State Tax Guide · Illinois · 2026
Illinois Income Tax: Complete Employee Guide (2026)
Understand the modeled Illinois withholding method, source-backed rates, deductions, and take-home pay examples for employees.
Does Illinois have income tax?
Illinois levies a flat state income-tax withholding rate on modeled taxable wages.
Illinois tax rates
4.95% flat withholding rate for the modeled default path.
Official source: https://tax.illinois.gov/forms/withholding/currentyear/il-700-t-withholding-guide-tables.html
Take-home pay examples
These examples use the calculator engine for a single filer paid biweekly with a standard W-4 and no pre-tax deductions.
| Annual salary | Illinois withholding | Net annual | Net biweekly |
|---|---|---|---|
| $40,000 | $1,980 | $32,340 | $1,243.85 |
| $60,000 | $2,970 | $47,420 | $1,823.85 |
| $80,000 | $3,960 | $61,150 | $2,351.92 |
| $100,000 | $4,950 | $74,230 | $2,855.00 |
| $150,000 | $7,425 | $106,366 | $4,091.00 |
How to reduce Illinois tax withholding
Traditional 401(k) contributions and HSA contributions are available as modeled pre-tax inputs in the calculator. State-specific HSA conformity is not encoded as a dedicated data field, so check current Illinois guidance or consult a qualified tax professional before relying on HSA treatment.
The encoded default withholding method does not include a separate single-filer standard-deduction field.
Key differences from federal withholding
Federal income-tax withholding is calculated separately using IRS Publication 15-T. Illinois withholding follows the encoded state method described above, with its own rates, deductions, and documented limitations. Local wage taxes, where supported, are separate from the state amount.
Illinois salary after taxes
Browse state-specific salary pages for common annual salaries from $40,000 to $200,000.
City guides for Illinois
Explore engine-derived salary and hourly examples for cities in Illinois.
Calculate your personalized Illinois take-home pay.
Calculate your Illinois take-home →Frequently Asked Questions
Does Illinois have an income tax?
Illinois levies a flat state income-tax withholding rate on modeled taxable wages.
What is the Illinois income tax rate for 2026?
Illinois uses a sourced flat withholding rate of 4.95% for the modeled default path.
How much Illinois tax on $75,000?
For the modeled default single-filer path, estimated Illinois withholding on a $75,000 salary is $3,713 per year, or $142.79 per biweekly paycheck.
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