The ORF is an exchange fee which OCC collects from its clearing members, including IBKR. Its stated purpose is to assist in offsetting exchange costs relating to the supervision and regulation of the options market (e.g., routine surveillance, investigations, and policy, rule-making, interpretive and enforcement activities). The fee was initiated by the CBOE in mid-2009, by each of the BOX, ISE and PHLX in January 2010, by AMEX and ARCA in May 2011, by Nasdaq in January 2012, by C2 in August 2012, by Miami in January 2013, by ISE GEMINI in August 2013, by BATS in February 2015, by Nasdaq BX in February 2016, by BATS EDGX in February 2017, by PEARL in February 2017 and by MERCURY and EMERALD in February 2019. As of February 1, 2023, it is assessed to customer orders at a rate of $0.02905 per U.S. exchange listed option contract with the rate per exchange as follows: 

Note that the ORF is assessed on all trades, both buys and sells, in addition to the IBKR commission charge as well as any existing exchange fees (e.g., liquidity removal) and will be reflected on the Activity Statement as a Regulatory Fee.