eBay ROI Calculator
You bought inventory, paid for an eBay Store, and maybe ran Promoted Listings. Did it pay off? Enter your total investment including sourcing, eBay fees paid, and shipping, plus how many units you sold and at what price, and instantly see net profit, ROI, and how long until that investment paid for itself.
Instant calculations · Editable fee assumptions · Export-ready results
Inputs
Values update results instantly. Adjust fee assumptions to match your seller dashboard.
Investment
Total upfront spend on product sourcing for this batch.
eBay Store setup, tools, photography, packaging bulk buy.
Sales results
Average price per unit sold on eBay.
How many units from this batch you sold.
eBay costs
Sum of final value, insertion, and promoted fees paid for these units.
Total postage you paid to fulfill these orders.
Total mailers, boxes, tape for this batch.
Timing
How many months it took to sell these units. Used for monthly and payback math.
Results
Live estimates based on your inputs and editable fee assumptions.
Total investment
$1,100.00
All costs put into this batch.
Total revenue
$1,999.50
Selling price × units sold.
Total costs
$500.00
Fees + shipping + packaging.
Net profit
$399.50
Revenue minus all costs and inventory investment.
ROI
36.3%
Net profit as % of total investment.
Profit per unit
$7.99
Net profit divided by units sold.
Payback months
3
Months to earn back investment.
Profit margin
Good20.0%
Net profit as % of revenue.
What this means
Strong: $399.50 net profit, 36.3% ROI, 1.82x return. $7.99 per unit with 20.0% margin. Payback around 3 months over 3 months.
eBay investment vs return
Interactive breakdown of fees, costs, and remaining profit.
Distribution
- Inventory + upfront$1,100.0055.0%
- eBay + fulfillment$500.0025.0%
- Net profit$399.5020.0%
Total $1,999.50 · 3 segments · interactive
Line-item breakdown
Dollar amounts, share of revenue, and visual proportion.
- Inventory investment
- $1,000.00
- Other upfront
- $100.00
- Total investment
- $1,100.00
- Total revenue
- $1,999.50
- eBay fees paid
- $250.00
- Shipping cost
- $200.00
- Packaging cost
- $50.00
- Total operational
- $500.00
- Total outlay
- $1,600.00
- Net profit
- $399.50
- Profit per unit
- $7.99
- ROI
- 36.3%
- Profit margin
- 20.0%
- Return multiple
- 1.82
Assumptions used
- • Investment $1100.00 = inventory $1000.00 + other $100.00
- • Revenue $1999.50 = $39.99 × 50
- • Operational $500.00 fees + shipping + packaging
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eBay ROI Calculator
Generated 7/30/2026, 5:45:42 AM · Currency USD
Inputs
- Initial inventory investment: 1000
- Other upfront costs: 100
- Average selling price: 39.99
- Units sold: 50
- Total eBay fees paid: 250
- Total shipping cost: 200
- Total packaging cost: 50
- Period in months: 3
Results
- Inventory investment: $1,000.00
- Other upfront: $100.00
- Total investment: $1,100.00
- Total revenue: $1,999.50
- eBay fees paid: $250.00
- Shipping cost: $200.00
- Packaging cost: $50.00
- Total operational: $500.00
- Total outlay: $1,600.00
- Net profit: $399.50
- Profit per unit: $7.99
- ROI: 36.3%
- Profit margin: 20.0%
- Return multiple: 1.82
Interpretation
Strong: $399.50 net profit, 36.3% ROI, 1.82x return. $7.99 per unit with 20.0% margin. Payback around 3 months over 3 months.
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
- 1Total investment = initialInventoryCost + otherUpfrontCosts.
- 2Total revenue = sellingPrice × unitsSold.
- 3Total operational costs = totalEbayFeesPaid + totalShippingCost + totalPackagingCost.
- 4Total outlay = totalInvestment + totalOperationalCosts.
- 5Net profit = totalRevenue − totalOutlay.
- 6ROI percent = netProfit ÷ totalInvestment × 100.
- 7Profit per unit = netProfit ÷ unitsSold.
- 8Payback months estimates when cumulative profit covers total investment.
Formulas
- Investment = inventory + upfront
- Revenue = price × unitsSold
- TotalOutlay = investment + eBayFees + shipping + packaging
- NetProfit = revenue − totalOutlay
- ROI% = netProfit ÷ investment × 100
- ProfitPerUnit = netProfit ÷ unitsSold
- Margin% = netProfit ÷ revenue × 100
Important assumptions
- Total investment includes inventory plus upfront costs like Store and tools.
- Total revenue is selling price times units sold — shipping charged to buyer should be included in selling price input or modeled separately.
- Total eBay fees paid should include final value, insertion, and promoted fees for the sold units only.
- ROI is net profit divided by total investment including inventory.
- Payback assumes profit accrues evenly over the period entered.
- This is pre-tax and excludes returns and eBay managed payment delays unless you include them.
Worked example
Thrift flip batch
$1000 inventory + $100 other costs, sold 50 units at $39.99, $250 total eBay fees, $200 shipping, $50 packaging, over 3 months.
FAQ
Common questions
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