Where's my refund Illinois: checking your IL-1040 refund and what each status means
Short answer
Where's my refund Illinois: use the Where's My Refund? tool on MyTax Illinois, which shows the current year's IL-1040 refund and updates each business day. The Illinois Department of Revenue (IDOR) says refunds from e-filed returns can be expected around 4 weeks after filing, while paper returns may take more than 8 weeks. Once IDOR approves a refund, the Illinois Comptroller issues the payment.
- 01Where to check
- Where's My Refund? on MyTax Illinois (current year only)
- 02E-filed return
- Around 4 weeks after filing
- 03Paper return
- May take more than 8 weeks
- 04Who pays the refund
- Illinois Comptroller, after IDOR approves it
- 05After release
- Direct deposit up to 2 business days; check up to 10 business days
- 06Interest
- Paid if not refunded within 90 days after the return due date
Where's my refund Illinois: where do you check?
The Illinois Department of Revenue (IDOR) tracks state refunds with Where's My Refund?, an application on MyTax Illinois. It shows whether IDOR has received your Illinois individual income tax return, whether the return is processing or finished, and the time frame for a direct deposit or a mailed check. It also tells you if the return produced no refund or if IDOR sent a notice about a change.
The tool covers only the current year's refund. For a prior-year or amended return refund, IDOR says to call its taxpayer assistance line instead. After IDOR finishes processing, the Illinois Comptroller's Find Your Illinois Tax Refund System gives more detail on the payment itself.
Where's My Refund? updates once each business day, so a change shows the next business day. Checking several times a day will not show anything new, and the federal Where's My Refund tool never shows Illinois refunds.
How long does an Illinois tax refund take?
IDOR says refunds from e-filed returns can be expected around 4 weeks after filing, and refunds from paper returns may take more than 8 weeks. It states there is no advantage to filing a paper Form IL-1040. Some refunds take longer because of filing errors or the security review IDOR uses to stop identity theft and fraud.
| Step | Time IDOR gives | Counted from |
|---|---|---|
| E-filed return refunded | Around 4 weeks | Filing |
| Paper return refunded | May take more than 8 weeks | Filing |
| Comptroller sends the payment details | Usually 24 to 48 hours | IDOR approves the refund |
| Direct deposit reaches your account | Up to 2 business days | Refund released |
| Paper check arrives by mail | Up to 10 business days | Refund released |
| Notice explaining a changed refund | Within 7 to 10 business days | Refund amount changed |
In the 2026 season IDOR began accepting returns on January 26, 2026, the same day the IRS opened, with an April 15, 2026 deadline. In the 2025 season it received over 6.3 million individual returns, about 91.3% of them filed electronically. IDOR has not yet announced the 2027 start date.
Avoid the most common Illinois delays
What does date not determined mean on Illinois Where's My Refund?
It means IDOR has approved your refund and sent it to the Comptroller, but the Comptroller has not yet sent back the payment details. Until it does, IDOR cannot show a date. IDOR says this usually takes 24 to 48 hours, after which the tool updates with more detail.
IDOR can give only a projected time frame, never an exact date, and it says the same about any date a preparer or software estimates. It also warns against counting on a refund by a certain date for a major purchase or bill.
Why did my Illinois refund come as a check or a different amount?
IDOR lists four reasons a requested direct deposit becomes a paper check:
- IDOR could not verify the bank account information on the return.
- It is the first year you filed a Form IL-1040.
- Your bank did not honor the direct deposit.
- Your bank is located outside the United States.
If the amount changed, IDOR mails a notice within 7 to 10 business days that explains the difference and how to disagree. IDOR no longer offers a debit card refund option. For how debts can also take a federal refund, see our tax refund offset guide.
How do you answer an Illinois identity verification letter?
IDOR sends an identity verification letter when a return filed with your SSN or ITIN needs proof that you are the person who filed it. You can respond on MyTax Illinois without creating an account, by taking a quiz, entering a code or attaching documents, depending on what the letter asks.
If you miss the due date on the letter, IDOR asks for two documents within 60 days of the letter date: one showing your photo and full name, and one showing your full name and the address used on the return.
| Category 1: photo and full name | Category 2: full name and return address |
|---|---|
| Illinois driver's license, current or expired less than one year | Utility bill |
| State ID card, or a current driver's license from another state | Bank or credit card statement |
| Passport or military ID | Payroll stub or W-2 |
| School photo ID, or employer photo ID with a recent pay stub | Property tax bill, signed rental agreement or insurance policy |
Uploading on MyTax Illinois with the Letter ID is quicker, IDOR says. Without a Letter ID you must mail copies, never originals, with the letter or Form IL-425 to IDOR's Anti-Fraud Unit. If you did not file the return, report it as identity theft on MyTax Illinois. Our IRS refund identity verification guide covers the federal letters.
When should you contact IDOR or the Comptroller?
Calling IDOR will not speed up processing. IDOR says it processes more than 6 million individual returns a year and that its phone specialists are not the staff who process them. Contact IDOR when Where's My Refund? shows a notice you need to answer, or for a prior-year or amended refund.
Replacement checks go through the Illinois Comptroller's Office, including a lost check, a check that never arrived and an uncashed prior-year check over one year old. IDOR's answer center says to contact the Comptroller once more than 10 days have passed since a check was mailed.
For other states, see the state tax refund status overview, or compare Ohio refund status and Missouri refund status.
Common questions
How do I check my Illinois state refund status?
Use Where's My Refund? on MyTax Illinois for the current year's IL-1040 refund. For a prior-year or amended refund, IDOR says to call its taxpayer assistance line.
How long does an Illinois refund take in 2027?
IDOR has not announced anything specific to 2027. Its standing guidance is around 4 weeks after filing for e-filed returns and possibly more than 8 weeks for paper returns.
Why does Illinois Where's My Refund say date not determined?
Your refund was approved and passed to the Comptroller, who has not yet returned the payment details. IDOR says this usually takes 24 to 48 hours.
Why did Illinois send a paper check instead of direct deposit?
IDOR could not verify the account, it was your first IL-1040, your bank refused the deposit, or the bank is outside the United States.
Does Illinois pay interest on late refunds?
Yes, if the overpayment is not refunded within 90 days after the return due date. Interest runs from the latest of the due date, the date a processable return was filed or the overpayment date.
Sources
- Illinois Department of Revenue, Where's My Refund? tax.illinois.gov
- Illinois Department of Revenue, How do I check the status of my individual income tax refund? tax.illinois.gov
- Illinois Department of Revenue, Identity Verification Letters Information tax.illinois.gov
- Illinois Department of Revenue announces Jan. 26 start to 2026 income tax season (January 20, 2026) illinois.gov
We check figures against these official pages. Rules change; confirm anything that affects a deadline or payment with the agency before you act.
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