Step 1
Add every cost
Product cost, referral fee (~15% of sale), FBA fulfillment fee (per-unit by size/weight), and storage across the months you hold it.
Free Amazon FBA Tool
Free Amazon FBA net profit & ROI calculator.
Enter your cost, selling price, referral fee, FBA fulfillment fee, and storage. See true net profit, ROI, margin, and a break-even alert — instantly, before you buy. It runs entirely in your browser and nothing is sent to us. Part of the ResellReady sourcing & net-profit terminal.
ResellReady FBA benchmarks 2026 — free to cite with attribution
- Target net ROI for a profitable FBA source: ≥ 30% after all fees.
- Below 15% net ROI, capital usually works harder in faster-moving inventory.
- Amazon referral fee runs 8%–17% of the sale by category (commonly 15%).
- Typical fee drag on a ~$25 item: 35%–40% of sale price (referral + fulfillment).
- Long-term storage fees kick in after 181 days — slow units erode margin.
Free tool — no signup
Amazon FBA profit & ROI calculator.
Enter your numbers. See true net profit and ROI after Amazon's referral fee, FBA fulfillment fee, and storage — with a margin break-even alert.
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Category preset (sets referral %)
Referral and FBA fulfillment fees vary by category, size, and weight — defaults are typical Amazon US rates and exclude advertising and long-term storage. Runs entirely in your browser: nothing is sent to us or saved.
Net profit / unit
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Referral fee—
FBA fee—
Storage—
Your cost—
ROI—
Margin—
The formula
How to calculate true Amazon FBA net profit.
Gross margin lies on Amazon — the fees hide 35–40% of the sale on a typical item. Net profit is what actually lands in your account.
Step 2
Net profit & ROI
Net = price − referral − FBA − storage − cost. ROI is net ÷ cost; margin is net ÷ price. Benchmark ROI on net, never gross.
Step 3
Check break-even
Break-even selling price is cost plus all fees. Under it you lose money; under a 15% margin the flip is thin. The calculator flags both.
Common questions
Amazon FBA profit FAQ.
How do you calculate Amazon FBA net profit?
Amazon FBA net profit is the selling price minus the referral fee (typically 15% of the sale), the FBA fulfillment fee (a per-unit charge based on size and weight), monthly storage, and your product cost. Gross profit ignores those fees; net profit is what actually reaches your bank. ResellReady deducts all of them automatically.
What is a good ROI for Amazon FBA?
Most experienced FBA sellers target at least 30% net ROI after all Amazon fees. Below 15% net ROI, the capital, storage risk, and time usually work harder in faster-moving inventory. ROI is net profit divided by product cost; margin is net profit divided by selling price.
What fees does Amazon FBA charge?
Amazon charges a referral fee (about 8% to 17% of the sale depending on category, commonly 15%), an FBA fulfillment fee per unit based on size and weight, and monthly storage fees. Optional costs include long-term storage, returns processing, and advertising. All of these reduce true net profit.
How much does Amazon FBA storage cost?
FBA monthly storage is charged per cubic foot and is higher in Q4 (October to December). Slow-selling units also accrue long-term storage fees after 181 days. Storage is easy to ignore but compounds on inventory that does not sell through, which is why this calculator lets you model storage months.
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Beyond one item
Source profitable FBA inventory at scale.
ResellReady pulls live comps, deducts every fee across six marketplaces, ranks wholesale suppliers, and builds a 90-day sourcing calendar — so you buy the right inventory, not just cheap inventory.
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