Illinois Paycheck Calculator
Illinois takes a flat 4.95% after a $2,925 personal exemption ($5,850 joint). See what's left.
Illinois taxes income at a flat 4.95%. There's no standard deduction, but each filer gets a personal exemption: $2,925 for 2026, or $5,850 for a married couple filing jointly. Heads of household, widowed filers and married people filing separately take the single $2,925.
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Estimates only. Not tax or legal advice. Consult a tax professional for accuracy.
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Illinois Paycheck FAQ
Common questions about paychecks and taxes in Illinois
What is the Illinois state income tax rate for 2026?
A flat 4.95% of Illinois net income, the rate in state law for tax years starting on or after July 1, 2017. It's the same for every filing status and every income level.
What is the Illinois personal exemption?
$2,925 for 2026, up from $2,850 in 2025; Illinois adjusts it for inflation. Single filers, heads of household, widowed filers and married people filing separately claim one, and a married couple filing jointly claims two, $5,850. Illinois has no standard deduction. No exemption is allowed if your federal adjusted gross income is over $250,000 ($500,000 on a joint return), a cutoff the calculator doesn't apply.
How much Illinois tax is withheld from a bonus?
Illinois lets an employer withhold on a bonus at the tax rate in effect when it's paid, 4.95%. Otherwise the bonus is withheld using the same method the employer uses for federal withholding.
What does this calculator leave out for Illinois?
Illinois starts from federal adjusted gross income, so pre-tax deductions such as 401(k) and HSA contributions lower your Illinois tax; the calculator starts from gross wages. It applies the personal exemption at every income, so above $250,000 of federal AGI ($500,000 joint), where Illinois allows none, it shows $144.79 a year too little tax ($289.58 joint). It also leaves out dependent exemptions ($2,925 each for 2026), the extra $1,000 exemptions at 65 or older or blind, and credits such as the property tax, K-12 education expense and earned income credits. Illinois has no local income tax.