10$ per month for the mandatory data subscription. And this is waivered when you do more than 10$ comish per month (or proportionally). As long as I remember.
IB does not require you to subscribe to any data feeds.
" There is no requirement to subscribe to market data in order to trade, and customers are free to receive market data from another IB account or data vendor, or to use only delayed market data."
With no data feed, If you don't pay at least $10 a month in commissions, IB charges you $10 a month.
