Earlier quoted context omitted.
Most restricted stock subject to vesting will require the recipient to file an 83(b) election. This takes the full current value of all shares at the current issue price as income up front. Since the shares are typically worthless at that point, the tax bill is zero. The alternative is disastrous for a fast growing company. Each month, each year, you are vesting new shares at an exponentially increasing valuation, an…
>completely illiquid gain Which is why "liquidity event" is one of the conditions for vesting.
So you work for a startup for 10 years since inception, it's private all the time, you get annual grants for more and more options, building up options for 5% of the fully diluted shares, but then get disabled and have to stop working. Now you lose all your options because none of them have vested because the company didn't sell yet?