elBR

[echo mist]

So, for next recurring charges the payment method would lways be the customer default payment method

[obtuse fiber]

There is a parameter to set the PaymentMethod to be the Subscription's default_payment_method: https://stripe.com/docs/api/subscriptions/create?lang=ruby#create_subscription-payment_settings-save_default_payment_method

But if you are asking about set it as the customer's default_payment_method, then unfortunately no, you may need to listen to webhook to set it yourself

ie. listen to when the Payment succeeded and set to customer.invoice_settings.default_payment_method

[echo mist]

if I don't set the default_payment_method on subscription, what will be the payment method for next charges?

and what will be in case user does not have any default payment method saved?

[obtuse fiber]

When the times comes the Subscription will try to look at its own default_payment_method first, then default_source, then customer's invoice_settings.default_payment_method then customer.default_source

[last timber]

and what if there none of them?

[obtuse fiber]

The Subscription will fail to charge, change to past_due

https://stripe.com/docs/billing/subscriptions/overview#build-your-own-handling-for-recurring-charge-failures

[last timber]

what is the difference between default payment method and default source

[obtuse fiber]

default_source is legacy parameters and exists for old merchants.

Are you at the same team with @echo mist ?