Use Link Existing Account to add a bank account you already own to an existing bank connection in Modern Treasury. Linking an account does not open a new account at your bank. To open a new account through Modern Treasury's payment service provider (PSP) offering, see Provisioning Accounts.

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Availability and permissions

Link Existing Account and Clone Account are available in live mode. Configure these permissions:

• Internal Accounts: View and Create to link or clone an account. Editing a linked account additionally requires Edit.
• Bank Connections: View.
• ACH Settings: View and Create when adding, changing, or removing ACH settings.

Your organization administrator can review your permissions.

Before you begin

Use an existing, configured bank connection. If you need a new bank connection, complete bank connection setup with Modern Treasury and your bank first. Adding an account to an existing connection does not require contacting your CSM or starting a new bank-integration process.

Have the account owner's details, account and routing numbers, payment capabilities, and any required ACH settings available. The fields and requirements depend on your connection and the payment types you plan to use.

Use Link Existing Account for all bring-your-own-account additions. To have Modern Treasury open a new account programmatically at a supported bank, use the Internal Accounts API instead. Dashboard account opening is available only through the PSP offering.

Link an account

1. Go to Accounts and select Actions → Link Existing Account.
2. Select the bank connection if prompted. This workflow lists non-PSP connections; use Open New Account for a PSP connection.
3. Enter the Party Name (the account owner's legal name) and Currency. You can optionally enter a Name to identify the account in Modern Treasury.
4. Add the account and routing details and any additional connection-specific fields needed for the account. Provide the account owner's address if required for the payment capabilities, such as checks.
5. Add the account's payment capabilities. Configure each payment type and direction separately, using the options available for the selected connection. Supply the details required for those capabilities.
6. If the form shows ACH Settings, enter the settings provided for your bank connection. Review the payment direction and other bank-specific values before saving.
7. Review the form's summary and select Link Account. On success, you are taken to the new Internal Account's details page.

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ACH settings

For connections that require ACH settings, complete those settings before originating ACH payments. The form can allow you to save an account without an ACH setting, but those payments will fail validation.

Before using the account, check its status and payment capabilities and complete any bank-side setup required for your connection. Once your bank connection is complete and live, follow the penny-testing guide to validate the account's payment setup.

Use an existing account as a template

If you are adding another account on the same bank connection, Clone Account can prefill the linking form with an existing account's configuration.

1. Open the source account from Accounts.
2. Select Actions → Clone Account.
3. Review the copied information, including routing details, payment capabilities, and ACH settings. The new account uses the same connection. The account name, account numbers, vendor identifier, check capability identifiers, and vendor-assigned account or wallet IDs are cleared. Enter the details for the different bank account you want to link.
4. Update any other copied values that differ for the new account, then select Link Account.

Cloning creates a separate Internal Account record when you submit the form. It does not open another account at the bank or copy the original account's account numbers.

Edit a linked account

1. Open the linked account from Accounts and select Actions → Edit Account.
2. Update its details, payment capabilities, or ACH settings as needed. The account's currency is read-only.
3. Select Save Changes.

This edit workflow is available for accounts on non-PSP connections that are not closed. It is not available for PSP accounts.