Your Pay Details
IL Take-Home Pay Estimates
Single filer, after federal + IL state tax (4.95%) + FICA
$75,000/yr
$4,819/mo
$100,000/yr
$6,181/mo
$150,000/yr
$8,860/mo
Illinois vs Other States
$100,000 salary · single filer · same federal tax · no 401(k)
🏆 Texas / Florida$79,124
Colorado$74,724
Illinois$74,174
New York$68,224
⚠️ California$64,724
💡 On a $100K salary, Illinois workers take home $4,950 less per year than Texans — but $9,450 more than Californians.
Illinois Tax Facts
Illinois has a flat income tax rate of 4.95% — every taxpayer pays the same rate regardless of income. No brackets, no phase-outs, straightforward math.
Illinois does not tax Social Security, pension, or retirement income — making it more retiree-friendly than its flat wage tax rate might suggest.
Moving from Illinois to Texas on a $100K salary puts roughly $4,950 more in your pocket every year — just from eliminating state income tax.
A 401(k) contribution reduces both your federal and Illinois state taxable income — double the tax savings even at the flat 4.95% rate.
Illinois Flat Tax — 2026
4.95% on all income — no brackets
Illinois is one of a handful of states with a flat income tax. Every dollar of wage income is taxed at the same 4.95% rate — whether you earn $30,000 or $300,000. Simple, predictable, and lower than most neighboring states.
Your estimated IL take-home
$0.00
per paycheck
Federal tax
$0
0% effective rate
IL state tax
$0
0% effective rate
Social Security
$0
6.2% of gross
Medicare
$0
1.45% of gross
Deduction breakdown
Annual summary
| Item | Annual |
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How is an Illinois paycheck calculated?
Illinois uses a flat income tax system — every worker pays 4.95% of their wages in state income tax regardless of how much they earn. Combined with federal income tax and FICA, most Illinois workers earning $60,000–$150,000 see total taxes consume roughly 23–30% of gross pay, leaving 70–77% as take-home pay.
Illinois has a flat income tax rate of 4.95%. Unlike most states, Illinois does not use progressive brackets — every taxpayer pays the same 4.95% on all wage income regardless of how much they earn. This makes Illinois paycheck calculations simple and predictable.
Yes. Illinois is one of a small number of states that uses a flat tax system. Every Illinois taxpayer pays 4.95% on all taxable income — whether they earn $25,000 or $500,000. There are no brackets, no phase-outs, and no income thresholds. Illinois also does not tax Social Security, pension income, or retirement distributions from 401(k) and IRA accounts.
On a $75,000 salary in Illinois as a single filer, you can expect to pay approximately: ~$8,238 in federal income tax (effective ~11%), ~$3,713 in Illinois state income tax (4.95%), ~$4,650 in Social Security (6.2%), and ~$1,088 in Medicare (1.45%). Total estimated take-home: $57,824/year or $4,819/month. Use the calculator above for your specific situation.
No. Illinois does not tax Social Security benefits, pension income, or distributions from 401(k) and IRA retirement accounts. This is one of Illinois's most taxpayer-friendly features — retirees in Illinois often have a lower effective tax burden than workers, since their retirement income is fully exempt from state tax.
This calculator uses 2026 federal tax brackets (IRS Rev. Proc. 2025-32) and Illinois's flat 4.95% state income tax rate. Since Illinois uses a flat rate, the calculation is straightforward. Results are estimates for planning purposes. Actual withholding depends on your W-4 elections and IL-W-4 state form. Always verify with your HR department for precise amounts.