State & Local Tax (SALT)
State Tax Deadlines
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North Dakota Tax Deadlines at a Glance (2026)
Entity Type | Return Due | Extension Deadline |
|---|---|---|
Individuals | April 15, 2026 | October 15, 2026 |
C Corporations | April 15, 2026 | October 15, 2026 |
S Corporations | March 16, 2026 | September 15, 2026 |
Partnerships | March 16, 2026 | September 15, 2026 |
Individuals
Applies to residents and nonresidents with North Dakota–source income. Extensions apply to filing only.
Businesses
North Dakota requires composite returns or nonresident withholding for pass-through entities.
Fiscal-Year Entities
Due dates are based on months after year-end, not the calendar year.
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