> For the complete documentation index, see [llms.txt](https://docs.txn.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.txn.io/accounts/creating-subaccount.md).

# Creating subaccount

<mark style="color:green;">`POST`</mark> `/api/public/v1/accounts/:account_id/subaccounts`

Creates a subaccount under the specified master account. The subaccount inherits the master account's currency.

**Headers**

| Name          | Value                      |
| ------------- | -------------------------- |
| Content-Type  | `application/vnd.api+json` |
| Authorization | `Bearer <api_key>`         |

**Path Parameters**

| Name        | Type   | Description        |
| ----------- | ------ | ------------------ |
| account\_id | string | Master account ID. |

**Body**

<table><thead><tr><th>Name</th><th width="116">Type</th><th>Description</th></tr></thead><tbody><tr><td>data</td><td>object</td><td>Request data object.</td></tr><tr><td>data.type</td><td>string</td><td>Resource type. Always <code>accounts</code>.</td></tr><tr><td>data.attributes</td><td>object</td><td>Subaccount attributes.</td></tr><tr><td>data.attributes.label</td><td>string</td><td>Subaccount label. Use a human-readable value so you can recognize it later.</td></tr></tbody></table>

**Request JSON**

```json
{
  "data": {
    "type": "accounts",
    "attributes": {
      "label": "Sub-account Adam Goodman"
    }
  }
}
```

**Response**

{% tabs %}
{% tab title="HTTP 200" %}

```json
{
  "data": {
    "id": "dc9c1c6e-3fa6-4fce-8c5f-714dfcecf3ee",
    "type": "accounts",
    "attributes": {
      "master": false,
      "currencyCode": "USDT",
      "label": "Sub-account Adam Goodman",
      "bankReference": "BDR7013714686525702",
      "balance": "0.000000",
      "totalBalance": "0.000000",
      "bankWithdrawalAvailable": false,
      "currencyType": "crypto"
    },
    "relationships": {
      "company": {
        "meta": {
          "included": false
        }
      },
      "networks": {
        "meta": {
          "included": false
        }
      }
    }
  },
  "meta": {},
  "jsonapi": {
    "version": "1.0"
  }
}
```

{% endtab %}

{% tab title="HTTP 404" %}

```json
{
  "errors": [
    {
      "status": 404,
      "title": "Record not found",
      "code": "account_not_found",
      "detail": "Account not found"
    }
  ]
}
```

The master account in the path does not exist.
{% endtab %}
{% endtabs %}

**Response Body**

| Name                                      | Type    | Description                                                     |
| ----------------------------------------- | ------- | --------------------------------------------------------------- |
| `data.id`                                 | string  | Subaccount ID.                                                  |
| `data.type`                               | string  | Entity type returned. Always `accounts`.                        |
| `data.attributes.master`                  | boolean | Always `false` for a subaccount.                                |
| `data.attributes.currencyCode`            | string  | Currency code, inherited from the master account.               |
| `data.attributes.label`                   | string  | Subaccount label, as set in the request.                        |
| `data.attributes.bankReference`           | string  | Unique bank deposit reference assigned to the subaccount.       |
| `data.attributes.balance`                 | string  | Subaccount balance. A new subaccount starts at zero.            |
| `data.attributes.totalBalance`            | string  | Matches `balance` for subaccounts.                              |
| `data.attributes.bankWithdrawalAvailable` | boolean | If `true`, bank withdrawals can be initiated from this account. |
| `data.attributes.currencyType`            | string  | Currency type. Either `fiat` or `crypto`.                       |


---

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