Paul is the trustee of an irrevocable trust his mother signed in 2004 and funded with a rental house in Corona. She died in 2019. The trust hands each grandchild a share outright at 25, and one grandchild now receives SSI and Medi-Cal. A six-figure check could cost him both. The document says it cannot be amended, and the woman who signed it is gone.
National articles usually assume the Uniform Trust Code and its nonjudicial settlement agreements. California never adopted the UTC, and its own tools carry different costs.
Can beneficiaries change an irrevocable trust in California without a judge?
Only if the person who created the trust is alive and joins in. Since January 1, 2018, Cal. Prob. Code § 15404(a) has allowed modification or termination “by the written consent of the settlor and all beneficiaries without court approval.”
Once the settlor has died, the route is section 15403, which always requires a petition. Even with unanimous consent, the court can refuse if the trust still serves “a material purpose” that outweighs the reason for the change. A spendthrift clause matters less than people assume: section 15403(b) uses it to block termination without good cause, not modification.
Minors and unborn grandchildren cannot sign. Section 15405 lets a guardian ad litem appointed under section 1003 consent for them in court. Since January 1, 2026, AB 565’s rewritten section 15804 also allows UTC-style virtual representation: a parent may bind minor and later-born children, and someone with a substantially identical interest may bind others, absent a conflict of interest. A settlor can never represent a beneficiary on modifying an irrevocable trust.
Can a California trustee decant a trust instead of going to court?
Often, yes. California’s version of the uniform decanting act, Cal. Prob. Code §§ 19501 to 19530, took effect in 2019 and reaches older trusts. The trustee moves assets into a second trust with better terms. Section 19507 requires no consent or court order, only notice at least 60 days ahead to the qualified beneficiaries and others, with a bold warning to contest within 59 days, though section 19507(i) keeps a later abuse-of-discretion challenge alive.
A trustee whose principal discretion is not tied to health, education, support or maintenance decants under section 19511 but cannot add beneficiaries or cut a vested interest. A trustee bound by that standard falls under section 19512, which keeps each interest “substantially similar.” (My post on bypass trusts and the $15 million exemption covers decanting for basis step-up.)
Only a settlor is barred from decanting, so a beneficiary-trustee qualifies, but section 16081(c) usually caps that trustee’s discretion over his own distributions at the same standard. The exception that matters for Paul is section 19513, which lets a trustee move a disabled beneficiary’s interest into a special needs trust as if he had expanded discretion, if that furthers the trust’s purposes. A spendthrift clause does not block decanting under section 19515(c); an express prohibition does.
When will a California court change a trust because circumstances changed?
Section 15409 lets a trustee or beneficiary petition, through section 17200(b)(13), to change administrative or dispositive terms when, “owing to circumstances not known to the settlor and not anticipated by the settlor,” the trust as written would defeat or substantially impair its purposes. No one else has to agree. In Stewart v. Towse, 203 Cal. App. 3d 425, 428 (1988), a surviving spouse sought to replace the successor trustee of irrevocable B and C trusts, and the court confirmed the long-standing “equity power to modify the terms of a trust” to preserve it or serve the trustor’s intent. The evidence must show what changed and why the settlor could not have foreseen it.
Does a trust protector clause work under California law?
Yes, but only through the document. I have not found a California statute defining a protector’s powers or duties, or a published California appellate decision on the role; the decanting act uses “protector” only for whoever enforces a pet trust (section 19523). Still, section 19503(d) preserves another person’s power to modify a trust “under the trust instrument.” Whether a protector owes fiduciary duties is unsettled, so I spell out the standard of conduct when I draft one.
Which trust changes cause gift, GST or property tax problems?
Gift tax can fall on beneficiaries. In Chief Counsel Advice 202352018 (Dec. 29, 2023), beneficiaries consented to a court modification adding a power to reimburse the grantor’s income tax, and the IRS called it a taxable gift by them. It said silence after statutory notice and a right to object gives the same answer, which resembles California decanting. The memo is not precedent. IRS Notice 2011-101 sought comments on decanting; I have found no guidance since.
For GST-exempt trusts, Treas. Reg. § 26.2601-1(b)(4) shelters a decanting only if the document or state law allowed it when the trust became irrevocable, and California had no decanting statute before 2019. Other modifications pass if they neither shift an interest to a lower generation nor delay vesting. These rules address trusts irrevocable by September 25, 1985; for trusts exempt by allocation, I apply them because nothing else is written. Section 19519 lets decanting switch grantor-trust status, subject in some cases to a living settlor’s written objection.
