Illinois does not use tax brackets. Every Chicago resident pays the same flat state income tax rate of 4.95 percent, whether they earn $30,000 or $3 million.1Illinois General Assembly. Illinois Compiled Statutes 35 ILCS 5/201 – Tax Imposed The state rate is only one layer of what you actually pay in Chicago, though. On top of it sit a 10.25 percent sales tax, a Cook County property tax bill that is usually the largest single tax a homeowner faces, and a set of city-specific charges on parking, streaming, real estate transfers, and more. So when people search for Chicago tax brackets, the honest answer is that there aren’t any at the state or city level for income; there are rates and layers, and the total depends on what you earn, what you own, and what you buy.
The Flat Illinois Income Tax Rate
Illinois applies 4.95 percent to the net income of every individual, trust, and estate.1Illinois General Assembly. Illinois Compiled Statutes 35 ILCS 5/201 – Tax Imposed Your Illinois net income starts from your federal adjusted gross income and is then adjusted by state-specific additions and subtractions. Once you have that figure, the math is one multiplication.
Chicago itself does not impose a separate municipal income tax. So the state rate is your income tax rate as a Chicago resident.
The Personal Exemption
For the 2026 tax year, you can subtract a $2,925 personal exemption from your Illinois base income. Spouses filing jointly each get $2,925, and each dependent claims the same amount. Taxpayers who are 65 or older, or legally blind, receive an additional $1,000 exemption.2Illinois Department of Revenue. What Is the Illinois Personal Exemption Allowance?
There is an income ceiling. If your federal adjusted gross income exceeds $500,000 on a joint return, or $250,000 for any other filing status, the personal exemption disappears entirely.3Illinois Department of Revenue. FY 2026-15 – What’s New for Illinois Income Taxes The same threshold eliminates the property tax credit and the K-12 education expense credit described below, so higher earners lose several offsets at once.
Credits That Reduce Your State Tax
After you compute your base tax at 4.95 percent, Illinois offers a handful of credits that reduce the final amount dollar for dollar. Claim them on Schedule ICR, attached to your IL-1040.4Illinois Department of Revenue. 2025 Form IL-1040 Instructions
Property Tax Credit
Homeowners who occupy the property as a principal residence can claim a credit equal to 5 percent of the property taxes paid on that home during the year.5Justia Law. Illinois Compiled Statutes 35 ILCS 5/208 – Tax Credit for Residential Real Property Taxes On a $10,000 property tax bill, that is a $500 reduction in state income tax. You will need your property tax bill and property index number to complete Schedule ICR. For multi-unit buildings, only the portion attributable to your own residence counts.
K-12 Education Expense Credit
Parents paying tuition, book fees, or lab fees for students in kindergarten through 12th grade at qualifying schools can claim 25 percent of those expenses after the first $250. The credit is capped at $750 per year, no matter how many students you have.6Illinois Department of Revenue. Pub-112 – Education Expense Credit General Rules Keep receipts; the Department of Revenue can ask for documentation during processing.
Illinois Earned Income Credit
Lower-income workers who qualify for the federal Earned Income Tax Credit can claim an Illinois version tied to a percentage of the federal amount. For tax year 2026, the state credit rises to 40 percent of the federal figure. It is refundable, so it can generate a refund even if you owe no state tax.
Chicago Sales Tax
The combined sales tax on general merchandise in Chicago is 10.25 percent, among the highest in the country. That figure is built from overlapping layers: the Illinois state base, a Cook County addition, the city’s home-rule sales tax, and a Regional Transportation Authority surcharge that funds the CTA and Metra.
Not everything is taxed at 10.25 percent. Grocery food not prepared for immediate consumption and qualifying medical appliances are taxed at a lower state rate of 1 percent, plus applicable local additions. Titled property like vehicles follows its own schedule. What you are buying matters as much as what you are paying.
Cook County Property Tax
Property tax is usually the largest single tax bill a Chicago homeowner pays, and it works nothing like income tax. There is no flat rate across the city. Your bill depends on your home’s assessed value, a state equalization multiplier, and the combined tax rates of every local district serving your address, including schools, parks, the city, and the water reclamation district.
