Hawaii tax deadlines in 2026: filing dates and estimated payments
Deadlines that fall in calendar 2026: the 2025 return and the 2026 estimated payments. Different year? See Hawaii 2025 →
Hawaii deadlines in 2026
| 2025 individual return due | April 20, 2026 |
|---|---|
| Extended filing deadline | October 20, 2026 |
| Payment due | April 20, 2026, extension or not |
| Final 2025 estimated payment | January 20, 2026 |
| 2026 estimated payments | April 20, 2026 · June 20, 2026 · September 20, 2026 · January 20, 2027 |
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.
Hawaii estimated tax payments in 2026
You expect to owe at least $500 in Hawaii tax for the year after subtracting withholding and credits, and expect withholding and credits to be less than the smaller of 60% of current-year tax or 100% of prior-year tax.
| Q1 (2026 tax year) | April 20, 2026 |
|---|---|
| Q2 (2026 tax year) | June 20, 2026 |
| Q3 (2026 tax year) | September 20, 2026 |
| Q4 (2026 tax year) | January 20, 2027 |
| Voucher | Form N-200V |
| Underpayment safe harbor | Pay the smaller of 60% of the current-year tax or 100% of the prior-year tax (prior-year return must cover 12 months); penalty figured on Form N-210. |
| Pay online | hitax.hawaii.gov |
Hawaii uses the 20th: April 20, June 20, September 20 and January 20. The January 20 payment is not required if you file the return and pay in full by January 31, 2027. Due-date and safe-harbor source is Tax Facts 2019-3 (still the Department's current estimated-tax publication). Current Form N-200V is Rev. 2025 (files.hawaii.gov/tax/forms/current/n200v_f.pdf); no 2026-specific voucher exists because N-200V is a generic payment voucher. Fiscal-year filers: 20th day of the 4th, 6th, 9th months and 1st month of the next year. The state prints 06/20; when it falls on a weekend the payment is due the next business day. The state prints 09/20; when it falls on a weekend the payment is due the next business day.
Source: files.hawaii.gov, read September 3, 2026. “1st Payment April 20, current year 2nd Payment June 20, current year 3rd Payment September 20, current year 4th Payment January 20, next year”
All 51 jurisdictions in one table: state estimated tax payment dates for 2026.
Hawaii extensions
Every state's rule in one table: which states accept the federal extension in 2026.
| Does Hawaii accept the federal extension? | Not the federal one. The state extension is automatic when the required payment is made by the original due date. |
|---|---|
| Original due date | April 20, 2026 |
| Extended due date | October 20, 2026 |
| Payment | Still due April 20, 2026. The extension is to file, not to pay. The automatic extension applies only if you are due a refund or you pay the properly estimated tax by April 20, 2026; the extension does not give more time to pay. |
| How to get it | Nothing to file; pay any properly estimated tax by April 20, 2026 (Form N-200V payment voucher or Hawaii Tax Online). |
Hawaii does not accept federal extension forms; the state extension is independent of the federal Form 4868 and is conditioned on paying the properly estimated tax.
Source: tax.hawaii.gov, read September 3, 2026. “taxpayers are granted an automatic 6-month extension (no form is required to request the extension) to file the return through October 20, 2026”
Federal deadlines in 2026
| 2025 Form 1040 | April 15, 2026 · extension October 15, 2026 |
|---|---|
| 2025 S-corp (1120-S) & partnership (1065) | March 16, 2026 |
| 2025 C-corp (Form 1120) | April 15, 2026 |
| 2026 federal estimated payments (1040-ES) | April 15, 2026 · June 15, 2026 · September 15, 2026 · January 15, 2027 |
Source: IRS Publication 509 and Form 1040-ES instructions, irs.gov.
Frequently asked questions
When are Hawaii state taxes due in 2026?
Your 2025 Hawaii individual income tax return is 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, 2026, but any tax owed is still due on the original date.
When are Hawaii estimated tax payments due in 2026?
Hawaii estimated payments for the 2026 tax year are due April 20, 2026, June 20, 2026, September 20, 2026, January 20, 2027. Use Form N-200V or pay online. The final installment for 2025 was due January 20, 2026.
Does Hawaii accept the federal extension?
Not the federal one. The state extension is automatic when the required payment is made by the original due date. The extended filing deadline is October 20, 2026, and tax is still due by April 20, 2026.
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.
Dates are the statutory deadlines that fall in 2026 and move to the next business day when they land on a weekend or holiday. Each section links to the source it was checked against. Always confirm with the Hawaii tax agency or the IRS before relying on a date. This is general information, not tax advice.