California Trust Laws: Validity, Trustee Duties, and Taxes

California trust laws, set out mainly in the state’s Probate Code, let you create a legal arrangement in which a trustee holds property for named beneficiaries under rules you write. A properly drafted and funded trust keeps your estate out of probate court, stays private because nothing is filed with any court, and lets your successor trustee distribute assets in weeks rather than the year or more California probate typically takes. The rules that make this work — validity requirements, trustee duties, post-death notification, and a handful of California-specific tax provisions — are strict enough that a few common oversights can undo the whole plan.

What Makes a California Trust Valid

Every California trust has three roles, and one person can hold more than one. The settlor (also called trustor or grantor) creates the trust and puts property into it. The trustee holds legal title and manages the property under the trust’s terms. The beneficiary receives the benefits, whether that means income during the settlor’s lifetime, a distribution at death, or both. In most California estate plans the settlor names themselves as initial trustee and designates a successor to take over at death or incapacity.

California recognizes several methods of creation: a declaration by a property owner that they hold the property as trustee, a transfer to another person as trustee, a testamentary trust created in a will, a power of appointment, or an enforceable promise to create one.1California Legislative Information. California Code PROB 15200 – Creation of Trusts

Beyond the method, a trust must meet four substantive requirements. The settlor must clearly intend to create a trust.2California Legislative Information. California Code PROB 15201 – Intent to Create Trust There must be identifiable trust property, because a document without assets has no legal effect.3Justia Law. California Probate Code 15200-15212 – Creation and Validity of Trusts The trust must name a beneficiary or a class of beneficiaries that can be identified. And the trust’s purpose must be lawful.

Any trust involving real property must be in writing and signed by either the trustee or the settlor.3Justia Law. California Probate Code 15200-15212 – Creation and Validity of Trusts Trusts holding only personal property can technically be oral, but proving the terms of an oral trust in a dispute is difficult enough that virtually every California estate planning attorney puts them in writing anyway.

Revocable or Irrevocable

The first structural choice is between a revocable trust and an irrevocable one. California presumes a trust is revocable unless the document expressly says otherwise.4California Legislative Information. California Code Probate Code PROB 15400

A revocable living trust is the standard California estate planning tool. The settlor can amend the terms, swap beneficiaries, add or remove property, or dissolve the trust entirely at any time while mentally competent. Because the trust holds title to the assets, they pass directly to the named beneficiaries at the settlor’s death, without court involvement.5California Courts. Check if You Can Use a Simple Process to Transfer Property It also provides a built-in incapacity plan: the successor trustee steps in without a court-appointed conservatorship. The trade-off is that a revocable trust gives no asset protection and no tax benefit during the settlor’s lifetime. Because the settlor keeps full control, the IRS treats the assets as part of the taxable estate, and creditors can still reach them.

An irrevocable trust is the reverse bargain. The settlor gives up the power to modify or revoke and permanently surrenders ownership of the property. In exchange, the trust property is generally shielded from the settlor’s future creditors and may be excluded from the settlor’s taxable estate for federal estate tax purposes. Irrevocable trusts come in specialized forms for insurance, charitable giving, and beneficiaries with disabilities, each aimed at a different planning goal, but all sharing that core feature: the settlor cannot take the assets back.

Funding: The Step People Skip

Signing a trust document is only half the work. The trust controls nothing until property is formally retitled into its name. This step is called funding, and skipping it is the single most common estate planning mistake in California. An unfunded trust is an empty container. Any asset still titled in the settlor’s individual name at death passes through probate, which is exactly the outcome the trust was meant to avoid.

Funding looks different for different assets. Real estate requires recording a new deed transferring the property from the individual to the trust. Bank and investment accounts need to be retitled in the trust’s name, or the trust needs to be named as beneficiary. Cars, business interests, and other titled property need their ownership records updated.

If a settlor dies leaving assets outside the trust, California allows a possible workaround called a Heggstad petition, in which the successor trustee asks the court to confirm the settlor intended those assets to be part of the trust. The petition requires evidence of intent and is not guaranteed to succeed. When it fails, the assets go through full probate. The safer approach is to fund the trust completely at the start and update it whenever new property is acquired.

What a Trustee Must Do

A California trustee is a fiduciary, held to one of the highest standards of care the law recognizes. The overriding duty is to administer the trust according to its terms and, where the terms are silent, according to the Probate Code.6California Legislative Information. California Probate Code 16000 – Duty to Administer Trust The specific duties that matter most in practice:

A trustee without investment expertise can delegate investment management to a qualified professional. The trustee remains responsible for choosing the advisor carefully, defining the scope of the delegation, and reviewing performance over time. Family members serving as amateur trustees should consider delegation rather than making investment calls they aren’t equipped for.

When a trustee falls short, a California court can remove them. Grounds include breach of trust, insolvency or unfitness, failure or refusal to act, excessive compensation, and hostility among co-trustees that impairs administration.10California Legislative Information. California Code PROB 15642 – Removal of Trustee A removed trustee can also be personally liable for losses caused by the breach.

California law does not set a fixed trustee fee schedule. A trustee is entitled to “reasonable” compensation given the trust’s complexity, the estate’s size, the time required, and the trustee’s expertise. If beneficiaries believe the fees are excessive, that is itself a ground for court intervention.

After the Settlor Dies: the 60-Day Notice

When the settlor of a revocable living trust dies, the trust becomes irrevocable and the successor trustee’s work begins. California imposes a specific deadline: within 60 days of the settlor’s death, the successor trustee must serve a written notice on every beneficiary of the now-irrevocable trust and every legal heir of the deceased settlor.11California Legislative Information. California Code PROB 16061.7 – Notification by Trustee The notice must identify the settlor, give the date the trust was executed, and provide the trustee’s name and address, among other required information.

