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

A California power of attorney (POA) lets one person (the principal) authorize another (the attorney-in-fact, or agent) to manage financial, legal, or property matters on their behalf. California governs financial POAs under its own Power of Attorney Law, Cal. Prob. Code sections 4000-4545, not the Uniform Power of Attorney Act. To survive the principal's incapacity, the document must expressly state it is durable. Healthcare decisions are handled under a completely separate statute.

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

What a Power of Attorney Does in California

A power of attorney is a written document by which a principal grants an agent authority to act on their behalf. The scope can be broad (covering real estate, banking, business operations, and more) or narrow (limited to a single transaction or subject). California law defines "power of attorney" under Cal. Prob. Code section 4022 as a written instrument granting authority to an attorney-in-fact.

The agent acts in a fiduciary capacity. Under Cal. Prob. Code section 4231, the agent must meet the standard of care of a prudent person dealing with another's property. An agent with special skills (such as a financial professional) is held to the higher standard of others with similar expertise.

California also offers a Uniform Statutory Form Power of Attorney under Cal. Prob. Code sections 4400-4465. This pre-approved form, most recently revised effective January 1, 2012, covers common financial subjects and is widely accepted by banks and other institutions.

Durable vs. Non-Durable Power of Attorney in California

By default, a POA executed in California is non-durable: it terminates if the principal loses legal capacity to contract. A non-durable POA is typically used for a specific transaction while the principal is fully competent.

A durable POA remains effective even after the principal becomes incapacitated. Under Cal. Prob. Code section 4124, durability requires express language in the document. Acceptable phrases include:

• "This power of attorney shall not be affected by subsequent incapacity of the principal."
• "This power of attorney shall become effective upon the incapacity of the principal." (This creates a "springing" durable POA, which only activates upon incapacity.)
• Any similar words clearly showing the principal intends authority to continue despite incapacity.

Without one of these phrases, the document is non-durable and ends the moment the principal becomes incapacitated. Most estate planning POAs use the first option to ensure continuous authority.

How to Create a Valid California Power of Attorney

Under Cal. Prob. Code section 4121, a California POA is legally sufficient when all of the following are satisfied:

1. Principal's signature. The document must be signed by the principal, or by another adult in the principal's presence and at the principal's direction if the principal is unable to sign personally.

2. Date. The document must state the date of execution.

3. Notary or two witnesses. The principal's signature must be either acknowledged before a notary public OR signed in the presence of at least two adult witnesses. The witnesses must personally observe the principal sign or hear the principal acknowledge the signature, per Cal. Prob. Code section 4122. The named attorney-in-fact cannot serve as a witness.

For the statutory form POA under Cal. Prob. Code section 4402, acknowledgment before a notary is required. Recording the document with the county recorder is required only if the POA will be used for real estate transactions.

What a California Agent Can and Cannot Do

General Financial Authority

An agent's authority is limited to what the POA document expressly grants, plus actions incidental and necessary to carry out that authority (Cal. Prob. Code section 4262). A broadly drafted POA can authorize banking, investing, paying bills, managing real estate, operating a business, handling tax matters, and similar financial tasks.

Fiduciary Duties

The agent must act solely in the interest of the principal and avoid conflicts of interest (Cal. Prob. Code section 4232). California law does not require an agent to act unless they have agreed in writing to do so, but once the agent begins a task they must complete it (Cal. Prob. Code section 4230).

Hot Powers (Require Express Authorization)

Certain high-risk actions cannot be taken unless the POA document specifically and expressly authorizes them. Under Cal. Prob. Code section 4264, these "hot powers" include:

• Creating, modifying, revoking, or terminating a trust
• Making gifts of the principal's property
• Changing beneficiary designations on accounts or insurance
• Creating or altering survivorship rights in property
• Disclaiming estate or trust interests
• Making loans to the agent (self-dealing)
• Funding trusts not originally created by the principal

If the document does not mention these powers, the agent simply cannot exercise them. Principals should think carefully before including any hot power.

Medical Power of Attorney in California

California does not use a "medical power of attorney" as a standalone instrument. Healthcare decision-making authority is governed by an entirely separate statute: the Health Care Decisions Law, Cal. Prob. Code sections 4600-4806.

The vehicle for delegating healthcare authority is the Advance Health Care Directive (AHCD). A single AHCD document can appoint a health care agent, set personal instructions for future care, or both. The optional statutory form is found at Cal. Prob. Code section 4701.

Execution requirements for an AHCD differ from those for a financial POA. An AHCD must be signed by two qualified witnesses OR acknowledged before a notary. Witness restrictions are strict: a witness cannot be the named health care agent, the principal's health care provider, an employee of that provider, an operator or employee of a community care facility or residential care facility for the elderly (Cal. Prob. Code section 4674). At least one of the two witnesses must be a person who is not related to the principal by blood, marriage, or adoption and is not entitled to any portion of the principal's estate (Cal. Prob. Code section 4674(e)). Patients in a skilled nursing facility also need a patient advocate or ombudsman signature.

A financial POA does not authorize healthcare decisions, and an AHCD does not authorize financial decisions. These are separate documents serving separate purposes.

Revoking or Ending a California Power of Attorney

How to Revoke

A principal retains the right to revoke a POA at any time while they have legal capacity. Under Cal. Prob. Code section 4153, revocation can occur in three ways:

1. By the document's own terms (for example, a POA that expires on a set date).
2. By direct notice to the agent, orally or in writing, that authority is revoked. This right cannot be waived or limited by the POA itself.
3. By the principal's court-appointed conservator or legal representative, with court approval, by written notice to the agent.

Third parties and agents who act in good faith without knowledge of a revocation are protected from liability under Chapter 5 of the Probate Code. For this reason, revoking a recorded POA used for real estate also requires recording a Notice of Revocation with the same county recorder.

Automatic Termination

Under Cal. Prob. Code section 4152, a POA also ends automatically upon:

• The death of the principal (the POA cannot authorize action after death)
• The principal's dissolution or annulment of marriage to the agent
• The death, resignation, removal, or incapacity of the agent (unless the POA names a successor agent)
• Fulfillment of the POA's stated purpose

A durable POA does NOT survive the principal's death. At death, the executor or administrator of the estate takes over; an agent has no authority to act after that point.

More California Laws

• California Data Privacy Laws
• California Data Privacy Laws
• California Data Privacy Laws
• California Data Privacy Laws
• California Data Privacy Laws
• California Recording Laws
• California Recording Laws
• California Expungement Laws

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

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