Why is my order rejected with a notification stating that funds are not fully available for withdrawal, despite having funds in my account and activated trading permissions?

A Cash account must have enough cash to cover the cost of a position plus commissions and can never hold a negative cash balance. When placing a Market order (or Stop order), the order value cannot be known with certainty prior to execution as the market can move in any direction at any moment. Because of this, an extra 5% is added to the order amount at the credit check step for Market type orders to account for market movements. If you receive an order rejection for not enough Settled Cash when you do in fact have the Settled Cash to execute your order at your desired price and quantity, try using a Limit order (or Stop Limit order for a Stop) or reduce the MKT order size…

If you do not see a linked account available in the drop down account selector, it is likely due to the fact that the account in question does not have approved trading permissions for the product. For instance, if you have 2 linked accounts and only 1 has approved US stock trading permissions, only that account with approved permissions will be reflected on the trading platform. …

Your available settled cash balance in the currency of denomination of the product will be used before opening a margin loan.

Margin is configured on an aggregate basis, so although you can fully pay for stocks in a margin account, once you run out of cash to pay for the securities IBKR will extend a loan…

To check your available funds for trading at Interactive Brokers (IBKR), follow these steps:

1. Log into your IBKR account…