It depends on what form your equity is in. If you have options, you're responsible for taking care of your own taxes. (And the exercise+hold AMT mess is something to watch out for, though it's a little more difficult to fall into that trap now since the AMT exemption amount was raised.)
Even if you have RSUs (where taxes are customarily withheld), the company will withhold at the minimum statutory rates, which may not match up with your personal tax bracket.
Yes mentioned the company might underwithhold. I’m just suggesting it isn’t quite as complicated as it is being made out to be, from personal experience.
Even if you have RSUs (where taxes are customarily withheld), the company will withhold at the minimum statutory rates, which may not match up with your personal tax bracket.