RSUs are still subject to FICA taxes, see e.g. [0] and [1]. Also, most tech workers are above the income limit for Social Security taxes, so their marginal payr

RSUs are still subject to FICA taxes, see e.g. [0] and [1]. Also, most tech workers are above the income limit for Social Security taxes, so their marginal payroll tax rate is only 2.9%. [0] https://www.foley.com/en/insights/publications/2020/08/restricted-stock-units-10-fast-facts https://www.foley.com/en/insights/publications/2020/08/restr... [1] https://www.mayerbrown.com/en/perspectives-events/blogs/2020/08/irs-updates-guidance-on-timing-of-wage-and-fica-withholding-for-stock-options-and-rsus https://www.mayerbrown.com/en/perspectives-events/blogs/2020...