Hawaii Last Will and Testament: Signing, Probate, and Taxes

A Hawaii last will and testament is valid when an adult of sound mind signs a written document in front of two competent witnesses who then sign it themselves, under the Hawaii Uniform Probate Code at Title 30A, Chapter 560 of the Hawaii Revised Statutes.¹ Get the signing formalities right and the document controls your probate estate. Get them wrong and a court will set it aside, leaving the state’s intestacy rules to decide who inherits.

Who Can Make a Will

You must be at least 18 years old and of sound mind.² Sound mind means you understand what you own, who your natural heirs are, and that you are directing where your property goes after death. There is no minimum estate size and no property-ownership requirement.

How to Sign a Valid Will

Hawaii recognizes two kinds of wills, and either can be made self-proving.

Witnessed Wills

The standard will must be in writing and signed by you, or by someone signing your name in your conscious presence at your direction. Two witnesses must then sign within a reasonable time after watching you sign, or after you acknowledge your signature or the will to them.³

Witnesses must be generally competent, meaning they could testify in court if needed. A beneficiary can serve as a witness without invalidating the will or the gift to them,⁴ but using disinterested witnesses avoids any argument about undue influence.

Holographic Wills

A holographic will needs no witnesses, but your signature and the material portions of the document, meaning the language identifying who gets what, must be in your own handwriting.³ It can work in an emergency, but with no witnesses to confirm your intent, disputes are more common. A properly witnessed will is almost always the safer choice.

Self-Proving Affidavit

A self-proving affidavit lets your will be admitted to probate without your witnesses having to appear in court to confirm their signatures. You and both witnesses sign the affidavit before a notary or other officer authorized to administer oaths, either when you sign the will or any time afterward.⁵ There is essentially no reason to skip it.

What to Put in the Will

Name a Personal Representative

Hawaii calls the person who administers your estate your personal representative. They gather assets, pay debts and taxes, and distribute what remains. Pick someone you trust to handle money and deal with courts and creditors, and name an alternate in case your first choice cannot serve. The court or registrar issues letters testamentary that serve as their authority to act.⁶

Name a Guardian for Minor Children

A parent can nominate a guardian for a minor child, or any future minor child, by will or other signed writing.⁷ A court still has to confirm the appointment, but judges give strong weight to a parent’s written choice. Without one, the judge picks with no guidance from you.

Distribute Property

You can leave specific items or accounts to named people (specific bequests), and then direct the remainder, your residuary estate, by percentage shares. A clean residuary clause is the safety net that catches anything you forgot to mention.

Address Digital Assets

Hawaii has adopted the Revised Uniform Fiduciary Access to Digital Assets Act. Your will should expressly grant your personal representative authority over digital accounts and identify the categories you hold, such as email, social media, cloud storage, or cryptocurrency.

Do not put passwords, private keys, or seed phrases in the will itself. Probated wills become public records, and publishing that information creates a serious security risk. Keep access instructions in a separate secure document and tell your personal representative where to find it.

What a Will Cannot Do

It Cannot Fully Disinherit Your Spouse

Even if your will leaves your spouse nothing, the surviving spouse can claim an elective share equal to 50% of the marital-property portion of the augmented estate.⁸ The augmented estate includes probate assets, certain nonprobate transfers, and property the surviving spouse already owns. The same right extends to a reciprocal beneficiary, a Hawaii-specific status for two people legally prohibited from marrying each other who register for many of the protections given to married couples. If you intend to leave your spouse less than this formula produces, expect a challenge and plan with a professional.

It Cannot Override Beneficiary Designations

Some assets pass outside your will no matter what it says. Property held in joint tenancy goes to the surviving owner. Life insurance proceeds, retirement accounts such as IRAs and 401(k)s, and payable-on-death bank accounts go to whoever is named on the account itself. Review those beneficiary forms alongside your will. Leaving an ex-spouse on a life insurance policy after updating a will is a common and expensive mistake.

Intestacy If No Valid Will Exists

Without a valid will, Hawaii’s intestacy statutes decide who inherits, following a strict family hierarchy with no room for personal wishes or verbal promises. A surviving spouse or reciprocal beneficiary takes the entire estate when the deceased leaves no descendants or parents, or when all surviving descendants are also descendants of the surviving spouse and the spouse has no other descendants.⁹

When the family picture is more complicated, the spouse’s share shrinks:

No descendants but a surviving parent: the spouse receives the first $400,000 plus three-fourths of the balance.
All descendants are shared with the spouse, but the spouse has other children: the first $330,000 plus half the balance.
One or more of the deceased’s descendants are not the surviving spouse’s: the first $220,000 plus half the balance.⁹

With no surviving spouse, the estate passes to descendants, then parents, then siblings and their descendants, then grandparents or their descendants. An unmarried partner, a close friend, or a charity receives nothing under intestacy. A will is the only route to anyone outside the statutory hierarchy.

