Flat Rate: USD 0.85 per contract plus exchange and regulatory fees. IB Flat Rate includes IB Execution, Clearing, and Carrying Fees. Volume Tiered: USD 0.25 - 0.85 per contract based on monthly trading volume, plus exchange, regulatory and carrying fees. So using ES as an example and flat rate structure: .85 + 1.14 exch + .01 Reg = $2RT Even lower using the volume tiered structure unless you hold a position for 10+ days as the carrying charge is .10/day/contract. Wonder what the other futures houses (Like Global, Mirus, Advantage, Velocity, amp, etc) will do in response to IB. Might have to open an IB account again.