Illinois Income Tax Calculator
Estimate your Illinois income tax burden
Updated for 2024 tax year on Jul 23, 2024
Calculate your income tax in these states
How to calculate your Illinois income taxes
Table of Contents
Understanding your Illinois income taxes
Illinois uses a flat tax system for income, meaning all taxpayers are taxed at the same 4.95% rate, regardless of income level.
There’s no specific payroll tax in Illinois, but employers are obligated to contribute to the state’s unemployment insurance fund.
Illinois does not provide a standard deduction or personal exemption. However, it does offer several tax credits and exemptions based on specific circumstances, such as the Earned Income Credit and property tax credits.
Calculate your income tax in Illinois
- Work out your total federal income tax
- Gross income adjusted
Gross income − Pre-tax deductions = Gross income adjusted - Federal taxable income
Gross income adjusted − Federal standard/itemized deductions = Federal taxable income - Federal income tax liability
Federal taxable income × Federal income tax rate = Federal income tax liability - Federal payroll tax liability
Gross income × Federal payroll tax rate = Federal payroll tax liability
- Gross income adjusted
- Calculate your total Illinois state income tax
- Illinois state taxable income
Gross income adjusted − (Illinois state itemized deductions + Illinois state exemptions) = Illinois state taxable income - Illinois state income tax liability
Illinois state taxable income × Illinois state income tax rate = Illinois state income tax liability
- Illinois state taxable income
- Add up all the taxes
Federal income tax liability + Federal payroll tax liability + Illinois state income tax liability = Your total income tax liability
State income tax brackets
| Tax year | Filing status | Taxable income | Rate |
|---|---|---|---|
| 2024 2023 2022 2021 2020 |
Single Married, Filing Jointly or Widow(er) Married, Filing Separately Head of Household |
Any | 4.95% |
State exemptions
There are state-level exemptions for all type of filers and dependents. Refer to Tax Foundation for more details.
| Tax year | Filing status | Personal exemption amount |
|---|---|---|
| 2024 | Single Married, Filing Separately Head of Household |
$2,775 |
| Married, Filing Jointly or Widow(er) | $5,550 | |
| Dependent(s) | $2,775 | |
| 2023 | Single Married, Filing Separately Head of Household |
$2,425 |
| Married, Filing Jointly or Widow(er) | $4,850 | |
| Dependent(s) | $2,425 | |
| 2022 | Single Married, Filing Separately Head of Household |
$2,375 |
| Married, Filing Jointly or Widow(er) | $4,750 | |
| Dependent(s) | $2,375 | |
| 2021 | Single Married, Filing Separately Head of Household |
$2,325 |
| Married, Filing Jointly or Widow(er) | $4,650 | |
| Dependent(s) | $2,325 | |
| 2020 | Single Married, Filing Separately Head of Household |
$2,275 |
| Married, Filing Jointly or Widow(er) | $4,550 | |
| Dependent(s) | $2,275 |
FAQs
How to calculate income tax in Illinois?
Follow the steps below to calculate your total income tax in Illinois:
- Work out your total federal income tax
- Calculate your total Illinois state income tax
- Sum up all the taxes
How much income tax do I pay in Illinois?
In 2024, Illinois imposes a flat state income tax rate of 4.95% for all taxpayers regardless of income level.