subscription.plan_changed

Generated from COPE public event contracts. Do not edit this page by hand.

Use this event to follow a subscription that changed plan rather than price — the sibling of subscription.amount_changed, which announces a new amount on the SAME plan. The switch is applied in place with no proration; the new plan’s amount bills at the existing cycle boundary, and the currency does not move. A plan on another cadence starts it at that same boundary: the period already paid for is kept, and nothing is charged until then. new_plan is the plan the subscription now runs on; old_plan is the plan it moved off, and null when no recorded fact names that plan. effective_at is a prediction on the same terms as subscription.amount_changed. The body names the business, the order, the line item and the subscription, each as object and id; store subscription.id to match later events on the same subscription, and read everything else about them through the API.

Delivery Contract

Field	Value
Encoding	JSON: `id`, `type`, `version`, `source`, `created_at`, `data`
Delivery	At least once
Idempotency	Deduplicate on `id`: every retry and replay of this event repeats it, and `X-Cope-Event-Id` carries it.
Source	`cope.subscription`
Category	Subscriptions
Availability	Available in the public webhook reference.
Schema title	subscription.plan_changed webhook body
Schema ID	`https://schemas.cope.com/webhooks/subscription.plan_changed/v1`

Payload Fields

Field	Required	Type	Allowed Values	Description
`business`	no	`object`	-	The business that sold the subscription.
`currency`	yes	`string`	-	ISO 4217 currency code of both amounts.
`effective_at`	yes	`string	null`	-	The renewal the new amount first bills. A prediction taken at the time of the change; the charge itself is the confirmation. Null when no renewal date is known.
`line_item`	no	`object`	-	The order line the subscription belongs to.
`new_plan`	no	`object`	-	The plan the subscription now runs on.
`new_recurring_amount_cents`	yes	`integer`	-	What the buyer is billed per cycle from effective_at, in minor units, quantity included.
`old_plan`	no	`object	null`	-	The plan the subscription moved off. Null when no recorded fact names that plan — for example, terms sold through an offer, a plan since deleted, or terms from before plans were recorded.
`old_recurring_amount_cents`	yes	`integer`	-	What the buyer was billed per cycle before the change, in minor units, quantity included.
`order`	no	`object`	-	The order the subscription was bought on.
`subscription`	no	`object`	-	The subscription. Absent when the event names no subscription id of the right shape.

Example delivery

{
  "created_at": "2026-04-20T11:02:46Z",
  "data": {
    "business": {
      "id": "biz_g7-Jq2PxT_4mRvNa",
      "object": "business"
    },
    "currency": "EUR",
    "effective_at": "2026-05-01T08:00:00Z",
    "line_item": {
      "id": "li_4nHs8QwZ2pLk7XcY",
      "object": "line_item"
    },
    "new_plan": {
      "id": "plan_Yr8K2vPd",
      "object": "payment_plan"
    },
    "new_recurring_amount_cents": 9900,
    "old_plan": {
      "id": "plan_Hn4W7sQe",
      "object": "payment_plan"
    },
    "old_recurring_amount_cents": 5900,
    "order": {
      "id": "ord_V7kP2mQx9RtL",
      "object": "order"
    },
    "subscription": {
      "id": "ps_Gm3Tq8ZrW1bN",
      "object": "subscription"
    }
  },
  "id": "6e0b4d8a-7f2c-4b19-8d36-1a9c5e7f2b40",
  "source": "cope.subscription",
  "type": "subscription.plan_changed",
  "version": "v1"
}

Compatibility

Fields may be added within the same major version. Removing or changing the meaning of a documented field requires a new event version.

​subscription.plan_changed

​Delivery Contract

​Payload Fields

​Example delivery

​Compatibility

subscription.plan_changed

Delivery Contract

Payload Fields

Example delivery

Compatibility