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Hawaii GET filing deadlines 2026

When Form G-45 and the annual G-49 are due in 2026, by filing frequency. Returns are due the 20th day of the month after the period closes.

Quick answer: Quarterly G-45s for 2026 are due Apr 20, Jul 20, Oct 20 (2026) and Jan 20, 2027. The annual G-49 for calendar-year 2025 is due Apr 20, 2026.

Quarterly filers

Most small businesses file quarterly. Each G-45 covers a calendar quarter and is due the 20th of the following month.

PeriodCoversForm G-45 due
Q1 2026Jan – Mar 2026Mon, Apr 20, 2026
Q2 2026Apr – Jun 2026Mon, Jul 20, 2026
Q3 2026Jul – Sep 2026Tue, Oct 20, 2026
Q4 2026Oct – Dec 2026Wed, Jan 20, 2027

Monthly filers

If you owe more than $4,000 in GET per year you file monthly — each month’s G-45 is due the 20th of the next month (e.g. January is due Feb 20, 2026; February is due Mar 20, 2026, and so on through the year).

Semiannual filers

PeriodCoversForm G-45 due
1st half 2026Jan – Jun 2026Mon, Jul 20, 2026
2nd half 2026Jul – Dec 2026Wed, Jan 20, 2027

Annual reconciliation (Form G-49)

Every GET taxpayer also files an annual return, Form G-49, due by the 20th day of the 4th month after your tax year ends. For a calendar-year business, the 2025 G-49 is due Mon, Apr 20, 2026.

Tax yearForm G-49 due
Calendar year 2025Mon, Apr 20, 2026
Calendar year 2026Tue, Apr 20, 2027
Never circle a deadline again. openbooks.fyi tracks your assigned schedule, prepares each G-45 from your closed books, and files it before the due date — then files the annual G-49. You approve; we file; you get the confirmation.
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A due date that falls on a Saturday, Sunday, or legal holiday moves to the next business day. All 2026 dates above fall on weekdays. This page is general information, not tax advice — confirm current deadlines with the Hawaii Department of Taxation (tax.hawaii.gov).

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