If the due date falls on a Saturday, Sunday, or holiday as defined in Iowa code 421.9A, then the due date is the following day that is not a Saturday, Sunday, or holiday.
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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.
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