Fiduciary Duties of a Trustee in California

Saying yes to being a trustee is not just a family favor. It makes you a fiduciary, and California holds fiduciaries to the highest standard the law recognizes. The fiduciary duties of a trustee in California come from Probate Code sections 16000 through 16105, and they boil down to five obligations: administer the trust exactly as written, act solely for the beneficiaries, treat beneficiaries impartially, manage the assets with prudence, and keep beneficiaries informed.

Break one of them and a court can order you to repay the trust out of your own pocket. Most trustees who get into trouble are not bad people. They are well-meaning family members who did not know the rules applied to them.

What Are the Fiduciary Duties of a Trustee in California?

California’s trust law spells out a trustee’s obligations in detail. The core duties every trustee carries include:

• Duty to administer the trust (section 16000). Follow the trust document and California law, not your own sense of what would be fairer.
• Duty of loyalty (section 16002). Administer the trust solely in the interest of the beneficiaries.
• Duty of impartiality (section 16003). Do not favor one beneficiary over another unless the trust says to.
• Duty to avoid conflicts of interest (section 16004). No self-dealing.
• Duty to preserve and make property productive (sections 16006 and 16007).
• Duty to keep trust property separate (section 16009). No commingling with your own money.
• Duty of prudent administration (section 16040) and prudent investing (sections 16045 through 16054).
• Duty to inform and account (sections 16060 and 16062).

Notice what is missing from that list: any duty to keep the peace, to be liked, or to do what the family expects. Your obligation runs to the trust terms and the beneficiaries as a group.

What Does the Duty of Loyalty Actually Require?

The duty of loyalty is the one that trips up family trustees most often, because it prohibits transactions that feel completely reasonable at the time.

Under section 16004, a trustee may not use trust property for personal benefit or enter into a transaction where personal interests conflict with the trust’s interests. In practice, that means you cannot:

• Buy trust property yourself, even at what you believe is fair market value.
• Sell your own property to the trust.
• Lend trust money to yourself, your spouse, or your business.
• Take a “loan” from trust funds intending to pay it back later.

The statute goes further than most people expect. Section 16004 creates a presumption that the trustee violated their duty whenever the trustee gains an advantage from a transaction with a beneficiary during the trust’s existence. That flips the usual burden of proof: instead of a beneficiary proving you did something wrong, you have to prove the deal was fair.

Can a Trustee Who Is Also a Beneficiary Stay Impartial?

Yes, and it is extremely common. A parent names one adult child as successor trustee, and that child also inherits a share. California allows this, but it raises the level of scrutiny.

Section 16003 requires impartiality when a trust has two or more beneficiaries. A trustee-beneficiary has to be careful about decisions that quietly benefit their own share, including:

• Timing distributions so one beneficiary waits longer than another.
• Living in trust-owned property rent-free while siblings wait for their share.
• Choosing which assets go to whom when values differ.
• Sharing information with one sibling and not the others.

The safest approach is to document the reasoning behind every discretionary decision and to communicate the same information to everyone at the same time. If you are still choosing who should serve, our guide on choosing the right trustee for your family walks through the trade-offs.

How Must a Trustee Invest and Manage Trust Assets?

California follows the Uniform Prudent Investor Act, found at Probate Code sections 16045 through 16054. The standard is not perfection or maximum return. It is the care, skill, and caution a prudent investor would use, judged across the whole portfolio rather than on any single investment.

Practical requirements include:

• Diversify unless the trust says otherwise or circumstances make it imprudent.
• Consider the trust’s purposes, its time horizon, and the beneficiaries’ needs.
• Review inherited holdings. Keeping a parent’s concentrated stock position out of sentiment, without analyzing whether it still serves the beneficiaries, is itself a decision you can be held to.
• Delegate carefully. You may hire investment help, but you must select and supervise the professional prudently.

Trustees are also entitled to hire an attorney or CPA and pay reasonable fees from the trust. Getting help is not an admission that you are unfit for the role. It is often the prudent choice, and it is a normal part of trust administration.

What Information Must a Trustee Give Beneficiaries?

Silence is the fastest route to a lawsuit, and California law does not permit it. Section 16060 requires trustees to keep beneficiaries reasonably informed of the trust and its administration.

Two specific obligations matter most:

1. Notification within 60 days. When a revocable trust becomes irrevocable at the settlor’s death, section 16061.7 requires written notice to all beneficiaries and heirs. That notice triggers a 120-day window to contest the trust.
2. Accountings. Section 16062 generally requires an accounting at least annually, when the trust terminates, and on a change of trustee. An accounting shows receipts, disbursements, assets, and your compensation.

Beneficiaries who cannot get answers can petition the court under section 17200 to compel an accounting. Providing one voluntarily is far cheaper than being ordered to.

What Happens if a Trustee Breaches Their Duties?

Consequences are personal, not just institutional. Under Probate Code sections 16420 and 16440, a court can:

• Surcharge the trustee, meaning you personally repay the trust for losses your breach caused.
• Remove you under section 15642.
• Deny or reduce your compensation.
• Order you to return any profit you made from the breach.

In cases involving bad faith taking or concealment of trust property, Probate Code section 859 allows double damages plus attorney fees. Trustees are also personally exposed for failing to file the decedent’s final tax returns or the trust’s income tax returns. Naming the right person in the first place is part of a well-built estate plan.

The reassuring news for careful trustees: honest mistakes made in good faith, promptly disclosed and corrected, are treated very differently from concealment. Courts respond to transparency.

Frequently Asked Questions

Can a trustee be paid in California?

Yes. A trustee is entitled to the compensation stated in the trust, or reasonable compensation if the trust is silent, under Probate Code section 15681. Compensation should be documented in the accounting.

How long does a trustee have to distribute assets?

There is no fixed deadline. Most straightforward California trust administrations take 12 to 18 months, allowing time for notices, debts, taxes, and asset transfers.

Can a trustee be held personally liable?

Yes. A trustee who breaches a duty can be surcharged and ordered to repay the trust from personal funds, even without any intent to do harm.

Can a trustee resign?

Usually yes, following the procedure in the trust document or Probate Code section 15640. A trustee generally cannot simply walk away without a successor in place.

Does a trustee have to treat all beneficiaries equally?

Impartially, not identically. If the trust directs unequal shares, the trustee follows the trust. What the trustee cannot do is add their own favoritism.

Accept the Role With Your Eyes Open

Serving as trustee is manageable when you know the rules going in: follow the document, keep the money separate, communicate on a schedule, document your reasoning, and account on time. It becomes expensive when a trustee improvises. With California courts continuing to scrutinize fiduciary conduct closely in 2026, the trustees who stay out of trouble are the ones who treat the role as a job with legal standards rather than a family courtesy.

If you have been named successor trustee and want to be sure you are handling it correctly, or you are a beneficiary who cannot get straight answers, book a planning session with our team. We will help you meet your obligations and protect both the trust and yourself. You deserve it.

References

1. California Probate Code section 16002 (duty of loyalty).
2. California Probate Code section 16004 (duty to avoid conflict of interest).
3. California Probate Code section 16062 (duty to account to beneficiaries).
4. California Probate Code sections 16045 through 16054 (Uniform Prudent Investor Act).
5. California Probate Code section 16440 (measure of liability for breach of trust).