This Illinois paycheck calculator estimates what is left from 2026 wages after federal income tax, Illinois income tax, Social Security, and Medicare. Illinois taxes individuals at a flat 4.95% of net income. That rate has been in place since 1 July 2017, and the Illinois Department of Revenue still lists it as the individual rate. The 2026 personal exemption is $2,925. A single filer gets one exemption. Married filing jointly gets two, which is $5,850, unless federal adjusted gross income is over the cap that removes the exemption entirely.
The sample is $65,000, single, paid every two weeks, with no traditional 401(k). Federal income tax uses the tax year 2026 brackets and standard deduction in IRS Revenue Procedure 2025-32. Social Security is 6.2% of wages up to $184,500, and Medicare is 1.45% of all wages, the employee rates in IRS Publication 15 for 2026. Additional Medicare Tax withholding is 0.9% of wages over $200,000. Illinois does not add a state standard deduction on top of the exemption. The result is an annual estimate divided by the number of paychecks. It is not the withholding method in the 2026 IL-700-T tables, and Form IL-1040 rounds tax to the nearest dollar.
How to use this calculator
- Enter annual gross wages in dollars. The sample, 65000, means $65,000 for the year, not one paycheck.
- Choose Single or Married filing jointly. Joint uses the joint federal brackets, the $32,200 federal standard deduction, and two Illinois exemptions, all on this salary only.
- Choose a pay frequency. Every two weeks means 26 paychecks. Twice a month means 24. Weekly is 52 and monthly is 12.
- Enter a traditional 401(k) deferral for the year, or leave 0. The deferral is capped at wages and at the $24,500 elective limit. Press Calculate.
How a 2026 Illinois paycheck is estimated
Federal taxable wages are gross wages minus the traditional 401(k) actually applied, then minus the federal standard deduction. For 2026 that deduction is $16,100 for a single filer and $32,200 for married filing jointly. Tax on what remains uses the Revenue Procedure 2025-32 brackets. On $65,000 with no deferral, a single filer has $48,900 of federal taxable income and $5,620.00 of federal income tax. Social Security on those wages is $4,030.00. Medicare is $942.50. Additional Medicare Tax is $0.00. A 401(k) does not reduce Social Security or Medicare.
Illinois starts from a different base. This page treats wages minus the traditional 401(k) as federal adjusted gross income, because a pre-tax deferral is excluded from AGI. The exemption comes off that amount, and 4.95% applies to what is left. On the $65,000 single sample the exemption is $2,925, the Illinois base is $62,075, and 4.95% of $62,075 is $3,072.7125, which rounds to $3,072.71. There is no bracket table. The next dollar of Illinois base is taxed at the same 4.95%.
The exemption is one amount or nothing. The Department’s answer says the allowance is not allowed when federal AGI exceeds $250,000 for a return that is not married filing jointly, or $500,000 for married filing jointly. At exactly $250,000 of wages and no deferral, the single exemption is still $2,925 and Illinois tax is $12,230.21. At $250,001 the exemption drops to $0.00 and Illinois tax is $12,375.05. That is a cliff, not a phase-out. The extra dollar of wages also moves federal tax and Medicare by a few cents, so annual take-home falls from $170,951.79 to $170,807.61, a drop of $144.18. The Illinois line itself jumps by $144.84.
Annual take-home is wages minus federal income tax, Social Security, Medicare, Additional Medicare Tax, Illinois tax, and the deferral. Dividing by 26 and rounding to the cent is the headline. Twenty-six times that headline can miss the annual figure by a few cents. The sample annual take-home is $51,334.79, and the headline is $1,974.42 every two weeks.
Formula
Tax year 2026. Illinois wages. Federal taxable wages = max(0, wages − traditional 401(k) − federal standard deduction) Federal standard deduction = $16,100 single, or $32,200 married filing jointly 401(k) applied = min(amount entered, wages, $24,500) Federal income tax = 2026 Rev. Proc. 2025-32 brackets Social Security = 6.2% × min(wages, $184,500) Medicare = 1.45% × wages Additional Medicare Tax = 0.9% × max(0, wages − $200,000) Illinois AGI proxy = max(0, wages − traditional 401(k)) Exemption = $2,925 single, or $5,850 married filing jointly, and $0 when that AGI proxy exceeds $250,000 single or $500,000 joint Illinois tax = 4.95% × max(0, Illinois AGI proxy − exemption), rounded to the cent Annual take-home = wages − federal income tax − Social Security − Medicare − Additional Medicare Tax − Illinois tax − 401(k) Paycheck = annual take-home ÷ number of paychecks
The same $65,000, single, with no deferral, is the Texas sample as well. Texas income tax is $0, so that page’s annual take-home is $54,407.50. Illinois annual take-home is $51,334.79. The entire $3,072.71 gap is the Illinois tax. Federal income tax, Social Security, and Medicare match. Washington at the same wages also starts from those federal lines and then subtracts Paid Leave and WA Cares instead of a 4.95% income tax.
