No, IBKR does not charge a fee for an incoming or outgoing ACATS transfer.
While IBKR does not charge for incoming or outgoing ACATS transfers, customers should consult with their sending or receiving firm to determine if there will be any applicable fees on their end. Clients whose account has been transferred to IBKR using an industry convention referred to as “Negative Consent” will be charged a $100 processing fee if they transfer their accounts out of IBKR.