Trustee Duties: Care, Loyalty, Impartiality, Accounts

Trustee duties are the engine of the trusts syllabus. Creation questions are usually short; administration questions are where the marks are, because a trustee can breach without stealing anything, without losing money, and sometimes without doing anything at all. Four duties do most of the work, and each has its own remedy.

This guide sets out care, loyalty, impartiality and the duty to inform and account, explains the prudent investor rule that gives the duty of care its content, and covers the remedies for breach and the narrow effect of an exculpatory clause.

The trustee’s position

A trustee holds legal title to property for someone else’s benefit and must administer it in the beneficiaries’ interest. That is a stricter posture than the one a director occupies, because a trustee has no shareholders to answer to and no business judgment presumption to hide behind. Where a director gets deference for an informed decision, a trustee is measured against an objective standard of prudence.

Duty of care: the prudent investor rule

The modern standard asks what a prudent investor would do, and the prudent investor rule as expressed in the Uniform Prudent Investor Act and the Restatement (Third) of Trusts changed the enquiry in an important way. Investments are judged on a portfolio basis rather than individually, so a single speculative holding is not a breach if the overall allocation is sound.

Diversify, unless diversification is inappropriate for this trust.
Consider risk and return objectives together, in light of the trust’s purposes and the beneficiaries’ circumstances.
Monitor performance continuously and rebalance where necessary.
Delegate where prudent, with a continuing duty to select the agent carefully, define the scope of the delegation, and supervise.
Meet the higher standard that applies to a professional trustee, a bank or an adviser with special skills.
Keep trust property segregated from personal assets and properly earmarked as trust property.

Failure to diversify is the most commonly examined care breach, and the exceptions are narrow. The trust instrument may forbid it, retention of a particular asset may serve the trust’s purpose, such as keeping a family business intact, or diversification may be uneconomical. Each of those needs a clear justification on the facts, not an assumption.

Duty of loyalty: no self-dealing

The trustee must put the beneficiaries’ interests above every other interest, including their own. Self-dealing covers buying trust property, selling personal property to the trust, borrowing trust funds, and any transaction in which the trustee’s personal advantage diverges from the beneficiaries’.

The critical point is that fairness is not a defence. Even a transaction at a demonstrably fair price is generally voidable unless the trust instrument authorised it, the beneficiaries consented after full disclosure, or a court approved it in advance. Candidates who argue that the price was reasonable and stop there have missed what the duty prohibits.

Duty of impartiality

Where a trust has current income beneficiaries and remaindermen, the trustee must balance their competing interests. Distributing generously to income beneficiaries erodes what the remaindermen will receive; hoarding principal starves the income beneficiaries. Neither is neutral, and the duty requires a defensible balance rather than a preference.

Impartiality also affects investment choices, since high-yield assets favour income beneficiaries while growth assets favour remaindermen. A trustee whose portfolio quietly tilts toward one class is exposed even if the overall return is respectable.

Duty to inform and account

The trustee must keep beneficiaries apprised of trust affairs, respond to reasonable requests for information, disclose material facts affecting their interests, and deliver periodic accountings showing receipts, disbursements and current value. Annual accounting is the modern default unless the instrument provides otherwise.

This duty produces liability without loss, which surprises candidates. A trustee who invests impeccably but conceals a conflict, or who simply never accounts, has breached even though the trust is worth more than when it started. Say so explicitly when the facts show silence.

Duty	Typical breach	Usual remedy
Care	Failure to diversify or to monitor	Surcharge for the loss caused
Loyalty	Self-dealing, even at a fair price	Transaction voided; profits disgorged
Loyalty	Taking a trust opportunity	Constructive trust over the asset
Impartiality	Favouring income over remainder	Adjustment between the interests; surcharge
Inform and account	Non-disclosure or no accounting	Compelled accounting; removal; costs
Segregate and earmark	Commingling with personal funds	Strict liability for losses to that property

Each duty with the breach that usually appears in a fact pattern and the remedy that follows.

Exam tip: name the duty before describing the conduct. “This is a loyalty breach, not a care breach” changes the entire remedy discussion, because loyalty breaches attract disgorgement and constructive trusts while care breaches attract surcharge for actual loss.

Remedies for breach

Surcharge. The trustee personally pays the loss the breach caused.
Disgorgement. Any profit the trustee made is stripped, whether or not the trust lost anything.
Constructive trust. Misappropriated property, or property bought with trust funds, is held for the beneficiaries.
Removal. Available where the breach or the hostility it created makes continued administration untenable.
Denial of compensation. Fees may be reduced or refused.
Injunction. To compel an act the trustee is refusing or restrain one that is threatened.

