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The Pillar Guide

Wills: What They Do and How They Fit Your Plan

A will is one of the most familiar estate planning documents—but also one of the most misunderstood. This guide explains what a will actually does in California, how it differs from a trust, and why many families still need one.

Estimated reading time: 10 minutes

Educational use only

This guide is for general educational purposes only. It is not legal advice. For guidance about your specific situation, speak with a qualified California estate planning attorney.

Signed estate planning documents on a desk

Quick overview

Three things to know before you dive in.

What a will is

A will is a written document that says who should receive your property after you die and who should manage the process.

How it works

After death, a will is submitted to court, validated if needed, and used to guide how assets pass to the people you named.

Why families still use them

Even trust-based plans often include a will—especially to name guardians for children and catch assets that were never transferred into a trust.

What a will actually does

A will is your written instructions for after you die. It can say who should inherit your property, who should manage your estate, and—in California—who should raise your minor children if both parents are gone.

Think of it as a letter to the court and your family about your wishes. It does not take effect until you pass away. While you are alive, you can usually update it as your life changes.

A will is important, but it is not the whole story. What it can and cannot do depends on how your assets are titled and what other planning documents you have in place.

How a will works in California

After someone dies, their will is typically submitted to the probate court in the county where they lived. The court checks whether the will is valid and appoints someone—often called an executor—to carry out its instructions.

The executor gathers assets, pays valid debts and taxes, and distributes what remains to the beneficiaries named in the will. If there is no will, California intestacy laws decide who inherits instead.

Assets that pass through a will often go through probate. That is one reason many California families pair a will with a living trust or use other transfer methods for major assets like a home.

Wills vs. living trusts

A will and a living trust both say who should receive your property. The big difference is timing and how assets are handled.

A will generally takes effect after death and often works through the court system. A living trust can hold assets during your lifetime and may allow your successor trustee to manage and distribute property without probate—if those assets were properly transferred into the trust.

Many California families use both. The trust handles most funded assets privately. The will serves as a backup and covers things the trust cannot—like naming guardians. Read our Living Trusts guide for a deeper look at how trusts work.

What is a pour-over will?

In a trust-based estate plan, you may hear about a pour-over will. This is a special type of will that says: any assets still in your name at death should “pour over” into your living trust.

It acts as a safety net. If you forgot to transfer an account or bought new property and never retitled it, the pour-over will can help get that asset into the trust after death—though it may still pass through probate first.

A pour-over will is not a substitute for funding your trust. It is a backup for assets that slipped through the cracks. Learn more on our Will & Pour-Over Will page.

Naming guardians for minor children

For parents of young children, one of the most important jobs a will can do is name a guardian. This is the person you would want to raise your children if both parents die while the kids are still minors.

Without a will, a court decides who takes on that role—usually following California law and family relationships. That may not match what you would have chosen.

Naming a guardian in your will does not guarantee the court will appoint that person, but it carries significant weight. It gives the judge clear guidance about your wishes during a difficult time.

What a will does not do

A will has limits. It generally does not control assets that already have their own transfer rules, such as:

  • Life insurance or retirement accounts with a named beneficiary
  • Bank accounts with a payable-on-death designation
  • Property held in certain joint ownership arrangements
  • Assets already held in a properly funded living trust

A will also does not help if you become incapacitated during your lifetime. For that, families typically use powers of attorney and healthcare directives as part of a complete plan.

Is a simple will enough—or do you need a broader plan?

A will can be a solid starting point, especially when assets are limited, probate exposure is low, and your family situation is straightforward. Naming beneficiaries and an executor still matters.

The conversation often shifts when you own California real estate, have minor children, want to reduce court delay, or expect administration to be complicated. In those cases, families commonly explore a living trust and supporting documents rather than relying on a will alone.

If you are weighing your options, our Do I Need a Living Trust? tool and decision guide can help you think through common factors in plain English.

Common misconceptions

“A will avoids probate.” Usually not. Assets that pass through a will often still go through court. Probate avoidance usually requires other tools, like a funded trust.

“I do not need a will if I have a trust.” Many trust plans still include a pour-over will—for guardianship, backup coverage, and assets left outside the trust.

“A handwritten note counts as a will.” California allows holographic wills in some cases, but they can be easier to challenge. A properly executed will is usually safer.

“Once I write a will, I am done.” Life changes—marriage, divorce, new children, new property. Your will should be reviewed when those changes happen.

When to update your will

A will is not a one-and-done document. Consider reviewing it after major life events, including:

  • Marriage, divorce, or a new domestic partnership
  • Birth or adoption of a child
  • Death of a beneficiary or executor you named
  • Buying or selling a home, or a significant change in assets
  • Moving to or from California

Even if nothing major has changed, a periodic review every few years can help make sure your will still reflects what you want.

Not sure whether you need a will, a trust, or both?

Pillar helps California families understand how wills, trusts, and probate fit together—so you can decide what may be worth exploring next.

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