Illinois Form IL-501, Payment Coupon, is a payment document issued by the Illinois Department of Revenue for businesses and employers that need to submit Illinois income tax withheld from employees or other payees. It is used to accompany a payment of withheld Illinois income tax when an employer qualifies to use a paper payment coupon. The form is intended for limited use and is not the standard payment method for most employers. Businesses that have recently started operating and have not yet received their Illinois tax registration information may use it temporarily. Employers who have ordered personalized payment coupons but have not received them may also use this form. The coupon collects the employer’s Federal Employer Identification Number (FEIN), sequence number, business name, mailing address, telephone number, applicable tax year, reporting quarter, and payment amount. It also identifies the months included in the selected quarter so the Illinois Department of Revenue can associate the payment with the correct withholding period. Employers must report payments made using Form IL-501 on Form IL-941, Illinois Withholding Income Tax Return, in Step 5, Line 4, for the corresponding quarter. The amount entered on the coupon must reflect the actual Illinois income tax withheld from employees or other payees. Illinois considers income tax withheld on the date the employer pays the employee or other recipient, making the payment date important when determining when the tax must be submitted. Most employers are encouraged to use electronic payment services, while employers assigned to a semi-weekly payment schedule are required to pay electronically. Completing Form IL-501 accurately helps ensure that payments are properly identified, credited to the correct tax account, and reported for the appropriate quarter.
Who Should Use Form IL-501?
Form IL-501 is intended for a limited group of Illinois employers who need to make withholding income tax payments but cannot yet use their regular personalized payment coupons.
You should generally use this coupon only if one of the following situations applies:
- New Business: Your business is newly registered and you have not yet received your Illinois tax registration information.
- Personalized Coupons Not Received: You have already ordered personalized Illinois withholding payment coupons but have not received them.
Most other employers should make their withholding payments electronically or use the personalized payment coupons provided by the Illinois Department of Revenue.
Employers Required to Pay Electronically
If the Illinois Department of Revenue has assigned your business to a semi-weekly payment schedule, you must make withholding tax payments electronically.
Employers assigned to a monthly payment schedule are also encouraged to use electronic payment methods.
Do not use Form IL-501 as a substitute for required electronic payments.
How To File Form IL-501
Form IL-501 is submitted with the payment of Illinois income tax withheld from employees or other payees. It is not a replacement for Form IL-941, Illinois Withholding Income Tax Return.
The payment coupon identifies the amount being submitted and the reporting period to which the payment belongs.
Where to Mail Form IL-501
If you are paying by check, mail the completed coupon and payment to:
Illinois Department of Revenue
PO Box 19447
Springfield, IL 62794-9447
Make your check payable to Illinois Department of Revenue.
Write your FEIN and the words “IL-501” on the check so the payment can be identified correctly.
Do not mail Form IL-501 if you make your payment electronically or if you are reporting a zero payment.
How to Make Electronic Payments
Illinois provides electronic payment options for employers who need to submit withholding income tax.
MyTax Illinois
MyTax Illinois is the state’s free online account management and tax payment service. Employers can use it to:
- File applicable tax returns.
- Make withholding tax payments.
- Monitor their Illinois tax accounts.
- Manage their tax-related information online.
Fed/State Employment Taxes (FSET) Program
The Fed/State Employment Taxes (FSET) Program is another electronic payment option. It is designed for large employers and payroll companies.
Employers can review the available electronic payment methods through the Illinois Department of Revenue’s online services.
Requesting Personalized Payment Coupons
If your business needs personalized payment coupons, contact the Illinois Department of Revenue’s Taxpayer Assistance Division.
You can request that personalized coupons be mailed to your business using either of these telephone numbers:
- 1-800-732-8866
- 217-782-3336
Once you receive your personalized coupons, use them for applicable future withholding payments instead of the temporary Form IL-501.
Information to Prepare Before Completing Form IL-501
Gather the following information before filling out the payment coupon:
- Employer’s Federal Employer Identification Number (FEIN).
- Sequence number, if assigned.
- Legal business name.
- Business mailing address.
- City, state, and ZIP code.
- Daytime telephone number.
- Tax year.
- Calendar quarter in which the withholding occurred.
- Total Illinois income tax withheld.
- Payment amount being submitted.
You should also review your payroll records to determine the exact amount of Illinois income tax withheld during the applicable reporting period.
When Are Illinois Withholding Tax Payments Due?
The payment deadline depends on the payment schedule assigned to your business by the Illinois Department of Revenue.
Monthly Payment Schedule
Most employers who use paper payment coupons are classified as monthly payers.
Monthly payers must submit their Illinois withholding tax payments by the 15th day of each month for taxes withheld during the preceding month.
For example, Illinois income tax withheld from employees during January must generally be paid by February 15.
Employers may choose to pay more frequently through electronic payment methods or preprinted personalized payment coupons.
However, do not use Form IL-941 to make more frequent withholding tax payments. The return is used for reporting the withholding tax rather than making additional interim payments.
