Illinois income tax rate 2026
OfficialIllinois rates, brackets and the tax on common salaries.
- Rate
- 4.95%
- Tax on $75,000
- $3,568
- 4.8% effective
- Tax on $100,000
- $4,805
- 4.8% effective
- Rank among taxing states
- #5 of 42
- by tax taken on $75,000, 1 takes the most
What is the Illinois income tax rate in 2026?
Illinois taxes wages at a flat 4.95% in 2026. On a $75,000 salary, Illinois income tax is $3,568, an effective rate of 4.76%.
How this is calculated
- The effective rate is the yearly state income tax divided by gross pay, after the state's deductions and exemptions.
- The reference worker is a single filer with one job, paid every two weeks, with a standard Form W-4 and no pre-tax deductions, under 65.
Illinois income tax brackets for 2026
Illinois has one flat rate of 4.95% for every filer, so there are no brackets: the same rate applies to every dollar of taxable income. Illinois tax is owed on top of federal income tax, which follows the federal tax brackets for 2026.
Single
| Taxable income over | Rate |
|---|---|
| $0 | 4.95% |
Married filing jointly
| Taxable income over | Rate |
|---|---|
| $0 | 4.95% |
Head of household
| Taxable income over | Rate |
|---|---|
| $0 | 4.95% |
How much Illinois income tax do you pay on $100,000?
On $100,000 of wages, Illinois income tax is $4,805 in 2026, an effective rate of 4.81%. The table runs from $30,000 to $300,000. Enter your own pay in the Illinois tax calculator to see every paycheck. At the low end, see what a full-time job keeps at the minimum wage in Illinois.
How this is calculated
- Each salary is single filer wages with no pre-tax deductions, through the state's rules for the year.
- The reference worker is a single filer with one job, paid every two weeks, with a standard Form W-4 and no pre-tax deductions, under 65.
What is the Illinois standard deduction in 2026?
Illinois has no standard deduction of its own. Instead, each filer gets a personal exemption of $2,925 in 2026.
- Standard deduction, single
- None
- Married filing jointly
- None
- Personal exemption
- $2,925
How did Illinois income tax change in 2026, and what changes in 2027?
Illinois kept its rate at 4.95% in 2026. No 2027 schedule has been published yet.
| Tax year | Kind | Lowest rate | Top rate | Standard deduction, single | Status |
|---|---|---|---|---|---|
| 2025 | flat | 4.95% | 4.95% | none | official |
| 2026 | flat | 4.95% | 4.95% | none | official |
How does Illinois income tax compare with other states?
On $75,000, Illinois income tax ranks #5 of 42 states that tax wages, where #1 takes the most. Next door, the top rate is higher in Wisconsin and lower in Missouri, Indiana, Kentucky and Iowa; the Wisconsin state income tax page has its rates. Georgia income tax has the closest top rate, followed by Alabama and South Carolina. The state income tax rates for 2026 page compares all of them.
How this is calculated
- Each state's income tax on the same $75,000 salary, single filer, under its rules for 2026.
- States without a wage income tax are left out of this rank.
- The reference worker is a single filer with one job, paid every two weeks, with a standard Form W-4 and no pre-tax deductions, under 65.
How is Illinois income tax withheld from a paycheck?
Employers withhold Illinois income tax from each paycheck, using the Form IL-W-4 each employee fills in. On a $75,000 salary paid every two weeks, that is $137.22 a paycheck.
Employer withholding tables can differ from the yearly tax owed; the return settles the difference.
How this is calculated
- Employers withhold 4.95% of pay after the exemption allowances claimed on Form IL-W-4 (Booklet IL-700-T), with no income limit on the allowances. Paychecks here assume Form IL-W-4 claims each person on the return ($2,925 each) and each filer 65 or older ($1,000 each).
Questions people ask
How much Illinois tax is withheld from a bonus?
Employers can withhold Illinois tax on a bonus at a flat 4.95%. The return settles the actual tax on it.
Does Illinois tax overtime and tips?
Yes. Illinois taxes overtime and tips in full. Federal law lets workers deduct qualified tips and the extra half of overtime pay, within limits, from 2025 to 2028, but Illinois has not adopted that.
Do 401(k) contributions lower Illinois income tax?
Yes. Traditional 401(k) contributions lower Illinois taxable wages, as they do for federal income tax.