What is the Illinois state income tax rate?

Illinois has a flat income tax rate of 4.95% on all taxable income, regardless of how much you earn.

Does Illinois have city or local income taxes?

No. Unlike some states, Illinois does not allow local municipalities to levy income taxes. Only the state and federal government tax your income.

Is Illinois a high-tax state?

Moderately. While the 4.95% flat rate is lower than top rates in California or New York, Illinois has high property taxes and sales taxes.

CalcTrust

Updated for 2025 Tax Rules

Illinois Paycheck Calculator

Illinois uses a flat income tax rate of 4.95% on all taxable income. Our Illinois paycheck calculator shows your take-home pay after federal taxes, state taxes, and FICA deductions.

Last updated: Dec 2025

View Methodology

You can also use our take home pay calculator for more details.

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Per paycheck pre-tax contribution

Overview

How It Works

The calculator applies the Illinois flat tax rate of 4.95%, 2025 federal tax brackets, and FICA taxes (Social Security 6.2%, Medicare 1.45%) to estimate your net pay.