Illinois Paycheck Calculator

Illinois Paycheck Calculator: Estimate Your Take-Home Pay

Our Illinois paycheck calculator will show you how much you will take home after federal taxes and Illinois taxes. Whether you are paid a salary or hourly, get your Illinois paycheck. This guide explains how those figures are calculated for the 2026 tax year: Illinois’s flat state income tax, federal income tax, Social Security, Medicare, and typical paycheck deductions. You’ll find a fully worked example for both salaried and hourly pay, a plain language look at Illinois’s reciprocity agreement with neighboring states, and answers to the specific questions Illinois workers ask for most from the hourly paycheck calculator.

How Illinois Paycheck Taxes Work

The Illinois paycheck calculator has a flat state income tax rate on all taxable income, regardless of how much a worker earns. That rate is 4.95% starting with the 2026 tax year, the Illinois Department of Revenue said. The federal system employs progressive tax brackets that rise as income rises. Calculate my paycheck Illinois imposes the same percentage on all taxpayers.

Illinois also does not have any local or city income taxes anywhere in the state, even in Chicago. That means you won’t see a separate line for municipal tax on an Illinois paycheck calculator, as you might in other states where a city or county adds its own income tax to the state rate.

In addition to calculate my paycheck illinois, all workers pay federal income tax based on IRS tax brackets and the elections they made on Form W-4, plus FICA taxes (Social Security and Medicare), which fund federal retirement and health insurance programs. Those four pieces federal tax, Illinois state tax, Social Security and Medicare are the main pieces that are withheld from a typical illinois paycheck calculator.

Illinois Paycheck Calculator Formula: How to Calculate My Paycheck

3 steps to figuring out your own paycheck First, take your gross pay and remove any pre-tax deductions to arrive at your taxable income:

Gross Pay – Pre Tax Deductions = Federal & State Taxable Income

Then total up all withholdings from that taxable income:

Federal Income Tax + Illinois State Income Tax (4.95% x taxable income) + Social Security (6.2% up to yearly wage base) + Medicare (1.45%, plus a 0.9% surtax beyond relevant threshold) = Total Tax Withheld

Finally, reduce your total tax and any post-tax deductions from your gross income to arrive at your net, or take-home pay:

Gross Pay − Total Tax Withheld − Post-Tax Deductions = Net Pay (Take Home)

Worked example: Calculate a paycheck for a single filer with an annual salary of $68,000 paid biweekly (26 pay periods per year), who pays 5% of each paycheck to a 401(k).

Gross Pay each paycheck = $68,000 ÷ 26 = $2,615.38 Pre-Tax 401(k) Deduction = $2,615.38 × 5% = $130.77. $2,615.38 – $130.77 = $2,484.61Taxable Income

Federal Income Tax (approximate amount using IRS withholding tables for this wage and filing status, assuming standard W-4 elections) ≈ $210.00 Illinois State Tax = $2,484.61 * 4.95% ≈ $123.00 Social Security = $2,615.38 at 6.2% = $162.15 Medicare = $2,615.38 x 1.45% ≈ $37.92

Total Tax Withheld ≈ $210.00 + $123.00 + $162.15 + $37.92 = $533.07 

Net Pay = $2,615.38 – $130.77 (pre-tax deduction) – $533.07 (total tax) = $1,951.54 per paycheck

The federal amount shown above is only an estimate. The salary calculator for Illinois you actually have withheld for federal income tax will depend on the selections you made on your W-4 and the IRS withholding tables for the current year. The salary calculator Illinois, Social Security and Medicare lines are fixed percentages and will be identical for any worker at this income level that has not passed the Social Security pay base.

Hourly Paycheck Calculator: Illinois Wages and Overtime

There is one more step to the hourly paycheck calculator Illinois before the tax calculation: that is to transform the hours worked into gross compensation. Under the federal Fair Labor Standards Act (FLSA), most employers must pay their hourly employees 1.5 times their regular rate for hours worked in excess of 40 in a week.