Sending that notice starts a 120-day window during which any beneficiary or heir can contest the trust in court. Once the window closes without a challenge, the trust is largely shielded from later disputes. Skipping or botching the notification leaves the trust open to challenge indefinitely, which is one of the more damaging mistakes a successor trustee can make.

Beyond the notice, the successor trustee has to inventory trust assets, obtain date-of-death valuations for tax and distribution purposes, pay the settlor’s outstanding debts and final taxes, and then distribute the remaining assets under the trust’s terms. Accountings to beneficiaries continue throughout.

Property Tax Under Proposition 19

One of the more overlooked pieces of California trust planning is property tax. Before Proposition 19 took effect in February 2021, parents could transfer real property to children through a trust without triggering reassessment, up to $1 million in assessed value for non-primary-residence property, with an unlimited exclusion for a primary residence. Prop 19 narrowed those rules sharply.

Now a parent-to-child transfer of a primary residence avoids full reassessment only if the child moves in as their own primary residence within one year of receiving it and files for the homeowner’s exemption in the same window. Even then, if the home’s fair market value exceeds its current assessed value by more than $1 million (adjusted for inflation starting in 2023), the tax base partially increases. Investment properties and vacation homes transferred through a trust are reassessed at full fair market value with no exclusion.

The impact on families holding Proposition 13–protected tax bases on valuable California real estate can be severe. A home with a $200,000 assessed value and a $2 million market value can see its property tax bill multiply several times over when it passes to a child who does not live there. A trust alone does not solve this. Families need to decide up front whether the inheriting child will actually use the home as a primary residence and plan accordingly.

Federal Estate Tax and Step-Up in Basis

California does not impose its own estate tax or inheritance tax. The federal estate tax still applies to estates above the exemption. For 2026, following the One Big Beautiful Bill signed into law on July 4, 2025, the basic exclusion is $15 million per individual, and married couples can effectively shield up to $30 million using portability.12Internal Revenue Service. What’s New — Estate and Gift Tax Estates above the exemption face a top federal rate of 40%.

For most California families the bigger tax question is the step-up in basis. When property passes through a trust after the settlor’s death, the cost basis resets to fair market value on the date of death.13Office of the Law Revision Counsel. 26 USC 1014 – Basis of Property Acquired From a Decedent A home bought for $150,000 and worth $1.2 million at death gives the beneficiary a $1.2 million basis, so a sale near that price produces little or no capital gains tax. Property in a standard revocable living trust qualifies for the step-up. Some irrevocable trusts do not, depending on how they are structured, which means the choice of trust type has direct capital gains consequences.

Creditor Protection and Spendthrift Clauses

How much a trust actually protects assets from creditors depends on its structure and whose creditors are asking.

A revocable trust gives no creditor protection during the settlor’s lifetime. Because the settlor still controls the assets and can reclaim them at any time, creditors can reach them as if they sat in the settlor’s own name.

An irrevocable trust protects more, because the settlor no longer owns the property. California does not, however, allow domestic asset protection trusts, which are irrevocable trusts where the settlor is also a beneficiary. Some states allow them, but California courts are not required to honor the protections of a trust established in another state for a California resident.

For protecting beneficiaries from their own creditors, the tool is a spendthrift clause. When the trust provides that a beneficiary’s interest in principal cannot be voluntarily or involuntarily transferred, creditors generally cannot reach the trust assets until the trustee actually distributes them.14California Legislative Information. California Probate Code 15301 – Restraint on Transfer of Principal Once money leaves the trust and lands in the beneficiary’s personal account, the protection ends. Spendthrift provisions are especially useful when a beneficiary faces potential lawsuits, divorce, or financial instability.

Modifying, Revoking, and Contesting a Trust

Revoking a revocable trust is straightforward. California presumes trusts are revocable unless the document says otherwise, and the settlor can amend or revoke at any time while mentally competent.4California Legislative Information. California Code Probate Code PROB 15400 Most trust documents spell out how, typically by written amendment or full restatement.

Modifying an irrevocable trust is harder. The usual path requires all beneficiaries to consent and then petition the court. Even with unanimous consent, the court will deny the petition if the change would undermine a material purpose of the trust; a spendthrift clause requires a showing of good cause before termination.15California Legislative Information. California Probate Code 15403 – Modification and Termination of Trusts When minor or unborn beneficiaries are involved, court approval is almost always needed because those beneficiaries cannot consent. Courts can also modify a trust when circumstances have changed in ways the settlor did not anticipate, or when continuing the trust as written would defeat the settlor’s original purpose, provided the change is consistent with what the settlor would have wanted.

Some trusts include a no-contest clause (sometimes called an in terrorem clause) that disinherits a beneficiary who challenges the trust in court and loses. California enforces these, but only against a direct contest brought without probable cause.16California Legislative Information. California Code PROB 21311 – Enforcement of No Contest Clause Probable cause means the facts known to the contestant would lead a reasonable person to believe there is a realistic chance of winning. A beneficiary with legitimate grounds to suspect fraud or undue influence can challenge the trust without risking the inheritance even if the challenge ultimately fails. The clause can cover challenges to property transfers and creditor’s claims, but only if the trust document expressly says so. That is a narrower rule than most people expect, and it prevents settlors from using the threat of disinheritance to shut out every legitimate challenge.