Hawaii State Tax Guide
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Hawaii State Tax Guide
Extension rules
Extension type: Automatic State Extension · Form N-101A (Application for Automatic Extension of Time to File Hawaii Individual Income Tax Return)
For most people. Hawaii automatically grants you a 6-month extension to file your return. No paper or electronic application form is required to request the extra time if you meet either of these conditions If you owe taxes. If you estimate that you will owe a balance to Hawaii, you must file a state extension form to submit your payment on or before the April 20 deadline. If you do not pay your estimated tax liability by the deadline, your automatic extension is voided.
If you owe tax: If you owe taxes. If you estimate that you will owe a balance to Hawaii, you must file a state extension form to submit your payment on or before the April 20 deadline. If you do not pay your estimated tax liability by the deadline, your automatic extension is voided. You must pay 100% of your properly estimated Hawaii tax liability by the April deadline.
If you owe $0: No form needed if you owe $0 For most people. Hawaii automatically grants you a 6-month extension to file your return. No paper or electronic application form is required to request the extra time if you meet either of these conditions
How to request
- Online: Electronic Filing (Highly Recommended): You can pay your estimated tax balance securely online without an account via the Hawaii Tax Online (HITax). Select the option to make a one-time payment for an individual income tax extension.
- Mail: Paper Form: If mailing a physical check, you must use Form N-101A (Application for Automatic Extension of Time to File Hawaii Individual Income Tax Return).
You generally must pay at least 90% of your total Hawaii tax liability by April 20 and use form Form N-101A
Hawaii Tax — Tax year information
Relevant Links
Hawaii Key deadlines (tax year 2025, return filed in 2026)
- Filing deadline: Apr 20, 2026
- Extension request deadline: Apr 20, 2026 — April 20 (Hawaii has a unique statutory deadline that is a few days later than the federal deadline).
- Extended return deadline: Oct 20, 2026 (6-month extension)
- Payment deadline: Apr 20, 2026
- Differs from federal: Yes — Extension Request & Payment Due Date: April 20 (Hawaii has a unique statutory deadline that is a few days later than the federal deadline).
You generally must pay at least 90% of your total Hawaii tax liability by April 20 and use form Form N-101A
Extended Filing Deadline: October 20. Hawaii grants most individual taxpayers an automatic six-month extension of time to file unless you expect to owe Hawaii Income Tax in which case you need to file Form N-101A with your estimated tax payment.
Payment rules
You must pay 100% of your properly estimated Hawaii tax liability by the April deadline. • Late Filing Penalty: If your extension is voided because you didn't pay on time, a penalty of 5% per month (up to 25%) will be assessed on the unpaid tax from the original due date. • Late Payment Penalty: If you file your return on time but pay late, you face a 20% penalty on the tax unpaid within 60 days of the due date. • Interest: Interest will accrue on any unpaid tax balance at a rate of 2/3 of 1% per month (or fraction of a month).
Official payment portal
Payment options
- Hawaii Tax Online (HITax)
- Form N-200V
- Form D-100 (Request for Installment Plan Agreement)
Payment plan availability
Available: Yes
Eligibility: Standard online payment plans are available if you owe $10,000 or less (including penalties and interest) and are caught up on all past tax filings. Repayment periods are typically limited to 12 months and require automatic ACH bank withdrawals. Fees & Conditions: There is a non-refundable $50 processing fee to establish a plan. Interest and penalties will continue to stack up on the remaining unpaid balance while you make payments. How to Apply: Once your tax return is processed and you receive a collection billing notice with a Case Number, you can apply online through your logged-in account on Hawaii Tax Online (HITax). If you owe more than $10,000, require a longer repayment period, or prefer to apply by mail, you must complete and submit paper Form D-100 (Request for Installment Plan Agreement).
Filing forms
Regular filing
- Form N-200V - Individual Income Tax Payment / Extension voucher · Download form
- Form D-100 - Request for Installment Plan Agreement
Extension
- Form N-101A - Application for Automatic Extension of Time to File Hawaii Individual Income Tax Return
Hawaii Refund Tracking
Processing time: Go directly to the Hawaii Tax Online (HITax) and click the "Where's My Refund" link.
Do I need to file?
For most people. Hawaii automatically grants you a 6-month extension to file your return. No paper or electronic application form is required to request the extra time if you meet either of these conditions If you owe taxes. If you estimate that you will owe a balance to Hawaii, you must file a state extension form to submit your payment on or before the April 20 deadline. If you do not pay your estimated tax liability by the deadline, your automatic extension is voided.
- Residents: For most people. Hawaii automatically grants you a 6-month extension to file your return. No paper or electronic application form is required to request the extra time if you meet either of these conditions
- Part-year residents: If you owe taxes. If you estimate that you will owe a balance to Hawaii, you must file a state extension form to submit your payment on or before the April 20 deadline. If you do not pay your estimated tax liability by the deadline, your automatic extension is voided.
- Nonresidents: If you owe taxes. If you estimate that you will owe a balance to Hawaii, you must file a state extension form to submit your payment on or before the April 20 deadline. If you do not pay your estimated tax liability by the deadline, your automatic extension is voided.
Filing methods
Online filing
Electronic Filing (Highly Recommended): You can pay your estimated tax balance securely online without an account via the Hawaii Tax Online (HITax). Select the option to make a one-time payment for an individual income tax extension.
Mail filing
Paper Form: If mailing a physical check, you must use Form N-101A (Application for Automatic Extension of Time to File Hawaii Individual Income Tax Return).
