Illinois Paycheck Calculator and Illinois Salary Calculator
United States Uses United States federal and state tax and payroll rules. Updated
Illinois salary calculator and IL paycheck calculator for 2026: federal withholding, FICA, deductions and the flat state income tax shown on its own line.
Educational estimate only. Not tax, legal, payroll, accounting, insurance, or financial advice. Consult a qualified authority before acting on a result.
Results
How to read this: the verdict describes how much room your numbers leave, not a decision or an offer. Change any input to see how much the result moves.
Paycheck guides
These guides explain the payroll concepts behind the calculator and link back to the specific paycheck tools for testing scenarios.
- How to calculate take-home pay
- Gross pay vs net pay
- How federal withholding works
- Salary vs hourly paycheck
- Bonus paycheck tax explained
For all guide topics, open Guides. For source and estimate boundaries, read Calculation Methodology and Sources and Assumptions.
When this calculator fits
Use this page as an Illinois salary calculator or for hourly pay when federal withholding, FICA, deductions and the Illinois flat-rate withholding need to appear separately. Because the state rate is flat, the Illinois income tax line scales directly with taxable wages, and the page shows that line on its own so the state share of the paycheck is never hidden inside a total.
How to use this Illinois paycheck calculator
Use this Illinois paycheck calculator for a U.S. paycheck estimate with federal withholding, FICA, deductions, and supported Illinois withholding assumption labeled in the result.
It also addresses related questions around Illinois paycheck calculator, paycheck calculator Illinois, paycheck calculator for Illinois, and Illinois take home pay calculator intent. The terms are grouped by the job a visitor is trying to complete, so the page stays readable instead of repeating the same phrase in different forms.
What matters for Illinois paychecks
Illinois wage withholding can depend on payroll setup and state form details. The result labels the supported assumption, and manual overrides are available when your employer applies different treatment.
The result should be read as a paycheck estimate for Illinois, not a payroll instruction. Confirm unusual cases, local tax rules, employer setup, and official withholding treatment with payroll or a qualified authority.
For hourly, salary, take-home, W-4, bonus and paystub questions, start from the U.S. paycheck calculator, which lists each page; all of them apply the same federal calculation this page does.
How other states are handled
| State handling | Paycheck page |
|---|---|
| No state wage income tax, so the estimate is federal withholding and FICA | Texas, Florida, Tennessee, Nevada, New Hampshire, South Dakota, Wyoming |
| No state income tax, but a state employee premium is still withheld | Alaska, Washington |
| State withholding modeled automatically from official guidance | California, North Carolina, Indiana, Georgia, Ohio, Pennsylvania, Massachusetts |
| Partial coverage, with manual state withholding kept visible | New Jersey |
How the paycheck estimate is worked out
How Illinois withholding is worked out
Illinois withholds at a single flat rate of 4.95%, and the engine applies it to gross pay for the period. There are no brackets to cross, no standard deduction taken off the top, and no separate employee payroll contribution the way Pennsylvania, New Jersey, or California carry one. A raise does not move any part of your Illinois wages into a higher band. The state line scales in a straight line with gross pay, which makes it the most predictable of the nine.
The one thing the automatic figure leaves out is IL-W-4 allowances. Illinois lets employees claim allowances that reduce the wages subject to withholding, and the form here does not collect them, so the estimate runs the zero-allowance case. That makes the Illinois figure withhold slightly high rather than slightly low for anyone claiming allowances. If your paystub comes in below this estimate, allowances are the first thing to check, not the rate.
Because the structure is that simple, the Illinois line is easy to verify by hand: multiply the period's gross pay by 0.0495 and the result should match to the cent. If your paystub differs and you claim no allowances, the gap is coming from something in your employer's payroll setup rather than from the rate, and it is worth asking payroll instead of adjusting inputs until the two numbers agree.
State-level paycheck lines in Illinois
| Line | How it is treated for 2026 |
|---|---|
| Illinois withholding | Flat 4.95% of gross pay for the period |
| Brackets | None; the same rate applies at every wage level |
| Standard deduction | None subtracted before the rate in this model |
| IL-W-4 allowances | Not collected, so the estimate uses zero allowances and withholds slightly high |
| Employee payroll contribution | No separate Illinois employee contribution is modeled or added |
A worked Illinois paycheck
Take a single filer in Illinois on $51,960 a year, paid every two weeks with no pre-tax deductions. $51,960 is the state's median annual wage across all occupations, so this sits near the middle of the Illinois labor market rather than being a round number chosen to look tidy. The figures below are produced by running this page's own calculator, so they are what you would get by entering the same details in the form above.
