The Streptococcus bovis/Streptococcus equinus complex includes four major species that all belong to group D streptococci (GDS); this taxonomy was established in 2003 and is summarized in the Table (table 1) [1].
For 2014, the self-employment tax rate is 15.3 percent. The rate is divided into two parts: 12.4 percent for social security and 2.9 percent for Medicare. But as a self-employed individual, you are considered both the employer and the employee, which makes the entire self-employment tax burden yours.
Self-employment Tax and Social Security Tax. Income from both self-employment and from employment (wages and tips) are included in income for the Social Security maximum. The total self-employment tax rate is 15.3% of the net profit of the company owned by the individual, with the Social Security portion at 12.4% of that total.