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

A Massachusetts power of attorney (POA) lets a principal authorize an agent (called an attorney-in-fact) to handle financial, legal, or property matters on their behalf. Financial and property POAs in Massachusetts are governed by the state's own version of the Uniform Probate Code, G.L. ch. 190B, Article V, sections 5-501 through 5-507, a framework Massachusetts adopted rather than the 2006 Uniform Power of Attorney Act (UPOAA). Healthcare decisions require an entirely separate instrument: a Health Care Proxy under G.L. ch. 201D. To be durable (meaning it survives the principal's incapacity), a Massachusetts POA must contain express durability language; the statute provides model phrases and imposes no notarization or witness requirement for the financial document itself, though notarization is strongly advisable in practice.

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

What a Power of Attorney Does in Massachusetts

A power of attorney is a written document through which a principal grants an agent authority to act on the principal's behalf. In Massachusetts, the agent's authority is limited to what the document expressly grants, together with actions reasonably necessary to carry out that grant. A POA can be broad (covering banking, investments, real estate, business operations, tax matters, and more) or narrowly tailored to a single transaction or time period.

Agents under a Massachusetts POA act in a fiduciary capacity. They must act in the principal's best interest, keep records, and avoid self-dealing. The POA does not give the agent authority to make healthcare decisions; that requires a separate Health Care Proxy.

Under G.L. ch. 190B, section 5-506, an agent whose authority under a valid durable POA is unreasonably refused by a third party may prosecute a legal action for damages on the principal's behalf. Third parties who rely in good faith on a durable POA are protected from liability by section 5-507.

Durable Power of Attorney in Massachusetts

Without durability language, a Massachusetts POA automatically terminates when the principal becomes legally incapacitated - exactly when it is often needed most. A durable POA avoids this problem by remaining effective through periods of incapacity.

Under G.L. ch. 190B, section 5-501, a durable power of attorney must be a written instrument that contains language demonstrating the principal's intent that authority continue despite future disability or incapacity. The statute provides two model phrases:

• "This power of attorney shall not be affected by subsequent disability or incapacity of the principal, or lapse of time."
• "This power of attorney shall become effective upon the disability or incapacity of the principal."

The second phrasing creates a springing durable POA, one that is dormant until the principal becomes incapacitated and then activates. A non-springing (immediate) durable POA takes effect upon signing and remains effective through incapacity.

Under section 5-502, all acts performed by an agent under a durable POA during the principal's incapacity have the same legal effect as if the principal were fully competent. Unless the document states a termination date or event, the power continues indefinitely.

Massachusetts does not have a statutory short form for financial durable POAs. Unlike some states, the UPC Article V framework leaves drafting entirely to the parties, which means the document's scope of authority is whatever the principal grants in writing.

How to Create a Valid Massachusetts Power of Attorney

For a financial durable POA under G.L. ch. 190B, Article V, the core statutory requirement is a written instrument signed by the principal that contains the required durability language. The statute does not itself mandate witnesses or notarization for the financial document to be legally effective between principal and agent.

In practice, however, notarization is strongly advised for several reasons:

Real estate transactions. Under G.L. ch. 183, any instrument affecting title to Massachusetts real property must be acknowledged before a notary public or justice of the peace to be recorded at the Registry of Deeds. A POA used to convey, mortgage, or otherwise encumber real estate must therefore be notarized to be recorded and to give constructive notice.

Third-party acceptance. Banks, financial institutions, and title companies will typically require a notarized POA before honoring it. Even where the statute does not require notarization, a notarized document is far more likely to be accepted without challenge.

Proof of execution. Notarization provides evidence that the principal signed knowingly and voluntarily, reducing the risk of a later capacity challenge.

For a health care proxy, the execution requirements are distinct and are discussed in the Health Care Proxy section below.

A principal must be a competent adult at the time of signing. The agent need not sign the POA document to accept authority, but may disclaim by refusing to act.

What a Massachusetts Agent Can and Cannot Do

General Financial Authority

An agent's authority under a Massachusetts POA is bounded by what the document grants. A broadly drafted POA can authorize the agent to manage bank accounts, buy or sell real property, handle investments, pay taxes, operate a business, make contracts, and take other legal actions the principal could take personally.

