Filing Frequency & Return Due Dates

Annually

• Less than $1,200 in sales and use tax a year
• File one return for the calendar year
• Return and payment due on or before January 31 following each calendar year
• Return may be filed electronically through GovConnectIowa or by paper

Monthly

• $1,200 or more in sales and use tax per year
• Return must be filed and tax must be paid electronically through GovConnectIowa
• Due on or before the last day of the following month

Seasonal

• $1,200 or more in sales and use tax in four or less months per year
• Can be nonconsecutive months, i.e. January, June, July, December
• Return must be filed and tax must be paid electronically through GovConnectIowa
• Due on or before the last day of the following month

NOTE: If you are currently registered as a monthly or annual filer and wish to become a seasonal filer, you must cancel your current permit and register for a new permit. You cannot switch to seasonal status through the Business Change Form.

Quarterly

• Less than $6,000 tax per year (less than $1,500 per quarter; less than $500 per month)
• File a quarterly return for each calendar quarter
• Return and payment due on or before the last day of the month following each calendar quarter

Monthly

• $6,000 - $120,000 tax per year ($500 - $10,000 per month)
• File tax deposits for the first two months of each calendar quarter
• Due on or before the 15th of the following month
• No monthly deposit for the third month of the quarter
• For the third month, file the quarterly return with the payment for the balance of tax due for that quarter
• Due on or before the last day of the month following each calendar quarter

Semimonthly

• More than $120,000 tax per year (more than $10,000 per month; more than $5,000 semimonthly)
• Required to file deposits twice each month electronically
• 1st deposit - for the period from the 1st through the 15th; due on or before the 25th of that month
• 2nd deposit - 16th through the end of the month; due on or before the 10th day of the following month
• Must make a total of 6 semimonthly deposits each quarter
• The 6th payment is due on or before the 10th day of the month following the end of the quarter
• All six payments should be made before filing the withholding quarterly return
• Required to file quarterly return electronically
• Due no later than the last day of the month following the end of the quarter
• If the six deposits were made correctly, no balance due with the quarterly return
• May make an additional payment with the quarterly return, if needed

W-2s, W-2Gs, and 1099s

• Beginning in 2020 for tax year 2019 and all subsequent tax years, businesses that issued W-2s or 1099s that contain Iowa withholding must electronically file those documents by February 15. If businesses did not withhold any Iowa taxes, filing is not required.