You don't get taxed when they are granted. That would be pretty rough, because a lot of people get several years of RSUs granted when they join a company. When

You don't get taxed when they are granted. That would be pretty rough, because a lot of people get several years of RSUs granted when they join a company. When the RSUs vest, they are taxed as income. If you hold on to the shares for a while before selling them, and they increase in value, you'll pay capital gains taxes when you sell them.