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Illinois income tax and brackets 2026

Illinois taxes income at one flat rate of 4.95% in 2026. A single filer earning $75,000 in Illinois owes about $11,238 in federal and state income tax, an effective rate of 15.0%.

Updated ·By the BooksGPT team·2026 rates
Your year
$a year
$a year
Deduction
$16,100 for single filers
Runs in your browser·2026 rates·What it leaves out
Income tax · 2026
See the brackets
$11,238for the year
Effective rate 15.0% of income
Federal income tax$7,67068.3%
Illinois income tax$3,56831.7%
Taxable income
$58,900
Top federal rate
22%
Top Illinois rate
4.95%

Illinois tax brackets 2026

Illinois brackets · 2026
4.95%flat rate
One flat rate
Rate
4.95%
Taxable income
$72,075
Tax
$3,568
Illinois brackets, single
Illinois income tax brackets for 2026, single
RateTaxable incomeTax owed
4.95%YouAll taxable income4.95% of taxable income

Illinois at a glance

Income tax
4.95% flat
Personal exemption
$2,925
State payroll taxes
None
Local income tax
None
Sales tax
6.25%
2026 return due
Apr 15, 2027

How we work it out

  1. 1
    Income
    Your income for the year, less pre-tax retirement savings.
  2. 2
    Deduction
    The larger of the standard deduction and your itemized total.
  3. 3
    Federal brackets
    Each rate from 10% to 37% taxes only the income inside it.
  4. 4
    Illinois
    Illinois's own deduction and rates on the same income.
  5. 5
    Effective rate
    Your total tax divided by your income.

Illinois income tax questions

What are the Illinois tax brackets for 2026?
Illinois has one flat rate of 4.95% on taxable income, so every taxable dollar pays the same rate.
How much income tax do I pay on $75,000 in Illinois?
A single filer earning $75,000 owes about $7,670 in federal income tax and $3,568 in Illinois income tax for 2026, $11,238 in all. That is 15.0% of income.
Why is my average rate lower than my tax bracket?
Each rate taxes only the income inside its bracket. A single filer with $58,900 of federal taxable income is in the 22% bracket, but only the $8,500 above $50,400 pays 22%. The lower rates tax the rest, so the brackets come to $7,670, 13.0% on average.
What are the 2026 federal tax brackets?
Seven rates: 10%, 12%, 22%, 24%, 32%, 35% and 37%. The 37% rate starts above $640,600 for single filers and above $768,700 for married couples filing jointly.
Will Illinois's brackets change?
Flat 4.95% set in law; the personal exemption is indexed to inflation each year ($2,850 in 2025, $2,925 in 2026).
What is the 2026 standard deduction?
$16,100 for single filers, $32,200 for married couples filing jointly and $24,150 for heads of household. Illinois gives a $2,925 personal exemption instead.
Sources
Checked Oct 29, 2026. Estimates for planning, not tax advice.

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