About MarginSum

MarginSum builds free, fast tools for independent and cross-border e-commerce sellers who want to know their real margins.

How we source data

• Every built-in fee comes from the provider's official public pricing page, linked next to the figure with the date we last checked it.
• If we cannot verify a number, we don't guess: the field stays empty and editable, with a note.
• Results are estimates, not tax, legal or financial advice.

Contact

Found an outdated fee? Please email [email protected].