決済
Plan Change Handling
Upgrades, downgrades, and proration handling for SaaS subscription plans. Use when: plan change handling, subscription upgrade, subscription downgrade, plan upgrade stripe, plan downgrade stripe, proration stripe, subscription proration, immediate upgrade, end of period downgrade, plan change proration, stripe subscription update price, subscription item update, proration behavior stripe, proration credit, upgrade billing, downgrade billing, plan tier change, switch plan, change subscription plan, seat change billing, plan change webhook, subscription schedule stripe, prorated invoice, change plan immediately, change plan next period.