2013 Social Sec/Medicare Rates & Wage Bases
Social Security:
EmployEE: 6.2% on earnings up to $113,700
EmployER: 6.2% on earnings up to $113,700
Medicare:
Employee/employer (each) 1.45% on all earnings*
* Certain high-income taxpayers will be required to pay an additional Medicare tax beginning in 2013. For details, see the IRS information on this topic.
Basics: Employer must withhold additional Medicare tax at 0.9% on wages in excess of $200,000 in a calendar year, beginning at the time the excess is incurred. There is no employer match.
Source: http://www.ssa.gov/pressoffice/factsheets/colafacts2013.htm