Hawaii Power of Attorney Laws: Durable, Medical, and Financial POA (2026)

Hawaii adopted the Uniform Power of Attorney Act (UPOAA) in 2014, codified at Haw. Rev. Stat. ch. 551E (sections 551E-1 through 551E-63). The Act brought Hawaii into alignment with a modern, nationally uniform framework for financial powers of attorney. Under this framework, a power of attorney is durable by default, execution requires only a notarized signature, and certain sensitive powers must be expressly authorized. Health care decision-making authority is entirely separate, governed by the Uniform Health-Care Decisions Act at Haw. Rev. Stat. ch. 327E, which has its own execution requirements.

What a Power of Attorney Does in Hawaii

A power of attorney is a written legal instrument in which a principal grants authority to another person, called the agent (or attorney-in-fact), to act on the principal's behalf. The scope of that authority depends entirely on what the document grants. A broad general POA can authorize the agent to manage bank accounts, pay bills, buy or sell real property, file tax returns, manage investments, and conduct virtually any financial or legal transaction. A limited POA confines the agent to a specific act or purpose, such as completing a single real estate closing while the principal is abroad.

Under Haw. Rev. Stat. ch. 551E, any act performed by the agent within the scope of authority granted in a valid POA has the same legal effect as if the principal had acted personally. The act binds the principal and, where relevant, the principal's successors.

A power of attorney, whether durable or not, ends at the principal's death under Haw. Rev. Stat. 551E-6. After death, authority over the estate passes to the personal representative or executor. An agent has no authority to act in the principal's name after the principal has died.

For the full 50-state overview, see our national Power of Attorney guide.

Durable Power of Attorney in Hawaii

The defining feature of Hawaii's UPOAA adoption is the durability default. Under Haw. Rev. Stat. 551E-3, a power of attorney is durable unless it expressly provides that it is terminated by the incapacity of the principal. Durability is the rule; non-durability must be explicitly written into the document.

This default corrects the practical problem that arose under pre-UPOAA law, where a POA that did not expressly address durability would lapse precisely when the principal needed it most, at the onset of incapacity. Under the current statute, a document silent on the question remains fully effective during any period of incapacity.

Hawaii also recognizes what is sometimes called a springing power of attorney under Haw. Rev. Stat. 551E-5. A principal may provide in the POA that it does not become effective until a specified future date or the occurrence of a future event or contingency, most commonly a physician's written certification of incapacity. If the principal designates a springing trigger, the principal may also authorize a specific person to determine in writing whether the triggering event has occurred. If no person is designated, effectiveness is determined by a written statement from a physician, licensed psychologist, attorney-at-law, judge, or appropriate governmental official certifying that the principal is incapacitated.

Most principals prefer an immediately effective durable POA to avoid potential delays in certifying incapacity when the document is needed urgently.

How to Create a Valid Hawaii Power of Attorney

Hawaii's execution requirements under Haw. Rev. Stat. 551E-3 are straightforward compared to states that require multiple witnesses in addition to notarization.

Signature. The principal must sign the power of attorney. If the principal is physically unable to sign, another individual may sign the principal's name in the principal's conscious presence and at the principal's direction.

Notarization. A signature on a power of attorney is presumed to be genuine if the principal acknowledges the signature before a notary public or other individual authorized by law to take acknowledgments. Notarization is not technically required for validity, but an unacknowledged POA does not carry the presumption of genuineness. Banks, financial institutions, and title companies routinely require a notarized and acknowledged instrument. As a practical matter, every Hawaii financial POA should be notarized.

Witnesses. Hawaii's UPOAA does not mandate witness signatures for a general financial power of attorney. The statutory form at Haw. Rev. Stat. 551E-51 calls only for the principal's notarized signature. Some principals and attorneys add witnesses as a precaution, but two witnesses are not required by the statute for a financial POA.

Copies. Under Haw. Rev. Stat. 551E-3, a photocopy or electronically transmitted copy of an original power of attorney has the same legal effect as the original.

Governing law. The meaning and effect of a Hawaii power of attorney is determined by the law of the jurisdiction indicated in the document or, if no jurisdiction is specified, by the law of the jurisdiction in which the POA was executed. Hawaii also recognizes powers of attorney validly executed in other states and under federal law for military personnel.

What a Hawaii Agent Can and Cannot Do

An agent's authority under a Hawaii power of attorney is bounded by two sources: the document itself and the default rules of Haw. Rev. Stat. ch. 551E.

Agent duties. Under Haw. Rev. Stat. 551E-10, an agent must act in accordance with the principal's reasonable expectations to the extent known and, otherwise, in the principal's best interest. The agent must act in good faith, act only within the scope of the authority granted, demonstrate loyalty, avoid conflicts of interest, maintain accurate records of all transactions, and cooperate with any person who has authority to make health-care decisions for the principal. If the principal requests an accounting, the agent must comply within thirty days or provide a written explanation for why more time is needed, then comply within an additional thirty days.

Agent liability. An agent who violates the duties imposed by ch. 551E is personally liable under Haw. Rev. Stat. 551E-13 to restore the value of the principal's property to what it would have been had the violation not occurred, and to reimburse reasonable attorney's fees and costs.

