Illinois refunds pass through two offices: the Department of Revenue approves them and the Comptroller pays them. That is why one tool may say a date is not yet determined while another has the answer.
This guide gives the department's timelines for e-filed and paper returns, explains each step of Where's My Refund? and the Comptroller's system, and lists the reasons a refund arrives as a check or is reduced, using the department's own pages.
| Filing method | Expected wait (Illinois DOR) |
|---|---|
| E-filed return | Around four weeks after filing |
| Paper return | More than eight weeks after filing |
| After release: direct deposit | Up to two business days to be deposited |
| After release: paper check | Up to 10 business days to arrive by mail |
The department says there is no advantage to filing a paper Form IL-1040, and that filing electronically with direct deposit is the fastest way to get your refund and helps prevent filing errors such as incorrect math. Some refunds take longer because of the department's identity-theft and fraud review process or errors in filing. It also says not to rely on receiving a refund by a certain date for major purchases or other obligations.
Where's My Refund? tells you whether the department has initiated the refund process for your current-year refund: whether it has received your return, whether it is being processed or finished, the time frame in which you should expect payment, whether your return produced a refund, and whether a notice was sent about a change to your refund. It updates each business day and only covers the current year. Once an expected time frame is given, the department points you to the Illinois Comptroller's Find Your Illinois Tax Refund System for more detail. If the tool says a date has not been determined, the department is waiting for the Comptroller to return payment details, which usually takes 24 to 48 hours. The department cannot give an exact date, and calling Taxpayer Assistance will not speed up processing.
| Situation | What Illinois says |
|---|---|
| Refund differs from your return | You receive a notice within 7 to 10 business days explaining the difference |
| First year filing Form IL-1040 | The refund is issued as a paper check |
| Bank account could not be verified | Paper check |
| Financial institution did not honor the deposit, or is outside the United States | Paper check |
| Debts owed | The overpayment is reduced by outstanding tax, penalties and interest and by certified debts to other agencies or governments |
| Refund under $1 | Not refunded |
On the 2025 Form IL-1040 you choose a refund method on line 39 and must check one box for direct deposit or paper check when you request a refund on line 38. A lost check or an uncashed check over one year old is replaced by the Comptroller's Office at 1-800-877-8078.
Check Where's My Refund? once a business day at most, since that is how often it updates; use the Comptroller's system after an expected time frame is shown. See our Illinois tax guide and Illinois income tax guide for rates, our filing deadline guide for dates and our amended return guide if you need to correct a federal return that affects your Illinois one.
Illinois Department of Revenue: Where's My Refund?, Illinois Department of Revenue: 2025 Form IL-1040 Instructions.
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