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.

Withholding Semi-Monthly (electronic payment required)

See the calendar below for the due dates for semi-monthly deposits.

Semi-monthly filers are required to file quarterly returns. See quarterly calendar below for quarterly return due dates. Please note the 6th semi-monthly 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

 

Withholding Monthly

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

 

Withholding Quarterly

PERIOD END DUE DATE PERIOD END DUE DATE
March 31 April 30 September 30 October 31
June 30 July 31 December 31 January 31