Hawaii tax deadlines in 2027: filing dates and estimated payments
Deadlines that fall in calendar 2027: the 2026 return and the 2027 estimated payments. Different year? See Hawaii 2025 →
Hawaii deadlines in 2027
| 2026 individual return due | April 20, 2027 |
|---|---|
| Extended filing deadline | October 20, 2027 |
| Payment due | April 20, 2027, extension or not |
| Final 2026 estimated payment | January 20, 2027 |
| 2027 estimated payments | April 20, 2027 · June 20, 2027 · September 20, 2027 · January 20, 2028 |
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 2027
Hawaii estimated payments for the 2027 tax year follow the standard schedule: April 20, 2027, June 20, 2027, September 20, 2027, January 20, 2028. Confirm the current-year voucher and any state-specific threshold with the Hawaii tax agency.
Source: tax.hawaii.gov.
Hawaii extensions
An extension moves the Hawaii filing deadline to October 20, 2027. It does not move the payment date: pay what you expect to owe by April 20, 2027. Confirm with the Hawaii tax agency whether the federal extension is honored automatically or a state form is required.
Federal deadlines in 2027
| 2026 Form 1040 | April 15, 2027 · extension October 15, 2027 |
|---|---|
| 2026 S-corp (1120-S) & partnership (1065) | March 15, 2027 |
| 2026 C-corp (Form 1120) | April 15, 2027 |
| 2027 federal estimated payments (1040-ES) | April 15, 2027 · June 15, 2027 · September 15, 2027 · January 18, 2028 |
Source: IRS Publication 509 and Form 1040-ES instructions, irs.gov.
Frequently asked questions
When are Hawaii state taxes due in 2027?
Your 2026 Hawaii individual income tax return is due April 20, 2027. 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, 2027, but any tax owed is still due on the original date.
When are Hawaii estimated tax payments due in 2027?
Hawaii estimated payments for the 2027 tax year are due April 20, 2027, June 20, 2027, September 20, 2027, January 20, 2028. The final installment for 2026 was due January 20, 2027.
Does Hawaii accept the federal extension?
An extension moves the Hawaii filing deadline to October 20, 2027. It does not extend the time to pay: pay what you expect to owe by April 20, 2027 to avoid penalties and interest.
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, 2027.
Dates are the statutory deadlines that fall in 2027 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.