2026 Illinois Paycheck Calculator
Updated 2026 · IRS Pub 15-T · SSA · Illinois DOR · Private browser calculation
On a $100,000 salary in Illinois, a single filer keeps about $74,230 take-home per year (25.8% effective tax rate) after federal, Illinois state, and FICA withholding in 2026.
2026 data verified · Last checked June 11, 2026
In Illinois, a single filer earning $75,000 per year takes home approximately $57,880 after taxes (2026). Federal tax: $7,670 | Illinois state tax: $3,713 | FICA: $5,738.
22.8% effective tax rate
Illinois uses a flat-rate state income tax structure, meaning the same marginal rate applies across income levels for withholding purposes. Your Illinois state withholding amount scales with your gross pay and filing status, but it does not climb through multiple state tax brackets the way progressive systems do. Federal income tax and FICA still apply on top of state withholding.
See how all 51 states rank for take-home pay in our Best States for Take-Home Pay 2026 research study.
Most W-2 paychecks in Illinois include several standard withholding categories. Your employer uses IRS Publication 15-T tables for federal income tax, then applies payroll taxes and any state or local taxes required for your work location.
Your annual salary is the same whether you are paid weekly, biweekly, semi-monthly, or monthly, but each paycheck amount differs because the number of pay periods changes. Weekly pay divides your annual gross into 52 checks; biweekly into 26; semi-monthly into 24; and monthly into 12. Withholding tables account for pay frequency, so per-check federal and state amounts may not be a simple annual total divided evenly. Comparing offers or budgeting often requires looking at both per-paycheck net and annual take-home together.
Filing status — Single, Married Filing Jointly, or Head of Household — changes the withholding brackets your employer uses for federal income tax and, in most states with income tax, for state withholding as well. Two employees earning the same salary in Illinois can have different net pay if their filing status or W-4 entries differ. Updating your W-4 after a marriage, divorce, or dependent change is the most common way to align withholding with your expected tax situation.
See take-home pay for common jobs in Illinois after federal and state taxes:
Pre-tax 401(k) reduces federal and most state taxable wages but does not reduce Social Security or Medicare wages. See pre-tax ordering in our methodology →
At a $75,000 salary (single, biweekly, standard deduction), maxing a $4,300 HSA contribution changes biweekly take-home from $2,226 to $2,118.
HSA contributions are pre-tax for federal, FICA, and most state income taxes. FSA contributions follow similar pre-tax treatment through Section 125 cafeteria plans.
Illinois applies a flat 4.95% state income tax rate to taxable wages instead of using multiple brackets.
Federal income tax and FICA are withheld separately, so the state line on your paycheck stays proportionate as income changes.
Illinois does not generally add a separate statewide local income tax layer to the default estimate shown in this calculator.
Use the calculator above to adjust salary, filing status, pay frequency, and deductions for a more specific Illinois paycheck estimate.
On the engine-backed $100,000 example used elsewhere on this page, Illinois produces an estimated annual take-home pay of $74,230 with an effective total tax rate of 25.8%.
Illinois is a flat-tax wage state.
The practical payroll consequence is that the state line on a pay stub is more predictable than in a progressive state. Once wages are adjusted for withholding exemptions, the main Illinois state-income-tax effect scales at a single rate instead of stepping through multiple brackets.
Use this page with the Illinois bonus tax calculator when a supplemental paycheck uses flat withholding, or read how overtime is taxed in 2026 if extra hours push a pay period into a higher bracket. Equity-heavy roles should also model RSU vesting tax separately from base salary.
For relocation math, Illinois vs Indiana shows the same salary side by side. · State Income Tax Rankings 2026 · W-4 withholding optimization · 401(k) paycheck impact.
That makes Illinois useful for workers who want a simpler comparison than California or New York without moving all the way to a no-tax state.
Chicago does not impose a city wage income tax on employee paychecks, which is important because many searchers assume a large-city local tax applies automatically.
In Illinois, the standard paycheck deduction story is federal withholding, FICA, and the flat Illinois state-income-tax line. That means the state-vs-no-tax-state comparison is cleaner than in places where city or county withholding changes the result materially.
For job-offer decisions, Illinois often sits in the middle of the map. It does not offer the zero-state-tax advantage of Texas or Florida, but it also avoids some of the additional payroll-program complexity seen in states such as New York or New Jersey.
That makes the Illinois calculator valuable when you want a straightforward read on how much a flat state rate trims net pay at common salary bands.
Compare Illinois directly with no-tax or nearby alternatives:
Net pay is the amount you actually receive after payroll deductions. It starts with gross pay, then subtracts federal income tax, Social Security, Medicare, state or local tax, and any voluntary deductions.
Take-home pay equals gross pay minus taxes and deductions. A paycheck calculator applies federal withholding, FICA, state income tax, local taxes where applicable, and pre-tax or post-tax deductions in the correct order.
Gross pay is earnings before deductions. Net pay is what remains after payroll taxes, benefits, retirement contributions, insurance premiums, garnishments, and other paycheck deductions.
Pre-tax deductions can reduce taxable wages before income tax is calculated. A 401(k), HSA, or FSA may lower federal and state taxable income, but some deductions do not reduce Social Security or Medicare wages.
Post-tax deductions are taken after payroll taxes are calculated. Examples may include Roth 401(k) contributions, certain insurance payments, wage garnishments, or after-tax benefits.
Yes. Illinois has a flat individual income tax rate of 4.95% in 2026. The rate is applied to Illinois net income after allowed exemptions and subtractions.
A single filer earning $75,000 in Illinois should expect roughly $3,400 to $3,800 of Illinois income tax for the year after the personal exemption. This is an estimate and does not include federal tax or FICA.
