Illinois Income Tax Brackets 2026
What are the Illinois income tax brackets for 2026?
Illinois has no bracket ladder in 2026: one flat rate of 4.95% applies to state taxable income, after a standard deduction of $0 single ($0 married filing jointly) and any personal exemption. On a $75,000 salary, a single filer pays $3,568 of Illinois income tax.
Illinois keeps its 2026 income tax simple: a flat 4.95% rate on taxable income, with a standard deduction of $0 for single filers and $0 for married filing jointly.
Updated October 29, 2026
Illinois brackets for single filers, 2026
Rates apply to Illinois taxable income: gross pay minus the standard deduction and any personal exemption. In Illinois the schedule fills from the bottom up: the single rate of 4.95% applies across taxable income, with no higher bracket waiting at any salary.
| Taxable income (single) | Rate |
|---|---|
| $0 and up | 4.95% |
Illinois brackets for married filing jointly, 2026
| Taxable income (joint) | Rate |
|---|---|
| $0 and up | 4.95% |
Standard deduction and exemption in Illinois
The 2026 standard deduction is $0 for single filers and $0 for married filing jointly. Illinois also allows a personal exemption of $2,925 for single filers and $5,850 for joint filers, which comes off taxable income alongside the standard deduction. In Illinois, that means the first $2,925 of a single filer's pay is taxed at zero before the schedule even starts.
Worked example: the brackets on a $75,000 salary
A single filer earning $75,000 in Illinois first removes the standard deduction and personal exemption, leaving $72,075 of taxable income. Each bracket then takes its slice:
| Bracket range | Income in bracket | Rate | Tax |
|---|---|---|---|
| $0 and up | $72,075 | 4.95% | $3,568 |
Total Illinois income tax: $3,568, an effective rate of 4.76% of gross pay. The marginal rate, the rate on the next dollar Illinois taxes, is 4.95%; a raise that crosses into that bracket pays 4.95% only on the dollars above the line, never on the whole salary.
Illinois income tax on common salaries (single filer)
| Gross salary | Illinois income tax | Effective rate | Marginal rate |
|---|---|---|---|
| $40,000 | $1,835 | 4.59% | 4.95% |
| $50,000 | $2,330 | 4.66% | 4.95% |
| $75,000 | $3,568 | 4.76% | 4.95% |
| $100,000 | $4,805 | 4.81% | 4.95% |
| $150,000 | $7,280 | 4.85% | 4.95% |
How Illinois compares with other states
How Illinois compares: on a $75,000 salary, the $3,568 a single filer pays ranks 6th highest among the 42 states and districts that tax wages in 2026, just behind Minnesota at $3,577 and just ahead of Massachusetts at $3,530.
A flat rate makes the marginal math unusually clean: every extra $1,000 of taxable income in Illinois adds exactly $50 of tax, no matter which end of the pay scale it lands on. A single filer's Illinois tax bill passes $1,000 at a gross salary of about $23,127, once the standard deduction has done its work.
To turn these figures into an actual paycheck, use the Illinois income tax calculator for any salary, or the Illinois take-home pay calculator to see the same salary after federal tax and FICA as well. Per pay period, the paycheck calculator breaks the Illinois result down further, and the state tax brackets hub lines up all 50 states and DC side by side.
Frequently asked questions
What is the Illinois income tax rate in 2026?
Illinois charges a flat 4.95% on state taxable income in 2026. There are no graduated brackets: the same rate applies from the first taxable dollar to the last.
What is the standard deduction in Illinois for 2026?
The standard deduction is $0 for single filers and $0 for married filing jointly. A personal exemption of $2,925 single and $5,850 joint also applies.
How much Illinois income tax is owed on $75,000?
A single filer earning $75,000 pays $3,568 of Illinois income tax for 2026 in this model, an effective rate of 4.76% of gross pay.
Does Illinois have local income taxes on top of the state rate?
Some states and cities add local income taxes. This page models the state tax only; check whether your city or county in Illinois levies its own wage tax.