#disconsented-subscriptions
half adder
A reverse of the longer billing cycle == discount idea essentially
slim root
if it's a one time off, you can create an invoice item : https://stripe.com/docs/api/invoiceitems/create
half adder
What about for an ongoing subscription?
I'm assuming the answer is price for the shortest cycle and apply discounts as relevant
brisk timber
You can update the subscription by adding the new price in the subscription's items hash https://stripe.com/docs/api/subscriptions/update#update_subscription-items
half adder
Sorry I mean I want the charge to apply for the lifetime of the subscription
brisk timber
Yup, once you added in the new price in the subscription, it'll be included in the future invoices.
half adder
Ah so add a new price to handle it, hmm okay, then how do I model the price then?
brisk timber
Sure, Stripe offers many pricing models for subscription. You can find them here https://stripe.com/docs/products-prices/pricing-models
half adder
I've got that open at the moment, I'm having trouble finding a percentage price option.
brisk timber
What do you mean by percentage price option?
half adder
I'd want the surcharge to be a percentage of the fee rather than a fixed amount
Most discounts based on billing cycles are percentage, hence the question for a negative coupon
I guess a ""Tax Rate"" would work?
brisk timber
Are you collecting the surcharge for tax purpose?
half adder
No
brisk timber
Then I won't recommend you using tax rate.
half adder
Well, is this even possible? As far as I can tell, all prices are essentially fixed prices the only things that I see reference via the documentation for "percent" reference coupons, connect or tax rates.
brisk timber
You can listen to the invoice.created events. When this event happens, you should calculate the surcharge and create a invoiceItem https://stripe.com/docs/api/invoiceitems/create
half adder
So it cannot be a percentage and instead needs to be calculated?
brisk timber
The current pricing models doesn't provide this feature so you need to calculate it by yourself.
half adder
Sweet as, thanks.