Amazon FBA & FBM revenue calculator
Compare FBA and FBM profit, ROI, margin, break-even and maximum unit cost using your own shipping quote. Starting values are examples; replace them before making a purchase.
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The numbers you type. Amazon's referral and FBA fees are input fields showing their default, not a silent 15% — and every figure is worked out in your browser, so nothing is sent anywhere.
Amazon United States · USD. Preloaded hypothetical example, without an Amazon lookup. Replace fees and shipping with your actual figures.
FBA
- Profit per unit
- $8.39
- ROI
- 61.7%
- Margin
- 28.0%
- Break-even price
- $20.12
- Max cost at 30% ROI
- $15.82
- Referral fee
- $4.50
- Fulfillment / label
- $3.50
- Inbound to Amazon
- $0.60
- Capital per unit
- $13.60
Profit: 29.99 − 4.4985 − 3.5 − 0.6 − 0.5 − 12.5 = $8.39
FBM
- Profit per unit
- $5.49
- ROI
- 42.2%
- Margin
- 18.3%
- Break-even price
- $23.53
- Max cost at 30% ROI
- $13.72
- Referral fee
- $4.50
- Fulfillment / label
- $7.00
- Inbound to Amazon
- $0.00
- Capital per unit
- $13.00
Profit: 29.99 − 4.4985 − 7 − 0 − 0.5 − 12.5 = $5.49
How it is calculated
profit = sale − (sale × referral%) − fulfilment − prep − shipping − cost
- sale
- the price the unit sells for on Amazon, before anything is deducted
- referral%
- Amazon's commission on the sale price. It depends on the category — 15% is the most common band and the value this page starts with, but it is a field you can overwrite with the figure from your own Seller Central
- fulfilment
- who moves the box. On FBA it is Amazon's fulfilment fee, which depends on size tier and weight ($3.50 is the starting value, not a reading of your ASIN). On FBM it is the carrier label you enter. Historical rate-card scenarios require an explicit opt-in
- prep
- polybag, label, bundling — whatever you or your prep centre charge per unit. Paid on both lanes
- shipping
- on FBA, what it costs you to get one unit into Amazon's warehouse. On FBM there is no separate term: the label is already the fulfilment cost
- cost
- the supplier's price for one unit — the number on the price list
- break-even price
- the sale price at which profit is exactly zero, everything else held: (fulfilment + prep + shipping + cost) ÷ (1 − referral%). Below it the unit loses money no matter how fast it sells
- max cost
- the inverse question, and the one you actually have in front of a supplier list: the most you can pay per unit and still hit a target ROI. (sale − referral − fulfilment − shipping − prep×(1+target) − target×shipping) ÷ (1 + target)
Worked example
- Illustrative inputs: sale $29.99, cost $12.50, referral 15%, FBA fee $3.50, prep $0.50, inbound $0.60, FBM shipping $7.00, target ROI 30%. These are assumptions, not observed Amazon fees or a carrier quote.
- Referral: $29.99 × 0.15 = $4.4985. Calculations keep full precision and the display rounds to cents.
- FBA profit: 29.99 − 4.4985 − 3.50 − 0.60 − 0.50 − 12.50 = $8.39. ROI = 8.3915 ÷ 13.60 = 61.7%; margin = 28.0%.
- FBM profit with the $7 assumed label: 29.99 − 4.4985 − 7 − 0.50 − 12.50 = $5.49. ROI = 5.4915 ÷ 13 = 42.2%; margin = 18.3%.
- Break-even: FBA $17.10 ÷ 0.85 = $20.12; FBM $20.00 ÷ 0.85 = $23.53. Replace the shipping assumption with your actual quote.
- Maximum unit cost at 30% ROI: FBA $15.82; FBM $13.72. Excludes storage, placement, returns, advertising, tax and labor beyond the prep input.
One unit is arithmetic. The price list is the job.
This page prices one unit with the fees you typed. FlipIQ Batch connects to your Amazon account read-only over the official SP-API, pulls the FBA and FBM fees Amazon charges you for each ASIN, checks whether your account may sell that item at all — restrictions are per account, not generic — and runs the whole supplier list as it arrived: Excel, CSV, or the 300-page distributor PDF. 5,000 rows a month free, no card.
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