What is the standard personal exemption in Illinois for 2026?

The Illinois standard exemption allowance is $2,775 per person (taxpayer, spouse, and qualified dependents), phased out for individual taxpayers with AGI over $250,000 ($500,000 for joint filers).

Does Illinois allow a tax credit for property taxes paid on my home?

Yes. Illinois homeowners can claim a nonrefundable 5% tax credit on the property taxes paid during the tax year on their principal primary residence.

USAUpdated for 2026Taxes

Illinois State Income Tax Calculator (IL-1040) 2026

Calculate your statutory Illinois individual income tax liability using the state flat 4.95% tax rate, basic exemption allowances ($2,775 per person), and 5% residential property tax credit.

Taxes & Duties Income Tax & Brackets Salaries & Monthly Wages

Calculated Result

Net Illinois State Income Tax Due (4.95%)

$3,632.78

Calculator Inputs

Federal Adjusted Gross Income (AGI)

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Total State Exemptions (Self, Spouse, Dependents)

exemptions

Quick select:

Net Illinois State Income Tax Due (4.95%)

$3,632.78

Effective Illinois State Tax Rate

4.27 %

Estimated Monthly State Withholding

$302.73

Total Personal Exemption Deduction

$5,550

Illinois Net Taxable Income

$79,450

Base Illinois Tax (4.95%)

$3,932.78

Illinois Residential Property Tax Credit (5%)

$300

Illinois imposes a constitutionally mandated flat individual income tax rate of 4.95% on net taxable income after statutory exemptions.

This calculator is a mathematical model for general financial estimation, planning, and educational guidance. Results depend on your inputs and standard formulas, and do not constitute binding financial, tax, or investment advice. Always consult a qualified professional before making financial decisions.

Official Statute: Illinois Income Tax Act (35 ILCS 5/201 - Flat 4.95% Individual Income Tax & Standard Exemption Allowance)Last Verified: 2026-09-04

Calculation Methodology

Total IL Exemption = Number of Exemptions * $2,775. Illinois Base Taxable Income = max(0, Adjusted Gross Income - Total Exemption). Base Tax = Taxable Income * 4.95%. Property Tax Credit = Real Estate Taxes Paid * 5%. Net IL Tax Due = max(0, Base Tax - Property Tax Credit).

Frequently Asked Questions

Illinois has a constitutionally mandated flat tax rate of 4.95% for all individual taxpayers, regardless of marital filing status or income level.

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Illinois State Income Tax Calculator (IL-1040) 2026

Calculator Inputs

Calculation Methodology

Frequently Asked Questions

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