Amazon's 15% referral fee plus FBA and storage charges quietly eat your margin — enter your real costs and see true net profit, ROI and break-even before you commit inventory cash.
Amazon referral fee (per unit)
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$
Total Amazon fees (per unit)
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$
All-in cost (per unit)
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$
Net profit (per unit)
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$
Net margin
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%
Return on investment (ROI)
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%
Amazon's cut of your sale
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%
Break-even list price
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$
Projected monthly profit
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$
FBA Profit, Margin & ROI Calculator Enter your list price and every cost — supplier cost, freight, FBA fee, storage, ads and returns — and see net profit per unit, margin, ROI and Amazon's total cut on one screen.
Amazon Referral-Fee Category Presets Pick from 22 Amazon categories and the tool applies that category's published referral rate (8% electronics, 15% most, 17% clothing, 20% jewelry, 45% device accessories); some categories vary by price tier.
Break-even Price Finder Shows the lowest list price that still covers all fees and costs, so you know how far a price war can go before the product starts losing money.
Save & Compare Product Candidates Store each product you research on your own device (chrome.storage) and compare their net profit and ROI side by side — no account, no upload, no internet.
Monthly Profit Projection Multiply net profit per unit by your expected monthly sales to see projected monthly profit before you commit inventory cash.