How the Bill Is Calculated
The Cook County Assessor sets the fair market value of your home, then applies a 10 percent assessment level to arrive at the assessed value.7Cook County Assessor’s Office. Your Assessment Notice and Tax Bill A home valued at $350,000 has an assessed value of $35,000. The Illinois Department of Revenue then applies a state equalization factor to bring Cook County assessments in line with other counties. The most recent finalized equalization factor for Cook County was 3.0355 for tax year 2024.8Illinois Department of Revenue. 2024 Cook County Final Multiplier Announced The assessed value multiplied by that factor gives you the equalized assessed value (EAV), and your tax bill is the EAV times the composite rate of your taxing districts.
Homeowner Exemptions
Several exemptions reduce the EAV your rate applies to. They do not lower the rate itself.
- Homeowner Exemption. Available to anyone who owns and occupies the property as a primary residence. It provides an average savings of roughly $950 a year and renews automatically once granted.
- Senior Exemption. Homeowners age 65 or older who own and occupy the home get an additional reduction. This also renews automatically.
- Senior Freeze. Seniors with a total household income of $65,000 or less can freeze their EAV at the level it was when they first qualified, preventing assessment increases from raising the bill. Unlike the other two, the Senior Freeze must be filed every year.
The deadline to file exemptions for the 2025 tax year is May 15, 2026.9Cook County Assessor’s Office. Property Tax Exemptions Missing it means paying a higher bill for the whole year.
When Property Tax Is Due
Cook County property taxes come in two installments. For tax year 2025, the first installment is due April 1, 2026. Late payments carry a state-mandated penalty of 0.75 percent per month.10Cook County Property Tax Portal. Pappas Says Pay Property Tax Bills Online Now The second installment due date is announced later in the year once final tax rates are set.
Chicago-Specific Taxes You’ll Actually Encounter
Beyond sales and property tax, the city layers on charges that rarely show up in “brackets” discussions but meaningfully affect what it costs to live in Chicago.
Amusement Tax on Streaming
Chicago charges a 10.25 percent amusement tax on electronically delivered entertainment, including video streaming subscriptions, audio streaming services, and online games.11City of Chicago. Amusement Tax On a $15.99 monthly streaming subscription, roughly $1.64 is Chicago amusement tax. Providers collect it and remit it directly to the city.
Parking Tax
Parking in Chicago carries a 23.25 percent tax on the amount paid, whether daily, weekly, or monthly, including valet.12City of Chicago. Parking Tax A $300-per-month garage spot means nearly $70 in tax alone.
Real Property Transfer Tax
When real estate changes hands in Chicago, the transaction triggers a transfer tax of $5.25 per $500 of sale price. The buyer is responsible for $3.75 of that amount and the seller for $1.50.13City of Chicago. Real Property Transfer Tax On a $400,000 home purchase, the city transfer tax totals $4,200. Cook County and state transfer taxes are separate.
Personal Property Lease Transaction Tax
Businesses and individuals leasing tangible property, software, or cloud services in Chicago pay a 15 percent lease transaction tax as of January 2026. It applies to office equipment leases and to software-as-a-service subscriptions used by Chicago residents and Chicago-based companies.
Bottled Water Tax
Every bottle of water sold at retail in Chicago carries a flat $0.05 tax per bottle, collected by the wholesaler or retailer.14City of Chicago. Bottled Water Tax
Filing Deadlines and Late Penalties
The deadline to file your 2025 Illinois income tax return (Form IL-1040) is April 15, 2026.15Illinois Department of Revenue. 2026 Tax Filing Season Begins Today for Individuals If you can’t file by then, Illinois automatically grants a six-month extension to October 15, 2026. No separate form is needed to get it.16Illinois.gov. Illinois Department of Revenue Urges Taxpayers to Act Now Ahead of April 15 Filing Deadline
The extension buys time to file, not time to pay. If you owe tax, the full amount is still due April 15. Use Form IL-505-I to submit an estimated payment and avoid penalties while you finish the return.16Illinois.gov. Illinois Department of Revenue Urges Taxpayers to Act Now Ahead of April 15 Filing Deadline
Filing late without an extension triggers a two-tier penalty. The first tier is 2 percent of the tax due, capped at $250. If you still haven’t filed 30 days after the Department of Revenue sends a nonfiling notice, a second penalty applies, equal to the greater of $250 or 2 percent of the tax owed, capped at $5,000.17Legal Information Institute. Illinois Admin Code Title 86 Section 700.300 – Penalty for Late Filing or Failure Interest accrues daily on any unpaid balance starting the day after the due date, at a rate tied to the federal underpayment rate and reset every January 1 and July 1.18Illinois Department of Revenue. Penalties and Interest for Illinois Taxes Small balances grow quickly when penalties and daily interest run at the same time.