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Incentive Stock Option (ISO) tax question - more specific this time
I've bought ISO stock over they years -- in NYSE traded companies.  Every time I've done so, they've done what's called "sell-to-cover".  And the gubmint treats the difference between FMV and purchase price as if it's part of your salary.  And for me, they've sold some stock extra to pay estimated taxes. So, if I got this right...  20,000 shares at $3 costs you 60,000 to buy them.  In my sell-to-cover at 5 scenario: did I get that right?  Keeping only 4,000 shares out of 20,000 doesn't feel right.  Maybe because I've always sold at a much ratio between strike price and FMV. Note I made some assumptions:  first is that the company will sell some of the stock to pay the taxes for you.  Second is your marginal tax rate.  Before you do anything check these. Is there some reason to exercise immediately?  I'd wait, personally.