There is a downside to RSUs. Say you work for a private company with a high valuation, e.g. AirBnB at $25B, and you are granted 0.01% equity over 4 years. That means you are vesting $2.5m of RSUs over 4 years, and these RSUs are taxable at that amount. Typically for folks earning over $150k/year in base salary, particularly if married, even half as much will put you into AMT territory, and you will end up paying a si…
I'm up in Canada, and the RSU structure for my employer is an initial grant of $3x, with $x vesting every year for three years. Only when I exercise the vested RSUs (flat exchange at fair market value - typically the average stock price over the past week) do I declare them as income, at which point it's taxed as per usual for employment income.