Yes, an irrevocable trust can be changed in California, despite the name. The Probate Code gives you several routes: unanimous written consent of the settlor and beneficiaries, a court petition under one of a few specific statutes, decanting the assets into a new trust with updated terms, or using flexibility the settlor built into the trust document itself. Which route fits depends on who is still living, what kind of change you need, and how much discretion the trust grants its trustee.
Change by Agreement While the Settlor Is Living
The cleanest path is agreement. Under California Probate Code § 15404, the settlor and all beneficiaries can modify or terminate an irrevocable trust by written consent, with no court involvement.1California Legislative Information. California Probate Code 15404 “All beneficiaries” is literal. Current beneficiaries, future beneficiaries, and contingent beneficiaries all have to sign.
If some beneficiaries refuse, the settlor and the agreeing beneficiaries can still petition the court for a modification or partial termination, provided the change does not substantially impair the interests of the ones who did not agree.1California Legislative Information. California Probate Code 15404 A beneficiary who objects on principle cannot block a change that does not actually reduce their share.
Change by Beneficiary Agreement After the Settlor Has Died
Once the settlor is gone, unanimous beneficiary consent can still support a modification, but the court takes on a gatekeeping role it did not have before. Under Probate Code § 15403, if the proposed change conflicts with a material purpose of the trust, the court must weigh the reasons for the change against the interest in carrying that purpose out.2California Legislative Information. California Probate Code 15403
Material purposes are the provisions that were central to why the settlor set the trust up: a spendthrift clause shielding a beneficiary from creditors, staggered distributions keeping a young beneficiary from spending everything at once, or conditions tied to specific life events. When the trust contains a valid spendthrift provision restricting transfers of a beneficiary’s interest, the court cannot terminate the trust unless it finds good cause.2California Legislative Information. California Probate Code 15403 That is a higher bar.
Asking the Court to Change the Trust for Unforeseen Circumstances
Sometimes the facts on the ground have moved too far from what the settlor imagined. Probate Code § 15409 lets a trustee or beneficiary petition the court to modify or even terminate a trust when circumstances the settlor did not know about or anticipate would cause the original terms to defeat or substantially impair the trust’s purposes.3California Legislative Information. California Probate Code 15409
This is one of the most powerful tools in California trust law because it does not require anyone’s consent. The court can order the trustee to take actions the original trust document never authorized, or even actions it specifically prohibited, if doing so is necessary to carry out the underlying purposes.3California Legislative Information. California Probate Code 15409 A spendthrift clause does not automatically block modification under this section. The court weighs it as a factor rather than treating it as a bar.
Ending a Trust That’s Too Small to Run
Small trusts can become uneconomic to administer. When costs eat into principal to the point that the trust can no longer serve its purpose, Probate Code § 15408 provides a way out. A trustee or beneficiary can petition the court to terminate the trust, modify its terms, or appoint a new trustee.4California Legislative Information. California Probate Code 15408
If the trust principal is $100,000 or less, the trustee can terminate it outright without court approval.4California Legislative Information. California Probate Code 15408 A spendthrift provision does not prevent a court from applying this section.
Decanting Into a New Trust
Decanting is the trust-law equivalent of pouring from one bottle into another. The trustee distributes assets from the existing irrevocable trust into a new trust that carries different terms, often without court approval or beneficiary consent. California adopted the Uniform Trust Decanting Act (Probate Code §§ 19500–19530), which took effect January 1, 2019.5California Legislative Information. California Probate Code 19502
What a Trustee Can Change Depends on Their Discretion
How much a trustee can alter through decanting turns on the type of distribution authority the original trust grants. A trustee with “expanded distributive discretion,” which the statute defines as discretionary power not limited to an ascertainable standard, has wide latitude. That trustee can make significant changes to the new trust’s terms, including altering how and when distributions are made, or even removing a beneficiary.5California Legislative Information. California Probate Code 19502
A trustee whose distribution power is limited to an ascertainable standard, meaning distributions can only be made for things like health, education, support, or maintenance, has a narrower lane. That trustee can generally change administrative provisions but not substantive distribution terms. Checking what powers the original trust document actually grants is the first step before considering decanting at all.
Notice and Execution
Decanting is not done quietly. The trustee must execute it in a signed writing that identifies both the original and the new trust and specifies which assets are moving.6California Legislative Information. California Probate Code 19510 The trustee must give at least 60 days’ advance notice to the settlor if living, all qualified beneficiaries, and anyone holding a power of appointment under the trust. That window gives interested parties time to review the proposal and, if they want, go to court.
Extra Protection for Charitable Interests
When the original trust includes a charitable interest, decanting is more constrained. The new trust cannot diminish the charitable interest, reduce the share going to the named charitable organization, change the stated charitable purpose, or alter related conditions. The California Attorney General has the rights of a qualified beneficiary and must receive the same notice.7California Legislative Information. California Probate Code 19514
Change Mechanisms Built Into the Trust
A well-drafted irrevocable trust often carries its own tools for later adjustment, which can bypass both court petitions and the decanting process.
Trust Protectors
A trust protector is an independent third party given specific powers inside the trust document. The settlor decides how broad those powers are, but common ones include modifying trust terms, replacing a trustee, and adjusting beneficiary designations as family circumstances change. Because the protector acts under authority the settlor built in, no court petition is required. If you are drafting a new irrevocable trust, a protector provision is one of the strongest ways to keep future options open.
Powers of Appointment
A trust may grant a beneficiary a power of appointment, which is the right to direct where their share of the trust assets will go, usually at the beneficiary’s death. This does not change the trust’s operating terms during the beneficiary’s lifetime, but it effectively lets the beneficiary decide who ultimately receives the assets. A general power gives wide latitude over who takes the property. A limited power restricts the choice to a defined group, such as the settlor’s descendants. The beneficiary exercises the power through a will or another written instrument as the trust specifies.
Tax Consequences to Watch For
Changing an irrevocable trust can trigger tax results that catch people by surprise. The IRS does not care that a California court approved the modification; it evaluates the tax impact on its own terms.
When a trust is decanted and a beneficiary’s interest shrinks in the process, the IRS may treat that reduction as a taxable gift by the beneficiary. The risk is sharpest when a trustee who is also a beneficiary holds broad discretionary powers, because decanting can look like the release of a general power of appointment, which carries its own gift tax consequences. Trusts created before September 25, 1985 may be grandfathered from the generation-skipping transfer tax, but modifying one of those trusts can destroy that exemption if the change extends the trust’s duration beyond certain limits or shifts benefits to a lower generation.
If a modification causes the settlor to be treated as the owner of trust assets for income tax purposes, the trust can lose its status as a separate taxpaying entity. That matters because irrevocable trusts hit the top federal income tax bracket at a far lower income threshold than individuals do. Any change that affects who controls or benefits from the trust assets deserves a look from a tax professional before it is finalized.
What It Costs and How Long It Takes
Filing a petition under Probate Code § 17200 to modify or terminate a trust costs $435 in most California counties, though Riverside, San Bernardino, and San Francisco add a local surcharge for courthouse construction.8California Courts. Statewide Civil Fee Schedule That is only the filing fee. Attorney fees vary with complexity, but even a straightforward petition typically runs several thousand dollars once drafting, court appearances, and notice are counted.
Timing matters too. Consent modifications under § 15404 can move quickly because no hearing is needed. Court petitions under §§ 15403 or 15409 run at the pace of the probate court’s calendar, which in busy counties can mean months between filing and hearing. Decanting carries at least a 60-day notice period before the trustee can act, and any objection within that window can push the matter into court. If you are working against a deadline, the route you pick may matter as much as whether the change is legally available.