Why do I have to pay interest when you're just now billing me?

Collections

Interest accrues on unpaid taxes from the due date of the tax return through the current date. The interest rate and how it is applied is set by law.

NOTE: If the unreported income was from wages (W-2), gambling income (W-2G) or miscellaneous income (1099misc) that had Iowa tax withheld, please send a copy of your W-2, W-2G, or 1099misc to us. We will give you credit for the Iowa withholding and revise the amount you owe.

Send copies attached to the billing notice in the return envelope provided to the Iowa Department of Revenue Central Collections.

If you need further assistance, contact our accounts receivable call center at 515-281-3114.