Will residual balance be converted to base currency upon account closure request?

IBKR will automatically close individual accounts maintaining a zero balance in order to avoid continuing market data subscription fees.

If all positions have been closed and a close account request has been submitted through Client Portal, IBKR will automatically convert Settled Cash balances to base currency provided the balance held is less than USD 1,000 equivalent. Clients holding currency balances exceeding this threshold will be required to submit closing trades in order to close their currency position before the account closure request will be processed…

In the event you submit an account closure request, we normally transfer all the residual cash balance to you upon account closure.

For USD-based accounts, we will initiate an ACH transfer based on an ACH bank instruction you have on file. If you have more than one ACH bank instruction on file, you will have the opportunity to select one. If you do not have any ACH bank instructions, we will issue a check to your U.S. mailing address on file. For all non-USD based accounts, we will issue a wire based on the banking instruction on file…

IBKR will enter liquidation orders in your account to reduce margin requirements when an account is in a margin deficit. In addition, IBKR will convert residual currency balances less than USD 5 or the non-USD equivalent. …

In the event of account closure, IBKR will mail a physical check with the proceeds if the account is held with IB LLC, maintains an address in the U.S. and has elected a Base Currency of USD. Note that the account holder also has to submit their account closure request…