How to use this calculator
- Enter selling price, marketplace fee rate (%), fixed transaction fee, product and fulfillment cost.
- Choose a display currency, then select Calculate. Results also update after a brief pause while you edit.
- Read the result with the assumptions below. Export details or save a second scenario to compare your choices.
Formula and method
Assumptions and limitations
This is not a current fee schedule for any named marketplace. Enter the applicable charge base and all relevant costs yourself.
Worked example
With selling price = 100, marketplace fee rate (%) = 10, fixed transaction fee = 1, product and fulfillment cost = 60, total modeled marketplace fees is approximately 11.
What the result means
The result is transaction contribution before unentered overhead, advertising and tax.
Common questions
How should I interpret total modeled marketplace fees?
The result is transaction contribution before unentered overhead, advertising and tax.
What should I check before using this result?
This is not a current fee schedule for any named marketplace. Enter the applicable charge base and all relevant costs yourself.
Methodology and transparency
Calculation specification reviewed on 2026-10-14. Mathematical implementation is tested against independent reference fixtures. This does not imply review by a licensed financial professional. Read the testing and precision policy.