Create and configure subaccounts

This section covers:

What a subaccount is and how it works
Balance types and transaction types
Billing and fee configuration
Integration steps for subaccount creation

What is a subaccount?

A subaccount is an end-client account tied to one or more beneficial owners (e.g., institutional taxable account, joint account, Roth IRA). It represents one account on the ledger. Each wealth manager has their own ledger instance with two types of subaccounts: 1. End client funds — Track end-client positions and transactions. 2. Anchorage Digital operational funds — Ensure the ledger remains balanced. Include:

Operational subaccount	Purpose
Network transaction fees for org	Covers on-chain fees. Does not impact end-client ledger balances.
FBO customer fees for org	Accrues funds for subaccount and custody fees. Only impacted during the billing cycle.
Payables and receivables for org	Holds funds for settling trades with liquidity providers.
Unassigned funds for org	Holds funds not yet assigned to a subaccount (e.g., in-kind deposits with missing attribution).

Each end client may have one or many subaccounts assigned to their customerId. Funds within a subaccount can be rebalanced across other subaccounts for the same end client, provided they are settled.

Balances

Each subaccount tracks three balance types:

Balance	Description
`availableForTrading`	Balance available to trade — may include unsettled funds.
`availableForWithdrawal`	Settled funds available to withdraw, less any unsettled trades.
`totalBalance`	Balance after all settlements complete.

Subaccount transaction types

Transaction type	Status values
`DEPOSIT`	`PENDING` — queued, funds on hold until `POSTED` or `CANCELED`.
`WITHDRAWAL`	`POSTED` — completed and confirmed on blockchain.
`TRADE`	`CANCELED` — funds not transferred.
`MANAGEMENT_FEE`
`ADVISORY_FEE`
`MODEL_FEE`
`CUSTODY_FEE`

Billing and fee configuration

Plan your billing and fee strategy before onboarding clients.

Billing methods

Method	Description
Automated billing	Fees configured at subaccount creation. Billed automatically each cycle.
Manual billing	Submitted by the wealth manager via the manual billing API endpoint before the 10th business day.

Fee model

Model	Description
Bundled	Single “management fee” line item on the PC statement. Anchorage Digital’s custody fee is deducted from the overall fee charged to the wealth manager.
Fully disclosed (unbundled)	Each fee type (custody, management, advisory, model) appears as a separate line item on the PC statement.

Fee types

Fee type	Details
`CUSTODY_FEE`	Configured by Anchorage Digital during wealth manager onboarding. Rate may change based on total AUC per agreed commercial terms. Not configurable via API. Calculated from end-of-day USD value averaged over the fee period.
`MANAGEMENT_FEE`	Fee charged by the wealth manager for managing client assets (typically 1–2% of AUM with minimums).
`ADVISORY_FEE`	Configured via API at subaccount creation. Used for third-party wealth manager fees; otherwise set to `0`.
`MODEL_FEE`	Configured via API at subaccount creation. Used for model fees.

Fee visibility — `isBillable`

Value	Behavior
`isBillable: true`	Fee accrues daily AND is billed to the end-client subaccount monthly. Shows as a separate line item on statements. Fees appear on the 1st of the month. Custody fee defaults to `true` for unbundled billing models.
`isBillable: false`	Fee accrues daily but is NOT billed to the subaccount monthly. Does not appear on statements. Accrued balances are available via API. Useful for tracking internal fee distributions from a single management fee remittance.

Fee accruals

Each subaccount includes an accruedFees section showing estimated fees based on average AUC — not actual point-in-time fees.

accruedValue represents the average fee accrued based on days elapsed and average AUC. It is not the actual fees charged based on prior day accruals, and should not be used to display mid-month “performance net of fees” estimates.

Key fields in accruedFees:

Field	Description
`startPeriod`	Billing month start date.
`endPeriod`	Billing month end date.
`accruedValue`	Accrued fee value to date for the billing period.
`rate`	Fee rate as a decimal (e.g., `0.01` = 1%).
`type`	Fee type corresponding to the `accruedFee` object.
`totalBalanceInUSD`	Most recent AUC balance in USD used to calculate accrued fees.
`state`	`ONGOING` — still accruing. `DONE` — billing period closed.

