How to calculate the prorated refund?

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Created Nov ’22

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Hi, as I read in the Apple v2 notification, when I get a DID_CHANGE_RENEWAL_PREF notification with the UPGRADE subtype, the change to the upgraded product will be immediate and the user get a prorated refund.

my question is: If the cost of the first subscription is 100$ and the subscription period is a month and I upgrade to another product after 1 week. How do I calculate the prorated refund? Do I get a CANCEL notification indicating any refund?

Thanks!

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Answer 1

App Store Commerce Engineer OP

Apple

Nov ’22

With notifications V2 we work to only send one notification per event. Therefore since UPGRADE implies a pro-rated refund, this is all encompassed in the one notification, and a separate REFUND should not be sent. You can use the isUpgraded field on transactions to see if that transactions was upgraded from and therefore partially refunded.

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