2026 Illinois Tax Calculator: 4.95% Flat Rate & Paycheck Estimator
Calculate your exact take-home pay in the Prairie State. Modeled with Illinois's constitutional 4.95% flat income tax rate, personal exemptions ($2,775/allowance), and 2026 federal brackets.
Interactive Illinois Paycheck Calculator
2026 Illinois Take-Home Pay Estimate
Full Paycheck & Tax Withholding Schedule
Detailed breakdown comparing annual totals against monthly, bi-weekly, and weekly paychecks.
| Tax Category | Annual | Monthly (12x) | Bi-Weekly (26x) | Weekly (52x) | % of Gross |
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2026 Federal & State Calculation Details
How Illinois Taxes Your Paycheck in 2026
Illinois levies a flat state income tax of 4.95% on individual wage earnings. In 2020, Illinois voters rejected a proposed constitutional amendment that would have transitioned the state to graduated, tiered tax brackets. As a result, the Illinois Constitution mandates that all personal income continues to be taxed at a single flat rate.
Illinois Personal Exemptions ($2,775 for 2026)
Instead of a standard deduction that matches the federal code, Illinois grants a standard personal exemption of $2,775 for 2026 for each person claimed on your state tax return (Form IL-1040):
- Single Filer: $2,775 exemption
- Married Filing Jointly: $5,550 exemption ($2,775 × 2)
- Dependents: Additional $2,775 per eligible child or dependent
- Phaseout Threshold: For taxpayers with federal adjusted gross income (AGI) exceeding $250,000 ($500,000 for married joint filers), the personal exemption is phased out completely.
Illinois 2026 Paycheck Take-Home Pay Table
| Gross Salary | Federal Tax | FICA (7.65%) | Illinois Tax (4.95%) | Net Take-Home Pay | Effective Tax Rate |
|---|---|---|---|---|---|
| $50,000 | $3,865 | $3,825 | $2,338 | $39,972 | 20.1% |
| $75,000 | $7,842 | $5,738 | $3,575 | $57,845 | 22.9% |
| $100,000 | $13,019 | $7,650 | $4,813 | $74,518 | 25.5% |
| $150,000 | $24,019 | $11,475 | $7,287 | $107,219 | 28.5% |
| $200,000 | $36,019 | $13,818 | $9,763 | $140,400 | 29.8% |
Retirement Income Exemption in Illinois
A major benefit of living in Illinois is its full exemption for qualified retirement income:
- Social Security: Completely exempt from Illinois state income tax.
- Pensions & 401(k) Distributions: Traditional pensions, 401(k) plans, 403(b) annuities, and IRA withdrawals are exempt from Illinois state tax under 35 ILCS 5/203.
Are There City Income Taxes in Illinois?
Unlike neighboring states such as Ohio, Michigan, and Indiana, no city in Illinois imposes an earned income tax or municipal wage tax. Even in the City of Chicago, workers pay 0% city income tax. All income tax liability is captured strictly through the state's 4.95% rate.
Frequently Asked Questions About Illinois Taxes
Does Chicago have a city income tax?
No. Chicago does not levy an individual wage or income tax. Chicago residents and commuters pay only the Illinois 4.95% flat state tax and federal taxes.
What is Illinois Form IL-W-4?
Illinois Form IL-W-4 (Employee's Illinois Withholding Allowance Certificate) tells your employer how many personal allowances you claim to determine how much state tax to withhold from your paycheck each pay period.
Can Illinois change to graduated tax brackets in 2026?
No. Changing to graduated brackets requires an amendment to the Illinois Constitution approved by a 60% supermajority of voters. The last attempt (the "Fair Tax" amendment in 2020) failed, leaving the 4.95% flat rate firmly locked into place.