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Employers are required to withhold the additional Medicare Tax at a 0.9 percent rate on wages and other compensation it pays to an employee in excess of $200,000 in a calendar year. There is no employer match for the additional Medicare Tax.
Social Security tax is one of the payroll taxes paid by employees, employers, and self-employed individuals each year. The Social Security tax rate is 12.4 percent; 6.2 percent is withheld from each of the employer and employee. The full 12.4 percent is paid by self-employed individuals. The Social Security withholding rate is set using a formula based on inflation. The Social Security tax rate is 12.4 percent; 6.2 percent is withheld from each of the employer and employee. The full 12.4 percent is paid by self-employed individuals. The Medicare withholding and employer-paid amounts are added to the Social Security rate to get what's called FICA taxes.