Iowa Withholding Due Date Calendars

If the due date falls on a weekend, federal holiday, or legal holiday as defined in Iowa Code section 4.1(34), the due date is moved to the next bank working day following the weekend or legal holiday.

  • See the calendar below for the due dates for semimonthly deposits.

    Semimonthly filers are required to file quarterly returns. See quarterly calendar below for quarterly return due dates. Please note the 6th semimonthly deposit for the quarter is due before the return for that quarter must be filed.

    An ePayment (direct debit) must be made by 4pm CT on the due date to be considered timely.

    Period End Due Date Period End Due Date
    January 15 January 25 July 15 July 25
    January 31 February 10 July 31 August 10
    February 15 February 25 August 15 August 25
    February 29 March 10 August 31 September 10
    March 15 March 25 September 15 September 25
    March 31 April 10 September 30 October 10
    April 15 April 25 October 15 October 25
    April 30 May 10 October 31 November 10
    May 15 May 25 November 15 November 25
    May 31 June 10 November 30 December 10
    June 15 June 25 December 15 December 25
    June 30 July 10 December 31 January 10

     

  • Period End Due Date Period End Due Date
    January 31 February 15 July 31 August 15
    February 29 March 15 August 31 September 15
    March 31 April 30 September 30 October 31
    April 30 May 15 October 31 November 15
    May 31 June 15 November 30 December 15
    June 30 July 31 December 31 January 31

     

  • Period End Due Date Period End Due Date
    March 31 April 30 September 30 October 31
    June 30 July 31 December 31 January 31