State of Iowa Business Income Tax Extensions

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General Instructions

Iowa business tax returns are due by the last day of the 4th month following the close of the tax year. For calendar year taxpayers, this date is April 30. If you cannot file on time, you can get a state tax extension.

Iowa business extensions are automatic, which means there is no application to submit. As long as you’ve paid at least 90% of your state tax liability by the original deadline (April 30), you will automatically receive a 6-month Iowa tax extension. If you owe zero Iowa tax, you will be granted an automatic extension without having to do anything.

Extension payments can be made using Form IA 1120V (Corporation Tax Payment Voucher). Or you can make a state tax payment online via Iowa’s “eFile & Pay” system:

For more information, please visit the Iowa Department of Revenue website:

Iowa State Income Tax Extension Forms


Form IA 1120V (Corporation Income Tax Payment Voucher)

Mail with payment to the following address:

Corporation Tax Return Processing - Voucher

Iowa Department of Revenue

PO Box 10466

Des Moines, Iowa  50306-0466