Illinois: $51,960 a year, paid biweekly
| Line | Amount per paycheck |
|---|---|
| Gross paycheck | $1,998.46 |
| Federal income tax | -$155.97 |
| Social Security | -$123.90 |
| Medicare | -$28.98 |
| State income tax | -$98.92 |
| Estimated take-home pay | $1,590.69 |
That is $1,590.69 every two weeks, about $3,446.50 a month and $41,357.94 over a year, an effective paycheck tax rate of 20.40%. Median wage figures come from the U.S. Bureau of Labor Statistics, Occupational Employment and Wage Statistics, May 2025 state estimates, for all occupations.
Where these figures come from
The 4.95% rate comes from the Illinois Department of Revenue's 2026 IL-700-T Illinois Withholding Tax Tables.
Why location coverage is labeled
No Illinois local wage tax is modeled. The only municipal wage tax this engine calculates automatically anywhere is Philadelphia's, so an Illinois local payroll item has to be entered through the local withholding override. When nothing is entered, the local line reports an inactive local engine rather than a confirmed zero, which is a deliberate distinction: the tool is saying it did not look, not that there was nothing to find.
Coverage stays labeled in the result either way. Where a rule is not verified it is named as unsupported rather than guessed, and a manual override field is available when you know the amount from payroll guidance or an official source.
What this page assumes
The calculator converts salary or hourly earnings into one gross paycheck, subtracts pre-tax deductions, annualizes federal taxable wages for a W-4-style withholding estimate, applies FICA, then subtracts any entered state/local withholding and post-tax deductions.
Federal and FICA calculations run locally from versioned 2026 rule data. State and local withholding are coverage-labeled: unsupported jurisdictions are not silently guessed, and you can enter known withholding amounts when you have them. This is not tax, legal, payroll, or financial advice.
Common paycheck calculator mistakes
- Assuming every Illinois payroll line is automatic. Read the result coverage notes and use manual override fields for items outside verified support.
- Assuming the automatic state line covers every local tax. Illinois withholding here is computed from official guidance, but city, county and school-district levies in some of these states are separate lines. Check the local note above and enter a known local amount rather than assuming the state figure absorbs it.
What this calculator leaves out: This calculator is an educational estimate. It does not provide tax, legal, payroll, accounting, insurance, or financial advice; it does not file forms; it does not know every employer-specific benefit rule, local tax, wage-base history, payroll correction, reimbursement, or year-to-date adjustment; and unsupported state or local rules are not silently guessed.
Frequently asked questions
How much Illinois tax comes out of my paycheck?
Illinois withholds at a flat 4.95%, so a $100,000 salary paid biweekly gives about $190.38 per paycheck. The estimate here assumes zero IL-W-4 allowances, since the form does not collect them, which means it withholds slightly high for anyone claiming allowances rather than slightly low. If your employer applies a different Illinois setup, use the override fields or confirm with payroll.
Does Illinois have income tax brackets?
Not in the withholding method used here. The engine applies a single 4.95% rate to gross pay for the period, so the state line is the same percentage on the first dollar as on the last. Doubling gross pay doubles the Illinois figure exactly, which is not true in Ohio, Massachusetts, Georgia, or North Carolina.
Why is my Illinois withholding lower than this calculator shows?
Most likely because you claim allowances on Form IL-W-4 and the calculator does not collect them. It runs the zero-allowance case, which is the higher of the two. Each allowance reduces the wages subject to Illinois withholding, so a real paystub tends to come in below this estimate rather than above it.
Is there a separate Illinois employee payroll deduction like SDI or paid leave?
None is modeled here. The Illinois result is the income tax line and nothing else, unlike Pennsylvania, New Jersey, California, and Washington, where the engine adds a separate employee contribution alongside or in place of income tax. Anything else your employer withholds in Illinois belongs in the deduction fields.
Sources
The rules this estimate applies, each linked to the official publication it was taken from. Federal withholding and FICA come first; the state lines follow.
- IRS Publication 15-T (2026), Worksheet 1A and 2026 Percentage Method Tables for Automated Payroll Systems — reviewed 13 August 2026, in force 1 January 2026 to 31 December 2026.
- IRS Publication 15 (2026), Social Security and Medicare tax rates — reviewed 13 August 2026, in force 1 January 2026 to 31 December 2026.
- Illinois Department of Revenue, 2026 IL-700-T Illinois Withholding Tax Tables — reviewed 13 August 2026, in force 1 January 2026 to 31 December 2026.
This page is an educational estimate, not personal financial or tax advice. Withholding on a real paycheck depends on the W-4 on file and on payroll items this calculator does not see.