Short answer: Without a plan, a stepchild you never legally adopted inherits nothing from you under California’s intestate succession rules, and a will alone does not fix that because a will only takes effect once a court validates it through probate. A trust built for a blended family, especially a QTIP trust that pays income to your surviving spouse while preserving the principal for your own children, is usually the tool that actually keeps a second marriage from pitting a spouse against kids from a first one.
What happens to a stepchild if there’s no plan?
California’s intestate succession statutes decide who inherits when someone dies without a will, not the decedent’s actual wishes (Probate Code § 6400). Stepchildren who were never legally adopted, along with unmarried partners, generally inherit nothing under those statutes (Probate Code §§ 6401 through 6402). If a surviving spouse is in the picture, that spouse takes the entire community and quasi-community estate (Probate Code § 6401(a) to (b)), and separate property gets split between the spouse and any children under a set schedule (Probate Code § 6401(c)). None of that reflects how most blended families would actually choose to divide things. It reflects a formula.
Does a will alone solve the problem?
A will lets you say who gets what, but naming people in a will is not the same as those assets passing outside the court system. A will does not avoid probate. It only takes effect once probate validates it. Only a revocable living trust that has actually been funded, meaning the assets are retitled into the trust’s name, passes to beneficiaries without going through probate. For a blended family, a living trust also lets you spell out different treatment for children from different relationships privately, instead of airing it in a public probate file.
How does a QTIP trust deal with a spouse and kids from a prior marriage?
The core tension in most blended families is wanting to take care of a surviving spouse while still making sure your own children, particularly children from a first marriage, eventually get what you intended for them. A Qualified Terminable Interest Property trust, known as a QTIP trust, is built for exactly that conflict. It can pay income to the surviving spouse for life while the principal is locked in place and ultimately passes to the children you named, not to whomever your spouse remarries or names in their own estate plan later (Internal Revenue Code § 2056(b)(7)). A QTIP trust works alongside the unlimited marital deduction, which lets transfers between spouses pass free of federal estate tax (Internal Revenue Code § 2056(a)), so the spouse is provided for now and the children’s inheritance is protected later.
Do beneficiary designations matter more than the will?
Beneficiary designations on life insurance, retirement accounts, and payable-on-death bank accounts control regardless of what your will or trust says. These forms get filled out once, at account opening, and then forgotten. After a remarriage, an outdated designation can send a retirement account straight to an ex-spouse instead of a current spouse or a child, no matter what the will was later drafted to say. Every beneficiary designation should get reviewed at the same time you sign new estate planning documents, not treated as a separate errand for later.
Do stepchildren need to be named specifically?
Because stepchildren do not inherit automatically, the only way to include one is to name that child directly in a will or trust. Silence is not neutral. Leaving a stepchild out of the document, even by accident, functions as an exclusion. If the intent is for a stepchild to be treated like a biological child, the documents have to say so in writing.
What role does a prenuptial or postnuptial agreement play?
A prenuptial or postnuptial agreement can set expectations in advance about which assets are reserved for children from a prior relationship and which are shared with a new spouse. California is a community property state, and without an agreement or separate estate planning, the line between what belongs to a first family and what belongs to a new marriage can blur, particularly once income and property start commingling during the marriage itself. A written agreement, paired with a trust that follows through on its terms, does the actual work. The agreement alone does not distribute anything at death, and a couple that signs one but never funds a matching trust has only done half the job.
Figures verified July 2026.
What to do next
Sit down with an estate planning attorney and bring a specific list: who you want to inherit what, which stepchildren should be treated as your own, and which accounts still list an ex-spouse as beneficiary. A generic will written before a remarriage will not sort this out on its own, and the sooner the documents match the current family, the fewer surprises there are later.
Want a straight read on where you stand?
Talk to Eric. A free 30-minute call, no pitch. He’ll tell you where you’re exposed, what it would cost to fix, and what you can skip.
Talk to Eric