Variable fees
These can scale with order value, category or transaction amount.
Fixed and recurring costs
Per-order charges, listings, subscriptions and apps may need to be allocated across expected sales volume.
Program-specific costs
Fulfillment, creator commissions, promoted listings and advertising should remain visible rather than being hidden inside a generic fee percentage.
Keep assumptions current
Platforms can change fee schedules. Always verify the current official terms for your market, category and seller program.
Use the numbers
Educational guidance is most useful when paired with your own SKU economics. Run the same assumptions through the calculator, then compare marketplaces if channel selection is part of the decision.