Regular Pay = Hourly Rate x Regular Hours (40 hours max per week) Overtime Pay = Hourly Pay × 1.5 × Overtime Hours (hours worked above 40 per week) Gross Pay = Regular + Overtime Pay

If you have gross pay, the same procedures from the salary calculation above apply for federal tax, Illinois state tax, Social Security and Medicare.

Worked example: An hourly worker makes $24/hour and works 46 hours in a week with a $25 pre-tax health insurance deduction.

Regular Pay = $24 x 40 = $960.00 Overtime Pay = $24 x 1.5 x 6 = $216.00 Gross Pay = $960.00 + $216.00 = $1,176.00

Taxable Income = $1,176.00 – $25.00 = $1,151.00

Federal Income Tax (approx.) ≈ $95.00 Illinois State Tax: $1,151.00 x 4.95% = $57.00 Social Security = $1,176.00 X 6.2% = $72.91. Medicare = $1,176.00 × 1.45% = $17.05

Total Tax Withheld ≈ $95.00 + $57.00 + $72.91 + $17.05 = $241.96 

Net Pay = $1,176.00 – $25.00 (pre-tax deduction) – $241.96 (total tax) = $909.04 for the week

Overtime pay itself isn’t taxed at a special rate. It just gets added to gross pay for that pay period, which is why a huge overtime week can occasionally drive more income into a higher federal withholding calculation for that one check even if your annual tax situation balances out when you file.

Every Deduction From Your Illinois Paycheck

Here’s a side-by-side look at every line that typically comes out of an Illinois paycheck.

Every one of these lines can appear on the same pay stub and understanding what each one represents makes it much easier to see exactly where your gross pay goes before it becomes take-home pay.

Illinois Tax Reciprocity: Working Across State Lines

The Illinois paycheck calculator has a formal tax reciprocity agreement with 4 bordering states: Iowa, Kentucky, Michigan and Wisconsin. Basically, if you live in one of those four states and work in Illinois, you usually only pay income tax to your home state not Illinois. The opposite is also true. In general, if you live in Illinois but work in Iowa, Kentucky, Michigan or Wisconsin, you pay only Illinois income tax (not the state in which you are physically working).

But if the employer in the non-resident state does nothing, then the employer will most likely withhold the tax of that state by default. In most cases, if an eligible nonresident is working in Illinois, he or she will need to file Form IL-W-5-NR (Employee’s Statement of Nonresidence in Illinois) with his or her employer to prevent unnecessary Illinois withholding. This tells the employer to stop withholding Illinois tax because the reciprocity agreement says it is not owed.

This is a huge thing for many hourly paycheck calculator illinois area commuters, particularly closer to the Iowa, Wisconsin and Kentucky borders, where crossing state lines for work is common. If you are not sure about reciprocity in your situation, contact the Illinois Department of Revenue and the payroll department of your company.

Understanding Your Illinois W-4 (IL-W-4)

In addition to the federal Form W-4, Illinois workers will complete the Form IL-W-4, Illinois Withholding Allowance Certificate. This document shows your employer how many with holding allowances you have to use in figuring your Illinois state tax withholding. That affects the amount of state tax taken out of each paycheck.

The fewer allowances you claim the more money will come out. Calculate my paycheck illinois. The more allowances you claim the less. The number of allowances you claim should be based on your own financial situation such as additional income, dependents and whether you’d like a bigger paycheck during the year or a bigger refund when you file your tax return. This page does not recommend a number of allowances or a specific election. The right one depends on unique circumstances that a tax professional or the Illinois Department of Revenue’s instructions for Form IL-W-4 can help you work out.

Illinois paycheck calculator: From Annual Salary to Per-Paycheck Amount

If you know your annual salary, a salary calculator Illinois can help you figure out the gross amount per paycheck is all dependent on how often you are paid. The common pay frequencies are weekly (52 pay periods), biweekly (26 pay periods), semi-monthly (24 pay periods), and monthly (12 pay periods).

Gross Pay / Paycheck = (Annual Salary) / (Pay Periods in a Year)

Worked example: An employee earns $82,500 a year and is paid semi-monthly.

