2027 Hawaii Tax Deadlines
Hawaii Individual income tax filing deadlines and extensions for 2027
Hawaii tax deadlines are easier to manage when the filing calendar, payment rules, and extension rules sit in one place. Tax year 2027 returns are generally filed in 2028, while estimated payments run through 2027. Use the key dates below as the single source for Hawaii due dates, then apply the rules by entity type.
These dates apply to calendar-year filers. Fiscal-year filers follow different due dates tied to their fiscal year and should confirm the applicable Hawaii deadline before filing or paying.
Last updated: July 29, 2026
Key Hawaii tax dates at a glance
This block is the single date reference for 2027 Hawaii filing, payment, and extension planning.
- April 20, 2027: First Individual estimated payment.
- June 21, 2027: Second Individual estimated payment, because June 20 falls on a Sunday.
- September 20, 2027: Third Individual estimated payment.
- January 20, 2028: Fourth Individual estimated payment.
- April 20, 2028: C Corporation, S Corporation, Partnership, and Individual returns and payments.
- October 20, 2028: Extended C Corporation, S Corporation, Partnership, and Individual returns (file only).
When are Hawaii taxes due in 2027?
Hawaii's 2027 calendar-year income tax returns for Individuals, C Corporations, S Corporations, and Partnerships are generally due April 20, 2028. Estimated payments follow Hawaii's 20th-day calendar, and extended returns are generally due in October 2028.
When is the Hawaii C Corporation return due?
Hawaii C Corporations file Form N-30 and pay Hawaii corporate income tax by April 20, 2028.
- Complete Form N-30, Corporation Income Tax Return.
- File through approved software and use Hawaii Tax Online for supported accounts and payment services.
- Pay the balance due by April 20, 2028.
- Retain the submission confirmation and payment record with the return workpapers.
What are Hawaii C Corporation extension rules?
The extended filing deadline for a calendar-year Hawaii C Corporation return is October 20, 2028. The extension is to file only, so the balance remains due April 20, 2028.
When are Hawaii S Corporation and Partnership returns due?
Hawaii S Corporations file Form N-35 and Partnerships file Form N-20 by April 20, 2028. Qualifying entities may have additional Hawaii pass-through entity taxation election and payment work beyond the annual return.
Which Hawaii pass-through forms are required?
- Form N-35: S Corporation Income Tax Return.
- Form N-20: Partnership Return.
- Forms N-362E and N-362: Hawaii pass-through entity taxation election and reporting forms when the election applies.
What are Hawaii pass-through extension rules?
The projected extended filing deadline for calendar-year Hawaii S Corporation and Partnership returns is October 20, 2028. Payment and election deadlines are not automatically postponed, so confirm the filing-year Forms N-362E and N-362 instructions when released.
When is the Hawaii Individual income tax return due?
Hawaii Individuals file Form N-11 or Form N-15 when residency, Hawaii-source income, and filing thresholds require a return. Calendar-year Individual returns and balances due are due April 20, 2028.
- Form N-11: Resident Individual Income Tax Return.
- Form N-15: Nonresident and Part-Year Resident Income Tax Return.
What Hawaii Individual rates and thresholds apply for 2027?
Tax year 2027 forms, thresholds, and the final 2028 filing-season page are not yet published. Confirm the TY2027 income thresholds, safe-harbor instructions, and rate schedule when DOTAX publishes the filing-year instructions.
When are Hawaii estimated payments due?
Calendar-year Hawaii Individual estimated tax payments are due on the following projected schedule:
- April 20, 2027: First estimated payment.
- June 21, 2027: Second estimated payment, because June 20 falls on a Sunday.
- September 20, 2027: Third estimated payment.
- January 20, 2028: Fourth estimated payment.
Who must make Hawaii estimated payments?
Individuals who expect Hawaii income tax after withholding and credits may need to make estimated payments using Form N-200V. Apply the published TY2027 threshold and safe-harbor instructions when released.
What are Hawaii extension deadlines?
Hawaii extension deadlines are projected to be October 20, 2028 for C Corporations, S Corporations, Partnerships, and Individual returns. The extension is to file only. Tax due should be paid by April 20, 2028.
What Hawaii-specific rules should tax professionals watch for 2027?
- Hawaii uses an April 20 filing calendar for the main corporate, pass-through, and Individual income tax returns.
- General Excise Tax registration, filing, and payment obligations are separate from income-tax compliance.
- A qualifying entity may elect Hawaii pass-through entity taxation, creating entity-level election, payment, reporting, and owner-credit work.
- Tax year 2027 forms and final filing-season instructions are not yet published, so rate, threshold, and safe-harbor details need release-year confirmation.
- Hawaii Tax Online supports account management, filing, correspondence, and payment services for eligible tax types.
Tax-professional context: Hawaii return calendars, entity-level elections, owner reporting, withholding, and payment rules require a state-specific review. TY2027 forms and the final 2028 filing calendar remain subject to confirmation when the state publishes them.
Electronic filing requirements:
- Use Hawaii Tax Online for supported account management, filing, correspondence, and payment services.
- Use approved software for supported corporate, pass-through, and Individual returns.
- Use Hawaii Tax Online for eligible payments and account work.
- Review state electronic-filing mandates separately from federal requirements.
- Keep proof of timely electronic submission and payment with the workpapers.
What sources support these Hawaii dates?
Hawaii tax deadlines and filing workflows
Hawaii deadline work often runs on later filing dates while teams also track estimated payments, excise-tax awareness, and state-specific filing details. Instead's AI-driven tax platform keeps that calendar from getting buried in generic federal workflows.
Use filing to move Hawaii returns forward, workflows to assign recurring deadline tasks, and grids to review what is ready across clients. Built for tax professionals who want a better tax operation system to manage compliance and advisory work for clients.
The material discussed on this page is meant for general illustration and/or informational purposes only and is not to be construed as investment, tax, or legal advice. You must exercise your own independent professional judgment, recognizing that advice should not be based on unreasonable factual or legal assumptions or unreasonably rely upon representations of the client or others. Further, any advice you provide in connection with tax return preparation must comply in full with the requirements of IRS Circular 230.
Please note that if any due date falls on a federal or state holiday or weekend, it may be adjusted to the next business day. Always verify current deadlines with the appropriate tax professional and authorities.
Looking for a different year?
.png){kind=small}