Illinois Income Tax Calculator (2026)
Illinois taxes wage income at one flat rate of 4.95% after a standard deduction of $2,925 for single filers, on top of federal income tax and FICA.
Last updated
At a glance
Everything below is for tax year 2026 and a single filer unless stated otherwise. Rates, brackets and deductions come from the Tax Foundation tables in force on January 1, 2026; federal amounts come from IRS Revenue Procedure 2025-32.
| Rule | Illinois, 2026 |
|---|---|
| Structure | Flat rate |
| Top rate | 4.95% |
| Standard deduction, single | $2,925 |
| Standard deduction, married | $5,850 |
| Per dependent | $2,925 |
| Brackets (single) | 1 |
| Taxable income starts from | Illinois's own calculation |
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Paycheck examples
Four salaries, all computed by this site's own engine: single filer, paid every two weeks, no 401(k) deferral, no health premiums and no local tax. “Take-home” is what lands in the account each payday after every withholding below.
| Salary | Federal | State | FICA | Take-home / paycheck | Effective rate |
|---|---|---|---|---|---|
| $50,000 | $3,820 | $2,330 | $3,825 | $1,539.41 | 20.0% |
| $75,000 | $7,670 | $3,568 | $5,738 | $2,231.72 | 22.6% |
| $100,000 | $13,170 | $4,805 | $7,650 | $2,860.57 | 25.6% |
| $150,000 | $24,734 | $7,280 | $11,475 | $4,096.57 | 29.0% |
Brackets and deductions
A single rate applies to every dollar of state-taxable income: The Illinois standard deduction of $2,925 (single) or $5,850 (married) comes off first.
| Rate | From | To |
|---|---|---|
| 4.95% | $0 | and above |
What we do not model
The figures above exclude local and municipal income taxes, tax credits, itemized deductions, phase-outs, alternative minimum tax, state disability insurance, and the Form W-4 details that change real withholding. They are an estimate, not tax advice — see the full disclaimer for what the model does and does not cover.
Common questions
- How does Illinois income tax work?
- Illinois uses a single flat rate of 4.95% on its own taxable income, after a standard deduction of $2,925 for single filers or $5,850 for married couples filing jointly. There are no brackets to climb, so every additional dollar is taxed at the same rate.
- What is the top Illinois income tax rate?
- The top Illinois rate is 4.95%, and it only applies to income above the highest bracket threshold shown above — not to your whole salary. The rate on your first dollars is 4.95%.
- What is the Illinois standard deduction for 2026?
- $2,925 for single filers and $5,850 for married couples filing jointly, plus $2,925 for each dependent. Taxable income is what remains after that deduction, and it is what the brackets are applied to.
- What is the take-home pay on $100,000 in Illinois?
- For a single filer paid biweekly with no 401(k) deferral and no health premiums, a $100,000 salary in Illinois leaves $2,860.57 per paycheck — $74,374.79 a year, an effective rate of 25.6% after $13,170 of federal income tax, $4,805 of Illinois tax and $7,650 of FICA.
- Do remote workers pay Illinois income tax?
- A Illinois resident is generally taxed by Illinois on wages earned anywhere, including wages for a remote job whose employer sits in another state. Days worked physically outside Illinois can matter in some cases, and a non-resident working in Illinois is generally taxed on income earned here. Nothing here is tax advice — the details depend on your situation.
- Does Illinois have local income taxes?
- Illinois has no broad statewide local income tax layered on top of the state rate that this calculator models. School, county, city or occupational taxes can still apply in particular places, and the calculator does not model them.
Want to see Illinois next to somewhere else? Compare two states side by side, or go back to income tax in all 50 states.