#-vineet_best-practices
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velvet oriole
all i want to get is a dependable way to get the total amount user requested to create the paymentIntent / checkout session with. doesn't matter if the user was charged $0, any amount between 0 and the amount he created with or the actual amount he created with.
crimson bough
Hi there,
just to clarify, you want the amount of all items before taxes and discounts? That would be the amount_subtotal property on the Checkout Session object https://docs.stripe.com/api/checkout/sessions/object?api-version=2025-09-30.clover#checkout_session_object-amount_subtotal
velvet oriole
according to types, it can be number | null
so is that a dependable way to get the subtotal ?
crimson bough
Yes it can be null, for example a Checkkout Session with a $0 dollar product or trial
velvet oriole
Yes it can be null, for example a Checkkout Session with a $0 dollar product or ...
which other cases will trigger this
?
crimson bough
so is that a dependable way to get the subtotal ?
I can't think of other situations other than the $0 dollar products or free trials at the moment.
If a user checks out with products/services that have a price >$0 dollar, it will be reflected in the amount_subtotal property.
velvet oriole
okay
crimson bough
So listening to the checkout.session.completed webhook event and inspecting the amount_subtotal makes the most sense in your case.
velvet oriole
0kay got it
also when creating coupons and have the duration set to once, in test mode i can redeem it many time. will it differ in behaviour on prod ?
@crimson bough
crimson bough
When duration is set to once, it applies to the first charge from a subscription with this coupon applied. That means it can be reused. If you want to limit how many times a coupon in total (across all customers) can be used you would need to set the max_redemption parameter when creating the coupon. https://docs.stripe.com/api/coupons/object#coupon_object-max_redemptions