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
Do I need to file IL-1040-X if the IRS changes my income?
Yes. If the IRS adjusts your federal return and it affects Illinois tax, you must file IL-1040-X within 120 days of receiving the federal notice.
Are donations made through Schedule G-L tax-deductible?
Yes. Your Schedule G-L donations are eligible for a federal charitable deduction if you itemize on your federal Form 1040 Schedule A. Keep a copy of the filed schedule and any Lottery confirmation of your gift. The contribution will increase your Illinois payment or reduce your refund, but may lower your federal taxable income in the following year.
Changing jobs mid-year in IL
Update income/withholding and frequency; brackets are flat but credits/exemptions still matter.
Who must file Schedule FD?
You must file Schedule FD if you are a former Illinois resident who receives income (such as installment sale gains or deferred bonuses) sourced from Illinois that became taxable for federal purposes during 2026.
What documentation must accompany Schedule 1299-DA?
Attach copies of the other states’ filed tax returns, W-2s, or K-1s showing withholding and payments. Failure to attach proof can lead to denial of the credit. For convenience, you can track and upload copies directly through the MyTax Illinois portal.
Important Notes
All calculations are estimates for guidance only. Always review your return and consider professional advice when submitting official filings.