Illinois is a flat-tax state, so the state calculation is simpler than graduated-rate states. However, local costs and benefit deductions can still make actual take-home pay differ from a simple 4.95% estimate.
Illinois does not tax Social Security benefits. It also subtracts many federally taxable retirement distributions from Illinois income, including qualifying pension, IRA, and 401(k) income.
Assumptions: Single filer · Standard deduction · Biweekly pay · No pre-tax deductions · Estimates paycheck withholding, not final tax liability · Source: state DOR + IRS Pub 15-T, 2026
Tax rates verified for 2026 tax year.
ExactTakeHome starts with gross pay, applies your pay frequency, subtracts eligible pre-tax deductions (401k, HSA, FSA) from federal taxable wages, calculates federal income tax withholding using IRS Publication 15-T percentage method tables, applies Social Security (6.2% up to $184,500 wage base) and Medicare (1.45%) taxes on gross wages, then applies Illinois state income tax using the 2026 withholding tables from the Illinois Department of Revenue. Local tax is applied where available (NYC, Philadelphia, Columbus OH). Final take-home is an estimate of paycheck withholding, not your final tax return liability.
Calculate your Illinois take-home pay after federal withholding, FICA, state taxes, local taxes, and pre-tax deductions.
Pre-tax deductions like 401(k), HSA, and health insurance premiums reduce your taxable wages before federal income tax is calculated. This means you pay less tax on every paycheck — not just defer the money.
Why take-home increases: A 6% 401(k) contribution on $75,000 reduces taxable wages by $4,500, cutting both federal income tax and Illinois state income tax on that amount. Social Security and Medicare still apply to the original gross wages.
Pay frequency changes your paycheck size, not your annual salary. Withholding tables annualise each paycheck, so weekly and monthly results may differ slightly from biweekly.
Based on $75,000 annual salary, single filing status, no pre-tax deductions, Illinois withholding. Use the calculator above for your exact filing status and deductions.
Illinois does not use a graduated state income tax for wages, but reciprocity with several neighboring states can matter for commuters. Local governments in Illinois generally do not impose a separate city income tax on wages the way some other states do.
Illinois uses a flat state income tax for wages. It does not use graduated state income tax brackets for regular employee pay.
Illinois still has a state income tax even though it is flat. Your employer withholds it during the year so you do not have to pay the full amount only when filing.
Quick answer: $100,000 after taxes in Illinois (2026)
Estimated take-home pay: $74,230/year ($6,186/month · $2,855/biweekly). Effective tax rate: 25.8%.
Illinois paychecks start with federal income tax withholding under IRS Publication 15-T, which directs employers to use the wage bracket or percentage method based on taxable wages, pay period, Form W-4 information, and filing status.
FICA applies in addition to federal income tax. Social Security is 6.2% on wages up to $184,500 in 2026, Medicare is 1.45% with no wage cap, and employers must withhold the 0.9% Additional Medicare Tax once an employee's wages exceed $200,000 in a calendar year.
Illinois uses a flat state income tax withholding rate. The 2026 IL-700-T withholding tables state that Illinois Income Tax withholding is 4.95%, generally applied after subtracting Illinois withholding exemptions from wages, and the 2026 exemption allowance is $2,925.
Illinois unemployment insurance is an employer tax with a 2026 wage base of $14,250 and is not deducted from employee take-home pay. Estimates assume standard 2026 withholding, single filing status, and no pre-tax deductions. Actual paycheck may differ.
| Tax | 2026 Rate | Wage Cap | Source |
|---|---|---|---|
| Federal Income Tax | 10%–37% (percentage-method withholding) | No wage cap | IRS Pub. 15-T |
| Social Security | 6.2% employee withholding | $184,500 | SSA 2026 |
| Medicare | 1.45% employee withholding | No wage cap | IRS Pub. 15 |
| Additional Medicare Surtax | 0.9% on wages over $200,000 | No wage cap | IRS Pub. 15 |
| Illinois State Income Tax | 4.95% flat withholding rate | No wage cap | IL DOR IL-700-T 2026 |
Local taxes in some cities change your take-home pay beyond the state rate.
Some cities and counties in Illinois set wage floors above the statewide rate. Use these verified local pages when you need the current ordinance rate before moving into a paycheck estimate.
Compare two salary offers in different states
Compare Illinois take-home with other states:
The Illinois paycheck calculator computes your exact take-home pay for 2026.
For a $75,000 salary, a single filer in Illinois takes home $57,880 per year ($2,226 per biweekly paycheck) after federal and state taxes.
Example Calculation — $75,000 Salary
$75,000 salary in Illinois
$57,880/year
$2,226 per biweekly paycheck
22.8% effective tax rate| Federal income tax | -$7,670 |
| Social Security (6.2%) | -$4,650 |
| Medicare (1.45%) | -$1,088 |
| Illinois state tax | -$3,713 |
Assumptions: Single filer · Biweekly · No 401(k) · Standard W-4 · Customize below ↓
Illinois uses a flat 4.95% state income tax rate on all taxable wages in 2026. For a single filer earning $100,000, the effective Illinois state income tax rate is approximately 4.95%, and the annual take-home pay is approximately $74,230 after all taxes.
Use the calculator above to enter your exact salary, filing status, and pre-tax deductions for a precise Illinois take-home pay estimate.
Illinois uses a flat state income tax, so wages are generally taxed under a single statewide income tax structure rather than graduated brackets. For most employees, this means state withholding is more predictable than in progressive-tax states.
ExactTakeHome tax data is sourced from official government publications and verified against primary sources. Last verified: .