Illinois Income Tax Calculator
Illinois applies a flat 4.95% state income tax rate.
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1/5 addedIllinois state tax brackets
| Taxable income | Rate |
|---|---|
| $0 – ∞ | 4.95% |
Take-home pay in Illinois at different incomes
2026 estimates for a single filer with wage income: federal income tax, Illinois income tax, and Social Security and Medicare (FICA). Self-employment tax, local taxes and state payroll taxes are not included.
| Gross salary | Federal tax | Illinois tax | FICA | Total rate | Take-home / year | Take-home / month |
|---|---|---|---|---|---|---|
| $25,000 | $890 | $1,093 | $1,913 | 15.6% | $21,105 | $1,759 |
| $50,000 | $3,820 | $2,330 | $3,825 | 20.0% | $40,025 | $3,335 |
| $100,000 | $13,170 | $4,805 | $7,650 | 25.6% | $74,375 | $6,198 |
| $200,000 | $36,734 | $9,755 | $14,339 | 30.4% | $139,172 | $11,598 |
How Illinois taxes your income
Illinois taxes income at a single rate of 4.95%. Because there is one rate, your state effective rate stays close to 4.95% as income rises once deductions are used up.
We subtract an estimated $2,925 (the state standard deduction plus any dollar-amount personal exemption) from your income before applying the Illinois brackets.
Not modelled: personal tax credits, most income-based phase-outs, deductibility of federal tax where a state allows it, local income taxes (for example city or county taxes), and state payroll taxes such as disability or family-leave contributions.
Compare every state in state income tax rates.
Illinois income tax FAQ
What is the Illinois state income tax rate for 2026?+
Illinois has a flat state income tax rate of 4.95% for 2026.
How much tax would I pay on $50,000 in Illinois?+
For a single filer earning $50,000 in wages, our estimate is $3,820 federal income tax, $2,330 Illinois income tax and $3,825 Social Security and Medicare tax, a combined 20.0%, leaving about $40,025 a year ($3,335 a month).
Does Illinois have a state income tax?+
Yes. Illinois taxes wage income at a flat rate, in addition to federal income tax and Social Security and Medicare tax.
Does this calculator include Social Security and Medicare tax?+
The take-home table does: 6.2% Social Security on wages up to $184,500 plus 1.45% Medicare, and an extra 0.9% Medicare above $200,000. The interactive calculator above shows income tax only. Self-employment tax is not included.
Does Illinois have local income taxes?+
Our estimate covers state income tax only. Some places charge extra local income tax (city, county or school district). Check Illinois's revenue department for the local taxes that apply where you live or work.
How accurate is this Illinois estimate?+
It is a planning estimate for a single filer. State brackets come from the Tax Foundation's 2026 table (published February 2026), updated for later rate changes we could confirm, and we do not model credits or most phase-outs. Confirm with the Illinois revenue department before filing.