Internal Revenue Service United States Department of the Treasury
Level Basic Advanced Military International

Self-Employment Tax Form 1040-SS

Self-Employment Tax

Methods for Computing Self-Employment Tax (continued)

Regular Method Step 3: Determine Self-Employment Tax

The third step is to determine the actual tax. Use these formulas to determine a taxpayer's self-employment tax:

  • Net earnings x .124 = Social Security tax
  • Net earnings x .029 = Medicare tax
  • Social Security tax + Medicare tax = Self-employment tax
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