A joint return on the same $65,000 has federal income tax of $3,440.00, which is $2,180.00 below the single figure, and Illinois tax of $2,927.93. The federal gap is not 12% of the extra $16,100 of standard deduction. That slice, from $32,800 of taxable income up to $48,900, does sit in the 12% band and is worth $1,932.00. The joint 10% band also runs $12,400 further than the single 10% band, and two percentage points on that $12,400 is another $248.00. Together those are the $2,180.00. The second Illinois exemption is $2,925 times 4.95%. After each tax is rounded to the cent, the Illinois lines differ by $144.78, not by a separately rounded $144.79.
On $65,000 single, a $6,500 traditional 401(k) cuts federal income tax from $5,620.00 to $4,840.00. That $780.00 is 12% of $6,500, because the deferral sits in the federal 12% band. Illinois tax falls from $3,072.71 to $2,750.96, a cut of $321.75, which is 4.95% of $6,500. Social Security stays $4,030.00 and Medicare stays $942.50. Annual take-home is $45,936.54, or $1,766.79 every two weeks. The deferral reduces both income taxes and the cash in the paycheck. It does not reduce FICA.
Worked 2026 Illinois paycheck examples
$65,000, single, every two weeks, no 401(k)
Federal income tax is $5,620.00, Social Security is $4,030.00, and Medicare is $942.50. Illinois income tax is $3,072.71 after the $2,925 exemption. Annual take-home is $51,334.79. The headline is $1,974.42 / two weeks. The New York page, outside New York City, keeps the same federal and FICA lines at this salary and charges $2,913.00 of state tax. Its annual take-home is $51,494.50. Illinois is $159.71 lower, and that $159.71 is $3,072.71 minus $2,913.00. The two states are not using the same kind of tax. New York has brackets and an $8,000 standard deduction. Illinois has one rate and an exemption.
A Florida paycheck at $52,000, single, every two weeks, and no deferral has the federal and FICA lines that belong to that salary and a state tax of zero. Annual take-home there is $43,962.00. The same inputs on this page produce Illinois tax of $2,429.21 and annual take-home of $41,532.79. The gap is the 4.95% tax. Florida does not have a $2,925 exemption to subtract, because it has no wage income tax for the exemption to reduce.
The same $65,000 filed jointly, and with a $6,500 deferral
Married filing jointly, still at $65,000, every two weeks, and no deferral, uses a $5,850 exemption. Illinois tax is $2,927.93. Federal income tax is $3,440.00. Social Security and Medicare do not change. Annual take-home is $53,659.57, or $2,063.83 / two weeks. The joint figure treats this salary as the only income on the return. A spouse with wages needs a return this one-wage form cannot build. The wider federal brackets would be shared, and the Illinois exemptions would still be two unless AGI is over $500,000.
Go back to single and enter a $6,500 traditional 401(k). Federal income tax is $4,840.00 and Illinois tax is $2,750.96. The exemption is still $2,925, because AGI is $58,500, well under $250,000. Annual take-home is $45,936.54. Cash pay falls by more than the tax savings, because the $6,500 itself is not in the paycheck. A deferral above $24,500 is cut back to that 2026 elective limit. Catch-up contributions are not added on this form.
$90,000 in the federal 22% band, and the exemption cliff at $250,000
At $90,000, single, every two weeks, and no deferral, federal income tax is $10,970.00, Social Security is $5,580.00, and Medicare is $1,305.00. Illinois tax is $4,310.21, which is 4.95% of $87,075. Annual take-home is $67,834.79, or $2,609.03 / two weeks. The Illinois math did not change shape when federal taxable income entered the 22% band. The state line is still one rate times wages after the exemption.
At $250,000, paid monthly, the exemption remains and Illinois tax is $12,230.21. Social Security has already stopped at $11,439.00 because wages are over the $184,500 base. Additional Medicare Tax is $450.00. Annual take-home is $170,951.79, or $14,245.98 / month. One dollar more, $250,001, removes the exemption. Illinois tax becomes $12,375.05 and the monthly headline becomes $14,233.97. Do not read the cliff as a one-dollar tax of $144. The exemption worth $2,925 of base, times 4.95%, leaves the return all at once.
