Trust Administration in California: What Every Successor Trustee Needs to Know

Written by Joshua D. Meier, Esq., Certified Tax Coach (American Institute of Certified Tax Planners) · Last reviewed August 2026

You have just lost someone you love, and somewhere in the trust binder your name appears as successor trustee. Most people read that sentence twice. Then they ask the same two questions: what am I actually supposed to do, and what happens if I get it wrong?

Both questions deserve clear answers. We have guided California families through trust administration since 2010, as part of the more than 3,000 families our firm has served. This guide covers what we most want every new trustee to know.

But you are carrying something deeper than a to-do list. The person who made this trust chose you. Doing the job well is one of the last ways you get to honor them and take care of the family they left behind. If you are like most trustees, that is what you want most: to get it right, keep the family close, and see your loved one’s wishes carried out the way they intended.

On this page:

• What trust administration means
• What a successor trustee must do
• The deadlines that matter
• Do I need an attorney
• How long it takes
• What it costs
• How our process works
• Five mistakes to avoid
• The family home and Prop 19

What is trust administration?

Trust administration is the process of carrying out a trust after the person who created it (the settlor) passes away. If the settlor properly set up and funded the trust, the trustee generally can administer the assets held in it without probate court. But “no court” does not mean “no process.” The successor trustee steps into a legal role with formal duties to the beneficiaries, enforceable deadlines, and personal responsibility for getting it right.

In broad strokes, administration means gathering and safeguarding the trust’s assets, giving legally required notices, paying valid debts and taxes, and accounting for everything. Then it means distributing the assets the way the trust says. For a typical California family with a home, retirement accounts, and ordinary investments, that is a process that generally takes about eight months to a year, sometimes longer. It has a defined beginning, middle, and end.

The goal is not just to close the trust. It is to carry out your loved one’s wishes faithfully, keep the family informed, and make the tax-sensitive decisions before the options disappear. It is also to leave a clear record that you handled the responsibility with care. That is where a good process takes you, and it shapes the rest of this guide.

Related: for how we handle these matters start to finish, see our trust administration page.

Before you distribute, retitle, sell, or sign anything

Secure the property, locate the complete trust and any amendments, order certified death certificates, and keep essential bills paid. But do not distribute money, transfer the home, promise assets to beneficiaries, or sign tax-sensitive documents until you understand your authority and the order in which the administration needs to proceed.

What does a successor trustee actually have to do?

Every trust is different, but a California trust administration generally moves through these steps:

1. Gather the documents and secure the assets. Locate the trust document and any amendments, safeguard the home, and identify every account and asset the trust holds. Order certified copies of the death certificate.
2. Give the required notices. California law generally requires the trustee to notify beneficiaries and the settlor’s heirs that the trust has become irrevocable. This notice starts important legal clocks, and skipping it can leave the trust exposed to challenge longer than necessary. The trustee also notifies the institutions and government agencies that need to know, so accounts, benefits, and any required claims are handled correctly.
3. Get a tax ID and inventory everything. The trust generally needs its own taxpayer identification number after the settlor’s death. Many assets need date-of-death values, which can matter significantly for taxes later (more on the basis step-up below).
4. Handle the home and any real estate. Recording the right documents, deciding who keeps the home or whether it sells, and protecting the property tax basis under Proposition 19 where possible. This step carries strict deadlines.
5. Pay debts, expenses, and taxes. Valid creditor claims, final income taxes for the person who passed, income taxes for the trust itself, and in larger estates a federal estate tax return. Some tax elections in this window are use-it-or-lose-it.
6. Account to the beneficiaries. Beneficiaries are generally entitled to information about what the trust holds and what the trustee has done with it. Clear, regular communication here can prevent many of the disputes we see.
7. Distribute and close. After resolving debts and taxes, the trustee distributes the assets per the trust’s terms, gets the appropriate releases, and closes the administration.

If that list feels heavy, that is an accurate feeling. The trustee role is a real job, and the law treats it as one.

What deadlines does a California trustee face?

A few clocks matter more than the rest:

• The beneficiary notice. Generally due within 60 days of the death (Probate Code §16061.7). Once the notice is served, it starts the period (generally 120 days from the notice, per Probate Code §16061.8) in which the trust can be contested. Serving it correctly helps protect the trustee and gets the administration onto firmer legal ground.
• The property tax deadlines. If an eligible child keeps the family home as a primary residence, Proposition 19 generally requires moving in within one year of the parent’s death and filing the homeowner’s exemption within that same one-year window. The parent-child exclusion claim generally must be filed within three years, or before the home is transferred to a third party, whichever comes first (Revenue and Taxation Code §63.2). A late filing may still be possible, but it generally applies going forward rather than back to the date of death. That can mean reassessment and a higher property tax bill for the period before it takes effect. This is a frequently missed step in trust administration.

The tax filing deadlines

A few different returns can come due, and most families only deal with the income tax ones:

• Income tax returns. A final personal income tax return for the person who passed, which follows the normal income tax calendar. Once the trust or estate has its own tax ID, it may also need to file its own income tax return, and that one can run on a different schedule.
• The federal estate tax return (larger estates only). Generally due nine months after death. A six-month extension to file is available if requested on time, but any estate tax owed is still due at nine months, and paying late can mean penalties and interest.
• Portability. Even an estate that owes no estate tax sometimes files a return to preserve a surviving spouse’s unused exemption. That election is far easier to make on time than to repair late.

Do I need a trust administration attorney in California?