Beneficiaries may also trace trust property into the hands of a recipient, subject to the protection given to a purchaser who took for value and without notice. Where several beneficiaries have different interests, the remedy must respect the impartiality principle rather than simply compensating whoever sued.

Exculpatory clauses

Trust instruments often try to limit trustee liability. Courts construe such clauses strictly and view them with suspicion, particularly where the trustee drafted the instrument or influenced its terms. A clause may excuse ordinary negligence, but it cannot shield wilful misconduct, gross negligence or bad faith, and a provision purporting to exclude “all liability” is usually read down to the narrower meaning.

Common mistakes that cost points

Judging each investment in isolation instead of on a portfolio basis.
Treating a fair price as a defence to self-dealing.
Assuming diversification is optional, or that a general power to retain assets excuses it.
Overlooking impartiality where the trust has both income and remainder beneficiaries.
Treating disclosure as discretionary, or requiring financial loss before finding a breach.
Giving an exculpatory clause its literal breadth.
Applying the business judgment rule, which belongs to corporate directors rather than trustees.
Awarding surcharge where the appropriate remedy is disgorgement or a constructive trust.

Frequently asked questions

Can a trustee delegate investment decisions?

Yes, under the modern rule, and doing so is often prudent. The trustee retains duties to select the agent with care, to set the terms of the delegation sensibly, and to review the agent’s performance. Delegation transfers the task, not the responsibility.

Do co-trustees have to act unanimously?

Modern statutes generally allow a majority of co-trustees to act, with a dissenting trustee protected if the dissent is recorded and the trustee does not participate in the breach. A co-trustee who acquiesces in another’s breach, or who fails to take reasonable steps to prevent it, is exposed.

What if the beneficiaries consented to the transaction?

Informed consent by a competent adult beneficiary can bar that beneficiary’s claim, provided the trustee disclosed all material facts and did not exert improper influence. Consent by one beneficiary does not bind the others, and it cannot validate conduct that harms a class that could not consent.

Trustee duties under the California Probate Code, 2026

California codifies trustee obligations in detail, so a Los Angeles County dispute is argued from statutory text rather than from general fiduciary principles. Sections 16000 and following of the California Probate Code set out the duty to administer the trust according to its terms, the duty of loyalty in section 16002, the obligation to deal impartially among beneficiaries in section 16003 and the prohibition on conflicting transactions in section 16004.

Investment conduct is governed by California’s version of the prudent investor rule, which judges decisions by reference to the portfolio as a whole and the trust’s purposes rather than by the outcome of any single holding. The duty may be expanded, restricted or eliminated by the trust instrument in specified respects, so the first step in any analysis is reading what the settlor actually provided.

The provisions that generate litigation here:

The 120-day notice is decisive. Section 16061.7 requires notification when a revocable trust becomes irrevocable, and it starts the period within which a contest must be brought.
Accounting duties are enforceable by petition. A beneficiary may compel an account in the probate division of the Los Angeles Superior Court, and failure to account is a common ground for removal.
Self-dealing is presumptively improper. Transactions between trustee and trust are voidable regardless of fairness unless authorised.
Co-trustees must act together. Unless the instrument provides otherwise, joint action is required and a dissenting co-trustee should document objection.
Real property duties are heavy in this county. Managing, insuring and deciding whether to sell high-value residential property is where impartiality disputes concentrate.
Removal and surcharge are the remedies. Section 15642 lists removal grounds, and damages may include lost profits and interest.

For 2026, read the instrument, then the statute, then the notice dates. Read with will execution requirements, conflicts of interest and the business judgment rule.

Next steps

Fiduciary reasoning repeats across subjects, so compare frameworks deliberately. The business judgment rule and fiduciary duties covers the corporate version and shows how much more protection directors receive than trustees do, while the conflicts of interest decision tree sets out the professional-responsibility version built on disclosure and informed consent. If the trust was created by will, the will execution requirements determines whether the instrument that created it is valid at all.

For practice, take one portfolio and change a single fact each time: concentrate it in one stock, have the trustee buy a parcel from the trust at market value, favour the income beneficiary, then have the trustee stop sending accountings. Reading the trusts overview at Cornell’s Legal Information Institute alongside your notes will keep the duties and their remedies paired correctly.