Maine Sales Tax Due Dates — 2026
Exact Maine 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.
Maine Monthly Sales Tax Due Dates — 2026
| Filing period | Due date |
|---|---|
| December 2025 | Thu, January 15, 2026 |
| January 2026 | Tue, February 17, 2026moved off weekend/holiday |
| February 2026 | Mon, March 16, 2026moved off weekend/holiday |
| March 2026 | Wed, April 15, 2026 |
| April 2026 | Fri, May 15, 2026 |
| May 2026 | Mon, June 15, 2026 |
| June 2026 | Wed, July 15, 2026 |
| July 2026 | Mon, August 17, 2026moved off weekend/holiday |
| August 2026 | Tue, September 15, 2026 |
| September 2026 | Thu, October 15, 2026 |
| October 2026 | Mon, November 16, 2026moved off weekend/holiday |
| November 2026 | Tue, December 15, 2026 |
Dates are adjusted for weekends and U.S. federal holidays. Some states observe additional state holidays — always confirm the exact date with the Maine Revenue Services.
Maine sales tax filing rules
Good to know
Maine returns are due the 15th of the month following the reporting period — earlier than most states.
Filing Maine sales tax late
Maine 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 Maine Revenue Services.
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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 Maine Revenue Services.
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