> ## Documentation Index
> Fetch the complete documentation index at: https://docs.fluz.app/llms.txt
> Use this file to discover all available pages before exploring further.
# Transfer Between Spend Accounts
Move money between two of your own Fluz **spend accounts** — withdrawing from a source spend account and depositing into a destination spend account in a single operation, using the `transferInternalBalance` mutation.
**This transfers between your own spend accounts.**
A spend account is a cash balance account (the `UserCashBalance` type). This mutation moves funds from one of your spend accounts to another. To send funds to a **different Fluz user**, use [Transfer to Another Fluz Account](/features/transfer-to-another-fluz-wallet) instead.
***
## Transfer Funds Between Spend Accounts
To move funds from one spend account to another, use the `transferInternalBalance` mutation. It takes a `TransferInternalBalanceInput` input object identifying the source spend account, the destination spend account, and the amount.
### TransferInternalBalanceInput
| Field | Type | Required | Description |
| ---------------------------- | ------- | -------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------- |
| amount | Float! | Yes | The amount to transfer from the source spend account to the destination spend account. |
| idempotencyKey | String! | Yes | A unique client-generated string to ensure idempotent request processing. If the same key is submitted multiple times, only the first request is processed. |
| sourceUserCashBalanceId | UUID! | Yes | The spend account to withdraw funds **from**. |
| destinationUserCashBalanceId | UUID! | Yes | The spend account to deposit funds **into**. |
### Both IDs must be your own spend accounts.
Use [Get Spend Accounts](/features/get-spend-accounts) to look up the `userCashBalanceId` for each spend account. The source and destination must be two different spend accounts, and the source must have enough available balance to cover the transfer.
### Sample Request
GraphQL
```text theme={null}
mutation transferInternalBalance($input: TransferInternalBalanceInput!) {
transferInternalBalance(input: $input) {
cashBalanceDeposit {
cashBalanceDepositId
depositDisplayId
depositAmount
depositFee
bankAccountId
transactionDate
clearedDate
status
expectedClearedDate
cashBalanceDepositType
cashBalanceSettlements {
cashBalanceSettlementId
cashBalanceDepositId
availabilityType
status
}
}
withdraw {
withdrawId
amount
processingFee
chargedFee
status
displayStatus
withdrawSource
submissionDate
createdAt
updatedAt
transactionLogId
externalTransactionId
payoutId
emailAddress
bankAccountId
userCashBalanceId
seatId
}
}
}
```
### Example Input
In this example, \$6.00 moves from the source spend account into the destination spend account.
JSON
```text theme={null}
{
"idempotencyKey": "1f1df3e7-5d43-4e3d-83de-31922d4aefb7",
"amount": 6.00,
"sourceUserCashBalanceId": "6d1b4b19-deef-42f5-80d7-ec34804ce090",
"destinationUserCashBalanceId": "bb584e49-d030-4a6e-a5a9-1c34368cbaed"
}
```
### Sample Response
***
## Understanding the Response
An internal transfer is recorded as two linked movements: a **withdraw** from the source spend account and a **deposit** into the destination spend account. The response returns both.
| Field Name | Type | Description |
| ------------------ | ------------------ | ---------------------------------------------------- |
| cashBalanceDeposit | CashBalanceDeposit | The deposit made into the destination spend account. |
| withdraw | Withdraw | The withdrawal taken from the source spend account. |
### cashBalanceDeposit
The `cashBalanceDeposit` object contains details about the deposit into the destination spend account.
| Field Name | Type | Description |
| ---------------------- | ------------------------- | ---------------------------------------------------------------------------------------------------- |
| cashBalanceDepositId | UUID! | Unique identifier for the cash balance deposit. |
| depositDisplayId | String! | Display identifier for the deposit, intended for user-facing purposes. |
| depositAmount | String! | The amount of the deposit. |
| depositFee | String | Fee associated with the deposit, if applicable. |
| bankCardId | UUID | Identifier of the bank card used for the deposit. |
| bankAccountId | UUID | Identifier of the bank account used for the deposit. |
| paypalVaultId | UUID | Identifier of the PayPal vault used for the deposit. |
| transactionDate | DateTime! | Date and time when the transaction was made. |
| clearedDate | DateTime | Date and time when the deposit cleared, if applicable. |
| status | CashBalanceDepositStatus! | Current status of the deposit. |
| expectedClearedDate | DateTime! | Expected date and time for the deposit to clear. |
| cashBalanceDepositType | CashBalanceDepositType! | Type of the cash balance deposit, including CASH\_BALANCE, GIFT\_CARD\_PREPAYMENT, RESERVE\_BALANCE. |
| cashBalanceSettlements | \[CashBalanceSettlement] | Settlement time details for the deposit, including status and type. |
### withdraw
The `withdraw` object contains details about the withdrawal from the source spend account.
| Field Name | Type | Description |
| --------------------- | --------------- | ----------------------------------------------------------------- |
| withdrawId | UUID! | Unique identifier for the withdrawal. |
| amount | String! | The amount withdrawn. |
| processingFee | String! | Fee charged for processing the withdrawal. |
| chargedFee | String! | Fee charged to the user for the withdrawal. |
| status | String! | Internal status of the withdrawal. |
| displayStatus | String! | User-friendly display status of the withdrawal. |
| withdrawSource | WithdrawSource! | The source balance from which funds were withdrawn. |
| submissionDate | DateTime! | Date and time when the withdrawal was submitted. |
| createdAt | DateTime! | Date and time when the withdrawal was created. |
| updatedAt | DateTime! | Date and time when the withdrawal was last updated. |
| transactionLogId | UUID | Identifier of the associated transaction log. |
| externalTransactionId | String | External transaction identifier from payment gateway (for ACH). |
| payoutId | String | Payout identifier from payment gateway (for PayPal/Venmo). |
| emailAddress | String | Email address associated with the withdrawal. |
| bankAccountId | UUID | Identifier of the bank account used (if applicable). |
| userCashBalanceId | UUID | Identifier of the source spend account funds were withdrawn from. |
| seatId | UUID | The seat identifier associated with the account. |
**Authorization required**
This mutation requires the `MAKE_INTERNAL_TRANSFER` scope. Ensure your access token has been granted this scope before attempting an internal transfer between spend accounts.