Amazon FBA · free · no signup
Amazon FBA Profit Calculator
Enter your price and costs once. See profit per unit, margin, ROI, and your break-even price update live — with every Amazon fee spelled out on the receipt.
How the math works
The fee stack behind your FBA profit
Amazon takes its share at several points in the lifecycle of a unit, and each deduction behaves differently. The referral fee scales with your price; FBA fulfillment scales with size and weight; storage scales with time in the warehouse; inbound freight and product cost are fixed by your supply chain. A price change therefore changes your fees, not just your revenue — which is exactly why break-even needs the formula, not eyeballing.
Profit per unit
Break-even price
Because the referral fee is a percentage of price, break-even isn't just "costs plus fees". Solve for the price where profit = 0:
At a 15% referral fee, every $1 of fixed cost needs roughly $1.18 of price to break even — the multiplier gets worse as the fee rises.
Margin vs. ROI
Margin is profit divided by price: it tells you how much of each sale you keep. ROI is profit divided by your cash cost (product + inbound + other): it tells you how hard your inventory investment works. Margin pays the bills; ROI decides whether the inventory deserves your next order.
Questions
FBA calculator FAQ
How is FBA profit calculated?
Profit per unit = selling price − referral fee − FBA fulfillment fee − monthly storage (per unit) − inbound shipping per unit − product cost − other costs per unit. The referral fee is a percentage of your selling price, which is why your break-even price rises faster than fixed costs alone.
What is a good profit margin for Amazon FBA?
Most experienced sellers aim for at least 15–20% net margin after all fees and product cost, with 25%+ considered healthy. Anything under 10% leaves little room for advertising, returns, and fee changes.
What ROI should I target?
A common benchmark is 50–100% ROI on your cash investment (product cost plus inbound shipping). Below that, inventory cycles tie up capital faster than it earns.
Are the fee defaults current?
They are editable estimates based on published US fee schedules, last verified August 2026. Since 2026, two changes matter: fulfillment fees now vary by size tier AND product price band (under $10 / $10–50 / over $50), and a 3.5% fuel & logistics surcharge applies to FBA fulfillment fees starting April 17, 2026 (roughly $0.15–$0.35 extra per unit). Always verify exact rates in Seller Central (Revenue Calculator) before committing to inventory.
Keep calculating
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