> If the value of the shares is worth more then you pay, the difference is income. This turns out to be true, but I think it overlooks hidden complexity. 1) Y

> If the value of the shares is worth more then you pay, the difference is income. This turns out to be true, but I think it overlooks hidden complexity. 1) You'll find a bunch of stuff online that says you don't have to pay tax on that difference if you're getting ISOs. Options newbies who believe that ISOs have no tax burden, newbies who don't know that AMT is a thing, are going to have a bad time. 2) Since AMT is a thing, it's difficult ("complex") to use options safely, if only in the sense that it requires making a prediction about the future. Exercise early and you could lose your investment if the company fails. Exercise late but pre-IPO and you can find yourself in huge trouble, on the hook for hundreds of thousands in taxes with no way to sell your stock to pay your taxes. If you exercise post-IPO and sell on day one and you'll more tax than you would if you hold for a year. Making the right choice here can be difficult.