There is no installation fee, flat fee, or term commitment to IBKR Order Management System (IBKR OMS) users. Only a monthly commission minimum of $2,500 is required. Trades originating from the IBKR OMS are charged a commission. This charge is then applied against the required monthly minimum amount.
Accounts are provided with access to 25 IBKR OMS terminals. Additional terminals and executing broker connections are available. Each additional connection will result in an increase of $100 to the monthly minimum.