Semi-Weekly Payment Schedule
Employers assigned to a semi-weekly payment schedule must make their payments electronically.
These employers cannot use Form IL-501 to submit paper payments.
Follow the electronic payment requirements and deadlines applicable to your assigned schedule.
Important: When Is Income Tax Considered Withheld?
Illinois considers income tax withheld on the date an employer pays an employee or another payee.
This date determines when the withholding tax payment becomes due.
For example, if an employer pays an employee on January 31, the Illinois income tax withheld from that payment is considered withheld on January 31.
Use the actual payment dates when determining your withholding obligations.
Do not estimate the amount of withholding tax.
How Much Should You Pay?
The amount entered on Form IL-501 must equal the Illinois income tax actually withheld from employees or other payees.
Your payment amount depends on the withholding amounts calculated from payroll and other applicable payments.
Use the 2026 Booklet IL-700-T, Illinois Withholding Tax Tables, to determine the correct withholding amounts.
Do not enter an estimated payment based on expected payroll or anticipated withholding.
How To Complete Form IL-501
The 2026 Illinois Form IL-501 contains a payment coupon with employer identification fields, a tax year field, a reporting quarter selection, and a payment amount section.
Complete each field carefully to ensure the payment is credited to the correct withholding tax account and reporting period.
Tax Year and Reporting Quarter
Tax Year
Enter the tax year for which the withholding payment is being submitted.
The 2026 coupon is intended for withholding tax payments associated with the 2026 tax year.
Make sure the year agrees with the payroll records and reporting period covered by the payment.
Reporting Quarter: January Through March
Select Quarter 1 if the payment relates to Illinois income tax withheld during January, February, or March.
The three months included in this quarter are:
- January.
- February.
- March.
Check only the first-quarter box when reporting withholding for these months.
Reporting Quarter: April Through June
Select Quarter 2 if the payment relates to Illinois income tax withheld during April, May, or June.
The months included are:
- April.
- May.
- June.
Select this quarter when the payment relates to withholding during this period.
Reporting Quarter: July Through September
Select Quarter 3 if the payment relates to Illinois income tax withheld during July, August, or September.
The months included are:
- July.
- August.
- September.
Choose this quarter for payments associated with withholding during these months.
Reporting Quarter: October Through December
Select Quarter 4 if the payment relates to Illinois income tax withheld during October, November, or December.
The months included are:
- October.
- November.
- December.
Choose this quarter when reporting withholding for the final three months of the calendar year.
Quarter Selection Instructions
Select only one quarter on the payment coupon.
Choose the quarter that includes the month when the Illinois income tax was withheld.
For example, if you withheld Illinois income tax from employee wages paid in August 2026, select Quarter 3.
Remember that every Form IL-501 payment must also be reported on Form IL-941, Step 5, Line 4, for the corresponding quarter.
Employer Identification Information
Federal Employer Identification Number (FEIN)
Enter the business’s complete Federal Employer Identification Number.
This is the nine-digit identification number assigned to the employer by the Internal Revenue Service.
Enter the FEIN in the designated boxes and verify that every digit is correct.
The FEIN helps the Illinois Department of Revenue identify the employer’s withholding tax account and properly apply the payment.
Sequence Number
Enter the sequence number associated with the employer’s Illinois withholding tax account, if one has been assigned.
Use the sequence number provided by the Illinois Department of Revenue or shown in the employer’s account information.
Do not invent a sequence number if one has not been provided.
Business Information
Business Name
Enter the complete legal name of the business or employer making the withholding tax payment.
Use the name associated with the employer’s Illinois tax registration.
Make sure the business name corresponds to the FEIN entered above.
Number and Street Address
Enter the employer’s complete mailing street address.
Include the building number and street name.
If the business uses a mailing address different from its physical location, use the address associated with its Illinois withholding tax account.
City
Enter the city where the business receives its official tax correspondence.
State
Enter the two-letter postal abbreviation for the state associated with the business mailing address.
For example, enter IL for Illinois.
ZIP Code
Enter the ZIP code associated with the business address.
Check the ZIP code carefully to avoid mailing or account identification problems.
Daytime Telephone Number
Enter a daytime telephone number where the Illinois Department of Revenue can contact the employer or its representative.
Include the area code.
Use a working telephone number so the department can reach the business if questions arise about the payment.
Payment Information
Amount Paid
Enter the total amount of Illinois income tax being submitted with the payment coupon.
The amount should reflect the actual withholding tax collected from employees or other payees for the applicable payment period.
Do not include estimated withholding amounts.
Use your payroll records and the applicable Illinois withholding tax tables to verify the payment amount.
Enter the amount in dollars and cents in the designated space.
Check Payment Instructions
If paying by check, follow these requirements:
- Make the check payable to Illinois Department of Revenue.
- Write the employer’s FEIN on the check.
- Write IL-501 on the check.
- Make sure the check amount matches the Amount Paid field.
