Illinois Paycheck Calculator
Calculate your Illinois paycheck instantly using the latest 2026 federal and state tax rates.
Inputs
Pre-Tax Deductions
After-Tax (Post-Tax) Deductions
Bonuses & Overrides
Results Summary
Pay Period Equivalences
| Interval | Net Amount |
|---|---|
| Annual | $0.00 |
| Monthly | $0.00 |
| Semi-Monthly | $0.00 |
| Biweekly | $0.00 |
| Weekly | $0.00 |
| Daily | $0.00 |
| Hourly | $0.00 |
Federal Income Tax
Federal income tax is a progressive tax withheld from your earnings based on IRS tax brackets. Your tax rate increases as your taxable income exceeds predetermined thresholds.
State Income Tax
State income tax is levied by individual state governments. Depending on the state, it can be a flat rate, a progressive scale, or zero.
Social Security
Social Security tax is a federal payroll tax under FICA that funds the retirement and disability benefits program. It is withheld at a flat 6.20% rate up to the annual limit.
Medicare
Medicare tax is withheld at a base rate of 1.45% under FICA to fund hospital insurance benefits. High earners face an additional 0.9% surtax on wages over $200k.
Pre-Tax Deductions
Pre-tax deductions (e.g. standard 401k, HSA, FSA, health premium payments) are taken from gross wages before taxes are calculated, lowering your overall tax bill.
After-Tax Deductions
After-tax deductions (e.g. Roth 401k, life insurance, union dues, charity) occur after tax withholdings are processed and do not reduce taxable wages.
Overview
Illinois uses a flat state income tax system, meaning all taxpayers pay the same tax rate regardless of their income level. While this makes calculation simpler than progressive states, you must still account for federal progressive taxes, FICA, and payroll deductions. This calculator uses the 2026 tax brackets and the Illinois flat rate of 4.95% to estimate your take-home pay.
How Taxes Work in Illinois
Illinois levies a flat state income tax of 4.95% on taxable income. Unlike progressive states, there are no tax brackets to navigate. Illinois also provides a personal exemption (which is indexed for inflation, estimated at ,770 for 2026) that reduces your state taxable income.
Federal vs State Taxes
Federal taxes are progressive and apply to your federal taxable income after subtracting the 2026 standard deduction (,100 for Single). State taxes are calculated separately using the Illinois flat rate of 4.95% on your state taxable income (gross minus deductions and personal exemptions), resulting in different calculations for state vs federal taxes.
Social Security
Social Security is a federal payroll tax under FICA that funds the U.S. retirement and disability program. For 2026, both employers and employees contribute 6.20% of gross wages up to the maximum wage base limit of ,100. Any earnings above this limit are not subject to Social Security tax.
Medicare
Medicare tax is withheld at a base rate of 1.45% of all gross wages. High earners are subject to an Additional Medicare Tax of 0.90% on earnings exceeding ,000 (Single) or ,000 (Married Filing Jointly).
Example Paycheck Calculations
Here are typical annual salary examples for a Single filer in Illinois with zero deductions:
| Annual Gross Salary | Biweekly Gross | Estimated Net (Per Period) | Estimated Net (Annual) |
|---|---|---|---|
| $40,000 | $1,538.46 | $1,243.85 | $32,340.00 |
| $60,000 | $2,307.69 | $1,823.85 | $47,420.00 |
| $80,000 | $3,076.92 | $2,351.92 | $61,150.00 |
| $100,000 | $3,846.15 | $2,855.00 | $74,230.00 |
Below are hourly wage examples based on a standard 40-hour work week:
| Hourly Rate | Weekly Gross | Biweekly Net | Monthly Net |
|---|---|---|---|
| $20/hr | $800.00 | $1,290.23 | $2,795.50 |
| $30/hr | $1,200.00 | $1,893.46 | $4,102.50 |
| $40/hr | $1,600.00 | $2,432.42 | $5,270.25 |
Common Paycheck Deductions
Pre-tax deductions (like 401(k), HSA, FSA, and health premiums) are deducted from your gross pay before federal and state taxes are calculated, lowering your overall tax bill. Post-tax deductions (like Roth 401(k) or life insurance) are taken after tax calculations and do not reduce your taxable base.
Tips for Increasing Your Take-Home Pay
To increase your take-home pay in Illinois, maximize your contributions to pre-tax accounts like a traditional 401(k) or HSA, which lowers your taxable income. Additionally, ensure your W-4 forms are accurately adjusted so you do not over-withhold taxes.
Frequently Asked Questions
What is the Illinois state income tax rate?
Illinois has a flat state income tax rate of 4.95% of your taxable income.
Does Illinois tax overtime pay?
Yes, overtime pay is fully subject to federal, state, and payroll taxes, calculated at the standard flat rate of 4.95% for state tax.
Does Illinois have city or county income taxes?
No, Illinois cities and counties do not levy local income taxes.
Are traditional 401(k) contributions tax-exempt in Illinois?
Yes, traditional 401(k) contributions are exempt from Illinois state and federal income taxes at the time of contribution.
How does the Illinois personal exemption work?
Illinois allows a personal exemption (estimated at ,770 for 2026) for each taxpayer, spouse, and dependent, which reduces your state taxable income.