Which change is it?
A
draft subscription is different: nothing is live, so you can change anything freely, and delete it with DELETE /subscriptions/{id}.
Metadata edits via the API
PATCH /subscriptions/{id} patches only the fields you send. It never modifies the priced item set.
null value. A subscription.updated webhook fires on success.
Editing in the dashboard
1
Open the editor
On the Subscription Details page click Edit in the top-right corner.

2
Add products
In the Products section click Add Product, search, tick the products you want, and click Add Product(s). Set a price for each new line.

3
Remove products
Click the Delete icon on the line and confirm with Remove.

4
Change pricing
Adjust the amount, tiers or pricing model on any line. On an active subscription, pricing changes are collected into a new version rather than applied in place.
5
Choose when it takes effect
When you save changes to an active subscription you choose the version start:
- From start of a billing cycle — the change lands on a cycle boundary. Nothing is prorated. Best for metered products and scheduled changes.
- Mid-cycle — the change lands on the date you pick inside the current cycle and a prorated invoice is generated for the price difference. See Proration.
GET /subscriptions/{id}/billing-dates.6
Add a note and save
Add a note describing the change; it is stored on the version as its description and shows in the version history. Click Save Changes.
If an approval rule matches the change, it waits for approval before it is published.

Next steps
Amendments
Add, remove and re-price products on an active subscription.
Versioning
How drafts, published versions and effective dates work.
Proration
What a mid-cycle change costs.
Updating a Subscription (API)
Request bodies for every kind of change.