While technically accurate, most of these replies gloss over the obvious effect for most middle class taxpayers. It's one thing to say that you must itemize deductions on Schedule A, but given the substantial increase of the Standard Deduction under the 2018 tax cuts an investor's margin interest plus all other Schedule A deductions-- e.g., medical bills over a certain amount, home mortgage interest, etc.-- will have to exceed $25,100 for married filing jointly (under 65), and $26,450 (over 65). That's a lot of margin interest! 🙂
