Successor Trustee Duties in California:
Your Legal Obligations from Day One

You Are a Fiduciary — Understanding What That Means

When you accept the role of successor trustee, you become a fiduciary — a person with the highest legal duty of care and loyalty recognized in the law. A fiduciary must put the interests of the trust beneficiaries above their own interests in every decision. California courts take fiduciary duties seriously, and trustees who breach these duties face personal liability for losses caused to the trust.

Understanding your legal duties before you take any action is not optional — it is essential.

The Core Fiduciary Duties of a California Trustee

Duty of Loyalty

You must administer the trust solely in the interest of the beneficiaries. You cannot engage in self-dealing — buying trust assets for yourself at below-market prices, borrowing from the trust, paying yourself excessive compensation, or directing business to companies you have an interest in. Even transactions that seem reasonable can violate the duty of loyalty if they benefit the trustee at the expense of beneficiaries.

Duty of Impartiality

If the trust has multiple beneficiaries — or different categories of beneficiaries (current income beneficiaries vs. remainder beneficiaries) — you must treat them impartially. Decisions that benefit income beneficiaries at the expense of remainder beneficiaries, or vice versa, can constitute a breach. Investment decisions must balance the interests of all beneficiaries.

Duty to Administer the Trust

You must actually do the work of administering the trust — managing assets, paying bills, filing tax returns, distributing assets. A trustee who sits on the trust for months without action while assets deteriorate or tax deadlines are missed is breaching this duty.

Duty of Prudent Investment

California follows the Uniform Prudent Investor Act. You must invest trust assets as a "prudent investor" would — considering the overall trust portfolio, risk tolerance, and the needs of current and future beneficiaries. This doesn't mean zero risk — it means reasonable, diversified investment management appropriate to the trust's purposes.

Duty to Keep Records and Account

You must keep complete and accurate records of all trust transactions — every receipt, every payment, every distribution, every investment decision. Beneficiaries have the right to an accounting, and you must be able to explain every financial decision. Poor recordkeeping is one of the most common causes of trustee liability claims.

Duty to Inform Beneficiaries

California Probate Code imposes specific notice requirements. Beyond the initial Section 16061.7 notice, you must keep beneficiaries reasonably informed of trust administration and respond to reasonable requests for information. You must provide annual accountings to beneficiaries (or as the trust requires) and notify beneficiaries of material events affecting the trust.

Duty of Confidentiality (With Limits)

Trust documents and administration are generally private — unlike probate, which is a public court proceeding. However, confidentiality has limits: beneficiaries have the right to information about their interests in the trust, and the trustee cannot withhold information that beneficiaries are legally entitled to receive.

The Successor Trustee Duty Checklist: In Order

1. Obtain death certificate copies (order 10–15 certified copies)
2. Locate and read the trust document and all amendments
3. Send Probate Code § 16061.7 notice to all beneficiaries and heirs-at-law within 60 days
4. Obtain EIN for the trust from the IRS
5. Open a trust estate bank account
6. Take control of trust assets — notify financial institutions, freeze distributions pending administration
7. Inventory and appraise all assets as of the date of death
8. Identify and notify creditors and pay valid debts
9. File the decedent's final income tax returns (federal and California)
10. File trust fiduciary income tax returns (Form 1041 / FTB 541) for each year of administration
11. File federal estate tax return if required or to elect portability (within 9 months)
12. File Prop 19 exclusion claims with county assessors where applicable
13. Transfer real property by recording new deeds
14. Distribute assets to beneficiaries per trust terms — after debts and taxes are resolved
15. Obtain receipts and releases from each beneficiary
16. Close the trust with a final accounting

Common Trustee Mistakes That Lead to Personal Liability

• Distributing assets before paying debts and taxes
• Failing to send the required § 16061.7 notice within 60 days
• Commingling trust funds with personal funds
• Failing to obtain appraisals and document stepped-up basis values
• Missing tax filing deadlines and incurring penalties chargeable to the trust
• Favoring one beneficiary over another without trust authorization
• Failing to invest trust assets prudently (leaving large sums in cash for extended periods)
• Paying yourself excessive trustee compensation
• Self-dealing — buying trust assets, directing business to your own companies