I understand that Long Term Capital Gains are included in AGI, which in turn determines the LTCG tax rate. I'm married filing jointly, so the 15% rate begins at $89,250 of taxable income. So, if my ordinary income is $75K, and I have $20K of LTCG, that pushes me over the $89,250 threshold. Is all of my LTCG then taxed at 15%, or just the amount that exceeds $89,250, i.e. $5,750?
