l believe IB charges $25 for non active accounts. and this amount is reduced by the commissions generated that month, but does it aggregate the commissions generated if have multiple accounts? eg if one of two accounts from same owner, is inactive will the inactive fee apply to that account?
If you have them linked under an advisor account they are combined for calculating the fees. Advisor accounts also only pay one set of data fees. http://individuals.interactivebrokers.com/en/p.php?f=minimumDeposits I save so much when I do trade that I just consider the monthly minimums to be an fixed fee for having the accounts @ IB.