Check Alaska tax deadlines for individuals and C Corporations. Confirm due dates, extension rules, and exemptions for S Corps and Partnerships.
Alaska imposes no individual income tax, but business filings are still required.
Alaska Tax Deadlines at a Glance (2026)
Entity Type | Return Due | Notes |
|---|---|---|
Individuals | N/A | No state income tax |
C Corporations | May 15, 2026 | 30 days after federal |
S Corporations | April 15, 2026 | Informational |
Partnerships | April 15, 2026 | Informational |
Businesses
Applies to corporations doing business or deriving income from Alaska.
Fiscal-Year Corporations
Due 30 days after federal corporate return, regardless of year-end.
Special Entities
Oil & gas companies
Financial institutions
Insurance companies
Estimated Payments
Required for corporations with expected tax liability.