Illinois Paycheck Calculator 2025
Estimate your take-home pay after federal taxes, Illinois state taxes, FICA, 401(k), and deductions
Income
Tax Profile
Pre-Tax Deductions (Optional)
Estimated Take-Home
$2,209
per paycheck · bi-weekly
Illinois · Single
Monthly
$4,786
Annual
$57,436
Total Withholding & Deductions
23.0%
Includes estimated taxes and paycheck deductions
Estimated Take-Home Ratio
77.0%
Paycheck Breakdown
Taxes
How Illinois Taxes Affect Your Paycheck
Illinois has a flat state income tax rate of 4.95% on all taxable income. There are no tax brackets — every dollar above the state's filing threshold is taxed at the same rate.
How Illinois paycheck estimates work
This Illinois paycheck calculator combines federal income-tax withholding, Social Security, Medicare, and the state rules represented in the current 2025 tax tables. Illinois uses a flat state income-tax structure. The state estimate is based on annualized gross pay, filing status, pay frequency, and deductions entered in the calculator; it is not a quote from an employer payroll system.
What is included
The result separates gross pay, pre-tax deductions, federal withholding, FICA, state income tax, and estimated take-home pay. The state data summary below explains the main rate or bracket assumptions for Illinois. Local city or county taxes, paid family leave, state disability insurance, benefits chosen through an employer, and unusual W-4 instructions may change an actual paycheck.
Illinois has a flat state income tax rate of 4.95% on all taxable income. There are no tax brackets — every dollar above the state's filing threshold is taxed at the same rate.
How to use this page
Enter the same pay frequency and gross pay shown on your offer or pay stub, then select filing status and deductions that match your situation. Compare the result with a real pay statement and revisit the estimate when your salary, residence, benefits, or tax year changes. The calculations are planning estimates for Tax Year 2025 and should be checked against the IRS and Illinois tax authority before making a filing or payroll decision.
Illinois Paycheck FAQ
What is the Illinois state income tax rate for 2025?
Illinois has a flat income tax rate of 4.95% for 2025. All taxable income is subject to this single rate.
Does Illinois allow deductions for 401(k) contributions?
Illinois does not allow deductions for 401(k) contributions on state tax returns, meaning your pre-tax contributions are still taxed at the state level.
How does Illinois' flat tax compare to neighboring states?
Illinois' 4.95% flat rate is competitive with neighboring Wisconsin and Iowa, though some nearby states have lower rates.
How We Calculate Your Paycheck
Federal & FICA Taxes
2025 federal income tax brackets (IRS Rev. Proc. 2024-61), Social Security 6.2% up to the $176,100 wage base, and Medicare 1.45% (+ 0.9% Additional Medicare Tax above $200,000).
State Tax Estimates
2025 state income tax rates for all 50 states and DC. Covers no-income-tax states, flat-rate states, and progressive bracket states. Rates last reviewed May 2025.
Pre-Tax Deductions
2025 contribution limits applied: 401(k) up to $23,500, HSA up to $4,300 (self) or $8,550 (family), FSA up to $3,300. Deductions reduce federal taxable income.
This calculator provides estimates for planning purposes only. It is not tax advice and does not constitute a legal or financial opinion. Consult a qualified CPA or tax professional for advice specific to your situation. Not affiliated with the IRS, any state tax authority, or any government agency.