Yes, an irrevocable trust can be changed in California, and often in more ways than people expect. The Probate Code allows modification or termination by written consent, by court petition, by decanting assets into a new trust, and through powers the settlor may have built into the trust document itself. Which route is open to you depends on whether the settlor is still living, whether the beneficiaries agree, what the trust was designed to accomplish, and how much discretion the trustee holds.
When the Settlor Is Still Alive: Modification by Consent
The most direct path is agreement. Under California Probate Code § 15404, the settlor and all beneficiaries can modify or terminate the trust in writing without going to court.1California Legislative Information. California Probate Code 15404 “All beneficiaries” is literal. Current, future, and contingent beneficiaries all have to sign. If the trust names beneficiaries only as “heirs” or “next of kin,” a court can narrow the required group to those reasonably likely to inherit.
What happens when a beneficiary refuses? The settlor and the beneficiaries who do agree can petition the court to modify or partially terminate the trust, provided the change doesn’t substantially impair the interests of anyone who didn’t consent.1California Legislative Information. California Probate Code 15404 A holdout can’t block a change that doesn’t actually cost them anything.
If a beneficiary is a minor, unborn, or lacks legal capacity, a court-appointed guardian ad litem can consent for them and may consider the broader benefit to the family in doing so.
After the Settlor Dies: Beneficiary Consent With Court Approval
Once the settlor is gone, unanimous beneficiary consent still opens the door, but the court applies a stricter test. Under Probate Code § 15403, if the requested change would conflict with a “material purpose” of the trust, the court must weigh the reasons for modification against the interest in preserving that purpose.2California Legislative Information. California Probate Code 15403
A material purpose usually shows up in provisions the settlor clearly cared about: a spendthrift clause protecting a beneficiary from creditors, staggered distributions timed to a beneficiary’s maturity, or conditions tied to specific milestones. Where a valid spendthrift provision restricts transfer of a beneficiary’s interest, the court cannot terminate the trust without finding “good cause.”2California Legislative Information. California Probate Code 15403
Court-Ordered Changes for Circumstances the Settlor Didn’t Anticipate
Probate Code § 15409 gives a trustee or beneficiary the ability to petition the court when circumstances the settlor didn’t know about or foresee would cause the trust’s original terms to defeat or substantially impair its purposes.3California Legislative Information. California Probate Code 15409 This route doesn’t require anyone’s consent, which makes it one of the strongest tools available.
The court can direct the trustee to take actions the trust document didn’t authorize or even prohibited, if that’s what serving the trust’s underlying purposes now requires.3California Legislative Information. California Probate Code 15409 A spendthrift clause is a factor the court weighs, but not a hard bar.
Small or Uneconomic Trusts
When administrative costs are chewing through a trust’s principal, Probate Code § 15408 offers a way out. A trustee or beneficiary can petition to terminate, modify, or replace the trustee of a trust whose value has fallen too low to justify the cost of running it.4California Legislative Information. California Probate Code 15408
If the principal is $100,000 or less, the trustee can terminate the trust outright without court approval.4California Legislative Information. California Probate Code 15408 A spendthrift provision doesn’t stop the court from applying this section.
Decanting Into a New Trust
Decanting lets a trustee move assets from an existing irrevocable trust into a new one with different terms, often without court approval or beneficiary consent. California adopted the Uniform Trust Decanting Act at Probate Code §§ 19500–19530, effective January 1, 2019.5California Legislative Information. California Probate Code 19502
What the Trustee Can Change Depends on Their Discretion
How much a trustee can alter through decanting turns on the type of distribution power the original trust grants. A trustee with “expanded distributive discretion,” defined as discretionary power not limited to an ascertainable standard, can make significant changes to the new trust’s terms, including how and when distributions happen 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 must serve purposes like health, education, support, or maintenance, has a narrower lane. That trustee can generally change administrative provisions but not the substantive distribution terms. Read the original trust carefully before assuming decanting is available.
Notice and Execution
The trustee must execute the decanting in a signed writing that identifies both trusts and specifies which assets are moving.6California Legislative Information. California Probate Code 19510 At least 60 days’ advance notice must go to the settlor if alive, all qualified beneficiaries, and anyone holding a power of appointment. That window gives interested parties time to review the changes and, if they object, take the matter to court.
Charitable Interests Get Extra Protection
If the original trust contains a charitable interest, the new trust cannot reduce that interest, cut the share of a named charity, 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
Powers Written Into the Trust Itself
A well-drafted trust often carries its own tools for change, sidestepping court petitions entirely.
Trust Protectors
A trust protector is an independent third party given specific powers by the trust document. Depending on how the trust is written, the protector may be able to modify terms, replace a trustee, or adjust beneficiary designations in response to changed family circumstances. Because the settlor built the authority into the trust, the protector can act without a court petition.
Powers of Appointment
A trust may grant a beneficiary a power of appointment, which is the right to direct where their share of trust assets goes, typically at the beneficiary’s death. A general power gives the beneficiary broad latitude over who receives the property. A limited power confines 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 requires. This doesn’t reshape the trust during the beneficiary’s lifetime, but it can rewrite who ultimately takes the assets.
Tax Risks Worth Checking Before You Change Anything
The IRS evaluates trust changes on its own terms, independent of any California court approval. A few traps come up often. When decanting reduces a beneficiary’s interest, the IRS may treat that reduction as a taxable gift by the beneficiary. The risk sharpens when a trustee is also a beneficiary holding broad discretionary powers, because decanting can look like the release of a general power of appointment, which carries gift tax consequences.
Trusts created before September 25, 1985, may be grandfathered from the generation-skipping transfer tax, and modifications can destroy that exemption if they extend the trust’s duration beyond certain limits or shift benefits to a lower generation. A modification that causes the settlor to be treated as the owner of trust assets for income tax purposes can also strip the trust of its status as a separate taxpaying entity. That matters because irrevocable trusts hit the top federal income tax bracket at a much lower income threshold than individuals do. Any change that shifts control or beneficial enjoyment should be reviewed by a tax professional first.
Cost and Timing
A petition to modify or terminate a trust under Probate Code § 17200 costs $435 in most California counties, with a local surcharge added in Riverside, San Bernardino, and San Francisco counties for courthouse construction.8California Courts. Statewide Civil Fee Schedule That’s the filing fee only. Attorney fees vary with complexity, and even a straightforward petition usually runs several thousand dollars once drafting, court appearances, and notice are accounted for.
Speed varies by route. Consent-based modifications under § 15404 can move quickly because no hearing is needed. Petitions under §§ 15403 or 15409 depend on the local probate court’s calendar and can take months in busy counties. Decanting requires the 60-day notice period, and any objection during that window can push the matter into court.
A court can also divide a single trust into two or more separate trusts if doing so serves the beneficiaries’ interests without defeating the trust’s purposes.9California Legislative Information. California Probate Code 17200 That option can help when beneficiaries have conflicting needs or when a split produces tax results a single trust couldn’t reach.