It's really unfortunate that most startups appear to be set up with ISO shares. The company I am at now is an LLC and distributes RSUs, which meant when I joined I was able to file an 83/b form which minimizes my tax impact.
At my last company, I exercised options. I owe the IRS tens of thousands of dollars due to AMT this year (not that it was unexpected, as I did heavy research beforehand).
Can anyone shed light why companies aren't set up to distribute RSU's (and allow employees to fill out an 83/b form within 30 days of being granted?). Is it not preferrable to investors for some reason?
The worst part of the AMT and exercising ISO shares at a startup is that it is nearly impossible to make an informed decision on whether or not to exercise (and how many shares to exercise). You can't possibly know your tax liability until next tax season when all your tax forms come in.
Last year, I called maybe 5 different tax accountants for advice on how to estimate what my tax impact would be for exercising shares and got 5 different answers. This stuff is COMPLICATED.
Finally just got TurboTax and plugged in some guesses of my deductions, etc and got some type of estimate. Filed some 1040ES's last year to minimize the penalty and hopefully will get close.
Another sad fact is how few people at startups are even educated on the subject. While one can argue it is up to each employee to do their own research, I think it is in startups ethical interest to have their CFO team give an overview of the stock plan and what kinds of things employees may want to ask their accountants about.