Example subaccount with fee accruals

{
  "createdAt": "2025-02-01T19:11:06.390Z",
  "customerId": "9bcbbb3136356ff85670085f64cfb4f53419a94277261be0094c4d97de71a4yb",
  "externalSubaccountId": "1A-13579-Doe",
  "fees": [
    { "isBillable": true, "rate": 0, "startDate": "2024-08-02", "type": "ADVISORY" },
    { "isBillable": false, "rate": 0.0025, "startDate": "2024-11-20", "type": "CUSTODY" },
    { "isBillable": true, "rate": 0, "startDate": "2024-08-02", "type": "MANAGEMENT" },
    { "isBillable": true, "rate": 0, "startDate": "2024-08-02", "type": "MODEL" }
  ],
  "name": "1A-13579-Doe",
  "subaccountId": "99fc9d84-4843-4a2c-95cc-1d90385c7955",
  "accruedFees": [
    {
      "accruedValue": "2982.05",
      "endPeriod": "2025-01-31",
      "rate": 0.351,
      "startPeriod": "2025-01-01",
      "state": "DONE",
      "totalBalanceInUSD": "100032.1",
      "type": "CUSTODY"
    },
    {
      "accruedValue": "1731.5",
      "endPeriod": "2025-02-18",
      "rate": 0.351,
      "startPeriod": "2025-02-01",
      "state": "ONGOING",
      "totalBalanceInUSD": "100031.22",
      "type": "ADVISORY"
    }
  ],
  "balances": [
    { "assetType": "BTC", "availableForTrading": "0.00018915", "availableForWithdrawal": "0.00018915", "totalBalance": "0.00032102" },
    { "assetType": "ETH", "availableForTrading": "0.19400093", "availableForWithdrawal": "0", "totalBalance": "0" },
    { "assetType": "USD", "availableForTrading": "87676.46", "availableForWithdrawal": "87676.46", "totalBalance": "100000" }
  ]
}

Fee calculation

accruedValue = (AvgAUC × feeRate) × (numberOfDays / 365)Avg AUC is calculated from totalBalance. This is an estimate — do not use to calculate performance net of fees.

Billing lifecycle

Month 1, day 1 — Billing period starts. accruedFee begins calculating end of day. state: ONGOING.
Month 1, days 2–30 — accruedFee reflects daily accrual from day 2.
Month 1, last day — Billing period closes. state: DONE.
Month 2, day 1 — Fee transaction appears on the ledger at 8:00 AM ET as PENDING.
Month 2, days 2–9th business day — Billing dispute period. Contact your account point of contact with any questions.
Month 2, 10th business day — Billing finalized. Subaccount transaction updates to POSTED. Fees withdrawn; wealth manager remittance begins. Updates at 8:00 AM ET.

Pro-rated fees apply to subaccounts with mid-month start dates.

Additional billing considerations

Manual billing must be submitted via API before the 10th business day.
Cash management — Keep 3 months of USD in the subaccount to avoid liquidation events that trigger taxable events.
0-rate fees — No accrual or transaction posted if rate is 0.
Negative USD balances — If USD balance goes negative mid-month, it must be offset before the 10th business day.
Rate changes — Anchorage Digital emails end clients when fees with isBillable: true are created or changed.
Fee rate format — Configure as a decimal: 1% = 0.01.

Integration steps: Subaccount creation

Supported account types

Account type	Subtype	End client(s)	Client type
`IRA`	—	1	Individual
`IRA`	`ROLLOVER`	1	Individual
`IRA`	`CONVERSION`	1	Individual
`ROTH`	—	1	Individual
`ROTH`	`ROLLOVER`	1	Individual
`ROTH`	`CONVERSION`	1	Individual
`JOINT`	—	2	Individual
`CUSTODIAL`	—	2	Individual
`INDIVIDUAL_TAXABLE`	—	1	Individual
`INSTITUTIONAL_TAXABLE`	—	1	Institution

Each subaccount requires a signer who can represent the client. The signer can be the end client themselves or another authorized individual.

