<a id="legacy-billing-reference"></a>

# Legacy Billing Reference for Confluent Cloud

This page documents legacy Confluent Cloud billing models and API response formats
that applied to organizations created before their respective cutover dates.
If your organization was created after the applicable date, this content
doesn’t apply to you; see [Billing Dimensions in Confluent Cloud](billing-dimensions.md#billing-dimensions) or
[Retrieve Invoices and Costs in Confluent Cloud](invoices-and-costs.md#cloud-billing-invoices-costs) instead.

<a id="legacy-billing-basic-standard"></a>

## Legacy billing model for Basic and Standard clusters

Beginning April 16, 2024, the pricing model for Basic and
Standard clusters uses [eCKUs](billing-dimensions.md#e-cku-definition) instead of
Base and Partitions. These changes are only applicable to Confluent Cloud
organizations created on or after April 16, 2024. All organizations created
before this date are not affected and continue to use their existing cluster
pricing model and limits, described in the following tables.

**Basic clusters**

The following table summarizes the billing dimensions for Basic
clusters. The following sections contain more details for some of the billing
dimensions.

| Dimension                                                                         | Unit of measure                       |
|-----------------------------------------------------------------------------------|---------------------------------------|
| [Ingress](billing-dimensions.md#ingress-egress-billing)                           | Cost per GB written per hour          |
| [Egress](billing-dimensions.md#ingress-egress-billing)                            | Cost per GB read per hour             |
| [Storage](billing-dimensions.md#storage-billing)                                  | Cost per GB stored per hour           |
| [Partitions](billing-dimensions.md#partition-billing)                             | Cost per partition per hour           |
| [Managed connectors and custom connectors](billing-dimensions.md#connect-billing) | Cost per task per hour and throughput |
| [ksqlDB](billing-dimensions.md#ksqldb-billing)                                    | Cost per CSU                          |
| [Cluster Linking](billing-dimensions.md#cloud-cluster-linking-billing-dimensions) | Cost per hour and per GB transferred  |

**Standard clusters**

The following table summarizes the billing dimensions for Standard
clusters. The following sections contain more details for some of the billing
dimensions.

| Dimension                                                                         | Unit of measure                       |
|-----------------------------------------------------------------------------------|---------------------------------------|
| Base price                                                                        | Cost per hour                         |
| [Ingress](billing-dimensions.md#ingress-egress-billing)                           | Cost per GB written per hour          |
| [Egress](billing-dimensions.md#ingress-egress-billing)                            | Cost per GB read per hour             |
| [Storage](billing-dimensions.md#storage-billing)                                  | Cost per GB stored per hour           |
| [Partitions](billing-dimensions.md#partition-billing)                             | Cost per partition per hour           |
| [Managed connectors and custom connectors](billing-dimensions.md#connect-billing) | Cost per task per hour and throughput |
| [ksqlDB](billing-dimensions.md#ksqldb-billing)                                    | Cost per CSU                          |
| [Cluster Linking](billing-dimensions.md#cloud-cluster-linking-billing-dimensions) | Cost per hour and per GB transferred  |
| [Connector events and audit log](billing-dimensions.md#audit-log-billing)         | Cost per GB of data read              |

If you have any questions, create a support request through the
[Confluent Cloud Support Portal](https://support.confluent.io/), or reach
out to your account team.

<a id="legacy-costs-api-response"></a>

## Legacy Costs API response format

Costs API responses for Confluent Cloud organizations created before May 15, 2024
use a different response format than organizations created on or after that
date. If your organization was created before May 15, 2024, the `GET
/billing/v1/costs` request described in [Retrieve costs for a range of dates](invoices-and-costs.md#costs-api) returns a response
in this format instead:

**Response**

Highlighted lines show the range of dates from your request and total
costs.

```json
{
   "api_version": "v1",
   "kind": "CostList",
   "metadata": {
      "first": "https://api.confluent.cloud/billing/v1/costs",
      "last": "https://api.confluent.cloud/billing/v1/costs?page_token=bcAOehAY8F16YD84Z1wT",
      "prev": "https://api.confluent.cloud/billing/v1/costs?page_token=YIXRY97wWYmwzrax4dld",
      "next": "https://api.confluent.cloud/billing/v1/costs?page_token=UvmDWOB1iwfAIBPj6EYb",
      "total_size": 123
   },
   "data": [
      {
      "api_version": "v1",
      "kind": "Cost",
      "id": "dlz-f3a90de",
      "metadata": {
         "self": "https://api.confluent.cloud/billing/v1/costs/c-12345",
         "resource_name": "crn://confluent.cloud/organization=9bb441c4-edef-46ac-8a41-c49e44a3fd9a/cost=c-12345",
         "created_at": "2006-01-02T15:04:05-07:00",
         "updated_at": "2006-01-02T15:04:05-07:00",
         "deleted_at": "2006-01-02T15:04:05-07:00"
      },
      "start_date": "2022-10-12",
      "end_date": "2022-10-15",
      "granularity": "DAILY",
      "network_access_type": "INTERNET",
      "product": "KAFKA",
      "line_type": "KAFKA_NUM_CKUS",
      "resource_name": "prod_cluster_1",
      "price": 1.5,
      "unit": "GB",
      "quantity": 99.95,
      "original_amount": 99.95,
      "discount_amount": 20.95,
      "amount": 79,
      "environment": {
         "id": "env-a12b34",
         "environment": "string",
         "related": "https://api.confluent.cloud/v2/environments/env-a12b34",
         "resource_name": "https://api.confluent.cloud/organization=9bb441c4-edef-46ac-8a41-c49e44a3fd9a/environment=env-a12b34"
      },
      "resource": {
         "id": "lkc-c29js0",
         "environment": "string",
         "related": "https://api.confluent.cloud/cmk/v2/clusters/lkc-c29js0",
         "resource_name": "https://api.confluent.cloud/organization=9bb441c4-edef-46ac-8a41-c49e44a3fd9a/environment=env-abc123/cloud-cluster=lkc-c29js0",
         "api_version": "string",
         "kind": "string"
      }
      }
   ]
}
```

For more information, see
[Costs API](https://docs.confluent.io/cloud/current/ccloud/costs-billing-v-1/).