2026 Illinois paycheck at selected wages
| Wages | Status | Federal income tax | Illinois tax | Annual take-home | Every two weeks |
|---|---|---|---|---|---|
| $40,000 | Single | $2,620.00 | $1,835.21 | $32,484.79 | $1,249.42 |
| $52,000 | Single | $4,060.00 | $2,429.21 | $41,532.79 | $1,597.42 |
| $65,000 | Single | $5,620.00 | $3,072.71 | $51,334.79 | $1,974.42 |
| $65,000 | Joint | $3,440.00 | $2,927.93 | $53,659.57 | $2,063.83 |
| $90,000 | Single | $10,970.00 | $4,310.21 | $67,834.79 | $2,609.03 |
| $120,000 | Single | $17,570.00 | $5,795.21 | $87,454.79 | $3,363.65 |
What this Illinois paycheck estimate leaves out
The federal line is an annual standard-deduction estimate, then divided by the number of paychecks. It is not the IRS Publication 15-T percentage method, and the Illinois line is not the wage-bracket withholding in the 2026 IL-700-T booklet. IL-700-T also uses a per-pay exemption allowance rather than one annual subtraction. Dependents, the extra $1,000 exemption for being 65 or blind, extra withholding, a second job, and head of household are not modeled. Married filing jointly applies the joint brackets and both exemptions to this salary alone.
Form IL-1040 rounds the computed tax to the nearest dollar. This page keeps the cent, because a paycheck is not that annual return. On the sample, $3,072.71 would be $3,073 on a dollar-rounded return. Property tax, which Illinois funds heavily at the local level, is not wage withholding. Neither is sales tax. Reciprocal agreements with Iowa, Kentucky, Michigan, and Wisconsin can change which state tax a cross-border worker owes. This form assumes the wages are Illinois wages of an Illinois resident with no credit for tax paid to another state.
Pre-tax health premiums, HSAs, and FSAs are not separate fields. A traditional 401(k) above $24,500 is cut back to that elective limit. Roth deferrals do not reduce federal AGI or the Illinois base, and this form has no Roth switch, so do not type a Roth amount into the deferral field. Illinois subtractions other than the exemption, including some retirement income that is subtracted on the return, are not applied to these wages.
Employer Social Security, employer Medicare, and unemployment taxes are not deducted. A bonus withheld at a flat supplemental rate will not match a row that assumes the bonus was ordinary wages spread over the year. Compare a dollar result with a dollar take-home. The England and Manitoba pages on this site are in other currencies and do not belong in the same subtraction.
Frequently asked questions
Does Illinois use a flat income tax rate in 2026?
Yes. The individual rate is 4.95% of net income, the rate in effect since 1 July 2017. On $65,000 of single wages with no 401(k), the tax is $3,072.71 after the $2,925 exemption. There is no Illinois bracket table on this page.
How large is the Illinois personal exemption on a 2026 paycheck?
The Department of Revenue sets the 2026 exemption at $2,925. This calculator allows one for a single filer and two, $5,850, for married filing jointly. At $65,000 those choices produce Illinois tax of $3,072.71 and $2,927.93. The extra $1,000 exemption for age 65 or blindness is not included.
Why is Illinois take-home lower than Texas at the same $65,000 salary?
Federal income tax, Social Security, and Medicare match. Texas state income tax is $0, so annual take-home is $54,407.50. Illinois tax is $3,072.71, so annual take-home is $51,334.79. The gap is the state tax and nothing else.
Does a traditional 401(k) reduce the 4.95% Illinois tax?
Yes on this page, because the deferral reduces the AGI proxy before the exemption and the 4.95% rate. A $6,500 deferral on $65,000 single cuts Illinois tax by $321.75, from $3,072.71 to $2,750.96, and cuts federal income tax by $780.00. Social Security and Medicare stay put.
What happens to the Illinois exemption when wages pass $250,000?
It disappears all at once for a single filer. At $250,000 the exemption is still $2,925 and Illinois tax is $12,230.21. At $250,001 the exemption is $0 and Illinois tax is $12,375.05. Married filing jointly keeps both exemptions until federal AGI exceeds $500,000. There is no sliding scale under the cap.
Why might an Illinois pay stub differ from this 2026 estimate?
Employers withhold from Publication 15-T and from IL-700-T using Form W-4 and Form IL-W-4, not from this annual standard-deduction calculation. Pre-tax health insurance, a bonus, a second job, or a pay count other than 26 will move the stub. The $65,000 single example is $1,974.42 every two weeks only under the assumptions on the page.
Related ClearCalc pages
- Pennsylvania paycheck calculator for 2026 The 3.07% state tax is charged on wages before a 401(k). At $65,000 single with no local tax, Pennsylvania tax is $1,995.50.
- Texas paycheck calculator for 2026 The same federal and FICA lines when the inputs match, with state income tax at $0.
- New York paycheck calculator for 2026 At $65,000 single, New York State tax is $2,913.00 rather than this $3,072.71 Illinois tax.
- California paycheck calculator for 2026 California brackets plus 1.3% State Disability Insurance, instead of a flat 4.95%.
- 2026 401(k) contribution calculator Check a deferral rate against the $24,500 limit before you type the dollar amount here.