General authority. If the document grants general authority, the agent may exercise the powers described in Haw. Rev. Stat. 551E-34 through 551E-47, which cover real property transactions, tangible personal property, financial institution accounts, operating a business, insurance, estates and trusts, retirement plans, taxes, claims and litigation, and personal and family maintenance.

Hot powers requiring express authorization. Under Haw. Rev. Stat. 551E-31, certain sensitive powers are available only if the POA document expressly grants them. These hot powers include:

• Creating, amending, revoking, or terminating an inter vivos trust
• Making gifts of the principal's property
• Creating or changing rights of survivorship
• Creating or changing a beneficiary designation
• Delegating authority to another person
• Waiving the principal's right to be a beneficiary of a joint and survivor annuity
• Exercising fiduciary powers that the principal has authority to delegate

An agent who is not expressly authorized to make gifts cannot make gifts to themselves or third parties, regardless of how broadly the rest of the document reads. Principals should review the hot-powers list carefully when drafting.

Third-party acceptance. Under Haw. Rev. Stat. 551E-15, a person who in good faith accepts an acknowledged POA without actual knowledge that it has been terminated may rely on it as valid. Under Haw. Rev. Stat. 551E-16, a person who receives a properly presented POA must either accept it or request additional documentation within seven business days, or face potential liability for attorney's fees and a court order to comply. These provisions protect agents and principals against unwarranted refusals by banks and other third parties.

Health-Care Decisions and Medical POA in Hawaii

A financial power of attorney under Haw. Rev. Stat. ch. 551E does not authorize an agent to make health care decisions. Medical decision-making authority in Hawaii requires a completely separate document governed by the Uniform Health-Care Decisions Act at Haw. Rev. Stat. ch. 327E.

Under Haw. Rev. Stat. 327E-3, an adult or emancipated minor may execute an advance health-care directive that combines two components:

Power of attorney for health care. This designates a named agent to make any health-care decision the principal could have made while having capacity. The agent's authority remains in effect notwithstanding the principal's later incapacity. The agent may be authorized to consent to or refuse medical treatment, admit or discharge the principal from a health-care facility, and make end-of-life decisions.

Individual instruction. A separate or combined written statement expressing the principal's own wishes about particular kinds of treatment, such as artificial life support or artificial nutrition and hydration, if a specified condition arises.

Execution requirements for a health-care POA. Under Haw. Rev. Stat. 327E-3, a power of attorney for health care must be in writing, dated, and signed by the principal. The signature must be witnessed or acknowledged by one of two methods: (a) signed by at least two adult witnesses who were present at the signing or at the principal's acknowledgment of the signature (witnesses may not be a health-care provider, an employee of a health-care provider or facility, or the agent; at least one witness must be unrelated to the principal by blood, marriage, or adoption and not entitled to any portion of the principal's estate), or (b) acknowledged before a notary public in the State. The two-witness route and the notarization route are alternatives; either satisfies the statute.

Revocation. Under Haw. Rev. Stat. 327E-4, an advance health-care directive may be revoked at any time and in any manner, regardless of the principal's mental or physical condition. A supervising health-care provider who is informed of a revocation must promptly note it in the patient's record.

Principals who want both financial and medical authority handled by a trusted person must execute both a ch. 551E financial POA and a separate advance health-care directive under ch. 327E. One document does not substitute for the other.

Revoking or Ending a Hawaii Power of Attorney

Under Haw. Rev. Stat. 551E-6, a financial power of attorney terminates when any of the following occur:

• The principal dies
• The principal becomes incapacitated, if the POA is not durable
• The principal revokes the POA
• The POA itself provides for termination upon a date, event, or purpose that has been reached or accomplished
• The purpose of the POA is accomplished
• The agent dies, becomes incapacitated, or resigns, and no successor agent is named

How to revoke. A principal may revoke a financial power of attorney at any time while competent. Revocation is effective when communicated to the agent. There is no prescribed form; a signed written statement delivered to the agent suffices. For added protection, the principal should also notify every institution where the agent has been conducting business.

Protecting third parties. Termination of a POA is not effective as to an agent or third party who, without actual knowledge of the termination, acts in good faith under the instrument. This means that once a principal decides to revoke, prompt written notice to the agent and all relevant institutions is essential to stop the agent's authority from being relied upon by good-faith third parties.

Recording notice. If the agent had authority over real property, recording a notice of revocation with the Bureau of Conveyances in Honolulu provides constructive notice to subsequent purchasers and lenders.

Executing a new POA. Executing a new power of attorney does not automatically revoke an earlier one unless the new document expressly revokes prior instruments. Principals who want a clean transition to a new agent should expressly revoke earlier documents.

At death. A power of attorney, including a durable one, ends automatically and immediately at the principal's death. No further action is required to terminate it. Authority over the estate then passes to the personal representative named in the will or appointed by the probate court.

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This page provides general legal information about Hawaii power of attorney laws and is not legal advice. Hawaii estate planning involves individual circumstances that a licensed Hawaii attorney can assess. Consult a qualified Hawaii attorney before executing or relying on any power of attorney or advance health-care directive.

Statutes cited reflect their in-force version as of May 31, 2026.