> ## Documentation Index
> Fetch the complete documentation index at: https://docs.kalshi.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Transfer Between Subaccounts

> Transfers funds between the authenticated user's subaccounts. Use 0 for the primary account, or 1-63 for numbered subaccounts. Set exchange_index to apply the transfer on a specific exchange shard (defaults to 0).



## OpenAPI

````yaml /openapi.yaml post /portfolio/subaccounts/transfer
openapi: 3.0.0
info:
  title: Kalshi Trade API Manual Endpoints
  version: 3.34.0
  description: >-
    Manually defined OpenAPI spec for endpoints being migrated to spec-first
    approach
servers:
  - url: https://external-api.kalshi.com/trade-api/v2
    description: Production Trade API server
  - url: https://api.elections.kalshi.com/trade-api/v2
    description: Production shared API server, also supported
  - url: https://external-api.demo.kalshi.co/trade-api/v2
    description: Demo Trade API server
  - url: https://demo-api.kalshi.co/trade-api/v2
    description: Demo shared API server, also supported
security: []
tags:
  - name: api-keys
    description: API key management endpoints
  - name: orders
    description: Order management endpoints
  - name: order-groups
    description: Order group management endpoints
  - name: portfolio
    description: Portfolio and balance information endpoints
  - name: communications
    description: Request-for-quote (RFQ) endpoints
  - name: multivariate
    description: Multivariate event collection endpoints
  - name: exchange
    description: Exchange status and information endpoints
  - name: live-data
    description: Live data endpoints
  - name: markets
    description: Market data endpoints
  - name: milestone
    description: Milestone endpoints
  - name: search
    description: Search and filtering endpoints
  - name: incentive-programs
    description: Incentive program endpoints
  - name: fcm
    description: FCM member specific endpoints
  - name: events
    description: Event endpoints
  - name: structured-targets
    description: Structured targets endpoints
paths:
  /portfolio/subaccounts/transfer:
    post:
      tags:
        - portfolio
      summary: Transfer Between Subaccounts
      description: >-
        Transfers funds between the authenticated user's subaccounts. Use 0 for
        the primary account, or 1-63 for numbered subaccounts. Set
        exchange_index to apply the transfer on a specific exchange shard
        (defaults to 0).
      operationId: ApplySubaccountTransfer
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/ApplySubaccountTransferRequest'
      responses:
        '200':
          description: Transfer completed successfully
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApplySubaccountTransferResponse'
        '400':
          $ref: '#/components/responses/BadRequestError'
        '401':
          $ref: '#/components/responses/UnauthorizedError'
        '500':
          $ref: '#/components/responses/InternalServerError'
      security:
        - kalshiAccessKey: []
          kalshiAccessSignature: []
          kalshiAccessTimestamp: []
components:
  schemas:
    ApplySubaccountTransferRequest:
      type: object
      required:
        - client_transfer_id
        - from_subaccount
        - to_subaccount
        - amount_cents
      properties:
        client_transfer_id:
          type: string
          format: uuid
          description: Unique client-provided transfer ID for idempotency.
          x-oapi-codegen-extra-tags:
            validate: required
        from_subaccount:
          type: integer
          description: >-
            Source subaccount number (0 for primary, 1-63 for numbered
            subaccounts).
        to_subaccount:
          type: integer
          description: >-
            Destination subaccount number (0 for primary, 1-63 for numbered
            subaccounts).
        amount_cents:
          type: integer
          format: int64
          description: Amount to transfer in cents.
        exchange_index:
          allOf:
            - $ref: '#/components/schemas/ExchangeIndex'
          description: Identifier for an exchange shard. Defaults to 0 if unspecified.
          x-go-type-skip-optional-pointer: true
          x-oapi-codegen-extra-tags:
            validate: gte=0
    ApplySubaccountTransferResponse:
      type: object
      description: Empty response indicating successful transfer.
    ExchangeIndex:
      type: integer
      description: Identifier for an exchange shard.
      example: 0
    ErrorResponse:
      type: object
      properties:
        code:
          type: string
          description: Error code
        message:
          type: string
          description: Human-readable error message
        details:
          type: string
          description: Additional details about the error, if available
  responses:
    BadRequestError:
      description: Bad request - invalid input
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    UnauthorizedError:
      description: Unauthorized - authentication required
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    InternalServerError:
      description: Internal server error
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
  securitySchemes:
    kalshiAccessKey:
      type: apiKey
      in: header
      name: KALSHI-ACCESS-KEY
      description: Your API key ID
    kalshiAccessSignature:
      type: apiKey
      in: header
      name: KALSHI-ACCESS-SIGNATURE
      description: >-
        Base64 signature of the pre-sign text (timestamp + method + path) made
        with the API key's algorithm - RSA-PSS with SHA-256 for RSA keys,
        Ed25519 for Ed25519 keys
    kalshiAccessTimestamp:
      type: apiKey
      in: header
      name: KALSHI-ACCESS-TIMESTAMP
      description: Request timestamp in milliseconds

````

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