Illinois Flat Income Tax Comparison Calculator

Compare Illinois's constitutionally mandated 4.95% flat income tax against graduated-rate neighboring states to calculate relative tax burden for incomes from $30,000 to $500,000.

Principal ($)
Annual Rate (%)
Years
Compounding / Year
$ Finance Disclaimer: These calculators are for educational and illustrative purposes only. Results do not constitute financial advice. Consult a licensed financial advisor before making investment or borrowing decisions.
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How It Works

Compare Illinois's constitutionally mandated 4.95% flat income tax against graduated-rate neighboring states to calculate relative tax burden for incomes from $30,000 to $500,000

Each component has a specific meaning:

  • $30 — The $30 recorded for the scenario being assessed.
  • 000 — The 000 recorded for the scenario being assessed.

Note: Interpret the il flat tax result against the thresholds and context described above.

How to Use

Enter the $30, 000 for the scenario you are assessing. Compare Illinois's constitutionally mandated 4.95% flat income tax against graduated-rate neighboring states to calculate relative tax burden for incomes from $30,000 to $500,000. Use the il flat tax result to inform your calculation.

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Frequently Asked Questions