North Dakota sales tax due dates for 2026
Every date below comes from the state's published deadline rule (dataset 2026.07.0) and is already moved to the next business day when it lands on a weekend or federal holiday. Your account's assigned filing frequency decides which table applies.
Monthly North Dakota sales tax due dates
Rule: Last day of the month following the period.
| Period | Period ends | Return due |
|---|---|---|
| January 2026 | Jan 31, 2026 | Mar 2, 2026 (moved: 2026-02-28 falls on a Saturday) |
| February 2026 | Feb 28, 2026 | Mar 31, 2026 |
| March 2026 | Mar 31, 2026 | Apr 30, 2026 |
| April 2026 | Apr 30, 2026 | Jun 1, 2026 (moved: 2026-05-31 falls on a Sunday) |
| May 2026 | May 31, 2026 | Jun 30, 2026 |
| June 2026 | Jun 30, 2026 | Jul 31, 2026 |
| July 2026 | Jul 31, 2026 | Aug 31, 2026 |
| August 2026 | Aug 31, 2026 | Sep 30, 2026 |
| September 2026 | Sep 30, 2026 | Nov 2, 2026 (moved: 2026-10-31 falls on a Saturday) |
| October 2026 | Oct 31, 2026 | Nov 30, 2026 |
| November 2026 | Nov 30, 2026 | Dec 31, 2026 |
| December 2026 | Dec 31, 2026 | Feb 1, 2027 (moved: 2027-01-31 falls on a Sunday) |
Quarterly North Dakota sales tax due dates
Rule: Last day of the month following the period (Apr 30 / Jul 31 / Oct 31 / Jan 31).
| Period | Period ends | Return due |
|---|---|---|
| Q1 2026 | Mar 31, 2026 | Apr 30, 2026 |
| Q2 2026 | Jun 30, 2026 | Jul 31, 2026 |
| Q3 2026 | Sep 30, 2026 | Nov 2, 2026 (moved: 2026-10-31 falls on a Saturday) |
| Q4 2026 | Dec 31, 2026 | Feb 1, 2027 (moved: 2027-01-31 falls on a Sunday) |
Semi-annual North Dakota sales tax due dates
Rule: Last day of the month following the period (halves: due Jul 31 / Jan 31).
| Period | Period ends | Return due |
|---|---|---|
| January–June 2026 | Jun 30, 2026 | Jul 31, 2026 |
| July–December 2026 | Dec 31, 2026 | Feb 1, 2027 (moved: 2027-01-31 falls on a Sunday) |
Annual North Dakota sales tax due dates
Rule: January 31 following the calendar year.
| Period | Period ends | Return due |
|---|---|---|
| Calendar year 2026 | Dec 31, 2026 | Feb 1, 2027 (moved: 2027-01-31 falls on a Sunday) |
North Dakota filing notes
No additional state-specific filing notes are recorded for this cadence set.
Return and form
The principal repository-tracked return is ST. A paper channel exists, but the current form version and account eligibility still require confirmation.
Paper filing posture: accepted
Official North Dakota filing resources
- Due-date rule source — accessed July 2, 2026
- https://www.tax.nd.gov/
- https://www.tax.nd.gov/business/sales-and-use-tax
File North Dakota sales tax from reviewed data, not spreadsheets
Prophit.ai tracks every North Dakota due date above inside the return workspace, builds the period from your transaction data, and produces worksheet for portal entry and portal upload file that a reviewer approves before anything is submitted.
Need every state at once? Download the 2026 sales tax filing calendar (CSV + ICS, all states, weekend/holiday-adjusted).
Workflow support does not by itself establish registration, filing authority, credentials, agency acceptance, or tax advice. Confirm your assigned filing frequency with the state.
North Dakota sales tax filing questions
01When is North Dakota sales tax due?
Monthly North Dakota sales tax returns are due the last day of the month following the period. Quarterly returns are due the last day of the month following the period (Apr 30 / Jul 31 / Oct 31 / Jan 31). When a due date lands on a weekend or federal holiday it moves to the next business day; the 2026 calendar on this page already applies that adjustment.
02How often do you file sales tax in North Dakota?
North Dakota assigns a filing frequency to each account. The published cadences are monthly, quarterly, semi-annual and annual filing; the state assigns the frequency based on tax volume and notifies the account, so confirm the assigned basis before relying on a calendar.
03What form is used to file North Dakota sales tax?
The North Dakota return tracked here is ST. The principal repository-tracked return is ST. A paper channel exists, but the current form version and account eligibility still require confirmation.
04What happens if a North Dakota due date falls on a weekend or holiday?
The due date moves to the next business day. In 2026, 8 of the North Dakota due dates listed on this page are adjusted for a weekend or federal holiday; each adjusted date is marked in the calendar.
05Can North Dakota sales tax be filed on paper?
Paper filing posture tracked for North Dakota: accepted. The principal repository-tracked return is ST. A paper channel exists, but the current form version and account eligibility still require confirmation.
Reviewed and current as of August 22, 2026. Read the full North Dakota sales tax guide for rates, sourcing, products, exemptions, and marketplace rules.