How are subscription updates handled?

[aditya-vinodh]

When a user changes from a monthly to a yearly plan, how is this handled in Polar?

I'm currently using the webhook and listening to the order.created event. When the billing_reason is set to subscription_update, I know the product is being changed.

When I check the customer portal, it appears as if it uses the same start date as the old plan, and moves the renewal date accordingly. But the payload in the webhook doesn't show this new renewal date. it only shows the old plan's dates.

I'd like to know when the user actually pays or the invoice is generated: immediately, at the end of the current plan's end, or at the end of the new plan's end.

Can someone help me out with this? Thanks.