Learn About Illinois State Taxes

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Illinois cities have some of the highest taxes in the country. Chicago even charges a special tax on soda. The Illinois state income tax is a steep 4.95% flat rate.

Illinois Property Tax

The state of Illinois receives no revenue from property taxes—all the money goes to local municipalities. According to the Illinois Department of Revenue, 62% of local property tax revenue goes to school districts for education. 

In Illinois, there is a 1-year lag in the property tax cycle. The property is assessed on January 1, and property tax is paid on that assessment in the following year. The property is assessed at 33.33% of its market value. 

Cook County—the state's largest county, which includes Chicago—uses a computer model that determines value based on comparable home sales over a 5-year period and limits the valuation of single-family homes to 16% of market value. Farmland in Illinois is assessed based on its ability to produce income. 

Property Tax Exemptions

Illinois has several exemptions that reduce your property tax by reducing the assessed value of your home. The General Homestead Exemption can be claimed for up to $5,000 for single-family homes that are the primary residence of the owner. A tenant with a legal interest in the property and an obligation to pay property taxes can also claim this exemption. 

The Long-Time Occupant Homestead Exemption is available to Cook County residents who have lived in their home as their primary residence for 10 years or more (5 years if the home was purchased by ​the government or with non-profit assistance). To qualify for this exemption, your income must be less than $100,000 a year. The maximum exemption amount is $10,000.

There are also exemptions for senior citizens, a $2,000 exemption for the disabled, an exemption for disabled veterans of up to $70,000, and an exemption for home improvements after a catastrophic event.

Besides exemptions, there is a limit on the amount property taxes can increase over the prior year, this is known as the Property Tax Extension Limitation Law (or "tax caps”). This law limits the increase in total property taxes on existing property to whichever is less–either 5% or the increase in the national Consumer Price Index (a measure of inflation) for the year preceding the tax year. If more revenue is needed by taxing districts, this limitation can be increased with voter approval. 

Illinois Income Tax

Illinois income tax is levied at a flat 4.95% rate regardless of income level. A deduction of $2,000 is allowed for each exemption claimed on your federal return. You can also receive an additional $1,000 exemption if you or your spouse is 65 or older, legally blind, or both. 

There are no deductions allowed, as this is a flat tax system, but there are credits available for taxes paid to another state, property taxes paid, and expenses paid for your child’s school. A refundable Earned Income Credit (EIC) is available for those who received the federal EIC credit. The total amount of the Illinois Earned Income Credit is 5% of the credit on your federal return. Illinois income tax returns (Form IL-1040) are due annually on April 15.

Additional Illinois State Taxes

State taxes underwent a dramatic increase on July 1, 2019 as part of the "Rebuild Illinois" campaign to rebuild deteriorating infrastructure:

  • Sales Tax: The state sales tax rate is 6.3% in 2019. Prescription and non-prescriptions drugs, medical equipment, and qualifying food purchases are only taxed at 1%. Localities can add up to 2.75% of their own sales taxes, which can bring total sales tax rates up to 9.05% in some areas.​ In Chicago, the total sales tax is 10.25%.
  • Gasoline Tax: 39 cents per gallon for unleaded. Chicago and Cook County are authorized to add additional taxes of 5 cents and 6 cents. Diesel is taxed at 45.5 cents per gallon.
  • Cigarette Tax: $2.98 per pack of 20. According to The Campaign for Tobacco-Free Kids, Chicago has the second highest cigarette taxes in the country. Three other Cook County cities made the top 10: Evanston ranked third; Cicero ranked sixth, and Rosemont ranked seventh.
  • Chicago soft drink tax: Retailers pay a 3% tax on their gross soft drink sales in Chicago, which is usually charged to the consumer when they purchase a soda or other drink containing less than 50% juice. Businesses that supply fountain drink syrup to retailers are also required to pay a 9% tax on their gross syrup sales.
  • Sugary sales tax: Consumers in Cook County now pay 1 cent per ounce on sugary beverages. That means a 12-cent tax on a 12-ounce bottle.