- Mail the check with the completed payment coupon.
Mailing Address for Payment
Send the completed payment coupon and check to:
Illinois Department of Revenue
PO Box 19447
Springfield, IL 62794-9447
Do not mail the coupon if you have already paid electronically or if the payment amount is zero.
Reporting Form IL-501 Payments on Form IL-941
Using Form IL-501 does not eliminate the requirement to report the withholding payment on Form IL-941.
Employers must report all payments made using Form IL-501 on Form IL-941, Illinois Withholding Income Tax Return.
Form IL-941, Step 5, Line 4
Enter the total Form IL-501 payments made for the corresponding quarter on Step 5, Line 4, of Form IL-941.
Make sure the amount reported agrees with the payment records for that quarter.
For example, if you made multiple IL-501 payments during the first quarter, include the applicable payments when completing the corresponding quarterly return.
Keep your payment records so you can verify that the amounts reported on Form IL-941 agree with the amounts actually submitted.
Important Rules to Remember When Using Form IL-501
Before making your withholding tax payment, review these important requirements.
Form IL-501 Is for Limited Use Only
Most employers should make withholding payments electronically or use personalized payment coupons issued by the Illinois Department of Revenue.
Use the temporary coupon only if your business is new and has not received its registration information or if ordered personalized coupons have not yet arrived.
Semi-Weekly Employers Must Pay Electronically
If your business has been assigned a semi-weekly payment schedule, electronic payments are mandatory.
Do not use the paper IL-501 coupon for these payments.
Monthly Payments Are Generally Due by the 15th
Most monthly payers must pay by the 15th day of the month following the month in which the tax was withheld.
Follow the payment schedule assigned to your business.
Do Not Submit a Zero-Payment Coupon
If no Illinois income tax was withheld, do not make a payment or submit Form IL-501.
Do Not Estimate Withholding Tax
Use actual payroll and payment records to determine the withholding amount. Illinois considers the tax withheld on the date employees or other payees are paid.
Report All Payments on Form IL-941
Every payment made using Form IL-501 must be reported on Form IL-941, Step 5, Line 4, for the applicable quarter.
Do Not Use Form IL-941 for More Frequent Payments
Form IL-941 is the withholding income tax return. Do not use it to make more frequent payments instead of the designated payment methods.
What If You Need Additional Assistance?
If you need help completing Form IL-501, understanding payment requirements, or requesting personalized payment coupons, contact the Illinois Department of Revenue.
Website
Visit the Illinois Department of Revenue website for tax information, online services, and payment guidance.
Taxpayer Assistance Division
Telephone: 1-800-732-8866
Alternative telephone: 217-782-3336
TTY Assistance
Telephone: 1-800-544-5304
These contact options can help employers obtain information about Illinois withholding tax payments and account requirements.
Final Review Before Filing
Before mailing Form IL-501 or submitting your withholding tax payment, review the following checklist to ensure that the coupon is completed correctly.
Payment Eligibility
- The business qualifies to use the limited-purpose IL-501 payment coupon.
- The business is new and has not yet received its registration information, or personalized payment coupons have been ordered but not received.
- The business is not required to make the payment electronically under a semi-weekly schedule.
- Illinois income tax was actually withheld from employees or other payees.
- The payment is not a zero-amount payment.
Tax Year and Reporting Period
- The correct tax year is entered.
- The correct reporting quarter is selected.
- Only one quarter is checked.
- The selected quarter includes the month when the income tax was withheld.
- The payment is associated with the correct withholding period.
Employer Information
- The complete FEIN is entered correctly.
- The sequence number is provided when applicable.
- The business’s legal name is correct.
- The street address is complete.
- The city is entered correctly.
- The state abbreviation is accurate.
- The ZIP code is correct.
- The daytime telephone number is provided.
Payment Details
- The payment amount reflects actual Illinois income tax withheld.
- The amount has been checked against payroll records.
- The withholding tax tables have been used when calculating the applicable withholding.
- The amount paid is entered correctly in dollars and cents.
- The check is payable to Illinois Department of Revenue.
- The employer’s FEIN is written on the check.
- IL-501 is written on the check.
- The check amount agrees with the Amount Paid field.
Final Submission and Reporting
- The completed coupon and check are addressed to the correct Illinois Department of Revenue payment address.
- The coupon is not being mailed if the payment was made electronically.
- The coupon is not being mailed for a zero payment.
- All IL-501 payments will be reported on Form IL-941, Step 5, Line 4, for the corresponding quarter.
- The employer has retained payment records for future reference.
- The applicable payment deadline has been reviewed.
Form IL-501 is a temporary and limited-use payment coupon for employers submitting Illinois income tax withheld from employees or other payees. By entering the correct employer identification information, selecting the appropriate reporting quarter, and paying the actual withholding amount, employers can help ensure that their payments are credited correctly. Remember to report every IL-501 payment on the corresponding quarterly Form IL-941 and use electronic payment methods whenever required by the Illinois Department of Revenue.