Does Illinois have a flat or progressive income tax?

Flat. Doesn't matter if you earn $40,000 or $400,000 — everyone pays 4.95%. There was a 2020 ballot measure to switch to graduated rates, but voters shot it down. So the flat rate stays.

Are there local taxes in Illinois?

Nope. No city income tax on your paycheck anywhere in Illinois. Some cities pile on higher sales taxes, but that's a different story. One less line item to stress about compared to places like New York or Philadelphia.

How to Calculate Your Take-Home Salary in Illinois

Illinois keeps it simple: flat 4.95% state income tax. Plug in your salary and see exactly what you take home after federal, state, FICA, and the rest.

Steps

Enter your gross annual salary

Type your total yearly pay — before anything gets taken out. Paid hourly? Enter your rate and weekly hours instead. The tool handles the annual conversion.

Select Illinois as your state

Pick Illinois from the dropdown. It applies the flat 4.95% rate automatically. And here's the nice part — no local income taxes in Illinois. Way simpler than dealing with New York or Ohio.

Add pre-tax deductions

Got a 401(k)? HSA? Other pre-tax stuff? Enter those here. They shrink your taxable income, so your actual tax bill ends up lower than what the gross salary would suggest.

Review your pay breakdown

You'll see federal tax, Illinois state tax, Social Security (6.2%), Medicare (1.45%), and your net take-home. Both annual and per-paycheck figures show up depending on how often you get paid.

Illinois Tax Basics for Salary Planning

Compared to most states, Illinois is pretty straightforward. Flat 4.95% state income tax — no bracket math to deal with. Federal taxes still follow the usual progressive brackets, so that's where most of the paycheck complexity comes from. One thing worth knowing: Illinois doesn't tax retirement income. Comparing job offers between Illinois and another state? Factor in that your future pension or 401(k) withdrawals won't get taxed at the state level. That matters way more than you'd think when you run the long-term numbers. But here's the catch — Illinois has some of the highest property taxes in the country. The low income tax rate gets partially eaten up by property tax rates averaging 2.07%. That's almost double the national average.