The government reduction in Social Security payroll taxes (“tax holiday”) ended Dec. 31, 2012. The employee tax rate for Social Security will return to 6.2% from 4.2%, resulting in 2 percent less in after-tax pay beginning in the first January 2013 paycheck. This tax break was not extended in the Act passed by Congress on Jan. 1, 2013.
Estimated 2 percent increase for Social Security Payroll Taxes:
| Yearly taxable wages | Additional taxes you will pay (by month) | Additional taxes you will pay (by year) |
| $25,000 | $42 | $500 |
| $50,000 | $83 | $1,000 |
| $75,000 | $125 | $1,500 |
| $100,000 | $167 | $2,000 |
Additional Medicare Tax On Wages Over $200,000
The current Medicare tax rate of 1.45% will continue continue for 2013, but an additional Medicare tax of .09% will be withheld on wages paid to an employee in excess of $200,000 during the calendar year.
Federal Withholding Tax Rates
The Act maintains the current income tax rates for individuals earning up to $400,000 and families earning less than $450,000. The maximum marginal rate for employees making more than these amounts will now be 39.6% up from 35%.

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