Illinois Income Tax Calculator
Illinois income tax is calculated on your taxable income after deductions and exemptions. This calculator estimates your Illinois state income tax liability for the current tax year. Enter your annual gross income, choose your filing status (single, married filing jointly, married filing separately, or head of household), and add any pre-tax deductions to see your estimated state tax, effective tax rate, and marginal bracket. Results update in real time as you adjust your inputs. The calculator covers Illinois state income tax only; federal income tax, FICA payroll taxes, and any local income taxes your city or county imposes are separate. All rates and brackets are sourced directly from Illinois Department of Revenue and are verified for the current tax year. Use this tool alongside the federal income tax calculator to see your combined total tax liability. Effective rate and marginal rate are both shown so you can evaluate the impact of additional income, filing status changes, or increased pre-tax contributions to a 401(k) or similar plan.
Illinois applies a flat income tax rate of 4.95% to all taxable income. On a $60,000 salary (single filer) the state income tax is $2,970.00, an effective rate of 4.95%.
How Illinois income tax works
Illinois applies a flat 4.95% income tax rate on all net income for individuals, regardless of income level or filing status. The rate has been 4.95% since July 1, 2017, when it was raised from 3.75% under the state budget agreement. A 2020 ballot measure to switch to a graduated rate structure was rejected by voters, preserving the flat rate. Illinois reduces taxable income via a personal exemption allowance rather than a standard deduction. Your result updates the page link, so you can copy a permalink to any calculation.
taxable income = gross income - standard deduction
state income tax = taxable income x flat rate / 100
effective rate = state income tax / gross income x 100
Illinois income tax: frequently asked questions
How much is the Illinois income tax on a $60,000 salary?
A single filer earning $60,000 a year in Illinois has a taxable income of $60,000.00 after the standard deduction. The computed state income tax is $2,970.00, an effective rate of 4.95%. Enter your own income above for an exact figure.
What is the Illinois state income tax rate?
Illinois applies a flat income tax rate of 4.95% to all taxable income, regardless of income level or filing status.
What filing statuses does Illinois income tax apply to?
Illinois income tax applies to single filers, married couples filing jointly, head of household filers and married couples filing separately. Bracket thresholds and standard deductions may differ by filing status.
What is Illinois's income tax rate for 2025?
Illinois taxes all net income at a flat 4.95% rate for individuals, regardless of income level or filing status. This rate has been in effect since July 1, 2017. Source: Illinois Department of Revenue.
Does Illinois have a standard deduction?
No. Illinois does not have a standard deduction. Instead, Illinois allows a personal exemption allowance of $2,850 per taxpayer for tax year 2025 (so $5,700 for a married couple filing jointly). An additional $2,850 allowance is available for each qualifying dependent claimed on Schedule IL-E/EIC. The allowance is eliminated entirely if your federal AGI exceeds $250,000 (single) or $500,000 (married filing jointly). Source: Illinois Department of Revenue, 2025 IL-1040 Instructions.
Does Illinois have a graduated income tax?
No. Illinois has a flat income tax rate set by the Illinois Constitution. A 2020 ballot measure to switch to a graduated rate structure was rejected by voters. The current flat rate is 4.95% for all taxpayers. Source: Illinois Department of Revenue.
What is the Illinois personal exemption allowance for 2025?
For tax year 2025, Illinois allows a personal exemption allowance of $2,850 per taxpayer. A married couple filing jointly claims $5,700 (two taxpayers at $2,850 each). Each qualifying dependent adds another $2,850 via Schedule IL-E/EIC. The allowance is fully phased out if federal AGI exceeds $250,000 for single filers or $500,000 for married filing jointly. Source: 2025 IL-1040 Instructions and Schedule IL-E/EIC, Illinois Department of Revenue.
Official sources
- Illinois income tax rates (tax year 2025): Illinois Department of Revenue, as at Jun 12, 2026.
Reviewed by the CalculatorHub team, edited by James Graham, 11 June 2026. See our methodology. General information, not financial or tax advice.