Illinois Paycheck Calculator
Use this calculator to estimate your take-home pay in Illinois after federal income tax, Social Security, Medicare, and state income tax, plus any 401(k) or HSA contributions. Enter your gross salary and filing status to see what actually lands in your bank account each pay period. Illinois applies a single flat income tax rate to your taxable income, on top of federal tax and FICA. For a single filer earning $75,000 a year, that works out to roughly $58,021 in take-home pay — about 77.4% of gross.
Take-home, every 2 weeks
$2,231.58
$58,021/yr · 22.6% effective tax rate
| Gross pay | $75,000 | $2,884.62 |
| Federal income tax | -$7,670 | $295.00 |
| Illinois state income tax | -$3,571 | $137.36 |
| Social Security | -$4,650 | $178.85 |
| Medicare | -$1,087 | $41.83 |
| Take-home pay | $58,021 | $2,231.58 |
Estimate for tax year 2026. Assumes standard deduction, no credits. Not tax advice.
How your Illinois paycheck is calculated
Your paycheck is your gross pay minus four things: federal income tax, FICA (Social Security and Medicare), state income tax, and any pre-tax deductions you choose. We compute each one the way payroll does, then subtract them to get your net pay.
Federal income tax is graduated: the calculator applies the 2026 IRS brackets to your income after the standard deduction, so only the portion of income inside each bracket is taxed at that bracket's rate.
FICA is a flat 7.65% for most workers — 6.2% for Social Security (up to an annual wage cap) plus 1.45% for Medicare, with an extra 0.9% Medicare surtax on high earners. A traditional 401(k) lowers your income tax but not FICA; an HSA lowers both.
Illinois's flat state income tax is applied after its own standard deduction, so your state and federal taxable income can differ. Everyone pays the same state rate regardless of income level.
Worked example: a single filer in Illinois earning $75,000 pays about $7,670 in federal income tax, $5,738 in FICA, and $3,571 in Illinois state income tax, leaving roughly $58,021 in take-home pay for the year.
Illinois tax figures used in this calculator
| State standard deduction (single) | $2,850 |
| Flat state income tax rate | 5.0% |
Source: Illinois Department of Revenue via PolicyEngine US parameters · as of 2017-07-01 · methodology
Frequently asked questions
- How much of my paycheck is taxed in Illinois?
- At $75,000 for a single filer, total taxes and withholdings come to about 22.6% of gross pay in Illinois. Your effective rate rises with income and varies by filing status and pre-tax contributions.
- Does Illinois have a state income tax?
- Yes. Illinois charges a single flat rate on state taxable income, in addition to federal income tax and FICA.
- Does contributing to a 401(k) increase my take-home pay?
- No — a traditional 401(k) contribution reduces your take-home pay now, but it lowers your taxable income so less is lost to income tax. It does not reduce Social Security or Medicare taxes. Try different 401(k) percentages above to see the effect on this Illinois paycheck.
- Is this calculator's estimate exact?
- It's a close estimate using the 2026 federal brackets, FICA rules, and Illinois's current state tax rules, assuming the standard deduction and no tax credits. Your real paycheck can differ based on credits, local taxes, benefits, and employer specifics.