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Hawaii imposes both income tax and general excise tax, creating layered compliance.
Hawaii Tax Deadlines at a Glance (2026)
Entity Type | Return Due | Extension Deadline |
|---|---|---|
Individuals | April 20, 2026 | October 20, 2026 |
C Corporations | April 20, 2026 | October 20, 2026 |
S Corporations | April 20, 2026 | October 20, 2026 |
Partnerships | April 20, 2026 | October 20, 2026 |
Individuals
Hawaii deadlines are later than federal. Hawaii pass-through entities (S corporations and partnerships) follow the 20th day of the 4th month rule, the same as individual and C-corporation returns, rather than the federal March pass-through date.
Businesses
General Excise Tax (GET) filings may be required monthly, quarterly, or annually.
Fiscal-Year Entities
Due dates follow months after year-end, adjusted for Hawaii-specific deadlines.