Your Illinois tax refund is not taxable income on your federal return, and Illinois does not tax it either
A refund of state income tax you already paid is not considered taxable income by the IRS or by Illinois. When you get money back because you overpaid your Illinois taxes during the year, that refund represents your own money being returned to you—not new income. The IRS has a specific rule: refunds of state and local income taxes are not taxable federal income.
The only exception is if you claimed the standard deduction on your federal return in the year you paid the Illinois tax. In that case, you cannot deduct the state tax you paid, so the refund is also not taxable. If you itemized deductions and deducted your Illinois state income tax, then the refund is still not taxable—the IRS treats refunds of state income tax as non-taxable in all cases.
Key Takeaways
- Illinois tax refunds are never taxable on your federal income tax return, regardless of whether you took the standard deduction or itemized.
- Illinois itself does not tax refunds of state income tax you receive.
- A refund is a return of money you already paid, not new income earned during the tax year.
- You do not need to report your Illinois tax refund on Form 1040 or any other federal tax form.
- If you received a refund larger than expected, the Illinois Department of Revenue can explain why by checking your account online.
How the IRS treats state tax refunds
The IRS published guidance on this in Publication 17, which covers the standard rules for filing federal taxes. State and local income tax refunds are explicitly excluded from taxable income. This applies to refunds from Illinois, as well as refunds from any other state.
The logic is straightforward: you paid Illinois income tax out of money you earned. When Illinois returns that money because you overpaid, you are not earning new income—you are recovering money that was already yours. The IRS does not tax the return of your own money.
You will not see a line on your federal tax return asking you to report your state refund. If you received an Illinois refund in the current tax year, you can simply ignore it for federal tax purposes.
Why Illinois does not tax its own refunds
Illinois has no tax on refunds of Illinois income tax. The state treats refunds the same way the federal government does: as a return of money you already paid, not as new income subject to tax.
If you file an Illinois state return and report your refund by mistake, the Illinois Department of Revenue will not penalize you, but you should correct it if you notice the error. The refund itself generates no state tax liability.
When you might receive an Illinois refund
You receive an Illinois refund when your employer withheld more tax from your paychecks than you actually owed for the year, or when you made estimated tax payments that exceeded your final tax bill. Illinois processes refunds throughout the year as returns are filed and processed.
The Illinois Department of Revenue typically issues refunds within 30 to 45 days of processing your return, though this can vary depending on the complexity of your return and current processing volume. If you filed electronically and chose direct deposit, the refund usually arrives faster than a paper check.
How to track your Illinois refund status
You can check the status of your Illinois refund through the Illinois Department of Revenue website. Go to the "Where's My Refund?" tool and enter your Social Security number and the refund amount shown on your return. The tool will tell you whether your refund has been processed, approved, or sent.
If you filed your return more than 45 days ago and the tool shows no status, contact the Illinois Department of Revenue directly at 217-782-3336. Have your Social Security number and the tax year in question ready. If your return was mailed rather than filed electronically, allow extra time for processing.
What to do if your refund seems wrong
If you received a refund that is larger or smaller than you expected, the Illinois Department of Revenue can explain the difference. Log into your account on the Illinois Department of Revenue website and review the calculation shown on your processed return. The return will show your total tax, total withholding, and the refund amount.
Common reasons for unexpected refunds include changes in withholding from a job change, additional income or deductions you reported, or credits you claimed. If you cannot find the reason, call the Illinois Department of Revenue at 217-782-3336 and ask them to walk you through the calculation.
Do not assume an unexpected refund is an error. The state may have found an overpayment you did not catch, or your withholding may have been higher than you realized. Verify the numbers before contacting the department.
Frequently Asked Questions
Do I have to report my Illinois refund on my federal tax return?
No. Illinois tax refunds are not reported anywhere on your federal return. You do not include them on Form 1040, Schedule A, or any other federal form. The IRS does not consider them taxable income.
What if I received an Illinois refund and also got a federal refund in the same year?
Both refunds are non-taxable. Your federal refund is not taxable, and your Illinois refund is not taxable. You report neither on any tax return. They are separate returns of money you overpaid to each government.
Can Illinois tax my refund if I move out of state?
No. Once you have paid Illinois income tax and received a refund, that refund is not subject to Illinois tax or to the tax of any other state. A refund is a return of money already paid, not new income.
What if I owe Illinois taxes from a previous year and receive a refund this year?
Illinois can offset your current refund against back taxes you owe. The state will not send you a refund check if you have an unpaid tax bill. Instead, the refund will be applied to what you owe. You will receive a notice explaining the offset.
Is my Illinois refund affected by the federal tax refund I received?
No. Your Illinois refund and your federal refund are calculated separately based on your state and federal tax returns. One does not affect the other. You may receive both refunds in the same tax year without any connection between them.