Is there a way of switching paid plans for a yearly subscription? Using the unused part of the year as credit for the upgrade to a higher tier?
There are two ways to accomplish this.
One → you can swap the member's plan yourself by updating the subscription in Stripe.
Two → the member can upgrade their account by clicking on a
data-ms-price:update button for the yearly plan. This will launch the Stripe checkout and automatically prorate the purchase.
Keywords: proration, discount, reduced price, prorate, etc.