WASHINGTON - Nearly 160 million workers will benefit from the extension of the reduced payroll tax rate that has been in effect for 2011. The Temporary Payroll Tax Cut Continuation Act of 2011 temporarily extends the two percentage point payroll tax cut for employees, continuing the reduction of their Social Security tax withholding rate from 6.2 percent to 4.2 percent of wages paid through Feb. 29, 2012. This reduced Social Security withholding will have no effect on employees' future Social Security benefits.

Employers should implement the new payroll tax rate as soon as possible in 2012 but not later than Jan. 31, 2012. For any Social Security tax over-withheld during January, employers should make an offsetting adjustment in workers' pay as soon as possible but not later than March 31, 2012.

Employers and payroll companies will handle the withholding changes, so workers should not need to take any additional action.

Under the terms negotiated by Congress, the law also includes a new "recapture" provision, which applies only to those employees who receive more than $18,350 in wages during the two-month period (the Social Security wage base for 2012 is $110,100, and $18,350 represents two months of the full-year amount). This provision imposes an additional income tax on these higher-income employees in an amount equal to 2 percent of the amount of wages they receive during the two-month period in excess of $18,350 (and not greater than $110,100).