Expected program signers by account type

Account type	Expected program signers
`IRA`	Linked end client who owns the subaccount
`ROTH`	Linked end client who owns the subaccount
`JOINT`	Both linked end clients who own the subaccount
`CUSTODIAL`	Parent end client, not the child
`INDIVIDUAL_TAXABLE`	Linked end client who owns the subaccount
`INSTITUTIONAL_TAXABLE`	Initial set of named program signers

Step 1: Create a subaccount application

POST /v2/onboarding/subaccounts Key fields:

Field	Description	Required	Type	Restrictions
`legalEntityName`	Legal entity name	Yes	String
`accountType`	Account type	Yes	Enum	`IRA`, `ROTH`, `JOINT`, `CUSTODIAL`, `INDIVIDUAL_TAXABLE`, `INSTITUTIONAL_TAXABLE`
`accountSubtype`	Account subtype	Only for `IRA` or `ROTH`	Enum	`ROLLOVER` or `CONVERSION`
`programSignerGroup`	List of program signers	Yes	Array
`programSignerGroup/programSignerFirstName`	First name	Yes	String
`programSignerGroup/programSignerLastName`	Last name	Yes	String
`programSignerGroup/programSignerEmail`	Email	Yes	String	Valid email
`documentPreferenceAddressDefaultEmail`	Statement delivery email(s)	Yes	String	Comma-separated valid emails
`termsAgreementID`	Terms agreement ID	If T&Cs enabled	String	ID from `/v2/onboarding/agreements/terms`
`beneficiaryGroup`	Beneficiaries	No	Array
`beneficiaryGroup/beneficiaryType`	Type	Yes	Enum	`SPOUSE`, `FAMILY_OR_FRIEND`, `CHARITY`, `TRUST`, `ESTATE`
`beneficiaryGroup/beneficiaryName`	Name	Yes	String
`beneficiaryGroup/beneficiaryAllocation`	Allocation %	Yes, must sum to 100	Number	1–100
`contingencyBeneficiaryGroup`	Contingency beneficiaries	No	Array	Same structure as `beneficiaryGroup`
`fees`	Fee configuration	No	Array
`fees/feeType`	Fee type	Yes	Enum	`ADVISORY`, `MODEL`, `MANAGEMENT`
`fees/feeRate`	Fee rate	No	Number	Decimal 0–1
`fees/feeIsBillable`	Is fee billable?	No	Boolean
`programCustomers`	Linked end clients	Yes	Array
`programCustomers/programCustomerId`	End client ID	Yes	String	`customerId`
`programCustomers/programCustomerRole`	Role	Yes	Enum	`PRIMARY` or `SECONDARY`
`submit`	Submit immediately	No, defaults to `false`	Boolean

Example request

{
  "name": "{{name}}",
  "externalId": "{{externalId}}",
  "submit": true,
  "entries": [
    { "key": "legalEntityName", "value": "SubAccount IRA ROLLOVER" },
    { "key": "accountType", "value": "IRA" },
    { "key": "accountSubtype", "value": "ROLLOVER" },
    { "key": "documentPreferenceAddressDefaultEmail", "value": "kevin.flynn_4@test.com" },
    { "key": "programSignerGroup", "value": [
        { "programSignerFirstName": "Kevin", "programSignerLastName": "Flynn_5", "programSignerEmail": "kevin.flynn_5@test.com" },
        { "programSignerFirstName": "Kevin", "programSignerLastName": "Flynn_6", "programSignerEmail": "kevin.flynn_6@test.com" }
      ]
    },
    { "key": "programCustomers", "value": [
        { "programCustomerId": "{{customerId1}}", "programCustomerRole": "PRIMARY" }
      ]
    },
    { "key": "beneficiaryGroup", "value": [
        { "beneficiaryType": "SPOUSE", "beneficiaryName": "Test beneficiary", "beneficiaryAllocation": "50" },
        { "beneficiaryType": "CHARITY", "beneficiaryName": "Test beneficiary 2", "beneficiaryAllocation": "50" }
      ]
    },
    { "key": "contingencyBeneficiaryGroup", "value": [
        { "beneficiaryType": "FAMILY_OR_FRIEND", "beneficiaryName": "Test beneficiary 3", "beneficiaryAllocation": "25" },
        { "beneficiaryType": "TRUST", "beneficiaryName": "Test beneficiary 4", "beneficiaryAllocation": "75" }
      ]
    },
    { "key": "fees", "value": [
        { "feeType": "ADVISORY", "feeRate": "0.1" },
        { "feeType": "MANAGEMENT", "feeRate": "0.25", "feeIsBillable": true }
      ]
    }
  ]
}

A unique subaccountId is returned for all future references to this subaccount.

Step 2: Check subaccount application status

GET /v2/onboarding/subaccounts/{subaccountId} Errors and missing documents are listed in the errors array of the response.

