See your real Amazon profits with the FBA fee calculator
Amazon referral, fulfillment, and storage fees quietly eat your margin. Enter your product price, cost, and fee estimates — then see exactly how much you actually keep per unit, per month.
Amazon FBA Fee Calculator
Add product costs and Amazon fees to see your true per-unit profit, margin, and ROI.
Monthly net profit
$3,282.45
300 units × $10.94 per unit
What this FBA calculator helps you figure out
How Amazon FBA fees actually work
Amazon charges a referral fee on every sale — typically 15%, but it can range from 8% in electronics to 20% in jewelry. Pick the category that matches your listing so the referral number is realistic.
The FBA fulfillment fee is a flat per-unit charge that depends on the item's size tier and weight. Small standard items start around $3.25, while large or oversize items can be $10 or more.
Monthly storage fees are based on cubic feet occupied in Amazon warehouses. They jump sharply from October to December, so always factor peak-season storage into your Q4 margin.
Add inbound shipping, product cost, and any prep fees, then subtract all Amazon fees to see your real net profit per unit. That number — not the sale price — is what you build the business on.
Frequently asked questions
What fees does Amazon FBA charge?
The three main fees are the referral fee (a percentage of the sale price, based on category), the fulfillment fee (pick, pack, and ship — based on size and weight), and the monthly storage fee (based on cubic feet). Other fees like long-term storage, removal, and returns may also apply.
How accurate is this calculator?
It gives a very close estimate when you plug in realistic fulfillment and storage fees. For precise, SKU-level numbers, cross-check with Amazon's own revenue calculator or your Seller Central reports.
What is a healthy FBA profit margin?
Most sellers aim for 25% to 40% net margin and at least 100% ROI on product cost. Thinner margins are harder to sustain once you factor in PPC, returns, and inventory risk.
Does the calculator include PPC and ad spend?
Not directly. Treat the net profit figure as your pre-advertising margin and subtract your average ACoS or TACoS to see the real take-home after Amazon PPC.
Why is my FBA profit lower than I expected?
Usually because of underestimated fulfillment fees, long-term storage, returns, or coupons and promos. The calculator lets you adjust fee inputs so you can model a realistic worst-case scenario.
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