If my total taxable income for 2017 was $33,122, why am I being taxed at 22% instead of 12%?

[rosebud133]

I am an unmarried individual with no children. 

[SweetieJean]

Is any of it self-employment income from cash, a 1099-MISC or a K-1?

[rosebud133]

Yes, the majority is from a 1099-MISC. Does that change the tax bracket I am in?

[Zbucklyo]

No, but it means that in addition to regular income tax, you have to pay self-employment tax (Medicare and Social Security) on your net income from self-employment.  This is taxed at 14.1%.

[rosebud133]

Thank you! This is very helpful.

[Coleen3 · Accepted solution]

Any profit from your Schedule C Profit or Loss from Business is taxed at 15.3%. The Social Security would be  taxed at 6.2 and the Medicare at 1.45% were you an employee. These amounts would be withheld on your W-2 every pay period. Since you are, in a way, both employer and employee, these amounts are doubled on your Schedule SE.

[Coleen3]

My pleasure.