Iowa Sales Tax Due Dates — 2026
Exact Iowa sales tax filing deadlines for 2026 and 2027 — every period, already adjusted for weekends and holidays. Find your filing frequency, see the dates, and add them to your calendar.
Iowa Monthly Sales Tax Due Dates — 2026
| Filing period | Due date |
|---|---|
| December 2025 | Mon, February 2, 2026moved off weekend/holiday |
| January 2026 | Mon, March 2, 2026moved off weekend/holiday |
| February 2026 | Tue, March 31, 2026 |
| March 2026 | Thu, April 30, 2026 |
| April 2026 | Mon, June 1, 2026moved off weekend/holiday |
| May 2026 | Tue, June 30, 2026 |
| June 2026 | Fri, July 31, 2026 |
| July 2026 | Mon, August 31, 2026 |
| August 2026 | Wed, September 30, 2026 |
| September 2026 | Mon, November 2, 2026moved off weekend/holiday |
| October 2026 | Mon, November 30, 2026 |
| November 2026 | Thu, December 31, 2026 |
Dates are adjusted for weekends and U.S. federal holidays. Some states observe additional state holidays — always confirm the exact date with the Iowa Department of Revenue.
Iowa sales tax filing rules
Good to know
Iowa moved to a simplified deposit/return schedule; returns are due the last day of the month following the period.
Filing Iowa sales tax late
Iowa charges a late-filing and late-payment penalty plus interest on any unpaid tax, and most states apply a minimum penalty even on a zero return. File on time — even a return with no tax due must be filed. Confirm current penalty amounts with the Iowa Department of Revenue.
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Frequently Asked Questions
Official sources
Last verified 2026-05-30 against state revenue references. This page is for general information, not tax advice — confirm your specific due dates with the Iowa Department of Revenue.
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