Illinois State Taxes
Quick Tax Facts
Income Tax: 4.95%
State Sales Tax: 6.25%
Median Property Tax: $5,055
Overview
Illinois may seem like a great place to live with its flat income tax rate, but it’s actually considered the least tax-friendly for middle-class families and retirees. Residents pay some of the highest combined state and local tax rates in America. On top of high gas taxes, the state also levies the second-highest property taxes in the nation.
Illinois Income Tax
Illinois is one of a handful of states that has a flat income tax rate. The current rate is 4.95%, but there are rumblings that the legislation may attempt to change it to a graduated income tax rate moving forward. Governor J.B. Pritzker tried to do just that in 2020, leaving it up to voters to pass a constitutional amendment, but it failed to pass.
Who Must File?
If you are an Illinois resident, you must file an income tax return (Form IL-1040) if you are required to file a federal income tax return, or you are not required to file a federal return but your Illinois base income from Line 9 is greater than your Illinois exemption allowance.
Due to reciprocal agreements, residents who worked in Iowa, Kentucky, Michigan, or Wisconsin must also file and include any income earned in these states.
Part-Year & Non-Residents
Part-year residents must file a return and Schedule NR if any of the following are true:
- You earned income from any source while residing in Illinois,
- While living outside of the state, you earned income from an Illinois source, or
- You want a refund of any Illinois income tax withheld.
Non-residents must also file Schedule NR if they earned enough income through Illinois sources to have a tax liability.
Illinois Sales Tax
Illinois has two rate structures for its sales and use tax. General merchandise is taxed at 6.25% and 1% is levied on foods, drugs, and medical appliances. The sales tax rate may be different in various locations because local jurisdictions are allowed to impose their own sales taxes, too. Local rates are subject to change on January 1 and July 1 of each year.
The average combined sales tax rate (local, county, and state) in Illinois is 8.82%. Several cities have combined sales tax rates of 10.00% or higher.
Illinois Property Taxes
Illinois levies property taxes at the county level. All counties, excluding Cook, assess a property’s value every four years. In Cook County, it is done every three years. This can be problematic in years when the real estate market declines because residents will be taxed on outdated, higher property values.
The median property tax in Illinois is $5,055 annually. Lake County has the highest property tax at an average of $8,609. The lowest amount is $694 in Pulaski County.
| Highest | $8609 |
|---|---|
| Median | $5055 |
| Lowest | $694 |
Yearly Cost Per Resident
Illinois Tax Holidays
There are no tax holidays scheduled in Illinois at this time.
Illinois Tax Relief
Unresolved Illinois tax obligations can become more challenging over time as penalties and interest increase the amount you owe. The Illinois Department of Revenue (IDOR) may also begin collection efforts when a balance remains unpaid. Whether you’re dealing with unfiled returns, a financial setback, or outstanding business taxes, addressing the issue promptly may give you more opportunities to resolve your account before collections escalate.
If paying your Illinois tax balance in full isn’t possible, you may have options for managing what you owe. Depending on your circumstances and eligibility, you may be able to set up a payment plan or pursue an Offer in Compromise. Working toward a resolution sooner may also help you avoid or address collection actions such as tax liens, wage garnishments, and bank levies.
Understanding how Illinois handles past-due taxes and the relief options available can help you determine the best way forward. Taking proactive steps to resolve your balance can help you bring your tax account into compliance and move beyond your Illinois tax issues.
Common Illinois State Tax Problems
Back Taxes
If you owe unpaid Illinois taxes, addressing your balance early may help you avoid additional penalties and collection actions.
Unfiled Tax Returns
Filing past-due Illinois tax returns is often the first step toward resolving your state tax issues.
Tax Notices
Notices from the IL Department of Revenue shouldn’t be ignored, as they often require prompt action to prevent further collections.
Liens & Levies
Unresolved tax debt may lead to liens against your property or levies on your assets as the state works to collect what is owed.
Garnishment
Illinois may garnish your wages to collect unpaid taxes, reducing the amount of each paycheck you receive.
Tax Penalties
Unpaid taxes can continue to accrue penalties and interest until your balance is resolved.
How Illinois Collects Tax Debt
If you do not pay your Illinois income tax in full when due, the state will send you a bill (Notice of Tax Due) detailing your outstanding balance, penalties, and interest.
Failure to pay your overdue income taxes by the due date in the demand for payment will result in an escalation of collection actions. The state may place a lien on your property (enforceable for up to 20 years), garnish your wages, or seize (levy) assets.
Penalties and interest will continue to accrue until your balance is paid in full. Addressing your tax debt as early as possible can help you avoid additional costs and more serious collection actions.
Notice of Tax Due sent to taxpayer
State tax lien filed
Refer account to collections
Illinois State Tax Relief Options
IIllinois offers a few relief options, including:
- Payment Plans – Taxpayers can apply to a payment installment plan if they cannot pay their tax bill in full when due.
- Offer in Compromise – Illinois may consider an Offer in Compromise if paying your tax debt will create a financial hardship. The application is processed by the Board of Appeals and typically takes 12 to 15 months to complete.
If you’re experiencing financial hardship and can’t pay your Illinois income tax bill, contact Taxpayer Assistance as soon as possible to avoid collection actions.
When to Seek Tax Relief Help
If you’re experiencing any of the following, it may be time to explore your tax relief options:

You’re Receiving Collection Notices
Ignoring Illinois tax notices can lead to more serious collection actions, so it’s often best to address the issue early.

You Can’t Afford to Pay Your Taxes
If paying your Illinois state tax bill in full isn’t realistic, there may be payment or resolution options available.

Collection Actions Have Started
If you’re facing wage garnishments, bank levies, or tax liens, professional guidance may help you understand your options.
The sooner you address your tax debt, the more options you may have available to resolve your balance and minimize additional collection actions.
Illinois Tax Relief FAQs
Illinois Tax Resources
If you need assistance preparing your Illinois state taxes, you can speak with a tax professional from Tax Defense Network by calling 855-476-6920.
You can also visit the Illinois Department of Revenue website for additional resources.
- Make a Payment
- Where’s My Refund?
- Download Tax Forms
- File a Return
- Taxpayer Assistance: 800-732-8866 or 217-782-3336


