California Pretermitted Child Rule: Omitted Heirs Explained

Diagram summarising pretermitted child California under California and federal law — Visual summary of pretermitted child California

What Happens If You Have a Child After Signing Your Will?

Every year, California parents sign a will, then have another child and never get around to updating it. If you’re one of them, California’s pretermitted child rule is the law that decides whether that child is protected — and it’s one of the most tested doctrines on the California Bar Exam.

The rule lives in Probate Code sections 21620 through 21623. It’s narrower than most people assume, and the exceptions matter as much as the rule itself. Here’s exactly how it works, for law students and parents alike.

What Is a Pretermitted Child in California?

A pretermitted (omitted) child is a child born or adopted after a parent signed their will, or a child alive at signing but unknown to the parent or believed dead, who was not provided for in the will. Under Probate Code Section 21620, that child receives a share equal to what they would have gotten if the parent had died without a will at all.

Notice what this rule does not cover. A child who was alive and known to the parent when the will was signed, but who simply wasn’t mentioned, is not a pretermitted heir. That child has no claim under this statute at all — silence isn’t the same as omission in the legal sense.

The Two Ways a Child Can Qualify

California law recognizes two distinct paths to pretermitted status:

Afterborn or after-adopted children (§ 21620). The child was born or adopted after the parent executed all of their testamentary documents — the will and any trust or codicil still in effect at death.
Unknown or presumed-dead children (§ 21622). The child existed when the will was signed, but the parent didn’t know the child existed, or believed the child had died — and that mistaken belief was the sole reason the child was left out.

That second path is stricter than it looks. Courts read “solely” narrowly: if the will contains a general disinheritance clause like “I leave nothing to any children not named herein,” that language shows the omission wasn’t solely due to ignorance — and the child loses the claim even though the parent genuinely didn’t know the child existed.

The Three Exceptions That Defeat a Claim

Even a child who otherwise qualifies gets nothing if the party opposing the claim proves one of three things under Probate Code Section 21621:

Intentional omission appears in the will itself. A generic “I intend to omit any children not specifically named” clause defeats the claim — but the intent has to show up in the document; silence about future children is not enough.
Substantially all the estate went to the child’s other parent. The law assumes the child will be provided for through that parent.
The parent already provided for the child outside the estate — a lifetime gift, trust, or insurance policy intended as a substitute for a bequest.

The burden of proving one of these exceptions falls on whoever wants to defeat the child’s claim, not on the child.

How Much Does an Omitted Child Receive?

Scenario	Outcome
Child born after will signed; no exception applies	Full intestate share
Will contains express disinheritance language	Nothing — § 21621(a) exception applies
Parent left nearly everything to the child’s other parent	Nothing — § 21621(b) exception applies
Parent set up a trust for the child “in lieu of” a bequest	Nothing — § 21621(c) exception applies
Child was alive and known at signing, just not mentioned	No claim under this doctrine at all

Once a child qualifies, Probate Code Section 21623 funds that share by reducing everyone else’s gifts pro rata — the surviving spouse’s gift generally isn’t touched, but other beneficiaries, including named individuals and charities, share the reduction proportionally.

Worked Example: Maria’s Will

Maria signs a will in 2020 leaving $100,000 to her son Diego, $100,000 to her daughter Sofia, and the $400,000 residue to a local animal shelter. She never mentions the possibility of future children and includes no disinheritance language. In 2023, Maria has a third child, Lucas, and dies in 2026 without ever amending the will.

Analysis: Lucas was born after Maria executed her only testamentary instrument, so he falls squarely within Section 21620. None of the three exceptions apply — there’s no disinheritance clause, no “other parent” who received substantially everything, and no outside provision for Lucas. He qualifies as pretermitted and takes a one-third intestate share of the $600,000 estate: $200,000. That amount comes pro rata out of Diego’s, Sofia’s, and the shelter’s gifts under Section 21623, since Maria left no surviving spouse.

Pretermitted Child vs. Omitted Spouse vs. Just Left Out

Bar exam questions love to blur these together, so keep them separate:

Pretermitted child: triggered by birth/adoption after execution (or unknown existence); yields an intestate share under §§ 21620–21623.
Omitted spouse: a completely different statute (Probate Code §§ 21610–21611), triggered by marriage after the will was signed, using a different formula built on community property.
Known child, simply omitted: no statutory claim at all under either doctrine — the only remedy, if any, is a will contest on grounds like undue influence.

Practical Advice for California Parents

If you already have a will and welcome a new child, don’t assume the pretermitted child rule will fix everything for you. It only kicks in if you never update the document, and even then, litigation to prove or disprove the exceptions costs your family time and money. The cleaner move is a simple codicil or a new will naming every child by name, including a clause addressing children born in the future either way.

Frequently Asked Questions

Does a pretermitted child automatically inherit under California law?

Not automatically. The child must prove they qualify under Section 21620 or 21622, and the estate can defeat the claim by proving one of the three exceptions in Section 21621, such as an express disinheritance clause.

What if my will already says “I intend to omit any children not named”?

That clause protects your estate plan. It shows the intent to omit is deliberate, which satisfies the first exception under Section 21621 and defeats a later pretermitted-child claim — even for children born after you sign.

Does this rule apply to a child I knew about but just forgot to mention?

No. The pretermitted child statute only protects children born or adopted after execution, or children unknown to you at signing. A known child who was simply left out has no claim under this doctrine.

Key Takeaways

California’s pretermitted child rule (Probate Code §§ 21620–21623) protects only afterborn/after-adopted children and children unknown to the parent at signing.
A known child who is simply left out of the will has no claim under this statute.
Three exceptions can defeat an otherwise-qualifying child’s claim: intentional omission shown in the will, substantially all the estate left to the other parent, or an outside-the-estate provision meant as a substitute.
A qualifying child receives a full intestate share, funded by pro rata reduction of other beneficiaries’ gifts.
This doctrine is separate from the omitted-spouse statute — different trigger, different formula.
The safest fix is updating your will or adding a codicil after every birth or adoption.

This article is educational and is not legal advice. Consult a licensed California attorney about your situation.