k3x_

[sand hull]

1. With proration_behavior="none" I think that would actually tell Stripe to charge the full subscription amount immediately. You can put that off either by setting a trial_end that ends when the current sub ycles or you can use a subscription schedule. The first two examples on this page show backdating a subscription and starting a subscription in the future which seem relevant to your question https://stripe.com/docs/billing/subscriptions/subscription-schedules/use-cases#start-subscription-future

2. Those all seem like good fields to pass. Not immediately thinking of another one that you would need to pass. If you test with test clocks that will help see how the subscription will play out https://stripe.com/docs/api/test_clocks

3. One of these should help
   https://stripe.com/docs/api/subscriptions/create#create_subscription-backdate_start_date
   https://stripe.com/docs/billing/subscriptions/subscription-schedules/use-cases#backdating-subscription

[final stream]

Ok thank you very much
Will start working based on these docs, if you will close the thread but please don't delete it so I can take it as a reference @sand hull