Accounts which have been arranged as a Cash type do not have access to the proceeds from the sale of securities until such time the transaction has resolved at the clearinghouse and proceeds have been provided to IBKR. Securities settlement usually takes place on the second business day following the sale transaction. Furthermore, funds that have been recently deposited may be subject to a withdraw restriction or a credit hold. The amount you see under "Available For Withdrawal" in the Transfer Funds section of Client Portal/ Account Management will reflect the previously mentioned settlement time and any deposit holds or withdrawal restrictions. More information on credit hold and withdrawal limitations on our website. See also: How can I check my cash balances in the Activity Statement? and Why can I not withdraw funds?