FBA fulfillment fee changes · Amazon: Aged inventory surcharge · Amazon: Returns processing fee · Amazon: Revenue Calculator · Amazon: Profit Analytics · Amazon: Business Solutions Agreement (Europe, German)