Amazon FBA Profit Calculator | Free Fee & Margin Tool

Fees change, so confirm your exact numbers

This calculator uses typical 2026 fee ranges. Referral fees run 8 to 45 percent by category (15 percent is the common default), and fulfillment fees depend on your product’s size tier and weight. For an exact figure, pull your product’s fees from Amazon Seller Central and paste them in.

How Amazon FBA fees work

Amazon takes its cut in a few buckets, and knowing each one is the difference between a profitable SKU and a money-loser you did not see coming.

Referral fee. A percentage of your total sale price that Amazon charges for selling on the platform. Most categories are 15 percent, but it ranges from 8 to 45 percent, and there is a $0.30 minimum per item.
Fulfillment fee. A flat per-unit charge for picking, packing, and shipping, based on your product’s size tier and shipping weight. Amazon uses the greater of actual or dimensional weight.
Cost of goods. What you pay your supplier per unit, plus inbound shipping to get it into Amazon’s network.
Other costs. Storage, prep, returns, and advertising all eat into margin. The calculator includes an optional field so you can fold them in.

How to read your result

The net profit figure is what you keep per unit after every fee and cost above. Two numbers matter alongside it: net margin (profit as a percentage of your selling price) tells you how healthy the product is, and ROI (profit as a percentage of your product cost) tells you how hard your cash is working. Many experienced sellers look for at least a 15 to 20 percent net margin and a strong ROI before committing to a SKU.

Tips to protect your FBA margin

Right-size your packaging. Shrinking a product into a lower size tier can cut the fulfillment fee significantly.
Watch dimensional weight. Light but bulky items are priced on volume, not weight, which surprises new sellers.
Turn inventory fast. Aged-inventory surcharges kick in after about 181 days, so slow stock costs extra.
Source better, not just cheaper. A lower product cost lifts both margin and ROI. Browse verified Amazon FBA wholesale suppliers to improve your landed cost.

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Frequently asked questions

How do I calculate Amazon FBA profit?

Start with your selling price, then subtract the referral fee (a percentage of the sale), the FBA fulfillment fee (a flat charge by size tier), your product cost, inbound shipping, and any other per-unit costs. What remains is your net profit. This calculator does it live as you type.

What is the Amazon referral fee?

The referral fee is Amazon’s sales commission, charged as a percentage of your total sale price. Most categories are 15 percent, though it ranges from 8 to 45 percent depending on category, with a $0.30 minimum per item.

How much is the FBA fulfillment fee?

Fulfillment fees depend on your product’s size tier and shipping weight. A small standard item often runs around $3 to $4, large standard items more, and large bulky or oversize items significantly more. Use the size buttons for a typical figure or enter your exact fee from Seller Central.

What is a good profit margin for Amazon FBA?

Many experienced sellers aim for at least a 15 to 20 percent net margin after all fees, along with a healthy ROI on their product cost. Thin-margin SKUs leave no room for returns, storage, or ad spend, so build in a cushion.

Does this include storage and advertising costs?

Not automatically, since those vary widely. Use the optional “Other costs” field to add per-unit storage, prep, returns, or advertising so your net profit reflects the full picture.

Know your margin? Now source smarter.

Browse verified Amazon FBA wholesale suppliers to lower your product cost and lift your profit.

Find FBA suppliers