Amazon ROI Calculator
Amazon ROI is not just revenue minus product cost. True ROI starts with initial inventory cash tied up, then adds per-unit Amazon referral plus FBA or FBM fulfillment, inbound and prep, advertising spend, and your monthly fixed tool and subscription costs spread across units sold. This calculator gives you total investment, total revenue, net profit, ROI percent, profit per unit, and estimated payback period so you know if a product deserves a reorder.
Instant calculations · Editable fee assumptions · Export-ready results
Inputs
Values update results instantly. Adjust fee assumptions to match your seller dashboard.
Investment
Cash for first inventory purchase (excluding per-unit calcs duplicate).
Per unit costs
Sourcing cost per unit sold.
Referral + fulfillment per unit.
Inbound to FBA, packaging, prep, labels.
Revenue
Amazon listing price.
How many units you expect to sell.
Marketing & fixed
PPC and promotions spent to sell these units.
Per month overhead related to Amazon.
Duration over which units were sold.
Results
Live estimates based on your inputs and editable fee assumptions.
Total revenue
$8,997.00
Selling price times units sold.
Total variable costs
$5,100.00
Product + Amazon fees + shipping/prep times units.
Ads + fixed costs
$1,800.00
Ad spend plus monthly fixed x months.
Total investment (inventory + costs)
$4,800.00
All cash out for this period.
Net profit
$2,097.00
Revenue minus all costs.
ROI %
43.7%
Net profit divided by total investment.
Profit per unit
$6.99
Net profit divided by units sold.
Payback period months
4.29
Estimated time to earn back initial inventory.
What this means
Healthy ROI 43.7% on $4800.00 invested (initial $3000.00 + fixed+ads $1800.00). Net profit $2097.00 over 3 months ($699.00/mo), $6.99 per unit. Payback 4.3 months to recover inventory cash.
Amazon ROI breakdown
Interactive breakdown of fees, costs, and remaining profit.
Distribution
- Product costs$2,100.0023.3%
- Amazon fees$2,550.0028.3%
- Shipping & prep$450.005.0%
- Ads + fixed$1,800.0020.0%
- Net profit$2,097.0023.3%
Total $8,997.00 · 5 segments · interactive
Line-item breakdown
Dollar amounts, share of revenue, and visual proportion.
- Revenue
- $8,997.00
- Product total
- $2,100.00
- Amazon fees total
- $2,550.00
- Shipping & prep total
- $450.00
- Total variable
- $5,100.00
- Ads + fixed
- $1,800.00
- Total investment base
- $4,800.00
- Total cash out (incl variable)
- $9,900.00
- Net profit
- $2,097.00
- ROI %
- 43.7%
- Profit per unit
- $6.99
- Payback months
- 4.29
Assumptions used
- • Revenue $8997.00 = $29.99 × 300
- • Variable $5100.00 = product $7.00 + fees $8.50 + ship/prep $1.50 per unit × 300
- • Fixed+ads $1800.00 = ads $1200.00 + fixed $200.00×3 months
- • ROI base $4800.00 = initial $3000.00 + fixed+ads $1800.00
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Amazon ROI Calculator
Generated 7/30/2026, 5:47:37 AM · Currency USD
Inputs
- Initial inventory investment: 3000
- Product cost per unit: 7
- Amazon fees per unit (referral + FBA/FBM): 8.5
- Shipping and prep per unit: 1.5
- Selling price per unit: 29.99
- Units sold in period: 300
- Total advertising spend for period: 1200
- Monthly fixed costs (tools, pro, VA): 200
- Months in this period: 3
Results
- Revenue: $8,997.00
- Product total: $2,100.00
- Amazon fees total: $2,550.00
- Shipping & prep total: $450.00
- Total variable: $5,100.00
- Ads + fixed: $1,800.00
- Total investment base: $4,800.00
- Total cash out (incl variable): $9,900.00
- Net profit: $2,097.00
- ROI %: 43.7%
- Profit per unit: $6.99
- Payback months: 4.29
Interpretation
Healthy ROI 43.7% on $4800.00 invested (initial $3000.00 + fixed+ads $1800.00). Net profit $2097.00 over 3 months ($699.00/mo), $6.99 per unit. Payback 4.3 months to recover inventory cash.
How it works
Methodology & formulas
This calculator is transparent by design. Review the steps and formulas so you can trust the estimate and adjust assumptions when your dashboard differs.
Calculation steps
- 1Revenue = sellingPrice × unitsSold.
- 2VariableTotal = (productCostPerUnit + amazonFeesPerUnit + shippingAndPrepPerUnit) × unitsSold.
- 3FixedAndAdsTotal = advertisingSpend + monthlyFixedCosts × monthsInPeriod.
- 4OperatingCost = variableTotal + fixedAndAdsTotal.
- 5NetProfit = revenue − operatingCost.
- 6TotalInvestmentForROI = initialInventoryInvestment + fixedAndAdsTotal? Simpler: we show total cash out = initialInventory + operatingCost. ROI % = netProfit / (initialInventory + fixedAndAdsTotal) when initial>0 else netProfit/revenue.
- 7ProfitPerUnit = netProfit / unitsSold.
- 8MonthlyProfitRate = netProfit / monthsInPeriod when months>0. PaybackMonths = monthlyProfit>0 ? initialInvestment / monthlyProfitRate : 0.
Formulas
- Revenue = price × unitsSold
- Variable = (product + amazonFees + shippingPrep) × units
- FixedAndAds = adSpend + monthlyFixed × months
- NetProfit = revenue - variable - fixedAndAds
- TotalInvestment = initialInventory + fixedAndAds
- ROI% = netProfit ÷ totalInvestment ×100
- ProfitPerUnit = netProfit ÷ unitsSold
- PaybackMonths = initialInvestment ÷ (netProfit ÷ months)
Important assumptions
- Total revenue equals selling price times units sold.
- Total variable costs equal sum of product, Amazon fees, and shipping/prep per unit times units sold.
- Total fixed and advertising equals advertisingSpend plus monthlyFixedCosts times monthsInPeriod.
- Total investment equals initial inventory investment plus total variable costs plus total fixed and ads? Actually total investment modeled as initialInventoryInvestment + totalVariable + fixed+ads to capture cash out, then profit = revenue - (variable + fixed+ads) not double counting initial if already per-unit? To avoid double count, this calculator treats initial as cash tied plus variable as cost of goods sold during period; for ROI, total cost = variable + fixed+ads; investment base for ROI = initial + fixed overhead portion? See methodology note.
- Profit per unit based on net profit divided by units sold.
- Payback estimates months to recover initial inventory investment from monthly profit rate.
Worked example
First order private label launch
$3000 initial inventory, product $7, Amazon fees $8.50, shipping prep $1.50 per unit, price $29.99, 300 units sold over 3 months, $1200 ad spend, $200 monthly fixed tools, 3 months period.
FAQ
Common questions
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