Well... your best course of action would be to consult with a tax accountant.I think that you only have to pay taxes on the capital gains part of your distribution -- since you already paid tax on the principal part.So you put $100 in - then earned $200 in cap gains on top (which you haven't paid taxes on inside the IRA) - then when you take $300 out - you pay tax on $200 of it, but not the first $100You should definitely double check that.