Limitations

Under Massachusetts law, even a broad POA does not allow the agent to:

• Make or change a will on the principal's behalf (testamentary acts require personal action by the testator)
• Make healthcare or medical decisions (those require a Health Care Proxy under ch. 201D)
• Act after the principal's death (authority terminates at death; the estate then passes to an executor or administrator)
• Vote on the principal's behalf
• Take actions the document does not authorize

High-risk powers - such as making gifts of the principal's property, changing beneficiary designations, or creating trusts - should be expressly addressed in the document if the principal intends to grant them. Because Massachusetts has no statutory list of enumerated "hot powers," the document controls.

Court-Appointed Fiduciary

If a court appoints a conservator, guardian of the estate, or similar fiduciary after the POA is executed, section 5-503 makes the agent accountable to that fiduciary as well as to the principal. The fiduciary holds the same revocation power the principal would have had if competent. A principal may also nominate a preferred conservator or guardian in the durable POA, and the court must follow that nomination unless there is good cause to deviate or the nominee is disqualified.

Health Care Proxy in Massachusetts

Massachusetts addresses healthcare decision-making through a completely separate statute: the Health Care Proxy Act, G.L. ch. 201D. A financial durable POA under ch. 190B does not authorize healthcare decisions, and a health care proxy does not authorize financial decisions. These are distinct documents with distinct legal frameworks.

What a Health Care Proxy Does

A health care proxy designates an agent to make any and all healthcare decisions the principal could make, including decisions about life-sustaining treatment, when the principal lacks the capacity to make or communicate those decisions. Under ch. 201D, section 5, the agent may access confidential medical records and receives the same authority over treatment decisions as a competent principal. Healthcare providers must comply with the agent's decisions to the same extent as a competent principal's decisions.

Execution Requirements for a Health Care Proxy

Under ch. 201D, section 2, a valid Massachusetts health care proxy must be:

1. In writing and signed by the principal (or signed at the principal's direction if the principal cannot sign personally)
2. Witnessed by two adults who subscribe their names and affirm in writing that the principal appeared to be at least 18 years of age, of sound mind, and under no constraint or undue influence

The named health care agent may not serve as a witness. No notarization is required. A principal may also designate an alternate agent who becomes active if the primary agent is unavailable, unwilling, or disqualified.

When the Proxy Becomes Effective

Under ch. 201D, section 6, the proxy activates only after the attending physician makes a written determination that the principal lacks the capacity to make or communicate healthcare decisions, documenting the cause, nature, extent, and probable duration of the incapacity. If the physician later determines the principal has regained capacity, the agent's authority pauses - though it recommences if capacity is lost again.

Even after a capacity determination, if the principal objects to an agent's healthcare decision, the principal's own decision controls unless a court has separately determined the principal lacks capacity.

Revoking or Ending a Massachusetts Power of Attorney

Revoking a Financial Durable POA

A principal may revoke a durable POA at any time while they retain legal capacity. Revocation should be communicated to the agent in writing; best practice also includes notifying any financial institutions or other third parties holding a copy. If the POA was recorded at the Registry of Deeds for real estate purposes, recording a written revocation provides constructive notice and protects against agents or third parties who might later claim they lacked actual knowledge.

Under section 5-504, revocation does not affect an agent or third party who acts in good faith without actual knowledge of the revocation. For recorded real estate instruments, actual knowledge requires receipt of the written revocation or, where the POA was recorded, proper recording of the revocation notice.

Under section 5-505, an affidavit by the agent stating they had no knowledge of termination or revocation at the time of exercise is conclusive proof of non-termination.

Automatic Termination

A Massachusetts durable POA ends automatically upon:

• The death of the principal - the POA cannot authorize any act after the principal's death; at that point, an executor or personal representative takes over
• Fulfillment of the POA's stated purpose (if a limited or special POA)
• A stated expiration date or event in the document
• Court order revoking or limiting the agent's authority

A durable POA does not survive death. It survives incapacity only.

Revoking a Health Care Proxy

Under ch. 201D, section 7, a principal may revoke a health care proxy at any time by notifying the agent or a healthcare provider orally, in writing, or by any act showing a specific intent to revoke. A proxy is automatically revoked when the principal executes a new one, or upon divorce or legal separation if the named agent is the principal's spouse. Every principal is presumed to have capacity to revoke unless a court determines otherwise.

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Disclaimer: This page provides general legal information about Massachusetts power of attorney laws and is not legal advice. Laws change, and individual circumstances vary. Consult a licensed Massachusetts attorney for advice specific to your situation.

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