How much are self-employment FICA tax rates?

I understand that commissions, if not included in W-2 income, will be taxed normal income tax plus FICA self-employment taxes. Let's say I make $45,000 in regular W-2 salary and an additional $30,000 in commissions (for which the employer doesn't pay any FICA) - how much would I owe in taxes??

How much are self-employment FICA tax rates?
FICA refers to w-2 employment payments made to the Treasury by an employer paying both the employer and employee withholding.


Self employment is reported on a 1099 misc. The amount of tax due is based on the schedule C self employment earnings report where the earnings are matched to business deductions such as mileage and other expenses providing the net earnings.





The net earnings are attached to a schedule SE for self employment tax. Net earnings multiplied by .09235 multiplied X 15.3% on net earnings up to and including $87,900. Medicare tax of 2.9 % of net SE income applies with no limit on which the medicare is applied.
Reply:The above answer is mostly correct with exceptions to the limits.





For 2005 the social security tax base was $90,000 (not $87.900)


For 2005 the base is $94,200





These amounts are indexed for inflation and change each year.