Ecommerce Profit & Fee Calculator
Estimate profit per sale, margin, ROI, marketplace fees, advertising cost, fulfillment, and returns allowance using your current numbers.
Per-sale estimate
Percentage-based fees
$12.50
Total estimated cost
$35.50
Profit per sale
$14.50
Profit margin
29.0%
ROI on estimated cost
40.8%
Enter current fees from your own marketplace statement. This tool does not assume or fetch platform fee rates.
Instructions, formula & limitations
How to use
- Enter the selling price and landed product cost in one currency.
- Add fulfillment, fixed fees, current marketplace fee percentage, advertising percentage, and a returns allowance.
- Compare profit, margin, and ROI, then test different prices or cost assumptions.
Calculation method
Percentage-based fees equal selling price × the combined marketplace and advertising rates. Profit equals selling price minus every entered cost. Margin divides profit by selling price; ROI divides profit by estimated total cost.
Limitations
This calculator does not fetch platform fee schedules, taxes, exchange rates, storage tiers, or refunds. Use current statements and rules from the marketplace and verify every assumption before pricing.
Common questions
What is the difference between margin and ROI?
Margin compares profit with selling price. ROI compares profit with the estimated costs used to make the sale.
Are marketplace fees updated automatically?
No. Enter the current percentage and fixed fees from your own marketplace statement or official fee page.
Should product cost be supplier cost or landed cost?
Use landed product cost when possible so freight and import expenses are represented in the profit estimate.