Example response

{
  "data": {
    "entries": [
      { "key": "programSignerGroup", "value": [
          { "programSignerFirstName": "Kevin", "programSignerLastName": "Flynn_5", "programSignerEmail": "kevin.flynn_5@test.com" },
          { "programSignerFirstName": "Kevin", "programSignerLastName": "Flynn_6", "programSignerEmail": "kevin.flynn_6@test.com" }
        ]
      },
      { "key": "documentPreferenceAddressDefaultEmail", "value": "kevin.flynn_4@test.com" },
      { "key": "accountType", "value": "IRA" },
      { "key": "accountSubtype", "value": "ROLLOVER" },
      { "key": "programCustomers", "value": [
          { "programCustomerId": "43a37de2dcc326579fe9ab3a187c48b786007bd759802dfa04ef1aa35383a273", "programCustomerRole": "PRIMARY" }
        ]
      }
    ],
    "errors": [],
    "externalId": "37c4abc1-b94b-48d7-a41b-c4e4becc865a",
    "name": "SubAccount IRA ROLLOVER 20250407-2",
    "status": "IN_PROGRESS",
    "subaccountId": "4305271f-7c1c-4b72-bb80-82b2e144d19d"
  }
}

Step 3: Submit the application (if `submit: false`)

POST /v2/onboarding/subaccounts/{subaccountId}/submit

Step 4: Check subaccount approval status

GET /v2/subaccounts/customers/accounts?subaccountIds={subaccountId} Status values: PENDING (received, awaiting approval) → OPEN (approved and active). Alternatively, subscribe to the subaccount.opened webhook event for async notification.

Example response (approved)

{
  "data": {
    "applicationId": "6ba46417-66dc-424e-8e68-4fbd2597d993",
    "entries": [
      { "key": "programSignerGroup", "value": [
          { "programSignerFirstName": "Kevin", "programSignerLastName": "Flynn_5", "programSignerEmail": "kevin.flynn_5@test.com" },
          { "programSignerFirstName": "Kevin", "programSignerLastName": "Flynn_6", "programSignerEmail": "kevin.flynn_6@test.com" }
        ]
      },
      { "key": "programCustomers", "value": [
          { "programCustomerId": "43a37de2dcc326579fe9ab3a187c48b786007bd759802dfa04ef1aa35383a273", "programCustomerRole": "PRIMARY" }
        ]
      },
      { "key": "accountSubtype", "value": "ROLLOVER" },
      { "key": "accountType", "value": "IRA" },
      { "key": "beneficiaryGroup", "value": [
          { "beneficiaryAllocation": "50", "beneficiaryName": "Test beneficiary", "beneficiaryRelation": "Primary", "beneficiaryType": "Spouse" },
          { "beneficiaryAllocation": "50", "beneficiaryName": "Test beneficiary 2", "beneficiaryRelation": "Contingency", "beneficiaryType": "Charity" }
        ]
      },
      { "key": "fees", "value": [
          { "feeRate": "0.1", "feeType": "Advisory" },
          { "feeIsBillable": "Yes", "feeRate": "0.25", "feeType": "Management" }
        ]
      },
      { "key": "documentPreferenceAddressDefaultEmail", "value": "gareth.test_3@test.com" },
      { "key": "legalEntityName", "value": "SubAccount IRA ROLLOVER" }
    ],
    "errors": [],
    "status": "COMPLETE"
  }
}

Changelog

Date	Change
June 10, 2025	Updates for new onboarding API payloads and flows
May 1, 2025	Initial version

​What is a subaccount?

​Balances

​Subaccount transaction types

​Billing and fee configuration

​Billing methods

​Fee model

​Fee types

​Fee visibility — isBillable

​Fee accruals

​Fee calculation

​Billing lifecycle

​Additional billing considerations

​Integration steps: Subaccount creation

​Supported account types

​Expected program signers by account type

​Step 1: Create a subaccount application

​Step 2: Check subaccount application status

​Step 3: Submit the application (if submit: false)

​Step 4: Check subaccount approval status

​Changelog

What is a subaccount?

Balances

Subaccount transaction types

Billing and fee configuration

Billing methods

Fee model

Fee types

Fee visibility — `isBillable`

Fee accruals

Fee calculation

Billing lifecycle

Additional billing considerations

Integration steps: Subaccount creation

Supported account types

Expected program signers by account type

Step 1: Create a subaccount application

Step 2: Check subaccount application status

Step 3: Submit the application (if `submit: false`)

Step 4: Check subaccount approval status

Changelog