Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Dear Jacquelyn Tam,
Good day!
Thank you for posting to Microsoft Community. We are glad to assist.
For Office 365 business subscription, the charge from credit card will be based on the invoice amount. No additional fee from Microsoft. While if the currency on the invoice is different as your credit card default currency, there may be exchange rate difference based on your bank exchange current rate.
Hope this can clarify your issue, if you have any further concern, please feel free to reply to me. Thanks.
Have a nice weekend.
Sincerely,
Anesu | Microsoft Community Moderator