Hello Obi,
Greetings !!
The prorated amount is automatically calculated by the Pabbly Subscription Billing system when a subscription is upgraded or downgraded. This prorated amount is determined based on the per-day charge of the subscription, which represents the amount you would charge your customer per day for that subscription service.
For example, let's say the subscription is of $100 of 30 days, and it is upgraded or downgraded after 15 days. In this case, the prorated amount would be $50.
In the scenario where the subscription is downgraded and the price of the new subscription is less than the prorated amount, the remaining prorated amount is transferred as a credit towards future subscriptions.
If you have any other concerns, please feel free to contact us. We are always happy to assist you.
Thanks & Regards,
Mukesh
Pabbly Support