Real property adds a California risk. Property Tax Rule 462.160 finds a change in ownership “to the extent that persons other than the trustor-transferor are or become present beneficiaries,” and BOE Annotation 220.0821 applies that to sprinkle powers reaching anyone without an exclusion. Cal. Rev. & Tax. Code § 62(d) protects a transfer into trust only while the trustor is the present beneficiary or the trust is revocable. After Prop 19, section 63.2 excludes only a principal residence or family farm, so adding a grandchild as a current beneficiary of a rental usually means reassessment.
How would a Riverside County family fix a 2004 trust?
Back to Paul, with illustrative numbers: his mother, Evelyn, put the Corona rental (worth about $900,000, assessed near $310,000) and a $700,000 brokerage account in the trust. Paul and his sister Dana each take half the income for life, Paul may pay principal for health and support, and each half then passes to that child’s children at 25. Dana’s son Marco, born in 2007, has a developmental disability. Dana has a 16-year-old and Paul a 12-year-old. Evelyn allocated GST exemption in 2004.
A section 15403 petition in Riverside County Superior Court needs Paul, Dana, Marco if he has capacity, and someone to bind the minors and unborn grandchildren. Section 15804 probably lets the parents do it, but I would budget for a guardian ad litem: perhaps four to eight months and $10,000 to $25,000. Under section 19513, Paul gives 60 days’ notice and decants Dana’s half into a second trust that holds Marco’s eventual share in a third-party special needs trust, roughly three to four months and $6,000 to $12,000. A section 15409 petition works because Marco was not born when Evelyn signed; uncontested, figure five to nine months and $12,000 to $30,000. These are my estimates, not quotes.
The cautious choice is to decant and then ask the court to approve it under section 19509(a)(3), pleading section 15409 in the alternative. The order shuts the door section 19507(i) leaves open and, under section 15804(d), binds represented beneficiaries. Watch the language for Marco’s death. If his remainder newly passes to his own children, value shifts down a generation and fails the GST test; a testamentary general power of appointment for Marco is one common fix, and it keeps any gift by him incomplete under Treas. Reg. § 25.2511-2(b). No one becomes a present beneficiary of the house, so no reassessment; a sprinkle power over rent for the grandchildren would have exposed part of the $590,000 gap between value and assessment.
| Route | Who must agree | Court | Notice and limits | Tax watch |
|---|---|---|---|---|
| Settlor plus beneficiaries (§ 15404) | Living settlor and every beneficiary, in writing | No, unless someone refuses | Minors and unborn need a representative | Gift by beneficiaries who give up value |
| Beneficiary petition (§ 15403) | Every beneficiary | Always | Material purpose test; spendthrift clause limits termination | Gift risk under CCA 202352018 |
| Decanting (§§ 19511 to 19513) | Trustee alone | Optional approval | 60 days’ notice; no new beneficiaries | GST safe harbor unlikely before 2019; grantor status can change |
| Changed circumstances (§ 15409) | No one; court decides | Always | Facts the settlor did not know or anticipate | Same GST no-shift test |
| Protector clause | Protector named in the document | No | Only powers the document grants | Depends on the change |
Frequently Asked Questions
Can we change our parents’ irrevocable trust after they die in California?
Not by private agreement alone. With the settlors gone, beneficiaries need a court order under Probate Code section 15403 or 15409, or the trustee may be able to decant. The route depends on whether everyone agrees and on the trustee’s powers.
Does a spendthrift clause stop a California trust from being modified?
Not by itself. Under section 15403 it bars termination unless the court finds good cause, and in a changed-circumstances petition it is only a factor. Decanting is allowed despite a spendthrift clause unless the document expressly prohibits decanting.
How long does decanting take in California?
Notice must go out at least 60 days before the trustee acts, unless everyone entitled to notice signs a waiver. Drafting adds a few weeks, and court approval adds the wait for a probate hearing.
Who signs for minor or unborn beneficiaries in California?
Since January 1, 2026, Probate Code section 15804 lets a parent represent minor and later-born children if there is no conflict of interest. A court-appointed guardian ad litem remains available and is safer when the parent’s own interest is affected.
Will changing an irrevocable trust raise the property tax on a California house?
It can. Making someone without an exclusion a present beneficiary, such as a grandchild whose parent is living, may reassess that share. Administrative changes that keep the same present beneficiaries usually do not.
How North Star Law Firm Can Help
North Star Law Firm handles modification petitions and decanting for California trustees and beneficiaries through its trust administration practice, drafts protector and decanting terms into new revocable living trusts, and prepares the resulting trust and estate tax returns. Phillip Zagotti is a California attorney and a CPA, admitted to the U.S. Tax Court, and co-author of Trusted: The Essential Guide for Trustees.
If an older trust no longer fits your family, contact North Star Law Firm or schedule a consultation before anyone signs a consent or sends a decanting notice.