🌽 Illinois Income Tax Calculator
Illinois charges a 4.95% state income tax on wages. Enter your salary below to see your exact take-home pay in Illinois for 2026.
Take-home pay in Illinois — quick reference
| Salary | Federal Tax | State Tax | Take-Home | Monthly |
|---|---|---|---|---|
| $40,000 | $2,620 | $1,980 | $32,340 | $2,695 |
| $60,000 | $5,020 | $2,970 | $47,420 | $3,952 |
| $80,000 | $8,770 | $3,960 | $61,150 | $5,096 |
| $100,000 | $13,170 | $4,950 | $74,230 | $6,186 |
| $150,000 | $24,734 | $7,425 | $106,366 | $8,864 |
| $200,000 | $36,734 | $9,900 | $139,027 | $11,586 |
About Illinois income tax
On top of federal income tax and payroll withholding, Illinois adds a state income tax around 4.95% on wages earned in the state.
The 4.95% figure overstates what typical earners actually pay — for $50,000–$200,000 in Illinois income, deductions and credits usually pull the effective rate a few points lower. Use the calculator above for your exact number.
Frequently asked questions
Compare other states
Related Calculators
What This Illinois Income Tax Calculator Does
Enter an income and filing status and the tool works through every layer that gets subtracted before a Illinois paycheck actually lands: state tax, federal tax, and payroll taxes.
This calculator is built for three kinds of people: salaried Illinois employees sanity-checking their withholding, freelancers and contractors penciling out quarterly payments, and anyone comparing a Illinois offer against a job somewhere else.
A flat 4.95% rate in Illinois keeps the arithmetic simple, but simple doesn't mean automatic — withholding still needs a manual check after any real change in pay.
Understanding Your Results
Illinois Tax Owed
The dollar amount you'd owe Illinois for the year after the standard deduction — stack this against what's already been withheld to see whether a refund or a balance due is coming.
Effective State Tax Rate
State tax as a percentage of full income rather than just the top bracket figure — two states with similar headline rates can have very different effective burdens.
After-Tax Income (State)
Gross income minus Illinois tax alone. Federal tax, Social Security, and Medicare still come out separately, so this isn't the final number — just one layer of it.
Illinois Income Tax Overview
There's no bracket math in Illinois: taxable income is taxed at one flat 4.95% rate from the first dollar to the last.
Current Tax Rate: 4.95%
Local Taxes
Some municipalities inside Illinois charge additional local income tax on top of the state rate, which this calculator doesn't account for — check local rules if you live or work in one.
Factors That Affect Your Illinois Tax Bill
A few things move the Illinois number beyond the headline rate:
| Factor | Effect |
|---|---|
| Filing status (single vs. married) | Affects deduction amount and bracket thresholds |
| Dependents | May reduce taxable income through exemptions or credits |
| Self-employment income | Fully taxable; must make estimated quarterly payments |
| Investment income | Generally taxable as ordinary income at state level |
| Retirement distributions | Treatment varies — check current Illinois guidance |
| Residency period | Part-year residents file on pro-rated income only |
Planning Tip
Re-run the numbers after a real change in pay. Illinois withholding tables don't self-correct for raises or bonuses, and catching the gap mid-year beats discovering it the following April.
Real-World Examples
Example 1: Single Filer, $55,000 Salary
For a $55,000 single-filer salary in Illinois, the standard deduction applies before any tax is calculated, which is why the effective rate ends up noticeably lower than the top-line number.
Example 2: Married Couple, $130,000 Combined Income
For a married couple filing jointly in Illinois with $130,000 combined income, the joint standard deduction usually pulls the effective rate slightly lower than the equivalent for two single filers.
Example 3: Self-Employed Individual, $80,000 Net Profit
There's no employer withholding Illinois tax automatically for the self-employed, so a freelancer clearing $80,000 in net business income needs to set aside money and send in quarterly estimated payments to dodge an underpayment penalty.
Example 4: Relocating To or From Illinois
At $250,000 in income, Illinois (4.95%) and Indiana — both flat-tax states — still produce a meaningfully different bill, since the flat rates themselves aren't identical.
Common Illinois Tax Mistakes
Confusing marginal rate with effective rate
Because Illinois taxes every dollar at the same 4.95%, the widely-quoted headline rate and the actual effective rate are one and the same — no bracket math needed.
Ignoring withholding adjustments after a major income change
Illinois withholding doesn't self-adjust when pay changes mid-year — catching a raise or bonus early beats finding out about the gap at tax time.
Not accounting for Illinois-specific deductions or credits
Estimates here use the standard deduction only; actual Illinois liability could be lower once state-specific credits are factored in. Worth a check against current Illinois Department of Revenue guidance before treating any number as final.
Part-year residents filing as full-year residents
A mid-year move in or out of Illinois calls for part-year resident filing status — only income earned during actual residency gets taxed by the state, not income earned before or after the move.
Tips for Illinois Taxpayers
- Check Illinois withholding once a year, and again after any raise, job change, or major life event.
- If self-employed, set aside Illinois estimated tax quarterly — due dates generally track the federal schedule (April, June, September, January).
- Run the numbers in October or November so there's still time to adjust withholding or make a final estimated payment before year-end.
- Weigh Illinois's full tax picture, not income tax alone — property tax and sales tax vary by state too and affect the real comparison.
Related Calculators You May Need
- Federal Income Tax Calculator — to see your combined federal and state tax burden together.
- Paycheck Calculator — shows both federal and Illinois state withholding from each paycheck.
- Salary Calculator — converts gross salary to take-home after all taxes including Illinois state tax.
- Self-Employment Tax Calculator — for Illinois freelancers and contractors who also owe self-employment tax on top of income tax.
- Property Tax Calculator — for homeowners in Illinois estimating their full state tax burden including property taxes.