California does not require a trustee to hire counsel. But even an administration that looks straightforward usually carries formal notices, tax and valuation decisions, hard deadlines, and personal liability if a step is missed.

Most people who take this on want the same thing: to do right by their family and handle it properly. That is why many trustees choose to work with an attorney, not because the law requires it, but so no important step slips through.

The responsibility is personal. If a required notice never goes out, if the home loses its property tax basis, or if assets are distributed before taxes are resolved, the beneficiaries generally look to the trustee, not to the trust, to make it right.

Most of our trust administration clients are not people who love legal paperwork. They are sons, daughters, and spouses who want to move the administration forward steadily while reducing avoidable personal-liability risk. In many administrations, the trust pays the appropriate professional fees, not the trustee personally. That is one reason trustees of estates with a home or meaningful assets often choose to get guidance early.

Not sure what has already been done? Talk with us before you distribute, retitle, sell, or sign anything.

How long does trust administration take?

Many California trust administrations take about eight to twelve months. Some finish sooner. Others remain open longer because of real estate sales, business interests, tax filings, creditor issues, or beneficiary questions. A trust staying open longer than a year does not necessarily mean the trustee is doing anything wrong. It may simply reflect the assets and tax issues involved.

The key question is whether the administration is moving in the right order. That means notices served, assets secured and valued, tax questions addressed, beneficiaries kept informed, and distributions held until debts, taxes, and appropriate reserves are understood.

Some delays are outside anyone’s control. Banks, government agencies, buyers, and tax filings move on their own schedules. A documented process keeps every part that can move moving and explains the quiet periods, so a normal delay does not become suspicion or family conflict.

What does trust administration cost?

It depends on the estate, so we will not put a number on a webpage that has never met your family. What we can tell you is how we work, and why families tell us it was worth it.

We handle trust administration for a flat fee, agreed in writing before the work begins, not an open-ended hourly rate. That matters for more than budgeting. Because the fee is settled up front, you can call us with a question any time during the process without watching a meter or bracing for another bill. We want you to reach out. Part of what you are paying for is a team that walks beside you through every step and is there when you are unsure, so you never carry a decision alone.

The flat-fee structure can also deliver meaningful financial value. First, a documented system that keeps the administration moving in the right order, so the parts that can move do move and the whole thing does not stall. That is what holds costs down and keeps family tension from building over delays. Second, tax-aware handling of the decisions that carry real dollars, including the step-up in basis, the Proposition 19 property tax deadlines, and a surviving spouse’s portability election. In the right matter, catching one of those in time can mean significant tax savings, or prevent an expensive and irreversible mistake. That is a real part of the value of getting guidance before a decision locks in.

How our Guided Trust Administration process works

Our Guided Trust Administration process helps trustees move through the required notices, asset gathering, valuations, tax coordination, beneficiary communication, and distribution planning in the right order. The goal is not to rush the process. It is to make sure the right steps happen at the right time, with the tax and family issues considered before any irreversible decision. You will know the scope and your flat fee before the work begins, and appropriate fees are generally paid from the trust.

We designed the process to do more than complete the legal work. It gives beneficiaries a clear roadmap, helps the trustee act even-handedly, and reduces the misunderstandings that can divide a family after a loss.

Five mistakes that can create tax, liability, and family problems

1. Missing or poorly documenting the step-up in basis. Many assets receive a new income tax basis at death. For real estate and significant investment accounts, a reliable date-of-death valuation can reduce capital gains when an asset is later sold. If the family keeps a rental property, the adjusted basis may also produce additional depreciation deductions. Delayed or inadequate valuations can make the tax benefit harder to document and may leave the family paying more tax than necessary.
2. Losing the home’s property tax basis. Missing the Proposition 19 deadlines on an inherited home (covered in more detail below). A late or missed filing can raise the family’s property tax bill, sometimes for the years before a late filing takes effect.
3. Skipping the estate tax return when it still mattered. Even estates that owe no federal estate tax may benefit from filing one to preserve a surviving spouse’s portability election. And if the nine-month deadline has already passed, it may not be too late. For estates that were not otherwise required to file an estate tax return, the IRS currently allows a late portability election, generally up to five years after death. That makes this decision worth revisiting even when the original deadline is long gone. That choice should be deliberate, not a default.
4. Distributing too early. A trustee who distributes assets and then discovers a tax bill or valid claim generally has a personal problem. Reserves exist for a reason.
5. Going quiet with the beneficiaries. Many trust disputes begin as communication problems, not money problems. Regular, plain-English updates can prevent the suspicion and resentment that turn family grief into a legal dispute.

What about the family home and Proposition 19?

If the plan is for a child to keep the family home, the trustee has to structure the administration with Proposition 19 in mind from the first week. That is especially true when there are multiple beneficiaries and one child needs to buy out the others. In some situations, the financing and the sequencing of the buyout determine whether the property tax exclusion survives. This is the kind of analysis that should happen before anyone signs transfer documents or moves money. We cover this topic in depth separately, but the short version for any new trustee is: do not move money or sign anything involving the home until this analysis is done. Our advanced tax planning practice handles these property tax and capital gains decisions before a deed or buyout goes through.

None of this has to rest on you alone. A well-handled administration ends with the notices served on time, the tax and property-tax deadlines met, the beneficiaries kept informed, and a clear record that helps protect you from avoidable personal liability. Done well, it does something more: it carries out your loved one’s wishes the way they intended and keeps the family whole through a hard season. That is the finish line we help trustees reach, so you can focus on honoring the person you lost, not on a legal worry hanging over the family.