Gross Pay per Paycheck = $82,500 / 24 = $3,437.50

Then, the identical federal tax, Illinois state tax, Social Security and Medicare calculations from the formula section above are applied for each $3,437.50 Illinois pay calculator. Note: Semi-weekly and biweekly pay are sometimes mistaken. Biweekly is every two weeks (26 paychecks a year) and semi-monthly is twice a month, on set dates like the 15th and the final day of the month (24 payments a year), so make sure to double-check which one pertains to your actual pay schedule.

Illinois State Tax Calculator: Estimating Just Your State Tax

If you only need to estimate the Illinois portion of your paycheck deductions, the formula is simple, since Illinois uses one flat rate rather than a bracket system:

Illinois State Tax = Taxable Income × 4.95%

Worked example: A worker has $54,000 in Illinois taxable income for the year.

Illinois State Tax = $54,000 × 4.95% = $2,673.00 for the year

To find the  Illinois state tax calculator, divide that annual figure by your number of pay periods. For someone paid biweekly (26 times a year), that works out to $2,673.00 ÷ 26 ≈ $102.81 withheld for Illinois state tax per paycheck.

Conclusion

The Illinois paycheck calculator formula contains the same basic ingredients whether you are salaried or hourly: a flat 4.95% state tax, federal income tax based on your W-4, social security, Medicare, and any pre-tax or post-tax deductions that apply to you. This article walks you through both the tax calculator Illinois and calculate income tax Illinois types with full worked examples, a thorough deduction breakdown, and the state-specific restrictions that calculators omit, such as reciprocity and the IL W-4. Please remember that this page and the above home salary estimator are only and are provided for general information purposes only, not tax or legal advice. Your employer’s payroll department or a competent tax professional can verify the actual numbers for you. Use the calculator above to obtain your own projected Illinois.

FAQs

Q1. How much is Illinois state income tax, and does it change based on how much I earn?

The Illinois paycheck calculator has one of the simplest tax systems in the country, with a flat income tax rate (4.95% for the 2026 tax year) that applies to all taxable income, regardless of how much you make. This differs from the progressive brackets of the federal system where the rate goes up as income levels rise. Always verify with the Illinois Department of Revenue for the precise rate for the current year, as state tax rates might fluctuate.

Q2. Do I pay any local or city income tax in Illinois, like in Chicago?

No, the Illinois payroll calculator does not have any local or city income taxes anywhere in the state, even in Chicago. In Illinois, payroll deductions are limited to federal tax, the flat state tax, and FICA (Social Security and Medicare).

Q3. I live in Wisconsin (or Iowa, Kentucky, or Michigan) but work in Illinois. Do I pay Illinois income tax?

Usually no. The Illinois state tax calculator has a reciprocity agreement with these four states, so people who live in one of them and work in the other often pay income tax solely in their home state. You’ll normally need to file an exemption form, like Form IL-W-5-NR, with your employer to end unnecessary Illinois withholding.

Q4. Why did my paycheck get smaller even though my hourly rate or salary didn’t change?

Common reasons include a mid-year change to your W-4 or IL-W-4 elections, a new or increased benefits deduction (for example, a health insurance premium change during open enrollment), crossing an annual wage base limit for one deduction but not another, or the additional 0.9% Medicare tax starting to apply after a raise or bonus pushes your wages over the applicable threshold.

Q5. How does overtime pay get taxed differently in Illinois?

Overtime hours are not taxed at some special higher rate. It’s still ordinary income for tax reasons, figured just like your regular pay would be. But a larger paycheck in a specific pay period can temporarily shift more of that period’s income into a higher federal withholding computation, which can sometimes make overtime appear more heavily taxed than it actually is until you complete your annual tax return.

Q6. Does contributing to a 401(k) or HSA actually increase my take-home pay?

No, not at all. Pre-tax contributions diminish your paycheck because that money is taken out before you even receive it. But they also cut the income that is taxed by the federal government and Illinois, which reduces your total tax burden, compared to not contributing at all, even if your take-home cash now is less. paycheck.