IOWA
WITHHOLDING DUE DATE CALENDARS
If
the due date falls on a weekend or federal holiday, the
due date is moved to the next bank working day following the weekend
or legal holiday.
WITHHOLDING SEMI-MONTHLY
Semi-monthly
filers are now required to file quarterly returns.
See quarterly calendar
below for quarterly return due dates.
|
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
|
|