your income is ABOVE the threshold - why do you think it is below?
the threshold is $200,000 of TOTAL income (single) or $250,000 (joint).,,, the threshold is NOT investment income alone
You pay 3.8% of all investment income (so the $100,000). look at form 8960 and I suspect you will about $3800 on line 17 for the tax; the threshold is calculated on lines 13-15.
does that help?
