What happens when I change the price of a subscription after having issued an advance invoice?

Problem Statement

This article explains what happens when you change a subscription (price, plan, addon, coupon) that has an advance invoice for the current period, and why customers may appear to be billed twice.

Solution

When you change a subscription that has an advance invoice (e.g., override price, change plan/addon, or change coupon), the advance charges are refunded as credits and a credit note is created for that invoice.

Flow

1. Subscription has an advance invoice.
2. You make changes (add/remove addon, change coupon, change plan price).
3. Advance charges are refunded as credits; a credit note is created.
4. You can Preview the changes before confirming.
5. Credits appear as Refundable Credits in the subscription summary.

Watch this video for a walkthrough.