How much self-employment tax will I owe in Illinois?

15.3% federal SE tax applies to 92.35% of net income; federal and Illinois income taxes may also apply.

Do I have to pay quarterly estimated taxes?

Yes. If federal tax due is $1,000 or more, pay April 15, June 15, September 15, and January 15.

Yes. Half of SE tax is deductible from AGI; this calculator applies it automatically.

No. It is a planning estimate; credits, deductions, and multi-state work can change your filing result.

Illinois taxes personal and 1099 income at a flat 4.95%; there is no separate state SE tax.

No. Chicago has no personal income tax; residents generally owe the 4.95% Illinois rate.