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Illinois Department of Revenue
Automatic Extension Payment
for Individuals Filing Form IL-1040
What is the purpose of Form IL-505-I?
months to file only if the Internal Revenue Service (IRS) grants you
an additional extension.
The purpose of Form IL-505-I, Automatic Extension Payment, is to
provide taxpayers who are unable to file their tax return by the due
When should I file and pay?
date a means of calculating and remitting their tentative tax liability
If you owe any tentative tax, and you pay with a paper check or
(including any other taxes you will report on your Form IL-1040) on or
money order, file Form IL-505-I along with your payment on or before
before the original due date of the return (see "When should I file and
the original due date of your annual return, or as soon as you realize
you owe tentative tax.
Who must file Form IL-505-I?
Where should I file?
You must file Form IL-505-I if all of the following apply to you:
Mail your Form IL-505-I to: Illinois Department of Revenue,
you cannot file your tax return by the due date, and
P.O. Box 19005, Springfield, Illinois 62794-9005. Make your check
you will owe a tentative tax (complete the Tax Payment Worksheet
or money order payable to “Illinois Department of Revenue.”
on the back of this page to determine this), and
Be sure to write your Social Security number, tax year, and
you submit your payment by paper check or money order (i.e.,
“IL-505-I” on your payment.
you do not use any electronic means, such as electronic funds
Will I owe penalties and interest?
transfer, to make your payment).
You will owe a
If Line 7 of the worksheet shows you owe tentative tax, you must
late-filing penalty if you do not file a processable return by the
pay the full amount due by the original due date of the return. An
extended due date,
extension of time to file does not extend the amount of time you
late-payment penalty if you do not pay the tax you owe by the
have to make your payment.
original due date of the return, and
Do not file Form IL-505-I if:
bad check penalty if your remittance is not honored by your
after you complete the Tax Payment Worksheet, you find that
you do not owe additional tax, or
You will owe interest on tax from the day after the original due date
you make your extension payment electronically by credit card,
of your return through the date you pay the tax. We will bill you for
electronic funds transfer (EFT), or bank account debit.
penalties and interest.
For more information about penalties and interest, see
If an unpaid liability is disclosed when you file your return,
Publication 103, Penalties and Interest for Illinois Taxes. To receive
you may owe penalty and interest charges in addition to the tax. See
a copy of this publication, see "What if I need additional forms or
“Will I owe penalties and interest?”
assistance?" on the back of this form.
What are the extensions?
What should I attach to my Form IL-1040?
Automatic Illinois six-month extension
If you file your return within the automatic six-month extension period,
We automatically grant you a six-month extension of time to file your
do not attach anything to your return to explain your delayed filing.
tax return. For calendar year filers, the filing date is automatically
If you file your return after the automatic six-month extension period
extended to October 15. You are not required to file Form IL-505-I to
and the IRS grants you an extension of more than six months, you
obtain this automatic extension. However, you must pay any tentative
must attach a copy of the document granting your federal extension
tax due by the original due date of your return in order to avoid any
to your tax return to avoid a late-filing penalty.
late-payment penalty and interest on unpaid tax.
Be sure to claim any Form IL-505-I payments on your 2016
Additional extension beyond six months
Form IL-1040, Line 27.
If you cannot file your tax return within the automatic six-month
extension period, we will grant you an extension of more than six
IL-505-I front (R-12/16)
Return only the bottom portion with your payment.
Illinois Department of Revenue
Automatic Extension Payment for Individuals
Enter your Social Security numbers in the order they appear on your federal return.
Do not file this form if no payment is due or you pay
electronically or by credit card.
Your Social Security number
Spouse’s Social Security number
For calendar year ending
12/16 or fiscal year ending
Month and year
Your first name & initial
Spouse’s first name & initial
Your last name
Tentative tax due (Whole dollars only)
Make your check or money order payable to and mail to:
ILLINOIS DEPARTMENT OF REVENUE
PO BOX 19005
Daytime phone number
SPRINGFIELD IL 62794–9005