The Social Security Administration has announced that the wage base for computing the Social Security tax (OASDI) in 2011 remains unchanged for the third year in a row at $106,800. Thus, on a salary of $106,800 (or more), an employee and his or her employer each will pay $6,621.60 in Social Security tax in 2011, the same as in 2010 and 2009.This means that monthly Social Security and Supplemental Security Income (SSI) benefits for more than 58 million Americans will not automatically increase in 2011.