Illinois Form IL-1040-V – Payment Voucher for Individual Income Tax (2026)
Last reviewed: 2025-11-07
Use the Illinois Tax Form Calculator Form IL-1040-V: Payment Voucher for Individual Income Tax as a stand alone tax form calculator to quickly calculate specific amounts for your 2026 Illinois state tax return. Alternatively, you can use one of our Combined Federal and State Tax Estimators to quickly calculate your salary, tax, and take-home pay.
Form IL-1040-V is the payment voucher used to submit any balance due on your Illinois individual income tax return (Form IL-1040). It accompanies checks or money orders mailed to the Illinois Department of Revenue. Taxpayers paying electronically do not need to submit this voucher.
When to Use Form IL-1040-V
Use Form IL-1040-V if:
- You file a paper Form IL-1040 and owe tax for 2026.
- You are making a payment separate from an electronic filing.
- Your Illinois return shows a balance due greater than $1,000.
Form IL-1040-V ensures your payment is properly applied to your account and matched with your return.
Completing the Voucher
- Enter your total Illinois income tax liability from your return (Line 1).
- Enter your total payments and withholding already made (Line 2).
- Subtract Line 2 from Line 1 to determine your balance due (Line 3).
- If Line 3 is greater than zero, this is the amount you must pay with your voucher.
Make your check or money order payable to “Illinois Department of Revenue.” Write your Social Security number and “2026 IL-1040” on your payment. Mail the completed voucher and payment to the address printed on the form or visit Illinois DOR Payment Options for electronic payment methods.
| 1 | Total Illinois tax liability | |
| 2 | Total payments and withholding | |
| 3 | Balance due (Line 1 − Line 2) | |
| 4 | Minimum threshold ($1,000) – payment required if Line 3 ≥ this amount |
Electronic Payment Options
Illinois strongly encourages taxpayers to pay electronically. You can pay online using:
- MyTax Illinois – the official online filing and payment portal.
- ACH debit or credit card (Visa, MasterCard, Discover, or American Express).
Payments made electronically before the filing deadline are considered timely even if the paper voucher is not mailed.
Example
Example: Your Illinois total tax for 2026 is $4,200, and you had $3,500 withheld during the year. The difference is $700. You include a check for $700 with your IL-1040-V and mail it by April 15, 2026.
Filing Deadline
Payments must be postmarked by the due date of your Illinois individual income tax return (usually April 15). If the due date falls on a weekend or holiday, the next business day applies. Late payments may incur interest and penalties under 35 ILCS 5/804.
Last reviewed: 2025-11-07: If you believe this form requires an update, please contact us.
Related Forms and Resources
- Form IL-1040 – Individual Income Tax Return
- Form IL-1040-ES – Estimated Income Tax Payments
- Form IL-2210 – Penalty Computation for Individuals
- Illinois DOR – IL-1040-V Form Information
Quick Access Tools
Frequently Asked Questions
Mortgage vs take-home planning
Try the Mortgage Calculator and revisit this IL page.
Where do I mail the completed IL-1040-V and payment?
Mail the completed voucher and payment to the address printed on the voucher (Illinois Department of Revenue, Springfield IL 62726-0001) unless told otherwise during filing.
Do charitable gifts affect IL tax?
IL doesn’t mirror federal itemized deductions; charitable gifts matter federally, not typically for IL base.
Why don’t my payroll brackets match?
Employer systems use rounding/timing and supplemental methods; small variances are normal.
Does Illinois tax Social Security or pension income?
No. Illinois exempts most retirement income—including Social Security, pensions, and IRA withdrawals—from state income tax. These subtractions are reported on Schedule M.
Important Notes
All calculations are estimates for guidance only. Always review your return and consider professional advice when submitting official filings.