Hawaii tax deadlines (2025 tax year)
For returns filed in 2026. Different year? See Hawaii 2026 deadlines →
Hawaii state deadlines (2025 tax year)
| Individual return (filing) | April 20, 2026 |
|---|---|
| Extended filing deadline | October 20, 2026 |
| Estimated payments | April 20 · June 20 · September 20 · January 20 |
Individual returns are due April 20 (not April 15). Automatic 6-month extension to October 20 if properly estimated tax is paid by April 20. Estimated payments fall on the 20th.
Federal deadlines that still apply (2025 tax year)
| Individual (Form 1040) | April 15, 2026 · extension October 15, 2026 |
|---|---|
| S-corp (1120-S) & partnership (1065) | March 16, 2026 |
| C-corp (Form 1120) | April 15, 2026 |
| Estimated payments | April 15, 2025 · June 16, 2025 · September 15, 2025 · January 15, 2026 |
Frequently asked questions
When are Hawaii state taxes due for the 2025 tax year?
Hawaii individual income tax returns for 2025 are due April 20, 2026. If that date falls on a weekend or legal holiday, the deadline moves to the next business day. An extension moves the filing deadline to October 20, but any tax owed is still due on the original date.
Does a Hawaii extension give me more time to pay?
No. An extension extends the time to file, not to pay. To avoid penalties and interest, pay what you expect to owe by April 20, 2026.
When are Hawaii estimated tax payments due?
Quarterly estimated payments are generally due April 20, June 20, September 20, January 20. Confirm the current-year dates with the Hawaii Department of Revenue.
Dates are the standard statutory deadlines for the 2025 tax year and move to the next business day when they fall on a weekend or holiday. Always confirm the current dates with the Hawaii Department of Revenue or the IRS. This is general information, not tax advice.