Changing or Revoking a Will

Codicils

A codicil amends an existing will and must be executed with the same formalities: in writing, signed by you, and witnessed by two people.³ Codicils suit small changes. For significant rewrites, a new will is usually cleaner.

Revocation

You can revoke a will two ways.¹⁰ First, execute a new will that either expressly revokes the old one or is so inconsistent it effectively replaces it. A new will that disposes of your entire estate is presumed to replace the old one; a new will that covers only part is presumed to supplement rather than replace.

Second, physically destroy the will by burning, tearing, canceling, or obliterating it with intent to revoke. Someone else may do the destroying if they act in your conscious presence at your direction. The act counts even if it does not touch the printed words.¹⁰

Divorce Revokes Provisions Automatically

Once a divorce or annulment is final, Hawaii law automatically revokes any will provision benefiting the former spouse, including gifts, fiduciary appointments, and powers of appointment given to the ex-spouse or their relatives. The ex is treated as having disclaimed the interest, unless the will explicitly says otherwise.¹¹ The same rule applies when a reciprocal beneficiary relationship ends. Even so, execute a new will after a divorce to state your current wishes clearly.

No-Contest Clauses

A no-contest clause threatens to disinherit any beneficiary who challenges the will. Hawaii courts enforce them, but the clause will not apply if the challenger had probable cause to bring the contest.¹² A beneficiary with a legitimate basis to question capacity or coercion keeps their inheritance; the clause mainly discourages frivolous challenges.

After Death: Probate and Taxes

Informal Probate

Most uncontested estates go through informal probate. The application goes to the registrar rather than a judge, and the personal representative can be appointed without a formal hearing.¹³ The registrar checks that the application is complete, that venue is proper, and that the proposed personal representative has priority.¹⁴ It is faster and cheaper than the formal track.

Formal Probate

Formal probate is required when someone contests the will’s validity, the will’s meaning is disputed, or the estate is complex enough to need judicial oversight. A judge formally appoints the personal representative and resolves disputes. A self-proving affidavit and clearly drafted terms help keep an estate in the informal lane.

Small Estate Affidavit

If the deceased’s personal property in Hawaii, excluding motor vehicles, is worth $100,000 or less, an heir or beneficiary may be able to collect those assets with a small estate affidavit instead of opening a probate case.¹⁵ This process does not cover real estate.

Hawaii Estate Tax

Hawaii imposes its own estate tax on top of the federal one, with a much lower threshold. The state exclusion is tied to the federal applicable exclusion amount as it stood under the Internal Revenue Code on December 21, 2017, adjusted for inflation.¹⁶ As of 2025 it was $5,490,000.¹⁷ Rates run from 10% on the first $1 million of taxable estate up to 20% on amounts above $10 million. Hawaii real property values make this a practical concern for more families than the federal exemption would suggest.

1
Justia. Hawaii Code Chapter 560 – Uniform Probate Code
2
Justia. Hawaii Code 560:2-501 – Who May Make Will
3
Justia. Hawaii Code 560:2-502 – Execution; Witnessed Wills; Holographic Wills
4
Justia. Hawaii Code 560:2-505 – Who May Witness
5
Justia. Hawaii Code 560:2-504 – Self-Proved Will
6
Justia. Hawaii Code 560:1-201 – General Definitions
7
Justia. Hawaii Code 560:5-202 – Parental Appointment of Guardian
8
Justia. Hawaii Code 560:2-202 – Elective Share
9
Justia. Hawaii Code 560:2-102 – Share of Spouse or Reciprocal Beneficiary
10
Justia. Hawaii Code 560:2-507 – Revocation by Writing or by Act
11
Justia. Hawaii Code 560:2-804 – Revocation of Probate and Nonprobate Transfers by Divorce or Termination of Reciprocal Beneficiary Relationship
12
Justia. Hawaii Code 560:3-905 – Penalty Clause for Contest
13
Justia. Hawaii Code 560:3-301 – Informal Probate or Appointment Proceedings; Application; Contents
14
Justia. Hawaii Code 560:3-308 – Informal Appointment Proceedings; Proof and Findings Required
15
The Judiciary State of Hawaiʻi. Affidavit for Collection of Personal Property
16
Hawaii Department of Taxation. Chapter 236E – Estate and Generation-Skipping Transfer Tax
17
Hawaii Department of Taxation. Outline of the Hawaii Tax System as of July 1, 2025